gem5/system/alpha/console/paljtokern.S

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/*
* Copyright (c) 2003-2004 The Regents of The University of Michigan
* Copyright (c) 1993 The Hewlett-Packard Development Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "dc21164FromGasSources.h" // DECchip 21164 specific definitions
#include "ev5_defs.h"
#include "fromHudsonOsf.h" // OSF/1 specific definitions
#include "fromHudsonMacros.h" // Global macro definitions
/* Jump to kernel
* args:
* Kernel address - a0
* PCBB - a1
* First free PFN - a3?
*
* Enable kseg addressing in ICSR
* Enable kseg addressing in MCSR
* Set VTBR -- Set to 1GB as per SRM, or maybe 8GB??
* Set PCBB -- pass pointer in arg
* Set PTBR -- get it out of PCB
* Set KSP -- get it out of PCB
*
* Jump to kernel address
*
* Kernel args-
* s0 first free PFN
* s1 ptbr
* s2 argc 0
* s3 argv NULL
* s5 osf_param (sysconfigtab) NULL
*/
.global palJToKern
.text 3
palJToKern:
ALIGN_BRANCH
ldq_p a0, 0(zero)
ldq_p a1, 8(zero)
ldq_p a3, 16(zero)
/* Point the Vptbr at 8GB */
lda t0, 0x1(zero)
sll t0, 33, t0
mtpr t0, mVptBr // Load Mbox copy
mtpr t0, iVptBr // Load Ibox copy
STALL // don't dual issue the load with mtpr -pb
/* Turn on superpage mapping in the mbox and icsr */
lda t0, (2<<MCSR_V_SP)(zero) // Get a '10' (binary) in MCSR<SP>
STALL // don't dual issue the load with mtpr -pb
mtpr t0, mcsr // Set the super page mode enable bit
STALL // don't dual issue the load with mtpr -pb
lda t0, 0(zero)
mtpr t0, dtbAsn
mtpr t0, itbAsn
LDLI (t1,0x20000000)
STALL // don't dual issue the load with mtpr -pb
mfpr t0, icsr // Enable superpage mapping
STALL // don't dual issue the load with mtpr -pb
bis t0, t1, t0
mtpr t0, icsr
STALL // Required stall to update chip ...
STALL
STALL
STALL
STALL
ldq_p s0, PCB_Q_PTBR(a1)
sll s0, VA_S_OFF, s0 // Shift PTBR into position
STALL // don't dual issue the load with mtpr -pb
mtpr s0, ptPtbr // PHYSICAL MBOX INST -> MT PT20 IN 0,1
STALL // don't dual issue the load with mtpr -pb
ldq_p sp, PCB_Q_KSP(a1)
mtpr a0, excAddr // Load the dispatch address.
STALL // don't dual issue the load with mtpr -pb
bis a3, zero, a0 // first free PFN
ldq_p a1, PCB_Q_PTBR(a1) // ptbr
ldq_p a2, 24(zero) // argc
ldq_p a3, 32(zero) // argv
ldq_p a4, 40(zero) // environ
lda a5, 0(zero) // osf_param
STALL // don't dual issue the load with mtpr -pb
mtpr zero, dtbIa // Flush all D-stream TB entries
mtpr zero, itbIa // Flush all I-stream TB entries
br zero, 2f
ALIGN_BLOCK
2: NOP
mtpr zero, icFlush // Flush the icache.
NOP
NOP
NOP // Required NOPs ... 1-10
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP // Required NOPs ... 11-20
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP // Required NOPs ... 21-30
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP // Required NOPs ... 31-40
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP // Required NOPs ... 41-44
NOP
NOP
NOP
hw_rei_stall // Dispatch to kernel