Merge branch 'next/fixes' into next/cleanup
[pandora-kernel.git] / arch / arm / mach-omap1 / include / mach / memory.h
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 /*
9  * Physical DRAM offset.
10  */
11 #define PLAT_PHYS_OFFSET                UL(0x10000000)
12
13 /*
14  * Bus address is physical address, except for OMAP-1510 Local Bus.
15  * OMAP-1510 bus address is translated into a Local Bus address if the
16  * OMAP bus type is lbus. We do the address translation based on the
17  * device overriding the defaults used in the dma-mapping API.
18  * Note that the is_lbus_device() test is not very efficient on 1510
19  * because of the strncmp().
20  */
21 #ifdef CONFIG_ARCH_OMAP15XX
22
23 /*
24  * OMAP-1510 Local Bus address offset
25  */
26 #define OMAP1510_LB_OFFSET      UL(0x30000000)
27
28 #define virt_to_lbus(x)         ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET)
29 #define lbus_to_virt(x)         ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET)
30 #define is_lbus_device(dev)     (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0))
31
32 #define __arch_pfn_to_dma(dev, pfn)     \
33         ({ dma_addr_t __dma = __pfn_to_phys(pfn); \
34            if (is_lbus_device(dev)) \
35                 __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \
36            __dma; })
37
38 #define __arch_dma_to_pfn(dev, addr)    \
39         ({ dma_addr_t __dma = addr;                             \
40            if (is_lbus_device(dev))                             \
41                 __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET;      \
42            __phys_to_pfn(__dma);                                \
43         })
44
45 #define __arch_dma_to_virt(dev, addr)   ({ (void *) (is_lbus_device(dev) ? \
46                                                 lbus_to_virt(addr) : \
47                                                 __phys_to_virt(addr)); })
48
49 #define __arch_virt_to_dma(dev, addr)   ({ unsigned long __addr = (unsigned long)(addr); \
50                                            (dma_addr_t) (is_lbus_device(dev) ? \
51                                                 virt_to_lbus(__addr) : \
52                                                 __virt_to_phys(__addr)); })
53
54 #endif  /* CONFIG_ARCH_OMAP15XX */
55
56 #endif