/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2006, 07 Ralf Baechle <ralf@linux-mips.org> * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology * Author: Fuxin Zhang, zhangfx@lemote.com * */ #ifndef __ASM_MACH_LOONGSON_DMA_COHERENCE_H #define __ASM_MACH_LOONGSON_DMA_COHERENCE_H struct device; static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size) { return virt_to_phys(addr) | 0x80000000; } static inline dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page) { return page_to_phys(page) | 0x80000000; } static inline unsigned long plat_dma_addr_to_phys(struct device *dev, dma_addr_t dma_addr) { #if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT) return (dma_addr > 0x8fffffff) ? dma_addr : (dma_addr & 0x0fffffff); #else return dma_addr & 0x7fffffff; #endif } static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr, size_t size, enum dma_data_direction direction) { } static inline int plat_dma_supported(struct device *dev, u64 mask) { /* * we fall back to GFP_DMA when the mask isn't all 1s, * so we can't guarantee allocations that must be * within a tighter range than GFP_DMA.. */ if (mask < DMA_BIT_MASK(24)) return 0; return 1; } static inline void plat_extra_sync_for_device(struct device *dev) { return; } static inline int plat_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { return 0; } static inline int plat_device_is_coherent(struct device *dev) { return 0; } #endif /* __ASM_MACH_LOONGSON_DMA_COHERENCE_H */