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/*
* arch/arm/mach-realview/include/mach/memory.h
*
* Copyright (C) 2003 ARM Limited
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __ASM_ARCH_MEMORY_H
#define __ASM_ARCH_MEMORY_H
/*
* Physical DRAM offset.
*/
#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
#define PLAT_PHYS_OFFSET UL(0x70000000)
#else
#define PLAT_PHYS_OFFSET UL(0x00000000)
#endif
#ifdef CONFIG_ZONE_DMA
#define ARM_DMA_ZONE_SIZE SZ_256M
#endif
#ifdef CONFIG_SPARSEMEM
/*
* Sparsemem definitions for RealView PBX.
*
* The RealView PBX board has another block of 512MB of RAM at 0x20000000,
* however only the block at 0x70000000 (or the 256MB mirror at 0x00000000)
* may be used for DMA.
*
* The macros below define a section size of 256MB and a non-linear virtual to
* physical mapping:
*
* 256MB @ 0x00000000 -> PAGE_OFFSET
* 512MB @ 0x20000000 -> PAGE_OFFSET + 0x10000000
* 256MB @ 0x80000000 -> PAGE_OFFSET + 0x30000000
*/
#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
#error "SPARSEMEM not available with REALVIEW_HIGH_PHYS_OFFSET"
#endif
#define MAX_PHYSMEM_BITS 32
#define SECTION_SIZE_BITS 28
/* bank page offsets */
#define PAGE_OFFSET1 (PAGE_OFFSET + 0x10000000)
#define PAGE_OFFSET2 (PAGE_OFFSET + 0x30000000)
#define __phys_to_virt(phys) \
((phys) >= 0x80000000 ? (phys) - 0x80000000 + PAGE_OFFSET2 : \
(phys) >= 0x20000000 ? (phys) - 0x20000000 + PAGE_OFFSET1 : \
(phys) + PAGE_OFFSET)
#define __virt_to_phys(virt) \
((virt) >= PAGE_OFFSET2 ? (virt) - PAGE_OFFSET2 + 0x80000000 : \
(virt) >= PAGE_OFFSET1 ? (virt) - PAGE_OFFSET1 + 0x20000000 : \
(virt) - PAGE_OFFSET)
#endif /* CONFIG_SPARSEMEM */
#endif
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