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Diffstat (limited to 'sysutils/xosview/files/arm32-pmap.h')
-rw-r--r-- | sysutils/xosview/files/arm32-pmap.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/sysutils/xosview/files/arm32-pmap.h b/sysutils/xosview/files/arm32-pmap.h new file mode 100644 index 00000000000..44321ac53fb --- /dev/null +++ b/sysutils/xosview/files/arm32-pmap.h @@ -0,0 +1,186 @@ +/* $NetBSD: arm32-pmap.h,v 1.1 1998/11/04 16:37:11 agc Exp $ */ + +/* + * Copyright (c) 1994,1995 Mark Brinicombe. + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Mark Brinicombe + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * 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. + */ + +#ifndef _ARM32_PMAP_H_ +#define _ARM32_PMAP_H_ + +#include <machine/cpufunc.h> +#include <machine/pte.h> + +/* + * Data structures used by pmap + */ + +/* + * Structure that describes a Level 1 page table and the flags + * associated with it. + */ +struct l1pt { + SIMPLEQ_ENTRY(l1pt) pt_queue; /* Queue pointers */ + struct pglist pt_plist; /* Allocated page list */ + vm_offset_t pt_va; /* Allocated virtual address */ + int pt_flags; /* Flags */ +}; +#define PTFLAG_STATIC 1 /* Statically allocated */ +#define PTFLAG_KPT 2 /* Kernel pt's are mapped */ +#define PTFLAG_CLEAN 4 /* L1 is clean */ + +/* + * The pmap structure itself. + */ +struct pmap { + pd_entry_t *pm_pdir; /* KVA of page directory */ + struct l1pt *pm_l1pt; /* L1 descriptor */ + void *pm_unused1; /* Reserved for l2 map */ + vm_offset_t pm_pptpt; /* PA of pt's page table */ + vm_offset_t pm_vptpt; /* VA of pt's page table */ + short pm_dref; /* page directory ref count */ + short pm_count; /* pmap reference count */ + simple_lock_data_t pm_lock; /* lock on pmap */ + struct pmap_statistics pm_stats; /* pmap statistics */ +}; + +typedef struct pmap *pmap_t; + +/* + * 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 { + struct pv_entry *pv_next; /* next pv_entry */ + pmap_t pv_pmap; /* pmap where mapping lies */ + vm_offset_t pv_va; /* virtual address for mapping */ + int pv_flags; /* flags */ +} *pv_entry_t; + +/* + * A pv_page_info struture looks like this. It is used to contain status + * information for pv_entry freelists. + */ +struct pv_page; + +struct pv_page_info { + TAILQ_ENTRY(pv_page) pgi_list; + struct pv_entry *pgi_freelist; + int pgi_nfree; +}; + +/* + * A pv_page itself looks like this. pv_entries are requested from the VM a + * pv_page at a time. + * + * We also define a macro that states the number of pv_entries per page + * allocated. + */ +#define NPVPPG ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry)) + +struct pv_page { + struct pv_page_info pvp_pgi; + struct pv_entry pvp_pv[NPVPPG]; +}; + +/* + * Page hooks. I'll eliminate these sometime soon :-) + * + * For speed we store the both the virtual address and the page table + * entry address for each page hook. + */ +typedef struct { + vm_offset_t va; + pt_entry_t *pte; +} pagehook_t; + +/* + * Physical / virtual address structure. In a number of places (particularly + * during bootstrapping) we need to keep track of the physical and virtual + * addresses of various pages + */ +typedef struct { + vm_offset_t physical; + vm_offset_t virt; +} pv_addr_t; + +/* + * _KERNEL specific macros, functions and prototypes + */ + +#ifdef _KERNEL + +/* + * Commonly referenced structures + */ +extern pv_entry_t pv_table; /* Phys to virt mappings, per page. */ +extern pmap_t kernel_pmap; /* pmap pointer used for the kernel */ +extern struct pmap kernel_pmap_store; /* kernel_pmap points to this */ + +/* + * Macros that we need to export + */ +#define pmap_kernel() (&kernel_pmap_store) +#define pmap_update() /*cpu_tlb_flushID()*/ +#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) + +#define pmap_phys_address(ppn) (arm_page_to_byte((ppn))) + +/* + * Functions that we need to export + */ +extern boolean_t pmap_testbit __P((vm_offset_t, int)); +extern void pmap_changebit __P((vm_offset_t, int, int)); +extern vm_offset_t pmap_map __P((vm_offset_t, vm_offset_t, vm_offset_t, int)); + +#endif /* _KERNEL */ + +/* + * Useful macros and constants + */ + +/* Virtual address to page table entry */ +#define vtopte(va) \ + ((pt_entry_t *)(PROCESS_PAGE_TBLS_BASE + \ + (arm_byte_to_page((unsigned int)(va)) << 2))) + +/* Virtual address to physical address */ +#define vtophys(va) \ + ((*vtopte(va) & PG_FRAME) | ((unsigned int)(va) & ~PG_FRAME)) + +/* L1 and L2 page table macros */ +#define pmap_pde(m, v) (&((m)->pm_pdir[((vm_offset_t)(v) >> PDSHIFT)&4095])) +#define pmap_pte_pa(pte) (*(pte) & PG_FRAME) +#define pmap_pde_v(pde) (*(pde) != 0) +#define pmap_pte_v(pte) (*(pte) != 0) + +/* Size of the kernel part of the L1 page table */ +#define KERNEL_PD_SIZE \ + (PD_SIZE - (KERNEL_SPACE_START >> PDSHIFT) * sizeof(pd_entry_t)) + +#endif /* _ARM32_PMAP_H_ */ |