pgtable.h
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- /* $Id: pgtable.h,v 1.109 2001/11/13 00:49:32 davem Exp $ */
- #ifndef _SPARC_PGTABLE_H
- #define _SPARC_PGTABLE_H
- /* asm-sparc/pgtable.h: Defines and functions used to work
- * with Sparc page tables.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- */
- #include <linux/config.h>
- #include <linux/spinlock.h>
- #include <asm/asi.h>
- #ifdef CONFIG_SUN4
- #include <asm/pgtsun4.h>
- #else
- #include <asm/pgtsun4c.h>
- #endif
- #include <asm/pgtsrmmu.h>
- #include <asm/vac-ops.h>
- #include <asm/oplib.h>
- #include <asm/sbus.h>
- #include <asm/btfixup.h>
- #include <asm/system.h>
- #ifndef __ASSEMBLY__
- extern void load_mmu(void);
- extern unsigned long calc_highpages(void);
-
- BTFIXUPDEF_CALL(void, quick_kernel_fault, unsigned long)
- #define quick_kernel_fault(addr) BTFIXUP_CALL(quick_kernel_fault)(addr)
- /* Routines for data transfer buffers. */
- BTFIXUPDEF_CALL(char *, mmu_lockarea, char *, unsigned long)
- BTFIXUPDEF_CALL(void, mmu_unlockarea, char *, unsigned long)
- #define mmu_lockarea(vaddr,len) BTFIXUP_CALL(mmu_lockarea)(vaddr,len)
- #define mmu_unlockarea(vaddr,len) BTFIXUP_CALL(mmu_unlockarea)(vaddr,len)
- /* These are implementations for sbus_map_sg/sbus_unmap_sg... collapse later */
- BTFIXUPDEF_CALL(__u32, mmu_get_scsi_one, char *, unsigned long, struct sbus_bus *sbus)
- BTFIXUPDEF_CALL(void, mmu_get_scsi_sgl, struct scatterlist *, int, struct sbus_bus *sbus)
- BTFIXUPDEF_CALL(void, mmu_release_scsi_one, __u32, unsigned long, struct sbus_bus *sbus)
- BTFIXUPDEF_CALL(void, mmu_release_scsi_sgl, struct scatterlist *, int, struct sbus_bus *sbus)
- #define mmu_get_scsi_one(vaddr,len,sbus) BTFIXUP_CALL(mmu_get_scsi_one)(vaddr,len,sbus)
- #define mmu_get_scsi_sgl(sg,sz,sbus) BTFIXUP_CALL(mmu_get_scsi_sgl)(sg,sz,sbus)
- #define mmu_release_scsi_one(vaddr,len,sbus) BTFIXUP_CALL(mmu_release_scsi_one)(vaddr,len,sbus)
- #define mmu_release_scsi_sgl(sg,sz,sbus) BTFIXUP_CALL(mmu_release_scsi_sgl)(sg,sz,sbus)
- /*
- * mmu_map/unmap are provided by iommu/iounit; Invalid to call on IIep.
- */
- BTFIXUPDEF_CALL(void, mmu_map_dma_area, unsigned long va, __u32 addr, int len)
- BTFIXUPDEF_CALL(unsigned long /*phys*/, mmu_translate_dvma, unsigned long busa)
- BTFIXUPDEF_CALL(void, mmu_unmap_dma_area, unsigned long busa, int len)
- #define mmu_map_dma_area(va, ba,len) BTFIXUP_CALL(mmu_map_dma_area)(va,ba,len)
- #define mmu_unmap_dma_area(ba,len) BTFIXUP_CALL(mmu_unmap_dma_area)(ba,len)
- #define mmu_translate_dvma(ba) BTFIXUP_CALL(mmu_translate_dvma)(ba)
- BTFIXUPDEF_SIMM13(pmd_shift)
- BTFIXUPDEF_SETHI(pmd_size)
- BTFIXUPDEF_SETHI(pmd_mask)
- extern unsigned int pmd_align(unsigned int addr) __attribute__((const));
- extern __inline__ unsigned int pmd_align(unsigned int addr)
- {
- return ((addr + ~BTFIXUP_SETHI(pmd_mask)) & BTFIXUP_SETHI(pmd_mask));
- }
- BTFIXUPDEF_SIMM13(pgdir_shift)
- BTFIXUPDEF_SETHI(pgdir_size)
- BTFIXUPDEF_SETHI(pgdir_mask)
- extern unsigned int pgdir_align(unsigned int addr) __attribute__((const));
- extern __inline__ unsigned int pgdir_align(unsigned int addr)
- {
- return ((addr + ~BTFIXUP_SETHI(pgdir_mask)) & BTFIXUP_SETHI(pgdir_mask));
- }
- BTFIXUPDEF_SIMM13(ptrs_per_pte)
- BTFIXUPDEF_SIMM13(ptrs_per_pmd)
- BTFIXUPDEF_SIMM13(ptrs_per_pgd)
- BTFIXUPDEF_SIMM13(user_ptrs_per_pgd)
- #define VMALLOC_VMADDR(x) ((unsigned long)(x))
- #define pte_ERROR(e) __builtin_trap()
- #define pmd_ERROR(e) __builtin_trap()
- #define pgd_ERROR(e) __builtin_trap()
- BTFIXUPDEF_INT(page_none)
- BTFIXUPDEF_INT(page_shared)
- BTFIXUPDEF_INT(page_copy)
- BTFIXUPDEF_INT(page_readonly)
- BTFIXUPDEF_INT(page_kernel)
- #define PMD_SHIFT BTFIXUP_SIMM13(pmd_shift)
- #define PMD_SIZE BTFIXUP_SETHI(pmd_size)
- #define PMD_MASK BTFIXUP_SETHI(pmd_mask)
- #define PMD_ALIGN(addr) pmd_align(addr)
- #define PGDIR_SHIFT BTFIXUP_SIMM13(pgdir_shift)
- #define PGDIR_SIZE BTFIXUP_SETHI(pgdir_size)
- #define PGDIR_MASK BTFIXUP_SETHI(pgdir_mask)
- #define PGDIR_ALIGN pgdir_align(addr)
- #define PTRS_PER_PTE BTFIXUP_SIMM13(ptrs_per_pte)
- #define PTRS_PER_PMD BTFIXUP_SIMM13(ptrs_per_pmd)
- #define PTRS_PER_PGD BTFIXUP_SIMM13(ptrs_per_pgd)
- #define USER_PTRS_PER_PGD BTFIXUP_SIMM13(user_ptrs_per_pgd)
- #define FIRST_USER_PGD_NR 0
- #define PAGE_NONE __pgprot(BTFIXUP_INT(page_none))
- #define PAGE_SHARED __pgprot(BTFIXUP_INT(page_shared))
- #define PAGE_COPY __pgprot(BTFIXUP_INT(page_copy))
- #define PAGE_READONLY __pgprot(BTFIXUP_INT(page_readonly))
- extern unsigned long page_kernel;
- #ifdef MODULE
- #define PAGE_KERNEL page_kernel
- #else
- #define PAGE_KERNEL __pgprot(BTFIXUP_INT(page_kernel))
- #endif
- /* Top-level page directory */
- extern pgd_t swapper_pg_dir[1024];
- /* Page table for 0-4MB for everybody, on the Sparc this
- * holds the same as on the i386.
- */
- extern pte_t pg0[1024];
- extern pte_t pg1[1024];
- extern pte_t pg2[1024];
- extern pte_t pg3[1024];
- extern unsigned long ptr_in_current_pgd;
- /* Here is a trick, since mmap.c need the initializer elements for
- * protection_map[] to be constant at compile time, I set the following
- * to all zeros. I set it to the real values after I link in the
- * appropriate MMU page table routines at boot time.
- */
- #define __P000 __pgprot(0)
- #define __P001 __pgprot(0)
- #define __P010 __pgprot(0)
- #define __P011 __pgprot(0)
- #define __P100 __pgprot(0)
- #define __P101 __pgprot(0)
- #define __P110 __pgprot(0)
- #define __P111 __pgprot(0)
- #define __S000 __pgprot(0)
- #define __S001 __pgprot(0)
- #define __S010 __pgprot(0)
- #define __S011 __pgprot(0)
- #define __S100 __pgprot(0)
- #define __S101 __pgprot(0)
- #define __S110 __pgprot(0)
- #define __S111 __pgprot(0)
- extern int num_contexts;
- /* First physical page can be anywhere, the following is needed so that
- * va-->pa and vice versa conversions work properly without performance
- * hit for all __pa()/__va() operations.
- */
- extern unsigned long phys_base;
- /*
- * BAD_PAGETABLE is used when we need a bogus page-table, while
- * BAD_PAGE is used for a bogus page.
- *
- * ZERO_PAGE is a global shared page that is always zero: used
- * for zero-mapped memory areas etc..
- */
- extern pte_t * __bad_pagetable(void);
- extern pte_t __bad_page(void);
- extern unsigned long empty_zero_page;
- #define BAD_PAGETABLE __bad_pagetable()
- #define BAD_PAGE __bad_page()
- #define ZERO_PAGE(vaddr) (mem_map + (((unsigned long)&empty_zero_page - PAGE_OFFSET + phys_base) >> PAGE_SHIFT))
- /* number of bits that fit into a memory pointer */
- #define BITS_PER_PTR (8*sizeof(unsigned long))
- /* to align the pointer to a pointer address */
- #define PTR_MASK (~(sizeof(void*)-1))
- #define SIZEOF_PTR_LOG2 2
- BTFIXUPDEF_CALL_CONST(unsigned long, pmd_page, pmd_t)
- BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page, pgd_t)
- #define pmd_page(pmd) BTFIXUP_CALL(pmd_page)(pmd)
- #define pgd_page(pgd) BTFIXUP_CALL(pgd_page)(pgd)
- BTFIXUPDEF_SETHI(none_mask)
- BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t)
- BTFIXUPDEF_CALL(void, pte_clear, pte_t *)
- extern __inline__ int pte_none(pte_t pte)
- {
- return !(pte_val(pte) & ~BTFIXUP_SETHI(none_mask));
- }
- #define pte_present(pte) BTFIXUP_CALL(pte_present)(pte)
- #define pte_clear(pte) BTFIXUP_CALL(pte_clear)(pte)
- BTFIXUPDEF_CALL_CONST(int, pmd_bad, pmd_t)
- BTFIXUPDEF_CALL_CONST(int, pmd_present, pmd_t)
- BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *)
- extern __inline__ int pmd_none(pmd_t pmd)
- {
- return !(pmd_val(pmd) & ~BTFIXUP_SETHI(none_mask));
- }
- #define pmd_bad(pmd) BTFIXUP_CALL(pmd_bad)(pmd)
- #define pmd_present(pmd) BTFIXUP_CALL(pmd_present)(pmd)
- #define pmd_clear(pmd) BTFIXUP_CALL(pmd_clear)(pmd)
- BTFIXUPDEF_CALL_CONST(int, pgd_none, pgd_t)
- BTFIXUPDEF_CALL_CONST(int, pgd_bad, pgd_t)
- BTFIXUPDEF_CALL_CONST(int, pgd_present, pgd_t)
- BTFIXUPDEF_CALL(void, pgd_clear, pgd_t *)
- #define pgd_none(pgd) BTFIXUP_CALL(pgd_none)(pgd)
- #define pgd_bad(pgd) BTFIXUP_CALL(pgd_bad)(pgd)
- #define pgd_present(pgd) BTFIXUP_CALL(pgd_present)(pgd)
- #define pgd_clear(pgd) BTFIXUP_CALL(pgd_clear)(pgd)
- /*
- * The following only work if pte_present() is true.
- * Undefined behaviour if not..
- */
- BTFIXUPDEF_HALF(pte_writei)
- BTFIXUPDEF_HALF(pte_dirtyi)
- BTFIXUPDEF_HALF(pte_youngi)
- extern int pte_write(pte_t pte) __attribute__((const));
- extern __inline__ int pte_write(pte_t pte)
- {
- return pte_val(pte) & BTFIXUP_HALF(pte_writei);
- }
- extern int pte_dirty(pte_t pte) __attribute__((const));
- extern __inline__ int pte_dirty(pte_t pte)
- {
- return pte_val(pte) & BTFIXUP_HALF(pte_dirtyi);
- }
- extern int pte_young(pte_t pte) __attribute__((const));
- extern __inline__ int pte_young(pte_t pte)
- {
- return pte_val(pte) & BTFIXUP_HALF(pte_youngi);
- }
- BTFIXUPDEF_HALF(pte_wrprotecti)
- BTFIXUPDEF_HALF(pte_mkcleani)
- BTFIXUPDEF_HALF(pte_mkoldi)
- extern pte_t pte_wrprotect(pte_t pte) __attribute__((const));
- extern __inline__ pte_t pte_wrprotect(pte_t pte)
- {
- return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_wrprotecti));
- }
- extern pte_t pte_mkclean(pte_t pte) __attribute__((const));
- extern __inline__ pte_t pte_mkclean(pte_t pte)
- {
- return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkcleani));
- }
- extern pte_t pte_mkold(pte_t pte) __attribute__((const));
- extern __inline__ pte_t pte_mkold(pte_t pte)
- {
- return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkoldi));
- }
- BTFIXUPDEF_CALL_CONST(pte_t, pte_mkwrite, pte_t)
- BTFIXUPDEF_CALL_CONST(pte_t, pte_mkdirty, pte_t)
- BTFIXUPDEF_CALL_CONST(pte_t, pte_mkyoung, pte_t)
- #define pte_mkwrite(pte) BTFIXUP_CALL(pte_mkwrite)(pte)
- #define pte_mkdirty(pte) BTFIXUP_CALL(pte_mkdirty)(pte)
- #define pte_mkyoung(pte) BTFIXUP_CALL(pte_mkyoung)(pte)
- #define page_pte_prot(page, prot) mk_pte(page, prot)
- #define page_pte(page) page_pte_prot(page, __pgprot(0))
- /* Permanent address of a page. */
- #define page_address(page) ((page)->virtual)
- BTFIXUPDEF_CALL(struct page *, pte_page, pte_t)
- #define pte_page(pte) BTFIXUP_CALL(pte_page)(pte)
- /*
- * Conversion functions: convert a page and protection to a page entry,
- * and a page entry and page directory to the page they refer to.
- */
- BTFIXUPDEF_CALL_CONST(pte_t, mk_pte, struct page *, pgprot_t)
- BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_phys, unsigned long, pgprot_t)
- BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_io, unsigned long, pgprot_t, int)
- #define mk_pte(page,pgprot) BTFIXUP_CALL(mk_pte)(page,pgprot)
- #define mk_pte_phys(page,pgprot) BTFIXUP_CALL(mk_pte_phys)(page,pgprot)
- #define mk_pte_io(page,pgprot,space) BTFIXUP_CALL(mk_pte_io)(page,pgprot,space)
- BTFIXUPDEF_CALL(void, pgd_set, pgd_t *, pmd_t *)
- BTFIXUPDEF_CALL(void, pmd_set, pmd_t *, pte_t *)
- #define pgd_set(pgdp,pmdp) BTFIXUP_CALL(pgd_set)(pgdp,pmdp)
- #define pmd_set(pmdp,ptep) BTFIXUP_CALL(pmd_set)(pmdp,ptep)
- BTFIXUPDEF_INT(pte_modify_mask)
- extern pte_t pte_modify(pte_t pte, pgprot_t newprot) __attribute__((const));
- extern __inline__ pte_t pte_modify(pte_t pte, pgprot_t newprot)
- {
- return __pte((pte_val(pte) & BTFIXUP_INT(pte_modify_mask)) |
- pgprot_val(newprot));
- }
- #define pgd_index(address) ((address) >> PGDIR_SHIFT)
- /* to find an entry in a page-table-directory */
- #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
- /* to find an entry in a kernel page-table-directory */
- #define pgd_offset_k(address) pgd_offset(&init_mm, address)
- BTFIXUPDEF_CALL(pmd_t *, pmd_offset, pgd_t *, unsigned long)
- BTFIXUPDEF_CALL(pte_t *, pte_offset, pmd_t *, unsigned long)
- /* Find an entry in the second-level page table.. */
- #define pmd_offset(dir,addr) BTFIXUP_CALL(pmd_offset)(dir,addr)
- /* Find an entry in the third-level page table.. */
- #define pte_offset(dir,addr) BTFIXUP_CALL(pte_offset)(dir,addr)
- /* The permissions for pgprot_val to make a page mapped on the obio space */
- extern unsigned int pg_iobits;
- #define flush_icache_page(vma, pg) do { } while(0)
- /* Certain architectures need to do special things when pte's
- * within a page table are directly modified. Thus, the following
- * hook is made available.
- */
- BTFIXUPDEF_CALL(void, set_pte, pte_t *, pte_t)
- #define set_pte(ptep,pteval) BTFIXUP_CALL(set_pte)(ptep,pteval)
- struct seq_file;
- BTFIXUPDEF_CALL(void, mmu_info, struct seq_file *)
- #define mmu_info(p) BTFIXUP_CALL(mmu_info)(p)
- /* Fault handler stuff... */
- #define FAULT_CODE_PROT 0x1
- #define FAULT_CODE_WRITE 0x2
- #define FAULT_CODE_USER 0x4
- BTFIXUPDEF_CALL(void, update_mmu_cache, struct vm_area_struct *, unsigned long, pte_t)
- #define update_mmu_cache(vma,addr,pte) BTFIXUP_CALL(update_mmu_cache)(vma,addr,pte)
- extern int invalid_segment;
- /* Encode and de-code a swap entry */
- #define SWP_TYPE(x) (((x).val >> 2) & 0x7f)
- #define SWP_OFFSET(x) (((x).val >> 9) & 0x3ffff)
- #define SWP_ENTRY(type,offset) ((swp_entry_t) { (((type) & 0x7f) << 2) | (((offset) & 0x3ffff) << 9) })
- #define pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
- #define swp_entry_to_pte(x) ((pte_t) { (x).val })
- struct ctx_list {
- struct ctx_list *next;
- struct ctx_list *prev;
- unsigned int ctx_number;
- struct mm_struct *ctx_mm;
- };
- extern struct ctx_list *ctx_list_pool; /* Dynamically allocated */
- extern struct ctx_list ctx_free; /* Head of free list */
- extern struct ctx_list ctx_used; /* Head of used contexts list */
- #define NO_CONTEXT -1
- extern __inline__ void remove_from_ctx_list(struct ctx_list *entry)
- {
- entry->next->prev = entry->prev;
- entry->prev->next = entry->next;
- }
- extern __inline__ void add_to_ctx_list(struct ctx_list *head, struct ctx_list *entry)
- {
- entry->next = head;
- (entry->prev = head->prev)->next = entry;
- head->prev = entry;
- }
- #define add_to_free_ctxlist(entry) add_to_ctx_list(&ctx_free, entry)
- #define add_to_used_ctxlist(entry) add_to_ctx_list(&ctx_used, entry)
- extern __inline__ unsigned long
- __get_phys (unsigned long addr)
- {
- switch (sparc_cpu_model){
- case sun4:
- case sun4c:
- return sun4c_get_pte (addr) << PAGE_SHIFT;
- case sun4m:
- case sun4d:
- return ((srmmu_get_pte (addr) & 0xffffff00) << 4);
- default:
- return 0;
- }
- }
- extern __inline__ int
- __get_iospace (unsigned long addr)
- {
- switch (sparc_cpu_model){
- case sun4:
- case sun4c:
- return -1; /* Don't check iospace on sun4c */
- case sun4m:
- case sun4d:
- return (srmmu_get_pte (addr) >> 28);
- default:
- return -1;
- }
- }
- extern unsigned long *sparc_valid_addr_bitmap;
- /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
- #define kern_addr_valid(addr)
- (test_bit(__pa((unsigned long)(addr))>>20, sparc_valid_addr_bitmap))
- extern int io_remap_page_range(unsigned long from, unsigned long to,
- unsigned long size, pgprot_t prot, int space);
- #include <asm-generic/pgtable.h>
- #endif /* !(__ASSEMBLY__) */
- /* We provide our own get_unmapped_area to cope with VA holes for userland */
- #define HAVE_ARCH_UNMAPPED_AREA
- /*
- * No page table caches to initialise
- */
- #define pgtable_cache_init() do { } while (0)
- #endif /* !(_SPARC_PGTABLE_H) */