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 #if defined(CONFIG_ARCH_OMAP15XX) && !defined(__ASSEMBLER__) 22 #include <plat/cpu.h> 23 24 /* 25 * OMAP-1510 Local Bus address offset 26 */ 27 #define OMAP1510_LB_OFFSET UL(0x30000000) 28 29 #define virt_to_lbus(x) ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET) 30 #define lbus_to_virt(x) ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET) 31 #define is_lbus_device(dev) (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0)) 32 33 #define __arch_pfn_to_dma(dev, pfn) \ 34 ({ dma_addr_t __dma = __pfn_to_phys(pfn); \ 35 if (is_lbus_device(dev)) \ 36 __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \ 37 __dma; }) 38 39 #define __arch_dma_to_pfn(dev, addr) \ 40 ({ dma_addr_t __dma = addr; \ 41 if (is_lbus_device(dev)) \ 42 __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET; \ 43 __phys_to_pfn(__dma); \ 44 }) 45 46 #define __arch_dma_to_virt(dev, addr) ({ (void *) (is_lbus_device(dev) ? \ 47 lbus_to_virt(addr) : \ 48 __phys_to_virt(addr)); }) 49 50 #define __arch_virt_to_dma(dev, addr) ({ unsigned long __addr = (unsigned long)(addr); \ 51 (dma_addr_t) (is_lbus_device(dev) ? \ 52 virt_to_lbus(__addr) : \ 53 __virt_to_phys(__addr)); }) 54 55 #endif /* CONFIG_ARCH_OMAP15XX */ 56 57 #endif 58