diff options
Diffstat (limited to 'arch/arm/include/asm/pgtable.h')
| -rw-r--r-- | arch/arm/include/asm/pgtable.h | 88 |
1 files changed, 54 insertions, 34 deletions
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h index 8e21ef15bd74..110295c5461d 100644 --- a/arch/arm/include/asm/pgtable.h +++ b/arch/arm/include/asm/pgtable.h @@ -164,14 +164,30 @@ extern void __pgd_error(const char *file, int line, unsigned long val); #define L_PTE_PRESENT (1 << 0) #define L_PTE_FILE (1 << 1) /* only when !PRESENT */ #define L_PTE_YOUNG (1 << 1) -#define L_PTE_BUFFERABLE (1 << 2) /* matches PTE */ -#define L_PTE_CACHEABLE (1 << 3) /* matches PTE */ -#define L_PTE_USER (1 << 4) -#define L_PTE_WRITE (1 << 5) -#define L_PTE_EXEC (1 << 6) -#define L_PTE_DIRTY (1 << 7) +#define L_PTE_BUFFERABLE (1 << 2) /* obsolete, matches PTE */ +#define L_PTE_CACHEABLE (1 << 3) /* obsolete, matches PTE */ +#define L_PTE_DIRTY (1 << 6) +#define L_PTE_WRITE (1 << 7) +#define L_PTE_USER (1 << 8) +#define L_PTE_EXEC (1 << 9) #define L_PTE_SHARED (1 << 10) /* shared(v6), coherent(xsc3) */ +/* + * These are the memory types, defined to be compatible with + * pre-ARMv6 CPUs cacheable and bufferable bits: XXCB + */ +#define L_PTE_MT_UNCACHED (0x00 << 2) /* 0000 */ +#define L_PTE_MT_BUFFERABLE (0x01 << 2) /* 0001 */ +#define L_PTE_MT_WRITETHROUGH (0x02 << 2) /* 0010 */ +#define L_PTE_MT_WRITEBACK (0x03 << 2) /* 0011 */ +#define L_PTE_MT_MINICACHE (0x06 << 2) /* 0110 (sa1100, xscale) */ +#define L_PTE_MT_WRITEALLOC (0x07 << 2) /* 0111 */ +#define L_PTE_MT_DEV_SHARED (0x04 << 2) /* 0100 */ +#define L_PTE_MT_DEV_NONSHARED (0x0c << 2) /* 1100 */ +#define L_PTE_MT_DEV_WC (0x09 << 2) /* 1001 */ +#define L_PTE_MT_DEV_CACHED (0x0b << 2) /* 1011 */ +#define L_PTE_MT_MASK (0x0f << 2) + #ifndef __ASSEMBLY__ /* @@ -180,23 +196,30 @@ extern void __pgd_error(const char *file, int line, unsigned long val); * as well as any architecture dependent bits like global/ASID and SMP * shared mapping bits. */ -#define _L_PTE_DEFAULT L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_CACHEABLE | L_PTE_BUFFERABLE -#define _L_PTE_READ L_PTE_USER | L_PTE_EXEC +#define _L_PTE_DEFAULT L_PTE_PRESENT | L_PTE_YOUNG extern pgprot_t pgprot_user; extern pgprot_t pgprot_kernel; -#define PAGE_NONE pgprot_user -#define PAGE_COPY __pgprot(pgprot_val(pgprot_user) | _L_PTE_READ) -#define PAGE_SHARED __pgprot(pgprot_val(pgprot_user) | _L_PTE_READ | \ - L_PTE_WRITE) -#define PAGE_READONLY __pgprot(pgprot_val(pgprot_user) | _L_PTE_READ) -#define PAGE_KERNEL pgprot_kernel - -#define __PAGE_NONE __pgprot(_L_PTE_DEFAULT) -#define __PAGE_COPY __pgprot(_L_PTE_DEFAULT | _L_PTE_READ) -#define __PAGE_SHARED __pgprot(_L_PTE_DEFAULT | _L_PTE_READ | L_PTE_WRITE) -#define __PAGE_READONLY __pgprot(_L_PTE_DEFAULT | _L_PTE_READ) +#define _MOD_PROT(p, b) __pgprot(pgprot_val(p) | (b)) + +#define PAGE_NONE pgprot_user +#define PAGE_SHARED _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_WRITE) +#define PAGE_SHARED_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_WRITE | L_PTE_EXEC) +#define PAGE_COPY _MOD_PROT(pgprot_user, L_PTE_USER) +#define PAGE_COPY_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_EXEC) +#define PAGE_READONLY _MOD_PROT(pgprot_user, L_PTE_USER) +#define PAGE_READONLY_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_EXEC) +#define PAGE_KERNEL pgprot_kernel +#define PAGE_KERNEL_EXEC _MOD_PROT(pgprot_kernel, L_PTE_EXEC) + +#define __PAGE_NONE __pgprot(_L_PTE_DEFAULT) +#define __PAGE_SHARED __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_WRITE) +#define __PAGE_SHARED_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_WRITE | L_PTE_EXEC) +#define __PAGE_COPY __pgprot(_L_PTE_DEFAULT | L_PTE_USER) +#define __PAGE_COPY_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_EXEC) +#define __PAGE_READONLY __pgprot(_L_PTE_DEFAULT | L_PTE_USER) +#define __PAGE_READONLY_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_EXEC) #endif /* __ASSEMBLY__ */ @@ -212,19 +235,19 @@ extern pgprot_t pgprot_kernel; #define __P001 __PAGE_READONLY #define __P010 __PAGE_COPY #define __P011 __PAGE_COPY -#define __P100 __PAGE_READONLY -#define __P101 __PAGE_READONLY -#define __P110 __PAGE_COPY -#define __P111 __PAGE_COPY +#define __P100 __PAGE_READONLY_EXEC +#define __P101 __PAGE_READONLY_EXEC +#define __P110 __PAGE_COPY_EXEC +#define __P111 __PAGE_COPY_EXEC #define __S000 __PAGE_NONE #define __S001 __PAGE_READONLY #define __S010 __PAGE_SHARED #define __S011 __PAGE_SHARED -#define __S100 __PAGE_READONLY -#define __S101 __PAGE_READONLY -#define __S110 __PAGE_SHARED -#define __S111 __PAGE_SHARED +#define __S100 __PAGE_READONLY_EXEC +#define __S101 __PAGE_READONLY_EXEC +#define __S110 __PAGE_SHARED_EXEC +#define __S111 __PAGE_SHARED_EXEC #ifndef __ASSEMBLY__ /* @@ -286,8 +309,10 @@ static inline pte_t pte_mkspecial(pte_t pte) { return pte; } /* * Mark the prot value as uncacheable and unbufferable. */ -#define pgprot_noncached(prot) __pgprot(pgprot_val(prot) & ~(L_PTE_CACHEABLE | L_PTE_BUFFERABLE)) -#define pgprot_writecombine(prot) __pgprot(pgprot_val(prot) & ~L_PTE_CACHEABLE) +#define pgprot_noncached(prot) \ + __pgprot((pgprot_val(prot) & ~L_PTE_MT_MASK) | L_PTE_MT_UNCACHED) +#define pgprot_writecombine(prot) \ + __pgprot((pgprot_val(prot) & ~L_PTE_MT_MASK) | L_PTE_MT_BUFFERABLE) #define pmd_none(pmd) (!pmd_val(pmd)) #define pmd_present(pmd) (pmd_val(pmd)) @@ -320,11 +345,6 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd) #define pmd_page(pmd) virt_to_page(__va(pmd_val(pmd))) /* - * Permanent address of a page. We never have highmem, so this is trivial. - */ -#define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT)) - -/* * Conversion functions: convert a page and protection to a page entry, * and a page entry and page directory to the page they refer to. */ |