/*
 * 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, 1999 by Ralf Baechle
 * Copyright (C) 1990, 1999 by Silicon Graphics, Inc.
 * Copyright (C) 2002  Maciej W. Rozycki
 */
#ifndef __ASM_MIPS64_ADDRSPACE_H
#define __ASM_MIPS64_ADDRSPACE_H

#include <linux/config.h>

/*
 *  Configure language
 */
#ifdef __ASSEMBLY__
#define _ATYPE_
#define _ATYPE32_
#define _ATYPE64_
#else
#define _ATYPE_		__PTRDIFF_TYPE__
#define _ATYPE32_	int
#define _ATYPE64_	long long
#endif

/*
 *  32-bit MIPS address spaces
 */
#ifdef __ASSEMBLY__
#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			0x0000000000000000
#define KSEG0			0xffffffff80000000
#define KSEG1			0xffffffffa0000000
#define KSEG2			0xffffffffc0000000
#define KSEG3			0xffffffffe0000000

/*
 * Returns the kernel segment base of a given address
 */
#define KSEGX(a)		((_ACAST64_ (a)) & 0xffffffffe0000000)

/*
 * Returns the physical address of a KSEG0/KSEG1 address
 */
#define XPHYSADDR(a)		((_ACAST64_ (a)) & 0x000000ffffffffff)
#define CPHYSADDR(a)		((_ACAST64_ (a)) & 0x000000001fffffff)

#ifndef __ASSEMBLY__
#define PHYSADDR(a) ({						\
	const _ATYPE64_ _a = _ACAST64_ (a);			\
	_a == _ACAST32_ _a ? CPHYSADDR(_a) : XPHYSADDR(_a); })
#endif

/*
 * Map an address to a certain kernel segment
 */
#define KSEG0ADDR(a)		(CPHYSADDR(a) | KSEG0)
#define KSEG1ADDR(a)		(CPHYSADDR(a) | KSEG1)
#define KSEG2ADDR(a)		(CPHYSADDR(a) | KSEG2)
#define KSEG3ADDR(a)		(CPHYSADDR(a) | 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

#if defined (CONFIG_CPU_R4300)						\
    || defined (CONFIG_CPU_R4X00)					\
    || defined (CONFIG_CPU_RM7000)					\
    || defined (CONFIG_CPU_RM9000)					\
    || defined (CONFIG_CPU_R5000)					\
    || defined (CONFIG_CPU_NEVADA)					\
    || defined (CONFIG_CPU_MIPS64)
#define	KUSIZE			0x0000010000000000	/* 2^^40 */
#define	KUSIZE_64		0x0000010000000000	/* 2^^40 */
#define	K0SIZE			0x0000001000000000	/* 2^^36 */
#define	K1SIZE			0x0000001000000000	/* 2^^36 */
#define	K2SIZE			0x000000ff80000000
#define	KSEGSIZE		0x000000ff80000000	/* max syssegsz */
#define TO_PHYS_MASK		0x0000000fffffffff	/* 2^^36 - 1 */
#endif

#if defined (CONFIG_CPU_R8000)
/* We keep KUSIZE consistent with R4000 for now (2^^40) instead of (2^^48) */
#define	KUSIZE			0x0000010000000000	/* 2^^40 */
#define	KUSIZE_64		0x0000010000000000	/* 2^^40 */
#define	K0SIZE			0x0000010000000000	/* 2^^40 */
#define	K1SIZE			0x0000010000000000	/* 2^^40 */
#define	K2SIZE			0x0001000000000000
#define	KSEGSIZE		0x0000010000000000	/* max syssegsz */
#define TO_PHYS_MASK		0x000000ffffffffff	/* 2^^40 - 1 */
#endif

#if defined (CONFIG_CPU_R10000)
#define	KUSIZE			0x0000010000000000	/* 2^^40 */
#define	KUSIZE_64		0x0000010000000000	/* 2^^40 */
#define	K0SIZE			0x0000010000000000	/* 2^^40 */
#define	K1SIZE			0x0000010000000000	/* 2^^40 */
#define	K2SIZE			0x00000fff80000000
#define	KSEGSIZE		0x00000fff80000000	/* max syssegsz */
#define TO_PHYS_MASK		0x000000ffffffffff	/* 2^^40 - 1 */
#endif

/*
 * Further names for SGI source compatibility.  These are stolen from
 * IRIX's <sys/mips_addrspace.h>.
 */
#define KUBASE			0
#define KUSIZE_32		0x0000000080000000	/* KUSIZE
							   for a 32 bit proc */
#ifdef CONFIG_CPU_RM7000
#define K0BASE			0x9800000000000000UL
#else
#define K0BASE			0xa800000000000000
#endif
#define K0BASE_EXL_WR		K0BASE			/* exclusive on write */
#define K0BASE_NONCOH		0x9800000000000000	/* noncoherent */
#define K0BASE_EXL		0xa000000000000000	/* exclusive */

#ifdef CONFIG_SGI_IP27
#define K1BASE			0x9600000000000000	/* uncached attr 3,
							   uncac */
#else
#define K1BASE			0x9000000000000000
#endif
#define K2BASE			0xc000000000000000

#if !defined (CONFIG_CPU_R8000)
#define COMPAT_K1BASE32		0xffffffffa0000000
#define PHYS_TO_COMPATK1(x)	((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
#endif

#define KDM_TO_PHYS(x)		(_ACAST64_ (x) & TO_PHYS_MASK)
#define PHYS_TO_K0(x)		(_ACAST64_ (x) | K0BASE)

#endif /* __ASM_MIPS64_ADDRSPACE_H */