245 lines
7.7 KiB
C
245 lines
7.7 KiB
C
/*
|
|
* Copyright (c) 1991 Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* the Systems Programming Group of the University of Utah Computer
|
|
* Science Department and William Jolitz of UUNET Technologies 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 by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
|
|
*
|
|
* Derived from hp300 version by Mike Hibler, this version by William
|
|
* Jolitz uses a recursive map [a pde points to the page directory] to
|
|
* map the page tables using the pagetables themselves. This is done to
|
|
* reduce the impact on kernel virtual memory for lots of sparse address
|
|
* space, and to reduce the cost of memory to each process.
|
|
*
|
|
* from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
|
|
* from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
|
|
* from: i386 pmap.h,v 1.54 1997/11/20 19:30:35 bde Exp
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_PMAP_H_
|
|
#define _MACHINE_PMAP_H_
|
|
|
|
/*
|
|
* Define meanings for a few software bits in the pte
|
|
*/
|
|
#define PG_V ALPHA_PTE_VALID
|
|
#define PG_FOR ALPHA_PTE_FAULT_ON_READ
|
|
#define PG_FOW ALPHA_PTE_FAULT_ON_WRITE
|
|
#define PG_FOE ALPHA_PTE_FAULT_ON_EXECUTE
|
|
#define PG_ASM ALPHA_PTE_ASM
|
|
#define PG_GH ALPHA_PTE_GRANULARITY
|
|
#define PG_KRE ALPHA_PTE_KR
|
|
#define PG_URE ALPHA_PTE_UR
|
|
#define PG_KWE ALPHA_PTE_KW
|
|
#define PG_UWE ALPHA_PTE_UW
|
|
#define PG_PROT ALPHA_PTE_PROT
|
|
#define PG_SHIFT 32
|
|
|
|
#define PG_W 0x00010000 /* software wired */
|
|
#define PG_MANAGED 0x00020000 /* software managed */
|
|
|
|
/*
|
|
* Pte related macros
|
|
*/
|
|
#define VADDR(l1, l2, l3) (((l1) << ALPHA_L1SHIFT) \
|
|
+ ((l2) << ALPHA_L2SHIFT) \
|
|
+ ((l3) << ALPHA_L3SHIFT)
|
|
|
|
#ifndef NKPT
|
|
#define NKPT 9 /* initial number of kernel page tables */
|
|
#endif
|
|
#define NKLEV2MAPS 255 /* max number of lev2 page tables */
|
|
#define NKLEV3MAPS (NKLEV2MAPS << ALPHA_PTSHIFT) /* max number of lev3 page tables */
|
|
|
|
/*
|
|
* The *PTDI values control the layout of virtual memory
|
|
*
|
|
* XXX This works for now, but I am not real happy with it, I'll fix it
|
|
* right after I fix locore.s and the magic 28K hole
|
|
*
|
|
* SMP_PRIVPAGES: The per-cpu address space is 0xff80000 -> 0xffbfffff
|
|
*/
|
|
#define PTLEV1I (NPTEPG-1) /* Lev0 entry that points to Lev0 */
|
|
#define K0SEGLEV1I (NPTEPG/2)
|
|
#define K1SEGLEV1I (K0SEGLEV1I+(NPTEPG/4))
|
|
|
|
#define NUSERLEV2MAPS (NPTEPG/2)
|
|
#define NUSERLEV3MAPS (NUSERLEV2MAPS << ALPHA_PTSHIFT)
|
|
|
|
#ifndef LOCORE
|
|
|
|
#include <sys/queue.h>
|
|
|
|
typedef alpha_pt_entry_t pt_entry_t;
|
|
|
|
#define PTESIZE sizeof(pt_entry_t) /* for assembly files */
|
|
|
|
/*
|
|
* Address of current address space page table maps
|
|
*/
|
|
#ifdef _KERNEL
|
|
extern pt_entry_t PTmap[]; /* lev3 page tables */
|
|
extern pt_entry_t PTlev2[]; /* lev2 page tables */
|
|
extern pt_entry_t PTlev1[]; /* lev1 page table */
|
|
extern pt_entry_t PTlev1pte; /* pte that maps lev1 page table */
|
|
#endif
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* virtual address to page table entry and
|
|
* to physical address.
|
|
* Note: this work recursively, thus vtopte of a pte will give
|
|
* the corresponding lev1 that in turn maps it.
|
|
*/
|
|
#define vtopte(va) (PTmap + (alpha_btop(va) \
|
|
& ((1 << 3*ALPHA_PTSHIFT)-1)))
|
|
|
|
/*
|
|
* Routine: pmap_kextract
|
|
* Function:
|
|
* Extract the physical page address associated
|
|
* kernel virtual address.
|
|
*/
|
|
static __inline vm_offset_t
|
|
pmap_kextract(vm_offset_t va)
|
|
{
|
|
vm_offset_t pa;
|
|
if (va >= ALPHA_K0SEG_BASE && va <= ALPHA_K0SEG_END)
|
|
pa = ALPHA_K0SEG_TO_PHYS(va);
|
|
else
|
|
pa = alpha_ptob(ALPHA_PTE_TO_PFN(*vtopte(va)))
|
|
| (va & PAGE_MASK);
|
|
return pa;
|
|
}
|
|
|
|
#define vtophys(va) pmap_kextract(((vm_offset_t) (va)))
|
|
|
|
extern vm_offset_t alpha_XXX_dmamap_or;
|
|
|
|
static __inline vm_offset_t
|
|
alpha_XXX_dmamap(vm_offset_t va)
|
|
{
|
|
return (pmap_kextract(va) | alpha_XXX_dmamap_or);
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
/*
|
|
* Pmap stuff
|
|
*/
|
|
struct pv_entry;
|
|
|
|
struct md_page {
|
|
int pv_list_count;
|
|
int pv_flags;
|
|
TAILQ_HEAD(,pv_entry) pv_list;
|
|
};
|
|
|
|
#define PV_TABLE_MOD 0x01 /* modified */
|
|
#define PV_TABLE_REF 0x02 /* referenced */
|
|
|
|
struct pmap {
|
|
pt_entry_t *pm_lev1; /* KVA of lev0map */
|
|
vm_object_t pm_pteobj; /* Container for pte's */
|
|
TAILQ_HEAD(,pv_entry) pm_pvlist; /* list of mappings in pmap */
|
|
int pm_count; /* reference count */
|
|
int pm_flags; /* pmap flags */
|
|
u_int32_t pm_active; /* active cpus */
|
|
struct {
|
|
u_int32_t asn:8; /* address space number */
|
|
u_int32_t gen:24; /* generation number */
|
|
} pm_asn[MAXCPU];
|
|
struct pmap_statistics pm_stats; /* pmap statistics */
|
|
struct vm_page *pm_ptphint; /* pmap ptp hint */
|
|
};
|
|
|
|
#define pmap_resident_count(pmap) (pmap)->pm_stats.resident_count
|
|
|
|
#define PM_FLAG_LOCKED 0x1
|
|
#define PM_FLAG_WANTED 0x2
|
|
|
|
typedef struct pmap *pmap_t;
|
|
|
|
#ifdef _KERNEL
|
|
extern pmap_t kernel_pmap;
|
|
#endif
|
|
|
|
/*
|
|
* For each vm_page_t, there is a list of all currently valid virtual
|
|
* mappings of that page. An entry is a pv_entry_t, the list is pv_table.
|
|
*/
|
|
typedef struct pv_entry {
|
|
pmap_t pv_pmap; /* pmap where mapping lies */
|
|
vm_offset_t pv_va; /* virtual address for mapping */
|
|
TAILQ_ENTRY(pv_entry) pv_list;
|
|
TAILQ_ENTRY(pv_entry) pv_plist;
|
|
vm_page_t pv_ptem; /* VM page for pte */
|
|
} *pv_entry_t;
|
|
|
|
#define PV_ENTRY_NULL ((pv_entry_t) 0)
|
|
|
|
#define PV_CI 0x01 /* all entries must be cache inhibited */
|
|
#define PV_PTPAGE 0x02 /* entry maps a page table page */
|
|
|
|
#ifdef _KERNEL
|
|
|
|
extern caddr_t CADDR1;
|
|
extern pt_entry_t *CMAP1;
|
|
extern vm_offset_t avail_end;
|
|
extern vm_offset_t avail_start;
|
|
extern vm_offset_t clean_eva;
|
|
extern vm_offset_t clean_sva;
|
|
extern vm_offset_t phys_avail[];
|
|
extern char *ptvmmap; /* poor name! */
|
|
extern vm_offset_t virtual_avail;
|
|
extern vm_offset_t virtual_end;
|
|
|
|
vm_offset_t pmap_steal_memory __P((vm_size_t));
|
|
void pmap_bootstrap __P((vm_offset_t, u_int));
|
|
void pmap_setdevram __P((unsigned long long basea, vm_offset_t sizea));
|
|
int pmap_uses_prom_console __P((void));
|
|
pmap_t pmap_kernel __P((void));
|
|
void *pmap_mapdev __P((vm_offset_t, vm_size_t));
|
|
unsigned *pmap_pte __P((pmap_t, vm_offset_t)) __pure2;
|
|
vm_page_t pmap_use_pt __P((pmap_t, vm_offset_t));
|
|
void pmap_set_opt __P((unsigned *));
|
|
void pmap_set_opt_bsp __P((void));
|
|
void pmap_deactivate __P((struct proc *p));
|
|
void pmap_emulate_reference __P((struct proc *p, vm_offset_t v, int user, int write));
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !LOCORE */
|
|
|
|
#endif /* !_MACHINE_PMAP_H_ */
|