9a88cbb522
Platforms will now have to supply a function dma_device_is_coherent which returns if a particular device participates in the coherence domain. For most platforms this function will always return 0 or 1. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
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*
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*/
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#ifndef __ASM_MACH_IP27_DMA_COHERENCE_H
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#define __ASM_MACH_IP27_DMA_COHERENCE_H
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#include <asm/pci/bridge.h>
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#define pdev_to_baddr(pdev, addr) \
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(BRIDGE_CONTROLLER(pdev->bus)->baddr + (addr))
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#define dev_to_baddr(dev, addr) \
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pdev_to_baddr(to_pci_dev(dev), (addr))
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struct device;
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static dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
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{
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dma_addr_t pa = dev_to_baddr(dev, virt_to_phys(addr));
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return pa;
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}
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static dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
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{
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dma_addr_t pa = dev_to_baddr(dev, page_to_phys(page));
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return pa;
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}
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static unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
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{
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return dma_addr & (0xffUL << 56);
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}
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static void plat_unmap_dma_mem(dma_addr_t dma_addr)
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{
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}
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static inline int plat_device_is_coherent(struct device *dev)
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{
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return 1; /* IP27 non-cohernet mode is unsupported */
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}
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#endif /* __ASM_MACH_IP27_DMA_COHERENCE_H */
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