projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 285f5fa7 DW |
1 | #ifndef __ASM_ARCH_MEMORY_H |
| 2 | #define __ASM_ARCH_MEMORY_H | |
| 3 | ||
| a09e64fb | 4 | #include <mach/hardware.h> |
| 285f5fa7 DW |
5 | |
| 6 | /* | |
| 7 | * Physical DRAM offset. | |
| 8 | */ | |
| f4117ac9 | 9 | #define PLAT_PHYS_OFFSET UL(0x00000000) |
| 285f5fa7 DW |
10 | |
| 11 | #ifndef __ASSEMBLY__ | |
| 12 | ||
| 13 | #if defined(CONFIG_ARCH_IOP13XX) | |
| 14 | #define IOP13XX_PMMR_V_START (IOP13XX_PMMR_VIRT_MEM_BASE) | |
| 15 | #define IOP13XX_PMMR_V_END (IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_SIZE) | |
| 16 | #define IOP13XX_PMMR_P_START (IOP13XX_PMMR_PHYS_MEM_BASE) | |
| 17 | #define IOP13XX_PMMR_P_END (IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_SIZE) | |
| 18 | ||
| abf2ba15 | 19 | static inline dma_addr_t __virt_to_lbus(void __iomem *x) |
| 1562f98f RK |
20 | { |
| 21 | return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE; | |
| 22 | } | |
| 285f5fa7 | 23 | |
| abf2ba15 | 24 | static inline void __iomem *__lbus_to_virt(dma_addr_t x) |
| 1562f98f RK |
25 | { |
| 26 | return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE; | |
| 27 | } | |
| 28 | ||
| 29 | #define __is_lbus_dma(a) \ | |
| 30 | ((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END) | |
| 31 | ||
| 32 | #define __is_lbus_virt(a) \ | |
| 33 | ((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END) | |
| 285f5fa7 DW |
34 | |
| 35 | /* Device is an lbus device if it is on the platform bus of the IOP13XX */ | |
| 1562f98f RK |
36 | #define is_lbus_device(dev) \ |
| 37 | (dev && strncmp(dev->bus->name, "platform", 8) == 0) | |
| 285f5fa7 | 38 | |
| 1562f98f RK |
39 | #define __arch_dma_to_virt(dev, addr) \ |
| 40 | ({ \ | |
| abf2ba15 | 41 | void * __virt; \ |
| 1562f98f RK |
42 | dma_addr_t __dma = addr; \ |
| 43 | if (is_lbus_device(dev) && __is_lbus_dma(__dma)) \ | |
| 44 | __virt = __lbus_to_virt(__dma); \ | |
| 45 | else \ | |
| abf2ba15 AB |
46 | __virt = (void *)__phys_to_virt(__dma); \ |
| 47 | __virt; \ | |
| 1562f98f | 48 | }) |
| 285f5fa7 | 49 | |
| 1562f98f RK |
50 | #define __arch_virt_to_dma(dev, addr) \ |
| 51 | ({ \ | |
| abf2ba15 | 52 | void * __virt = addr; \ |
| 1562f98f RK |
53 | dma_addr_t __dma; \ |
| 54 | if (is_lbus_device(dev) && __is_lbus_virt(__virt)) \ | |
| 55 | __dma = __virt_to_lbus(__virt); \ | |
| 56 | else \ | |
| abf2ba15 | 57 | __dma = __virt_to_phys((unsigned long)__virt); \ |
| 1562f98f RK |
58 | __dma; \ |
| 59 | }) | |
| 285f5fa7 | 60 | |
| 9eedd963 | 61 | #define __arch_pfn_to_dma(dev, pfn) \ |
| 58edb515 NP |
62 | ({ \ |
| 63 | /* __is_lbus_virt() can never be true for RAM pages */ \ | |
| 9eedd963 | 64 | (dma_addr_t)__pfn_to_phys(pfn); \ |
| 58edb515 | 65 | }) |
| 285f5fa7 | 66 | |
| 9eedd963 | 67 | #define __arch_dma_to_pfn(dev, addr) __phys_to_pfn(addr) |
| ef1baed8 | 68 | |
| 285f5fa7 DW |
69 | #endif /* CONFIG_ARCH_IOP13XX */ |
| 70 | #endif /* !ASSEMBLY */ | |
| 71 | ||
| 285f5fa7 | 72 | #endif |