diff options
Diffstat (limited to 'sys/arch/vax/include/pmap.h')
| -rw-r--r-- | sys/arch/vax/include/pmap.h | 125 |
1 files changed, 75 insertions, 50 deletions
diff --git a/sys/arch/vax/include/pmap.h b/sys/arch/vax/include/pmap.h index 3022c97e207..412aefaff0f 100644 --- a/sys/arch/vax/include/pmap.h +++ b/sys/arch/vax/include/pmap.h @@ -1,5 +1,5 @@ -/* $OpenBSD: pmap.h,v 1.8 1998/03/01 12:09:02 maja Exp $ */ -/* $NetBSD: pmap.h,v 1.19 1997/07/06 22:38:29 ragge Exp $ */ +/* $OpenBSD: pmap.h,v 1.9 2000/04/26 03:08:42 bjc Exp $ */ +/* $NetBSD: pmap.h,v 1.37 1999/08/01 13:48:07 ragge Exp $ */ /* * Copyright (c) 1987 Carnegie-Mellon University @@ -44,28 +44,37 @@ */ -#ifndef PMAP_H -#define PMAP_H +#ifndef PMAP_H +#define PMAP_H +#include <machine/types.h> +#include <machine/pte.h> #include <machine/mtpr.h> +#include <machine/pcb.h> - -#define VAX_PAGE_SIZE NBPG -#define VAX_SEG_SIZE NBSEG +/* + * Some constants to make life easier. + */ +#define LTOHPS (PGSHIFT - VAX_PGSHIFT) +#define LTOHPN (1 << LTOHPS) +#define USRPTSIZE ((MAXTSIZ + MAXDSIZ + MAXSSIZ + MMAPSPACE) / VAX_NBPG) +#define NPTEPGS (USRPTSIZE / (sizeof(struct pte) * LTOHPN)) /* - * Pmap structure - * - * p0br == PR_P0BR in user struct, p0br is also == SBR in pmap_kernel() - * p1br is the same for stack space, stack is base of alloced pte mem + * Pmap structure + * pm_stack holds lowest allocated memory for the process stack. */ typedef struct pmap { - vm_offset_t pm_stack; /* Base of alloced p1 pte space */ - struct pcb *pm_pcb; /* Pointer to PCB for this pmap */ - int ref_count; /* reference count */ - struct pmap_statistics stats; /* statistics */ - simple_lock_data_t pm_lock; /* lock on pmap */ + vaddr_t pm_stack; /* Base of alloced p1 pte space */ + int ref_count; /* reference count */ + struct pte *pm_p0br; /* page 0 base register */ + long pm_p0lr; /* page 0 length register */ + struct pte *pm_p1br; /* page 1 base register */ + long pm_p1lr; /* page 1 length register */ + int pm_lock; /* Lock entry in MP environment */ + struct pmap_statistics pm_stats; /* Some statistics */ + u_char pm_refcnt[NPTEPGS]; /* Refcount per pte page */ } *pmap_t; /* @@ -73,55 +82,71 @@ typedef struct pmap { * mappings of that page. An entry is a pv_entry_t, the list is pv_table. */ -typedef struct pv_entry { - struct pv_entry *pv_next; /* next pv_entry */ - struct pmap *pv_pmap;/* if not NULL, pmap where mapping lies */ - vm_offset_t pv_va; /* virtual address for mapping */ - int pv_flags; /* flags */ -} *pv_entry_t; - -#define PV_REF 0x00000001 /* Simulated phys ref bit */ - -#define PHYS_TO_PV(phys_page) (&pv_table[((phys_page)>>PAGE_SHIFT)]) +struct pv_entry { + struct pv_entry *pv_next; /* next pv_entry */ + struct pte *pv_pte; /* pte for this physical page */ + struct pmap *pv_pmap; /* pmap this entry belongs to */ + int pv_attr; /* write/modified bits */ +}; /* ROUND_PAGE used before vm system is initialized */ -#define ROUND_PAGE(x) (((uint)(x) + PAGE_SIZE-1)& ~(PAGE_SIZE - 1)) -#define TRUNC_PAGE(x) ((uint)(x) & ~(PAGE_SIZE - 1)) +#define ROUND_PAGE(x) (((uint)(x) + PGOFSET) & ~PGOFSET) +#define TRUNC_PAGE(x) ((uint)(x) & ~PGOFSET) /* Mapping macros used when allocating SPT */ -#define MAPVIRT(ptr, count) \ +#define MAPVIRT(ptr, count) \ (vm_offset_t)ptr = virtual_avail; \ - virtual_avail += (count) * NBPG; + virtual_avail += (count) * VAX_NBPG; -#define MAPPHYS(ptr, count, perm) \ - pmap_map(virtual_avail, avail_start, avail_start + \ - (count) * NBPG, perm); \ - (vm_offset_t)ptr = virtual_avail; \ - virtual_avail += (count) * NBPG; \ - avail_start += (count) * NBPG; +#define MAPPHYS(ptr, count, perm) \ + (vm_offset_t)ptr = avail_start + KERNBASE; \ + avail_start += (count) * VAX_NBPG; #ifdef _KERNEL -#define pa_index(pa) atop(pa) -#define pa_to_pvh(pa) (&pv_table[atop(pa)]) extern struct pmap kernel_pmap_store; -#define pmap_kernel() (&kernel_pmap_store) +#define pmap_kernel() (&kernel_pmap_store) -#endif /* _KERNEL */ +/* + * Real nice (fast) routines to get the virtual address of a physical page + * (and vice versa). + */ +#define PMAP_MAP_POOLPAGE(pa) ((pa) | KERNBASE) +#define PMAP_UNMAP_POOLPAGE(va) ((va) & ~KERNBASE) + +#define PMAP_STEAL_MEMORY + +/* + * This is the by far most used pmap routine. Make it inline. + */ /* Routines that are best to define as macros */ -#define pmap_copy(a,b,c,d,e) /* Dont do anything */ -#define pmap_update() mtpr(0,PR_TBIA) /* Update buffes */ -#define pmap_pageable(a,b,c,d) /* Dont do anything */ -#define pmap_collect(pmap) /* No need so far */ -#define pmap_reference(pmap) if(pmap) (pmap)->ref_count++ -#define pmap_pinit(pmap) (pmap)->ref_count=1; -#define pmap_phys_address(phys) ((u_int)(phys)<<PAGE_SHIFT) +#define pmap_phys_address(phys) ((u_int)(phys) << PGSHIFT) +#define pmap_unwire(pmap, v) /* no need */ +#define pmap_copy(a,b,c,d,e) /* Dont do anything */ +#define pmap_update() mtpr(0,PR_TBIA) /* Update buffes */ +#define pmap_collect(pmap) /* No need so far */ +#define pmap_remove(pmap, start, slut) pmap_protect(pmap, start, slut, 0) +#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) +#define pmap_deactivate(p) /* Dont do anything */ +#define pmap_reference(pmap) (pmap)->ref_count++ + +/* These can be done as efficient inline macros */ +#define pmap_copy_page(src, dst) \ + __asm__("addl3 $0x80000000,%0,r0;addl3 $0x80000000,%1,r1; \ + movc3 $4096,(r0),(r1)" \ + :: "r"(src),"r"(dst):"r0","r1","r2","r3","r4","r5"); + +#define pmap_zero_page(phys) \ + __asm__("addl3 $0x80000000,%0,r0;movc5 $0,(r0),$0,$4096,(r0)" \ + :: "r"(phys): "r0","r1","r2","r3","r4","r5"); /* Prototypes */ void pmap_bootstrap __P((void)); -vm_offset_t pmap_map __P((vm_offset_t, vm_offset_t, vm_offset_t, int)); -void pmap_expandp0 __P((struct pmap *, int)); -void pmap_expandp1 __P((struct pmap *)); +vaddr_t pmap_map __P((vm_offset_t, vm_offset_t, vm_offset_t, int)); +void pmap_pinit __P((pmap_t)); + +#endif /* _KERNEL */ + #endif PMAP_H |