Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-realview/include/mach/memory.h |
| 3 | * |
| 4 | * Copyright (C) 2003 ARM Limited |
| 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 as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #ifndef __ASM_ARCH_MEMORY_H |
| 21 | #define __ASM_ARCH_MEMORY_H |
| 22 | |
| 23 | /* |
| 24 | * Physical DRAM offset. |
| 25 | */ |
Catalin Marinas | 70bb62f | 2008-12-01 14:54:55 +0000 | [diff] [blame] | 26 | #ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET |
| 27 | #define PHYS_OFFSET UL(0x70000000) |
| 28 | #else |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 29 | #define PHYS_OFFSET UL(0x00000000) |
Catalin Marinas | 70bb62f | 2008-12-01 14:54:55 +0000 | [diff] [blame] | 30 | #endif |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 31 | |
Catalin Marinas | c97c5aa | 2009-11-04 12:19:05 +0000 | [diff] [blame] | 32 | #if !defined(__ASSEMBLY__) && defined(CONFIG_ZONE_DMA) |
| 33 | extern void realview_adjust_zones(int node, unsigned long *size, |
| 34 | unsigned long *hole); |
| 35 | #define arch_adjust_zones(node, size, hole) \ |
| 36 | realview_adjust_zones(node, size, hole) |
| 37 | |
| 38 | #define ISA_DMA_THRESHOLD (PHYS_OFFSET + SZ_256M - 1) |
| 39 | #define MAX_DMA_ADDRESS (PAGE_OFFSET + SZ_256M) |
| 40 | #endif |
| 41 | |
| 42 | #ifdef CONFIG_SPARSEMEM |
| 43 | |
| 44 | /* |
| 45 | * Sparsemem definitions for RealView PBX. |
| 46 | * |
| 47 | * The RealView PBX board has another block of 512MB of RAM at 0x20000000, |
| 48 | * however only the block at 0x70000000 (or the 256MB mirror at 0x00000000) |
| 49 | * may be used for DMA. |
| 50 | * |
| 51 | * The macros below define a section size of 256MB and a non-linear virtual to |
| 52 | * physical mapping: |
| 53 | * |
| 54 | * 256MB @ 0x00000000 -> PAGE_OFFSET |
| 55 | * 512MB @ 0x20000000 -> PAGE_OFFSET + 0x10000000 |
| 56 | * 256MB @ 0x80000000 -> PAGE_OFFSET + 0x30000000 |
| 57 | */ |
| 58 | #ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET |
| 59 | #error "SPARSEMEM not available with REALVIEW_HIGH_PHYS_OFFSET" |
| 60 | #endif |
| 61 | |
| 62 | #define MAX_PHYSMEM_BITS 32 |
| 63 | #define SECTION_SIZE_BITS 28 |
| 64 | |
| 65 | /* bank page offsets */ |
| 66 | #define PAGE_OFFSET1 (PAGE_OFFSET + 0x10000000) |
| 67 | #define PAGE_OFFSET2 (PAGE_OFFSET + 0x30000000) |
| 68 | |
| 69 | #define __phys_to_virt(phys) \ |
| 70 | ((phys) >= 0x80000000 ? (phys) - 0x80000000 + PAGE_OFFSET2 : \ |
| 71 | (phys) >= 0x20000000 ? (phys) - 0x20000000 + PAGE_OFFSET1 : \ |
| 72 | (phys) + PAGE_OFFSET) |
| 73 | |
| 74 | #define __virt_to_phys(virt) \ |
| 75 | ((virt) >= PAGE_OFFSET2 ? (virt) - PAGE_OFFSET2 + 0x80000000 : \ |
| 76 | (virt) >= PAGE_OFFSET1 ? (virt) - PAGE_OFFSET1 + 0x20000000 : \ |
| 77 | (virt) - PAGE_OFFSET) |
| 78 | |
| 79 | #endif /* CONFIG_SPARSEMEM */ |
| 80 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 81 | #endif |