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-omap/memory.h
3 *
4 * Memory map for OMAP-1510 and 1610
5 *
6 * Copyright (C) 2000 RidgeRun, Inc.
7 * Author: Greg Lonnon <glonnon@ridgerun.com>
8 *
9 * This file was derived from linux/include/asm-arm/arch-intergrator/memory.h
10 * Copyright (C) 1999 ARM Limited
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
20 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * You should have received a copy of the GNU General Public License along
29 * with this program; if not, write to the Free Software Foundation, Inc.,
30 * 675 Mass Ave, Cambridge, MA 02139, USA.
31 */
32
33#ifndef __ASM_ARCH_MEMORY_H
34#define __ASM_ARCH_MEMORY_H
35
36/*
37 * Physical DRAM offset.
38 */
39#define PHYS_OFFSET (0x10000000UL)
40
41/*
42 * OMAP-1510 Local Bus address offset
43 */
44#define OMAP1510_LB_OFFSET (0x30000000UL)
45
46/*
47 * Conversion between SDRAM and fake PCI bus, used by USB
48 * NOTE: Physical address must be converted to Local Bus address
49 * on OMAP-1510 only
50 */
51
52/*
53 * Bus address is physical address, except for OMAP-1510 Local Bus.
54 */
55#define __virt_to_bus(x) __virt_to_phys(x)
56#define __bus_to_virt(x) __phys_to_virt(x)
57
58/*
59 * OMAP-1510 bus address is translated into a Local Bus address if the
60 * OMAP bus type is lbus. We do the address translation based on the
61 * device overriding the defaults used in the dma-mapping API.
62 * Note that the is_lbus_device() test is not very efficient on 1510
63 * because of the strncmp().
64 */
65#ifdef CONFIG_ARCH_OMAP1510
66
67#define virt_to_lbus(x) ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET)
68#define lbus_to_virt(x) ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET)
69#define is_lbus_device(dev) (cpu_is_omap1510() && dev && (strncmp(dev->bus_id, "ohci", 4) == 0))
70
71#define __arch_page_to_dma(dev, page) ({is_lbus_device(dev) ? \
72 (dma_addr_t)virt_to_lbus(page_address(page)) : \
73 (dma_addr_t)__virt_to_bus(page_address(page));})
74
75#define __arch_dma_to_virt(dev, addr) ({is_lbus_device(dev) ? \
76 lbus_to_virt(addr) : \
77 __bus_to_virt(addr);})
78
79#define __arch_virt_to_dma(dev, addr) ({is_lbus_device(dev) ? \
80 virt_to_lbus(addr) : \
81 __virt_to_bus(addr);})
82
83#endif /* CONFIG_ARCH_OMAP1510 */
84
85#define PHYS_TO_NID(addr) (0)
86#endif
87