| /* 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 (0xc0000000UL) |
| |
| /* |
| * 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 |
| |
| #define NODES_SHIFT 4 /* Up to 16 nodes */ |
| |
| /* |
| * 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, ADDR_TO_MAPBASE finds the owning node of the memory |
| * and return the mem_map of that node. |
| */ |
| # define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr)) |
| |
| /* |
| * Given a page frame number, find the owning node of the memory |
| * and return the mem_map of that node. |
| */ |
| # define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn)) |
| |
| /* |
| * 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 |