+++ /dev/null
-/*
- * 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 - 1999, 2000, 03 Ralf Baechle
- * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
- */
-#ifndef _ASM_PAGE_H
-#define _ASM_PAGE_H
-
-#include <spaces.h>
-
-/*
- * PAGE_SHIFT determines the page size
- */
-#ifdef CONFIG_PAGE_SIZE_4KB
-#define PAGE_SHIFT 12
-#endif
-#ifdef CONFIG_PAGE_SIZE_8KB
-#define PAGE_SHIFT 13
-#endif
-#ifdef CONFIG_PAGE_SIZE_16KB
-#define PAGE_SHIFT 14
-#endif
-#ifdef CONFIG_PAGE_SIZE_64KB
-#define PAGE_SHIFT 16
-#endif
-#define PAGE_SIZE (1UL << PAGE_SHIFT)
-#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
-
-#ifndef __ASSEMBLY__
-
-#include <linux/pfn.h>
-#include <asm/io.h>
-
-extern void build_clear_page(void);
-extern void build_copy_page(void);
-
-/*
- * It's normally defined only for FLATMEM config but it's
- * used in our early mem init code for all memory models.
- * So always define it.
- */
-#define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
-
-extern void clear_page(void * page);
-extern void copy_page(void * to, void * from);
-
-extern unsigned long shm_align_mask;
-
-static inline unsigned long pages_do_alias(unsigned long addr1,
- unsigned long addr2)
-{
- return (addr1 ^ addr2) & shm_align_mask;
-}
-
-struct page;
-
-static inline void clear_user_page(void *addr, unsigned long vaddr,
- struct page *page)
-{
- extern void (*flush_data_cache_page)(unsigned long addr);
-
- clear_page(addr);
- if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
- flush_data_cache_page((unsigned long)addr);
-}
-
-extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
- struct page *to);
-struct vm_area_struct;
-extern void copy_user_highpage(struct page *to, struct page *from,
- unsigned long vaddr, struct vm_area_struct *vma);
-
-#define __HAVE_ARCH_COPY_USER_HIGHPAGE
-
-/*
- * These are used to make use of C type-checking..
- */
-#ifdef CONFIG_64BIT_PHYS_ADDR
- #ifdef CONFIG_CPU_MIPS32
- typedef struct { unsigned long pte_low, pte_high; } pte_t;
- #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
- #define __pte(x) ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
- #else
- typedef struct { unsigned long long pte; } pte_t;
- #define pte_val(x) ((x).pte)
- #define __pte(x) ((pte_t) { (x) } )
- #endif
-#else
-typedef struct { unsigned long pte; } pte_t;
-#define pte_val(x) ((x).pte)
-#define __pte(x) ((pte_t) { (x) } )
-#endif
-typedef struct page *pgtable_t;
-
-/*
- * For 3-level pagetables we defines these ourselves, for 2-level the
- * definitions are supplied by <asm-generic/pgtable-nopmd.h>.
- */
-#ifdef CONFIG_64BIT
-
-typedef struct { unsigned long pmd; } pmd_t;
-#define pmd_val(x) ((x).pmd)
-#define __pmd(x) ((pmd_t) { (x) } )
-
-#endif
-
-/*
- * Right now we don't support 4-level pagetables, so all pud-related
- * definitions come from <asm-generic/pgtable-nopud.h>.
- */
-
-/*
- * Finall the top of the hierarchy, the pgd
- */
-typedef struct { unsigned long pgd; } pgd_t;
-#define pgd_val(x) ((x).pgd)
-#define __pgd(x) ((pgd_t) { (x) } )
-
-/*
- * Manipulate page protection bits
- */
-typedef struct { unsigned long pgprot; } pgprot_t;
-#define pgprot_val(x) ((x).pgprot)
-#define __pgprot(x) ((pgprot_t) { (x) } )
-
-/*
- * On R4000-style MMUs where a TLB entry is mapping a adjacent even / odd
- * pair of pages we only have a single global bit per pair of pages. When
- * writing to the TLB make sure we always have the bit set for both pages
- * or none. This macro is used to access the `buddy' of the pte we're just
- * working on.
- */
-#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
-
-#endif /* !__ASSEMBLY__ */
-
-/*
- * __pa()/__va() should be used only during mem init.
- */
-#ifdef CONFIG_64BIT
-#define __pa(x) \
-({ \
- unsigned long __x = (unsigned long)(x); \
- __x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x); \
-})
-#else
-#define __pa(x) \
- ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
-#endif
-#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
-#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0))
-
-#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
-
-#ifdef CONFIG_FLATMEM
-
-#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && (pfn) < max_mapnr)
-
-#elif defined(CONFIG_SPARSEMEM)
-
-/* pfn_valid is defined in linux/mmzone.h */
-
-#elif defined(CONFIG_NEED_MULTIPLE_NODES)
-
-#define pfn_valid(pfn) \
-({ \
- unsigned long __pfn = (pfn); \
- int __n = pfn_to_nid(__pfn); \
- ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \
- NODE_DATA(__n)->node_spanned_pages) \
- : 0); \
-})
-
-#endif
-
-#define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(virt_to_phys(kaddr)))
-#define virt_addr_valid(kaddr) pfn_valid(PFN_DOWN(virt_to_phys(kaddr)))
-
-#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
- VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE)
-#define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET)
-
-#include <asm-generic/memory_model.h>
-#include <asm-generic/page.h>
-
-#endif /* _ASM_PAGE_H */
projects / karo-tx-linux.git / blobdiff