projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 3eff851b TL |
1 | /* |
| 2 | * arch/arm/mach-omap1/include/mach/memory.h | |
| 3 | */ | |
| 4 | ||
| ee581ae8 NP |
5 | #ifndef __ASM_ARCH_MEMORY_H |
| 6 | #define __ASM_ARCH_MEMORY_H | |
| 7 | ||
| ee581ae8 NP |
8 | /* |
| 9 | * Bus address is physical address, except for OMAP-1510 Local Bus. | |
| 10 | * OMAP-1510 bus address is translated into a Local Bus address if the | |
| 11 | * OMAP bus type is lbus. We do the address translation based on the | |
| 12 | * device overriding the defaults used in the dma-mapping API. | |
| 13 | * Note that the is_lbus_device() test is not very efficient on 1510 | |
| 14 | * because of the strncmp(). | |
| 15 | */ | |
| 2c799cef | 16 | #if defined(CONFIG_ARCH_OMAP15XX) && !defined(__ASSEMBLER__) |
| 4e969010 | 17 | #include <mach/soc.h> |
| ee581ae8 NP |
18 | |
| 19 | /* | |
| 20 | * OMAP-1510 Local Bus address offset | |
| 21 | */ | |
| 22 | #define OMAP1510_LB_OFFSET UL(0x30000000) | |
| 23 | ||
| 24 | #define virt_to_lbus(x) ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET) | |
| 25 | #define lbus_to_virt(x) ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET) | |
| 26 | #define is_lbus_device(dev) (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0)) | |
| 27 | ||
| 28 | #define __arch_pfn_to_dma(dev, pfn) \ | |
| 29 | ({ dma_addr_t __dma = __pfn_to_phys(pfn); \ | |
| 30 | if (is_lbus_device(dev)) \ | |
| 31 | __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \ | |
| 32 | __dma; }) | |
| 33 | ||
| 34 | #define __arch_dma_to_pfn(dev, addr) \ | |
| 35 | ({ dma_addr_t __dma = addr; \ | |
| 36 | if (is_lbus_device(dev)) \ | |
| 37 | __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET; \ | |
| 38 | __phys_to_pfn(__dma); \ | |
| 39 | }) | |
| 40 | ||
| 41 | #define __arch_dma_to_virt(dev, addr) ({ (void *) (is_lbus_device(dev) ? \ | |
| 42 | lbus_to_virt(addr) : \ | |
| 43 | __phys_to_virt(addr)); }) | |
| 44 | ||
| 45 | #define __arch_virt_to_dma(dev, addr) ({ unsigned long __addr = (unsigned long)(addr); \ | |
| 46 | (dma_addr_t) (is_lbus_device(dev) ? \ | |
| 47 | virt_to_lbus(__addr) : \ | |
| 48 | __virt_to_phys(__addr)); }) | |
| 49 | ||
| 50 | #endif /* CONFIG_ARCH_OMAP15XX */ | |
| 51 | ||
| 52 | #endif |