| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * linux/include/asm-arm/arch-ixp2000/memory.h |
| 3 | * |
| 4 | * Copyright (c) 2002 Intel Corp. |
| 5 | * Copyright (c) 2003-2004 MontaVista Software, Inc. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by the |
| 9 | * Free Software Foundation; either version 2 of the License, or (at your |
| 10 | * option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #ifndef __ASM_ARCH_MEMORY_H |
| 14 | #define __ASM_ARCH_MEMORY_H |
| 15 | |
| 16 | #define PHYS_OFFSET (0x00000000UL) |
| 17 | |
| 18 | /* |
| 19 | * Virtual view <-> DMA view memory address translations |
| 20 | * virt_to_bus: Used to translate the virtual address to an |
| 21 | * address suitable to be passed to set_dma_addr |
| 22 | * bus_to_virt: Used to convert an address for DMA operations |
| 23 | * to an address that the kernel can use. |
| 24 | */ |
| 25 | #include <asm/arch/ixp2000-regs.h> |
| 26 | |
| 27 | #define __virt_to_bus(v) \ |
| 28 | (((__virt_to_phys(v) - 0x0) + (*IXP2000_PCI_SDRAM_BAR & 0xfffffff0))) |
| 29 | |
| 30 | #define __bus_to_virt(b) \ |
| 31 | __phys_to_virt((((b - (*IXP2000_PCI_SDRAM_BAR & 0xfffffff0)) + 0x0))) |
| 32 | |
| 33 | #endif |
| 34 | |