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author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
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committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/arm/mach-iop13xx/include/mach/memory.h | |
parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
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dirty fix to merging
Diffstat (limited to 'arch/arm/mach-iop13xx/include/mach/memory.h')
-rw-r--r-- | arch/arm/mach-iop13xx/include/mach/memory.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/arm/mach-iop13xx/include/mach/memory.h b/arch/arm/mach-iop13xx/include/mach/memory.h new file mode 100644 index 00000000..1afa99ef --- /dev/null +++ b/arch/arm/mach-iop13xx/include/mach/memory.h @@ -0,0 +1,72 @@ +#ifndef __ASM_ARCH_MEMORY_H +#define __ASM_ARCH_MEMORY_H + +#include <mach/hardware.h> + +/* + * Physical DRAM offset. + */ +#define PLAT_PHYS_OFFSET UL(0x00000000) + +#ifndef __ASSEMBLY__ + +#if defined(CONFIG_ARCH_IOP13XX) +#define IOP13XX_PMMR_V_START (IOP13XX_PMMR_VIRT_MEM_BASE) +#define IOP13XX_PMMR_V_END (IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_SIZE) +#define IOP13XX_PMMR_P_START (IOP13XX_PMMR_PHYS_MEM_BASE) +#define IOP13XX_PMMR_P_END (IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_SIZE) + +static inline dma_addr_t __virt_to_lbus(unsigned long x) +{ + return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE; +} + +static inline unsigned long __lbus_to_virt(dma_addr_t x) +{ + return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE; +} + +#define __is_lbus_dma(a) \ + ((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END) + +#define __is_lbus_virt(a) \ + ((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END) + +/* Device is an lbus device if it is on the platform bus of the IOP13XX */ +#define is_lbus_device(dev) \ + (dev && strncmp(dev->bus->name, "platform", 8) == 0) + +#define __arch_dma_to_virt(dev, addr) \ + ({ \ + unsigned long __virt; \ + dma_addr_t __dma = addr; \ + if (is_lbus_device(dev) && __is_lbus_dma(__dma)) \ + __virt = __lbus_to_virt(__dma); \ + else \ + __virt = __phys_to_virt(__dma); \ + (void *)__virt; \ + }) + +#define __arch_virt_to_dma(dev, addr) \ + ({ \ + unsigned long __virt = (unsigned long)addr; \ + dma_addr_t __dma; \ + if (is_lbus_device(dev) && __is_lbus_virt(__virt)) \ + __dma = __virt_to_lbus(__virt); \ + else \ + __dma = __virt_to_phys(__virt); \ + __dma; \ + }) + +#define __arch_pfn_to_dma(dev, pfn) \ + ({ \ + /* __is_lbus_virt() can never be true for RAM pages */ \ + (dma_addr_t)__pfn_to_phys(pfn); \ + }) + +#define __arch_dma_to_pfn(dev, addr) __phys_to_pfn(addr) + +#endif /* CONFIG_ARCH_IOP13XX */ +#endif /* !ASSEMBLY */ + +#endif |