Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 <linux/config.h> |
| 11 | #include <asm/sizes.h> |
| 12 | |
| 13 | /* |
| 14 | * Physical DRAM offset is 0xc0000000 on the SA1100 |
| 15 | */ |
Nicolas Pitre | f09b997 | 2005-10-29 21:44:55 +0100 | [diff] [blame] | 16 | #define PHYS_OFFSET UL(0xc0000000) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
| 18 | #ifndef __ASSEMBLY__ |
| 19 | |
| 20 | #ifdef CONFIG_SA1111 |
Russell King | 1b12050 | 2005-11-16 17:38:40 +0000 | [diff] [blame] | 21 | void sa1111_adjust_zones(int node, unsigned long *size, unsigned long *holes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | #define arch_adjust_zones(node, size, holes) \ |
Russell King | 1b12050 | 2005-11-16 17:38:40 +0000 | [diff] [blame] | 24 | sa1111_adjust_zones(node, size, holes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
| 26 | #define ISA_DMA_THRESHOLD (PHYS_OFFSET + SZ_1M - 1) |
| 27 | |
| 28 | #endif |
| 29 | #endif |
| 30 | |
| 31 | /* |
| 32 | * Virtual view <-> DMA view memory address translations |
| 33 | * virt_to_bus: Used to translate the virtual address to an |
| 34 | * address suitable to be passed to set_dma_addr |
| 35 | * bus_to_virt: Used to convert an address for DMA operations |
| 36 | * to an address that the kernel can use. |
| 37 | * |
| 38 | * On the SA1100, bus addresses are equivalent to physical addresses. |
| 39 | */ |
| 40 | #define __virt_to_bus(x) __virt_to_phys(x) |
| 41 | #define __bus_to_virt(x) __phys_to_virt(x) |
| 42 | |
| 43 | #ifdef CONFIG_DISCONTIGMEM |
| 44 | /* |
| 45 | * Because of the wide memory address space between physical RAM banks on the |
| 46 | * SA1100, it's much convenient to use Linux's NUMA support to implement our |
| 47 | * memory map representation. Assuming all memory nodes have equal access |
| 48 | * characteristics, we then have generic discontiguous memory support. |
| 49 | * |
| 50 | * Of course, all this isn't mandatory for SA1100 implementations with only |
| 51 | * one used memory bank. For those, simply undefine CONFIG_DISCONTIGMEM. |
| 52 | * |
| 53 | * The nodes are matched with the physical memory bank addresses which are |
| 54 | * incidentally the same as virtual addresses. |
| 55 | * |
| 56 | * node 0: 0xc0000000 - 0xc7ffffff |
| 57 | * node 1: 0xc8000000 - 0xcfffffff |
| 58 | * node 2: 0xd0000000 - 0xd7ffffff |
| 59 | * node 3: 0xd8000000 - 0xdfffffff |
| 60 | */ |
| 61 | |
| 62 | /* |
| 63 | * Given a kernel address, find the home node of the underlying memory. |
| 64 | */ |
| 65 | #define KVADDR_TO_NID(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> 27) |
| 66 | |
| 67 | /* |
| 68 | * Given a page frame number, convert it to a node id. |
| 69 | */ |
| 70 | #define PFN_TO_NID(pfn) (((pfn) - PHYS_PFN_OFFSET) >> (27 - PAGE_SHIFT)) |
| 71 | |
| 72 | /* |
| 73 | * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory |
| 74 | * and return the mem_map of that node. |
| 75 | */ |
| 76 | #define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr)) |
| 77 | |
| 78 | /* |
| 79 | * Given a page frame number, find the owning node of the memory |
| 80 | * and return the mem_map of that node. |
| 81 | */ |
| 82 | #define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn)) |
| 83 | |
| 84 | /* |
| 85 | * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory |
| 86 | * and returns the index corresponding to the appropriate page in the |
| 87 | * node's mem_map. |
| 88 | */ |
| 89 | #define LOCAL_MAP_NR(addr) \ |
| 90 | (((unsigned long)(addr) & 0x07ffffff) >> PAGE_SHIFT) |
| 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | #endif |
| 93 | |
Russell King | 74d02fb | 2006-04-04 21:47:43 +0100 | [diff] [blame] | 94 | /* |
| 95 | * Cache flushing area - SA1100 zero bank |
| 96 | */ |
| 97 | #define FLUSH_BASE_PHYS 0xe0000000 |
| 98 | #define FLUSH_BASE 0xf5000000 |
| 99 | #define FLUSH_BASE_MINICACHE 0xf5100000 |
| 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | #endif |