diff options
Diffstat (limited to 'include/asm-arm/proc-armo/pgtable-flat.h')
| -rw-r--r-- | include/asm-arm/proc-armo/pgtable-flat.h | 307 |
1 files changed, 0 insertions, 307 deletions
diff --git a/include/asm-arm/proc-armo/pgtable-flat.h b/include/asm-arm/proc-armo/pgtable-flat.h deleted file mode 100644 index 994fa9f21..000000000 --- a/include/asm-arm/proc-armo/pgtable-flat.h +++ /dev/null @@ -1,307 +0,0 @@ -/* - * linux/include/asm-arm/proc-armo/pgtable.h - * - * Copyright (C) 1995, 1996 Russell King - */ -#ifndef __ASM_PROC_PGTABLE_H -#define __ASM_PROC_PGTABLE_H - -#include <asm/arch/mmu.h> - -#define LIBRARY_TEXT_START 0x0c000000 - -/* - * Cache flushing... - */ -#define flush_cache_all() do { } while (0) -#define flush_cache_mm(mm) do { } while (0) -#define flush_cache_range(mm,start,end) do { } while (0) -#define flush_cache_page(vma,vmaddr) do { } while (0) -#define flush_page_to_ram(page) do { } while (0) - -/* - * TLB flushing: - * - * - flush_tlb() flushes the current mm struct TLBs - * - flush_tlb_all() flushes all processes TLBs - * - flush_tlb_mm(mm) flushes the specified mm context TLB's - * - flush_tlb_page(vma, vmaddr) flushes one page - * - flush_tlb_range(mm, start, end) flushes a range of pages - */ - -#define flush_tlb() flush_tlb_mm(current->mm) - -extern __inline__ void flush_tlb_all(void) -{ - struct task_struct *p; - - p = &init_task; - do { - processor.u.armv2._update_map(p); - p = p->next_task; - } while (p != &init_task); - - processor.u.armv2._remap_memc (current); -} - -extern __inline__ void flush_tlb_mm(struct mm_struct *mm) -{ - struct task_struct *p; - - p = &init_task; - do { - if (p->mm == mm) - processor.u.armv2._update_map(p); - p = p->next_task; - } while (p != &init_task); - - if (current->mm == mm) - processor.u.armv2._remap_memc (current); -} - -#define flush_tlb_range(mm, start, end) flush_tlb_mm(mm) -#define flush_tlb_page(vma, vmaddr) flush_tlb_mm(vma->vm_mm) - -#define __flush_entry_to_ram(entry) - -/* Certain architectures need to do special things when pte's - * within a page table are directly modified. Thus, the following - * hook is made available. - */ -#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval)) - -/* PMD_SHIFT determines the size of the area a second-level page table can map */ -#define PMD_SHIFT PAGE_SHIFT -#define PMD_SIZE (1UL << PMD_SHIFT) -#define PMD_MASK (~(PMD_SIZE-1)) - -/* PGDIR_SHIFT determines what a third-level page table entry can map */ -#define PGDIR_SHIFT PAGE_SHIFT -#define PGDIR_SIZE (1UL << PGDIR_SHIFT) -#define PGDIR_MASK (~(PGDIR_SIZE-1)) - -/* - * entries per page directory level: the arm3 is one-level, so - * we don't really have any PMD or PTE directory physically. - */ -#define PTRS_PER_PTE 1 -#define PTRS_PER_PMD 1 -#define PTRS_PER_PGD 1024 - -/* Just any arbitrary offset to the start of the vmalloc VM area: the - * current 8MB value just means that there will be a 8MB "hole" after the - * physical memory until the kernel virtual memory starts. That means that - * any out-of-bounds memory accesses will hopefully be caught. - * The vmalloc() routines leaves a hole of 4kB between each vmalloced - * area for the same reason. ;) - */ -#define VMALLOC_START 0x01a00000 -#define VMALLOC_VMADDR(x) ((unsigned long)(x)) - -#define _PAGE_PRESENT 0x001 -#define _PAGE_RW 0x002 -#define _PAGE_USER 0x004 -#define _PAGE_PCD 0x010 -#define _PAGE_ACCESSED 0x020 -#define _PAGE_DIRTY 0x040 - -#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY) -#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY) - -#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED) -#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED) -#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) -#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) -#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) - -/* - * The arm can't do page protection for execute, and considers that the same are read. - * Also, write permissions imply read permissions. This is the closest we can get.. - */ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY -#define __P101 PAGE_READONLY -#define __P110 PAGE_COPY -#define __P111 PAGE_COPY - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY -#define __S101 PAGE_READONLY -#define __S110 PAGE_SHARED -#define __S111 PAGE_SHARED - -#undef TEST_VERIFY_AREA - -/* - * 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_page(void); -extern unsigned long *empty_zero_page; - -#define BAD_PAGE __bad_page() -#define ZERO_PAGE ((unsigned long) empty_zero_page) - -/* number of bits that fit into a memory pointer */ -#define BYTES_PER_PTR (sizeof(unsigned long)) -#define BITS_PER_PTR (8*BYTES_PER_PTR) - -/* to align the pointer to a pointer address */ -#define PTR_MASK (~(sizeof(void*)-1)) - -/* sizeof(void*)==1<<SIZEOF_PTR_LOG2 */ -#define SIZEOF_PTR_LOG2 2 - -/* to find an entry in a page-table */ -#define PAGE_PTR(address) \ -((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK) - -/* to set the page-dir */ -#define SET_PAGE_DIR(tsk,pgdir) \ -do { \ - tsk->tss.memmap = (unsigned long)pgdir; \ - processor.u.armv2._update_map(tsk); \ - if ((tsk) == current) \ - processor.u.armv2._remap_memc (current); \ -} while (0) - -extern unsigned long physical_start; -extern unsigned long physical_end; - -extern inline int pte_none(pte_t pte) { return !pte_val(pte); } -extern inline int pte_present(pte_t pte) { return pte_val(pte) & _PAGE_PRESENT; } -extern inline void pte_clear(pte_t *ptep) { pte_val(*ptep) = 0; } - -extern inline int pmd_none(pmd_t pmd) { return 0; } -extern inline int pmd_bad(pmd_t pmd) { return 0; } -extern inline int pmd_present(pmd_t pmd) { return 1; } -extern inline void pmd_clear(pmd_t * pmdp) { } - -/* - * The "pgd_xxx()" functions here are trivial for a folded two-level - * setup: the pgd is never bad, and a pmd always exists (as it's folded - * into the pgd entry) - */ -extern inline int pgd_none(pgd_t pgd) { return 0; } -extern inline int pgd_bad(pgd_t pgd) { return 0; } -extern inline int pgd_present(pgd_t pgd) { return 1; } -extern inline void pgd_clear(pgd_t * pgdp) { } - -/* - * The following only work if pte_present() is true. - * Undefined behaviour if not.. - */ -extern inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_USER; } -extern inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } -extern inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_USER; } -extern inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } -extern inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } -#define pte_cacheable(pte) 1 - -extern inline pte_t pte_nocache(pte_t pte) { return pte; } -extern inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~_PAGE_RW; return pte; } -extern inline pte_t pte_rdprotect(pte_t pte) { pte_val(pte) &= ~_PAGE_USER; return pte; } -extern inline pte_t pte_exprotect(pte_t pte) { pte_val(pte) &= ~_PAGE_USER; return pte; } -extern inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~_PAGE_DIRTY; return pte; } -extern inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; } -extern inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= _PAGE_RW; return pte; } -extern inline pte_t pte_mkread(pte_t pte) { pte_val(pte) |= _PAGE_USER; return pte; } -extern inline pte_t pte_mkexec(pte_t pte) { pte_val(pte) |= _PAGE_USER; return pte; } -extern inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; } -extern inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= _PAGE_ACCESSED; return 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. - */ -extern inline pte_t mk_pte(unsigned long page, pgprot_t pgprot) -{ pte_t pte; pte_val(pte) = virt_to_phys(page) | pgprot_val(pgprot); return pte; } - -extern inline pte_t pte_modify(pte_t pte, pgprot_t newprot) -{ pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); return pte; } - -extern inline unsigned long pte_page(pte_t pte) -{ return phys_to_virt(pte_val(pte) & PAGE_MASK); } - -extern inline unsigned long pmd_page(pmd_t pmd) -{ return phys_to_virt(pmd_val(pmd) & PAGE_MASK); } - -/* to find an entry in a page-table-directory */ -extern inline pgd_t * pgd_offset(struct mm_struct * mm, unsigned long address) -{ - return mm->pgd + (address >> PGDIR_SHIFT); -} - -/* Find an entry in the second-level page table.. */ -#define pmd_offset(dir, address) ((pmd_t *)(dir)) - -/* Find an entry in the third-level page table.. */ -#define pte_offset(dir, address) ((pte_t *)(dir)) - -/* - * Allocate and free page tables. The xxx_kernel() versions are - * used to allocate a kernel page table - this turns on ASN bits - * if any. - */ -extern inline void pte_free_kernel(pte_t * pte) -{ - pte_val(*pte) = 0; -} - -extern inline pte_t * pte_alloc_kernel(pmd_t *pmd, unsigned long address) -{ - return (pte_t *) pmd; -} - -/* - * allocating and freeing a pmd is trivial: the 1-entry pmd is - * inside the pgd, so has no extra memory associated with it. - */ -#define pmd_free_kernel(pmdp) -#define pmd_alloc_kernel(pgd,address) ((pmd_t *)(pgd)) - -#define pte_free(ptep) -#define pte_alloc(pmd,address) ((pte_t *)(pmd)) - -/* - * allocating and freeing a pmd is trivial: the 1-entry pmd is - * inside the pgd, so has no extra memory associated with it. - */ -#define pmd_free(pmd) -#define pmd_alloc(pgd,address) ((pmd_t *)(pgd)) - -extern inline void pgd_free(pgd_t * pgd) -{ - extern void kfree(void *); - kfree((void *)pgd); -} - -extern inline pgd_t * pgd_alloc(void) -{ - pgd_t *pgd; - extern void *kmalloc(unsigned int, int); - - pgd = (pgd_t *) kmalloc(PTRS_PER_PGD * BYTES_PER_PTR, GFP_KERNEL); - if (pgd) - memset(pgd, 0, PTRS_PER_PGD * BYTES_PER_PTR); - return pgd; -} - -extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; - -#define update_mmu_cache(vma,address,pte) processor.u.armv2._update_mmu_cache(vma,address,pte) - -#define SWP_TYPE(entry) (((entry) >> 1) & 0x7f) -#define SWP_OFFSET(entry) ((entry) >> 8) -#define SWP_ENTRY(type,offset) (((type) << 1) | ((offset) << 8)) - -#endif /* __ASM_PROC_PAGE_H */ - |