memory.h

来自「linux 内核源代码」· C头文件 代码 · 共 53 行

/*
 *  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	UL(0xa0000000)

/*
 * 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)

/*
 * 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
 *
 * This needs a node mem size of 26 bits.
 */
#define NODE_MEM_SIZE_BITS	26

#if !defined(__ASSEMBLY__) && defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
void cmx270_pci_adjust_zones(int node, unsigned long *size,
			     unsigned long *holes);

#define arch_adjust_zones(node, size, holes) \
	cmx270_pci_adjust_zones(node, size, holes)

#define ISA_DMA_THRESHOLD	(PHYS_OFFSET + SZ_64M - 1)
#endif

#endif