addrspace.h

来自「国产CPU－龙芯（loongson)BIOS源代码」· C头文件 代码 · 共 96 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
 * Copyright (C) 2000 by Maciej W. Rozycki
 *
 * Defitions for the address spaces of the MIPS CPUs.
 */
#ifndef __ASM_ADDRSPACE_H
#define __ASM_ADDRSPACE_H

/*
 *  Configure language
 */

#ifdef __ASSEMBLER__
#define _ATYPE_
#define _ATYPE32_
#define _ATYPE64_
#else
#define _ATYPE_		(__SIZE_TYPE__)
#define _ATYPE32_	(int)
#define _ATYPE64_	(long long)
#endif

/*
 *  32-bit MIPS Address Spaces
 */

#ifdef __ASSEMBLER__
#define _ACAST32_
#define _ACAST64_
#else
#define _ACAST32_		_ATYPE_ _ATYPE32_	/* widen if necessary */
#define _ACAST64_		_ATYPE64_		/* do _not_ narrow */
#endif

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

#define K0BASE			KSEG0

/*
 * Returns the kernel segment base of a given address
 */
#define KSEGX(a)                ((_ACAST32_ (a)) & 0xe0000000)
#define PHYSADDR(a)		((_ACAST32_ (a)) & 0x1fffffff)
#define KSEG0ADDR(a)		(((_ACAST32_ (a)) & 0x1fffffff) | KSEG0)
#define KSEG1ADDR(a)		(((_ACAST32_ (a)) & 0x1fffffff) | KSEG1)
#define KSEG2ADDR(a)		(((_ACAST32_ (a)) & 0x1fffffff) | KSEG2)
#define KSEG3ADDR(a)		(((_ACAST32_ (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

/*
 * Cache modes for XKPHYS address conversion macros
 */
#define K_CALG_COH_EXCL1_NOL2	0
#define K_CALG_COH_SHRL1_NOL2	1
#define K_CALG_UNCACHED		2
#define K_CALG_NONCOHERENT	3
#define K_CALG_COH_EXCL		4
#define K_CALG_COH_SHAREABLE	5
#define K_CALG_NOTUSED		6
#define K_CALG_UNCACHED_ACCEL	7

#define TO_PHYS_MASK		0xfffffffff			/* 36 bit */

/*
 * 64-bit address conversions
 */
#define PHYS_TO_XKSEG_UNCACHED(p)	PHYS_TO_XKPHYS(K_CALG_UNCACHED,(p))
#define PHYS_TO_XKSEG_CACHED(p)		PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE,(p))
#define XKPHYS_TO_PHYS(p)		((p) & TO_PHYS_MASK)
#define PHYS_TO_XKPHYS(cm,a)		(0x8000000000000000 | ((cm)<<59) | (a))

#endif /* __ASM_ADDRSPACE_H */