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| author | LEROY Christophe <christophe.leroy@c-s.fr> | 2015-01-19 17:04:38 +0100 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-01-29 20:11:51 -0600 |
| commit | a7b9f671f2d141528491c346e21e8a179cee9d21 (patch) | |
| tree | 963edf92d3bc966992c78c4fa94d368003f9b396 /arch/powerpc/include/asm/pte-common.h | |
| parent | d2caa3cebda8b626336e100b80a0ed6f909dccab (diff) | |
| download | blackbird-op-linux-a7b9f671f2d141528491c346e21e8a179cee9d21.tar.gz blackbird-op-linux-a7b9f671f2d141528491c346e21e8a179cee9d21.zip | |
powerpc32: adds handling of _PAGE_RO
Some powerpc like the 8xx don't have a RW bit in PTE bits but a RO
(Read Only) bit. This patch implements the handling of a _PAGE_RO flag
to be used in place of _PAGE_RW
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[scottwood@freescale.com: fix whitespace]
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/include/asm/pte-common.h')
| -rw-r--r-- | arch/powerpc/include/asm/pte-common.h | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/arch/powerpc/include/asm/pte-common.h b/arch/powerpc/include/asm/pte-common.h index e040c3595129..2aef9b7a0eb2 100644 --- a/arch/powerpc/include/asm/pte-common.h +++ b/arch/powerpc/include/asm/pte-common.h @@ -34,6 +34,12 @@ #ifndef _PAGE_PSIZE #define _PAGE_PSIZE 0 #endif +/* _PAGE_RO and _PAGE_RW shall not be defined at the same time */ +#ifndef _PAGE_RO +#define _PAGE_RO 0 +#else +#define _PAGE_RW 0 +#endif #ifndef _PMD_PRESENT_MASK #define _PMD_PRESENT_MASK _PMD_PRESENT #endif @@ -42,10 +48,10 @@ #define PMD_PAGE_SIZE(pmd) bad_call_to_PMD_PAGE_SIZE() #endif #ifndef _PAGE_KERNEL_RO -#define _PAGE_KERNEL_RO 0 +#define _PAGE_KERNEL_RO (_PAGE_RO) #endif #ifndef _PAGE_KERNEL_ROX -#define _PAGE_KERNEL_ROX (_PAGE_EXEC) +#define _PAGE_KERNEL_ROX (_PAGE_EXEC | _PAGE_RO) #endif #ifndef _PAGE_KERNEL_RW #define _PAGE_KERNEL_RW (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE) @@ -95,7 +101,7 @@ extern unsigned long bad_call_to_PMD_PAGE_SIZE(void); /* Mask of bits returned by pte_pgprot() */ #define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_COHERENT | _PAGE_NO_CACHE | \ _PAGE_WRITETHRU | _PAGE_ENDIAN | _PAGE_4K_PFN | \ - _PAGE_USER | _PAGE_ACCESSED | \ + _PAGE_USER | _PAGE_ACCESSED | _PAGE_RO | \ _PAGE_RW | _PAGE_HWWRITE | _PAGE_DIRTY | _PAGE_EXEC) #ifdef CONFIG_NUMA_BALANCING @@ -128,11 +134,14 @@ extern unsigned long bad_call_to_PMD_PAGE_SIZE(void); */ #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_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | \ + _PAGE_EXEC) +#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO) +#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO | \ + _PAGE_EXEC) +#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO) +#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO | \ + _PAGE_EXEC) #define __P000 PAGE_NONE #define __P001 PAGE_READONLY |
