diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2005-04-19 12:26:59 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2005-10-29 19:31:09 +0100 |
| commit | 9447cbfc7a95225e9214ccc225c063b305038a34 (patch) | |
| tree | 23fa3c2efa1e13355e1e0f728a86d559a85798b4 /include | |
| parent | ecba36dad8b635174bcbc32998a019b6d1e6f12f (diff) | |
| download | linux-9447cbfc7a95225e9214ccc225c063b305038a34.tar.gz | |
Fix D-cache aliasing problem in the PIO IDE driver potencially resulting
in the kernel or userspace seeing stale data.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-mips/mach-generic/ide.h | 73 |
1 files changed, 65 insertions, 8 deletions
diff --git a/include/asm-mips/mach-generic/ide.h b/include/asm-mips/mach-generic/ide.h index cb2edd018ad63..961006948c7c9 100644 --- a/include/asm-mips/mach-generic/ide.h +++ b/include/asm-mips/mach-generic/ide.h @@ -18,6 +18,7 @@ #include <linux/config.h> #include <linux/pci.h> #include <linux/stddef.h> +#include <asm/processor.h> #ifndef MAX_HWIFS # ifdef CONFIG_BLK_DEV_IDEPCI @@ -104,15 +105,71 @@ static __inline__ unsigned long ide_default_io_base(int index) /* MIPS port and memory-mapped I/O string operations. */ -#define __ide_insw insw -#define __ide_insl insl -#define __ide_outsw outsw -#define __ide_outsl outsl +static inline void __ide_flush_dcache_range(unsigned long addr, unsigned long size) +{ + if (cpu_has_dc_aliases) { + unsigned long end = addr + size; + for (; addr < end; addr += PAGE_SIZE) + flush_dcache_page(virt_to_page(addr)); + } +} + +static inline void __ide_insw(unsigned long port, void *addr, + unsigned int count) +{ + insw(port, addr, count); + __ide_flush_dcache_range((unsigned long)addr, count * 2); +} + +static inline void __ide_insl(unsigned long port, void *addr, unsigned int count) +{ + insl(port, addr, count); + __ide_flush_dcache_range((unsigned long)addr, count * 4); +} + +static inline void __ide_outsw(unsigned long port, const void *addr, + unsigned long count) +{ + outsw(port, addr, count); + __ide_flush_dcache_range((unsigned long)addr, count * 2); +} + +static inline void __ide_outsl(unsigned long port, const void *addr, + unsigned long count) +{ + outsl(port, addr, count); + __ide_flush_dcache_range((unsigned long)addr, count * 4); +} + +static inline void __ide_mm_insw(void __iomem *port, void *addr, u32 count) +{ + readsw(port, addr, count); + __ide_flush_dcache_range((unsigned long)addr, count * 2); +} + +static inline void __ide_mm_insl(void __iomem *port, void *addr, u32 count) +{ + readsl(port, addr, count); + __ide_flush_dcache_range((unsigned long)addr, count * 4); +} + +static inline void __ide_mm_outsw(void __iomem *port, void *addr, u32 count) +{ + writesw(port, addr, count); + __ide_flush_dcache_range((unsigned long)addr, count * 2); +} + +static inline void __ide_mm_outsl(void __iomem * port, void *addr, u32 count) +{ + writesl(port, addr, count); + __ide_flush_dcache_range((unsigned long)addr, count * 4); +} -#define __ide_mm_insw readsw -#define __ide_mm_insl readsl -#define __ide_mm_outsw writesw -#define __ide_mm_outsl writesl +/* ide_insw calls insw, not __ide_insw. Why? */ +#undef insw +#undef insl +#define insw(port, addr, count) __ide_insw(port, addr, count) +#define insl(port, addr, count) __ide_insl(port, addr, count) #endif /* __KERNEL__ */ |