1/*
2 * arch/arm/mach-ks8695/include/mach/memory.h
3 *
4 * Copyright (C) 2006 Andrew Victor
5 *
6 * KS8695 Memory definitions
7 *
8 * This file is licensed under  the terms of the GNU General Public
9 * License version 2. This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
11 */
12
13#ifndef __ASM_ARCH_MEMORY_H
14#define __ASM_ARCH_MEMORY_H
15
16#include <mach/hardware.h>
17
18#ifndef __ASSEMBLY__
19
20#ifdef CONFIG_PCI
21
22/* PCI mappings */
23#define __virt_to_bus(x)	((x) - PAGE_OFFSET + KS8695_PCIMEM_PA)
24#define __bus_to_virt(x)	((x) - KS8695_PCIMEM_PA + PAGE_OFFSET)
25
26/* Platform-bus mapping */
27extern struct bus_type platform_bus_type;
28#define is_lbus_device(dev)		(dev && dev->bus == &platform_bus_type)
29#define __arch_dma_to_virt(dev, x)	({ (void *) (is_lbus_device(dev) ? \
30					__phys_to_virt(x) : __bus_to_virt(x)); })
31#define __arch_virt_to_dma(dev, x)	({ is_lbus_device(dev) ? \
32					(dma_addr_t)__virt_to_phys((unsigned long)x) \
33					: (dma_addr_t)__virt_to_bus(x); })
34#define __arch_pfn_to_dma(dev, pfn)	\
35	({ dma_addr_t __dma = __pfn_to_phys(pfn); \
36	   if (!is_lbus_device(dev)) \
37		__dma = __dma - PHYS_OFFSET + KS8695_PCIMEM_PA; \
38	   __dma; })
39
40#define __arch_dma_to_pfn(dev, x)	\
41	({ dma_addr_t __dma = x;				\
42	   if (!is_lbus_device(dev))				\
43		__dma += PHYS_OFFSET - KS8695_PCIMEM_PA;	\
44	   __phys_to_pfn(__dma);				\
45	})
46
47#endif
48
49#endif
50
51#endif
52