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#ifdef CONFIG_SPARSEMEM 24 25/* 26 * Sparsemem definitions for RealView PBX. 27 * 28 * The RealView PBX board has another block of 512MB of RAM at 0x20000000, 29 * however only the block at 0x70000000 (or the 256MB mirror at 0x00000000) 30 * may be used for DMA. 31 * 32 * The macros below define a section size of 256MB and a non-linear virtual to 33 * physical mapping: 34 * 35 * 256MB @ 0x00000000 -> PAGE_OFFSET 36 * 512MB @ 0x20000000 -> PAGE_OFFSET + 0x10000000 37 * 256MB @ 0x80000000 -> PAGE_OFFSET + 0x30000000 38 */ 39#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET 40#error "SPARSEMEM not available with REALVIEW_HIGH_PHYS_OFFSET" 41#endif 42 43#define MAX_PHYSMEM_BITS 32 44#define SECTION_SIZE_BITS 28 45 46/* bank page offsets */ 47#define PAGE_OFFSET1 (PAGE_OFFSET + 0x10000000) 48#define PAGE_OFFSET2 (PAGE_OFFSET + 0x30000000) 49 50#define PHYS_OFFSET PLAT_PHYS_OFFSET 51 52#define __phys_to_virt(phys) \ 53 ((phys) >= 0x80000000 ? (phys) - 0x80000000 + PAGE_OFFSET2 : \ 54 (phys) >= 0x20000000 ? (phys) - 0x20000000 + PAGE_OFFSET1 : \ 55 (phys) + PAGE_OFFSET) 56 57#define __virt_to_phys(virt) \ 58 ((virt) >= PAGE_OFFSET2 ? (virt) - PAGE_OFFSET2 + 0x80000000 : \ 59 (virt) >= PAGE_OFFSET1 ? (virt) - PAGE_OFFSET1 + 0x20000000 : \ 60 (virt) - PAGE_OFFSET) 61 62#endif /* CONFIG_SPARSEMEM */ 63 64#endif 65