73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
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#ifndef __ASM_ARCH_MEMORY_H
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#define __ASM_ARCH_MEMORY_H
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#include <mach/hardware.h>
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/*
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* Physical DRAM offset.
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*/
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#define PLAT_PHYS_OFFSET UL(0x00000000)
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#ifndef __ASSEMBLY__
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#if defined(CONFIG_ARCH_IOP13XX)
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#define IOP13XX_PMMR_V_START (IOP13XX_PMMR_VIRT_MEM_BASE)
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#define IOP13XX_PMMR_V_END (IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_SIZE)
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#define IOP13XX_PMMR_P_START (IOP13XX_PMMR_PHYS_MEM_BASE)
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#define IOP13XX_PMMR_P_END (IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_SIZE)
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static inline dma_addr_t __virt_to_lbus(unsigned long x)
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{
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return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE;
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}
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static inline unsigned long __lbus_to_virt(dma_addr_t x)
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{
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return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE;
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}
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#define __is_lbus_dma(a) \
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((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END)
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#define __is_lbus_virt(a) \
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((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END)
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/* Device is an lbus device if it is on the platform bus of the IOP13XX */
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#define is_lbus_device(dev) \
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(dev && strncmp(dev->bus->name, "platform", 8) == 0)
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#define __arch_dma_to_virt(dev, addr) \
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({ \
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unsigned long __virt; \
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dma_addr_t __dma = addr; \
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if (is_lbus_device(dev) && __is_lbus_dma(__dma)) \
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__virt = __lbus_to_virt(__dma); \
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else \
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__virt = __phys_to_virt(__dma); \
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(void *)__virt; \
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})
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#define __arch_virt_to_dma(dev, addr) \
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({ \
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unsigned long __virt = (unsigned long)addr; \
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dma_addr_t __dma; \
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if (is_lbus_device(dev) && __is_lbus_virt(__virt)) \
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__dma = __virt_to_lbus(__virt); \
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else \
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__dma = __virt_to_phys(__virt); \
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__dma; \
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})
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#define __arch_pfn_to_dma(dev, pfn) \
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({ \
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/* __is_lbus_virt() can never be true for RAM pages */ \
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(dma_addr_t)__pfn_to_phys(pfn); \
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})
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#define __arch_dma_to_pfn(dev, addr) __phys_to_pfn(addr)
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#endif /* CONFIG_ARCH_IOP13XX */
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#endif /* !ASSEMBLY */
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#endif
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