Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * linux/include/asm-arm/arch-integrator/memory.h
3 *
4 * Copyright (C) 1999 ARM Limited
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20#ifndef __ASM_ARCH_MEMORY_H
21#define __ASM_ARCH_MEMORY_H
22
23/*
24 * Physical DRAM offset.
25 */
26#define PHYS_OFFSET UL(0x00000000)
27#define BUS_OFFSET UL(0x80000000)
28
29/*
30 * Virtual view <-> DMA view memory address translations
31 * virt_to_bus: Used to translate the virtual address to an
32 * address suitable to be passed to set_dma_addr
33 * bus_to_virt: Used to convert an address for DMA operations
34 * to an address that the kernel can use.
35 */
36#define __virt_to_bus(x) (x - PAGE_OFFSET + BUS_OFFSET)
37#define __bus_to_virt(x) (x - BUS_OFFSET + PAGE_OFFSET)
38
39#endif