| Bellido Nicolas | 038c5b6 | 2005-06-20 18:51:05 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * linux/include/asm-arm/arch-aaec2000/memory.h |
| 3 | * |
| 4 | * Copyright (c) 2005 Nicolas Bellido Y Ortega |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #ifndef __ASM_ARCH_MEMORY_H |
| 12 | #define __ASM_ARCH_MEMORY_H |
| 13 | |
| 14 | #include <linux/config.h> |
| 15 | |
| 16 | #define PHYS_OFFSET (0xf0000000UL) |
| 17 | |
| 18 | #define __virt_to_bus(x) __virt_to_phys(x) |
| 19 | #define __bus_to_virt(x) __phys_to_virt(x) |
| 20 | |
| 21 | #ifdef CONFIG_DISCONTIGMEM |
| 22 | |
| 23 | /* |
| 24 | * The nodes are the followings: |
| 25 | * |
| 26 | * node 0: 0xf000.0000 - 0xf3ff.ffff |
| 27 | * node 1: 0xf400.0000 - 0xf7ff.ffff |
| 28 | * node 2: 0xf800.0000 - 0xfbff.ffff |
| 29 | * node 3: 0xfc00.0000 - 0xffff.ffff |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * Given a kernel address, find the home node of the underlying memory. |
| 34 | */ |
| 35 | #define KVADDR_TO_NID(addr) \ |
| 36 | (((unsigned long)(addr) - PAGE_OFFSET) >> NODE_MAX_MEM_SHIFT) |
| 37 | |
| 38 | /* |
| 39 | * Given a page frame number, convert it to a node id. |
| 40 | */ |
| 41 | #define PFN_TO_NID(pfn) \ |
| 42 | (((pfn) - PHYS_PFN_OFFSET) >> (NODE_MAX_MEM_SHIFT - PAGE_SHIFT)) |
| 43 | |
| 44 | /* |
| 45 | * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory |
| 46 | * and return the mem_map of that node. |
| 47 | */ |
| 48 | #define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr)) |
| 49 | |
| 50 | /* |
| 51 | * Given a page frame number, find the owning node of the memory |
| 52 | * and return the mem_map of that node. |
| 53 | */ |
| 54 | #define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn)) |
| 55 | |
| 56 | /* |
| 57 | * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory |
| 58 | * and returns the index corresponding to the appropriate page in the |
| 59 | * node's mem_map. |
| 60 | */ |
| 61 | #define LOCAL_MAP_NR(addr) \ |
| 62 | (((unsigned long)(addr) & (NODE_MAX_MEM_SIZE - 1)) >> PAGE_SHIFT) |
| 63 | |
| 64 | #define NODE_MAX_MEM_SHIFT 26 |
| 65 | #define NODE_MAX_MEM_SIZE (1 << NODE_MAX_MEM_SHIFT) |
| 66 | |
| 67 | #else |
| 68 | |
| 69 | #define PFN_TO_NID(addr) (0) |
| 70 | |
| 71 | #endif /* CONFIG_DISCONTIGMEM */ |
| 72 | |
| 73 | #endif /* __ASM_ARCH_MEMORY_H */ |