diff options
Diffstat (limited to 'include/asm-parisc/page.h')
| -rw-r--r-- | include/asm-parisc/page.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/include/asm-parisc/page.h b/include/asm-parisc/page.h new file mode 100644 index 000000000000..4a12692f94b4 --- /dev/null +++ b/include/asm-parisc/page.h @@ -0,0 +1,162 @@ +#ifndef _PARISC_PAGE_H +#define _PARISC_PAGE_H + +/* PAGE_SHIFT determines the page size */ +#define PAGE_SHIFT 12 +#define PAGE_SIZE (1UL << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE-1)) + +#ifdef __KERNEL__ +#include <linux/config.h> +#ifndef __ASSEMBLY__ + +#include <asm/types.h> +#include <asm/cache.h> + +#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) +#define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from)) + +struct page; + +extern void purge_kernel_dcache_page(unsigned long); +extern void copy_user_page_asm(void *to, void *from); +extern void clear_user_page_asm(void *page, unsigned long vaddr); + +static inline void +copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg) +{ + copy_user_page_asm(vto, vfrom); + flush_kernel_dcache_page(vto); + /* XXX: ppc flushes icache too, should we? */ +} + +static inline void +clear_user_page(void *page, unsigned long vaddr, struct page *pg) +{ + purge_kernel_dcache_page((unsigned long)page); + clear_user_page_asm(page, vaddr); +} + +/* + * These are used to make use of C type-checking.. + */ +#ifdef __LP64__ +typedef struct { unsigned long pte; } pte_t; +#else +typedef struct { + unsigned long pte; + unsigned long flags; +} pte_t; +#endif +/* NOTE: even on 64 bits, these entries are __u32 because we allocate + * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ +typedef struct { __u32 pmd; } pmd_t; +typedef struct { __u32 pgd; } pgd_t; +typedef struct { unsigned long pgprot; } pgprot_t; + +#define pte_val(x) ((x).pte) +#ifdef __LP64__ +#define pte_flags(x) (*(__u32 *)&((x).pte)) +#else +#define pte_flags(x) ((x).flags) +#endif + +/* These do not work lvalues, so make sure we don't use them as such. */ +#define pmd_val(x) ((x).pmd + 0) +#define pgd_val(x) ((x).pgd + 0) +#define pgprot_val(x) ((x).pgprot) + +#define __pmd_val_set(x,n) (x).pmd = (n) +#define __pgd_val_set(x,n) (x).pgd = (n) + +#define __pte(x) ((pte_t) { (x) } ) +#define __pmd(x) ((pmd_t) { (x) } ) +#define __pgd(x) ((pgd_t) { (x) } ) +#define __pgprot(x) ((pgprot_t) { (x) } ) + +/* Pure 2^n version of get_order */ +extern __inline__ int get_order(unsigned long size) +{ + int order; + + size = (size-1) >> (PAGE_SHIFT-1); + order = -1; + do { + size >>= 1; + order++; + } while (size); + return order; +} + +typedef struct __physmem_range { + unsigned long start_pfn; + unsigned long pages; /* PAGE_SIZE pages */ +} physmem_range_t; + +extern physmem_range_t pmem_ranges[]; +extern int npmem_ranges; + +#endif /* !__ASSEMBLY__ */ + +/* WARNING: The definitions below must match exactly to sizeof(pte_t) + * etc + */ +#ifdef __LP64__ +#define BITS_PER_PTE_ENTRY 3 +#define BITS_PER_PMD_ENTRY 2 +#define BITS_PER_PGD_ENTRY 2 +#else +#define BITS_PER_PTE_ENTRY 3 +#define BITS_PER_PMD_ENTRY 2 +#define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY +#endif +#define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) +#define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) +#define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) + +/* to align the pointer to the (next) page boundary */ +#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) + + +#define LINUX_GATEWAY_SPACE 0 + +/* This governs the relationship between virtual and physical addresses. + * If you alter it, make sure to take care of our various fixed mapping + * segments in fixmap.h */ +#define __PAGE_OFFSET (0x10000000) + +#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) + +/* The size of the gateway page (we leave lots of room for expansion) */ +#define GATEWAY_PAGE_SIZE 0x4000 + +/* The start of the actual kernel binary---used in vmlinux.lds.S + * Leave some space after __PAGE_OFFSET for detecting kernel null + * ptr derefs */ +#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) + +/* These macros don't work for 64-bit C code -- don't allow in C at all */ +#ifdef __ASSEMBLY__ +# define PA(x) ((x)-__PAGE_OFFSET) +# define VA(x) ((x)+__PAGE_OFFSET) +#endif +#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) +#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) + +#ifndef CONFIG_DISCONTIGMEM +#define pfn_to_page(pfn) (mem_map + (pfn)) +#define page_to_pfn(page) ((unsigned long)((page) - mem_map)) +#define pfn_valid(pfn) ((pfn) < max_mapnr) +#endif /* CONFIG_DISCONTIGMEM */ + +#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) + +#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) +#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) + +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#endif /* __KERNEL__ */ + +#endif /* _PARISC_PAGE_H */ |