diff options
Diffstat (limited to 'arch/mips/include/asm/mach-bmips')
| -rw-r--r-- | arch/mips/include/asm/mach-bmips/dma-coherence.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-bmips/dma-coherence.h b/arch/mips/include/asm/mach-bmips/dma-coherence.h index 509ab72725eb..ee3c713d642e 100644 --- a/arch/mips/include/asm/mach-bmips/dma-coherence.h +++ b/arch/mips/include/asm/mach-bmips/dma-coherence.h @@ -15,6 +15,10 @@ #ifndef __ASM_MACH_BMIPS_DMA_COHERENCE_H #define __ASM_MACH_BMIPS_DMA_COHERENCE_H +#include <asm/bmips.h> +#include <asm/cpu-type.h> +#include <asm/cpu.h> + struct device; extern dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size); @@ -47,6 +51,18 @@ static inline int plat_device_is_coherent(struct device *dev) static inline void plat_post_dma_flush(struct device *dev) { + void __iomem *cbr = BMIPS_GET_CBR(); + u32 cfg; + + if (boot_cpu_type() != CPU_BMIPS3300 && + boot_cpu_type() != CPU_BMIPS4350 && + boot_cpu_type() != CPU_BMIPS4380) + return; + + /* Flush stale data out of the readahead cache */ + cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG); + __raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG); + __raw_readl(cbr + BMIPS_RAC_CONFIG); } #endif /* __ASM_MACH_BMIPS_DMA_COHERENCE_H */ |