1#ifndef __ASM_ARCH_MEMORY_H
2#define __ASM_ARCH_MEMORY_H
3
4#include <mach/hardware.h>
5
6#ifndef __ASSEMBLY__
7
8#if defined(CONFIG_ARCH_IOP13XX)
9#define IOP13XX_PMMR_V_START (IOP13XX_PMMR_VIRT_MEM_BASE)
10#define IOP13XX_PMMR_V_END   (IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_SIZE)
11#define IOP13XX_PMMR_P_START (IOP13XX_PMMR_PHYS_MEM_BASE)
12#define IOP13XX_PMMR_P_END   (IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_SIZE)
13
14static inline dma_addr_t __virt_to_lbus(void __iomem *x)
15{
16	return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE;
17}
18
19static inline void __iomem *__lbus_to_virt(dma_addr_t x)
20{
21	return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE;
22}
23
24#define __is_lbus_dma(a)				\
25	((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END)
26
27#define __is_lbus_virt(a)				\
28	((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END)
29
30/* Device is an lbus device if it is on the platform bus of the IOP13XX */
31#define is_lbus_device(dev) 				\
32	(dev && strncmp(dev->bus->name, "platform", 8) == 0)
33
34#define __arch_dma_to_virt(dev, addr)					\
35	({								\
36		void * __virt;						\
37		dma_addr_t __dma = addr;				\
38		if (is_lbus_device(dev) && __is_lbus_dma(__dma))	\
39			__virt = __lbus_to_virt(__dma);			\
40		else							\
41			__virt = (void *)__phys_to_virt(__dma);		\
42		__virt;							\
43	})
44
45#define __arch_virt_to_dma(dev, addr)					\
46	({								\
47		void * __virt = addr;					\
48		dma_addr_t __dma;					\
49		if (is_lbus_device(dev) && __is_lbus_virt(__virt))	\
50			__dma = __virt_to_lbus(__virt);			\
51		else							\
52			__dma = __virt_to_phys((unsigned long)__virt);	\
53		__dma;							\
54	})
55
56#define __arch_pfn_to_dma(dev, pfn)					\
57	({								\
58		/* __is_lbus_virt() can never be true for RAM pages */	\
59		(dma_addr_t)__pfn_to_phys(pfn);				\
60	})
61
62#define __arch_dma_to_pfn(dev, addr)	__phys_to_pfn(addr)
63
64#endif /* CONFIG_ARCH_IOP13XX */
65#endif /* !ASSEMBLY */
66
67#endif
68