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gem5/system/alpha/palcode/osfpal.s
Erik Hallnor f33cf070c7 Add copy implementations to palcode. 
palcode/osfpal.s:
    Add copypal loop copy implementation.
2004-05-17 17:18:32 -04:00

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// modified to use the Hudson style "impure.h" instead of ev5_impure.sdl
// since we don't have a mechanism to expand the data structures.... pb Nov/95
// build_fixed_image: not sure what means
// real_mm to be replaced during rewrite
// remove_save_state remove_restore_state can be remooved to save space ??
#include "ev5_defs.h"
#include "ev5_impure.h"
#include "ev5_alpha_defs.h"
#include "ev5_paldef.h"
#include "ev5_osfalpha_defs.h"
#include "fromHudsonMacros.h"
#include "fromHudsonOsf.h"
#include "dc21164FromGasSources.h"
#ifdef SIMOS
#define DEBUGSTORE(c) nop
#else
#define DEBUGSTORE(c) \
lda r13, c(zero) ; \
bsr r25, debugstore
#endif
#define DEBUG_EXC_ADDR()\
bsr r25, put_exc_addr; \
DEBUGSTORE(13) ; \
DEBUGSTORE(10)
#define egore 0
#define acore 0
#define beh_model 0
#define ev5_p2 1
#define ev5_p1 0
#define ldvpte_bug_fix 1
#define osf_chm_fix 0
// Do we want to do this?? pb
#define spe_fix 0
// Do we want to do this?? pb
#define build_fixed_image 0
#define ev5_pass2
#define enable_p4_fixups 0
#define osf_svmin 1
#define enable_physical_console 0
#define fill_err_hack 0
#define icflush_on_tbix 0
#define max_cpuid 1
#define perfmon_debug 0
#define rawhide_system 0
#define rax_mode 0
// This is the fix for the user-mode super page references causing the machine to crash.
#if (spe_fix == 1) && (build_fixed_image==1)
#define hw_rei_spe br r31, hw_rei_update_spe
#else
#define hw_rei_spe hw_rei
#endif
// redefine a few of the distribution-code names to match the Hudson gas names.
// opcodes
#define ldqp ldq_p
#define stqp stq_p
#define ldlp ldl_p
#define stlp stl_p
#define r0 $0
#define r1 $1
#define r2 $2
#define r3 $3
#define r4 $4
#define r5 $5
#define r6 $6
#define r7 $7
#define r8 $8
#define r9 $9
#define r10 $10
#define r11 $11
#define r12 $12
#define r13 $13
#define r14 $14
#define r15 $15
#define r16 $16
#define r17 $17
#define r18 $18
#define r19 $19
#define r20 $20
#define r21 $21
#define r22 $22
#define r23 $23
#define r24 $24
#define r25 $25
#define r26 $26
#define r27 $27
#define r28 $28
#define r29 $29
#define r30 $30
#define r31 $31
// .title "EV5 OSF PAL"
// .ident "V1.18"
//
//****************************************************************************
//* *
//* Copyright (c) 1992, 1993, 1994, 1995 *
//* by DIGITAL Equipment Corporation, Maynard, Mass. *
//* *
//* This software is furnished under a license and may be used and copied *
//* only in accordance with the terms of such license and with the *
//* inclusion of the above copyright notice. This software or any other *
//* copies thereof may not be provided or otherwise made available to any *
//* other person. No title to and ownership of the software is hereby *
//* transferred. *
//* *
//* The information in this software is subject to change without notice *
//* and should not be construed as a commitment by DIGITAL Equipment *
//* Corporation. *
//* *
//* DIGITAL assumes no responsibility for the use or reliability of its *
//* software on equipment which is not supplied by DIGITAL. *
//* *
//****************************************************************************
// .sbttl "Edit History"
//+
// Who Rev When What
// ------------ --- ----------- --------------------------------
// DB 0.0 03-Nov-1992 Start
// DB 0.1 28-Dec-1992 add swpctx
// DB 0.2 05-Jan-1993 Bug: PVC found mtpr dtb_CM -> virt ref bug
// DB 0.3 11-Jan-1993 rearrange trap entry points
// DB 0.4 01-Feb-1993 add tbi
// DB 0.5 04-Feb-1993 real MM, kludge reset flow, kludge swppal
// DB 0.6 09-Feb-1993 Bug: several stack pushers used r16 for pc (should be r14)
// DB 0.7 10-Feb-1993 Bug: pushed wrong PC (+8) on CALL_PAL OPCDEC
// Bug: typo on register number for store in wrunique
// Bug: rti to kern uses r16 as scratch
// Bug: callsys saving wrong value in pt_usp
// DB 0.8 16-Feb-1993 PVC: fix possible pt write->read bug in wrkgp, wrusp
// DB 0.9 18-Feb-1993 Bug: invalid_dpte_handler shifted pte twice
// Bug: rti stl_c could corrupt the stack
// Bug: unaligned returning wrong value in r17 (or should be and)
// DB 0.10 19-Feb-1993 Add draina, rd/wrmces, cflush, cserve, interrupt
// DB 0.11 23-Feb-1993 Turn caches on in reset flow
// DB 0.12 10-Mar-1993 Bug: wrong value for icsr for FEN in kern mode flow
// DB 0.13 15-Mar-1993 Bug: wrong value pushed for PC in invalid_dpte_handler if stack push tbmisses
// DB 0.14 23-Mar-1993 Add impure pointer paltemp, reshuffle some other paltemps to match VMS
// DB 0.15 15-Apr-1993 Combine paltemps for WHAMI and MCES
// DB 0.16 12-May-1993 Update reset
// New restriction: no mfpr exc_addr in cycle 1 of call_pal flows
// Bug: in wrmces, not clearing DPC, DSC
// Update swppal
// Add pal bugchecks, pal_save_state, pal_restore_state
// DB 0.17 24-May-1993 Add dfault_in_pal flow; fixup stack builder to have common state for pc/ps.
// New restriction: No hw_rei_stall in 0,1,2 after mtpr itb_asn
// DB 0.18 26-May-1993 PVC fixes
// JM 0.19 01-jul-1993 Bug: OSFPAL_CALPAL_OPCDEC, TRAP_OPCDEC -- move mt exc_addr after stores
// JM 0.20 07-jul-1993 Update cns_ and mchk_ names for impure.mar conversion to .sdl
// Bug: exc_addr was being loaded before stores that could dtb_miss in the following
// routines: TRAP_FEN,FEN_TO_OPCDEC,CALL_PAL_CALLSYS,RTI_TO_KERN
// JM 0.21 26-jul-1993 Bug: move exc_addr load after ALL stores in the following routines:
// TRAP_IACCVIO::,TRAP_OPCDEC::,TRAP_ARITH::,TRAP_FEN::
// dfault_trap_cont:,fen_to_opcdec:,invalid_dpte_handler:
// osfpal_calpal_opcdec:,CALL_PAL_callsys::,TRAP_UNALIGN::
// Bugs from PVC: trap_unalign - mt pt0 ->mf pt0 within 2 cycles
// JM 0.22 28-jul-1993 Add WRIPIR instruction
// JM 0.23 05-aug-1993 Bump version number for release
// JM 0.24 11-aug-1993 Bug: call_pal_swpipl - palshadow write -> hw_rei violation
// JM 0.25 09-sep-1993 Disable certain "hidden" pvc checks in call_pals;
// New restriction: No hw_rei_stall in 0,1,2,3,4 after mtpr itb_asn - affects HALT(raxmode),
// and SWPCTX
// JM 0.26 07-oct-1993 Re-implement pal_version
// JM 0.27 12-oct-1993 One more time: change pal_version format to conform to SRM
// JM 0.28 14-oct-1993 Change ic_flush routine to pal_ic_flush
// JM 0.29 19-oct-1993 BUG(?): dfault_in_pal: use exc_addr to check for dtbmiss,itbmiss check instead
// of mm_stat<opcode>. mm_stat contains original opcode, not hw_ld.
// JM 0.30 28-oct-1993 BUG: PVC violation - mf exc_addr in first cycles of call_pal in rti,retsys
// JM 0.31 15-nov-1993 BUG: WRFEN trashing r0
// JM 0.32 21-nov-1993 BUG: dtb_ldq,itb_ldq (used in dfault_in_pal) not defined when real_mm=0
// JM 0.33 24-nov-1993 save/restore_state -
// BUG: use ivptbr to restore mvptbr
// BUG: adjust hw_ld/st base/offsets to accomodate 10-bit offset limit
// CHANGE: Load 2 pages into dtb to accomodate compressed logout area/multiprocessors
// JM 0.34 20-dec-1993 BUG: set r11<mode> to kernel for ksnv halt case
// BUG: generate ksnv halt when tb miss on kernel stack accesses
// save exc_addr in r14 for invalid_dpte stack builder
// JM 0.35 30-dec-1993 BUG: PVC violation in trap_arith - mt exc_sum in shadow of store with mf exc_mask in
// the same shadow
// JM 0.36 6-jan-1994 BUG: fen_to_opcdec - savePC should be PC+4, need to save old PS, update new PS
// New palcode restiction: mt icsr<fpe,hwe> --> 3 bubbles to hw_rei --affects wrfen
// JM 0.37 25-jan-1994 BUG: PVC violations in restore_state - mt dc_mode/maf_mode ->mbox instructions
// Hide impure area manipulations in macros
// BUG: PVC violation in save and restore state-- move mt icsr out of shadow of ld/st
// Add some pvc_violate statements
// JM 0.38 1-feb-1994 Changes to save_state: save pt1; don't save r31,f31; update comments to reflect reality;
// Changes to restore_state: restore pt1, icsr; don't restore r31,f31; update comments
// Add code to ensure fen bit set in icsr before ldt
// conditionally compile rax_more_reset out.
// move ldqp,stqp macro definitions to ev5_pal_macros.mar and add .mcall's for them here
// move rax reset stuff to ev5_osf_system_pal.m64
// JM 0.39 7-feb-1994 Move impure pointer to pal scratch space. Use former pt_impure for bc_ctl shadow
// and performance monitoring bits
// Change to save_state routine to save more iprs.
// JM 0.40 19-feb-1994 Change algorithm in save/restore_state routines; add f31,r31 back in
// JM 0.41 21-feb-1994 Add flags to compile out save/restore state (not needed in some systems)
// remove_save_state,remove_restore_state;fix new pvc violation in save_state
// JM 0.42 22-feb-1994 BUG: save_state overwriting r3
// JM 0.43 24-feb-1994 BUG: save_state saving wrong icsr
// JM 0.44 28-feb-1994 Remove ic_flush from wr_tbix instructions
// JM 0.45 15-mar-1994 BUG: call_pal_tbi trashes a0 prior to range check (instruction order problem)
// New pal restriction in pal_restore_state: icsr<fpe>->floating instr = 3 bubbles
// Add exc_sum and exc_mask to pal_save_state (not restore)
// JM 0.46 22-apr-1994 Move impure pointer back into paltemp; Move bc_ctl shadow and pmctr_ctl into impure
// area.
// Add performance counter support to swpctx and wrperfmon
// JM 0.47 9-may-1994 Bump version # (for ev5_osf_system_pal.m64 sys_perfmon fix)
// JM 0.48 13-jun-1994 BUG: trap_interrupt --> put new ev5 ipl at 30 for all osfipl6 interrupts
// JM 0.49 8-jul-1994 BUG: In the unlikely (impossible?) event that the branch to pal_pal_bug_check is
// taken in the interrupt flow, stack is pushed twice.
// SWPPAL - update to support ECO 59 to allow 0 as a valid address
// Add itb flush to save/restore state routines
// Change hw_rei to hw_rei_stall in ic_flush routine. Shouldn't be necessary, but
// conforms to itbia restriction.
// Added enable_physical_console flag (for enter/exit console routines only)
// JM 0.50 29-jul-1994 Add code to dfault & invalid_dpte_handler to ignore exceptions on a
// load to r31/f31. changed dfault_fetch_err to dfault_fetch_ldr31_err and
// nmiss_fetch_err to nmiss_fetch_ldr31_err.
// JM 1.00 1-aug-1994 Add pass2 support (swpctx)
// JM 1.01 2-aug-1994 swppal now passes bc_ctl/bc_config in r1/r2
// JM 1.02 15-sep-1994 BUG: swpctx missing shift of pme bit to correct position in icsr (pass2)
// Moved perfmon code here from system file.
// BUG: pal_perfmon - enable function not saving correct enables when pme not set (pass1)
// JM 1.03 3-oct-1994 Added (pass2 only) code to wrperfmon enable function to look at pme bit.
// JM 1.04 14-oct-1994 BUG: trap_interrupt - ISR read (and saved) before INTID -- INTID can change
// after ISR read, but we won't catch the ISR update. reverse order
// JM 1.05 17-nov-1994 Add code to dismiss UNALIGN trap if LD r31/F31
// JM 1.06 28-nov-1994 BUG: missing mm_stat shift for store case in trap_unalign (new bug due to "dismiss" code)
// JM 1.07 1-dec-1994 EV5 PASS1,2,3 BUG WORKAROUND: Add flag LDVPTE_BUG_FIX. In DTBMISS_DOUBLE, branch to
// DTBMISS_SINGLE if not in palmode.
// JM 1.08 9-jan-1995 Bump version number for change to EV5_OSF_SYSTEM_PAL.M64 - ei_stat fix in mchk logout frame
// JM 1.09 2-feb-1995 Add flag "spe_fix" and accompanying code to workaround pre-pass4 bug: Disable Ibox
// superpage mode in User mode and re-enable in kernel mode.
// EV5_OSF_SYSTEM_PAL.M64 and EV5_PALDEF.MAR (added pt_misc_v_cm) also changed to support this.
// JM 1.10 24-feb-1995 Set ldvpte_bug_fix regardless of ev5 pass. set default to ev5_p2
// ES 1.11 10-mar-1995 Add flag "osf_chm_fix" to enable dcache in user mode only to avoid
// cpu bug.
// JM 1.12 17-mar-1995 BUG FIX: Fix F0 corruption problem in pal_restore_state
// ES 1.13 17-mar-1995 Refine osf_chm_fix
// ES 1.14 20-mar-1995 Don't need as many stalls before hw_rei_stall in chm_fix
// ES 1.15 21-mar-1995 Add a stall to avoid a pvc violation in pal_restore_state
// Force pvc checking of exit_console
// ES 1.16 26-apr-1995 In the wrperfmon disable function, correct meaning of R17<2:0> to ctl2,ctl2,ctl0
// ES 1.17 01-may-1995 In hw_rei_update_spe code, in the osf_chm fix, use bic and bis (self-correcting)
// instead of xor to maintain previous mode in pt_misc
// ES 1.18 14-jul-1995 In wrperfmon enable on pass2, update pmctr even if current process does
// not have pme set. The bits in icsr maintain the master enable state.
// In sys_reset, add icsr<17>=1 for ev56 byte/word eco enable
//
#define vmaj 1
#define vmin 18
#define vms_pal 1
#define osf_pal 2
#define pal_type osf_pal
#define osfpal_version_l ((pal_type<<16) | (vmaj<<8) | (vmin<<0))
//-
// .sbttl "PALtemp register usage"
//+
// The EV5 Ibox holds 24 PALtemp registers. This maps the OSF PAL usage
// for these PALtemps:
//
// pt0 local scratch
// pt1 local scratch
// pt2 entUna pt_entUna
// pt3 CPU specific impure area pointer pt_impure
// pt4 memory management temp
// pt5 memory management temp
// pt6 memory management temp
// pt7 entIF pt_entIF
// pt8 intmask pt_intmask
// pt9 entSys pt_entSys
// pt10
// pt11 entInt pt_entInt
// pt12 entArith pt_entArith
// pt13 reserved for system specific PAL
// pt14 reserved for system specific PAL
// pt15 reserved for system specific PAL
// pt16 MISC: scratch ! WHAMI<7:0> ! 0 0 0 MCES<4:0> pt_misc, pt_whami, pt_mces
// pt17 sysval pt_sysval
// pt18 usp pt_usp
// pt19 ksp pt_ksp
// pt20 PTBR pt_ptbr
// pt21 entMM pt_entMM
// pt22 kgp pt_kgp
// pt23 PCBB pt_pcbb
//
//-
// .sbttl "PALshadow register usage"
//
//+
//
// EV5 shadows R8-R14 and R25 when in PALmode and ICSR<shadow_enable> = 1.
// This maps the OSF PAL usage of R8 - R14 and R25:
//
// r8 ITBmiss/DTBmiss scratch
// r9 ITBmiss/DTBmiss scratch
// r10 ITBmiss/DTBmiss scratch
// r11 PS
// r12 local scratch
// r13 local scratch
// r14 local scratch
// r25 local scratch
//
//
//-
// .sbttl "ALPHA symbol definitions"
// _OSF_PSDEF GLOBAL
// _OSF_PTEDEF GLOBAL
// _OSF_VADEF GLOBAL
// _OSF_PCBDEF GLOBAL
// _OSF_SFDEF GLOBAL
// _OSF_MMCSR_DEF GLOBAL
// _SCBDEF GLOBAL
// _FRMDEF GLOBAL
// _EXSDEF GLOBAL
// _OSF_A0_DEF GLOBAL
// _MCESDEF GLOBAL
// .sbttl "EV5 symbol definitions"
// _EV5DEF
// _PALTEMP
// _MM_STAT_DEF
// _EV5_MM
// _EV5_IPLDEF
// _HALT_CODES GLOBAL
// _MCHK_CODES GLOBAL
// _PAL_IMPURE
// _PAL_LOGOUT
// .sbttl "PALcode configuration options"
// There are a number of options that may be assembled into this version of
// PALcode. They should be adjusted in a prefix assembly file (i.e. do not edit
// the following). The options that can be adjusted cause the resultant PALcode
// to reflect the desired target system.
#define osfpal 1 // This is the PALcode for OSF.
#ifndef rawhide_system
#define rawhide_system 0
#endif
#ifndef real_mm
// Page table translation vs 1-1 mapping
#define real_mm 1
#endif
#ifndef rax_mode
#define rax_mode 0
#endif
#ifndef egore
// End of reset flow starts a program at 200000(hex).
#define egore 1
#endif
#ifndef acore
// End of reset flow starts a program at 40000(hex).
#define acore 0
#endif
// assume acore+egore+rax_mode lt 2 // Assertion checker
#ifndef beh_model
// EV5 behavioral model specific code
#define beh_model 1
#endif
#ifndef init_cbox
// Reset flow init of Bcache and Scache
#define init_cbox 1
#endif
#ifndef disable_crd
// Decides whether the reset flow will disable
#define disable_crd 0
#endif
// correctable read interrupts via ICSR
#ifndef perfmon_debug
#define perfmon_debug 0
#endif
#ifndef icflush_on_tbix
#define icflush_on_tbix 0
#endif
#ifndef remove_restore_state
#define remove_restore_state 0
#endif
#ifndef remove_save_state
#define remove_save_state 0
#endif
#ifndef enable_physical_console
#define enable_physical_console 0
#endif
#ifndef ev5_p1
#define ev5_p1 0
#endif
#ifndef ev5_p2
#define ev5_p2 1
#endif
// assume ev5_p1+ev5_p2 eq 1
#ifndef ldvpte_bug_fix
#define ldvpte_bug_fix 1 // If set, fix ldvpte bug in dtbmiss_double flow.
#endif
#ifndef spe_fix
// If set, disable super-page mode in user mode and re-enable
#define spe_fix 0
#endif
// in kernel. Workaround for cpu bug.
#ifndef build_fixed_image
#define build_fixed_image 0
#endif
#ifndef fill_err_hack
// If set, disable fill_error mode in user mode and re-enable
#define fill_err_hack 0
#endif
// in kernel. Workaround for cpu bug.
// .macro hw_rei_spe
// .iif eq spe_fix, hw_rei
//#if spe_fix != 0
//
//
//#define hw_rei_chm_count hw_rei_chm_count + 1
// p4_fixup_label \hw_rei_chm_count
// .iif eq build_fixed_image, br r31, hw_rei_update_spe
// .iif ne build_fixed_image, hw_rei
//#endif
//
// .endm
// Add flag "osf_chm_fix" to enable dcache in user mode only
// to avoid cpu bug.
#ifndef osf_chm_fix
// If set, enable D-Cache in
#define osf_chm_fix 0
#endif
#if osf_chm_fix != 0
// user mode only.
#define hw_rei_chm_count 0
#endif
#if osf_chm_fix != 0
#define hw_rei_stall_chm_count 0
#endif
#ifndef enable_p4_fixups
#define enable_p4_fixups 0
#endif
// If set, do EV5 Pass 4 fixups
#if spe_fix == 0
#define osf_chm_fix 0
#endif
#if spe_fix == 0
#define enable_p4_fixups 0
#endif
// Only allow fixups if fix enabled
//Turn off fill_errors and MEM_NEM in user mode
// .macro fill_error_hack ?L10_, ?L20_, ?L30_, ?L40_
// //save r22,r23,r24
// stqp r22, 0x150(r31) //add
// stqp r23, 0x158(r31) //contents
// stqp r24, 0x160(r31) //bit mask
//
// lda r22, 0x82(r31)
// ldah r22, 0x8740(r22)
// sll r22, 8, r22
// ldlp r23, 0x80(r22) // r23 <- contents of CIA_MASK
// bis r23,r31,r23
//
// lda r24, 0x8(r31) // r24 <- MEM_NEM bit
// beq r10, L10_ // IF user mode (r10<0> == 0) pal mode
// bic r23, r24, r23 // set fillerr_en bit
// br r31, L20_ // ELSE
//L10_: bis r23, r24, r23 // clear fillerr_en bit
//L20_: // ENDIF
//
// stlp r23, 0x80(r22) // write back the CIA_MASK register
// mb
// ldlp r23, 0x80(r22)
// bis r23,r31,r23
// mb
//
// lda r22, 1(r31) // r22 <- 87.4000.0100 ptr to CIA_CTRL
// ldah r22, 0x8740(r22)
// sll r22, 8, r22
// ldlp r23, 0(r22) // r23 <- contents of CIA_CTRL
// bis r23,r31,r23
//
//
// lda r24, 0x400(r31) // r9 <- fillerr_en bit
// beq r10, L30_ // IF user mode (r10<0> == 0) pal mode
// bic r23, r24, r23 // set fillerr_en bit
// br r31, L40_ // ELSE
//L30_: bis r23, r24, r23 // clear fillerr_en bit
//L40_: // ENDIF
//
// stlp r23, 0(r22) // write back the CIA_CTRL register
// mb
// ldlp r23, 0(r22)
// bis r23,r31,r23
// mb
//
// //restore r22,r23,r24
// ldqp r22, 0x150(r31)
// ldqp r23, 0x158(r31)
// ldqp r24, 0x160(r31)
//
// .endm
// multiprocessor support can be enabled for a max of n processors by
// setting the following to the number of processors on the system.
// Note that this is really the max cpuid.
#ifndef max_cpuid
#define max_cpuid 8
#endif
#ifndef osf_svmin // platform specific palcode version number
#define osf_svmin 0
#endif
#define osfpal_version_h ((max_cpuid<<16) | (osf_svmin<<0))
// .mcall ldqp // override macro64 definition with macro from library
// .mcall stqp // override macro64 definition with macro from library
// .psect _pal,mix
// huh pb pal_base:
// huh pb #define current_block_base . - pal_base
// .sbttl "RESET - Reset Trap Entry Point"
//+
// RESET - offset 0000
// Entry:
// Vectored into via hardware trap on reset, or branched to
// on swppal.
//
// r0 = whami
// r1 = pal_base
// r2 = base of scratch area
// r3 = halt code
//
//
// Function:
//
//-
.text 0
. = 0x0000
.globl Pal_Base
Pal_Base:
HDW_VECTOR(PAL_RESET_ENTRY)
Trap_Reset:
nop
#ifdef SIMOS
/*
* store into r1
*/
br r1,sys_reset
#else
/* following is a srcmax change */
DEBUGSTORE(0x41)
/* The original code jumped using r1 as a linkage register to pass the base
of PALcode to the platform specific code. We use r1 to pass a parameter
from the SROM, so we hardcode the address of Pal_Base in platform.s
*/
br r31, sys_reset
#endif
// Specify PAL version info as a constant
// at a known location (reset + 8).
.long osfpal_version_l // <pal_type@16> ! <vmaj@8> ! <vmin@0>
.long osfpal_version_h // <max_cpuid@16> ! <osf_svmin@0>
.long 0
.long 0
pal_impure_start:
.quad 0
pal_debug_ptr:
.quad 0 // reserved for debug pointer ; 20
#if beh_model == 0
#if enable_p4_fixups != 0
.quad 0
.long p4_fixup_hw_rei_fixup_table
#endif
#else
.quad 0 //
.quad 0 //0x0030
.quad 0
.quad 0 //0x0040
.quad 0
.quad 0 //0x0050
.quad 0
.quad 0 //0x0060
.quad 0
pal_enter_cns_address:
.quad 0 //0x0070 -- address to jump to from enter_console
.long <<sys_exit_console-pal_base>+1> //0x0078 -- offset to sys_exit_console (set palmode bit)
#endif
// .sbttl "IACCVIO- Istream Access Violation Trap Entry Point"
//+
// IACCVIO - offset 0080
// Entry:
// Vectored into via hardware trap on Istream access violation or sign check error on PC.
//
// Function:
// Build stack frame
// a0 <- Faulting VA
// a1 <- MMCSR (1 for ACV)
// a2 <- -1 (for ifetch fault)
// vector via entMM
//-
HDW_VECTOR(PAL_IACCVIO_ENTRY)
Trap_Iaccvio:
DEBUGSTORE(0x42)
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
bis r11, r31, r12 // Save PS
bge r25, TRAP_IACCVIO_10_ // no stack swap needed if cm=kern
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r30, pt_usp // save user stack
bis r31, r31, r12 // Set new PS
mfpr r30, pt_ksp
TRAP_IACCVIO_10_:
lda sp, 0-osfsf_c_size(sp)// allocate stack space
mfpr r14, exc_addr // get pc
stq r16, osfsf_a0(sp) // save regs
bic r14, 3, r16 // pass pc/va as a0
stq r17, osfsf_a1(sp) // a1
or r31, mmcsr_c_acv, r17 // pass mm_csr as a1
stq r18, osfsf_a2(sp) // a2
mfpr r13, pt_entmm // get entry point
stq r11, osfsf_ps(sp) // save old ps
bis r12, r31, r11 // update ps
stq r16, osfsf_pc(sp) // save pc
stq r29, osfsf_gp(sp) // save gp
mtpr r13, exc_addr // load exc_addr with entMM
// 1 cycle to hw_rei
mfpr r29, pt_kgp // get the kgp
subq r31, 1, r18 // pass flag of istream, as a2
hw_rei_spe
// .sbttl "INTERRUPT- Interrupt Trap Entry Point"
//+
// INTERRUPT - offset 0100
// Entry:
// Vectored into via trap on hardware interrupt
//
// Function:
// check for halt interrupt
// check for passive release (current ipl geq requestor)
// if necessary, switch to kernel mode
// push stack frame, update ps (including current mode and ipl copies), sp, and gp
// pass the interrupt info to the system module
//
//-
HDW_VECTOR(PAL_INTERRUPT_ENTRY)
Trap_Interrupt:
mfpr r13, ev5__intid // Fetch level of interruptor
mfpr r25, ev5__isr // Fetch interrupt summary register
srl r25, isr_v_hlt, r9 // Get HLT bit
mfpr r14, ev5__ipl
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kern
blbs r9, sys_halt_interrupt // halt_interrupt if HLT bit set
cmple r13, r14, r8 // R8 = 1 if intid .less than or eql. ipl
bne r8, sys_passive_release // Passive release is current rupt is lt or eq ipl
and r11, osfps_m_mode, r10 // get mode bit
beq r10, TRAP_INTERRUPT_10_ // Skip stack swap in kernel
mtpr r30, pt_usp // save user stack
mfpr r30, pt_ksp // get kern stack
TRAP_INTERRUPT_10_:
lda sp, (0-osfsf_c_size)(sp)// allocate stack space
mfpr r14, exc_addr // get pc
stq r11, osfsf_ps(sp) // save ps
stq r14, osfsf_pc(sp) // save pc
stq r29, osfsf_gp(sp) // push gp
stq r16, osfsf_a0(sp) // a0
// pvc_violate 354 // ps is cleared anyway, if store to stack faults.
mtpr r31, ev5__ps // Set Ibox current mode to kernel
stq r17, osfsf_a1(sp) // a1
stq r18, osfsf_a2(sp) // a2
subq r13, 0x11, r12 // Start to translate from EV5IPL->OSFIPL
srl r12, 1, r8 // 1d, 1e: ipl 6. 1f: ipl 7.
subq r13, 0x1d, r9 // Check for 1d, 1e, 1f
cmovge r9, r8, r12 // if .ge. 1d, then take shifted value
bis r12, r31, r11 // set new ps
mfpr r12, pt_intmask
and r11, osfps_m_ipl, r14 // Isolate just new ipl (not really needed, since all non-ipl bits zeroed already)
#ifdef SIMOS
/*
* Lance had space problems. We don't.
*/
extbl r12, r14, r14 // Translate new OSFIPL->EV5IPL
mfpr r29, pt_kgp // update gp
mtpr r14, ev5__ipl // load the new IPL into Ibox
#else
// Moved the following three lines to sys_interrupt to make room for debug
// extbl r12, r14, r14 // Translate new OSFIPL->EV5IPL
// mfpr r29, pt_kgp // update gp
// mtpr r14, ev5__ipl // load the new IPL into Ibox
#endif
br r31, sys_interrupt // Go handle interrupt
// .sbttl "ITBMISS- Istream TBmiss Trap Entry Point"
//+
// ITBMISS - offset 0180
// Entry:
// Vectored into via hardware trap on Istream translation buffer miss.
//
// Function:
// Do a virtual fetch of the PTE, and fill the ITB if the PTE is valid.
// Can trap into DTBMISS_DOUBLE.
// This routine can use the PALshadow registers r8, r9, and r10
//
//-
HDW_VECTOR(PAL_ITB_MISS_ENTRY)
Trap_Itbmiss:
#if real_mm == 0
// Simple 1-1 va->pa mapping
nop // Pad to align to E1
mfpr r8, exc_addr
srl r8, page_offset_size_bits, r9
sll r9, 32, r9
lda r9, 0x3301(r9) // Make PTE, V set, all KRE, URE, KWE, UWE
mtpr r9, itb_pte // E1
hw_rei_stall // Nital says I don't have to obey shadow wait rule here.
#else
// Real MM mapping
nop
mfpr r8, ev5__ifault_va_form // Get virtual address of PTE.
nop
mfpr r10, exc_addr // Get PC of faulting instruction in case of DTBmiss.
pal_itb_ldq:
ld_vpte r8, 0(r8) // Get PTE, traps to DTBMISS_DOUBLE in case of TBmiss
mtpr r10, exc_addr // Restore exc_address if there was a trap.
mfpr r31, ev5__va // Unlock VA in case there was a double miss
nop
and r8, osfpte_m_foe, r25 // Look for FOE set.
blbc r8, invalid_ipte_handler // PTE not valid.
nop
bne r25, foe_ipte_handler // FOE is set
nop
mtpr r8, ev5__itb_pte // Ibox remembers the VA, load the PTE into the ITB.
hw_rei_stall //
#endif
// .sbttl "DTBMISS_SINGLE - Dstream Single TBmiss Trap Entry Point"
//+
// DTBMISS_SINGLE - offset 0200
// Entry:
// Vectored into via hardware trap on Dstream single translation buffer miss.
//
// Function:
// Do a virtual fetch of the PTE, and fill the DTB if the PTE is valid.
// Can trap into DTBMISS_DOUBLE.
// This routine can use the PALshadow registers r8, r9, and r10
//-
HDW_VECTOR(PAL_DTB_MISS_ENTRY)
Trap_Dtbmiss_Single:
#if real_mm == 0
// Simple 1-1 va->pa mapping
mfpr r8, va // E0
srl r8, page_offset_size_bits, r9
sll r9, 32, r9
lda r9, 0x3301(r9) // Make PTE, V set, all KRE, URE, KWE, UWE
mtpr r9, dtb_pte // E0
nop // Pad to align to E0
mtpr r8, dtb_tag // E0
nop
nop // Pad tag write
nop
nop // Pad tag write
nop
hw_rei
#else
mfpr r8, ev5__va_form // Get virtual address of PTE - 1 cycle delay. E0.
mfpr r10, exc_addr // Get PC of faulting instruction in case of error. E1.
// DEBUGSTORE(0x45)
// DEBUG_EXC_ADDR()
// Real MM mapping
mfpr r9, ev5__mm_stat // Get read/write bit. E0.
mtpr r10, pt6 // Stash exc_addr away
pal_dtb_ldq:
ld_vpte r8, 0(r8) // Get PTE, traps to DTBMISS_DOUBLE in case of TBmiss
nop // Pad MF VA
mfpr r10, ev5__va // Get original faulting VA for TB load. E0.
nop
mtpr r8, ev5__dtb_pte // Write DTB PTE part. E0.
blbc r8, invalid_dpte_handler // Handle invalid PTE
mtpr r10, ev5__dtb_tag // Write DTB TAG part, completes DTB load. No virt ref for 3 cycles.
mfpr r10, pt6
// Following 2 instructions take 2 cycles
mtpr r10, exc_addr // Return linkage in case we trapped. E1.
mfpr r31, pt0 // Pad the write to dtb_tag
hw_rei // Done, return
#endif
// .sbttl "DTBMISS_DOUBLE - Dstream Double TBmiss Trap Entry Point"
//+
// DTBMISS_DOUBLE - offset 0280
// Entry:
// Vectored into via hardware trap on Double TBmiss from single miss flows.
//
// r8 - faulting VA
// r9 - original MMstat
// r10 - original exc_addr (both itb,dtb miss)
// pt6 - original exc_addr (dtb miss flow only)
// VA IPR - locked with original faulting VA
//
// Function:
// Get PTE, if valid load TB and return.
// If not valid then take TNV/ACV exception.
//
// pt4 and pt5 are reserved for this flow.
//
//
//-
HDW_VECTOR(PAL_DOUBLE_MISS_ENTRY)
Trap_Dtbmiss_double:
#if ldvpte_bug_fix != 0
mtpr r8, pt4 // save r8 to do exc_addr check
mfpr r8, exc_addr
blbc r8, Trap_Dtbmiss_Single //if not in palmode, should be in the single routine, dummy!
mfpr r8, pt4 // restore r8
#endif
nop
mtpr r22, pt5 // Get some scratch space. E1.
// Due to virtual scheme, we can skip the first lookup and go
// right to fetch of level 2 PTE
sll r8, (64-((2*page_seg_size_bits)+page_offset_size_bits)), r22 // Clean off upper bits of VA
mtpr r21, pt4 // Get some scratch space. E1.
srl r22, 61-page_seg_size_bits, r22 // Get Va<seg1>*8
mfpr r21, pt_ptbr // Get physical address of the page table.
nop
addq r21, r22, r21 // Index into page table for level 2 PTE.
sll r8, (64-((1*page_seg_size_bits)+page_offset_size_bits)), r22 // Clean off upper bits of VA
ldqp r21, 0(r21) // Get level 2 PTE (addr<2:0> ignored)
srl r22, 61-page_seg_size_bits, r22 // Get Va<seg1>*8
blbc r21, double_pte_inv // Check for Invalid PTE.
srl r21, 32, r21 // extract PFN from PTE
sll r21, page_offset_size_bits, r21 // get PFN * 2^13 for add to <seg3>*8
addq r21, r22, r21 // Index into page table for level 3 PTE.
nop
ldqp r21, 0(r21) // Get level 3 PTE (addr<2:0> ignored)
blbc r21, double_pte_inv // Check for invalid PTE.
mtpr r21, ev5__dtb_pte // Write the PTE. E0.
mfpr r22, pt5 // Restore scratch register
mtpr r8, ev5__dtb_tag // Write the TAG. E0. No virtual references in subsequent 3 cycles.
mfpr r21, pt4 // Restore scratch register
nop // Pad write to tag.
nop
nop // Pad write to tag.
nop
hw_rei
// .sbttl "UNALIGN -- Dstream unalign trap"
//+
// UNALIGN - offset 0300
// Entry:
// Vectored into via hardware trap on unaligned Dstream reference.
//
// Function:
// Build stack frame
// a0 <- Faulting VA
// a1 <- Opcode
// a2 <- src/dst register number
// vector via entUna
//-
HDW_VECTOR(PAL_UNALIGN_ENTRY)
Trap_Unalign:
/* DEBUGSTORE(0x47)*/
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
mfpr r8, ev5__mm_stat // Get mmstat --ok to use r8, no tbmiss
mfpr r14, exc_addr // get pc
srl r8, mm_stat_v_ra, r13 // Shift Ra field to ls bits
blbs r14, pal_pal_bug_check // Bugcheck if unaligned in PAL
blbs r8, UNALIGN_NO_DISMISS // lsb only set on store or fetch_m
// not set, must be a load
and r13, 0x1F, r8 // isolate ra
cmpeq r8, 0x1F, r8 // check for r31/F31
bne r8, dfault_fetch_ldr31_err // if its a load to r31 or f31 -- dismiss the fault
UNALIGN_NO_DISMISS:
bis r11, r31, r12 // Save PS
bge r25, UNALIGN_NO_DISMISS_10_ // no stack swap needed if cm=kern
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r30, pt_usp // save user stack
bis r31, r31, r12 // Set new PS
mfpr r30, pt_ksp
UNALIGN_NO_DISMISS_10_:
mfpr r25, ev5__va // Unlock VA
lda sp, 0-osfsf_c_size(sp)// allocate stack space
mtpr r25, pt0 // Stash VA
stq r18, osfsf_a2(sp) // a2
stq r11, osfsf_ps(sp) // save old ps
srl r13, mm_stat_v_opcode-mm_stat_v_ra, r25// Isolate opcode
stq r29, osfsf_gp(sp) // save gp
addq r14, 4, r14 // inc PC past the ld/st
stq r17, osfsf_a1(sp) // a1
and r25, mm_stat_m_opcode, r17// Clean opocde for a1
stq r16, osfsf_a0(sp) // save regs
mfpr r16, pt0 // a0 <- va/unlock
stq r14, osfsf_pc(sp) // save pc
mfpr r25, pt_entuna // get entry point
bis r12, r31, r11 // update ps
br r31, unalign_trap_cont
// .sbttl "DFAULT - Dstream Fault Trap Entry Point"
//+
// DFAULT - offset 0380
// Entry:
// Vectored into via hardware trap on dstream fault or sign check error on DVA.
//
// Function:
// Ignore faults on FETCH/FETCH_M
// Check for DFAULT in PAL
// Build stack frame
// a0 <- Faulting VA
// a1 <- MMCSR (1 for ACV, 2 for FOR, 4 for FOW)
// a2 <- R/W
// vector via entMM
//
//-
HDW_VECTOR(PAL_D_FAULT_ENTRY)
Trap_Dfault:
// DEBUGSTORE(0x48)
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
mfpr r13, ev5__mm_stat // Get mmstat
mfpr r8, exc_addr // get pc, preserve r14
srl r13, mm_stat_v_opcode, r9 // Shift opcode field to ls bits
blbs r8, dfault_in_pal
bis r8, r31, r14 // move exc_addr to correct place
bis r11, r31, r12 // Save PS
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
and r9, mm_stat_m_opcode, r9 // Clean all but opcode
cmpeq r9, evx_opc_sync, r9 // Is the opcode fetch/fetchm?
bne r9, dfault_fetch_ldr31_err // Yes, dismiss the fault
//dismiss exception if load to r31/f31
blbs r13, dfault_no_dismiss // mm_stat<0> set on store or fetchm
// not a store or fetch, must be a load
srl r13, mm_stat_v_ra, r9 // Shift rnum to low bits
and r9, 0x1F, r9 // isolate rnum
nop
cmpeq r9, 0x1F, r9 // Is the rnum r31 or f31?
bne r9, dfault_fetch_ldr31_err // Yes, dismiss the fault
dfault_no_dismiss:
and r13, 0xf, r13 // Clean extra bits in mm_stat
bge r25, dfault_trap_cont // no stack swap needed if cm=kern
mtpr r30, pt_usp // save user stack
bis r31, r31, r12 // Set new PS
mfpr r30, pt_ksp
br r31, dfault_trap_cont
// .sbttl "MCHK - Machine Check Trap Entry Point"
//+
// MCHK - offset 0400
// Entry:
// Vectored into via hardware trap on machine check.
//
// Function:
//
//-
HDW_VECTOR(PAL_MCHK_ENTRY)
Trap_Mchk:
DEBUGSTORE(0x49)
mtpr r31, ic_flush_ctl // Flush the Icache
br r31, sys_machine_check
// .sbttl "OPCDEC - Illegal Opcode Trap Entry Point"
//+
// OPCDEC - offset 0480
// Entry:
// Vectored into via hardware trap on illegal opcode.
//
// Build stack frame
// a0 <- code
// a1 <- unpred
// a2 <- unpred
// vector via entIF
//
//-
HDW_VECTOR(PAL_OPCDEC_ENTRY)
Trap_Opcdec:
DEBUGSTORE(0x4a)
//simos DEBUG_EXC_ADDR()
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
mfpr r14, exc_addr // get pc
blbs r14, pal_pal_bug_check // check opcdec in palmode
bis r11, r31, r12 // Save PS
bge r25, TRAP_OPCDEC_10_ // no stack swap needed if cm=kern
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r30, pt_usp // save user stack
bis r31, r31, r12 // Set new PS
mfpr r30, pt_ksp
TRAP_OPCDEC_10_:
lda sp, 0-osfsf_c_size(sp)// allocate stack space
addq r14, 4, r14 // inc pc
stq r16, osfsf_a0(sp) // save regs
bis r31, osf_a0_opdec, r16 // set a0
stq r11, osfsf_ps(sp) // save old ps
mfpr r13, pt_entif // get entry point
stq r18, osfsf_a2(sp) // a2
stq r17, osfsf_a1(sp) // a1
stq r29, osfsf_gp(sp) // save gp
stq r14, osfsf_pc(sp) // save pc
bis r12, r31, r11 // update ps
mtpr r13, exc_addr // load exc_addr with entIF
// 1 cycle to hw_rei, E1
mfpr r29, pt_kgp // get the kgp, E1
hw_rei_spe // done, E1
// .sbttl "ARITH - Arithmetic Exception Trap Entry Point"
//+
// ARITH - offset 0500
// Entry:
// Vectored into via hardware trap on arithmetic excpetion.
//
// Function:
// Build stack frame
// a0 <- exc_sum
// a1 <- exc_mask
// a2 <- unpred
// vector via entArith
//
//-
HDW_VECTOR(PAL_ARITH_ENTRY)
Trap_Arith:
DEBUGSTORE(0x4b)
and r11, osfps_m_mode, r12 // get mode bit
mfpr r31, ev5__va // unlock mbox
bis r11, r31, r25 // save ps
mfpr r14, exc_addr // get pc
nop
blbs r14, pal_pal_bug_check // arith trap from PAL
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
beq r12, TRAP_ARITH_10_ // if zero we are in kern now
bis r31, r31, r25 // set the new ps
mtpr r30, pt_usp // save user stack
nop
mfpr r30, pt_ksp // get kern stack
TRAP_ARITH_10_: lda sp, 0-osfsf_c_size(sp) // allocate stack space
mtpr r31, ev5__ps // Set Ibox current mode to kernel
nop // Pad current mode write and stq
mfpr r13, ev5__exc_sum // get the exc_sum
mfpr r12, pt_entarith
stq r14, osfsf_pc(sp) // save pc
stq r17, osfsf_a1(sp)
mfpr r17, ev5__exc_mask // Get exception register mask IPR - no mtpr exc_sum in next cycle
stq r11, osfsf_ps(sp) // save ps
bis r25, r31, r11 // set new ps
stq r16, osfsf_a0(sp) // save regs
srl r13, exc_sum_v_swc, r16// shift data to correct position
stq r18, osfsf_a2(sp)
// pvc_violate 354 // ok, but make sure reads of exc_mask/sum are not in same trap shadow
mtpr r31, ev5__exc_sum // Unlock exc_sum and exc_mask
stq r29, osfsf_gp(sp)
mtpr r12, exc_addr // Set new PC - 1 bubble to hw_rei - E1
mfpr r29, pt_kgp // get the kern gp - E1
hw_rei_spe // done - E1
// .sbttl "FEN - Illegal Floating Point Operation Trap Entry Point"
//+
// FEN - offset 0580
// Entry:
// Vectored into via hardware trap on illegal FP op.
//
// Function:
// Build stack frame
// a0 <- code
// a1 <- unpred
// a2 <- unpred
// vector via entIF
//
//-
HDW_VECTOR(PAL_FEN_ENTRY)
Trap_Fen:
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
mfpr r14, exc_addr // get pc
blbs r14, pal_pal_bug_check // check opcdec in palmode
mfpr r13, ev5__icsr
nop
bis r11, r31, r12 // Save PS
bge r25, TRAP_FEN_10_ // no stack swap needed if cm=kern
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r30, pt_usp // save user stack
bis r31, r31, r12 // Set new PS
mfpr r30, pt_ksp
TRAP_FEN_10_:
lda sp, 0-osfsf_c_size(sp)// allocate stack space
srl r13, icsr_v_fpe, r25 // Shift FP enable to bit 0
stq r16, osfsf_a0(sp) // save regs
mfpr r13, pt_entif // get entry point
stq r18, osfsf_a2(sp) // a2
stq r11, osfsf_ps(sp) // save old ps
stq r29, osfsf_gp(sp) // save gp
bis r12, r31, r11 // set new ps
stq r17, osfsf_a1(sp) // a1
blbs r25,fen_to_opcdec // If FP is enabled, this is really OPCDEC.
bis r31, osf_a0_fen, r16 // set a0
stq r14, osfsf_pc(sp) // save pc
mtpr r13, exc_addr // load exc_addr with entIF
// 1 cycle to hw_rei -E1
mfpr r29, pt_kgp // get the kgp -E1
hw_rei_spe // done -E1
// FEN trap was taken, but the fault is really opcdec.
ALIGN_BRANCH
fen_to_opcdec:
addq r14, 4, r14 // save PC+4
bis r31, osf_a0_opdec, r16 // set a0
stq r14, osfsf_pc(sp) // save pc
mtpr r13, exc_addr // load exc_addr with entIF
// 1 cycle to hw_rei
mfpr r29, pt_kgp // get the kgp
hw_rei_spe // done
// .sbttl "Misc handlers"
// Start area for misc code.
//+
//dfault_trap_cont
// A dfault trap has been taken. The sp has been updated if necessary.
// Push a stack frame a vector via entMM.
//
// Current state:
// r12 - new PS
// r13 - MMstat
// VA - locked
//
//-
ALIGN_BLOCK
dfault_trap_cont:
lda sp, 0-osfsf_c_size(sp)// allocate stack space
mfpr r25, ev5__va // Fetch VA/unlock
stq r18, osfsf_a2(sp) // a2
and r13, 1, r18 // Clean r/w bit for a2
stq r16, osfsf_a0(sp) // save regs
bis r25, r31, r16 // a0 <- va
stq r17, osfsf_a1(sp) // a1
srl r13, 1, r17 // shift fault bits to right position
stq r11, osfsf_ps(sp) // save old ps
bis r12, r31, r11 // update ps
stq r14, osfsf_pc(sp) // save pc
mfpr r25, pt_entmm // get entry point
stq r29, osfsf_gp(sp) // save gp
cmovlbs r17, 1, r17 // a2. acv overrides fox.
mtpr r25, exc_addr // load exc_addr with entMM
// 1 cycle to hw_rei
mfpr r29, pt_kgp // get the kgp
hw_rei_spe // done
//+
//unalign_trap_cont
// An unalign trap has been taken. Just need to finish up a few things.
//
// Current state:
// r25 - entUna
// r13 - shifted MMstat
//
//-
ALIGN_BLOCK
unalign_trap_cont:
mtpr r25, exc_addr // load exc_addr with entUna
// 1 cycle to hw_rei
mfpr r29, pt_kgp // get the kgp
and r13, mm_stat_m_ra, r18 // Clean Ra for a2
hw_rei_spe // done
//+
// dfault_in_pal
// Dfault trap was taken, exc_addr points to a PAL PC.
// r9 - mmstat<opcode> right justified
// r8 - exception address
//
// These are the cases:
// opcode was STQ -- from a stack builder, KSP not valid halt
// r14 - original exc_addr
// r11 - original PS
// opcode was STL_C -- rti or retsys clear lock_flag by stack write,
// KSP not valid halt
// r11 - original PS
// r14 - original exc_addr
// opcode was LDQ -- retsys or rti stack read, KSP not valid halt
// r11 - original PS
// r14 - original exc_addr
// opcode was HW_LD -- itbmiss or dtbmiss, bugcheck due to fault on page tables
// r10 - original exc_addr
// r11 - original PS
//
//
//-
ALIGN_BLOCK
dfault_in_pal:
DEBUGSTORE(0x50)
bic r8, 3, r8 // Clean PC
mfpr r9, pal_base
mfpr r31, va // unlock VA
#if real_mm != 0
// if not real_mm, should never get here from miss flows
subq r9, r8, r8 // pal_base - offset
lda r9, pal_itb_ldq-pal_base(r8)
nop
beq r9, dfault_do_bugcheck
lda r9, pal_dtb_ldq-pal_base(r8)
beq r9, dfault_do_bugcheck
#endif
//
// KSP invalid halt case --
ksp_inval_halt:
DEBUGSTORE(76)
bic r11, osfps_m_mode, r11 // set ps to kernel mode
mtpr r0, pt0
mtpr r31, dtb_cm // Make sure that the CM IPRs are all kernel mode
mtpr r31, ips
mtpr r14, exc_addr // Set PC to instruction that caused trouble
//orig pvc_jsr updpcb, bsr=1
bsr r0, pal_update_pcb // update the pcb
lda r0, hlt_c_ksp_inval(r31) // set halt code to hw halt
br r31, sys_enter_console // enter the console
ALIGN_BRANCH
dfault_do_bugcheck:
bis r10, r31, r14 // bugcheck expects exc_addr in r14
br r31, pal_pal_bug_check
ALIGN_BLOCK
//+
// dfault_fetch_ldr31_err - ignore faults on fetch(m) and loads to r31/f31
// On entry -
// r14 - exc_addr
// VA is locked
//
//-
dfault_fetch_ldr31_err:
mtpr r11, ev5__dtb_cm
mtpr r11, ev5__ps // Make sure ps hasn't changed
mfpr r31, va // unlock the mbox
addq r14, 4, r14 // inc the pc to skip the fetch
mtpr r14, exc_addr // give ibox new PC
mfpr r31, pt0 // pad exc_addr write
hw_rei
ALIGN_BLOCK
//+
// sys_from_kern
// callsys from kernel mode - OS bugcheck machine check
//
//-
sys_from_kern:
mfpr r14, exc_addr // PC points to call_pal
subq r14, 4, r14
lda r25, mchk_c_os_bugcheck(r31) // fetch mchk code
br r31, pal_pal_mchk
// .sbttl "Continuation of long call_pal flows"
ALIGN_BLOCK
//+
// wrent_tbl
// Table to write *int in paltemps.
// 4 instructions/entry
// r16 has new value
//
//-
wrent_tbl:
//orig pvc_jsr wrent, dest=1
nop
mtpr r16, pt_entint
mfpr r31, pt0 // Pad for mt->mf paltemp rule
hw_rei
//orig pvc_jsr wrent, dest=1
nop
mtpr r16, pt_entarith
mfpr r31, pt0 // Pad for mt->mf paltemp rule
hw_rei
//orig pvc_jsr wrent, dest=1
nop
mtpr r16, pt_entmm
mfpr r31, pt0 // Pad for mt->mf paltemp rule
hw_rei
//orig pvc_jsr wrent, dest=1
nop
mtpr r16, pt_entif
mfpr r31, pt0 // Pad for mt->mf paltemp rule
hw_rei
//orig pvc_jsr wrent, dest=1
nop
mtpr r16, pt_entuna
mfpr r31, pt0 // Pad for mt->mf paltemp rule
hw_rei
//orig pvc_jsr wrent, dest=1
nop
mtpr r16, pt_entsys
mfpr r31, pt0 // Pad for mt->mf paltemp rule
hw_rei
ALIGN_BLOCK
//+
// tbi_tbl
// Table to do tbi instructions
// 4 instructions per entry
//-
tbi_tbl:
// -2 tbia
//orig pvc_jsr tbi, dest=1
mtpr r31, ev5__dtb_ia // Flush DTB
mtpr r31, ev5__itb_ia // Flush ITB
#if icflush_on_tbix != 0
br r31, pal_ic_flush // Flush Icache
#else
hw_rei_stall
#endif
nop // Pad table
// -1 tbiap
//orig pvc_jsr tbi, dest=1
mtpr r31, ev5__dtb_iap // Flush DTB
mtpr r31, ev5__itb_iap // Flush ITB
#if icflush_on_tbix != 0
br r31, pal_ic_flush // Flush Icache
#else
hw_rei_stall
#endif
nop // Pad table
// 0 unused
//orig pvc_jsr tbi, dest=1
hw_rei // Pad table
nop
nop
nop
// 1 tbisi
//orig pvc_jsr tbi, dest=1
#if icflush_on_tbix != 0
nop
br r31, pal_ic_flush_and_tbisi // Flush Icache
nop
nop // Pad table
#else
nop
nop
mtpr r17, ev5__itb_is // Flush ITB
hw_rei_stall
#endif
// 2 tbisd
//orig pvc_jsr tbi, dest=1
mtpr r17, ev5__dtb_is // Flush DTB.
nop
nop
hw_rei_stall
// 3 tbis
//orig pvc_jsr tbi, dest=1
mtpr r17, ev5__dtb_is // Flush DTB
#if icflush_on_tbix != 0
br r31, pal_ic_flush_and_tbisi // Flush Icache and ITB
#else
br r31, tbi_finish
ALIGN_BRANCH
tbi_finish:
mtpr r17, ev5__itb_is // Flush ITB
hw_rei_stall
#endif
ALIGN_BLOCK
//+
// bpt_bchk_common:
// Finish up the bpt/bchk instructions
//-
bpt_bchk_common:
stq r18, osfsf_a2(sp) // a2
mfpr r13, pt_entif // get entry point
stq r12, osfsf_ps(sp) // save old ps
stq r14, osfsf_pc(sp) // save pc
stq r29, osfsf_gp(sp) // save gp
mtpr r13, exc_addr // load exc_addr with entIF
// 1 cycle to hw_rei
mfpr r29, pt_kgp // get the kgp
hw_rei_spe // done
ALIGN_BLOCK
//+
// rti_to_user
// Finish up the rti instruction
//-
rti_to_user:
mtpr r11, ev5__dtb_cm // set Mbox current mode - no virt ref for 2 cycles
mtpr r11, ev5__ps // set Ibox current mode - 2 bubble to hw_rei
mtpr r31, ev5__ipl // set the ipl. No hw_rei for 2 cycles
mtpr r25, pt_ksp // save off incase RTI to user
mfpr r30, pt_usp
hw_rei_spe // and back
ALIGN_BLOCK
//+
// rti_to_kern
// Finish up the rti instruction
//-
rti_to_kern:
and r12, osfps_m_ipl, r11 // clean ps
mfpr r12, pt_intmask // get int mask
extbl r12, r11, r12 // get mask for this ipl
mtpr r25, pt_ksp // save off incase RTI to user
mtpr r12, ev5__ipl // set the new ipl.
or r25, r31, sp // sp
// pvc_violate 217 // possible hidden mt->mf ipl not a problem in callpals
hw_rei
ALIGN_BLOCK
//+
// swpctx_cont
// Finish up the swpctx instruction
//-
swpctx_cont:
#if ev5_p1 != 0
bic r25, r24, r25 // clean icsr<FPE>
get_impure r8 // get impure pointer
sll r12, icsr_v_fpe, r12 // shift new fen to pos
fix_impure_ipr r8 // adjust impure pointer
restore_reg1 pmctr_ctl, r8, r8, ipr=1 // "ldqp" - get pmctr_ctl bits
srl r23, 32, r24 // move asn to low asn pos
ldqp r14, osfpcb_q_mmptr(r16)// get new mmptr
srl r22, osfpcb_v_pme, r22 // get pme down to bit 0
or r25, r12, r25 // icsr with new fen
sll r24, itb_asn_v_asn, r12
#else
bic r25, r24, r25 // clean icsr<FPE,PMP>
sll r12, icsr_v_fpe, r12 // shift new fen to pos
ldqp r14, osfpcb_q_mmptr(r16)// get new mmptr
srl r22, osfpcb_v_pme, r22 // get pme down to bit 0
or r25, r12, r25 // icsr with new fen
srl r23, 32, r24 // move asn to low asn pos
and r22, 1, r22
sll r24, itb_asn_v_asn, r12
sll r22, icsr_v_pmp, r22
nop
or r25, r22, r25 // icsr with new pme
#endif
sll r24, dtb_asn_v_asn, r24
subl r23, r13, r13 // gen new cc offset
mtpr r12, itb_asn // no hw_rei_stall in 0,1,2,3,4
mtpr r24, dtb_asn // Load up new ASN
mtpr r25, icsr // write the icsr
sll r14, page_offset_size_bits, r14 // Move PTBR into internal position.
ldqp r25, osfpcb_q_usp(r16) // get new usp
insll r13, 4, r13 // >> 32
// pvc_violate 379 // ldqp can't trap except replay. only problem if mf same ipr in same shadow
mtpr r14, pt_ptbr // load the new ptbr
mtpr r13, cc // set new offset
ldqp r30, osfpcb_q_ksp(r16) // get new ksp
// pvc_violate 379 // ldqp can't trap except replay. only problem if mf same ipr in same shadow
mtpr r25, pt_usp // save usp
#if ev5_p1 != 0
blbc r8, no_pm_change // if monitoring all processes -- no need to change pm
// otherwise, monitoring select processes - update pm
lda r25, 0x3F(r31)
cmovlbc r22, r31, r8 // if pme set, disable counters, otherwise use saved encodings
sll r25, pmctr_v_ctl2, r25 // create ctl field bit mask
mfpr r22, ev5__pmctr
and r8, r25, r8 // mask new ctl value
bic r22, r25, r22 // clear ctl field in pmctr
or r8, r22, r8
mtpr r8, ev5__pmctr
no_pm_change:
#endif
#if osf_chm_fix != 0
p4_fixup_hw_rei_stall // removes this section for Pass 4 by placing a hw_rei_stall here
#if build_fixed_image != 0
hw_rei_stall
#else
mfpr r9, pt_pcbb // get FEN
#endif
ldqp r9, osfpcb_q_fen(r9)
blbc r9, no_pm_change_10_ // skip if FEN disabled
mb // ensure no outstanding fills
lda r12, 1<<dc_mode_v_dc_ena(r31)
mtpr r12, dc_mode // turn dcache on so we can flush it
nop // force correct slotting
mfpr r31, pt0 // no mbox instructions in 1,2,3,4
mfpr r31, pt0 // no mbox instructions in 1,2,3,4
mfpr r31, pt0 // no mbox instructions in 1,2,3,4
mfpr r31, pt0 // no mbox instructions in 1,2,3,4
lda r8, 0(r31) // flood the dcache with junk data
no_pm_change_5_: ldqp r31, 0(r8)
lda r8, 0x20(r8) // touch each cache block
srl r8, 13, r9
blbc r9, no_pm_change_5_
mb // ensure no outstanding fills
mtpr r31, dc_mode // turn the dcache back off
nop // force correct slotting
mfpr r31, pt0 // no hw_rei_stall in 0,1
#endif
no_pm_change_10_: hw_rei_stall // back we go
ALIGN_BLOCK
//+
// swppal_cont - finish up the swppal call_pal
//-
swppal_cont:
mfpr r2, pt_misc // get misc bits
sll r0, pt_misc_v_switch, r0 // get the "I've switched" bit
or r2, r0, r2 // set the bit
mtpr r31, ev5__alt_mode // ensure alt_mode set to 0 (kernel)
mtpr r2, pt_misc // update the chip
or r3, r31, r4
mfpr r3, pt_impure // pass pointer to the impure area in r3
//orig fix_impure_ipr r3 // adjust impure pointer for ipr read
//orig restore_reg1 bc_ctl, r1, r3, ipr=1 // pass cns_bc_ctl in r1
//orig restore_reg1 bc_config, r2, r3, ipr=1 // pass cns_bc_config in r2
//orig unfix_impure_ipr r3 // restore impure pointer
lda r3, CNS_Q_IPR(r3)
RESTORE_SHADOW(r1,CNS_Q_BC_CTL,r3);
RESTORE_SHADOW(r1,CNS_Q_BC_CFG,r3);
lda r3, -CNS_Q_IPR(r3)
or r31, r31, r0 // set status to success
// pvc_violate 1007
jmp r31, (r4) // and call our friend, it's her problem now
swppal_fail:
addq r0, 1, r0 // set unknown pal or not loaded
hw_rei // and return
// .sbttl "Memory management"
ALIGN_BLOCK
//+
//foe_ipte_handler
// IFOE detected on level 3 pte, sort out FOE vs ACV
//
// on entry:
// with
// R8 = pte
// R10 = pc
//
// Function
// Determine TNV vs ACV vs FOE. Build stack and dispatch
// Will not be here if TNV.
//-
foe_ipte_handler:
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
bis r11, r31, r12 // Save PS for stack write
bge r25, foe_ipte_handler_10_ // no stack swap needed if cm=kern
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r30, pt_usp // save user stack
bis r31, r31, r11 // Set new PS
mfpr r30, pt_ksp
srl r8, osfpte_v_ure-osfpte_v_kre, r8 // move pte user bits to kern
nop
foe_ipte_handler_10_: srl r8, osfpte_v_kre, r25 // get kre to <0>
lda sp, 0-osfsf_c_size(sp)// allocate stack space
or r10, r31, r14 // Save pc/va in case TBmiss or fault on stack
mfpr r13, pt_entmm // get entry point
stq r16, osfsf_a0(sp) // a0
or r14, r31, r16 // pass pc/va as a0
stq r17, osfsf_a1(sp) // a1
nop
stq r18, osfsf_a2(sp) // a2
lda r17, mmcsr_c_acv(r31) // assume ACV
stq r16, osfsf_pc(sp) // save pc
cmovlbs r25, mmcsr_c_foe, r17 // otherwise FOE
stq r12, osfsf_ps(sp) // save ps
subq r31, 1, r18 // pass flag of istream as a2
stq r29, osfsf_gp(sp)
mtpr r13, exc_addr // set vector address
mfpr r29, pt_kgp // load kgp
hw_rei_spe // out to exec
ALIGN_BLOCK
//+
//invalid_ipte_handler
// TNV detected on level 3 pte, sort out TNV vs ACV
//
// on entry:
// with
// R8 = pte
// R10 = pc
//
// Function
// Determine TNV vs ACV. Build stack and dispatch.
//-
invalid_ipte_handler:
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
bis r11, r31, r12 // Save PS for stack write
bge r25, invalid_ipte_handler_10_ // no stack swap needed if cm=kern
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r30, pt_usp // save user stack
bis r31, r31, r11 // Set new PS
mfpr r30, pt_ksp
srl r8, osfpte_v_ure-osfpte_v_kre, r8 // move pte user bits to kern
nop
invalid_ipte_handler_10_: srl r8, osfpte_v_kre, r25 // get kre to <0>
lda sp, 0-osfsf_c_size(sp)// allocate stack space
or r10, r31, r14 // Save pc/va in case TBmiss on stack
mfpr r13, pt_entmm // get entry point
stq r16, osfsf_a0(sp) // a0
or r14, r31, r16 // pass pc/va as a0
stq r17, osfsf_a1(sp) // a1
nop
stq r18, osfsf_a2(sp) // a2
and r25, 1, r17 // Isolate kre
stq r16, osfsf_pc(sp) // save pc
xor r17, 1, r17 // map to acv/tnv as a1
stq r12, osfsf_ps(sp) // save ps
subq r31, 1, r18 // pass flag of istream as a2
stq r29, osfsf_gp(sp)
mtpr r13, exc_addr // set vector address
mfpr r29, pt_kgp // load kgp
hw_rei_spe // out to exec
ALIGN_BLOCK
//+
//invalid_dpte_handler
// INVALID detected on level 3 pte, sort out TNV vs ACV
//
// on entry:
// with
// R10 = va
// R8 = pte
// R9 = mm_stat
// PT6 = pc
//
// Function
// Determine TNV vs ACV. Build stack and dispatch
//-
invalid_dpte_handler:
mfpr r12, pt6
blbs r12, tnv_in_pal // Special handler if original faulting reference was in PALmode
bis r12, r31, r14 // save PC in case of tbmiss or fault
srl r9, mm_stat_v_opcode, r25 // shift opc to <0>
mtpr r11, pt0 // Save PS for stack write
and r25, mm_stat_m_opcode, r25 // isolate opcode
cmpeq r25, evx_opc_sync, r25 // is it FETCH/FETCH_M?
blbs r25, nmiss_fetch_ldr31_err // yes
//dismiss exception if load to r31/f31
blbs r9, invalid_dpte_no_dismiss // mm_stat<0> set on store or fetchm
// not a store or fetch, must be a load
srl r9, mm_stat_v_ra, r25 // Shift rnum to low bits
and r25, 0x1F, r25 // isolate rnum
nop
cmpeq r25, 0x1F, r25 // Is the rnum r31 or f31?
bne r25, nmiss_fetch_ldr31_err // Yes, dismiss the fault
invalid_dpte_no_dismiss:
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
bge r25, invalid_dpte_no_dismiss_10_ // no stack swap needed if cm=kern
srl r8, osfpte_v_ure-osfpte_v_kre, r8 // move pte user bits to kern
mtpr r30, pt_usp // save user stack
bis r31, r31, r11 // Set new PS
mfpr r30, pt_ksp
invalid_dpte_no_dismiss_10_: srl r8, osfpte_v_kre, r12 // get kre to <0>
lda sp, 0-osfsf_c_size(sp)// allocate stack space
or r10, r31, r25 // Save va in case TBmiss on stack
and r9, 1, r13 // save r/w flag
stq r16, osfsf_a0(sp) // a0
or r25, r31, r16 // pass va as a0
stq r17, osfsf_a1(sp) // a1
or r31, mmcsr_c_acv, r17 // assume acv
srl r12, osfpte_v_kwe-osfpte_v_kre, r25 // get write enable to <0>
stq r29, osfsf_gp(sp)
stq r18, osfsf_a2(sp) // a2
cmovlbs r13, r25, r12 // if write access move acv based on write enable
or r13, r31, r18 // pass flag of dstream access and read vs write
mfpr r25, pt0 // get ps
stq r14, osfsf_pc(sp) // save pc
mfpr r13, pt_entmm // get entry point
stq r25, osfsf_ps(sp) // save ps
mtpr r13, exc_addr // set vector address
mfpr r29, pt_kgp // load kgp
cmovlbs r12, mmcsr_c_tnv, r17 // make p2 be tnv if access ok else acv
hw_rei_spe // out to exec
//+
//
// We come here if we are erring on a dtb_miss, and the instr is a
// fetch, fetch_m, of load to r31/f31.
// The PC is incremented, and we return to the program.
// essentially ignoring the instruction and error.
//
//-
ALIGN_BLOCK
nmiss_fetch_ldr31_err:
mfpr r12, pt6
addq r12, 4, r12 // bump pc to pc+4
mtpr r12, exc_addr // and set entry point
mfpr r31, pt0 // pad exc_addr write
hw_rei //
ALIGN_BLOCK
//+
// double_pte_inv
// We had a single tbmiss which turned into a double tbmiss which found
// an invalid PTE. Return to single miss with a fake pte, and the invalid
// single miss flow will report the error.
//
// on entry:
// r21 PTE
// r22 available
// VA IPR locked with original fault VA
// pt4 saved r21
// pt5 saved r22
// pt6 original exc_addr
//
// on return to tbmiss flow:
// r8 fake PTE
//
//
//-
double_pte_inv:
srl r21, osfpte_v_kre, r21 // get the kre bit to <0>
mfpr r22, exc_addr // get the pc
lda r22, 4(r22) // inc the pc
lda r8, osfpte_m_prot(r31) // make a fake pte with xre and xwe set
cmovlbc r21, r31, r8 // set to all 0 for acv if pte<kre> is 0
mtpr r22, exc_addr // set for rei
mfpr r21, pt4 // restore regs
mfpr r22, pt5 // restore regs
hw_rei // back to tb miss
ALIGN_BLOCK
//+
//tnv_in_pal
// The only places in pal that ld or store are the
// stack builders, rti or retsys. Any of these mean we
// need to take a ksp not valid halt.
//
//-
tnv_in_pal:
br r31, ksp_inval_halt
// .sbttl "Icache flush routines"
ALIGN_BLOCK
//+
// Common Icache flush routine.
//
//
//-
pal_ic_flush:
nop
mtpr r31, ev5__ic_flush_ctl // Icache flush - E1
nop
nop
// Now, do 44 NOPs. 3RFB prefetches (24) + IC buffer,IB,slot,issue (20)
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop // 10
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop // 20
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop // 30
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop // 40
nop
nop
one_cycle_and_hw_rei:
nop
nop
hw_rei_stall
#if icflush_on_tbix != 0
ALIGN_BLOCK
//+
// Common Icache flush and ITB invalidate single routine.
// ITBIS and hw_rei_stall must be in same octaword.
// r17 - has address to invalidate
//
//-
PAL_IC_FLUSH_AND_TBISI:
nop
mtpr r31, ev5__ic_flush_ctl // Icache flush - E1
nop
nop
// Now, do 44 NOPs. 3RFB prefetches (24) + IC buffer,IB,slot,issue (20)
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop // 10
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop // 20
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop // 30
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop // 40
nop
nop
nop
nop
// A quadword is 64 bits, so an octaword is 128 bits -> 16 bytes -> 4 instructions
// 44 nops plus 4 instructions before it is 48 instructions.
// Since this routine started on a 32-byte (8 instruction) boundary,
// the following 2 instructions will be in the same octword as required.
// ALIGN_BRANCH
mtpr r17, ev5__itb_is // Flush ITB
hw_rei_stall
#endif
ALIGN_BLOCK
//+
//osfpal_calpal_opcdec
// Here for all opcdec CALL_PALs
//
// Build stack frame
// a0 <- code
// a1 <- unpred
// a2 <- unpred
// vector via entIF
//
//-
osfpal_calpal_opcdec:
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
mfpr r14, exc_addr // get pc
nop
bis r11, r31, r12 // Save PS for stack write
bge r25, osfpal_calpal_opcdec_10_ // no stack swap needed if cm=kern
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r30, pt_usp // save user stack
bis r31, r31, r11 // Set new PS
mfpr r30, pt_ksp
osfpal_calpal_opcdec_10_:
lda sp, 0-osfsf_c_size(sp)// allocate stack space
nop
stq r16, osfsf_a0(sp) // save regs
bis r31, osf_a0_opdec, r16 // set a0
stq r18, osfsf_a2(sp) // a2
mfpr r13, pt_entif // get entry point
stq r12, osfsf_ps(sp) // save old ps
stq r17, osfsf_a1(sp) // a1
stq r14, osfsf_pc(sp) // save pc
nop
stq r29, osfsf_gp(sp) // save gp
mtpr r13, exc_addr // load exc_addr with entIF
// 1 cycle to hw_rei
mfpr r29, pt_kgp // get the kgp
hw_rei_spe // done
//+
//pal_update_pcb
// Update the PCB with the current SP, AST, and CC info
//
// r0 - return linkage
//-
ALIGN_BLOCK
pal_update_pcb:
mfpr r12, pt_pcbb // get pcbb
and r11, osfps_m_mode, r25 // get mode
beq r25, pal_update_pcb_10_ // in kern? no need to update user sp
mtpr r30, pt_usp // save user stack
stqp r30, osfpcb_q_usp(r12) // store usp
br r31, pal_update_pcb_20_ // join common
pal_update_pcb_10_: stqp r30, osfpcb_q_ksp(r12) // store ksp
pal_update_pcb_20_: rpcc r13 // get cyccounter
srl r13, 32, r14 // move offset
addl r13, r14, r14 // merge for new time
stlp r14, osfpcb_l_cc(r12) // save time
//orig pvc_jsr updpcb, bsr=1, dest=1
ret r31, (r0)
#if remove_save_state == 0
// .sbttl "PAL_SAVE_STATE"
//+
//
// Pal_save_state
//
// Function
// All chip state saved, all PT's, SR's FR's, IPR's
//
//
// Regs' on entry...
//
// R0 = halt code
// pt0 = r0
// R1 = pointer to impure
// pt4 = r1
// R3 = return addr
// pt5 = r3
//
// register usage:
// r0 = halt_code
// r1 = addr of impure area
// r3 = return_address
// r4 = scratch
//
//-
ALIGN_BLOCK
.globl pal_save_state
pal_save_state:
//
//
// start of implementation independent save routine
//
// the impure area is larger than the addressibility of hw_ld and hw_st
// therefore, we need to play some games: The impure area
// is informally divided into the "machine independent" part and the
// "machine dependent" part. The state that will be saved in the
// "machine independent" part are gpr's, fpr's, hlt, flag, mchkflag (use (un)fix_impure_gpr macros).
// All others will be in the "machine dependent" part (use (un)fix_impure_ipr macros).
// The impure pointer will need to be adjusted by a different offset for each. The store/restore_reg
// macros will automagically adjust the offset correctly.
//
// The distributed code is commented out and followed by corresponding SRC code.
// Beware: SAVE_IPR and RESTORE_IPR blow away r0(v0)
//orig fix_impure_gpr r1 // adjust impure area pointer for stores to "gpr" part of impure area
lda r1, 0x200(r1) // Point to center of CPU segment
//orig store_reg1 flag, r31, r1, ipr=1 // clear dump area flag
SAVE_GPR(r31,CNS_Q_FLAG,r1) // Clear the valid flag
//orig store_reg1 hlt, r0, r1, ipr=1
SAVE_GPR(r0,CNS_Q_HALT,r1) // Save the halt code
mfpr r0, pt0 // get r0 back //orig
//orig store_reg1 0, r0, r1 // save r0
SAVE_GPR(r0,CNS_Q_GPR+0x00,r1) // Save r0
mfpr r0, pt4 // get r1 back //orig
//orig store_reg1 1, r0, r1 // save r1
SAVE_GPR(r0,CNS_Q_GPR+0x08,r1) // Save r1
//orig store_reg 2 // save r2
SAVE_GPR(r2,CNS_Q_GPR+0x10,r1) // Save r2
mfpr r0, pt5 // get r3 back //orig
//orig store_reg1 3, r0, r1 // save r3
SAVE_GPR(r0,CNS_Q_GPR+0x18,r1) // Save r3
// reason code has been saved
// r0 has been saved
// r1 has been saved
// r2 has been saved
// r3 has been saved
// pt0, pt4, pt5 have been lost
//
// Get out of shadow mode
//
mfpr r2, icsr // Get icsr //orig
//orig ldah r0, <1@<icsr_v_sde-16>>(r31) // Get a one in SHADOW_ENABLE bit location
ldah r0, (1<<(icsr_v_sde-16))(r31)
bic r2, r0, r0 // ICSR with SDE clear //orig
mtpr r0, icsr // Turn off SDE //orig
mfpr r31, pt0 // SDE bubble cycle 1 //orig
mfpr r31, pt0 // SDE bubble cycle 2 //orig
mfpr r31, pt0 // SDE bubble cycle 3 //orig
nop //orig
// save integer regs R4-r31
//orig #define t 4
//orig .repeat 28
//orig store_reg \t
//orig #define t t + 1
//orig .endr
SAVE_GPR(r4,CNS_Q_GPR+0x20,r1)
SAVE_GPR(r5,CNS_Q_GPR+0x28,r1)
SAVE_GPR(r6,CNS_Q_GPR+0x30,r1)
SAVE_GPR(r7,CNS_Q_GPR+0x38,r1)
SAVE_GPR(r8,CNS_Q_GPR+0x40,r1)
SAVE_GPR(r9,CNS_Q_GPR+0x48,r1)
SAVE_GPR(r10,CNS_Q_GPR+0x50,r1)
SAVE_GPR(r11,CNS_Q_GPR+0x58,r1)
SAVE_GPR(r12,CNS_Q_GPR+0x60,r1)
SAVE_GPR(r13,CNS_Q_GPR+0x68,r1)
SAVE_GPR(r14,CNS_Q_GPR+0x70,r1)
SAVE_GPR(r15,CNS_Q_GPR+0x78,r1)
SAVE_GPR(r16,CNS_Q_GPR+0x80,r1)
SAVE_GPR(r17,CNS_Q_GPR+0x88,r1)
SAVE_GPR(r18,CNS_Q_GPR+0x90,r1)
SAVE_GPR(r19,CNS_Q_GPR+0x98,r1)
SAVE_GPR(r20,CNS_Q_GPR+0xA0,r1)
SAVE_GPR(r21,CNS_Q_GPR+0xA8,r1)
SAVE_GPR(r22,CNS_Q_GPR+0xB0,r1)
SAVE_GPR(r23,CNS_Q_GPR+0xB8,r1)
SAVE_GPR(r24,CNS_Q_GPR+0xC0,r1)
SAVE_GPR(r25,CNS_Q_GPR+0xC8,r1)
SAVE_GPR(r26,CNS_Q_GPR+0xD0,r1)
SAVE_GPR(r27,CNS_Q_GPR+0xD8,r1)
SAVE_GPR(r28,CNS_Q_GPR+0xE0,r1)
SAVE_GPR(r29,CNS_Q_GPR+0xE8,r1)
SAVE_GPR(r30,CNS_Q_GPR+0xF0,r1)
SAVE_GPR(r31,CNS_Q_GPR+0xF8,r1)
// save all paltemp regs except pt0
//orig unfix_impure_gpr r1 // adjust impure area pointer for gpr stores
//orig fix_impure_ipr r1 // adjust impure area pointer for pt stores
//orig #define t 1
//orig .repeat 23
//orig store_reg \t , pal=1
//orig #define t t + 1
//orig .endr
lda r1, -0x200(r1) // Restore the impure base address.
lda r1, CNS_Q_IPR(r1) // Point to the base of IPR area.
SAVE_IPR(pt0,CNS_Q_PT+0x00,r1) // the osf code didn't save/restore palTemp 0 ?? pboyle
SAVE_IPR(pt1,CNS_Q_PT+0x08,r1)
SAVE_IPR(pt2,CNS_Q_PT+0x10,r1)
SAVE_IPR(pt3,CNS_Q_PT+0x18,r1)
SAVE_IPR(pt4,CNS_Q_PT+0x20,r1)
SAVE_IPR(pt5,CNS_Q_PT+0x28,r1)
SAVE_IPR(pt6,CNS_Q_PT+0x30,r1)
SAVE_IPR(pt7,CNS_Q_PT+0x38,r1)
SAVE_IPR(pt8,CNS_Q_PT+0x40,r1)
SAVE_IPR(pt9,CNS_Q_PT+0x48,r1)
SAVE_IPR(pt10,CNS_Q_PT+0x50,r1)
SAVE_IPR(pt11,CNS_Q_PT+0x58,r1)
SAVE_IPR(pt12,CNS_Q_PT+0x60,r1)
SAVE_IPR(pt13,CNS_Q_PT+0x68,r1)
SAVE_IPR(pt14,CNS_Q_PT+0x70,r1)
SAVE_IPR(pt15,CNS_Q_PT+0x78,r1)
SAVE_IPR(pt16,CNS_Q_PT+0x80,r1)
SAVE_IPR(pt17,CNS_Q_PT+0x88,r1)
SAVE_IPR(pt18,CNS_Q_PT+0x90,r1)
SAVE_IPR(pt19,CNS_Q_PT+0x98,r1)
SAVE_IPR(pt20,CNS_Q_PT+0xA0,r1)
SAVE_IPR(pt21,CNS_Q_PT+0xA8,r1)
SAVE_IPR(pt22,CNS_Q_PT+0xB0,r1)
SAVE_IPR(pt23,CNS_Q_PT+0xB8,r1)
// Restore shadow mode
mfpr r31, pt0 // pad write to icsr out of shadow of store (trap does not abort write) //orig
mfpr r31, pt0 //orig
mtpr r2, icsr // Restore original ICSR //orig
mfpr r31, pt0 // SDE bubble cycle 1 //orig
mfpr r31, pt0 // SDE bubble cycle 2 //orig
mfpr r31, pt0 // SDE bubble cycle 3 //orig
nop //orig
// save all integer shadow regs
//orig #define t 8
//orig .repeat 7
//orig store_reg \t, shadow=1
//orig #define t t + 1
//orig .endr
//orig store_reg 25, shadow=1
SAVE_SHADOW( r8,CNS_Q_SHADOW+0x00,r1) // also called p0...p7 in the Hudson code
SAVE_SHADOW( r9,CNS_Q_SHADOW+0x08,r1)
SAVE_SHADOW(r10,CNS_Q_SHADOW+0x10,r1)
SAVE_SHADOW(r11,CNS_Q_SHADOW+0x18,r1)
SAVE_SHADOW(r12,CNS_Q_SHADOW+0x20,r1)
SAVE_SHADOW(r13,CNS_Q_SHADOW+0x28,r1)
SAVE_SHADOW(r14,CNS_Q_SHADOW+0x30,r1)
SAVE_SHADOW(r25,CNS_Q_SHADOW+0x38,r1)
//orig store_reg exc_addr, ipr=1 // save ipr
//orig store_reg pal_base, ipr=1 // save ipr
//orig store_reg mm_stat, ipr=1 // save ipr
//orig store_reg va, ipr=1 // save ipr
//orig store_reg icsr, ipr=1 // save ipr
//orig store_reg ipl, ipr=1 // save ipr
//orig store_reg ps, ipr=1 // save ipr
//orig store_reg itb_asn, ipr=1 // save ipr
//orig store_reg aster, ipr=1 // save ipr
//orig store_reg astrr, ipr=1 // save ipr
//orig store_reg sirr, ipr=1 // save ipr
//orig store_reg isr, ipr=1 // save ipr
//orig store_reg ivptbr, ipr=1 // save ipr
//orig store_reg mcsr, ipr=1 // save ipr
//orig store_reg dc_mode, ipr=1 // save ipr
SAVE_IPR(excAddr,CNS_Q_EXC_ADDR,r1)
SAVE_IPR(palBase,CNS_Q_PAL_BASE,r1)
SAVE_IPR(mmStat,CNS_Q_MM_STAT,r1)
SAVE_IPR(va,CNS_Q_VA,r1)
SAVE_IPR(icsr,CNS_Q_ICSR,r1)
SAVE_IPR(ipl,CNS_Q_IPL,r1)
SAVE_IPR(ips,CNS_Q_IPS,r1)
SAVE_IPR(itbAsn,CNS_Q_ITB_ASN,r1)
SAVE_IPR(aster,CNS_Q_ASTER,r1)
SAVE_IPR(astrr,CNS_Q_ASTRR,r1)
SAVE_IPR(sirr,CNS_Q_SIRR,r1)
SAVE_IPR(isr,CNS_Q_ISR,r1)
SAVE_IPR(iVptBr,CNS_Q_IVPTBR,r1)
SAVE_IPR(mcsr,CNS_Q_MCSR,r1)
SAVE_IPR(dcMode,CNS_Q_DC_MODE,r1)
//orig pvc_violate 379 // mf maf_mode after a store ok (pvc doesn't distinguish ld from st)
//orig store_reg maf_mode, ipr=1 // save ipr -- no mbox instructions for
//orig // PVC violation applies only to
pvc$osf35$379: // loads. HW_ST ok here, so ignore
SAVE_IPR(mafMode,CNS_Q_MAF_MODE,r1) // MBOX INST->MF MAF_MODE IN 0,1,2
//the following iprs are informational only -- will not be restored
//orig store_reg icperr_stat, ipr=1
//orig store_reg pmctr, ipr=1
//orig store_reg intid, ipr=1
//orig store_reg exc_sum, ipr=1
//orig store_reg exc_mask, ipr=1
//orig ldah r14, 0xfff0(r31)
//orig zap r14, 0xE0, r14 // Get Cbox IPR base
//orig nop // pad mf dcperr_stat out of shadow of last store
//orig nop
//orig nop
//orig store_reg dcperr_stat, ipr=1
SAVE_IPR(icPerr,CNS_Q_ICPERR_STAT,r1)
SAVE_IPR(PmCtr,CNS_Q_PM_CTR,r1)
SAVE_IPR(intId,CNS_Q_INT_ID,r1)
SAVE_IPR(excSum,CNS_Q_EXC_SUM,r1)
SAVE_IPR(excMask,CNS_Q_EXC_MASK,r1)
ldah r14, 0xFFF0(zero)
zap r14, 0xE0, r14 // Get base address of CBOX IPRs
NOP // Pad mfpr dcPerr out of shadow of
NOP // last store
NOP
SAVE_IPR(dcPerr,CNS_Q_DCPERR_STAT,r1)
// read cbox ipr state
//orig mb
//orig ldqp r2, ev5__sc_ctl(r14)
//orig ldqp r13, ld_lock(r14)
//orig ldqp r4, ev5__sc_addr(r14)
//orig ldqp r5, ev5__ei_addr(r14)
//orig ldqp r6, ev5__bc_tag_addr(r14)
//orig ldqp r7, ev5__fill_syn(r14)
//orig bis r5, r4, r31
//orig bis r7, r6, r31 // make sure previous loads finish before reading stat registers which unlock them
//orig ldqp r8, ev5__sc_stat(r14) // unlocks sc_stat,sc_addr
//orig ldqp r9, ev5__ei_stat(r14) // may unlock ei_*, bc_tag_addr, fill_syn
//orig ldqp r31, ev5__ei_stat(r14) // ensures it is really unlocked
//orig mb
#ifndef SIMOS
mb
ldq_p r2, scCtl(r14)
ldq_p r13, ldLock(r14)
ldq_p r4, scAddr(r14)
ldq_p r5, eiAddr(r14)
ldq_p r6, bcTagAddr(r14)
ldq_p r7, fillSyn(r14)
bis r5, r4, zero // Make sure all loads complete before
bis r7, r6, zero // reading registers that unlock them.
ldq_p r8, scStat(r14) // Unlocks scAddr.
ldq_p r9, eiStat(r14) // Unlocks eiAddr, bcTagAddr, fillSyn.
ldq_p zero, eiStat(r14) // Make sure it is really unlocked.
mb
#endif
//orig // save cbox ipr state
//orig store_reg1 sc_ctl, r2, r1, ipr=1
//orig store_reg1 ld_lock, r13, r1, ipr=1
//orig store_reg1 sc_addr, r4, r1, ipr=1
//orig store_reg1 ei_addr, r5, r1, ipr=1
//orig store_reg1 bc_tag_addr, r6, r1, ipr=1
//orig store_reg1 fill_syn, r7, r1, ipr=1
//orig store_reg1 sc_stat, r8, r1, ipr=1
//orig store_reg1 ei_stat, r9, r1, ipr=1
//orig //bc_config? sl_rcv?
SAVE_SHADOW(r2,CNS_Q_SC_CTL,r1);
SAVE_SHADOW(r13,CNS_Q_LD_LOCK,r1);
SAVE_SHADOW(r4,CNS_Q_SC_ADDR,r1);
SAVE_SHADOW(r5,CNS_Q_EI_ADDR,r1);
SAVE_SHADOW(r6,CNS_Q_BC_TAG_ADDR,r1);
SAVE_SHADOW(r7,CNS_Q_FILL_SYN,r1);
SAVE_SHADOW(r8,CNS_Q_SC_STAT,r1);
SAVE_SHADOW(r9,CNS_Q_EI_STAT,r1);
// restore impure base //orig
//orig unfix_impure_ipr r1
lda r1, -CNS_Q_IPR(r1)
// save all floating regs //orig
mfpr r0, icsr // get icsr //orig
or r31, 1, r2 // get a one //orig
//orig sll r2, #icsr_v_fpe, r2 // shift for fpu spot //orig
sll r2, icsr_v_fpe, r2 // Shift it into ICSR<FPE> position
or r2, r0, r0 // set FEN on //orig
mtpr r0, icsr // write to icsr, enabling FEN //orig
// map the save area virtually
// orig mtpr r31, dtb_ia // clear the dtb
// orig srl r1, page_offset_size_bits, r0 // Clean off low bits of VA
// orig sll r0, 32, r0 // shift to PFN field
// orig lda r2, 0xff(r31) // all read enable and write enable bits set
// orig sll r2, 8, r2 // move to PTE location
// orig addq r0, r2, r0 // combine with PFN
// orig mtpr r0, dtb_pte // Load PTE and set TB valid bit
// orig mtpr r1, dtb_tag // write TB tag
mtpr r31, dtbIa // Clear all DTB entries
srl r1, va_s_off, r0 // Clean off byte-within-page offset
sll r0, pte_v_pfn, r0 // Shift to form PFN
lda r0, pte_m_prot(r0) // Set all read/write enable bits
mtpr r0, dtbPte // Load the PTE and set valid
mtpr r1, dtbTag // Write the PTE and tag into the DTB
//orig // map the next page too - in case the impure area crosses a page boundary
//orig lda r4, 1@page_offset_size_bits(r1) // generate address for next page
//orig srl r4, page_offset_size_bits, r0 // Clean off low bits of VA
//orig sll r0, 32, r0 // shift to PFN field
//orig lda r2, 0xff(r31) // all read enable and write enable bits set
//orig sll r2, 8, r2 // move to PTE location
//orig addq r0, r2, r0 // combine with PFN
//orig mtpr r0, dtb_pte // Load PTE and set TB valid bit
//orig mtpr r4, dtb_tag // write TB tag
lda r4, (1<<va_s_off)(r1) // Generate address for next page
srl r4, va_s_off, r0 // Clean off byte-within-page offset
sll r0, pte_v_pfn, r0 // Shift to form PFN
lda r0, pte_m_prot(r0) // Set all read/write enable bits
mtpr r0, dtbPte // Load the PTE and set valid
mtpr r4, dtbTag // Write the PTE and tag into the DTB
sll r31, 0, r31 // stall cycle 1 // orig
sll r31, 0, r31 // stall cycle 2 // orig
sll r31, 0, r31 // stall cycle 3 // orig
nop // orig
//orig // add offset for saving fpr regs
//orig fix_impure_gpr r1
lda r1, 0x200(r1) // Point to center of CPU segment
// now save the regs - F0-F31
//orig #define t 0
//orig .repeat 32
//orig store_reg \t , fpu=1
//orig #define t t + 1
//orig .endr
mf_fpcr f0 // original
SAVE_FPR(f0,CNS_Q_FPR+0x00,r1)
SAVE_FPR(f1,CNS_Q_FPR+0x08,r1)
SAVE_FPR(f2,CNS_Q_FPR+0x10,r1)
SAVE_FPR(f3,CNS_Q_FPR+0x18,r1)
SAVE_FPR(f4,CNS_Q_FPR+0x20,r1)
SAVE_FPR(f5,CNS_Q_FPR+0x28,r1)
SAVE_FPR(f6,CNS_Q_FPR+0x30,r1)
SAVE_FPR(f7,CNS_Q_FPR+0x38,r1)
SAVE_FPR(f8,CNS_Q_FPR+0x40,r1)
SAVE_FPR(f9,CNS_Q_FPR+0x48,r1)
SAVE_FPR(f10,CNS_Q_FPR+0x50,r1)
SAVE_FPR(f11,CNS_Q_FPR+0x58,r1)
SAVE_FPR(f12,CNS_Q_FPR+0x60,r1)
SAVE_FPR(f13,CNS_Q_FPR+0x68,r1)
SAVE_FPR(f14,CNS_Q_FPR+0x70,r1)
SAVE_FPR(f15,CNS_Q_FPR+0x78,r1)
SAVE_FPR(f16,CNS_Q_FPR+0x80,r1)
SAVE_FPR(f17,CNS_Q_FPR+0x88,r1)
SAVE_FPR(f18,CNS_Q_FPR+0x90,r1)
SAVE_FPR(f19,CNS_Q_FPR+0x98,r1)
SAVE_FPR(f20,CNS_Q_FPR+0xA0,r1)
SAVE_FPR(f21,CNS_Q_FPR+0xA8,r1)
SAVE_FPR(f22,CNS_Q_FPR+0xB0,r1)
SAVE_FPR(f23,CNS_Q_FPR+0xB8,r1)
SAVE_FPR(f24,CNS_Q_FPR+0xC0,r1)
SAVE_FPR(f25,CNS_Q_FPR+0xC8,r1)
SAVE_FPR(f26,CNS_Q_FPR+0xD0,r1)
SAVE_FPR(f27,CNS_Q_FPR+0xD8,r1)
SAVE_FPR(f28,CNS_Q_FPR+0xE0,r1)
SAVE_FPR(f29,CNS_Q_FPR+0xE8,r1)
SAVE_FPR(f30,CNS_Q_FPR+0xF0,r1)
SAVE_FPR(f31,CNS_Q_FPR+0xF8,r1)
//orig //switch impure offset from gpr to ipr---
//orig unfix_impure_gpr r1
//orig fix_impure_ipr r1
//orig store_reg1 fpcsr, f0, r1, fpcsr=1
SAVE_FPR(f0,CNS_Q_FPCSR,r1) // fpcsr loaded above into f0 -- can it reach// pb
lda r1, -0x200(r1) // Restore the impure base address
//orig // and back to gpr ---
//orig unfix_impure_ipr r1
//orig fix_impure_gpr r1
//orig lda r0, cns_mchksize(r31) // get size of mchk area
//orig store_reg1 mchkflag, r0, r1, ipr=1
//orig mb
lda r1, CNS_Q_IPR(r1) // Point to base of IPR area again
// save this using the IPR base (it is closer) not the GRP base as they used...pb
lda r0, MACHINE_CHECK_SIZE(r31) // get size of mchk area
SAVE_SHADOW(r0,CNS_Q_MCHK,r1);
mb
//orig or r31, 1, r0 // get a one
//orig store_reg1 flag, r0, r1, ipr=1 // set dump area flag
//orig mb
lda r1, -CNS_Q_IPR(r1) // back to the base
lda r1, 0x200(r1) // Point to center of CPU segment
or r31, 1, r0 // get a one
SAVE_GPR(r0,CNS_Q_FLAG,r1) // // set dump area valid flag
mb
//orig // restore impure area base
//orig unfix_impure_gpr r1
lda r1, -0x200(r1) // Point to center of CPU segment
mtpr r31, dtb_ia // clear the dtb //orig
mtpr r31, itb_ia // clear the itb //orig
//orig pvc_jsr savsta, bsr=1, dest=1
ret r31, (r3) // and back we go
#endif
#if remove_restore_state == 0
// .sbttl "PAL_RESTORE_STATE"
//+
//
// Pal_restore_state
//
//
// register usage:
// r1 = addr of impure area
// r3 = return_address
// all other regs are scratchable, as they are about to
// be reloaded from ram.
//
// Function:
// All chip state restored, all SRs, FRs, PTs, IPRs
// *** except R1, R3, PT0, PT4, PT5 ***
//
//-
ALIGN_BLOCK
pal_restore_state:
//need to restore sc_ctl,bc_ctl,bc_config??? if so, need to figure out a safe way to do so.
//orig // map the console io area virtually
//orig mtpr r31, dtb_ia // clear the dtb
//orig srl r1, page_offset_size_bits, r0 // Clean off low bits of VA
//orig sll r0, 32, r0 // shift to PFN field
//orig lda r2, 0xff(r31) // all read enable and write enable bits set
//orig sll r2, 8, r2 // move to PTE location
//orig addq r0, r2, r0 // combine with PFN
//orig
//orig mtpr r0, dtb_pte // Load PTE and set TB valid bit
//orig mtpr r1, dtb_tag // write TB tag
//orig
mtpr r31, dtbIa // Clear all DTB entries
srl r1, va_s_off, r0 // Clean off byte-within-page offset
sll r0, pte_v_pfn, r0 // Shift to form PFN
lda r0, pte_m_prot(r0) // Set all read/write enable bits
mtpr r0, dtbPte // Load the PTE and set valid
mtpr r1, dtbTag // Write the PTE and tag into the DTB
//orig // map the next page too, in case impure area crosses page boundary
//orig lda r4, 1@page_offset_size_bits(r1) // generate address for next page
//orig srl r4, page_offset_size_bits, r0 // Clean off low bits of VA
//orig sll r0, 32, r0 // shift to PFN field
//orig lda r2, 0xff(r31) // all read enable and write enable bits set
//orig sll r2, 8, r2 // move to PTE location
//orig addq r0, r2, r0 // combine with PFN
//orig
//orig mtpr r0, dtb_pte // Load PTE and set TB valid bit
//orig mtpr r4, dtb_tag // write TB tag - no virtual mbox instruction for 3 cycles
lda r4, (1<<VA_S_OFF)(r1) // Generate address for next page
srl r4, va_s_off, r0 // Clean off byte-within-page offset
sll r0, pte_v_pfn, r0 // Shift to form PFN
lda r0, pte_m_prot(r0) // Set all read/write enable bits
mtpr r0, dtbPte // Load the PTE and set valid
mtpr r4, dtbTag // Write the PTE and tag into the DTB
//orig // save all floating regs
//orig mfpr r0, icsr // get icsr
//orig// assume ICSR_V_SDE gt <ICSR_V_FPE> // assertion checker
//orig or r31, <<1@<ICSR_V_SDE-ICSR_V_FPE>> ! 1>, r2 // set SDE and FPE
//orig sll r2, #icsr_v_fpe, r2 // shift for fpu spot
//orig or r2, r0, r0 // set FEN on
//orig mtpr r0, icsr // write to icsr, enabling FEN and SDE. 3 bubbles to floating instr.
mfpr r0, icsr // Get current ICSR
bis zero, 1, r2 // Get a '1'
or r2, (1<<(icsr_v_sde-icsr_v_fpe)), r2
sll r2, icsr_v_fpe, r2 // Shift bits into position
bis r2, r2, r0 // Set ICSR<SDE> and ICSR<FPE>
mtpr r0, icsr // Update the chip
mfpr r31, pt0 // FPE bubble cycle 1 //orig
mfpr r31, pt0 // FPE bubble cycle 2 //orig
mfpr r31, pt0 // FPE bubble cycle 3 //orig
//orig fix_impure_ipr r1
//orig restore_reg1 fpcsr, f0, r1, fpcsr=1
//orig mt_fpcr f0
//orig
//orig unfix_impure_ipr r1
//orig fix_impure_gpr r1 // adjust impure pointer offset for gpr access
//orig
//orig // restore all floating regs
//orig#define t 0
//orig .repeat 32
//orig restore_reg \t , fpu=1
//orig#define t t + 1
//orig .endr
lda r1, 200(r1) // Point to base of IPR area again
RESTORE_FPR(f0,CNS_Q_FPCSR,r1) // can it reach?? pb
mt_fpcr f0 // original
lda r1, 0x200(r1) // point to center of CPU segment
RESTORE_FPR(f0,CNS_Q_FPR+0x00,r1)
RESTORE_FPR(f1,CNS_Q_FPR+0x08,r1)
RESTORE_FPR(f2,CNS_Q_FPR+0x10,r1)
RESTORE_FPR(f3,CNS_Q_FPR+0x18,r1)
RESTORE_FPR(f4,CNS_Q_FPR+0x20,r1)
RESTORE_FPR(f5,CNS_Q_FPR+0x28,r1)
RESTORE_FPR(f6,CNS_Q_FPR+0x30,r1)
RESTORE_FPR(f7,CNS_Q_FPR+0x38,r1)
RESTORE_FPR(f8,CNS_Q_FPR+0x40,r1)
RESTORE_FPR(f9,CNS_Q_FPR+0x48,r1)
RESTORE_FPR(f10,CNS_Q_FPR+0x50,r1)
RESTORE_FPR(f11,CNS_Q_FPR+0x58,r1)
RESTORE_FPR(f12,CNS_Q_FPR+0x60,r1)
RESTORE_FPR(f13,CNS_Q_FPR+0x68,r1)
RESTORE_FPR(f14,CNS_Q_FPR+0x70,r1)
RESTORE_FPR(f15,CNS_Q_FPR+0x78,r1)
RESTORE_FPR(f16,CNS_Q_FPR+0x80,r1)
RESTORE_FPR(f17,CNS_Q_FPR+0x88,r1)
RESTORE_FPR(f18,CNS_Q_FPR+0x90,r1)
RESTORE_FPR(f19,CNS_Q_FPR+0x98,r1)
RESTORE_FPR(f20,CNS_Q_FPR+0xA0,r1)
RESTORE_FPR(f21,CNS_Q_FPR+0xA8,r1)
RESTORE_FPR(f22,CNS_Q_FPR+0xB0,r1)
RESTORE_FPR(f23,CNS_Q_FPR+0xB8,r1)
RESTORE_FPR(f24,CNS_Q_FPR+0xC0,r1)
RESTORE_FPR(f25,CNS_Q_FPR+0xC8,r1)
RESTORE_FPR(f26,CNS_Q_FPR+0xD0,r1)
RESTORE_FPR(f27,CNS_Q_FPR+0xD8,r1)
RESTORE_FPR(f28,CNS_Q_FPR+0xE0,r1)
RESTORE_FPR(f29,CNS_Q_FPR+0xE8,r1)
RESTORE_FPR(f30,CNS_Q_FPR+0xF0,r1)
RESTORE_FPR(f31,CNS_Q_FPR+0xF8,r1)
//orig // switch impure pointer from gpr to ipr area --
//orig unfix_impure_gpr r1
//orig fix_impure_ipr r1
//orig
//orig // restore all pal regs
//orig#define t 1
//orig .repeat 23
//orig restore_reg \t , pal=1
//orig#define t t + 1
//orig .endr
lda r1, -0x200(r1) // Restore base address of impure area.
lda r1, CNS_Q_IPR(r1) // Point to base of IPR area.
RESTORE_IPR(pt0,CNS_Q_PT+0x00,r1) // the osf code didn't save/restore palTemp 0 ?? pboyle
RESTORE_IPR(pt1,CNS_Q_PT+0x08,r1)
RESTORE_IPR(pt2,CNS_Q_PT+0x10,r1)
RESTORE_IPR(pt3,CNS_Q_PT+0x18,r1)
RESTORE_IPR(pt4,CNS_Q_PT+0x20,r1)
RESTORE_IPR(pt5,CNS_Q_PT+0x28,r1)
RESTORE_IPR(pt6,CNS_Q_PT+0x30,r1)
RESTORE_IPR(pt7,CNS_Q_PT+0x38,r1)
RESTORE_IPR(pt8,CNS_Q_PT+0x40,r1)
RESTORE_IPR(pt9,CNS_Q_PT+0x48,r1)
RESTORE_IPR(pt10,CNS_Q_PT+0x50,r1)
RESTORE_IPR(pt11,CNS_Q_PT+0x58,r1)
RESTORE_IPR(pt12,CNS_Q_PT+0x60,r1)
RESTORE_IPR(pt13,CNS_Q_PT+0x68,r1)
RESTORE_IPR(pt14,CNS_Q_PT+0x70,r1)
RESTORE_IPR(pt15,CNS_Q_PT+0x78,r1)
RESTORE_IPR(pt16,CNS_Q_PT+0x80,r1)
RESTORE_IPR(pt17,CNS_Q_PT+0x88,r1)
RESTORE_IPR(pt18,CNS_Q_PT+0x90,r1)
RESTORE_IPR(pt19,CNS_Q_PT+0x98,r1)
RESTORE_IPR(pt20,CNS_Q_PT+0xA0,r1)
RESTORE_IPR(pt21,CNS_Q_PT+0xA8,r1)
RESTORE_IPR(pt22,CNS_Q_PT+0xB0,r1)
RESTORE_IPR(pt23,CNS_Q_PT+0xB8,r1)
//orig restore_reg exc_addr, ipr=1 // restore ipr
//orig restore_reg pal_base, ipr=1 // restore ipr
//orig restore_reg ipl, ipr=1 // restore ipr
//orig restore_reg ps, ipr=1 // restore ipr
//orig mtpr r0, dtb_cm // set current mode in mbox too
//orig restore_reg itb_asn, ipr=1
//orig srl r0, itb_asn_v_asn, r0
//orig sll r0, dtb_asn_v_asn, r0
//orig mtpr r0, dtb_asn // set ASN in Mbox too
//orig restore_reg ivptbr, ipr=1
//orig mtpr r0, mvptbr // use ivptbr value to restore mvptbr
//orig restore_reg mcsr, ipr=1
//orig restore_reg aster, ipr=1
//orig restore_reg astrr, ipr=1
//orig restore_reg sirr, ipr=1
//orig restore_reg maf_mode, ipr=1 // no mbox instruction for 3 cycles
//orig mfpr r31, pt0 // (may issue with mt maf_mode)
//orig mfpr r31, pt0 // bubble cycle 1
//orig mfpr r31, pt0 // bubble cycle 2
//orig mfpr r31, pt0 // bubble cycle 3
//orig mfpr r31, pt0 // (may issue with following ld)
// r0 gets the value of RESTORE_IPR in the macro and this code uses this side effect (gag)
RESTORE_IPR(excAddr,CNS_Q_EXC_ADDR,r1)
RESTORE_IPR(palBase,CNS_Q_PAL_BASE,r1)
RESTORE_IPR(ipl,CNS_Q_IPL,r1)
RESTORE_IPR(ips,CNS_Q_IPS,r1)
mtpr r0, dtbCm // Set Mbox current mode too.
RESTORE_IPR(itbAsn,CNS_Q_ITB_ASN,r1)
srl r0, 4, r0
sll r0, 57, r0
mtpr r0, dtbAsn // Set Mbox ASN too
RESTORE_IPR(iVptBr,CNS_Q_IVPTBR,r1)
mtpr r0, mVptBr // Set Mbox VptBr too
RESTORE_IPR(mcsr,CNS_Q_MCSR,r1)
RESTORE_IPR(aster,CNS_Q_ASTER,r1)
RESTORE_IPR(astrr,CNS_Q_ASTRR,r1)
RESTORE_IPR(sirr,CNS_Q_SIRR,r1)
RESTORE_IPR(mafMode,CNS_Q_MAF_MODE,r1)
STALL
STALL
STALL
STALL
STALL
// restore all integer shadow regs
//orig#define t 8
//orig .repeat 7
//orig restore_reg \t, shadow=1
//orig#define t t + 1
//orig .endr
//orig restore_reg 25, shadow=1
//orig restore_reg dc_mode, ipr=1 // no mbox instructions for 4 cycles
RESTORE_SHADOW( r8,CNS_Q_SHADOW+0x00,r1) // also called p0...p7 in the Hudson code
RESTORE_SHADOW( r9,CNS_Q_SHADOW+0x08,r1)
RESTORE_SHADOW(r10,CNS_Q_SHADOW+0x10,r1)
RESTORE_SHADOW(r11,CNS_Q_SHADOW+0x18,r1)
RESTORE_SHADOW(r12,CNS_Q_SHADOW+0x20,r1)
RESTORE_SHADOW(r13,CNS_Q_SHADOW+0x28,r1)
RESTORE_SHADOW(r14,CNS_Q_SHADOW+0x30,r1)
RESTORE_SHADOW(r25,CNS_Q_SHADOW+0x38,r1)
RESTORE_IPR(dcMode,CNS_Q_DC_MODE,r1)
//
// Get out of shadow mode
//
mfpr r31, pt0 // pad last load to icsr write (in case of replay, icsr will be written anyway) //orig
mfpr r31, pt0 // "" //orig
mfpr r0, icsr // Get icsr //orig
//orig ldah r2, <1@<icsr_v_sde-16>>(r31) // Get a one in SHADOW_ENABLE bit location
ldah r2, (1<<(ICSR_V_SDE-16))(r31) // Get a one in SHADOW_ENABLE bit location //orig
bic r0, r2, r2 // ICSR with SDE clear //orig
mtpr r2, icsr // Turn off SDE - no palshadow rd/wr for 3 bubble cycles //orig
mfpr r31, pt0 // SDE bubble cycle 1 //orig
mfpr r31, pt0 // SDE bubble cycle 2 //orig
mfpr r31, pt0 // SDE bubble cycle 3 //orig
nop //orig
//orig // switch impure pointer from ipr to gpr area --
//orig unfix_impure_ipr r1
//orig fix_impure_gpr r1
//orig // restore all integer regs
//orig#define t 4
//orig .repeat 28
//orig restore_reg \t
//orig#define t t + 1
//orig .endr
// Restore GPRs (r0, r2 are restored later, r1 and r3 are trashed) ...
lda r1, -CNS_Q_IPR(r1) // Restore base address of impure area
lda r1, 0x200(r1) // Point to center of CPU segment
RESTORE_GPR(r4,CNS_Q_GPR+0x20,r1)
RESTORE_GPR(r5,CNS_Q_GPR+0x28,r1)
RESTORE_GPR(r6,CNS_Q_GPR+0x30,r1)
RESTORE_GPR(r7,CNS_Q_GPR+0x38,r1)
RESTORE_GPR(r8,CNS_Q_GPR+0x40,r1)
RESTORE_GPR(r9,CNS_Q_GPR+0x48,r1)
RESTORE_GPR(r10,CNS_Q_GPR+0x50,r1)
RESTORE_GPR(r11,CNS_Q_GPR+0x58,r1)
RESTORE_GPR(r12,CNS_Q_GPR+0x60,r1)
RESTORE_GPR(r13,CNS_Q_GPR+0x68,r1)
RESTORE_GPR(r14,CNS_Q_GPR+0x70,r1)
RESTORE_GPR(r15,CNS_Q_GPR+0x78,r1)
RESTORE_GPR(r16,CNS_Q_GPR+0x80,r1)
RESTORE_GPR(r17,CNS_Q_GPR+0x88,r1)
RESTORE_GPR(r18,CNS_Q_GPR+0x90,r1)
RESTORE_GPR(r19,CNS_Q_GPR+0x98,r1)
RESTORE_GPR(r20,CNS_Q_GPR+0xA0,r1)
RESTORE_GPR(r21,CNS_Q_GPR+0xA8,r1)
RESTORE_GPR(r22,CNS_Q_GPR+0xB0,r1)
RESTORE_GPR(r23,CNS_Q_GPR+0xB8,r1)
RESTORE_GPR(r24,CNS_Q_GPR+0xC0,r1)
RESTORE_GPR(r25,CNS_Q_GPR+0xC8,r1)
RESTORE_GPR(r26,CNS_Q_GPR+0xD0,r1)
RESTORE_GPR(r27,CNS_Q_GPR+0xD8,r1)
RESTORE_GPR(r28,CNS_Q_GPR+0xE0,r1)
RESTORE_GPR(r29,CNS_Q_GPR+0xE8,r1)
RESTORE_GPR(r30,CNS_Q_GPR+0xF0,r1)
RESTORE_GPR(r31,CNS_Q_GPR+0xF8,r1)
//orig // switch impure pointer from gpr to ipr area --
//orig unfix_impure_gpr r1
//orig fix_impure_ipr r1
//orig restore_reg icsr, ipr=1 // restore original icsr- 4 bubbles to hw_rei
lda t0, -0x200(t0) // Restore base address of impure area.
lda t0, CNS_Q_IPR(t0) // Point to base of IPR area again.
RESTORE_IPR(icsr,CNS_Q_ICSR,r1)
//orig // and back again --
//orig unfix_impure_ipr r1
//orig fix_impure_gpr r1
//orig store_reg1 flag, r31, r1, ipr=1 // clear dump area valid flag
//orig mb
lda t0, -CNS_Q_IPR(t0) // Back to base of impure area again,
lda t0, 0x200(t0) // and back to center of CPU segment
SAVE_GPR(r31,CNS_Q_FLAG,r1) // Clear the dump area valid flag
mb
//orig // and back we go
//orig// restore_reg 3
//orig restore_reg 2
//orig// restore_reg 1
//orig restore_reg 0
//orig // restore impure area base
//orig unfix_impure_gpr r1
RESTORE_GPR(r2,CNS_Q_GPR+0x10,r1)
RESTORE_GPR(r0,CNS_Q_GPR+0x00,r1)
lda r1, -0x200(r1) // Restore impure base address
mfpr r31, pt0 // stall for ldqp above //orig
mtpr r31, dtb_ia // clear the tb //orig
mtpr r31, itb_ia // clear the itb //orig
//orig pvc_jsr rststa, bsr=1, dest=1
ret r31, (r3) // back we go //orig
#endif
//+
// pal_pal_bug_check -- code has found a bugcheck situation.
// Set things up and join common machine check flow.
//
// Input:
// r14 - exc_addr
//
// On exit:
// pt0 - saved r0
// pt1 - saved r1
// pt4 - saved r4
// pt5 - saved r5
// pt6 - saved r6
// pt10 - saved exc_addr
// pt_misc<47:32> - mchk code
// pt_misc<31:16> - scb vector
// r14 - base of Cbox IPRs in IO space
// MCES<mchk> is set
//-
ALIGN_BLOCK
.globl pal_pal_bug_check_from_int
pal_pal_bug_check_from_int:
DEBUGSTORE(0x79)
//simos DEBUG_EXC_ADDR()
DEBUGSTORE(0x20)
//simos bsr r25, put_hex
lda r25, mchk_c_bugcheck(r31)
addq r25, 1, r25 // set flag indicating we came from interrupt and stack is already pushed
br r31, pal_pal_mchk
nop
pal_pal_bug_check:
lda r25, mchk_c_bugcheck(r31)
pal_pal_mchk:
sll r25, 32, r25 // Move mchk code to position
mtpr r14, pt10 // Stash exc_addr
mtpr r14, exc_addr
mfpr r12, pt_misc // Get MCES and scratch
zap r12, 0x3c, r12
or r12, r25, r12 // Combine mchk code
lda r25, scb_v_procmchk(r31) // Get SCB vector
sll r25, 16, r25 // Move SCBv to position
or r12, r25, r25 // Combine SCBv
mtpr r0, pt0 // Stash for scratch
bis r25, mces_m_mchk, r25 // Set MCES<MCHK> bit
mtpr r25, pt_misc // Save mchk code!scbv!whami!mces
ldah r14, 0xfff0(r31)
mtpr r1, pt1 // Stash for scratch
zap r14, 0xE0, r14 // Get Cbox IPR base
mtpr r4, pt4
mtpr r5, pt5
mtpr r6, pt6
blbs r12, sys_double_machine_check // MCHK halt if double machine check
br r31, sys_mchk_collect_iprs // Join common machine check flow
// align_to_call_pal_section // Align to address of first call_pal entry point - 2000
// .sbttl "HALT - PALcode for HALT instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// GO to console code
//
//-
.text 1
// . = 0x2000
CALL_PAL_PRIV(PAL_HALT_ENTRY)
call_pal_halt:
#if rax_mode == 0
mfpr r31, pt0 // Pad exc_addr read
mfpr r31, pt0
mfpr r12, exc_addr // get PC
subq r12, 4, r12 // Point to the HALT
mtpr r12, exc_addr
mtpr r0, pt0
//orig pvc_jsr updpcb, bsr=1
bsr r0, pal_update_pcb // update the pcb
lda r0, hlt_c_sw_halt(r31) // set halt code to sw halt
br r31, sys_enter_console // enter the console
#else // RAX mode
mb
mb
mtpr r9, ev5__dtb_asn // no Dstream virtual ref for next 3 cycles.
mtpr r9, ev5__itb_asn // E1. Update ITB ASN. No hw_rei for 5 cycles.
mtpr r8, exc_addr // no HW_REI for 1 cycle.
blbc r9, not_begin_case
mtpr r31, ev5__dtb_ia // clear DTB. No Dstream virtual ref for 2 cycles.
mtpr r31, ev5__itb_ia // clear ITB.
not_begin_case:
nop
nop
nop
nop // pad mt itb_asn ->hw_rei_stall
hw_rei_stall
#endif
// .sbttl "CFLUSH- PALcode for CFLUSH instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// R16 - contains the PFN of the page to be flushed
//
// Function:
// Flush all Dstream caches of 1 entire page
// The CFLUSH routine is in the system specific module.
//
//-
CALL_PAL_PRIV(PAL_CFLUSH_ENTRY)
Call_Pal_Cflush:
br r31, sys_cflush
// .sbttl "DRAINA - PALcode for DRAINA instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
// Implicit TRAPB performed by hardware.
//
// Function:
// Stall instruction issue until all prior instructions are guaranteed to
// complete without incurring aborts. For the EV5 implementation, this
// means waiting until all pending DREADS are returned.
//
//-
CALL_PAL_PRIV(PAL_DRAINA_ENTRY)
Call_Pal_Draina:
ldah r14, 0x100(r31) // Init counter. Value?
nop
DRAINA_LOOP:
subq r14, 1, r14 // Decrement counter
mfpr r13, ev5__maf_mode // Fetch status bit
srl r13, maf_mode_v_dread_pending, r13
ble r14, DRAINA_LOOP_TOO_LONG
nop
blbs r13, DRAINA_LOOP // Wait until all DREADS clear
hw_rei
DRAINA_LOOP_TOO_LONG:
br r31, call_pal_halt
// .sbttl "CALL_PAL OPCDECs"
CALL_PAL_PRIV(0x0003)
CallPal_OpcDec03:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0004)
CallPal_OpcDec04:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0005)
CallPal_OpcDec05:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0006)
CallPal_OpcDec06:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0007)
CallPal_OpcDec07:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0008)
CallPal_OpcDec08:
br r31, osfpal_calpal_opcdec
// .sbttl "CSERVE- PALcode for CSERVE instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// Various functions for private use of console software
//
// option selector in r0
// arguments in r16....
// The CSERVE routine is in the system specific module.
//
//-
CALL_PAL_PRIV(PAL_CSERVE_ENTRY)
Call_Pal_Cserve:
br r31, sys_cserve
// .sbttl "swppal - PALcode for swppal instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
// Vectored into via hardware PALcode instruction dispatch.
// R16 contains the new PAL identifier
// R17:R21 contain implementation-specific entry parameters
//
// R0 receives status:
// 0 success (PAL was switched)
// 1 unknown PAL variant
// 2 known PAL variant, but PAL not loaded
//
//
// Function:
// Swap control to another PAL.
//-
CALL_PAL_PRIV(PAL_SWPPAL_ENTRY)
Call_Pal_Swppal:
cmpule r16, 255, r0 // see if a kibble was passed
cmoveq r16, r16, r0 // if r16=0 then a valid address (ECO 59)
or r16, r31, r3 // set r3 incase this is a address
blbc r0, swppal_cont // nope, try it as an address
cmpeq r16, 2, r0 // is it our friend OSF?
blbc r0, swppal_fail // nope, don't know this fellow
br r2, CALL_PAL_SWPPAL_10_ // tis our buddy OSF
// .global osfpal_hw_entry_reset
// .weak osfpal_hw_entry_reset
// .long <osfpal_hw_entry_reset-pal_start>
//orig halt // don't know how to get the address here - kludge ok, load pal at 0
.long 0 // ?? hack upon hack...pb
CALL_PAL_SWPPAL_10_: ldlp r3, 0(r2) // fetch target addr
// ble r3, swppal_fail ; if OSF not linked in say not loaded.
mfpr r2, pal_base // fetch pal base
addq r2, r3, r3 // add pal base
lda r2, 0x3FFF(r31) // get pal base checker mask
and r3, r2, r2 // any funky bits set?
cmpeq r2, 0, r0 //
blbc r0, swppal_fail // return unknown if bad bit set.
br r31, swppal_cont
// .sbttl "CALL_PAL OPCDECs"
CALL_PAL_PRIV(0x000B)
CallPal_OpcDec0B:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x000C)
CallPal_OpcDec0C:
br r31, osfpal_calpal_opcdec
// .sbttl "wripir- PALcode for wripir instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
// r16 = processor number to interrupt
//
// Function:
// IPIR <- R16
// Handled in system-specific code
//
// Exit:
// interprocessor interrupt is recorded on the target processor
// and is initiated when the proper enabling conditions are present.
//-
CALL_PAL_PRIV(PAL_WRIPIR_ENTRY)
Call_Pal_Wrpir:
br r31, sys_wripir
// .sbttl "CALL_PAL OPCDECs"
CALL_PAL_PRIV(0x000E)
CallPal_OpcDec0E:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x000F)
CallPal_OpcDec0F:
br r31, osfpal_calpal_opcdec
// .sbttl "rdmces- PALcode for rdmces instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// R0 <- ZEXT(MCES)
//-
CALL_PAL_PRIV(PAL_RDMCES_ENTRY)
Call_Pal_Rdmces:
mfpr r0, pt_mces // Read from PALtemp
and r0, mces_m_all, r0 // Clear other bits
hw_rei
// .sbttl "wrmces- PALcode for wrmces instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// If {R16<0> EQ 1} then MCES<0> <- 0 (MCHK)
// If {R16<1> EQ 1} then MCES<1> <- 0 (SCE)
// If {R16<2> EQ 1} then MCES<2> <- 0 (PCE)
// MCES<3> <- R16<3> (DPC)
// MCES<4> <- R16<4> (DSC)
//
//-
CALL_PAL_PRIV(PAL_WRMCES_ENTRY)
Call_Pal_Wrmces:
and r16, ((1<<mces_v_mchk) | (1<<mces_v_sce) | (1<<mces_v_pce)), r13 // Isolate MCHK, SCE, PCE
mfpr r14, pt_mces // Get current value
ornot r31, r13, r13 // Flip all the bits
and r16, ((1<<mces_v_dpc) | (1<<mces_v_dsc)), r17
and r14, r13, r1 // Update MCHK, SCE, PCE
bic r1, ((1<<mces_v_dpc) | (1<<mces_v_dsc)), r1 // Clear old DPC, DSC
or r1, r17, r1 // Update DPC and DSC
mtpr r1, pt_mces // Write MCES back
#if rawhide_system == 0
nop // Pad to fix PT write->read restriction
#else
blbs r16, RAWHIDE_clear_mchk_lock // Clear logout from lock
#endif
nop
hw_rei
// .sbttl "CALL_PAL OPCDECs"
CALL_PAL_PRIV(0x0012)
CallPal_OpcDec12:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0013)
CallPal_OpcDec13:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0014)
CallPal_OpcDec14:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0015)
CallPal_OpcDec15:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0016)
CallPal_OpcDec16:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0017)
CallPal_OpcDec17:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0018)
CallPal_OpcDec18:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0019)
CallPal_OpcDec19:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x001A)
CallPal_OpcDec1A:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x001B)
CallPal_OpcDec1B:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x001C)
CallPal_OpcDec1C:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x001D)
CallPal_OpcDec1D:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x001E)
CallPal_OpcDec1E:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x001F)
CallPal_OpcDec1F:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0020)
CallPal_OpcDec20:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0021)
CallPal_OpcDec21:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0022)
CallPal_OpcDec22:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0023)
CallPal_OpcDec23:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0024)
CallPal_OpcDec24:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0025)
CallPal_OpcDec25:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0026)
CallPal_OpcDec26:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0027)
CallPal_OpcDec27:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0028)
CallPal_OpcDec28:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x0029)
CallPal_OpcDec29:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x002A)
CallPal_OpcDec2A:
br r31, osfpal_calpal_opcdec
// .sbttl "wrfen - PALcode for wrfen instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// a0<0> -> ICSR<FPE>
// Store new FEN in PCB
// Final value of t0 (r1), t8..t10 (r22..r24) and a0 (r16) are UNPREDICTABLE
//
// Issue: What about pending FP loads when FEN goes from on->off????
//-
CALL_PAL_PRIV(PAL_WRFEN_ENTRY)
Call_Pal_Wrfen:
or r31, 1, r13 // Get a one
mfpr r1, ev5__icsr // Get current FPE
sll r13, icsr_v_fpe, r13 // shift 1 to icsr<fpe> spot, e0
and r16, 1, r16 // clean new fen
sll r16, icsr_v_fpe, r12 // shift new fen to correct bit position
bic r1, r13, r1 // zero icsr<fpe>
or r1, r12, r1 // Or new FEN into ICSR
mfpr r12, pt_pcbb // Get PCBB - E1
mtpr r1, ev5__icsr // write new ICSR. 3 Bubble cycles to HW_REI
stlp r16, osfpcb_q_fen(r12) // Store FEN in PCB.
mfpr r31, pt0 // Pad ICSR<FPE> write.
mfpr r31, pt0
mfpr r31, pt0
// pvc_violate 225 // cuz PVC can't distinguish which bits changed
hw_rei
CALL_PAL_PRIV(0x002C)
CallPal_OpcDec2C:
br r31, osfpal_calpal_opcdec
// .sbttl "wrvptpr - PALcode for wrvptpr instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// vptptr <- a0 (r16)
//-
CALL_PAL_PRIV(PAL_WRVPTPTR_ENTRY)
Call_Pal_Wrvptptr:
mtpr r16, ev5__mvptbr // Load Mbox copy
mtpr r16, ev5__ivptbr // Load Ibox copy
nop // Pad IPR write
nop
hw_rei
CALL_PAL_PRIV(0x002E)
CallPal_OpcDec2E:
br r31, osfpal_calpal_opcdec
CALL_PAL_PRIV(0x002F)
CallPal_OpcDec2F:
br r31, osfpal_calpal_opcdec
// .sbttl "swpctx- PALcode for swpctx instruction"
//+
//
// Entry:
// hardware dispatch via callPal instruction
// R16 -> new pcb
//
// Function:
// dynamic state moved to old pcb
// new state loaded from new pcb
// pcbb pointer set
// old pcbb returned in R0
//
// Note: need to add perf monitor stuff
//-
CALL_PAL_PRIV(PAL_SWPCTX_ENTRY)
Call_Pal_Swpctx:
rpcc r13 // get cyccounter
mfpr r0, pt_pcbb // get pcbb
ldqp r22, osfpcb_q_fen(r16) // get new fen/pme
ldqp r23, osfpcb_l_cc(r16) // get new asn
srl r13, 32, r25 // move offset
mfpr r24, pt_usp // get usp
stqp r30, osfpcb_q_ksp(r0) // store old ksp
// pvc_violate 379 // stqp can't trap except replay. only problem if mf same ipr in same shadow.
mtpr r16, pt_pcbb // set new pcbb
stqp r24, osfpcb_q_usp(r0) // store usp
addl r13, r25, r25 // merge for new time
stlp r25, osfpcb_l_cc(r0) // save time
ldah r24, (1<<(icsr_v_fpe-16))(r31)
and r22, 1, r12 // isolate fen
mfpr r25, icsr // get current icsr
ev5_pass2 lda r24, (1<<icsr_v_pmp)(r24)
br r31, swpctx_cont
// .sbttl "wrval - PALcode for wrval instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// sysvalue <- a0 (r16)
//-
CALL_PAL_PRIV(PAL_WRVAL_ENTRY)
Call_Pal_Wrval:
nop
mtpr r16, pt_sysval // Pad paltemp write
nop
nop
hw_rei
// .sbttl "rdval - PALcode for rdval instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// v0 (r0) <- sysvalue
//-
CALL_PAL_PRIV(PAL_RDVAL_ENTRY)
Call_Pal_Rdval:
nop
mfpr r0, pt_sysval
nop
hw_rei
// .sbttl "tbi - PALcode for tbi instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// TB invalidate
// r16/a0 = TBI type
// r17/a1 = Va for TBISx instructions
//-
CALL_PAL_PRIV(PAL_TBI_ENTRY)
Call_Pal_Tbi:
addq r16, 2, r16 // change range to 0-2
br r23, CALL_PAL_tbi_10_ // get our address
CALL_PAL_tbi_10_: cmpult r16, 6, r22 // see if in range
lda r23, tbi_tbl-CALL_PAL_tbi_10_(r23) // set base to start of table
sll r16, 4, r16 // * 16
blbc r22, CALL_PAL_tbi_30_ // go rei, if not
addq r23, r16, r23 // addr of our code
//orig pvc_jsr tbi
jmp r31, (r23) // and go do it
CALL_PAL_tbi_30_:
hw_rei
nop
// .sbttl "wrent - PALcode for wrent instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// Update ent* in paltemps
// r16/a0 = Address of entry routine
// r17/a1 = Entry Number 0..5
//
// r22, r23 trashed
//-
CALL_PAL_PRIV(PAL_WRENT_ENTRY)
Call_Pal_Wrent:
cmpult r17, 6, r22 // see if in range
br r23, CALL_PAL_wrent_10_ // get our address
CALL_PAL_wrent_10_: bic r16, 3, r16 // clean pc
blbc r22, CALL_PAL_wrent_30_ // go rei, if not in range
lda r23, wrent_tbl-CALL_PAL_wrent_10_(r23) // set base to start of table
sll r17, 4, r17 // *16
addq r17, r23, r23 // Get address in table
//orig pvc_jsr wrent
jmp r31, (r23) // and go do it
CALL_PAL_wrent_30_:
hw_rei // out of range, just return
// .sbttl "swpipl - PALcode for swpipl instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// v0 (r0) <- PS<IPL>
// PS<IPL> <- a0<2:0> (r16)
//
// t8 (r22) is scratch
//-
CALL_PAL_PRIV(PAL_SWPIPL_ENTRY)
Call_Pal_Swpipl:
and r16, osfps_m_ipl, r16 // clean New ipl
mfpr r22, pt_intmask // get int mask
extbl r22, r16, r22 // get mask for this ipl
bis r11, r31, r0 // return old ipl
bis r16, r31, r11 // set new ps
mtpr r22, ev5__ipl // set new mask
mfpr r31, pt0 // pad ipl write
mfpr r31, pt0 // pad ipl write
hw_rei // back
// .sbttl "rdps - PALcode for rdps instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// v0 (r0) <- ps
//-
CALL_PAL_PRIV(PAL_RDPS_ENTRY)
Call_Pal_Rdps:
bis r11, r31, r0 // Fetch PALshadow PS
nop // Must be 2 cycles long
hw_rei
// .sbttl "wrkgp - PALcode for wrkgp instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// kgp <- a0 (r16)
//-
CALL_PAL_PRIV(PAL_WRKGP_ENTRY)
Call_Pal_Wrkgp:
nop
mtpr r16, pt_kgp
nop // Pad for pt write->read restriction
nop
hw_rei
// .sbttl "wrusp - PALcode for wrusp instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// usp <- a0 (r16)
//-
CALL_PAL_PRIV(PAL_WRUSP_ENTRY)
Call_Pal_Wrusp:
nop
mtpr r16, pt_usp
nop // Pad possible pt write->read restriction
nop
hw_rei
// .sbttl "wrperfmon - PALcode for wrperfmon instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
//
// Function:
// Various control functions for the onchip performance counters
//
// option selector in r16
// option argument in r17
// returned status in r0
//
//
// r16 = 0 Disable performance monitoring for one or more cpu's
// r17 = 0 disable no counters
// r17 = bitmask disable counters specified in bit mask (1=disable)
//
// r16 = 1 Enable performance monitoring for one or more cpu's
// r17 = 0 enable no counters
// r17 = bitmask enable counters specified in bit mask (1=enable)
//
// r16 = 2 Mux select for one or more cpu's
// r17 = Mux selection (cpu specific)
// <24:19> bc_ctl<pm_mux_sel> field (see spec)
// <31>,<7:4>,<3:0> pmctr <sel0>,<sel1>,<sel2> fields (see spec)
//
// r16 = 3 Options
// r17 = (cpu specific)
// <0> = 0 log all processes
// <0> = 1 log only selected processes
// <30,9,8> mode select - ku,kp,kk
//
// r16 = 4 Interrupt frequency select
// r17 = (cpu specific) indicates interrupt frequencies desired for each
// counter, with "zero interrupts" being an option
// frequency info in r17 bits as defined by PMCTR_CTL<FRQx> below
//
// r16 = 5 Read Counters
// r17 = na
// r0 = value (same format as ev5 pmctr)
// <0> = 0 Read failed
// <0> = 1 Read succeeded
//
// r16 = 6 Write Counters
// r17 = value (same format as ev5 pmctr; all counters written simultaneously)
//
// r16 = 7 Enable performance monitoring for one or more cpu's and reset counter to 0
// r17 = 0 enable no counters
// r17 = bitmask enable & clear counters specified in bit mask (1=enable & clear)
//
//=============================================================================
//Assumptions:
//PMCTR_CTL:
//
// <15:14> CTL0 -- encoded frequency select and enable - CTR0
// <13:12> CTL1 -- " - CTR1
// <11:10> CTL2 -- " - CTR2
//
// <9:8> FRQ0 -- frequency select for CTR0 (no enable info)
// <7:6> FRQ1 -- frequency select for CTR1
// <5:4> FRQ2 -- frequency select for CTR2
//
// <0> all vs. select processes (0=all,1=select)
//
// where
// FRQx<1:0>
// 0 1 disable interrupt
// 1 0 frequency = 65536 (16384 for ctr2)
// 1 1 frequency = 256
// note: FRQx<1:0> = 00 will keep counters from ever being enabled.
//
//=============================================================================
//
CALL_PAL_PRIV(0x0039)
// unsupported in Hudson code .. pboyle Nov/95
CALL_PAL_Wrperfmon:
#if perfmon_debug == 0
// "real" performance monitoring code
cmpeq r16, 1, r0 // check for enable
bne r0, perfmon_en // br if requested to enable
cmpeq r16, 2, r0 // check for mux ctl
bne r0, perfmon_muxctl // br if request to set mux controls
cmpeq r16, 3, r0 // check for options
bne r0, perfmon_ctl // br if request to set options
cmpeq r16, 4, r0 // check for interrupt frequency select
bne r0, perfmon_freq // br if request to change frequency select
cmpeq r16, 5, r0 // check for counter read request
bne r0, perfmon_rd // br if request to read counters
cmpeq r16, 6, r0 // check for counter write request
bne r0, perfmon_wr // br if request to write counters
cmpeq r16, 7, r0 // check for counter clear/enable request
bne r0, perfmon_enclr // br if request to clear/enable counters
beq r16, perfmon_dis // br if requested to disable (r16=0)
br r31, perfmon_unknown // br if unknown request
#else
br r31, pal_perfmon_debug
#endif
// .sbttl "rdusp - PALcode for rdusp instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// v0 (r0) <- usp
//-
CALL_PAL_PRIV(PAL_RDUSP_ENTRY)
Call_Pal_Rdusp:
nop
mfpr r0, pt_usp
hw_rei
CALL_PAL_PRIV(0x003B)
CallPal_OpcDec3B:
br r31, osfpal_calpal_opcdec
// .sbttl "whami - PALcode for whami instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// v0 (r0) <- whami
//-
CALL_PAL_PRIV(PAL_WHAMI_ENTRY)
Call_Pal_Whami:
nop
mfpr r0, pt_whami // Get Whami
extbl r0, 1, r0 // Isolate just whami bits
hw_rei
// .sbttl "retsys - PALcode for retsys instruction"
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
// 00(sp) contains return pc
// 08(sp) contains r29
//
// Function:
// Return from system call.
// mode switched from kern to user.
// stacks swapped, ugp, upc restored.
// r23, r25 junked
//-
CALL_PAL_PRIV(PAL_RETSYS_ENTRY)
Call_Pal_Retsys:
lda r25, osfsf_c_size(sp) // pop stack
bis r25, r31, r14 // touch r25 & r14 to stall mf exc_addr
mfpr r14, exc_addr // save exc_addr in case of fault
ldq r23, osfsf_pc(sp) // get pc
ldq r29, osfsf_gp(sp) // get gp
stl_c r31, -4(sp) // clear lock_flag
lda r11, 1<<osfps_v_mode(r31)// new PS:mode=user
mfpr r30, pt_usp // get users stack
bic r23, 3, r23 // clean return pc
mtpr r31, ev5__ipl // zero ibox IPL - 2 bubbles to hw_rei
mtpr r11, ev5__dtb_cm // set Mbox current mode - no virt ref for 2 cycles
mtpr r11, ev5__ps // set Ibox current mode - 2 bubble to hw_rei
mtpr r23, exc_addr // set return address - 1 bubble to hw_rei
mtpr r25, pt_ksp // save kern stack
rc r31 // clear inter_flag
// pvc_violate 248 // possible hidden mt->mf pt violation ok in callpal
hw_rei_spe // and back
CALL_PAL_PRIV(0x003E)
CallPal_OpcDec3E:
br r31, osfpal_calpal_opcdec
// .sbttl "rti - PALcode for rti instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// 00(sp) -> ps
// 08(sp) -> pc
// 16(sp) -> r29 (gp)
// 24(sp) -> r16 (a0)
// 32(sp) -> r17 (a1)
// 40(sp) -> r18 (a3)
//-
CALL_PAL_PRIV(PAL_RTI_ENTRY)
#ifdef SIMOS
/* called once by platform_tlaser */
.globl Call_Pal_Rti
#endif
Call_Pal_Rti:
lda r25, osfsf_c_size(sp) // get updated sp
bis r25, r31, r14 // touch r14,r25 to stall mf exc_addr
mfpr r14, exc_addr // save PC in case of fault
rc r31 // clear intr_flag
ldq r12, -6*8(r25) // get ps
ldq r13, -5*8(r25) // pc
ldq r18, -1*8(r25) // a2
ldq r17, -2*8(r25) // a1
ldq r16, -3*8(r25) // a0
ldq r29, -4*8(r25) // gp
bic r13, 3, r13 // clean return pc
stl_c r31, -4(r25) // clear lock_flag
and r12, osfps_m_mode, r11 // get mode
mtpr r13, exc_addr // set return address
beq r11, rti_to_kern // br if rti to Kern
br r31, rti_to_user // out of call_pal space
// .sbttl "Start the Unprivileged CALL_PAL Entry Points"
// .sbttl "bpt- PALcode for bpt instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// Build stack frame
// a0 <- code
// a1 <- unpred
// a2 <- unpred
// vector via entIF
//
//-
//
.text 1
// . = 0x3000
CALL_PAL_UNPRIV(PAL_BPT_ENTRY)
Call_Pal_Bpt:
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
bis r11, r31, r12 // Save PS for stack write
bge r25, CALL_PAL_bpt_10_ // no stack swap needed if cm=kern
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r30, pt_usp // save user stack
bis r31, r31, r11 // Set new PS
mfpr r30, pt_ksp
CALL_PAL_bpt_10_:
lda sp, 0-osfsf_c_size(sp)// allocate stack space
mfpr r14, exc_addr // get pc
stq r16, osfsf_a0(sp) // save regs
bis r31, osf_a0_bpt, r16 // set a0
stq r17, osfsf_a1(sp) // a1
br r31, bpt_bchk_common // out of call_pal space
// .sbttl "bugchk- PALcode for bugchk instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// Build stack frame
// a0 <- code
// a1 <- unpred
// a2 <- unpred
// vector via entIF
//
//-
//
CALL_PAL_UNPRIV(PAL_BUGCHK_ENTRY)
Call_Pal_Bugchk:
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
bis r11, r31, r12 // Save PS for stack write
bge r25, CALL_PAL_bugchk_10_ // no stack swap needed if cm=kern
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r30, pt_usp // save user stack
bis r31, r31, r11 // Set new PS
mfpr r30, pt_ksp
CALL_PAL_bugchk_10_:
lda sp, 0-osfsf_c_size(sp)// allocate stack space
mfpr r14, exc_addr // get pc
stq r16, osfsf_a0(sp) // save regs
bis r31, osf_a0_bugchk, r16 // set a0
stq r17, osfsf_a1(sp) // a1
br r31, bpt_bchk_common // out of call_pal space
CALL_PAL_UNPRIV(0x0082)
CallPal_OpcDec82:
br r31, osfpal_calpal_opcdec
// .sbttl "callsys - PALcode for callsys instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// Switch mode to kernel and build a callsys stack frame.
// sp = ksp
// gp = kgp
// t8 - t10 (r22-r24) trashed
//
//-
//
CALL_PAL_UNPRIV(PAL_CALLSYS_ENTRY)
Call_Pal_Callsys:
and r11, osfps_m_mode, r24 // get mode
mfpr r22, pt_ksp // get ksp
beq r24, sys_from_kern // sysCall from kern is not allowed
mfpr r12, pt_entsys // get address of callSys routine
//+
// from here on we know we are in user going to Kern
//-
mtpr r31, ev5__dtb_cm // set Mbox current mode - no virt ref for 2 cycles
mtpr r31, ev5__ps // set Ibox current mode - 2 bubble to hw_rei
bis r31, r31, r11 // PS=0 (mode=kern)
mfpr r23, exc_addr // get pc
mtpr r30, pt_usp // save usp
lda sp, 0-osfsf_c_size(r22)// set new sp
stq r29, osfsf_gp(sp) // save user gp/r29
stq r24, osfsf_ps(sp) // save ps
stq r23, osfsf_pc(sp) // save pc
mtpr r12, exc_addr // set address
// 1 cycle to hw_rei
mfpr r29, pt_kgp // get the kern gp/r29
hw_rei_spe // and off we go!
CALL_PAL_UNPRIV(0x0084)
CallPal_OpcDec84:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0085)
CallPal_OpcDec85:
br r31, osfpal_calpal_opcdec
// .sbttl "imb - PALcode for imb instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// Flush the writebuffer and flush the Icache
//
//-
//
CALL_PAL_UNPRIV(PAL_IMB_ENTRY)
Call_Pal_Imb:
mb // Clear the writebuffer
mfpr r31, ev5__mcsr // Sync with clear
nop
nop
br r31, pal_ic_flush // Flush Icache
// .sbttl "CALL_PAL OPCDECs"
CALL_PAL_UNPRIV(0x0087)
CallPal_OpcDec87:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0088)
CallPal_OpcDec88:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0089)
CallPal_OpcDec89:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x008A)
CallPal_OpcDec8A:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x008B)
CallPal_OpcDec8B:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x008C)
CallPal_OpcDec8C:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x008D)
CallPal_OpcDec8D:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x008E)
CallPal_OpcDec8E:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x008F)
CallPal_OpcDec8F:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0090)
CallPal_OpcDec90:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0091)
CallPal_OpcDec91:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0092)
CallPal_OpcDec92:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0093)
CallPal_OpcDec93:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0094)
CallPal_OpcDec94:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0095)
CallPal_OpcDec95:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0096)
CallPal_OpcDec96:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0097)
CallPal_OpcDec97:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0098)
CallPal_OpcDec98:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x0099)
CallPal_OpcDec99:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x009A)
CallPal_OpcDec9A:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x009B)
CallPal_OpcDec9B:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x009C)
CallPal_OpcDec9C:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x009D)
CallPal_OpcDec9D:
br r31, osfpal_calpal_opcdec
// .sbttl "rdunique - PALcode for rdunique instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// v0 (r0) <- unique
//
//-
//
CALL_PAL_UNPRIV(PAL_RDUNIQUE_ENTRY)
CALL_PALrdunique_:
mfpr r0, pt_pcbb // get pcb pointer
ldqp r0, osfpcb_q_unique(r0) // get new value
hw_rei
// .sbttl "wrunique - PALcode for wrunique instruction"
//+
//
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// unique <- a0 (r16)
//
//-
//
CALL_PAL_UNPRIV(PAL_WRUNIQUE_ENTRY)
CALL_PAL_Wrunique:
nop
mfpr r12, pt_pcbb // get pcb pointer
stqp r16, osfpcb_q_unique(r12)// get new value
nop // Pad palshadow write
hw_rei // back
// .sbttl "CALL_PAL OPCDECs"
CALL_PAL_UNPRIV(0x00A0)
CallPal_OpcDecA0:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00A1)
CallPal_OpcDecA1:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00A2)
CallPal_OpcDecA2:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00A3)
CallPal_OpcDecA3:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00A4)
CallPal_OpcDecA4:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00A5)
CallPal_OpcDecA5:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00A6)
CallPal_OpcDecA6:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00A7)
CallPal_OpcDecA7:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00A8)
CallPal_OpcDecA8:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00A9)
CallPal_OpcDecA9:
br r31, osfpal_calpal_opcdec
// .sbttl "gentrap - PALcode for gentrap instruction"
//+
// CALL_PAL_gentrap:
// Entry:
// Vectored into via hardware PALcode instruction dispatch.
//
// Function:
// Build stack frame
// a0 <- code
// a1 <- unpred
// a2 <- unpred
// vector via entIF
//
//-
CALL_PAL_UNPRIV(0x00AA)
// unsupported in Hudson code .. pboyle Nov/95
CALL_PAL_gentrap:
sll r11, 63-osfps_v_mode, r25 // Shift mode up to MS bit
mtpr r31, ev5__ps // Set Ibox current mode to kernel
bis r11, r31, r12 // Save PS for stack write
bge r25, CALL_PAL_gentrap_10_ // no stack swap needed if cm=kern
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r30, pt_usp // save user stack
bis r31, r31, r11 // Set new PS
mfpr r30, pt_ksp
CALL_PAL_gentrap_10_:
lda sp, 0-osfsf_c_size(sp)// allocate stack space
mfpr r14, exc_addr // get pc
stq r16, osfsf_a0(sp) // save regs
bis r31, osf_a0_gentrap, r16// set a0
stq r17, osfsf_a1(sp) // a1
br r31, bpt_bchk_common // out of call_pal space
// .sbttl "CALL_PAL OPCDECs"
CALL_PAL_UNPRIV(0x00AB)
CallPal_OpcDecAB:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00AC)
CallPal_OpcDecAC:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00AD)
CallPal_OpcDecAD:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00AE)
CallPal_OpcDecAE:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00AF)
CallPal_OpcDecAF:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00B0)
CallPal_OpcDecB0:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00B1)
CallPal_OpcDecB1:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00B2)
CallPal_OpcDecB2:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00B3)
CallPal_OpcDecB3:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00B4)
CallPal_OpcDecB4:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00B5)
CallPal_OpcDecB5:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00B6)
CallPal_OpcDecB6:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00B7)
CallPal_OpcDecB7:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00B8)
CallPal_OpcDecB8:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00B9)
CallPal_OpcDecB9:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00BA)
CallPal_OpcDecBA:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00BB)
CallPal_OpcDecBB:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00BC)
CallPal_OpcDecBC:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00BD)
CallPal_OpcDecBD:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00BE)
CallPal_OpcDecBE:
br r31, osfpal_calpal_opcdec
CALL_PAL_UNPRIV(0x00BF)
CallPal_OpcDecBF:
// MODIFIED BY EGH 2/25/04
br r31, copypal_impl
/*======================================================================*/
/* OSF/1 CALL_PAL CONTINUATION AREA */
/*======================================================================*/
.text 2
. = 0x4000
// .sbttl "Continuation of MTPR_PERFMON"
ALIGN_BLOCK
#if perfmon_debug == 0
// "real" performance monitoring code
// mux ctl
perfmon_muxctl:
lda r8, 1(r31) // get a 1
sll r8, pmctr_v_sel0, r8 // move to sel0 position
or r8, ((0xf<<pmctr_v_sel1) | (0xf<<pmctr_v_sel2)), r8 // build mux select mask
and r17, r8, r25 // isolate pmctr mux select bits
mfpr r0, ev5__pmctr
bic r0, r8, r0 // clear old mux select bits
or r0,r25, r25 // or in new mux select bits
mtpr r25, ev5__pmctr
// ok, now tackle cbox mux selects
ldah r14, 0xfff0(r31)
zap r14, 0xE0, r14 // Get Cbox IPR base
//orig get_bc_ctl_shadow r16 // bc_ctl returned in lower longword
// adapted from ev5_pal_macros.mar
mfpr r16, pt_impure
lda r16, CNS_Q_IPR(r16)
RESTORE_SHADOW(r16,CNS_Q_BC_CTL,r16);
lda r8, 0x3F(r31) // build mux select mask
sll r8, bc_ctl_v_pm_mux_sel, r8
and r17, r8, r25 // isolate bc_ctl mux select bits
bic r16, r8, r16 // isolate old mux select bits
or r16, r25, r25 // create new bc_ctl
mb // clear out cbox for future ipr write
stqp r25, ev5__bc_ctl(r14) // store to cbox ipr
mb // clear out cbox for future ipr write
//orig update_bc_ctl_shadow r25, r16 // r25=value, r16-overwritten with adjusted impure ptr
// adapted from ev5_pal_macros.mar
mfpr r16, pt_impure
lda r16, CNS_Q_IPR(r16)
SAVE_SHADOW(r25,CNS_Q_BC_CTL,r16);
br r31, perfmon_success
// requested to disable perf monitoring
perfmon_dis:
mfpr r14, ev5__pmctr // read ibox pmctr ipr
perfmon_dis_ctr0: // and begin with ctr0
blbc r17, perfmon_dis_ctr1 // do not disable ctr0
lda r8, 3(r31)
sll r8, pmctr_v_ctl0, r8
bic r14, r8, r14 // disable ctr0
perfmon_dis_ctr1:
srl r17, 1, r17
blbc r17, perfmon_dis_ctr2 // do not disable ctr1
lda r8, 3(r31)
sll r8, pmctr_v_ctl1, r8
bic r14, r8, r14 // disable ctr1
perfmon_dis_ctr2:
srl r17, 1, r17
blbc r17, perfmon_dis_update // do not disable ctr2
lda r8, 3(r31)
sll r8, pmctr_v_ctl2, r8
bic r14, r8, r14 // disable ctr2
perfmon_dis_update:
mtpr r14, ev5__pmctr // update pmctr ipr
//;the following code is not needed for ev5 pass2 and later, but doesn't hurt anything to leave in
// adapted from ev5_pal_macros.mar
//orig get_pmctr_ctl r8, r25 // pmctr_ctl bit in r8. adjusted impure pointer in r25
mfpr r25, pt_impure
lda r25, CNS_Q_IPR(r25)
RESTORE_SHADOW(r8,CNS_Q_PM_CTL,r25);
lda r17, 0x3F(r31) // build mask
sll r17, pmctr_v_ctl2, r17 // shift mask to correct position
and r14, r17, r14 // isolate ctl bits
bic r8, r17, r8 // clear out old ctl bits
or r14, r8, r14 // create shadow ctl bits
//orig store_reg1 pmctr_ctl, r14, r25, ipr=1 // update pmctr_ctl register
//adjusted impure pointer still in r25
SAVE_SHADOW(r14,CNS_Q_PM_CTL,r25);
br r31, perfmon_success
// requested to enable perf monitoring
//;the following code can be greatly simplified for pass2, but should work fine as is.
perfmon_enclr:
lda r9, 1(r31) // set enclr flag
br perfmon_en_cont
perfmon_en:
bis r31, r31, r9 // clear enclr flag
perfmon_en_cont:
mfpr r8, pt_pcbb // get PCB base
//orig get_pmctr_ctl r25, r25
mfpr r25, pt_impure
lda r25, CNS_Q_IPR(r25)
RESTORE_SHADOW(r25,CNS_Q_PM_CTL,r25);
ldqp r16, osfpcb_q_fen(r8) // read DAT/PME/FEN quadword
mfpr r14, ev5__pmctr // read ibox pmctr ipr
srl r16, osfpcb_v_pme, r16 // get pme bit
mfpr r13, icsr
and r16, 1, r16 // isolate pme bit
// this code only needed in pass2 and later
//orig sget_addr r12, 1<<icsr_v_pmp, r31
lda r12, 1<<icsr_v_pmp(r31) // pb
bic r13, r12, r13 // clear pmp bit
sll r16, icsr_v_pmp, r12 // move pme bit to icsr<pmp> position
or r12, r13, r13 // new icsr with icsr<pmp> bit set/clear
ev5_pass2 mtpr r13, icsr // update icsr
#if ev5_p1 != 0
lda r12, 1(r31)
cmovlbc r25, r12, r16 // r16<0> set if either pme=1 or sprocess=0 (sprocess in bit 0 of r25)
#else
bis r31, 1, r16 // set r16<0> on pass2 to update pmctr always (icsr provides real enable)
#endif
sll r25, 6, r25 // shift frequency bits into pmctr_v_ctl positions
bis r14, r31, r13 // copy pmctr
perfmon_en_ctr0: // and begin with ctr0
blbc r17, perfmon_en_ctr1 // do not enable ctr0
blbc r9, perfmon_en_noclr0 // enclr flag set, clear ctr0 field
lda r8, 0xffff(r31)
zapnot r8, 3, r8 // ctr0<15:0> mask
sll r8, pmctr_v_ctr0, r8
bic r14, r8, r14 // clear ctr bits
bic r13, r8, r13 // clear ctr bits
perfmon_en_noclr0:
//orig get_addr r8, 3<<pmctr_v_ctl0, r31
LDLI(r8, (3<<pmctr_v_ctl0))
and r25, r8, r12 //isolate frequency select bits for ctr0
bic r14, r8, r14 // clear ctl0 bits in preparation for enabling
or r14,r12,r14 // or in new ctl0 bits
perfmon_en_ctr1: // enable ctr1
srl r17, 1, r17 // get ctr1 enable
blbc r17, perfmon_en_ctr2 // do not enable ctr1
blbc r9, perfmon_en_noclr1 // if enclr flag set, clear ctr1 field
lda r8, 0xffff(r31)
zapnot r8, 3, r8 // ctr1<15:0> mask
sll r8, pmctr_v_ctr1, r8
bic r14, r8, r14 // clear ctr bits
bic r13, r8, r13 // clear ctr bits
perfmon_en_noclr1:
//orig get_addr r8, 3<<pmctr_v_ctl1, r31
LDLI(r8, (3<<pmctr_v_ctl1))
and r25, r8, r12 //isolate frequency select bits for ctr1
bic r14, r8, r14 // clear ctl1 bits in preparation for enabling
or r14,r12,r14 // or in new ctl1 bits
perfmon_en_ctr2: // enable ctr2
srl r17, 1, r17 // get ctr2 enable
blbc r17, perfmon_en_return // do not enable ctr2 - return
blbc r9, perfmon_en_noclr2 // if enclr flag set, clear ctr2 field
lda r8, 0x3FFF(r31) // ctr2<13:0> mask
sll r8, pmctr_v_ctr2, r8
bic r14, r8, r14 // clear ctr bits
bic r13, r8, r13 // clear ctr bits
perfmon_en_noclr2:
//orig get_addr r8, 3<<pmctr_v_ctl2, r31
LDLI(r8, (3<<pmctr_v_ctl2))
and r25, r8, r12 //isolate frequency select bits for ctr2
bic r14, r8, r14 // clear ctl2 bits in preparation for enabling
or r14,r12,r14 // or in new ctl2 bits
perfmon_en_return:
cmovlbs r16, r14, r13 // if pme enabled, move enables into pmctr
// else only do the counter clears
mtpr r13, ev5__pmctr // update pmctr ipr
//;this code not needed for pass2 and later, but does not hurt to leave it in
lda r8, 0x3F(r31)
//orig get_pmctr_ctl r25, r12 // read pmctr ctl; r12=adjusted impure pointer
mfpr r12, pt_impure
lda r12, CNS_Q_IPR(r12)
RESTORE_SHADOW(r25,CNS_Q_PM_CTL,r12);
sll r8, pmctr_v_ctl2, r8 // build ctl mask
and r8, r14, r14 // isolate new ctl bits
bic r25, r8, r25 // clear out old ctl value
or r25, r14, r14 // create new pmctr_ctl
//orig store_reg1 pmctr_ctl, r14, r12, ipr=1
SAVE_SHADOW(r14,CNS_Q_PM_CTL,r12); // r12 still has the adjusted impure ptr
br r31, perfmon_success
// options...
perfmon_ctl:
// set mode
//orig get_pmctr_ctl r14, r12 // read shadow pmctr ctl; r12=adjusted impure pointer
mfpr r12, pt_impure
lda r12, CNS_Q_IPR(r12)
RESTORE_SHADOW(r14,CNS_Q_PM_CTL,r12);
//orig get_addr r8, (1<<pmctr_v_killu) | (1<<pmctr_v_killp) | (1<<pmctr_v_killk), r31 // build mode mask for pmctr register
LDLI(r8, ((1<<pmctr_v_killu) | (1<<pmctr_v_killp) | (1<<pmctr_v_killk)))
mfpr r0, ev5__pmctr
and r17, r8, r25 // isolate pmctr mode bits
bic r0, r8, r0 // clear old mode bits
or r0, r25, r25 // or in new mode bits
mtpr r25, ev5__pmctr
//;the following code will only be used in pass2, but should not hurt anything if run in pass1.
mfpr r8, icsr
lda r25, 1<<icsr_v_pma(r31) // set icsr<pma> if r17<0>=0
bic r8, r25, r8 // clear old pma bit
cmovlbs r17, r31, r25 // and clear icsr<pma> if r17<0>=1
or r8, r25, r8
ev5_pass2 mtpr r8, icsr // 4 bubbles to hw_rei
mfpr r31, pt0 // pad icsr write
mfpr r31, pt0 // pad icsr write
//;the following code not needed for pass2 and later, but should work anyway.
bis r14, 1, r14 // set for select processes
blbs r17, perfmon_sp // branch if select processes
bic r14, 1, r14 // all processes
perfmon_sp:
//orig store_reg1 pmctr_ctl, r14, r12, ipr=1 // update pmctr_ctl register
SAVE_SHADOW(r14,CNS_Q_PM_CTL,r12); // r12 still has the adjusted impure ptr
br r31, perfmon_success
// counter frequency select
perfmon_freq:
//orig get_pmctr_ctl r14, r12 // read shadow pmctr ctl; r12=adjusted impure pointer
mfpr r12, pt_impure
lda r12, CNS_Q_IPR(r12)
RESTORE_SHADOW(r14,CNS_Q_PM_CTL,r12);
lda r8, 0x3F(r31)
//orig sll r8, pmctr_ctl_v_frq2, r8 // build mask for frequency select field
// I guess this should be a shift of 4 bits from the above control register structure .. pb
#define pmctr_ctl_v_frq2_SHIFT 4
sll r8, pmctr_ctl_v_frq2_SHIFT, r8 // build mask for frequency select field
and r8, r17, r17
bic r14, r8, r14 // clear out old frequency select bits
or r17, r14, r14 // or in new frequency select info
//orig store_reg1 pmctr_ctl, r14, r12, ipr=1 // update pmctr_ctl register
SAVE_SHADOW(r14,CNS_Q_PM_CTL,r12); // r12 still has the adjusted impure ptr
br r31, perfmon_success
// read counters
perfmon_rd:
mfpr r0, ev5__pmctr
or r0, 1, r0 // or in return status
hw_rei // back to user
// write counters
perfmon_wr:
mfpr r14, ev5__pmctr
lda r8, 0x3FFF(r31) // ctr2<13:0> mask
sll r8, pmctr_v_ctr2, r8
//orig get_addr r9, 0xFFFFFFFF, r31, verify=0 // ctr2<15:0>,ctr1<15:0> mask
LDLI(r9, (0xFFFFFFFF))
sll r9, pmctr_v_ctr1, r9
or r8, r9, r8 // or ctr2, ctr1, ctr0 mask
bic r14, r8, r14 // clear ctr fields
and r17, r8, r25 // clear all but ctr fields
or r25, r14, r14 // write ctr fields
mtpr r14, ev5__pmctr // update pmctr ipr
mfpr r31, pt0 // pad pmctr write (needed only to keep PVC happy)
perfmon_success:
or r31, 1, r0 // set success
hw_rei // back to user
perfmon_unknown:
or r31, r31, r0 // set fail
hw_rei // back to user
#else
// end of "real code", start of debug code
//+
// Debug environment:
// (in pass2, always set icsr<pma> to ensure master counter enable is on)
// R16 = 0 Write to on-chip performance monitor ipr
// r17 = on-chip ipr
// r0 = return value of read of on-chip performance monitor ipr
// R16 = 1 Setup Cbox mux selects
// r17 = Cbox mux selects in same position as in bc_ctl ipr.
// r0 = return value of read of on-chip performance monitor ipr
//
//-
pal_perfmon_debug:
mfpr r8, icsr
lda r9, 1<<icsr_v_pma(r31)
bis r8, r9, r8
mtpr r8, icsr
mfpr r0, ev5__pmctr // read old value
bne r16, cbox_mux_sel
mtpr r17, ev5__pmctr // update pmctr ipr
br r31, end_pm
cbox_mux_sel:
// ok, now tackle cbox mux selects
ldah r14, 0xfff0(r31)
zap r14, 0xE0, r14 // Get Cbox IPR base
//orig get_bc_ctl_shadow r16 // bc_ctl returned
mfpr r16, pt_impure
lda r16, CNS_Q_IPR(r16)
RESTORE_SHADOW(r16,CNS_Q_BC_CTL,r16);
lda r8, 0x3F(r31) // build mux select mask
sll r8, BC_CTL_V_PM_MUX_SEL, r8
and r17, r8, r25 // isolate bc_ctl mux select bits
bic r16, r8, r16 // isolate old mux select bits
or r16, r25, r25 // create new bc_ctl
mb // clear out cbox for future ipr write
stqp r25, ev5__bc_ctl(r14) // store to cbox ipr
mb // clear out cbox for future ipr write
//orig update_bc_ctl_shadow r25, r16 // r25=value, r16-overwritten with adjusted impure ptr
mfpr r16, pt_impure
lda r16, CNS_Q_IPR(r16)
SAVE_SHADOW(r25,CNS_Q_BC_CTL,r16);
end_pm: hw_rei
#endif
//;The following code is a workaround for a cpu bug where Istream prefetches to
//;super-page address space in user mode may escape off-chip.
#if spe_fix != 0
ALIGN_BLOCK
hw_rei_update_spe:
mfpr r12, pt_misc // get previous mode
srl r11, osfps_v_mode, r10 // isolate current mode bit
and r10, 1, r10
extbl r12, 7, r8 // get previous mode field
and r8, 1, r8 // isolate previous mode bit
cmpeq r10, r8, r8 // compare previous and current modes
beq r8, hw_rei_update_spe_5_
hw_rei // if same, just return
hw_rei_update_spe_5_:
#if fill_err_hack != 0
fill_error_hack
#endif
mfpr r8, icsr // get current icsr value
ldah r9, (2<<(icsr_v_spe-16))(r31) // get spe bit mask
bic r8, r9, r8 // disable spe
xor r10, 1, r9 // flip mode for new spe bit
sll r9, icsr_v_spe+1, r9 // shift into position
bis r8, r9, r8 // enable/disable spe
lda r9, 1(r31) // now update our flag
sll r9, pt_misc_v_cm, r9 // previous mode saved bit mask
bic r12, r9, r12 // clear saved previous mode
sll r10, pt_misc_v_cm, r9 // current mode saved bit mask
bis r12, r9, r12 // set saved current mode
mtpr r12, pt_misc // update pt_misc
mtpr r8, icsr // update icsr
#if osf_chm_fix != 0
blbc r10, hw_rei_update_spe_10_ // branch if not user mode
mb // ensure no outstanding fills
lda r12, 1<<dc_mode_v_dc_ena(r31) // User mode
mtpr r12, dc_mode // Turn on dcache
mtpr r31, dc_flush // and flush it
br r31, pal_ic_flush
hw_rei_update_spe_10_: mfpr r9, pt_pcbb // Kernel mode
ldqp r9, osfpcb_q_Fen(r9) // get FEN
blbc r9, pal_ic_flush // return if FP disabled
mb // ensure no outstanding fills
mtpr r31, dc_mode // turn off dcache
#endif
br r31, pal_ic_flush // Pal restriction - must flush Icache if changing ICSR<SPE>
#endif
copypal_impl:
mov r16, r0
ble r18, finished #if len <=0 we are finished
ldq_u r8, 0(r17)
xor r17, r16, r9
and r9, 7, r9
and r16, 7, r10
bne r9, unaligned
beq r10, aligned
ldq_u r9, 0(r16)
addq r18, r10, r18
mskqh r8, r17, r8
mskql r9, r17, r9
bis r8, r9, r8
aligned:
subq r18, 1, r10
bic r10, 7, r10
and r18, 7, r18
beq r10, aligned_done
loop:
stq_u r8, 0(r16)
ldq_u r8, 8(r17)
subq r10, 8, r10
lda r16,8(r16)
lda r17,8(r17)
bne r10, loop
aligned_done:
bne r18, few_left
stq_u r8, 0(r16)
br r31, finished
few_left:
mskql r8, r18, r10
ldq_u r9, 0(r16)
mskqh r9, r18, r9
bis r10, r9, r10
stq_u r10, 0(r16)
br r31, finished
unaligned:
addq r17, r18, r25
cmpule r18, 8, r9
bne r9, unaligned_few_left
beq r10, unaligned_dest_aligned
and r16, 7, r10
subq r31, r10, r10
addq r10, 8, r10
ldq_u r9, 7(r17)
extql r8, r17, r8
extqh r9, r17, r9
bis r8, r9, r12
insql r12, r16, r12
ldq_u r13, 0(r16)
mskql r13, r16, r13
bis r12, r13, r12
stq_u r12, 0(r16)
addq r16, r10, r16
addq r17, r10, r17
subq r18, r10, r18
ldq_u r8, 0(r17)
unaligned_dest_aligned:
subq r18, 1, r10
bic r10, 7, r10
and r18, 7, r18
beq r10, unaligned_partial_left
unaligned_loop:
ldq_u r9, 7(r17)
lda r17, 8(r17)
extql r8, r17, r12
extqh r9, r17, r13
subq r10, 8, r10
bis r12, r13, r13
stq r13, 0(r16)
lda r16, 8(r16)
beq r10, unaligned_second_partial_left
ldq_u r8, 7(r17)
lda r17, 8(r17)
extql r9, r17, r12
extqh r8, r17, r13
bis r12, r13, r13
subq r10, 8, r10
stq r13, 0(r16)
lda r16, 8(r16)
bne r10, unaligned_loop
unaligned_partial_left:
mov r8, r9
unaligned_second_partial_left:
ldq_u r8, -1(r25)
extql r9, r17, r9
extqh r8, r17, r8
bis r8, r9, r8
bne r18, few_left
stq_u r8, 0(r16)
br r31, finished
unaligned_few_left:
ldq_u r9, -1(r25)
extql r8, r17, r8
extqh r9, r17, r9
bis r8, r9, r8
insqh r8, r16, r9
insql r8, r16, r8
lda r12, -1(r31)
mskql r12, r18, r13
cmovne r13, r13, r12
insqh r12, r16, r13
insql r12, r16, r12
addq r16, r18, r10
ldq_u r14, 0(r16)
ldq_u r25, -1(r10)
bic r14, r12, r14
bic r25, r13, r25
and r8, r12, r8
and r9, r13, r9
bis r8, r14, r8
bis r9, r25, r9
stq_u r9, -1(r10)
stq_u r8, 0(r16)
finished:
hw_rei
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