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   1 /*
   2  * include/asm-arm/arch-ks8695/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 <asm/hardware.h>
  17
  18 /*
  19  * Physical SRAM offset.
  20  */
  21 #define PHYS_OFFSET             KS8695_SDRAM_PA
  22
  23 #ifndef __ASSEMBLY__
  24
  25 #ifdef CONFIG_PCI
  26
  27 /* PCI mappings */
  28 #define __virt_to_bus(x)        ((x) - PAGE_OFFSET + KS8695_PCIMEM_PA)
  29 #define __bus_to_virt(x)        ((x) - KS8695_PCIMEM_PA + PAGE_OFFSET)
  30
  31 /* Platform-bus mapping */
  32 extern struct bus_type platform_bus_type;
  33 #define is_lbus_device(dev)             (dev && dev->bus == &platform_bus_type)
  34 #define __arch_dma_to_virt(dev, x)      ({ is_lbus_device(dev) ? \
  35                                         __phys_to_virt(x) : __bus_to_virt(x); })
  36 #define __arch_virt_to_dma(dev, x)      ({ is_lbus_device(dev) ? \
  37                                         (dma_addr_t)__virt_to_phys(x) : (dma_addr_t)__virt_to_bus(x); })
  38 #define __arch_page_to_dma(dev, x)      __arch_virt_to_dma(dev, page_address(x))
  39
  40 #else
  41
  42 #define __virt_to_bus(x)        __virt_to_phys(x)
  43 #define __bus_to_virt(x)        __phys_to_virt(x)
  44
  45 #endif
  46
  47 #endif
  48
  49 #endif