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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-03-19 19:34:09 +0000 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-03-24 13:47:33 +1100 |
commit | 71087002cf807e25056dba4e4028a9f204dc9ffd (patch) | |
tree | 60b64edb2c79b3183bb8187a3492994a72453b94 /arch/powerpc/include/asm/pgtable-ppc64.h | |
parent | 8d1cf34e7ad5c7738ce20d20bd7f002f562cb8b5 (diff) | |
download | linux-stable-71087002cf807e25056dba4e4028a9f204dc9ffd.tar.gz linux-stable-71087002cf807e25056dba4e4028a9f204dc9ffd.tar.bz2 linux-stable-71087002cf807e25056dba4e4028a9f204dc9ffd.zip |
powerpc/mm: Merge various PTE bits and accessors definitions
Now that they are almost identical, we can merge some of the definitions
related to the PTE format into common files.
This creates a new pte-common.h which is included by both 32 and 64-bit
right after the CPU specific pte-*.h file, and which defines some
bits to "default" values if they haven't been defined already, and
then provides a generic definition of most of the bit combinations
based on these and exposed to the rest of the kernel.
I also moved to the common pgtable.h most of the "small" accessors to the
PTE bits and modification helpers (pte_mk*). The actual accessors remain
in their separate files.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/pgtable-ppc64.h')
-rw-r--r-- | arch/powerpc/include/asm/pgtable-ppc64.h | 132 |
1 files changed, 1 insertions, 131 deletions
diff --git a/arch/powerpc/include/asm/pgtable-ppc64.h b/arch/powerpc/include/asm/pgtable-ppc64.h index 5a575f2905f5..768e0f08f009 100644 --- a/arch/powerpc/include/asm/pgtable-ppc64.h +++ b/arch/powerpc/include/asm/pgtable-ppc64.h @@ -80,82 +80,8 @@ * Include the PTE bits definitions */ #include <asm/pte-hash64.h> +#include <asm/pte-common.h> -/* Some other useful definitions */ -#define PTE_RPN_MAX (1UL << (64 - PTE_RPN_SHIFT)) -#define PTE_RPN_MASK (~((1UL<<PTE_RPN_SHIFT)-1)) - -/* _PAGE_CHG_MASK masks of bits that are to be preserved accross - * pgprot changes - */ -#define _PAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \ - _PAGE_ACCESSED | _PAGE_SPECIAL) - -#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE) -#define _PAGE_BASE (_PAGE_BASE_NC | _PAGE_COHERENT) - - -/* Permission masks used to generate the __P and __S table, - * - * Note:__pgprot is defined in arch/powerpc/include/asm/page.h - */ -#define PAGE_NONE __pgprot(_PAGE_BASE) -#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW) -#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | _PAGE_EXEC) -#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER) -#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC) -#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER) -#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC) - -/* Permission masks used for kernel mappings */ -#define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW) -#define PAGE_KERNEL_NC __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \ - _PAGE_NO_CACHE) -#define PAGE_KERNEL_NCG __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \ - _PAGE_NO_CACHE | _PAGE_GUARDED) -#define PAGE_KERNEL_X __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW | _PAGE_EXEC) -#define PAGE_KERNEL_RO __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO) -#define PAGE_KERNEL_ROX __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO | _PAGE_EXEC) - -/* Protection bits for use by pte_pgprot() */ -#define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_COHERENT | \ - _PAGE_NO_CACHE | _PAGE_WRITETHRU | \ - _PAGE_4K_PFN | _PAGE_USER | _PAGE_RW | \ - _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_EXEC) - - -/* We always have _PAGE_SPECIAL on 64 bit */ -#define __HAVE_ARCH_PTE_SPECIAL - -/* Make modules code happy. We don't set RO yet */ -#define PAGE_KERNEL_EXEC PAGE_KERNEL_X - -/* - * POWER4 and newer have per page execute protection, older chips can only - * do this on a segment (256MB) basis. - * - * Also, write permissions imply read permissions. - * This is the closest we can get.. - * - * Note due to the way vm flags are laid out, the bits are XWR - */ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY_X -#define __P101 PAGE_READONLY_X -#define __P110 PAGE_COPY_X -#define __P111 PAGE_COPY_X - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY_X -#define __S101 PAGE_READONLY_X -#define __S110 PAGE_SHARED_X -#define __S111 PAGE_SHARED_X #ifdef CONFIG_PPC_MM_SLICES #define HAVE_ARCH_UNMAPPED_AREA @@ -196,34 +122,8 @@ #endif /* __real_pte */ -/* - * Conversion functions: convert a page and protection to a page entry, - * and a page entry and page directory to the page they refer to. - * - * mk_pte takes a (struct page *) as input - */ -#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) - -static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot) -{ - pte_t pte; - - - pte_val(pte) = (pfn << PTE_RPN_SHIFT) | pgprot_val(pgprot); - return pte; -} - -#define pte_modify(_pte, newprot) \ - (__pte((pte_val(_pte) & _PAGE_CHG_MASK) | pgprot_val(newprot))) - -#define pte_none(pte) ((pte_val(pte) & ~_PAGE_HPTEFLAGS) == 0) -#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) - /* pte_clear moved to later in this file */ -#define pte_pfn(x) ((unsigned long)((pte_val(x)>>PTE_RPN_SHIFT))) -#define pte_page(x) pfn_to_page(pte_pfn(x)) - #define PMD_BAD_BITS (PTE_TABLE_SIZE-1) #define PUD_BAD_BITS (PMD_TABLE_SIZE-1) @@ -271,36 +171,6 @@ static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot) /* This now only contains the vmalloc pages */ #define pgd_offset_k(address) pgd_offset(&init_mm, address) -/* - * The following only work if pte_present() is true. - * Undefined behaviour if not.. - */ -static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW;} -static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY;} -static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED;} -static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE;} -static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; } - -static inline pte_t pte_wrprotect(pte_t pte) { - pte_val(pte) &= ~(_PAGE_RW); return pte; } -static inline pte_t pte_mkclean(pte_t pte) { - pte_val(pte) &= ~(_PAGE_DIRTY); return pte; } -static inline pte_t pte_mkold(pte_t pte) { - pte_val(pte) &= ~_PAGE_ACCESSED; return pte; } -static inline pte_t pte_mkwrite(pte_t pte) { - pte_val(pte) |= _PAGE_RW; return pte; } -static inline pte_t pte_mkdirty(pte_t pte) { - pte_val(pte) |= _PAGE_DIRTY; return pte; } -static inline pte_t pte_mkyoung(pte_t pte) { - pte_val(pte) |= _PAGE_ACCESSED; return pte; } -static inline pte_t pte_mkhuge(pte_t pte) { - return pte; } -static inline pte_t pte_mkspecial(pte_t pte) { - pte_val(pte) |= _PAGE_SPECIAL; return pte; } -static inline pgprot_t pte_pgprot(pte_t pte) -{ - return __pgprot(pte_val(pte) & PAGE_PROT_BITS); -} /* Atomic PTE updates */ static inline unsigned long pte_update(struct mm_struct *mm, |