Lennert Buytenhek | c471307 | 2006-03-28 21:18:54 +0100 | [diff] [blame] | 1 | /* |
| 2 | * include/asm-arm/arch-ixp23xx/memory.h |
| 3 | * |
| 4 | * Copyright (c) 2003-2004 Intel Corp. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your |
| 9 | * option) any later version. |
| 10 | */ |
| 11 | |
| 12 | #ifndef __ASM_ARCH_MEMORY_H |
| 13 | #define __ASM_ARCH_MEMORY_H |
| 14 | |
| 15 | #include <asm/hardware.h> |
| 16 | |
| 17 | /* |
| 18 | * Physical DRAM offset. |
| 19 | */ |
| 20 | #define PHYS_OFFSET (0x00000000) |
| 21 | |
| 22 | |
| 23 | /* |
| 24 | * Virtual view <-> DMA view memory address translations |
| 25 | * virt_to_bus: Used to translate the virtual address to an |
| 26 | * address suitable to be passed to set_dma_addr |
| 27 | * bus_to_virt: Used to convert an address for DMA operations |
| 28 | * to an address that the kernel can use. |
| 29 | */ |
| 30 | #ifndef __ASSEMBLY__ |
| 31 | |
| 32 | #define __virt_to_bus(v) \ |
| 33 | ({ unsigned int ret; \ |
| 34 | ret = ((__virt_to_phys(v) - 0x00000000) + \ |
| 35 | (*((volatile int *)IXP23XX_PCI_SDRAM_BAR) & 0xfffffff0)); \ |
| 36 | ret; }) |
| 37 | |
| 38 | #define __bus_to_virt(b) \ |
| 39 | ({ unsigned int data; \ |
| 40 | data = *((volatile int *)IXP23XX_PCI_SDRAM_BAR); \ |
| 41 | __phys_to_virt((((b - (data & 0xfffffff0)) + 0x00000000))); }) |
| 42 | |
| 43 | #endif |
| 44 | |
| 45 | |
| 46 | #endif |