1 /* 2 * arch/arm/mach-omap1/include/mach/memory.h 3 */ 4 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 57