1/* 2 * linux/include/asm-arm/arch-sa1100/memory.h 3 * 4 * Copyright (C) 1999-2000 Nicolas Pitre <nico@cam.org> 5 */ 6 7#ifndef __ASM_ARCH_MEMORY_H 8#define __ASM_ARCH_MEMORY_H 9 10#include <asm/sizes.h> 11 12/* 13 * Physical DRAM offset is 0xc0000000 on the SA1100 14 */ 15#define PHYS_OFFSET UL(0xc0000000) 16 17#ifndef __ASSEMBLY__ 18 19#ifdef CONFIG_SA1111 20void sa1111_adjust_zones(int node, unsigned long *size, unsigned long *holes); 21 22#define arch_adjust_zones(node, size, holes) \ 23 sa1111_adjust_zones(node, size, holes) 24 25#define ISA_DMA_THRESHOLD (PHYS_OFFSET + SZ_1M - 1) 26 27#endif 28#endif 29 30/* 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. 36 * 37 * On the SA1100, bus addresses are equivalent to physical addresses. 38 */ 39#define __virt_to_bus(x) __virt_to_phys(x) 40#define __bus_to_virt(x) __phys_to_virt(x) 41 42/* 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. 47 * 48 * Of course, all this isn't mandatory for SA1100 implementations with only 49 * one used memory bank. For those, simply undefine CONFIG_DISCONTIGMEM. 50 * 51 * The nodes are matched with the physical memory bank addresses which are 52 * incidentally the same as virtual addresses. 53 * 54 * node 0: 0xc0000000 - 0xc7ffffff 55 * node 1: 0xc8000000 - 0xcfffffff 56 * node 2: 0xd0000000 - 0xd7ffffff 57 * node 3: 0xd8000000 - 0xdfffffff 58 */ 59#define NODE_MEM_SIZE_BITS 27 60 61/* 62 * Cache flushing area - SA1100 zero bank 63 */ 64#define FLUSH_BASE_PHYS 0xe0000000 65#define FLUSH_BASE 0xf5000000 66#define FLUSH_BASE_MINICACHE 0xf5100000 67 68#endif 69