addrspace.h

来自「Linux内核源代码 为压缩文件 是<<Linux内核>&gt」· C头文件 代码 · 共 53 行

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1996 by Ralf Baechle
 *
 * Defitions for the address spaces of the MIPS CPUs.
 */
#ifndef __ASM_MIPS_ADDRSPACE_H
#define __ASM_MIPS_ADDRSPACE_H

/*
 * Memory segments (32bit kernel mode addresses)
 */
#define KUSEG                   0x00000000
#define KSEG0                   0x80000000
#define KSEG1                   0xa0000000
#define KSEG2                   0xc0000000
#define KSEG3                   0xe0000000

/*
 * Returns the kernel segment base of a given address
 */
#define KSEGX(a)                (((unsigned long)(a)) & 0xe0000000)

/*
 * Returns the physical address of a KSEG0/KSEG1 address
 */
#define PHYSADDR(a)		(((unsigned long)(a)) & 0x1fffffff)

/*
 * Map an address to a certain kernel segment
 */
#define KSEG0ADDR(a)		((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | KSEG0))
#define KSEG1ADDR(a)		((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | KSEG1))
#define KSEG2ADDR(a)		((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | KSEG2))
#define KSEG3ADDR(a)		((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | KSEG3))

/*
 * Memory segments (64bit kernel mode addresses)
 */
#define XKUSEG                  0x0000000000000000
#define XKSSEG                  0x4000000000000000
#define XKPHYS                  0x8000000000000000
#define XKSEG                   0xc000000000000000
#define CKSEG0                  0xffffffff80000000
#define CKSEG1                  0xffffffffa0000000
#define CKSSEG                  0xffffffffc0000000
#define CKSEG3                  0xffffffffe0000000

#endif /* __ASM_MIPS_ADDRSPACE_H */