/*
* 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, 99 Ralf Baechle
* Copyright (C) 2000, 2002 Maciej W. Rozycki
* Copyright (C) 1990, 1999 by Silicon Graphics, Inc.
*/
#ifndef _ASM_ADDRSPACE_H
#define _ASM_ADDRSPACE_H

#include <spaces.h>

/*
* Configure language
*/
#ifdef __ASSEMBLY__
#define _ATYPE_
#define _ATYPE32_
#define _ATYPE64_
#define _CONST64_(x) x
#else
#define _ATYPE_ __PTRDIFF_TYPE__
#define _ATYPE32_ int
#define _ATYPE64_ __s64
#ifdef CONFIG_64BIT
#define _CONST64_(x) x ## L
#else
#define _CONST64_(x) x ## LL
#endif
#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

/*
* Returns the kernel segment base of a given address
*/
#define KSEGX(a) ((_ACAST32_ (a)) & 0xe0000000)

/*
* Returns the physical address of a CKSEGx / XKPHYS address
*/
#define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
#define XPHYSADDR(a) ((_ACAST64_(a)) & \
_CONST64_(0x000000ffffffffff))

#ifdef CONFIG_64BIT

/*
* Memory segments (64bit kernel mode addresses)
* The compatibility segments use the full 64-bit sign extended value. Note
* the R8000 doesn't have them so don't reference these in generic MIPS code.
*/
#define XKUSEG _CONST64_(0x0000000000000000)
#define XKSSEG _CONST64_(0x4000000000000000)
#define XKPHYS _CONST64_(0x8000000000000000)
#define XKSEG _CONST64_(0xc000000000000000)
#define CKSEG0 _CONST64_(0xffffffff80000000)
#define CKSEG1 _CONST64_(0xffffffffa0000000)
#define CKSSEG _CONST64_(0xffffffffc0000000)
#define CKSEG3 _CONST64_(0xffffffffe0000000)

#define CKSEG0ADDR(a) (CPHYSADDR(a) | CKSEG0)
#define CKSEG1ADDR(a) (CPHYSADDR(a) | CKSEG1)
#define CKSEG2ADDR(a) (CPHYSADDR(a) | CKSEG2)
#define CKSEG3ADDR(a) (CPHYSADDR(a) | CKSEG3)

#else

#define CKSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
#define CKSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
#define CKSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
#define CKSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)

/*
* 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 (32bit kernel mode addresses)
* These are the traditional names used in the 32-bit universe.
*/
#define KUSEG 0x00000000
#define KSEG0 0x80000000
#define KSEG1 0xa0000000
#define KSEG2 0xc0000000
#define KSEG3 0xe0000000

#define CKUSEG 0x00000000
#define CKSEG0 0x80000000
#define CKSEG1 0xa0000000
#define CKSEG2 0xc0000000
#define CKSEG3 0xe0000000

#endif

/*
* 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

/*
* 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) (_CONST64_(0x8000000000000000) | \
(_CONST64_(cm) << 59) | (a))

/*
* The ultimate limited of the 64-bit MIPS architecture: 2 bits for selecting
* the region, 3 bits for the CCA mode. This leaves 59 bits of which the
* R8000 implements most with its 48-bit physical address space.
*/
#define TO_PHYS_MASK _CONST64_(0x07ffffffffffffff) /* 2^^59 - 1 */

#ifndef CONFIG_CPU_R8000

/*
* The R8000 doesn't have the 32-bit compat spaces so we don't define them
* in order to catch bugs in the source code.
*/

#define COMPAT_K1BASE32 _CONST64_(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) | CAC_BASE)

#endif /* _ASM_ADDRSPACE_H */