tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 UL(0x00000000)
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