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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) 1994, 1995, 1996, 1997, 2000, 2001 by Ralf Baechle

 * Copyright (C) 2000 Silicon Graphics, Inc.

 * Modified for further R[236]000 support by Paul M. Antoine, 1996.

 * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com

 * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.

 * Copyright (C) 2003  Maciej W. Rozycki

 */

#ifndef _ASM_MIPSREGS_H

#define _ASM_MIPSREGS_H

#include <linux/config.h>

#include <linux/linkage.h>

#include <asm/hazards.h>

/*

 * The following macros are especially useful for __asm__

 * inline assembler.

 */

#ifndef __STR

#define __STR(x) #x

#endif

#ifndef STR

#define STR(x) __STR(x)

#endif

/*

 *  Configure language

 */

#ifdef __ASSEMBLY__

#define _ULCAST_

#else

#define _ULCAST_ (unsigned long)

#endif

/*

 * Coprocessor 0 register names

 */

#define CP0_INDEX $0

#define CP0_RANDOM $1

#define CP0_ENTRYLO0 $2

#define CP0_ENTRYLO1 $3

#define CP0_CONF $3

#define CP0_CONTEXT $4

#define CP0_PAGEMASK $5

#define CP0_WIRED $6

#define CP0_INFO $7

#define CP0_BADVADDR $8

#define CP0_COUNT $9

#define CP0_ENTRYHI $10

#define CP0_COMPARE $11

#define CP0_STATUS $12

#define CP0_CAUSE $13

#define CP0_EPC $14

#define CP0_PRID $15

#define CP0_CONFIG $16

#define CP0_LLADDR $17

#define CP0_WATCHLO $18

#define CP0_WATCHHI $19

#define CP0_XCONTEXT $20

#define CP0_FRAMEMASK $21

#define CP0_DIAGNOSTIC $22

#define CP0_DEBUG $23

#define CP0_DEPC $24

#define CP0_PERFORMANCE $25

#define CP0_ECC $26

#define CP0_CACHEERR $27

#define CP0_TAGLO $28

#define CP0_TAGHI $29

#define CP0_ERROREPC $30

#define CP0_DESAVE $31

/*

 * R4640/R4650 cp0 register names.  These registers are listed

 * here only for completeness; without MMU these CPUs are not useable

 * by Linux.  A future ELKS port might take make Linux run on them

 * though ...

 */

#define CP0_IBASE $0

#define CP0_IBOUND $1

#define CP0_DBASE $2

#define CP0_DBOUND $3

#define CP0_CALG $17

#define CP0_IWATCH $18

#define CP0_DWATCH $19

/*

 * Coprocessor 0 Set 1 register names

 */

#define CP0_S1_DERRADDR0  $26

#define CP0_S1_DERRADDR1  $27

#define CP0_S1_INTCONTROL $20

/*

 *  TX39 Series

 */

#define CP0_TX39_CACHE  $7

/*

 * Coprocessor 1 (FPU) register names

 */

#define CP1_REVISION   $0

#define CP1_STATUS     $31

/*

 * FPU Status Register Values

 */

/*

 * Status Register Values

 */

#define FPU_CSR_FLUSH   0x01000000      /* flush denormalised results to 0 */

#define FPU_CSR_COND    0x00800000      /* $fcc0 */

#define FPU_CSR_COND0   0x00800000      /* $fcc0 */

#define FPU_CSR_COND1   0x02000000      /* $fcc1 */

#define FPU_CSR_COND2   0x04000000      /* $fcc2 */

#define FPU_CSR_COND3   0x08000000      /* $fcc3 */

#define FPU_CSR_COND4   0x10000000      /* $fcc4 */

#define FPU_CSR_COND5   0x20000000      /* $fcc5 */

#define FPU_CSR_COND6   0x40000000      /* $fcc6 */

#define FPU_CSR_COND7   0x80000000      /* $fcc7 */

/*

 * X the exception cause indicator

 * E the exception enable

 * S the sticky/flag bit

*/

#define FPU_CSR_ALL_X   0x0003f000

#define FPU_CSR_UNI_X   0x00020000

#define FPU_CSR_INV_X   0x00010000

#define FPU_CSR_DIV_X   0x00008000

#define FPU_CSR_OVF_X   0x00004000

#define FPU_CSR_UDF_X   0x00002000

#define FPU_CSR_INE_X   0x00001000

#define FPU_CSR_ALL_E   0x00000f80

#define FPU_CSR_INV_E   0x00000800

#define FPU_CSR_DIV_E   0x00000400

#define FPU_CSR_OVF_E   0x00000200

#define FPU_CSR_UDF_E   0x00000100

#define FPU_CSR_INE_E   0x00000080

#define FPU_CSR_ALL_S   0x0000007c

#define FPU_CSR_INV_S   0x00000040

#define FPU_CSR_DIV_S   0x00000020

#define FPU_CSR_OVF_S   0x00000010

#define FPU_CSR_UDF_S   0x00000008

#define FPU_CSR_INE_S   0x00000004

/* rounding mode */

#define FPU_CSR_RN      0x0     /* nearest */

#define FPU_CSR_RZ      0x1     /* towards zero */

#define FPU_CSR_RU      0x2     /* towards +Infinity */

#define FPU_CSR_RD      0x3     /* towards -Infinity */

/*

 * Values for PageMask register

 */

#ifdef CONFIG_CPU_VR41XX

/* Why doesn't stupidity hurt ... */

#define PM_1K           0x00000000

#define PM_4K           0x00001800

#define PM_16K          0x00007800

#define PM_64K          0x0001f800

#define PM_256K         0x0007f800

#else

#define PM_4K           0x00000000

#define PM_16K          0x00006000

#define PM_64K          0x0001e000

#define PM_256K         0x0007e000

#define PM_1M           0x001fe000

#define PM_4M           0x007fe000

#define PM_16M          0x01ffe000

#define PM_64M          0x07ffe000

#define PM_256M         0x1fffe000

#endif

/*

 * Default page size for a given kernel configuration

 */

#ifdef CONFIG_PAGE_SIZE_4KB

#define PM_DEFAULT_MASK PM_4K

#elif defined(CONFIG_PAGE_SIZE_16KB)

#define PM_DEFAULT_MASK PM_16K

#elif defined(CONFIG_PAGE_SIZE_64KB)

#define PM_DEFAULT_MASK PM_64K

#else

#error Bad page size configuration!

#endif

/*

 * Values used for computation of new tlb entries

 */

#define PL_4K           12

#define PL_16K          14

#define PL_64K          16

#define PL_256K         18

#define PL_1M           20

#define PL_4M           22

#define PL_16M          24

#define PL_64M          26

#define PL_256M         28

/*

 * R4x00 interrupt enable / cause bits

 */

#define IE_SW0          (_ULCAST_(1) <<  8)

#define IE_SW1          (_ULCAST_(1) <<  9)

#define IE_IRQ0         (_ULCAST_(1) << 10)

#define IE_IRQ1         (_ULCAST_(1) << 11)

#define IE_IRQ2         (_ULCAST_(1) << 12)

#define IE_IRQ3         (_ULCAST_(1) << 13)

#define IE_IRQ4         (_ULCAST_(1) << 14)

#define IE_IRQ5         (_ULCAST_(1) << 15)

/*

 * R4x00 interrupt cause bits

 */

#define C_SW0           (_ULCAST_(1) <<  8)

#define C_SW1           (_ULCAST_(1) <<  9)

#define C_IRQ0          (_ULCAST_(1) << 10)

#define C_IRQ1          (_ULCAST_(1) << 11)

#define C_IRQ2          (_ULCAST_(1) << 12)

#define C_IRQ3          (_ULCAST_(1) << 13)

#define C_IRQ4          (_ULCAST_(1) << 14)

#define C_IRQ5          (_ULCAST_(1) << 15)

/*

 * Bitfields in the R4xx0 cp0 status register

 */

#define ST0_IE                  0x00000001

#define ST0_EXL                 0x00000002

#define ST0_ERL                 0x00000004

#define ST0_KSU                 0x00000018

#  define KSU_USER              0x00000010

#  define KSU_SUPERVISOR        0x00000008

#  define KSU_KERNEL            0x00000000

#define ST0_UX                  0x00000020

#define ST0_SX                  0x00000040

#define ST0_KX                  0x00000080

#define ST0_DE                  0x00010000

#define ST0_CE                  0x00020000

/*

 * Bitfields in the R[23]000 cp0 status register.

 */

#define ST0_IEC                 0x00000001

#define ST0_KUC                 0x00000002

#define ST0_IEP                 0x00000004

#define ST0_KUP                 0x00000008

#define ST0_IEO                 0x00000010

#define ST0_KUO                 0x00000020

/* bits 6 & 7 are reserved on R[23]000 */

#define ST0_ISC                 0x00010000

#define ST0_SWC                 0x00020000

#define ST0_CM                  0x00080000

/*

 * Bits specific to the R4640/R4650

 */

#define ST0_UM                  (_ULCAST_(1) <<  4)

#define ST0_IL                  (_ULCAST_(1) << 23)

#define ST0_DL                  (_ULCAST_(1) << 24)

/*

 * Bitfields in the TX39 family CP0 Configuration Register 3

 */

#define TX39_CONF_ICS_SHIFT     19

#define TX39_CONF_ICS_MASK      0x00380000

#define TX39_CONF_ICS_1KB       0x00000000

#define TX39_CONF_ICS_2KB       0x00080000

#define TX39_CONF_ICS_4KB       0x00100000

#define TX39_CONF_ICS_8KB       0x00180000

#define TX39_CONF_ICS_16KB      0x00200000

#define TX39_CONF_DCS_SHIFT     16

#define TX39_CONF_DCS_MASK      0x00070000

#define TX39_CONF_DCS_1KB       0x00000000

#define TX39_CONF_DCS_2KB       0x00010000

#define TX39_CONF_DCS_4KB       0x00020000

#define TX39_CONF_DCS_8KB       0x00030000

#define TX39_CONF_DCS_16KB      0x00040000

#define TX39_CONF_CWFON         0x00004000

#define TX39_CONF_WBON          0x00002000

#define TX39_CONF_RF_SHIFT      10

#define TX39_CONF_RF_MASK       0x00000c00

#define TX39_CONF_DOZE          0x00000200

#define TX39_CONF_HALT          0x00000100

#define TX39_CONF_LOCK          0x00000080

#define TX39_CONF_ICE           0x00000020

#define TX39_CONF_DCE           0x00000010

#define TX39_CONF_IRSIZE_SHIFT  2

#define TX39_CONF_IRSIZE_MASK   0x0000000c

#define TX39_CONF_DRSIZE_SHIFT  0

#define TX39_CONF_DRSIZE_MASK   0x00000003

/*

 * Status register bits available in all MIPS CPUs.

 */

#define ST0_IM                  0x0000ff00

#define  STATUSB_IP0            8

#define  STATUSF_IP0            (_ULCAST_(1) <<  8)

#define  STATUSB_IP1            9

#define  STATUSF_IP1            (_ULCAST_(1) <<  9)

#define  STATUSB_IP2            10

#define  STATUSF_IP2            (_ULCAST_(1) << 10)

#define  STATUSB_IP3            11

#define  STATUSF_IP3            (_ULCAST_(1) << 11)

#define  STATUSB_IP4            12

#define  STATUSF_IP4            (_ULCAST_(1) << 12)

#define  STATUSB_IP5            13

#define  STATUSF_IP5            (_ULCAST_(1) << 13)

#define  STATUSB_IP6            14

#define  STATUSF_IP6            (_ULCAST_(1) << 14)

#define  STATUSB_IP7            15

#define  STATUSF_IP7            (_ULCAST_(1) << 15)

#define  STATUSB_IP8            0

#define  STATUSF_IP8            (_ULCAST_(1) <<  0)

#define  STATUSB_IP9            1

#define  STATUSF_IP9            (_ULCAST_(1) <<  1)

#define  STATUSB_IP10           2

#define  STATUSF_IP10           (_ULCAST_(1) <<  2)

#define  STATUSB_IP11           3

#define  STATUSF_IP11           (_ULCAST_(1) <<  3)

#define  STATUSB_IP12           4

#define  STATUSF_IP12           (_ULCAST_(1) <<  4)

#define  STATUSB_IP13           5

#define  STATUSF_IP13           (_ULCAST_(1) <<  5)

#define  STATUSB_IP14           6

#define  STATUSF_IP14           (_ULCAST_(1) <<  6)

#define  STATUSB_IP15           7

#define  STATUSF_IP15           (_ULCAST_(1) <<  7)

#define ST0_CH                  0x00040000

#define ST0_SR                  0x00100000

#define ST0_TS                  0x00200000

#define ST0_BEV                 0x00400000

#define ST0_RE                  0x02000000

#define ST0_FR                  0x04000000

#define ST0_CU                  0xf0000000

#define ST0_CU0                 0x10000000

#define ST0_CU1                 0x20000000

#define ST0_CU2                 0x40000000

#define ST0_CU3                 0x80000000

#define ST0_XX                  0x80000000      /* MIPS IV naming */

/*

 * Bitfields and bit numbers in the coprocessor 0 cause register.

 *

 * Refer to your MIPS R4xx0 manual, chapter 5 for explanation.

 */

#define  CAUSEB_EXCCODE         2

#define  CAUSEF_EXCCODE         (_ULCAST_(31)  <<  2)

#define  CAUSEB_IP              8

#define  CAUSEF_IP              (_ULCAST_(255) <<  8)

#define  CAUSEB_IP0             8

#define  CAUSEF_IP0             (_ULCAST_(1)   <<  8)

#define  CAUSEB_IP1             9

#define  CAUSEF_IP1             (_ULCAST_(1)   <<  9)

#define  CAUSEB_IP2             10

#define  CAUSEF_IP2             (_ULCAST_(1)   << 10)

#define  CAUSEB_IP3             11

#define  CAUSEF_IP3             (_ULCAST_(1)   << 11)

#define  CAUSEB_IP4             12

#define  CAUSEF_IP4             (_ULCAST_(1)   << 12)

#define  CAUSEB_IP5             13

#define  CAUSEF_IP5             (_ULCAST_(1)   << 13)

#define  CAUSEB_IP6             14

#define  CAUSEF_IP6             (_ULCAST_(1)   << 14)

#define  CAUSEB_IP7             15

#define  CAUSEF_IP7             (_ULCAST_(1)   << 15)

#define  CAUSEB_IV              23

#define  CAUSEF_IV              (_ULCAST_(1)   << 23)

#define  CAUSEB_CE              28

#define  CAUSEF_CE              (_ULCAST_(3)   << 28)

#define  CAUSEB_BD              31

#define  CAUSEF_BD              (_ULCAST_(1)   << 31)

/*

 * Bits in the coprocessor 0 config register.

 */

/* Generic bits.  */

#define CONF_CM_CACHABLE_NO_WA          0

#define CONF_CM_CACHABLE_WA             1

#define CONF_CM_UNCACHED                2

#define CONF_CM_CACHABLE_NONCOHERENT    3

#define CONF_CM_CACHABLE_CE             4

#define CONF_CM_CACHABLE_COW            5

#define CONF_CM_CACHABLE_CUW            6

#define CONF_CM_CACHABLE_ACCELERATED    7

#define CONF_CM_CMASK                   7

#define CONF_BE                 (_ULCAST_(1) << 15)

/* Bits common to various processors.  */

#define CONF_CU                 (_ULCAST_(1) <<  3)

#define CONF_DB                 (_ULCAST_(1) <<  4)

#define CONF_IB                 (_ULCAST_(1) <<  5)

#define CONF_DC                 (_ULCAST_(7) <<  6)

#define CONF_IC                 (_ULCAST_(7) <<  9)

#define CONF_EB                 (_ULCAST_(1) << 13)

#define CONF_EM                 (_ULCAST_(1) << 14)

#define CONF_SM                 (_ULCAST_(1) << 16)

#define CONF_SC                 (_ULCAST_(1) << 17)

#define CONF_EW                 (_ULCAST_(3) << 18)

#define CONF_EP                 (_ULCAST_(15)<< 24)

#define CONF_EC                 (_ULCAST_(7) << 28)

#define CONF_CM                 (_ULCAST_(1) << 31)

/* Bits specific to the R4xx0.  */

#define R4K_CONF_SW             (_ULCAST_(1) << 20)

#define R4K_CONF_SS             (_ULCAST_(1) << 21)

#define R4K_CONF_SB             (_ULCAST_(3) << 22)

/* Bits specific to the R5000.  */

#define R5K_CONF_SE             (_ULCAST_(1) << 12)

#define R5K_CONF_SS             (_ULCAST_(3) << 20)

/* Bits specific to the R10000.  */

#define R10K_CONF_DN            (_ULCAST_(3) <<  3)

#define R10K_CONF_CT            (_ULCAST_(1) <<  5)

#define R10K_CONF_PE            (_ULCAST_(1) <<  6)

#define R10K_CONF_PM            (_ULCAST_(3) <<  7)

#define R10K_CONF_EC            (_ULCAST_(15)<<  9)

#define R10K_CONF_SB            (_ULCAST_(1) << 13)

#define R10K_CONF_SK            (_ULCAST_(1) << 14)

#define R10K_CONF_SS            (_ULCAST_(7) << 16)

#define R10K_CONF_SC            (_ULCAST_(7) << 19)

#define R10K_CONF_DC            (_ULCAST_(7) << 26)

#define R10K_CONF_IC            (_ULCAST_(7) << 29)

/* Bits specific to the VR41xx.  */

#define VR41_CONF_CS            (_ULCAST_(1) << 12)

#define VR41_CONF_M16           (_ULCAST_(1) << 20)

#define VR41_CONF_AD            (_ULCAST_(1) << 23)

/* Bits specific to the R30xx.  */

#define R30XX_CONF_FDM          (_ULCAST_(1) << 19)

#define R30XX_CONF_REV          (_ULCAST_(1) << 22)

#define R30XX_CONF_AC           (_ULCAST_(1) << 23)

#define R30XX_CONF_RF           (_ULCAST_(1) << 24)

#define R30XX_CONF_HALT         (_ULCAST_(1) << 25)

#define R30XX_CONF_FPINT        (_ULCAST_(7) << 26)

#define R30XX_CONF_DBR          (_ULCAST_(1) << 29)

#define R30XX_CONF_SB           (_ULCAST_(1) << 30)

#define R30XX_CONF_LOCK         (_ULCAST_(1) << 31)

/* Bits specific to the TX49.  */

#define TX49_CONF_DC            (_ULCAST_(1) << 16)

#define TX49_CONF_IC            (_ULCAST_(1) << 17)  /* conflict with CONF_SC */

#define TX49_CONF_HALT          (_ULCAST_(1) << 18)

#define TX49_CONF_CWFON         (_ULCAST_(1) << 27)

/* Bits specific to the MIPS32/64 PRA.  */

#define MIPS_CONF_MT            (_ULCAST_(7) <<  7)

#define MIPS_CONF_AR            (_ULCAST_(7) << 10)

#define MIPS_CONF_AT            (_ULCAST_(3) << 13)

#define MIPS_CONF_M             (_ULCAST_(1) << 31)

/*

 * R10000 performance counter definitions.

 *

 * FIXME: The R10000 performance counter opens a nice way to implement CPU

 *        time accounting with a precission of one cycle.  I don't have

 *        R10000 silicon but just a manual, so ...

 */

/*

 * Events counted by counter #0

 */

#define CE0_CYCLES                      0

#define CE0_INSN_ISSUED                 1

#define CE0_LPSC_ISSUED                 2

#define CE0_S_ISSUED                    3

#define CE0_SC_ISSUED                   4

#define CE0_SC_FAILED                   5

#define CE0_BRANCH_DECODED              6

#define CE0_QW_WB_SECONDARY             7

#define CE0_CORRECTED_ECC_ERRORS        8

#define CE0_ICACHE_MISSES               9

#define CE0_SCACHE_I_MISSES             10

#define CE0_SCACHE_I_WAY_MISSPREDICTED  11

#define CE0_EXT_INTERVENTIONS_REQ       12

#define CE0_EXT_INVALIDATE_REQ          13

#define CE0_VIRTUAL_COHERENCY_COND      14

#define CE0_INSN_GRADUATED              15

/*

 * Events counted by counter #1

 */

#define CE1_CYCLES                      0

#define CE1_INSN_GRADUATED              1

#define CE1_LPSC_GRADUATED              2

#define CE1_S_GRADUATED                 3

#define CE1_SC_GRADUATED                4

#define CE1_FP_INSN_GRADUATED           5

#define CE1_QW_WB_PRIMARY               6

#define CE1_TLB_REFILL                  7

#define CE1_BRANCH_MISSPREDICTED        8

#define CE1_DCACHE_MISS                 9

#define CE1_SCACHE_D_MISSES             10

#define CE1_SCACHE_D_WAY_MISSPREDICTED  11

#define CE1_EXT_INTERVENTION_HITS       12

#define CE1_EXT_INVALIDATE_REQ          13

#define CE1_SP_HINT_TO_CEXCL_SC_BLOCKS  14

#define CE1_SP_HINT_TO_SHARED_SC_BLOCKS 15

/*

 * These flags define in which priviledge mode the counters count events

 */

#define CEB_USER        8       /* Count events in user mode, EXL = ERL = 0 */

#define CEB_SUPERVISOR  4       /* Count events in supvervisor mode EXL = ERL = 0 */

#define CEB_KERNEL      2       /* Count events in kernel mode EXL = ERL = 0 */

#define CEB_EXL         1       /* Count events with EXL = 1, ERL = 0 */

#ifndef __ASSEMBLY__

/*

 * Functions to access the r10k performance counter and control registers

 */

#define read_r10k_perf_cntr(counter)                            \

({ unsigned int __res;                                          \

        __asm__ __volatile__(                                   \

        "mfpc\t%0, "STR(counter)                                \

        : "=r" (__res));                                        \

        __res;})

#define write_r10k_perf_cntr(counter,val)                       \

        __asm__ __volatile__(                                   \

        "mtpc\t%0, "STR(counter)                                \

        : : "r" (val));

#define read_r10k_perf_cntl(counter)                            \

({ unsigned int __res;                                          \

        __asm__ __volatile__(                                   \

        "mfps\t%0, "STR(counter)                                \

        : "=r" (__res));                                        \

        __res;})

#define write_r10k_perf_cntl(counter,val)                       \

        __asm__ __volatile__(                                   \

        "mtps\t%0, "STR(counter)                                \

        : : "r" (val));

/*

 * Macros to access the system control coprocessor

 */

#define __read_32bit_c0_register(source, sel)                           \

({ int __res;                                                           \

        if (sel == 0)                                                    \

                __asm__ __volatile__(                                   \

                        "mfc0\t%0, " #source "\n\t"                     \

                        : "=r" (__res));                                \

        else                                                            \

                __asm__ __volatile__(                                   \

                        ".set\tmips32\n\t"                              \

                        "mfc0\t%0, " #source ", " #sel "\n\t"           \

                        ".set\tmips0\n\t"                               \

                        : "=r" (__res));                                \

        __res;                                                          \

})

#define __read_64bit_c0_register(source, sel)                           \

({ unsigned long __res;                                                 \

        if (sel == 0)                                                    \

                __asm__ __volatile__(                                   \

                        ".set\tmips3\n\t"                               \

                        "dmfc0\t%0, " #source "\n\t"                    \

                        ".set\tmips0"                                   \

                        : "=r" (__res));                                \

        else                                                            \

                __asm__ __volatile__(                                   \

                        ".set\tmips64\n\t"                              \

                        "dmfc0\t%0, " #source ", " #sel "\n\t"          \

                        ".set\tmips0"                                   \

                        : "=r" (__res));                                \

        __res;                                                          \

})

#define __write_32bit_c0_register(register, sel, value)                 \

do {                                                                    \

        if (sel == 0)                                                    \

                __asm__ __volatile__(                                   \

                        "mtc0\t%z0, " #register "\n\t"                  \

                        : : "Jr" (value));                              \

        else                                                            \

                __asm__ __volatile__(                                   \

                        ".set\tmips32\n\t"                              \

                        "mtc0\t%z0, " #register ", " #sel "\n\t"        \

                        ".set\tmips0"                                   \

                        : : "Jr" (value));                              \

} while (0)

#define __write_64bit_c0_register(register, sel, value)                 \

do {                                                                    \

        if (sel == 0)                                                    \

                __asm__ __volatile__(                                   \

                        ".set\tmips3\n\t"                               \

                        "dmtc0\t%z0, " #register "\n\t"                 \

                        ".set\tmips0"                                   \

                        : : "Jr" (value));                              \

        else                                                            \

                __asm__ __volatile__(                                   \

                        ".set\tmips64\n\t"                              \

                        "dmtc0\t%z0, " #register ", " #sel "\n\t"       \

                        ".set\tmips0"                                   \

                        : : "Jr" (value));                              \

} while (0)

#define __read_ulong_c0_register(reg, sel)                              \

        ((sizeof(unsigned long) == 4) ?                                 \

        __read_32bit_c0_register(reg, sel) :                            \

        __read_64bit_c0_register(reg, sel))

#define __write_ulong_c0_register(reg, sel, val)                        \

do {                                                                    \

        if (sizeof(unsigned long) == 4)                                 \

                __write_32bit_c0_register(reg, sel, val);               \

        else                                                            \

                __write_64bit_c0_register(reg, sel, val);               \

} while (0)

/*

 * These versions are only needed for systems with more than 38 bits of

 * physical address space running the 32-bit kernel.  That's none atm :-)

 */

#define __read_64bit_c0_split(source, sel)                              \

({                                                                      \

        unsigned long long val;                                         \

        unsigned long flags;                                            \

                                                                        \

        local_irq_save(flags);                                          \

        if (sel == 0)                                                    \

                __asm__ __volatile__(                                   \

                        ".set\tmips64\n\t"                              \

                        "dmfc0\t%M0, " #source "\n\t"                   \

                        "dsll\t%L0, %M0, 32\n\t"                        \

                        "dsrl\t%M0, %M0, 32\n\t"                        \

                        "dsrl\t%L0, %L0, 32\n\t"                        \

                        ".set\tmips0"                                   \

                        : "=r" (val));                                  \

        else                                                            \

                __asm__ __volatile__(                                   \

                        ".set\tmips64\n\t"                              \

                        "dmfc0\t%M0, " #source ", " #sel "\n\t"         \

                        "dsll\t%L0, %M0, 32\n\t"                        \

                        "dsrl\t%M0, %M0, 32\n\t"                        \

                        "dsrl\t%L0, %L0, 32\n\t"                        \

                        ".set\tmips0"                                   \

                        : "=r" (val));                                  \

        local_irq_restore(flags);                                       \

                                                                        \

        val;                                                            \

})

#define __write_64bit_c0_split(source, sel, val)                        \

do {                                                                    \

        unsigned long flags;                                            \

                                                                        \

        local_irq_save(flags);                                          \

        if (sel == 0)                                                    \

                __asm__ __volatile__(                                   \

                        ".set\tmips64\n\t"                              \

                        "dsll\t%L0, %L0, 32\n\t"                        \

                        "dsrl\t%L0, %L0, 32\n\t"                        \

                        "dsll\t%M0, %M0, 32\n\t"                        \

                        "or\t%L0, %L0, %M0\n\t"                         \

                        "dmtc0\t%L0, " #source "\n\t"                   \

                        ".set\tmips0"                                   \

                        : : "r" (val));                                 \

        else                                                            \

                __asm__ __volatile__(                                   \

                        ".set\tmips64\n\t"                              \

                        "dsll\t%L0, %L0, 32\n\t"                        \

                        "dsrl\t%L0, %L0, 32\n\t"                        \

                        "dsll\t%M0, %M0, 32\n\t"                        \

                        "or\t%L0, %L0, %M0\n\t"                         \

                        "dmtc0\t%L0, " #source ", " #sel "\n\t"         \

                        ".set\tmips0"                                   \

                        : : "r" (val));                                 \

        local_irq_restore(flags);                                       \

} while (0)

#define read_c0_index()         __read_32bit_c0_register($0, 0)

#define write_c0_index(val)     __write_32bit_c0_register($0, 0, val)

#define read_c0_entrylo0()      __read_ulong_c0_register($2, 0)

#define write_c0_entrylo0(val)  __write_ulong_c0_register($2, 0, val)

#define read_c0_entrylo1()      __read_ulong_c0_register($3, 0)

#define write_c0_entrylo1(val)  __write_ulong_c0_register($3, 0, val)

#define read_c0_conf()          __read_32bit_c0_register($3, 0)

#define write_c0_conf(val)      __write_32bit_c0_register($3, 0, val)

#define read_c0_context()       __read_ulong_c0_register($4, 0)

#define write_c0_context(val)   __write_ulong_c0_register($4, 0, val)

#define read_c0_pagemask()      __read_32bit_c0_register($5, 0)

#define write_c0_pagemask(val)  __write_32bit_c0_register($5, 0, val)

#define read_c0_wired()         __read_32bit_c0_register($6, 0)

#define write_c0_wired(val)     __write_32bit_c0_register($6, 0, val)

#define read_c0_info()          __read_32bit_c0_register($7, 0)

#define read_c0_cache()         __read_32bit_c0_register($7, 0) /* TX39xx */

#define write_c0_cache(val)     __write_32bit_c0_register($7, 0, val)

#define read_c0_count()         __read_32bit_c0_register($9, 0)

#define write_c0_count(val)     __write_32bit_c0_register($9, 0, val)

#define read_c0_entryhi()       __read_ulong_c0_register($10, 0)

#define write_c0_entryhi(val)   __write_ulong_c0_register($10, 0, val)

#define read_c0_compare()       __read_32bit_c0_register($11, 0)

#define write_c0_compare(val)   __write_32bit_c0_register($11, 0, val)

#define read_c0_status()        __read_32bit_c0_register($12, 0)

#define write_c0_status(val)    __write_32bit_c0_register($12, 0, val)

#define read_c0_cause()         __read_32bit_c0_register($13, 0)

#define write_c0_cause(val)     __write_32bit_c0_register($13, 0, val)

#define read_c0_prid()          __read_32bit_c0_register($15, 0)

#define read_c0_config()        __read_32bit_c0_register($16, 0)

#define read_c0_config1()       __read_32bit_c0_register($16, 1)

#define read_c0_config2()       __read_32bit_c0_register($16, 2)

#define read_c0_config3()       __read_32bit_c0_register($16, 3)

#define write_c0_config(val)    __write_32bit_c0_register($16, 0, val)

#define write_c0_config1(val)   __write_32bit_c0_register($16, 1, val)

#define write_c0_config2(val)   __write_32bit_c0_register($16, 2, val)

#define write_c0_config3(val)   __write_32bit_c0_register($16, 3, val)

/*

 * The WatchLo register.  There may be upto 8 of them.

 */

#define read_c0_watchlo0()      __read_ulong_c0_register($18, 0)

#define read_c0_watchlo1()      __read_ulong_c0_register($18, 1)

#define read_c0_watchlo2()      __read_ulong_c0_register($18, 2)

#define read_c0_watchlo3()      __read_ulong_c0_register($18, 3)

#define read_c0_watchlo4()      __read_ulong_c0_register($18, 4)

#define read_c0_watchlo5()      __read_ulong_c0_register($18, 5)

#define read_c0_watchlo6()      __read_ulong_c0_register($18, 6)

#define read_c0_watchlo7()      __read_ulong_c0_register($18, 7)

#define write_c0_watchlo0(val)  __write_ulong_c0_register($18, 0, val)

#define write_c0_watchlo1(val)  __write_ulong_c0_register($18, 1, val)

#define write_c0_watchlo2(val)  __write_ulong_c0_register($18, 2, val)

#define write_c0_watchlo3(val)  __write_ulong_c0_register($18, 3, val)

#define write_c0_watchlo4(val)  __write_ulong_c0_register($18, 4, val)

#define write_c0_watchlo5(val)  __write_ulong_c0_register($18, 5, val)

#define write_c0_watchlo6(val)  __write_ulong_c0_register($18, 6, val)

#define write_c0_watchlo7(val)  __write_ulong_c0_register($18, 7, val)

/*

 * The WatchHi register.  There may be upto 8 of them.

 */

#define read_c0_watchhi0()      __read_32bit_c0_register($19, 0)

#define read_c0_watchhi1()      __read_32bit_c0_register($19, 1)

#define read_c0_watchhi2()      __read_32bit_c0_register($19, 2)

#define read_c0_watchhi3()      __read_32bit_c0_register($19, 3)

#define read_c0_watchhi4()      __read_32bit_c0_register($19, 4)

#define read_c0_watchhi5()      __read_32bit_c0_register($19, 5)

#define read_c0_watchhi6()      __read_32bit_c0_register($19, 6)

#define read_c0_watchhi7()      __read_32bit_c0_register($19, 7)

#define write_c0_watchhi0(val)  __write_32bit_c0_register($19, 0, val)

#define write_c0_watchhi1(val)  __write_32bit_c0_register($19, 1, val)

#define write_c0_watchhi2(val)  __write_32bit_c0_register($19, 2, val)

#define write_c0_watchhi3(val)  __write_32bit_c0_register($19, 3, val)

#define write_c0_watchhi4(val)  __write_32bit_c0_register($19, 4, val)

#define write_c0_watchhi5(val)  __write_32bit_c0_register($19, 5, val)

#define write_c0_watchhi6(val)  __write_32bit_c0_register($19, 6, val)

#define write_c0_watchhi7(val)  __write_32bit_c0_register($19, 7, val)

#define read_c0_xcontext()      __read_ulong_c0_register($20, 0)

#define write_c0_xcontext(val)  __write_ulong_c0_register($20, 0, val)

#define read_c0_intcontrol()    __read_32bit_c0_register($20, 1)

#define write_c0_intcontrol(val) __write_32bit_c0_register($20, 1, val)

#define read_c0_framemask()     __read_32bit_c0_register($21, 0)

#define write_c0_framemask(val) __write_32bit_c0_register($21, 0, val)

#define read_c0_debug()         __read_32bit_c0_register($23, 0)

#define write_c0_debug(val)     __write_32bit_c0_register($23, 0, val)

#define read_c0_depc()          __read_ulong_c0_register($24, 0)

#define write_c0_depc(val)      __write_ulong_c0_register($24, 0, val)

#define read_c0_ecc()           __read_32bit_c0_register($26, 0)