62f456b315
a struct pmap be the same on both SMP and UP kernels. It turns out that the size of a struct pmap is much larger on alpha SMP systems due to the number of pm_asn's being dependant on MAX_CPU. Since modules are supposed to be SMP agnostic, this has the affect of moving around the "interesting bits" of the vmspace (daddr, dsize) that the osf1 module wants to frob. So the module ends up scribbling in a pmap struct, and the user either sees a panic, or an application failure. While here, I've also shrunk MAXCPU to 8 now that it affects the size of pmap structs on UP systesm. This should be plenty, as I'm unware of any hardware we currently run in which supports more than 8 CPUs.
244 lines
7.6 KiB
C
244 lines
7.6 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 ASN_BITS 8
|
|
#define ASNGEN_BITS (32 - ASN_BITS)
|
|
#define ASNGEN_MASK ((1 << ASNGEN_BITS) - 1)
|
|
|
|
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 */
|
|
u_int32_t pm_active; /* active cpus */
|
|
struct {
|
|
u_int32_t asn:ASN_BITS; /* address space number */
|
|
u_int32_t gen:ASNGEN_BITS; /* generation number */
|
|
} pm_asn[MAXSMPCPU];
|
|
struct pmap_statistics pm_stats; /* pmap statistics */
|
|
struct vm_page *pm_ptphint; /* pmap ptp hint */
|
|
LIST_ENTRY(pmap) pm_list; /* list of all pmaps. */
|
|
};
|
|
|
|
#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list))
|
|
#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 struct pmap kernel_pmap_store;
|
|
#define kernel_pmap (&kernel_pmap_store)
|
|
#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;
|
|
|
|
#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 vm_offset_t virtual_avail;
|
|
extern vm_offset_t virtual_end;
|
|
|
|
struct vmspace;
|
|
|
|
vm_offset_t pmap_steal_memory(vm_size_t);
|
|
void pmap_bootstrap(vm_offset_t, u_int);
|
|
void pmap_kenter(vm_offset_t va, vm_offset_t pa);
|
|
void pmap_kremove(vm_offset_t);
|
|
void pmap_setdevram(unsigned long long basea, vm_offset_t sizea);
|
|
int pmap_uses_prom_console(void);
|
|
void *pmap_mapdev(vm_offset_t, vm_size_t);
|
|
void pmap_unmapdev(vm_offset_t, vm_size_t);
|
|
unsigned *pmap_pte(pmap_t, vm_offset_t) __pure2;
|
|
void pmap_set_opt (unsigned *);
|
|
void pmap_set_opt_bsp (void);
|
|
void pmap_deactivate(struct thread *td);
|
|
void pmap_emulate_reference(struct vmspace *vm, vm_offset_t v, int user, int write);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !LOCORE */
|
|
|
|
#endif /* !_MACHINE_PMAP_H_ */
|