1 /* 2 * arch/arm/mach-sa1100/include/mach/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 20 void 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 SparseMEM support to implement 45 * our memory map representation. Assuming all memory nodes have equal access 46 * characteristics, we then have generic discontiguous memory support. 47 * 48 * The sparsemem banks are matched with the physical memory bank addresses 49 * which are incidentally the same as virtual addresses. 50 * 51 * node 0: 0xc0000000 - 0xc7ffffff 52 * node 1: 0xc8000000 - 0xcfffffff 53 * node 2: 0xd0000000 - 0xd7ffffff 54 * node 3: 0xd8000000 - 0xdfffffff 55 */ 56 #define MAX_PHYSMEM_BITS 32 57 #define SECTION_SIZE_BITS 27 58 59 /* 60 * Cache flushing area - SA1100 zero bank 61 */ 62 #define FLUSH_BASE_PHYS 0xe0000000 63 #define FLUSH_BASE 0xf5000000 64 #define FLUSH_BASE_MINICACHE 0xf5100000 65 66 #endif 67