77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
|
/*
|
||
|
|
* linux/include/asm-arm/arch-pxa/memory.h
|
||
|
|
*
|
||
|
|
* Author: Nicolas Pitre
|
||
|
|
* Copyright: (C) 2001 MontaVista Software Inc.
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ASM_ARCH_MEMORY_H
|
||
|
|
#define __ASM_ARCH_MEMORY_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Physical DRAM offset.
|
||
|
|
*/
|
||
|
|
#define PHYS_OFFSET (0xa0000000UL)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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
|
||
|
|
/*
|
||
|
|
* The nodes are matched with the physical SDRAM banks as follows:
|
||
|
|
*
|
||
|
|
* node 0: 0xa0000000-0xa3ffffff --> 0xc0000000-0xc3ffffff
|
||
|
|
* node 1: 0xa4000000-0xa7ffffff --> 0xc4000000-0xc7ffffff
|
||
|
|
* node 2: 0xa8000000-0xabffffff --> 0xc8000000-0xcbffffff
|
||
|
|
* node 3: 0xac000000-0xafffffff --> 0xcc000000-0xcfffffff
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Given a kernel address, find the home node of the underlying memory.
|
||
|
|
*/
|
||
|
|
#define KVADDR_TO_NID(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> 26)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Given a page frame number, convert it to a node id.
|
||
|
|
*/
|
||
|
|
#define PFN_TO_NID(pfn) (((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
|
||
|
|
* and returns 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 returns 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.
|
||
|
|
*/
|
||
|
|
#define LOCAL_MAP_NR(addr) \
|
||
|
|
(((unsigned long)(addr) & 0x03ffffff) >> PAGE_SHIFT)
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define PFN_TO_NID(addr) (0)
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|