diff options
Diffstat (limited to 'include/asm-x86_64/page.h')
| -rw-r--r-- | include/asm-x86_64/page.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/include/asm-x86_64/page.h b/include/asm-x86_64/page.h new file mode 100644 index 00000000000..f43048035a0 --- /dev/null +++ b/include/asm-x86_64/page.h @@ -0,0 +1,139 @@ +#ifndef _X86_64_PAGE_H +#define _X86_64_PAGE_H + +#include <linux/config.h> + +/* PAGE_SHIFT determines the page size */ +#define PAGE_SHIFT 12 +#ifdef __ASSEMBLY__ +#define PAGE_SIZE (0x1 << PAGE_SHIFT) +#else +#define PAGE_SIZE (1UL << PAGE_SHIFT) +#endif +#define PAGE_MASK (~(PAGE_SIZE-1)) +#define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & (__PHYSICAL_MASK << PAGE_SHIFT)) + +#define THREAD_ORDER 1 +#ifdef __ASSEMBLY__ +#define THREAD_SIZE (1 << (PAGE_SHIFT + THREAD_ORDER)) +#else +#define THREAD_SIZE (1UL << (PAGE_SHIFT + THREAD_ORDER)) +#endif +#define CURRENT_MASK (~(THREAD_SIZE-1)) + +#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1)) +#define LARGE_PAGE_SIZE (1UL << PMD_SHIFT) + +#define HPAGE_SHIFT PMD_SHIFT +#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) +#define HPAGE_MASK (~(HPAGE_SIZE - 1)) +#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) + +#ifdef __KERNEL__ +#ifndef __ASSEMBLY__ + +void clear_page(void *); +void copy_page(void *, void *); + +#define clear_user_page(page, vaddr, pg) clear_page(page) +#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) + +#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) +#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE +/* + * These are used to make use of C type-checking.. + */ +typedef struct { unsigned long pte; } pte_t; +typedef struct { unsigned long pmd; } pmd_t; +typedef struct { unsigned long pud; } pud_t; +typedef struct { unsigned long pgd; } pgd_t; +#define PTE_MASK PHYSICAL_PAGE_MASK + +typedef struct { unsigned long pgprot; } pgprot_t; + +#define pte_val(x) ((x).pte) +#define pmd_val(x) ((x).pmd) +#define pud_val(x) ((x).pud) +#define pgd_val(x) ((x).pgd) +#define pgprot_val(x) ((x).pgprot) + +#define __pte(x) ((pte_t) { (x) } ) +#define __pmd(x) ((pmd_t) { (x) } ) +#define __pud(x) ((pud_t) { (x) } ) +#define __pgd(x) ((pgd_t) { (x) } ) +#define __pgprot(x) ((pgprot_t) { (x) } ) + +#define __START_KERNEL 0xffffffff80100000UL +#define __START_KERNEL_map 0xffffffff80000000UL +#define __PAGE_OFFSET 0xffff810000000000UL + +#else +#define __START_KERNEL 0xffffffff80100000 +#define __START_KERNEL_map 0xffffffff80000000 +#define __PAGE_OFFSET 0xffff810000000000 +#endif /* !__ASSEMBLY__ */ + +/* to align the pointer to the (next) page boundary */ +#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) + +/* See Documentation/x86_64/mm.txt for a description of the memory map. */ +#define __PHYSICAL_MASK_SHIFT 46 +#define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1) +#define __VIRTUAL_MASK_SHIFT 48 +#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) + +#define KERNEL_TEXT_SIZE (40UL*1024*1024) +#define KERNEL_TEXT_START 0xffffffff80000000UL + +#ifndef __ASSEMBLY__ + +#include <asm/bug.h> + +/* 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; +} + +#endif /* __ASSEMBLY__ */ + +#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) + +/* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol. + Otherwise you risk miscompilation. */ +#define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET) +/* __pa_symbol should be used for C visible symbols. + This seems to be the official gcc blessed way to do such arithmetic. */ +#define __pa_symbol(x) \ + ({unsigned long v; \ + asm("" : "=r" (v) : "0" (x)); \ + __pa(v); }) + +#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 + +#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) +#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) +#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) + +#define VM_DATA_DEFAULT_FLAGS \ + (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ + VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#define __HAVE_ARCH_GATE_AREA 1 + +#endif /* __KERNEL__ */ + +#endif /* _X86_64_PAGE_H */ |