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/*

 * 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, 2002  Maciej W. Rozycki

 *

 * Definitions for the address spaces of the MIPS CPUs.

 */

#ifndef __ASM_MIPS_ADDRSPACE_H

#define __ASM_MIPS_ADDRSPACE_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                   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)

/*

 * Returns the physical address of a KSEG0/KSEG1 address

 */

#define CPHYSADDR(a)            ((_ACAST32_ (a)) & 0x1fffffff)

#ifndef __ASSEMBLY__

#define PHYSADDR(a)             CPHYSADDR(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

/*

 * 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                    0xfffffffffULL          /* 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_MIPS_ADDRSPACE_H */