diff options
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/fixmap.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/pgtable-ppc32.h | 41 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/pgtable-ppc64.h | 46 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/pgtable.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/pte-8xx.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/pte-hash32.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/pte-hash64-4k.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/pte-hash64.h | 47 |
8 files changed, 83 insertions, 64 deletions
diff --git a/arch/powerpc/include/asm/fixmap.h b/arch/powerpc/include/asm/fixmap.h index 8428b38a3d3..d60fd18f428 100644 --- a/arch/powerpc/include/asm/fixmap.h +++ b/arch/powerpc/include/asm/fixmap.h @@ -61,7 +61,7 @@ extern void __set_fixmap (enum fixed_addresses idx, * Some hardware wants to get fixmapped without caching. */ #define set_fixmap_nocache(idx, phys) \ - __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE) + __set_fixmap(idx, phys, PAGE_KERNEL_NCG) #define clear_fixmap(idx) \ __set_fixmap(idx, 0, __pgprot(0)) diff --git a/arch/powerpc/include/asm/pgtable-ppc32.h b/arch/powerpc/include/asm/pgtable-ppc32.h index 67ceffc01b4..7ce331e51f9 100644 --- a/arch/powerpc/include/asm/pgtable-ppc32.h +++ b/arch/powerpc/include/asm/pgtable-ppc32.h @@ -144,6 +144,13 @@ extern int icache_44x_need_flush; #define PMD_PAGE_SIZE(pmd) bad_call_to_PMD_PAGE_SIZE() #endif +#ifndef _PAGE_KERNEL_RO +#define _PAGE_KERNEL_RO 0 +#endif +#ifndef _PAGE_KERNEL_RW +#define _PAGE_KERNEL_RW (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE) +#endif + #define _PAGE_HPTEFLAGS _PAGE_HASHPTE /* Location of the PFN in the PTE. Most platforms use the same as _PAGE_SHIFT @@ -186,30 +193,25 @@ extern int icache_44x_need_flush; #else #define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED) #endif -#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_NO_CACHE) - -#define _PAGE_WRENABLE (_PAGE_RW | _PAGE_DIRTY | _PAGE_HWWRITE) -#define _PAGE_KERNEL (_PAGE_BASE | _PAGE_SHARED | _PAGE_WRENABLE) -#define _PAGE_KERNEL_NC (_PAGE_BASE_NC | _PAGE_SHARED | _PAGE_WRENABLE) - -#ifdef CONFIG_PPC_STD_MMU -/* On standard PPC MMU, no user access implies kernel read/write access, - * so to write-protect kernel memory we must turn on user access */ -#define _PAGE_KERNEL_RO (_PAGE_BASE | _PAGE_SHARED | _PAGE_USER) -#else -#define _PAGE_KERNEL_RO (_PAGE_BASE | _PAGE_SHARED) -#endif - -#define _PAGE_IO (_PAGE_KERNEL_NC | _PAGE_GUARDED) -#define _PAGE_RAM (_PAGE_KERNEL | _PAGE_HWEXEC) +#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED) + +/* 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) #if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) ||\ defined(CONFIG_KPROBES) /* We want the debuggers to be able to set breakpoints anywhere, so * don't write protect the kernel text */ -#define _PAGE_RAM_TEXT _PAGE_RAM +#define PAGE_KERNEL_TEXT PAGE_KERNEL_X #else -#define _PAGE_RAM_TEXT (_PAGE_KERNEL_RO | _PAGE_HWEXEC) +#define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX #endif #define PAGE_NONE __pgprot(_PAGE_BASE) @@ -220,9 +222,6 @@ extern int icache_44x_need_flush; #define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER) #define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC) -#define PAGE_KERNEL __pgprot(_PAGE_RAM) -#define PAGE_KERNEL_NOCACHE __pgprot(_PAGE_IO) - /* * The PowerPC can only do execute protection on a segment (256MB) basis, * not on a page basis. So we consider execute permission the same as read. diff --git a/arch/powerpc/include/asm/pgtable-ppc64.h b/arch/powerpc/include/asm/pgtable-ppc64.h index 542073836b2..5a575f2905f 100644 --- a/arch/powerpc/include/asm/pgtable-ppc64.h +++ b/arch/powerpc/include/asm/pgtable-ppc64.h @@ -81,11 +81,6 @@ */ #include <asm/pte-hash64.h> -/* To make some generic powerpc code happy */ -#ifndef _PAGE_HWEXEC -#define _PAGE_HWEXEC 0 -#endif - /* Some other useful definitions */ #define PTE_RPN_MAX (1UL << (64 - PTE_RPN_SHIFT)) #define PTE_RPN_MASK (~((1UL<<PTE_RPN_SHIFT)-1)) @@ -96,28 +91,44 @@ #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) -/* __pgprot defined in arch/powerpc/include/asm/page.h */ -#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED) - -#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_USER) -#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_USER | _PAGE_EXEC) +/* 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) -#define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_WRENABLE) -#define PAGE_KERNEL_CI __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \ - _PAGE_WRENABLE | _PAGE_NO_CACHE | _PAGE_GUARDED) -#define PAGE_KERNEL_EXEC __pgprot(_PAGE_BASE | _PAGE_WRENABLE | _PAGE_EXEC) -#define PAGE_AGP __pgprot(_PAGE_BASE | _PAGE_WRENABLE | _PAGE_NO_CACHE) -#define HAVE_PAGE_AGP +/* 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 @@ -395,7 +406,8 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr, static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry) { unsigned long bits = pte_val(entry) & - (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC); + (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | + _PAGE_EXEC | _PAGE_HWEXEC); unsigned long old, tmp; __asm__ __volatile__( diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h index 5c1c4880723..81574f94ea3 100644 --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -25,6 +25,10 @@ static inline void assert_pte_locked(struct mm_struct *mm, unsigned long addr) # include <asm/pgtable-ppc32.h> #endif +/* Special mapping for AGP */ +#define PAGE_AGP (PAGE_KERNEL_NC) +#define HAVE_PAGE_AGP + #ifndef __ASSEMBLY__ /* Insert a PTE, top-level function is out of line. It uses an inline diff --git a/arch/powerpc/include/asm/pte-8xx.h b/arch/powerpc/include/asm/pte-8xx.h index b07acfd330b..8c6e3125103 100644 --- a/arch/powerpc/include/asm/pte-8xx.h +++ b/arch/powerpc/include/asm/pte-8xx.h @@ -59,6 +59,9 @@ /* Until my rework is finished, 8xx still needs atomic PTE updates */ #define PTE_ATOMIC_UPDATES 1 +/* We need to add _PAGE_SHARED to kernel pages */ +#define _PAGE_KERNEL_RO (_PAGE_SHARED) +#define _PAGE_KERNEL_RW (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE) #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_PTE_8xx_H */ diff --git a/arch/powerpc/include/asm/pte-hash32.h b/arch/powerpc/include/asm/pte-hash32.h index 6afe22b02f2..16e571c7f9e 100644 --- a/arch/powerpc/include/asm/pte-hash32.h +++ b/arch/powerpc/include/asm/pte-hash32.h @@ -44,6 +44,5 @@ /* Hash table based platforms need atomic updates of the linux PTE */ #define PTE_ATOMIC_UPDATES 1 - #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_PTE_HASH32_H */ diff --git a/arch/powerpc/include/asm/pte-hash64-4k.h b/arch/powerpc/include/asm/pte-hash64-4k.h index 29fdc158fe3..c134e809aac 100644 --- a/arch/powerpc/include/asm/pte-hash64-4k.h +++ b/arch/powerpc/include/asm/pte-hash64-4k.h @@ -8,9 +8,6 @@ #define _PAGE_F_GIX _PAGE_GROUP_IX #define _PAGE_SPECIAL 0x10000 /* software: special page */ -/* There is no 4K PFN hack on 4K pages */ -#define _PAGE_4K_PFN 0 - /* PTE flags to conserve for HPTE identification */ #define _PAGE_HPTEFLAGS (_PAGE_BUSY | _PAGE_HASHPTE | \ _PAGE_SECONDARY | _PAGE_GROUP_IX) diff --git a/arch/powerpc/include/asm/pte-hash64.h b/arch/powerpc/include/asm/pte-hash64.h index 62766636cc1..b61b7e4a18d 100644 --- a/arch/powerpc/include/asm/pte-hash64.h +++ b/arch/powerpc/include/asm/pte-hash64.h @@ -6,36 +6,41 @@ * Common bits between 4K and 64K pages in a linux-style PTE. * These match the bits in the (hardware-defined) PowerPC PTE as closely * as possible. Additional bits may be defined in pgtable-hash64-*.h + * + * Note: We only support user read/write permissions. Supervisor always + * have full read/write to pages above PAGE_OFFSET (pages below that + * always use the user access permissions). + * + * We could create separate kernel read-only if we used the 3 PP bits + * combinations that newer processors provide but we currently don't. */ -#define _PAGE_PRESENT 0x0001 /* software: pte contains a translation */ -#define _PAGE_USER 0x0002 /* matches one of the PP bits */ -#define _PAGE_FILE 0x0002 /* (!present only) software: pte holds file offset */ -#define _PAGE_EXEC 0x0004 /* No execute on POWER4 and newer (we invert) */ -#define _PAGE_GUARDED 0x0008 -#define _PAGE_COHERENT 0x0010 /* M: enforce memory coherence (SMP systems) */ -#define _PAGE_NO_CACHE 0x0020 /* I: cache inhibit */ -#define _PAGE_WRITETHRU 0x0040 /* W: cache write-through */ -#define _PAGE_DIRTY 0x0080 /* C: page changed */ -#define _PAGE_ACCESSED 0x0100 /* R: page referenced */ -#define _PAGE_RW 0x0200 /* software: user write access allowed */ -#define _PAGE_BUSY 0x0800 /* software: PTE & hash are busy */ +#define _PAGE_PRESENT 0x0001 /* software: pte contains a translation */ +#define _PAGE_USER 0x0002 /* matches one of the PP bits */ +#define _PAGE_FILE 0x0002 /* (!present only) software: pte holds file offset */ +#define _PAGE_EXEC 0x0004 /* No execute on POWER4 and newer (we invert) */ +#define _PAGE_GUARDED 0x0008 +#define _PAGE_COHERENT 0x0010 /* M: enforce memory coherence (SMP systems) */ +#define _PAGE_NO_CACHE 0x0020 /* I: cache inhibit */ +#define _PAGE_WRITETHRU 0x0040 /* W: cache write-through */ +#define _PAGE_DIRTY 0x0080 /* C: page changed */ +#define _PAGE_ACCESSED 0x0100 /* R: page referenced */ +#define _PAGE_RW 0x0200 /* software: user write access allowed */ +#define _PAGE_BUSY 0x0800 /* software: PTE & hash are busy */ + +/* No separate kernel read-only */ +#define _PAGE_KERNEL_RW (_PAGE_RW | _PAGE_DIRTY) /* user access blocked by key */ +#define _PAGE_KERNEL_RO _PAGE_KERNEL_RW /* Strong Access Ordering */ -#define _PAGE_SAO (_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT) +#define _PAGE_SAO (_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT) -#define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_COHERENT) - -#define _PAGE_WRENABLE (_PAGE_RW | _PAGE_DIRTY) +/* No page size encoding in the linux PTE */ +#define _PAGE_PSIZE 0 /* PTEIDX nibble */ #define _PTEIDX_SECONDARY 0x8 #define _PTEIDX_GROUP_IX 0x7 -#define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_COHERENT | \ - _PAGE_NO_CACHE | _PAGE_WRITETHRU | \ - _PAGE_4K_PFN | _PAGE_RW | _PAGE_USER | \ - _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_EXEC) - #ifdef CONFIG_PPC_64K_PAGES #include <asm/pte-hash64-64k.h> |