1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * arch/arm/mach-omap1/include/mach/memory.h 4 */ 5 6 #ifndef __ASM_ARCH_MEMORY_H 7 #define __ASM_ARCH_MEMORY_H 8 9 /* REVISIT: omap1 legacy drivers still rely on this */ 10 #include <mach/soc.h> 11 12 /* 13 * Bus address is physical address, except for OMAP-1510 Local Bus. 14 * OMAP-1510 bus address is translated into a Local Bus address if the 15 * OMAP bus type is lbus. We do the address translation based on the 16 * device overriding the defaults used in the dma-mapping API. 17 * Note that the is_lbus_device() test is not very efficient on 1510 18 * because of the strncmp(). 19 */ 20 #if defined(CONFIG_ARCH_OMAP15XX) && !defined(__ASSEMBLER__) 21 22 /* 23 * OMAP-1510 Local Bus address offset 24 */ 25 #define OMAP1510_LB_OFFSET UL(0x30000000) 26 27 #define virt_to_lbus(x) ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET) 28 #define lbus_to_virt(x) ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET) 29 #define is_lbus_device(dev) (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0)) 30 31 #define __arch_pfn_to_dma(dev, pfn) \ 32 ({ dma_addr_t __dma = __pfn_to_phys(pfn); \ 33 if (is_lbus_device(dev)) \ 34 __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \ 35 __dma; }) 36 37 #define __arch_dma_to_pfn(dev, addr) \ 38 ({ dma_addr_t __dma = addr; \ 39 if (is_lbus_device(dev)) \ 40 __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET; \ 41 __phys_to_pfn(__dma); \ 42 }) 43 44 #define __arch_dma_to_virt(dev, addr) ({ (void *) (is_lbus_device(dev) ? \ 45 lbus_to_virt(addr) : \ 46 __phys_to_virt(addr)); }) 47 48 #define __arch_virt_to_dma(dev, addr) ({ unsigned long __addr = (unsigned long)(addr); \ 49 (dma_addr_t) (is_lbus_device(dev) ? \ 50 virt_to_lbus(__addr) : \ 51 __virt_to_phys(__addr)); }) 52 53 #endif /* CONFIG_ARCH_OMAP15XX */ 54 55 #endif 56
