82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/*
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* arch/arm/mach-realview/include/mach/memory.h
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*
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* Copyright (C) 2003 ARM Limited
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __ASM_ARCH_MEMORY_H
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#define __ASM_ARCH_MEMORY_H
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/*
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* Physical DRAM offset.
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*/
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#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
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#define PHYS_OFFSET UL(0x70000000)
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#else
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#define PHYS_OFFSET UL(0x00000000)
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#endif
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#if !defined(__ASSEMBLY__) && defined(CONFIG_ZONE_DMA)
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extern void realview_adjust_zones(int node, unsigned long *size,
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unsigned long *hole);
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#define arch_adjust_zones(node, size, hole) \
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realview_adjust_zones(node, size, hole)
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#define ISA_DMA_THRESHOLD (PHYS_OFFSET + SZ_256M - 1)
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#define MAX_DMA_ADDRESS (PAGE_OFFSET + SZ_256M)
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#endif
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#ifdef CONFIG_SPARSEMEM
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/*
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* Sparsemem definitions for RealView PBX.
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*
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* The RealView PBX board has another block of 512MB of RAM at 0x20000000,
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* however only the block at 0x70000000 (or the 256MB mirror at 0x00000000)
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* may be used for DMA.
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*
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* The macros below define a section size of 256MB and a non-linear virtual to
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* physical mapping:
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*
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* 256MB @ 0x00000000 -> PAGE_OFFSET
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* 512MB @ 0x20000000 -> PAGE_OFFSET + 0x10000000
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* 256MB @ 0x80000000 -> PAGE_OFFSET + 0x30000000
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*/
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#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
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#error "SPARSEMEM not available with REALVIEW_HIGH_PHYS_OFFSET"
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#endif
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#define MAX_PHYSMEM_BITS 32
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#define SECTION_SIZE_BITS 28
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/* bank page offsets */
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#define PAGE_OFFSET1 (PAGE_OFFSET + 0x10000000)
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#define PAGE_OFFSET2 (PAGE_OFFSET + 0x30000000)
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#define __phys_to_virt(phys) \
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((phys) >= 0x80000000 ? (phys) - 0x80000000 + PAGE_OFFSET2 : \
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(phys) >= 0x20000000 ? (phys) - 0x20000000 + PAGE_OFFSET1 : \
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(phys) + PAGE_OFFSET)
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#define __virt_to_phys(virt) \
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((virt) >= PAGE_OFFSET2 ? (virt) - PAGE_OFFSET2 + 0x80000000 : \
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(virt) >= PAGE_OFFSET1 ? (virt) - PAGE_OFFSET1 + 0x20000000 : \
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(virt) - PAGE_OFFSET)
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#endif /* CONFIG_SPARSEMEM */
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#endif
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