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minix/sys/arch/x86/include/pmap.h
Ben Gras 1cd76c7513 sys/arch/x86/include updates 
. primary purpose is to synchronize with <ieeefp.h> which
	  expects a fp_prec from sys/arch/x86/include/ieeefp.h
2013-01-15 12:14:01 +00:00

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/* $NetBSD: pmap.h,v 1.52 2012/04/20 22:23:24 rmind Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Copyright (c) 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Frank van der Linden for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* pmap.h: see pmap.c for the history of this pmap module.
*/
#ifndef _X86_PMAP_H_
#define _X86_PMAP_H_
/*
* pl*_pi: index in the ptp page for a pde mapping a VA.
* (pl*_i below is the index in the virtual array of all pdes per level)
*/
#define pl1_pi(VA) (((VA_SIGN_POS(VA)) & L1_MASK) >> L1_SHIFT)
#define pl2_pi(VA) (((VA_SIGN_POS(VA)) & L2_MASK) >> L2_SHIFT)
#define pl3_pi(VA) (((VA_SIGN_POS(VA)) & L3_MASK) >> L3_SHIFT)
#define pl4_pi(VA) (((VA_SIGN_POS(VA)) & L4_MASK) >> L4_SHIFT)
/*
* pl*_i: generate index into pde/pte arrays in virtual space
*
* pl_i(va, X) == plX_i(va) <= pl_i_roundup(va, X)
*/
#define pl1_i(VA) (((VA_SIGN_POS(VA)) & L1_FRAME) >> L1_SHIFT)
#define pl2_i(VA) (((VA_SIGN_POS(VA)) & L2_FRAME) >> L2_SHIFT)
#define pl3_i(VA) (((VA_SIGN_POS(VA)) & L3_FRAME) >> L3_SHIFT)
#define pl4_i(VA) (((VA_SIGN_POS(VA)) & L4_FRAME) >> L4_SHIFT)
#define pl_i(va, lvl) \
(((VA_SIGN_POS(va)) & ptp_masks[(lvl)-1]) >> ptp_shifts[(lvl)-1])
#define pl_i_roundup(va, lvl) pl_i((va)+ ~ptp_masks[(lvl)-1], (lvl))
/*
* PTP macros:
* a PTP's index is the PD index of the PDE that points to it
* a PTP's offset is the byte-offset in the PTE space that this PTP is at
* a PTP's VA is the first VA mapped by that PTP
*/
#define ptp_va2o(va, lvl) (pl_i(va, (lvl)+1) * PAGE_SIZE)
/* size of a PDP: usually one page, except for PAE */
#ifdef PAE
#define PDP_SIZE 4
#else
#define PDP_SIZE 1
#endif
#if defined(_KERNEL)
#include <sys/kcpuset.h>
/*
* pmap data structures: see pmap.c for details of locking.
*/
/*
* we maintain a list of all non-kernel pmaps
*/
LIST_HEAD(pmap_head, pmap); /* struct pmap_head: head of a pmap list */
/*
* linked list of all non-kernel pmaps
*/
extern struct pmap_head pmaps;
extern kmutex_t pmaps_lock; /* protects pmaps */
/*
* pool_cache(9) that PDPs are allocated from
*/
extern struct pool_cache pmap_pdp_cache;
/*
* the pmap structure
*
* note that the pm_obj contains the lock pointer, the reference count,
* page list, and number of PTPs within the pmap.
*
* pm_lock is the same as the lock for vm object 0. Changes to
* the other objects may only be made if that lock has been taken
* (the other object locks are only used when uvm_pagealloc is called)
*
* XXX If we ever support processor numbers higher than 31, we'll have
* XXX to rethink the CPU mask.
*/
struct pmap {
struct uvm_object pm_obj[PTP_LEVELS-1]; /* objects for lvl >= 1) */
#define pm_lock pm_obj[0].vmobjlock
kmutex_t pm_obj_lock[PTP_LEVELS-1]; /* locks for pm_objs */
LIST_ENTRY(pmap) pm_list; /* list (lck by pm_list lock) */
pd_entry_t *pm_pdir; /* VA of PD (lck by object lock) */
paddr_t pm_pdirpa[PDP_SIZE]; /* PA of PDs (read-only after create) */
struct vm_page *pm_ptphint[PTP_LEVELS-1];
/* pointer to a PTP in our pmap */
struct pmap_statistics pm_stats; /* pmap stats (lck by object lock) */
#if !defined(__x86_64__)
vaddr_t pm_hiexec; /* highest executable mapping */
#endif /* !defined(__x86_64__) */
int pm_flags; /* see below */
union descriptor *pm_ldt; /* user-set LDT */
size_t pm_ldt_len; /* size of LDT in bytes */
int pm_ldt_sel; /* LDT selector */
kcpuset_t *pm_cpus; /* mask of CPUs using pmap */
kcpuset_t *pm_kernel_cpus; /* mask of CPUs using kernel part
of pmap */
kcpuset_t *pm_xen_ptp_cpus; /* mask of CPUs which have this pmap's
ptp mapped */
uint64_t pm_ncsw; /* for assertions */
struct vm_page *pm_gc_ptp; /* pages from pmap g/c */
};
/* macro to access pm_pdirpa slots */
#ifdef PAE
#define pmap_pdirpa(pmap, index) \
((pmap)->pm_pdirpa[l2tol3(index)] + l2tol2(index) * sizeof(pd_entry_t))
#else
#define pmap_pdirpa(pmap, index) \
((pmap)->pm_pdirpa[0] + (index) * sizeof(pd_entry_t))
#endif
/*
* flag to be used for kernel mappings: PG_u on Xen/amd64,
* 0 otherwise.
*/
#if defined(XEN) && defined(__x86_64__)
#define PG_k PG_u
#else
#define PG_k 0
#endif
/*
* MD flags that we use for pmap_enter and pmap_kenter_pa:
*/
/*
* global kernel variables
*/
/*
* PDPpaddr is the physical address of the kernel's PDP.
* - i386 non-PAE and amd64: PDPpaddr corresponds directly to the %cr3
* value associated to the kernel process, proc0.
* - i386 PAE: it still represents the PA of the kernel's PDP (L2). Due to
* the L3 PD, it cannot be considered as the equivalent of a %cr3 any more.
* - Xen: it corresponds to the PFN of the kernel's PDP.
*/
extern u_long PDPpaddr;
extern int pmap_pg_g; /* do we support PG_G? */
extern long nkptp[PTP_LEVELS];
/*
* macros
*/
#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
#define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count)
#define pmap_clear_modify(pg) pmap_clear_attrs(pg, PG_M)
#define pmap_clear_reference(pg) pmap_clear_attrs(pg, PG_U)
#define pmap_copy(DP,SP,D,L,S)
#define pmap_is_modified(pg) pmap_test_attrs(pg, PG_M)
#define pmap_is_referenced(pg) pmap_test_attrs(pg, PG_U)
#define pmap_move(DP,SP,D,L,S)
#define pmap_phys_address(ppn) (x86_ptob(ppn) & ~X86_MMAP_FLAG_MASK)
#define pmap_mmap_flags(ppn) x86_mmap_flags(ppn)
#define pmap_valid_entry(E) ((E) & PG_V) /* is PDE or PTE valid? */
#if defined(__x86_64__) || defined(PAE)
#define X86_MMAP_FLAG_SHIFT (64 - PGSHIFT)
#else
#define X86_MMAP_FLAG_SHIFT (32 - PGSHIFT)
#endif
#define X86_MMAP_FLAG_MASK 0xf
#define X86_MMAP_FLAG_PREFETCH 0x1
/*
* prototypes
*/
void pmap_activate(struct lwp *);
void pmap_bootstrap(vaddr_t);
bool pmap_clear_attrs(struct vm_page *, unsigned);
void pmap_deactivate(struct lwp *);
void pmap_page_remove (struct vm_page *);
void pmap_remove(struct pmap *, vaddr_t, vaddr_t);
bool pmap_test_attrs(struct vm_page *, unsigned);
void pmap_write_protect(struct pmap *, vaddr_t, vaddr_t, vm_prot_t);
void pmap_load(void);
paddr_t pmap_init_tmp_pgtbl(paddr_t);
void pmap_remove_all(struct pmap *);
void pmap_ldt_sync(struct pmap *);
void pmap_emap_enter(vaddr_t, paddr_t, vm_prot_t);
void pmap_emap_remove(vaddr_t, vsize_t);
void pmap_emap_sync(bool);
void pmap_map_ptes(struct pmap *, struct pmap **, pd_entry_t **,
pd_entry_t * const **);
void pmap_unmap_ptes(struct pmap *, struct pmap *);
int pmap_pdes_invalid(vaddr_t, pd_entry_t * const *, pd_entry_t *);
u_int x86_mmap_flags(paddr_t);
bool pmap_is_curpmap(struct pmap *);
vaddr_t reserve_dumppages(vaddr_t); /* XXX: not a pmap fn */
typedef enum tlbwhy {
TLBSHOOT_APTE,
TLBSHOOT_KENTER,
TLBSHOOT_KREMOVE,
TLBSHOOT_FREE_PTP1,
TLBSHOOT_FREE_PTP2,
TLBSHOOT_REMOVE_PTE,
TLBSHOOT_REMOVE_PTES,
TLBSHOOT_SYNC_PV1,
TLBSHOOT_SYNC_PV2,
TLBSHOOT_WRITE_PROTECT,
TLBSHOOT_ENTER,
TLBSHOOT_UPDATE,
TLBSHOOT_BUS_DMA,
TLBSHOOT_BUS_SPACE,
TLBSHOOT__MAX,
} tlbwhy_t;
void pmap_tlb_init(void);
void pmap_tlb_cpu_init(struct cpu_info *);
void pmap_tlb_shootdown(pmap_t, vaddr_t, pt_entry_t, tlbwhy_t);
void pmap_tlb_shootnow(void);
void pmap_tlb_intr(void);
#define __HAVE_PMAP_EMAP
#define PMAP_GROWKERNEL /* turn on pmap_growkernel interface */
#define PMAP_FORK /* turn on pmap_fork interface */
/*
* Do idle page zero'ing uncached to avoid polluting the cache.
*/
bool pmap_pageidlezero(paddr_t);
#define PMAP_PAGEIDLEZERO(pa) pmap_pageidlezero((pa))
/*
* inline functions
*/
__inline static bool __unused
pmap_pdes_valid(vaddr_t va, pd_entry_t * const *pdes, pd_entry_t *lastpde)
{
return pmap_pdes_invalid(va, pdes, lastpde) == 0;
}
/*
* pmap_update_pg: flush one page from the TLB (or flush the whole thing
* if hardware doesn't support one-page flushing)
*/
__inline static void __unused
pmap_update_pg(vaddr_t va)
{
invlpg(va);
}
/*
* pmap_update_2pg: flush two pages from the TLB
*/
__inline static void __unused
pmap_update_2pg(vaddr_t va, vaddr_t vb)
{
invlpg(va);
invlpg(vb);
}
/*
* pmap_page_protect: change the protection of all recorded mappings
* of a managed page
*
* => this function is a frontend for pmap_page_remove/pmap_clear_attrs
* => we only have to worry about making the page more protected.
* unprotecting a page is done on-demand at fault time.
*/
__inline static void __unused
pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
{
if ((prot & VM_PROT_WRITE) == 0) {
if (prot & (VM_PROT_READ|VM_PROT_EXECUTE)) {
(void) pmap_clear_attrs(pg, PG_RW);
} else {
pmap_page_remove(pg);
}
}
}
/*
* pmap_protect: change the protection of pages in a pmap
*
* => this function is a frontend for pmap_remove/pmap_write_protect
* => we only have to worry about making the page more protected.
* unprotecting a page is done on-demand at fault time.
*/
__inline static void __unused
pmap_protect(struct pmap *pmap, vaddr_t sva, vaddr_t eva, vm_prot_t prot)
{
if ((prot & VM_PROT_WRITE) == 0) {
if (prot & (VM_PROT_READ|VM_PROT_EXECUTE)) {
pmap_write_protect(pmap, sva, eva, prot);
} else {
pmap_remove(pmap, sva, eva);
}
}
}
/*
* various address inlines
*
* vtopte: return a pointer to the PTE mapping a VA, works only for
* user and PT addresses
*
* kvtopte: return a pointer to the PTE mapping a kernel VA
*/
#include <lib/libkern/libkern.h>
static __inline pt_entry_t * __unused
vtopte(vaddr_t va)
{
KASSERT(va < VM_MIN_KERNEL_ADDRESS);
return (PTE_BASE + pl1_i(va));
}
static __inline pt_entry_t * __unused
kvtopte(vaddr_t va)
{
pd_entry_t *pde;
KASSERT(va >= VM_MIN_KERNEL_ADDRESS);
pde = L2_BASE + pl2_i(va);
if (*pde & PG_PS)
return ((pt_entry_t *)pde);
return (PTE_BASE + pl1_i(va));
}
paddr_t vtophys(vaddr_t);
vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, vm_prot_t);
void pmap_cpu_init_late(struct cpu_info *);
bool sse2_idlezero_page(void *);
#ifdef XEN
#include <sys/bitops.h>
#define XPTE_MASK L1_FRAME
/* Selects the index of a PTE in (A)PTE_BASE */
#define XPTE_SHIFT (L1_SHIFT - ilog2(sizeof(pt_entry_t)))
/* PTE access inline fuctions */
/*
* Get the machine address of the pointed pte
* We use hardware MMU to get value so works only for levels 1-3
*/
static __inline paddr_t
xpmap_ptetomach(pt_entry_t *pte)
{
pt_entry_t *up_pte;
vaddr_t va = (vaddr_t) pte;
va = ((va & XPTE_MASK) >> XPTE_SHIFT) | (vaddr_t) PTE_BASE;
up_pte = (pt_entry_t *) va;
return (paddr_t) (((*up_pte) & PG_FRAME) + (((vaddr_t) pte) & (~PG_FRAME & ~VA_SIGN_MASK)));
}
/* Xen helpers to change bits of a pte */
#define XPMAP_UPDATE_DIRECT 1 /* Update direct map entry flags too */
paddr_t vtomach(vaddr_t);
#define vtomfn(va) (vtomach(va) >> PAGE_SHIFT)
#endif /* XEN */
/* pmap functions with machine addresses */
void pmap_kenter_ma(vaddr_t, paddr_t, vm_prot_t, u_int);
int pmap_enter_ma(struct pmap *, vaddr_t, paddr_t, paddr_t,
vm_prot_t, u_int, int);
bool pmap_extract_ma(pmap_t, vaddr_t, paddr_t *);
/*
* Hooks for the pool allocator.
*/
#define POOL_VTOPHYS(va) vtophys((vaddr_t) (va))
#ifdef __HAVE_DIRECT_MAP
#define L4_SLOT_DIRECT 509
#define PDIR_SLOT_DIRECT L4_SLOT_DIRECT
#define PMAP_DIRECT_BASE (VA_SIGN_NEG((L4_SLOT_DIRECT * NBPD_L4)))
#define PMAP_DIRECT_END (VA_SIGN_NEG(((L4_SLOT_DIRECT + 1) * NBPD_L4)))
#define PMAP_DIRECT_MAP(pa) ((vaddr_t)PMAP_DIRECT_BASE + (pa))
#define PMAP_DIRECT_UNMAP(va) ((paddr_t)(va) - PMAP_DIRECT_BASE)
/*
* Alternate mapping hooks for pool pages.
*/
#define PMAP_MAP_POOLPAGE(pa) PMAP_DIRECT_MAP((pa))
#define PMAP_UNMAP_POOLPAGE(va) PMAP_DIRECT_UNMAP((va))
void pagezero(vaddr_t);
#endif /* __HAVE_DIRECT_MAP */
#endif /* _KERNEL */
#endif /* _X86_PMAP_H_ */
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