From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-mips/pgtable-32.h | 243 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 243 insertions(+) create mode 100644 include/asm-mips/pgtable-32.h (limited to 'include/asm-mips/pgtable-32.h') diff --git a/include/asm-mips/pgtable-32.h b/include/asm-mips/pgtable-32.h new file mode 100644 index 000000000000..41a0df7d7768 --- /dev/null +++ b/include/asm-mips/pgtable-32.h @@ -0,0 +1,243 @@ +/* + * 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_32_H +#define _ASM_PGTABLE_32_H + +#include +#include +#include + +#include +#include +#include + +/* + * - add_wired_entry() add a fixed TLB entry, and move wired register + */ +extern void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1, + unsigned long entryhi, unsigned long pagemask); + +/* + * - add_temporary_entry() add a temporary TLB entry. We use TLB entries + * starting at the top and working down. This is for populating the + * TLB before trap_init() puts the TLB miss handler in place. It + * should be used only for entries matching the actual page tables, + * to prevent inconsistencies. + */ +extern int add_temporary_entry(unsigned long entrylo0, unsigned long entrylo1, + unsigned long entryhi, unsigned long pagemask); + + +/* Basically we have the same two-level (which is the logical three level + * Linux page table layout folded) page tables as the i386. Some day + * when we have proper page coloring support we can have a 1% quicker + * tlb refill handling mechanism, but for now it is a bit slower but + * works even with the cache aliasing problem the R4k and above have. + */ + +/* PMD_SHIFT determines the size of the area a second-level page table can map */ +#ifdef CONFIG_64BIT_PHYS_ADDR +#define PMD_SHIFT 21 +#else +#define PMD_SHIFT 22 +#endif +#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 +#define PGDIR_SIZE (1UL << PGDIR_SHIFT) +#define PGDIR_MASK (~(PGDIR_SIZE-1)) + +/* + * Entries per page directory level: we use two-level, so + * we don't really have any PMD directory physically. + */ +#ifdef CONFIG_64BIT_PHYS_ADDR +#define PGD_ORDER 1 +#define PMD_ORDER 0 +#define PTE_ORDER 0 +#else +#define PGD_ORDER 0 +#define PMD_ORDER 0 +#define PTE_ORDER 0 +#endif + +#define PTRS_PER_PGD ((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t)) +#define PTRS_PER_PMD 1 +#define PTRS_PER_PTE ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t)) + +#define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE) +#define FIRST_USER_PGD_NR 0 + +#define VMALLOC_START KSEG2 + +#ifdef CONFIG_HIGHMEM +# define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE) +#else +# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE) +#endif + +#ifdef CONFIG_64BIT_PHYS_ADDR +#define pte_ERROR(e) \ + printk("%s:%d: bad pte %016Lx.\n", __FILE__, __LINE__, pte_val(e)) +#else +#define pte_ERROR(e) \ + printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) +#endif +#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)) + +extern void load_pgd(unsigned long pg_dir); + +extern pte_t invalid_pte_table[PAGE_SIZE/sizeof(pte_t)]; + +/* + * 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); +} + +/* + * 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) + */ +static inline int pgd_none(pgd_t pgd) { return 0; } +static inline int pgd_bad(pgd_t pgd) { return 0; } +static inline int pgd_present(pgd_t pgd) { return 1; } +static inline void pgd_clear(pgd_t *pgdp) { } + +#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32) +#define pte_page(x) pfn_to_page(pte_pfn(x)) +#define pte_pfn(x) ((unsigned long)((x).pte_high >> 6)) +static inline pte_t +pfn_pte(unsigned long pfn, pgprot_t prot) +{ + pte_t pte; + pte.pte_high = (pfn << 6) | (pgprot_val(prot) & 0x3f); + pte.pte_low = pgprot_val(prot); + return pte; +} + +#else + +#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 +#endif /* defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32) */ + +#define __pgd_offset(address) pgd_index(address) +#define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) + +/* to find an entry in a kernel page-table-directory */ +#define pgd_offset_k(address) pgd_offset(&init_mm, address) + +#define pgd_index(address) ((address) >> PGDIR_SHIFT) + +/* to find an entry in a page-table-directory */ +#define pgd_offset(mm,addr) ((mm)->pgd + pgd_index(addr)) + +/* Find an entry in the second-level page table.. */ +static inline pmd_t *pmd_offset(pgd_t *dir, unsigned long address) +{ + return (pmd_t *) dir; +} + +/* 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_kernel(*dir)) + __pte_offset(address)) +#define pte_offset_kernel(dir, address) \ + ((pte_t *) pmd_page_kernel(*(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)) + +#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX) + +/* Swap entries must have VALID bit cleared. */ +#define __swp_type(x) (((x).val >> 10) & 0x1f) +#define __swp_offset(x) ((x).val >> 15) +#define __swp_entry(type,offset) \ + ((swp_entry_t) { ((type) << 10) | ((offset) << 15) }) + +/* + * Bits 0, 1, 2, 9 and 10 are taken, split up the 27 bits of offset + * into this range: + */ +#define PTE_FILE_MAX_BITS 27 + +#define pte_to_pgoff(_pte) \ + ((((_pte).pte >> 3) & 0x3f ) + (((_pte).pte >> 11) << 8 )) + +#define pgoff_to_pte(off) \ + ((pte_t) { (((off) & 0x3f) << 3) + (((off) >> 8) << 11) + _PAGE_FILE }) + +#else + +/* Swap entries must have VALID and GLOBAL bits cleared. */ +#define __swp_type(x) (((x).val >> 8) & 0x1f) +#define __swp_offset(x) ((x).val >> 13) +#define __swp_entry(type,offset) \ + ((swp_entry_t) { ((type) << 8) | ((offset) << 13) }) + +/* + * Bits 0, 1, 2, 7 and 8 are taken, split up the 27 bits of offset + * into this range: + */ +#define PTE_FILE_MAX_BITS 27 + +#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32) + /* fixme */ +#define pte_to_pgoff(_pte) (((_pte).pte_high >> 6) + ((_pte).pte_high & 0x3f)) +#define pgoff_to_pte(off) \ + ((pte_t){(((off) & 0x3f) + ((off) << 6) + _PAGE_FILE)}) + +#else +#define pte_to_pgoff(_pte) \ + ((((_pte).pte >> 3) & 0x1f ) + (((_pte).pte >> 9) << 6 )) + +#define pgoff_to_pte(off) \ + ((pte_t) { (((off) & 0x1f) << 3) + (((off) >> 6) << 9) + _PAGE_FILE }) +#endif + +#endif + +#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) +#define __swp_entry_to_pte(x) ((pte_t) { (x).val }) + +#endif /* _ASM_PGTABLE_32_H */ -- cgit v1.2.3