diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2008-09-16 19:48:51 +0200 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2008-10-11 16:18:52 +0100 |
commit | 384740dc49ea651ba350704d13ff6be9976e37fe (patch) | |
tree | a6e80cad287ccae7a86d81bfa692fc96889c88ed /include/asm-mips/pgtable-64.h | |
parent | e8c7c482347574ecdd45c43e32c332d5fc2ece61 (diff) |
MIPS: Move headfiles to new location below arch/mips/include
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/pgtable-64.h')
-rw-r--r-- | include/asm-mips/pgtable-64.h | 253 |
1 files changed, 0 insertions, 253 deletions
diff --git a/include/asm-mips/pgtable-64.h b/include/asm-mips/pgtable-64.h deleted file mode 100644 index 943515f0ef8..00000000000 --- a/include/asm-mips/pgtable-64.h +++ /dev/null @@ -1,253 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 2003 Ralf Baechle - * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. - */ -#ifndef _ASM_PGTABLE_64_H -#define _ASM_PGTABLE_64_H - -#include <linux/linkage.h> - -#include <asm/addrspace.h> -#include <asm/page.h> -#include <asm/cachectl.h> -#include <asm/fixmap.h> - -#include <asm-generic/pgtable-nopud.h> - -/* - * Each address space has 2 4K pages as its page directory, giving 1024 - * (== PTRS_PER_PGD) 8 byte pointers to pmd tables. Each pmd table is a - * single 4K page, giving 512 (== PTRS_PER_PMD) 8 byte pointers to page - * tables. Each page table is also a single 4K page, giving 512 (== - * PTRS_PER_PTE) 8 byte ptes. Each pud entry is initialized to point to - * invalid_pmd_table, each pmd entry is initialized to point to - * invalid_pte_table, each pte is initialized to 0. When memory is low, - * and a pmd table or a page table allocation fails, empty_bad_pmd_table - * and empty_bad_page_table is returned back to higher layer code, so - * that the failure is recognized later on. Linux does not seem to - * handle these failures very well though. The empty_bad_page_table has - * invalid pte entries in it, to force page faults. - * - * Kernel mappings: kernel mappings are held in the swapper_pg_table. - * The layout is identical to userspace except it's indexed with the - * fault address - VMALLOC_START. - */ - -/* PMD_SHIFT determines the size of the area a second-level page table can map */ -#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT + PTE_ORDER - 3)) -#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 (PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3)) -#define PGDIR_SIZE (1UL << PGDIR_SHIFT) -#define PGDIR_MASK (~(PGDIR_SIZE-1)) - -/* - * For 4kB page size we use a 3 level page tree and an 8kB pud, which - * permits us mapping 40 bits of virtual address space. - * - * We used to implement 41 bits by having an order 1 pmd level but that seemed - * rather pointless. - * - * For 8kB page size we use a 3 level page tree which permits a total of - * 8TB of address space. Alternatively a 33-bit / 8GB organization using - * two levels would be easy to implement. - * - * For 16kB page size we use a 2 level page tree which permits a total of - * 36 bits of virtual address space. We could add a third level but it seems - * like at the moment there's no need for this. - * - * For 64kB page size we use a 2 level page table tree for a total of 42 bits - * of virtual address space. - */ -#ifdef CONFIG_PAGE_SIZE_4KB -#define PGD_ORDER 1 -#define PUD_ORDER aieeee_attempt_to_allocate_pud -#define PMD_ORDER 0 -#define PTE_ORDER 0 -#endif -#ifdef CONFIG_PAGE_SIZE_8KB -#define PGD_ORDER 0 -#define PUD_ORDER aieeee_attempt_to_allocate_pud -#define PMD_ORDER 0 -#define PTE_ORDER 0 -#endif -#ifdef CONFIG_PAGE_SIZE_16KB -#define PGD_ORDER 0 -#define PUD_ORDER aieeee_attempt_to_allocate_pud -#define PMD_ORDER 0 -#define PTE_ORDER 0 -#endif -#ifdef CONFIG_PAGE_SIZE_64KB -#define PGD_ORDER 0 -#define PUD_ORDER aieeee_attempt_to_allocate_pud -#define PMD_ORDER 0 -#define PTE_ORDER 0 -#endif - -#define PTRS_PER_PGD ((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t)) -#define PTRS_PER_PMD ((PAGE_SIZE << PMD_ORDER) / sizeof(pmd_t)) -#define PTRS_PER_PTE ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t)) - -#if PGDIR_SIZE >= TASK_SIZE -#define USER_PTRS_PER_PGD (1) -#else -#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE) -#endif -#define FIRST_USER_ADDRESS 0UL - -#define VMALLOC_START MAP_BASE -#define VMALLOC_END \ - (VMALLOC_START + PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE) -#if defined(CONFIG_MODULES) && defined(KBUILD_64BIT_SYM32) && \ - VMALLOC_START != CKSSEG -/* Load modules into 32bit-compatible segment. */ -#define MODULE_START CKSSEG -#define MODULE_END (FIXADDR_START-2*PAGE_SIZE) -extern pgd_t module_pg_dir[PTRS_PER_PGD]; -#endif - -#define pte_ERROR(e) \ - printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e)) -#define pmd_ERROR(e) \ - printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e)) -#define pgd_ERROR(e) \ - printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e)) - -extern pte_t invalid_pte_table[PTRS_PER_PTE]; -extern pte_t empty_bad_page_table[PTRS_PER_PTE]; -extern pmd_t invalid_pmd_table[PTRS_PER_PMD]; -extern pmd_t empty_bad_pmd_table[PTRS_PER_PMD]; - -/* - * Empty pgd/pmd entries point to the invalid_pte_table. - */ -static inline int pmd_none(pmd_t pmd) -{ - return pmd_val(pmd) == (unsigned long) invalid_pte_table; -} - -#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK) - -static inline int pmd_present(pmd_t pmd) -{ - return pmd_val(pmd) != (unsigned long) invalid_pte_table; -} - -static inline void pmd_clear(pmd_t *pmdp) -{ - pmd_val(*pmdp) = ((unsigned long) invalid_pte_table); -} - -/* - * Empty pud entries point to the invalid_pmd_table. - */ -static inline int pud_none(pud_t pud) -{ - return pud_val(pud) == (unsigned long) invalid_pmd_table; -} - -static inline int pud_bad(pud_t pud) -{ - return pud_val(pud) & ~PAGE_MASK; -} - -static inline int pud_present(pud_t pud) -{ - return pud_val(pud) != (unsigned long) invalid_pmd_table; -} - -static inline void pud_clear(pud_t *pudp) -{ - pud_val(*pudp) = ((unsigned long) invalid_pmd_table); -} - -#define pte_page(x) pfn_to_page(pte_pfn(x)) - -#ifdef CONFIG_CPU_VR41XX -#define pte_pfn(x) ((unsigned long)((x).pte >> (PAGE_SHIFT + 2))) -#define pfn_pte(pfn, prot) __pte(((pfn) << (PAGE_SHIFT + 2)) | pgprot_val(prot)) -#else -#define pte_pfn(x) ((unsigned long)((x).pte >> PAGE_SHIFT)) -#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) -#endif - -#define __pgd_offset(address) pgd_index(address) -#define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) -#define __pmd_offset(address) pmd_index(address) - -/* to find an entry in a kernel page-table-directory */ -#ifdef MODULE_START -#define pgd_offset_k(address) \ - ((address) >= MODULE_START ? module_pg_dir : pgd_offset(&init_mm, 0UL)) -#else -#define pgd_offset_k(address) pgd_offset(&init_mm, 0UL) -#endif - -#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) -#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) - -/* to find an entry in a page-table-directory */ -#define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr)) - -static inline unsigned long pud_page_vaddr(pud_t pud) -{ - return pud_val(pud); -} -#define pud_phys(pud) virt_to_phys((void *)pud_val(pud)) -#define pud_page(pud) (pfn_to_page(pud_phys(pud) >> PAGE_SHIFT)) - -/* Find an entry in the second-level page table.. */ -static inline pmd_t *pmd_offset(pud_t * pud, unsigned long address) -{ - return (pmd_t *) pud_page_vaddr(*pud) + pmd_index(address); -} - -/* Find an entry in the third-level page table.. */ -#define __pte_offset(address) \ - (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) -#define pte_offset(dir, address) \ - ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address)) -#define pte_offset_kernel(dir, address) \ - ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address)) -#define pte_offset_map(dir, address) \ - ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address)) -#define pte_offset_map_nested(dir, address) \ - ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address)) -#define pte_unmap(pte) ((void)(pte)) -#define pte_unmap_nested(pte) ((void)(pte)) - -/* - * Initialize a new pgd / pmd table with invalid pointers. - */ -extern void pgd_init(unsigned long page); -extern void pmd_init(unsigned long page, unsigned long pagetable); - -/* - * Non-present pages: high 24 bits are offset, next 8 bits type, - * low 32 bits zero. - */ -static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset) -{ pte_t pte; pte_val(pte) = (type << 32) | (offset << 40); return pte; } - -#define __swp_type(x) (((x).val >> 32) & 0xff) -#define __swp_offset(x) ((x).val >> 40) -#define __swp_entry(type, offset) ((swp_entry_t) { pte_val(mk_swap_pte((type), (offset))) }) -#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) -#define __swp_entry_to_pte(x) ((pte_t) { (x).val }) - -/* - * Bits 0, 4, 6, and 7 are taken. Let's leave bits 1, 2, 3, and 5 alone to - * make things easier, and only use the upper 56 bits for the page offset... - */ -#define PTE_FILE_MAX_BITS 56 - -#define pte_to_pgoff(_pte) ((_pte).pte >> 8) -#define pgoff_to_pte(off) ((pte_t) { ((off) << 8) | _PAGE_FILE }) - -#endif /* _ASM_PGTABLE_64_H */ |