/* $Id: pgtable.h,v 1.94 2000/03/28 06:07:25 anton 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 #include #include #ifdef CONFIG_SUN4 #include #else #include #endif #include #include #include #include #include #include #ifndef __ASSEMBLY__ extern void load_mmu(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. * mmu_flush/inval belong to CPU. Valid 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) BTFIXUPDEF_CALL(void, mmu_inval_dma_area, unsigned long virt, int len) BTFIXUPDEF_CALL(void, mmu_flush_dma_area, unsigned long virt, 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) #define mmu_inval_dma_area(va,len) BTFIXUP_CALL(mmu_inval_dma_area)(va,len) #define mmu_flush_dma_area(va,len) BTFIXUP_CALL(mmu_flush_dma_area)(va,len) 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)) /* This is the same accross all platforms */ #define VMALLOC_START (0xfe300000) #define VMALLOC_END ~0x0UL #if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8) #define pte_ERROR(e) __builtin_trap() #define pmd_ERROR(e) __builtin_trap() #define pgd_ERROR(e) __builtin_trap() #else #define pte_ERROR(e) \ printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) #define pmd_ERROR(e) \ printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) #define pgd_ERROR(e) \ printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) #endif 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)) #define PAGE_KERNEL __pgprot(BTFIXUP_INT(page_kernel)) /* 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; /* the no. of pointers that fit on a page: this will go away */ #define PTRS_PER_PAGE (PAGE_SIZE/sizeof(void*)) /* 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, pte_pagenr, pte_t) BTFIXUPDEF_CALL_CONST(unsigned long, pmd_page, pmd_t) BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page, pgd_t) #define pte_pagenr(pte) BTFIXUP_CALL(pte_pagenr)(pte) #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) ({ if (!(page)->virtual) BUG(); (page)->virtual; }) #define pte_page(x) (mem_map+pte_pagenr(x)) /* * 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 *) #define pgd_set(pgdp,pmdp) BTFIXUP_CALL(pgd_set)(pgdp,pmdp) 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) BTFIXUPDEF_CALL(int, mmu_info, char *) #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; } } #define module_map vmalloc #define module_unmap vfree 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); #endif /* !(__ASSEMBLY__) */ /* We provide our own get_unmapped_area to cope with VA holes for userland */ #define HAVE_ARCH_UNMAPPED_AREA #endif /* !(_SPARC_PGTABLE_H) */