diff options
author | Ben Dooks <ben-linux@fluff.org> | 2008-08-08 21:10:12 +0100 |
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committer | Ben Dooks <ben-linux@fluff.org> | 2008-08-08 21:10:12 +0100 |
commit | af7a535688a758d15f06a98833e6a143b29af9de (patch) | |
tree | bac5ab210bbbbe276f0e44ed84194d7c8bb16aae /arch/arm/mach-lh7a40x/include/mach/memory.h | |
parent | 0c17e4ceedd35c78b1c7413dbd16279a350be6bc (diff) | |
parent | c41107c2d4fd31924533f4dbc4c3428acc2b5894 (diff) |
Merge http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm into for-rmk
Diffstat (limited to 'arch/arm/mach-lh7a40x/include/mach/memory.h')
-rw-r--r-- | arch/arm/mach-lh7a40x/include/mach/memory.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/arm/mach-lh7a40x/include/mach/memory.h b/arch/arm/mach-lh7a40x/include/mach/memory.h new file mode 100644 index 00000000000..f7107b4c197 --- /dev/null +++ b/arch/arm/mach-lh7a40x/include/mach/memory.h @@ -0,0 +1,76 @@ +/* arch/arm/mach-lh7a40x/include/mach/memory.h + * + * Copyright (C) 2004 Coastal Environmental Systems + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * + * Refer to <file:Documentation/arm/Sharp-LH/SDRAM> for more information. + * + */ + +#ifndef __ASM_ARCH_MEMORY_H +#define __ASM_ARCH_MEMORY_H + +/* + * Physical DRAM offset. + */ +#define PHYS_OFFSET UL(0xc0000000) + +/* + * Virtual view <-> DMA view memory address translations + * virt_to_bus: Used to translate the virtual address to an + * address suitable to be passed to set_dma_addr + * bus_to_virt: Used to convert an address for DMA operations + * to an address that the kernel can use. + */ +#define __virt_to_bus(x) __virt_to_phys(x) +#define __bus_to_virt(x) __phys_to_virt(x) + +#ifdef CONFIG_DISCONTIGMEM + +/* + * Given a kernel address, find the home node of the underlying memory. + */ + +# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE +# define KVADDR_TO_NID(addr) \ + ( ((((unsigned long) (addr) - PAGE_OFFSET) >> 24) & 1)\ + | ((((unsigned long) (addr) - PAGE_OFFSET) >> 25) & ~1)) +# else /* 2 banks per node */ +# define KVADDR_TO_NID(addr) \ + (((unsigned long) (addr) - PAGE_OFFSET) >> 26) +# endif + +/* + * Given a page frame number, convert it to a node id. + */ + +# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE +# define PFN_TO_NID(pfn) \ + (((((pfn) - PHYS_PFN_OFFSET) >> (24 - PAGE_SHIFT)) & 1)\ + | ((((pfn) - PHYS_PFN_OFFSET) >> (25 - PAGE_SHIFT)) & ~1)) +# else /* 2 banks per node */ +# define PFN_TO_NID(pfn) \ + (((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT)) +#endif + +/* + * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory + * and returns the index corresponding to the appropriate page in the + * node's mem_map. + */ + +# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE +# define LOCAL_MAP_NR(addr) \ + (((unsigned long)(addr) & 0x003fffff) >> PAGE_SHIFT) +# else /* 2 banks per node */ +# define LOCAL_MAP_NR(addr) \ + (((unsigned long)(addr) & 0x01ffffff) >> PAGE_SHIFT) +# endif + +#endif + +#endif |