Tony Lindgren | 3eff851 | 2009-10-19 17:32:58 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-omap1/include/mach/memory.h |
| 3 | */ |
| 4 | |
Nicolas Pitre | ee581ae | 2011-07-05 22:52:52 -0400 | [diff] [blame] | 5 | #ifndef __ASM_ARCH_MEMORY_H |
| 6 | #define __ASM_ARCH_MEMORY_H |
| 7 | |
| 8 | /* |
| 9 | * Physical DRAM offset. |
| 10 | */ |
| 11 | #define PLAT_PHYS_OFFSET UL(0x10000000) |
| 12 | |
| 13 | /* |
| 14 | * Bus address is physical address, except for OMAP-1510 Local Bus. |
| 15 | * OMAP-1510 bus address is translated into a Local Bus address if the |
| 16 | * OMAP bus type is lbus. We do the address translation based on the |
| 17 | * device overriding the defaults used in the dma-mapping API. |
| 18 | * Note that the is_lbus_device() test is not very efficient on 1510 |
| 19 | * because of the strncmp(). |
| 20 | */ |
| 21 | #ifdef CONFIG_ARCH_OMAP15XX |
| 22 | |
| 23 | /* |
| 24 | * OMAP-1510 Local Bus address offset |
| 25 | */ |
| 26 | #define OMAP1510_LB_OFFSET UL(0x30000000) |
| 27 | |
| 28 | #define virt_to_lbus(x) ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET) |
| 29 | #define lbus_to_virt(x) ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET) |
| 30 | #define is_lbus_device(dev) (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0)) |
| 31 | |
| 32 | #define __arch_pfn_to_dma(dev, pfn) \ |
| 33 | ({ dma_addr_t __dma = __pfn_to_phys(pfn); \ |
| 34 | if (is_lbus_device(dev)) \ |
| 35 | __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \ |
| 36 | __dma; }) |
| 37 | |
| 38 | #define __arch_dma_to_pfn(dev, addr) \ |
| 39 | ({ dma_addr_t __dma = addr; \ |
| 40 | if (is_lbus_device(dev)) \ |
| 41 | __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET; \ |
| 42 | __phys_to_pfn(__dma); \ |
| 43 | }) |
| 44 | |
| 45 | #define __arch_dma_to_virt(dev, addr) ({ (void *) (is_lbus_device(dev) ? \ |
| 46 | lbus_to_virt(addr) : \ |
| 47 | __phys_to_virt(addr)); }) |
| 48 | |
| 49 | #define __arch_virt_to_dma(dev, addr) ({ unsigned long __addr = (unsigned long)(addr); \ |
| 50 | (dma_addr_t) (is_lbus_device(dev) ? \ |
| 51 | virt_to_lbus(__addr) : \ |
| 52 | __virt_to_phys(__addr)); }) |
| 53 | |
| 54 | #endif /* CONFIG_ARCH_OMAP15XX */ |
| 55 | |
| 56 | #endif |