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 /* REVISIT: omap1 legacy drivers still rely on this */ 9 #include <mach/soc.h> 10 11 /* 12 * Bus address is physical address, except for OMAP-1510 Local Bus. 13 * OMAP-1510 bus address is translated into a Local Bus address if the 14 * OMAP bus type is lbus. We do the address translation based on the 15 * device overriding the defaults used in the dma-mapping API. 16 * Note that the is_lbus_device() test is not very efficient on 1510 17 * because of the strncmp(). 18 */ 19 #if defined(CONFIG_ARCH_OMAP15XX) && !defined(__ASSEMBLER__) 20 21 /* 22 * OMAP-1510 Local Bus address offset 23 */ 24 #define OMAP1510_LB_OFFSET UL(0x30000000) 25 26 #define virt_to_lbus(x) ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET) 27 #define lbus_to_virt(x) ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET) 28 #define is_lbus_device(dev) (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0)) 29 30 #define __arch_pfn_to_dma(dev, pfn) \ 31 ({ dma_addr_t __dma = __pfn_to_phys(pfn); \ 32 if (is_lbus_device(dev)) \ 33 __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \ 34 __dma; }) 35 36 #define __arch_dma_to_pfn(dev, addr) \ 37 ({ dma_addr_t __dma = addr; \ 38 if (is_lbus_device(dev)) \ 39 __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET; \ 40 __phys_to_pfn(__dma); \ 41 }) 42 43 #define __arch_dma_to_virt(dev, addr) ({ (void *) (is_lbus_device(dev) ? \ 44 lbus_to_virt(addr) : \ 45 __phys_to_virt(addr)); }) 46 47 #define __arch_virt_to_dma(dev, addr) ({ unsigned long __addr = (unsigned long)(addr); \ 48 (dma_addr_t) (is_lbus_device(dev) ? \ 49 virt_to_lbus(__addr) : \ 50 __virt_to_phys(__addr)); }) 51 52 #endif /* CONFIG_ARCH_OMAP15XX */ 53 54 #endif 55