diff options
Diffstat (limited to 'include/asm-x86_64/page.h')
| -rw-r--r-- | include/asm-x86_64/page.h | 59 |
1 files changed, 29 insertions, 30 deletions
diff --git a/include/asm-x86_64/page.h b/include/asm-x86_64/page.h index 10f346165cab..e327c830da0c 100644 --- a/include/asm-x86_64/page.h +++ b/include/asm-x86_64/page.h @@ -1,14 +1,11 @@ #ifndef _X86_64_PAGE_H #define _X86_64_PAGE_H +#include <linux/const.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_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & __PHYSICAL_MASK) @@ -33,10 +30,10 @@ #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */ #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1)) -#define LARGE_PAGE_SIZE (1UL << PMD_SHIFT) +#define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT) #define HPAGE_SHIFT PMD_SHIFT -#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) +#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) @@ -64,6 +61,8 @@ typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; +extern unsigned long phys_base; + #define pte_val(x) ((x).pte) #define pmd_val(x) ((x).pmd) #define pud_val(x) ((x).pud) @@ -76,47 +75,47 @@ typedef struct { unsigned long pgprot; } pgprot_t; #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) -#define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START) -#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) -#define __START_KERNEL_map 0xffffffff80000000UL -#define __PAGE_OFFSET 0xffff810000000000UL +#endif /* !__ASSEMBLY__ */ -#else #define __PHYSICAL_START CONFIG_PHYSICAL_START +#define __KERNEL_ALIGN 0x200000 + +/* + * Make sure kernel is aligned to 2MB address. Catching it at compile + * time is better. Change your config file and compile the kernel + * for a 2MB aligned address (CONFIG_PHYSICAL_START) + */ +#if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0 +#error "CONFIG_PHYSICAL_START must be a multiple of 2MB" +#endif + #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) -#define __START_KERNEL_map 0xffffffff80000000 -#define __PAGE_OFFSET 0xffff810000000000 -#endif /* !__ASSEMBLY__ */ +#define __START_KERNEL_map _AC(0xffffffff80000000, UL) +#define __PAGE_OFFSET _AC(0xffff810000000000, UL) /* 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 __PHYSICAL_MASK ((_AC(1,UL) << __PHYSICAL_MASK_SHIFT) - 1) #define __VIRTUAL_MASK_SHIFT 48 -#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) +#define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1) -#define KERNEL_TEXT_SIZE (40UL*1024*1024) -#define KERNEL_TEXT_START 0xffffffff80000000UL +#define KERNEL_TEXT_SIZE (40*1024*1024) +#define KERNEL_TEXT_START _AC(0xffffffff80000000, UL) +#define PAGE_OFFSET __PAGE_OFFSET #ifndef __ASSEMBLY__ #include <asm/bug.h> +extern unsigned long __phys_addr(unsigned long); + #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 __pa(x) __phys_addr((unsigned long)(x)) +#define __pa_symbol(x) __phys_addr((unsigned long)(x)) #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) #define __boot_va(x) __va(x) |