/* include/asm-arm/arch-lh7a40x/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