Linux 2.6.20.13
[linux/fpc-iii.git] / include / asm-arm / arch-sa1100 / memory.h
blob0e907fc6d42a5694c27905de849b092ed783f3eb
1 /*
2 * linux/include/asm-arm/arch-sa1100/memory.h
4 * Copyright (C) 1999-2000 Nicolas Pitre <nico@cam.org>
5 */
7 #ifndef __ASM_ARCH_MEMORY_H
8 #define __ASM_ARCH_MEMORY_H
10 #include <asm/sizes.h>
13 * Physical DRAM offset is 0xc0000000 on the SA1100
15 #define PHYS_OFFSET UL(0xc0000000)
17 #ifndef __ASSEMBLY__
19 #ifdef CONFIG_SA1111
20 void sa1111_adjust_zones(int node, unsigned long *size, unsigned long *holes);
22 #define arch_adjust_zones(node, size, holes) \
23 sa1111_adjust_zones(node, size, holes)
25 #define ISA_DMA_THRESHOLD (PHYS_OFFSET + SZ_1M - 1)
27 #endif
28 #endif
31 * Virtual view <-> DMA view memory address translations
32 * virt_to_bus: Used to translate the virtual address to an
33 * address suitable to be passed to set_dma_addr
34 * bus_to_virt: Used to convert an address for DMA operations
35 * to an address that the kernel can use.
37 * On the SA1100, bus addresses are equivalent to physical addresses.
39 #define __virt_to_bus(x) __virt_to_phys(x)
40 #define __bus_to_virt(x) __phys_to_virt(x)
43 * Because of the wide memory address space between physical RAM banks on the
44 * SA1100, it's much convenient to use Linux's NUMA support to implement our
45 * memory map representation. Assuming all memory nodes have equal access
46 * characteristics, we then have generic discontiguous memory support.
48 * Of course, all this isn't mandatory for SA1100 implementations with only
49 * one used memory bank. For those, simply undefine CONFIG_DISCONTIGMEM.
51 * The nodes are matched with the physical memory bank addresses which are
52 * incidentally the same as virtual addresses.
54 * node 0: 0xc0000000 - 0xc7ffffff
55 * node 1: 0xc8000000 - 0xcfffffff
56 * node 2: 0xd0000000 - 0xd7ffffff
57 * node 3: 0xd8000000 - 0xdfffffff
59 #define NODE_MEM_SIZE_BITS 27
62 * Cache flushing area - SA1100 zero bank
64 #define FLUSH_BASE_PHYS 0xe0000000
65 #define FLUSH_BASE 0xf5000000
66 #define FLUSH_BASE_MINICACHE 0xf5100000
68 #endif