html/doxygen/idtcpu_8h_source.html

/*
 * Based upon IDT provided code with the following release:
 *
 * This source code has been made available to you by IDT on an AS-IS
 * basis. Anyone receiving this source is licensed under IDT copyrights
 * to use it in any way he or she deems fit, including copying it,
 * modifying it, compiling it, and redistributing it either with or
 * without modifications.  No license under IDT patents or patent
 * applications is to be implied by the copyright license.
 *
 * Any user of this software should understand that IDT cannot provide
 * technical support for this software and will not be responsible for
 * any consequences resulting from the use of this software.
 *
 * Any person who transfers this source code or any derivative work must
 * include the IDT copyright notice, this paragraph, and the preceeding
 * two paragraphs in the transferred software.
 *
 * COPYRIGHT IDT CORPORATION 1996
 * LICENSED MATERIAL - PROGRAM PROPERTY OF IDT
 */

#ifndef _RTEMS_MIPS_IDTCPU_H
#define _RTEMS_MIPS_IDTCPU_H

/*
 * 950313: Ketan added Register definition for XContext reg.
 *               added define for WAIT instruction.
 * 950421: Ketan added Register definition for Config reg (R3081)
 */

/*
** memory configuration and mapping
*/
#define K0BASE  0x80000000
#define K0SIZE  0x20000000
#define K1BASE  0xa0000000
#define K1SIZE  0x20000000
#define K2BASE  0xc0000000
#define K2SIZE  0x20000000
#if  __mips == 3
#define KSBASE  0xe0000000
#define KSSIZE  0x20000000
#endif

#define KUBASE  0
#define KUSIZE  0x80000000

/*
** Exception Vectors
*/
#if  __mips == 1
#define UT_VEC  K0BASE          /* utlbmiss vector */
#define DB_VEC  (K0BASE+0x40)           /* debug vector */
#define E_VEC   (K0BASE+0x80)       /* exception vector */
#elif  __mips == 32
#define T_VEC   (K0BASE+0x000)      /* tlbmiss vector */
#define X_VEC   (K0BASE+0x080)      /* xtlbmiss vector */
#define C_VEC   (K0BASE+0x100)      /* cache error vector */
#define E_VEC   (K0BASE+0x180)      /* exception vector */
#elif  __mips == 3
#define T_VEC   (K0BASE+0x000)      /* tlbmiss vector */
#define X_VEC   (K0BASE+0x080)      /* xtlbmiss vector */
#define C_VEC   (K0BASE+0x100)      /* cache error vector */
#define E_VEC   (K0BASE+0x180)      /* exception vector */
#else
#error "EXCEPTION VECTORS: unknown ISA level"
#endif
#define R_VEC   (K1BASE+0x1fc00000) /* reset vector */

/*
** Address conversion macros
*/
#ifdef CLANGUAGE
#define CAST(as) (as)
#else
#define CAST(as)
#endif
#define K0_TO_K1(x) (CAST(unsigned)(x)|0xA0000000)  /* kseg0 to kseg1 */
#define K1_TO_K0(x) (CAST(unsigned)(x)&0x9FFFFFFF)  /* kseg1 to kseg0 */
#define K0_TO_PHYS(x)   (CAST(unsigned)(x)&0x1FFFFFFF)  /* kseg0 to physical */
#define K1_TO_PHYS(x)   (CAST(unsigned)(x)&0x1FFFFFFF)  /* kseg1 to physical */
#define PHYS_TO_K0(x)   (CAST(unsigned)(x)|0x80000000)  /* physical to kseg0 */
#define PHYS_TO_K1(x)   (CAST(unsigned)(x)|0xA0000000)  /* physical to kseg1 */

/*
**  Cache size constants
*/
#define MINCACHE    0x200       /* 512       For 3041. */
#define MAXCACHE    0x40000     /* 256*1024   256k */

#if  __mips == 32
/* R4000 configuration register definitions */
#define CFG_CM      0x80000000  /* Master-Checker mode */
#define CFG_ECMASK  0x70000000  /* System Clock Ratio */
#define CFG_ECBY2   0x00000000  /* divide by 2 */
#define CFG_ECBY3   0x10000000  /* divide by 3 */
#define CFG_ECBY4   0x20000000  /* divide by 4 */
#define CFG_EPMASK  0x0f000000  /* Transmit data pattern */
#define CFG_EPD     0x00000000  /* D */
#define CFG_EPDDX   0x01000000  /* DDX */
#define CFG_EPDDXX  0x02000000  /* DDXX */
#define CFG_EPDXDX  0x03000000  /* DXDX */
#define CFG_EPDDXXX 0x04000000  /* DDXXX */
#define CFG_EPDDXXXX    0x05000000  /* DDXXXX */
#define CFG_EPDXXDXX    0x06000000  /* DXXDXX */
#define CFG_EPDDXXXXX   0x07000000  /* DDXXXXX */
#define CFG_EPDXXXDXXX  0x08000000  /* DXXXDXXX */
#define CFG_SBMASK  0x00c00000  /* Secondary cache block size */
#define CFG_SBSHIFT 22
#define CFG_SB4     0x00000000  /* 4 words */
#define CFG_SB8     0x00400000  /* 8 words */
#define CFG_SB16    0x00800000  /* 16 words */
#define CFG_SB32    0x00c00000  /* 32 words */
#define CFG_SS      0x00200000  /* Split secondary cache */
#define CFG_SW      0x00100000  /* Secondary cache port width */
#define CFG_EWMASK  0x000c0000  /* System port width */
#define CFG_EWSHIFT 18
#define CFG_EW64    0x00000000  /* 64 bit */
#define CFG_EW32    0x00010000  /* 32 bit */
#define CFG_SC      0x00020000  /* Secondary cache absent */
#define CFG_SM      0x00010000  /* Dirty Shared mode disabled */
#define CFG_BE      0x00008000  /* Big Endian */
#define CFG_EM      0x00004000  /* ECC mode enable */
#define CFG_EB      0x00002000  /* Block ordering */
#define CFG_ICMASK  0x00000e00  /* Instruction cache size */
#define CFG_ICSHIFT 9
#define CFG_DCMASK  0x000001c0  /* Data cache size */
#define CFG_DCSHIFT 6
#define CFG_IB      0x00000020  /* Instruction cache block size */
#define CFG_DB      0x00000010  /* Data cache block size */
#define CFG_CU      0x00000008  /* Update on Store Conditional */
#define CFG_K0MASK  0x00000007  /* KSEG0 coherency algorithm */

/*
 * R4000 primary cache mode
 */
#define CFG_C_UNCACHED      2
#define CFG_C_NONCOHERENT   3
#define CFG_C_COHERENTXCL   4
#define CFG_C_COHERENTXCLW  5
#define CFG_C_COHERENTUPD   6

/*
 * R4000 cache operations (should be in assembler...?)
 */
#define Index_Invalidate_I               0x0         /* 0       0 */
#define Index_Writeback_Inv_D            0x1         /* 0       1 */
#define Index_Invalidate_SI              0x2         /* 0       2 */
#define Index_Writeback_Inv_SD           0x3         /* 0       3 */
#define Index_Load_Tag_I                 0x4         /* 1       0 */
#define Index_Load_Tag_D                 0x5         /* 1       1 */
#define Index_Load_Tag_SI                0x6         /* 1       2 */
#define Index_Load_Tag_SD                0x7         /* 1       3 */
#define Index_Store_Tag_I                0x8         /* 2       0 */
#define Index_Store_Tag_D                0x9         /* 2       1 */
#define Index_Store_Tag_SI               0xA         /* 2       2 */
#define Index_Store_Tag_SD               0xB         /* 2       3 */
#define Create_Dirty_Exc_D               0xD         /* 3       1 */
#define Create_Dirty_Exc_SD              0xF         /* 3       3 */
#define Hit_Invalidate_I                 0x10        /* 4       0 */
#define Hit_Invalidate_D                 0x11        /* 4       1 */
#define Hit_Invalidate_SI                0x12        /* 4       2 */
#define Hit_Invalidate_SD                0x13        /* 4       3 */
#define Hit_Writeback_Inv_D              0x15        /* 5       1 */
#define Hit_Writeback_Inv_SD             0x17        /* 5       3 */
#define Fill_I                           0x14        /* 5       0 */
#define Hit_Writeback_D                  0x19        /* 6       1 */
#define Hit_Writeback_SD                 0x1B        /* 6       3 */
#define Hit_Writeback_I                  0x18        /* 6       0 */
#define Hit_Set_Virtual_SI               0x1E        /* 7       2 */
#define Hit_Set_Virtual_SD               0x1F        /* 7       3 */

/* Disabled by chris -- horrible overload of common word.
#ifndef WAIT
#define WAIT .word 0x42000020
#endif
*/
/* Disabled by joel -- horrible overload of common word.
#ifndef wait
#define wait .word 0x42000020
#endif wait
*/

#endif

#if  __mips == 3
/* R4000 configuration register definitions */
#define CFG_CM      0x80000000  /* Master-Checker mode */
#define CFG_ECMASK  0x70000000  /* System Clock Ratio */
#define CFG_ECBY2   0x00000000  /* divide by 2 */
#define CFG_ECBY3   0x10000000  /* divide by 3 */
#define CFG_ECBY4   0x20000000  /* divide by 4 */
#define CFG_EPMASK  0x0f000000  /* Transmit data pattern */
#define CFG_EPD     0x00000000  /* D */
#define CFG_EPDDX   0x01000000  /* DDX */
#define CFG_EPDDXX  0x02000000  /* DDXX */
#define CFG_EPDXDX  0x03000000  /* DXDX */
#define CFG_EPDDXXX 0x04000000  /* DDXXX */
#define CFG_EPDDXXXX    0x05000000  /* DDXXXX */
#define CFG_EPDXXDXX    0x06000000  /* DXXDXX */
#define CFG_EPDDXXXXX   0x07000000  /* DDXXXXX */
#define CFG_EPDXXXDXXX  0x08000000  /* DXXXDXXX */
#define CFG_SBMASK  0x00c00000  /* Secondary cache block size */
#define CFG_SBSHIFT 22
#define CFG_SB4     0x00000000  /* 4 words */
#define CFG_SB8     0x00400000  /* 8 words */
#define CFG_SB16    0x00800000  /* 16 words */
#define CFG_SB32    0x00c00000  /* 32 words */
#define CFG_SS      0x00200000  /* Split secondary cache */
#define CFG_SW      0x00100000  /* Secondary cache port width */
#define CFG_EWMASK  0x000c0000  /* System port width */
#define CFG_EWSHIFT 18
#define CFG_EW64    0x00000000  /* 64 bit */
#define CFG_EW32    0x00010000  /* 32 bit */
#define CFG_SC      0x00020000  /* Secondary cache absent */
#define CFG_SM      0x00010000  /* Dirty Shared mode disabled */
#define CFG_BE      0x00008000  /* Big Endian */
#define CFG_EM      0x00004000  /* ECC mode enable */
#define CFG_EB      0x00002000  /* Block ordering */
#define CFG_ICMASK  0x00000e00  /* Instruction cache size */
#define CFG_ICSHIFT 9
#define CFG_DCMASK  0x000001c0  /* Data cache size */
#define CFG_DCSHIFT 6
#define CFG_IB      0x00000020  /* Instruction cache block size */
#define CFG_DB      0x00000010  /* Data cache block size */
#define CFG_CU      0x00000008  /* Update on Store Conditional */
#define CFG_K0MASK  0x00000007  /* KSEG0 coherency algorithm */

/*
 * R4000 primary cache mode
 */
#define CFG_C_UNCACHED      2
#define CFG_C_NONCOHERENT   3
#define CFG_C_COHERENTXCL   4
#define CFG_C_COHERENTXCLW  5
#define CFG_C_COHERENTUPD   6

/*
 * R4000 cache operations (should be in assembler...?)
 */
#define Index_Invalidate_I               0x0         /* 0       0 */
#define Index_Writeback_Inv_D            0x1         /* 0       1 */
#define Index_Invalidate_SI              0x2         /* 0       2 */
#define Index_Writeback_Inv_SD           0x3         /* 0       3 */
#define Index_Load_Tag_I                 0x4         /* 1       0 */
#define Index_Load_Tag_D                 0x5         /* 1       1 */
#define Index_Load_Tag_SI                0x6         /* 1       2 */
#define Index_Load_Tag_SD                0x7         /* 1       3 */
#define Index_Store_Tag_I                0x8         /* 2       0 */
#define Index_Store_Tag_D                0x9         /* 2       1 */
#define Index_Store_Tag_SI               0xA         /* 2       2 */
#define Index_Store_Tag_SD               0xB         /* 2       3 */
#define Create_Dirty_Exc_D               0xD         /* 3       1 */
#define Create_Dirty_Exc_SD              0xF         /* 3       3 */
#define Hit_Invalidate_I                 0x10        /* 4       0 */
#define Hit_Invalidate_D                 0x11        /* 4       1 */
#define Hit_Invalidate_SI                0x12        /* 4       2 */
#define Hit_Invalidate_SD                0x13        /* 4       3 */
#define Hit_Writeback_Inv_D              0x15        /* 5       1 */
#define Hit_Writeback_Inv_SD             0x17        /* 5       3 */
#define Fill_I                           0x14        /* 5       0 */
#define Hit_Writeback_D                  0x19        /* 6       1 */
#define Hit_Writeback_SD                 0x1B        /* 6       3 */
#define Hit_Writeback_I                  0x18        /* 6       0 */
#define Hit_Set_Virtual_SI               0x1E        /* 7       2 */
#define Hit_Set_Virtual_SD               0x1F        /* 7       3 */

/* Disabled by chris -- horrible overload of common word.
#ifndef WAIT
#define WAIT .word 0x42000020
#endif
*/
/* Disabled by joel -- horrible overload of common word.
#ifndef wait
#define wait .word 0x42000020
#endif wait
*/

#endif

/*
** TLB resource defines
*/
#if  __mips == 1
#define N_TLB_ENTRIES   64
#define TLB_PGSIZE  0x1000
#define RANDBASE    8
#define TLBLO_PFNMASK   0xfffff000
#define TLBLO_PFNSHIFT  12
#define TLBLO_N     0x800   /* non-cacheable */
#define TLBLO_D     0x400   /* writeable */
#define TLBLO_V     0x200   /* valid bit */
#define TLBLO_G     0x100   /* global access bit */

#define TLBHI_VPNMASK   0xfffff000
#define TLBHI_VPNSHIFT  12
#define TLBHI_PIDMASK   0xfc0
#define TLBHI_PIDSHIFT  6
#define TLBHI_NPID  64

#define TLBINX_PROBE    0x80000000
#define TLBINX_INXMASK  0x00003f00
#define TLBINX_INXSHIFT 8

#define TLBRAND_RANDMASK    0x00003f00
#define TLBRAND_RANDSHIFT   8

#define TLBCTXT_BASEMASK    0xffe00000
#define TLBCTXT_BASESHIFT   21

#define TLBCTXT_VPNMASK     0x001ffffc
#define TLBCTXT_VPNSHIFT    2
#endif
#if  __mips == 3
#define N_TLB_ENTRIES   48

#define TLBHI_VPN2MASK  0xffffe000
#define TLBHI_PIDMASK   0x000000ff
#define TLBHI_NPID  256

#define TLBLO_PFNMASK   0x3fffffc0
#define TLBLO_PFNSHIFT  6
#define TLBLO_D     0x00000004  /* writeable */
#define TLBLO_V     0x00000002  /* valid bit */
#define TLBLO_G     0x00000001  /* global access bit */
#define TLBLO_CMASK 0x00000038  /* cache algorithm mask */
#define TLBLO_CSHIFT    3

#define TLBLO_UNCACHED      (CFG_C_UNCACHED<<TLBLO_CSHIFT)
#define TLBLO_NONCOHERENT   (CFG_C_NONCOHERENT<<TLBLO_CSHIFT)
#define TLBLO_COHERENTXCL   (CFG_C_COHERENTXCL<<TLBLO_CSHIFT)
#define TLBLO_COHERENTXCLW  (CFG_C_COHERENTXCLW<<TLBLO_CSHIFT)
#define TLBLO_COHERENTUPD   (CFG_C_COHERENTUPD<<TLBLO_CSHIFT)

#define TLBINX_PROBE    0x80000000
#define TLBINX_INXMASK  0x0000003f

#define TLBRAND_RANDMASK    0x0000003f

#define TLBCTXT_BASEMASK    0xff800000
#define TLBCTXT_BASESHIFT   23

#define TLBCTXT_VPN2MASK    0x007ffff0
#define TLBCTXT_VPN2SHIFT   4

#define TLBPGMASK_MASK      0x01ffe000
#endif

#if  __mips == 32
#define N_TLB_ENTRIES   16

#define TLBHI_VPN2MASK  0xffffe000
#define TLBHI_PIDMASK   0x000000ff
#define TLBHI_NPID  256

#define TLBLO_PFNMASK   0x3fffffc0
#define TLBLO_PFNSHIFT  6
#define TLBLO_D     0x00000004  /* writeable */
#define TLBLO_V     0x00000002  /* valid bit */
#define TLBLO_G     0x00000001  /* global access bit */
#define TLBLO_CMASK 0x00000038  /* cache algorithm mask */
#define TLBLO_CSHIFT    3

#define TLBLO_UNCACHED      (CFG_C_UNCACHED<<TLBLO_CSHIFT)
#define TLBLO_NONCOHERENT   (CFG_C_NONCOHERENT<<TLBLO_CSHIFT)
#define TLBLO_COHERENTXCL   (CFG_C_COHERENTXCL<<TLBLO_CSHIFT)
#define TLBLO_COHERENTXCLW  (CFG_C_COHERENTXCLW<<TLBLO_CSHIFT)
#define TLBLO_COHERENTUPD   (CFG_C_COHERENTUPD<<TLBLO_CSHIFT)

#define TLBINX_PROBE    0x80000000
#define TLBINX_INXMASK  0x0000003f

#define TLBRAND_RANDMASK    0x0000003f

#define TLBCTXT_BASEMASK    0xff800000
#define TLBCTXT_BASESHIFT   23

#define TLBCTXT_VPN2MASK    0x007ffff0
#define TLBCTXT_VPN2SHIFT   4

#define TLBPGMASK_MASK      0x01ffe000
#endif

#if  __mips == 1


/* definitions for Debug and Cache Invalidate control (DCIC) register bits */
#define DCIC_TR     0x80000000  /* Trap enable */
#define DCIC_UD     0x40000000  /* User debug enable */
#define DCIC_KD     0x20000000  /* Kernel debug enable */
#define DCIC_TE     0x10000000  /* Trace enable */
#define DCIC_DW     0x08000000  /* Enable data breakpoints on write */
#define DCIC_DR     0x04000000  /* Enable data breakpoints on read */
#define DCIC_DAE    0x02000000  /* Enable data addresss breakpoints */
#define DCIC_PCE    0x01000000  /* Enable instruction breakpoints */
#define DCIC_DE     0x00800000  /* Debug enable */
#define DCIC_DL     0x00008000  /* Data cache line invalidate */
#define DCIC_IL     0x00004000  /* Instruction cache line invalidate */
#define DCIC_D      0x00002000  /* Data cache invalidate enable */
#define DCIC_I      0x00001000  /* Instr. cache invalidate enable */
#define DCIC_T      0x00000020  /* Trace, set by CPU */
#define DCIC_W      0x00000010  /* Write reference, set by CPU */
#define DCIC_R      0x00000008  /* Read reference, set by CPU */
#define DCIC_DA     0x00000004  /* Data address, set by CPU */
#define DCIC_PC     0x00000002  /* Program counter, set by CPU */
#define DCIC_DB     0x00000001  /* Debug, set by CPU */


#define SR_CUMASK   0xf0000000  /* coproc usable bits */
#define SR_CU3      0x80000000  /* Coprocessor 3 usable */
#define SR_CU2      0x40000000  /* Coprocessor 2 usable */
#define SR_CU1      0x20000000  /* Coprocessor 1 usable */
#define SR_CU0      0x10000000  /* Coprocessor 0 usable */

#define SR_BEV      0x00400000  /* use boot exception vectors */

/* Cache control bits */
#define SR_TS       0x00200000  /* TLB shutdown */
#define SR_PE       0x00100000  /* cache parity error */
#define SR_CM       0x00080000  /* cache miss */
#define SR_PZ       0x00040000  /* cache parity zero */
#define SR_SWC      0x00020000  /* swap cache */
#define SR_ISC      0x00010000  /* Isolate data cache */

/*
**  status register interrupt masks and bits
*/

#define SR_IMASK    0x0000ff00  /* Interrupt mask */
#define SR_IMASK8   0x00000000  /* mask level 8 */
#define SR_IMASK7   0x00008000  /* mask level 7 */
#define SR_IMASK6   0x0000c000  /* mask level 6 */
#define SR_IMASK5   0x0000e000  /* mask level 5 */
#define SR_IMASK4   0x0000f000  /* mask level 4 */
#define SR_IMASK3   0x0000f800  /* mask level 3 */
#define SR_IMASK2   0x0000fc00  /* mask level 2 */
#define SR_IMASK1   0x0000fe00  /* mask level 1 */
#define SR_IMASK0   0x0000ff00  /* mask level 0 */

#define SR_IMASKSHIFT   8

#define SR_IBIT8    0x00008000  /* bit level 8 */
#define SR_IBIT7    0x00004000  /* bit level 7 */
#define SR_IBIT6    0x00002000  /* bit level 6 */
#define SR_IBIT5    0x00001000  /* bit level 5 */
#define SR_IBIT4    0x00000800  /* bit level 4 */
#define SR_IBIT3    0x00000400  /* bit level 3 */
#define SR_IBIT2    0x00000200  /* bit level 2 */
#define SR_IBIT1    0x00000100  /* bit level 1 */

#define SR_KUO      0x00000020  /* old kernel/user, 0 => k, 1 => u */
#define SR_IEO      0x00000010  /* old interrupt enable, 1 => enable */
#define SR_KUP      0x00000008  /* prev kernel/user, 0 => k, 1 => u */
#define SR_IEP      0x00000004  /* prev interrupt enable, 1 => enable */
#define SR_KUC      0x00000002  /* cur kernel/user, 0 => k, 1 => u */
#define SR_IEC      0x00000001  /* cur interrupt enable, 1 => enable */
#endif

#if  __mips == 3
#define SR_CUMASK   0xf0000000  /* coproc usable bits */
#define SR_CU3      0x80000000  /* Coprocessor 3 usable */
#define SR_CU2      0x40000000  /* Coprocessor 2 usable */
#define SR_CU1      0x20000000  /* Coprocessor 1 usable */
#define SR_CU0      0x10000000  /* Coprocessor 0 usable */

#define SR_RP       0x08000000      /* Reduced power operation */
#define SR_FR       0x04000000  /* Additional floating point registers */
#define SR_RE       0x02000000  /* Reverse endian in user mode */

#define SR_BEV      0x00400000  /* Use boot exception vectors */
#define SR_TS       0x00200000  /* TLB shutdown */
#define SR_SR       0x00100000  /* Soft reset */
#define SR_CH       0x00040000  /* Cache hit */
#define SR_CE       0x00020000  /* Use cache ECC  */
#define SR_DE       0x00010000  /* Disable cache exceptions */

/*
**  status register interrupt masks and bits
*/

#define SR_IMASK    0x0000ff00  /* Interrupt mask */
#define SR_IMASK8   0x00000000  /* mask level 8 */
#define SR_IMASK7   0x00008000  /* mask level 7 */
#define SR_IMASK6   0x0000c000  /* mask level 6 */
#define SR_IMASK5   0x0000e000  /* mask level 5 */
#define SR_IMASK4   0x0000f000  /* mask level 4 */
#define SR_IMASK3   0x0000f800  /* mask level 3 */
#define SR_IMASK2   0x0000fc00  /* mask level 2 */
#define SR_IMASK1   0x0000fe00  /* mask level 1 */
#define SR_IMASK0   0x0000ff00  /* mask level 0 */

#define SR_IMASKSHIFT   8

#define SR_IBIT8    0x00008000  /* bit level 8 */
#define SR_IBIT7    0x00004000  /* bit level 7 */
#define SR_IBIT6    0x00002000  /* bit level 6 */
#define SR_IBIT5    0x00001000  /* bit level 5 */
#define SR_IBIT4    0x00000800  /* bit level 4 */
#define SR_IBIT3    0x00000400  /* bit level 3 */
#define SR_IBIT2    0x00000200  /* bit level 2 */
#define SR_IBIT1    0x00000100  /* bit level 1 */

#define SR_KSMASK   0x00000018  /* Kernel mode mask */
#define SR_KSUSER   0x00000010  /* User mode */
#define SR_KSSUPER  0x00000008  /* Supervisor mode */
#define SR_KSKERNEL 0x00000000  /* Kernel mode */
#define SR_ERL      0x00000004  /* Error level */
#define SR_EXL      0x00000002  /* Exception level */
#define SR_IE       0x00000001  /* Interrupts enabled */
#endif

#if  __mips == 32
#define SR_CUMASK   0xf0000000  /* coproc usable bits */
#define SR_CU3      0x80000000  /* Coprocessor 3 usable */
#define SR_CU2      0x40000000  /* Coprocessor 2 usable */
#define SR_CU1      0x20000000  /* Coprocessor 1 usable */
#define SR_CU0      0x10000000  /* Coprocessor 0 usable */

#define SR_RP       0x08000000      /* Reduced power operation */
#define SR_FR       0x04000000  /* Additional floating point registers */
#define SR_RE       0x02000000  /* Reverse endian in user mode */

#define SR_BEV      0x00400000  /* Use boot exception vectors */
#define SR_TS       0x00200000  /* TLB shutdown */
#define SR_SR       0x00100000  /* Soft reset */
#define SR_CH       0x00040000  /* Cache hit */
#define SR_CE       0x00020000  /* Use cache ECC  */
#define SR_DE       0x00010000  /* Disable cache exceptions */

/*
**  status register interrupt masks and bits
*/

#define SR_IMASK    0x0000ff00  /* Interrupt mask */
#define SR_IMASK8   0x00000000  /* mask level 8 */
#define SR_IMASK7   0x00008000  /* mask level 7 */
#define SR_IMASK6   0x0000c000  /* mask level 6 */
#define SR_IMASK5   0x0000e000  /* mask level 5 */
#define SR_IMASK4   0x0000f000  /* mask level 4 */
#define SR_IMASK3   0x0000f800  /* mask level 3 */
#define SR_IMASK2   0x0000fc00  /* mask level 2 */
#define SR_IMASK1   0x0000fe00  /* mask level 1 */
#define SR_IMASK0   0x0000ff00  /* mask level 0 */

#define SR_IMASKSHIFT   8

#define SR_IBIT8    0x00008000  /* bit level 8 */
#define SR_IBIT7    0x00004000  /* bit level 7 */
#define SR_IBIT6    0x00002000  /* bit level 6 */
#define SR_IBIT5    0x00001000  /* bit level 5 */
#define SR_IBIT4    0x00000800  /* bit level 4 */
#define SR_IBIT3    0x00000400  /* bit level 3 */
#define SR_IBIT2    0x00000200  /* bit level 2 */
#define SR_IBIT1    0x00000100  /* bit level 1 */

#define SR_KSMASK   0x00000018  /* Kernel mode mask */
#define SR_KSUSER   0x00000010  /* User mode */
#define SR_KSSUPER  0x00000008  /* Supervisor mode */
#define SR_KSKERNEL 0x00000000  /* Kernel mode */
#define SR_ERL      0x00000004  /* Error level */
#define SR_EXL      0x00000002  /* Exception level */
#define SR_IE       0x00000001  /* Interrupts enabled */
#endif

/*
 * Cause Register
 */
#define CAUSE_BD    0x80000000  /* Branch delay slot */
#define CAUSE_BT    0x40000000  /* Branch Taken */
#define CAUSE_CEMASK    0x30000000  /* coprocessor error */
#define CAUSE_CESHIFT   28


#define CAUSE_IPMASK    0x0000FF00  /* Pending interrupt mask */
#define CAUSE_IPSHIFT   8

#define CAUSE_EXCMASK   0x0000003C  /* Cause code bits */
#define CAUSE_EXCSHIFT  2

#ifndef XDS
/*
**  Coprocessor 0 registers
*/
#define C0_INX      $0      /* tlb index */
#define C0_RAND     $1      /* tlb random */
#if  __mips == 1
#define C0_TLBLO    $2      /* tlb entry low */
#endif
#if  __mips == 3
#define C0_TLBLO0   $2      /* tlb entry low 0 */
#define C0_TLBLO1   $3      /* tlb entry low 1 */
#endif

#if  __mips == 32
#define C0_TLBLO0   $2      /* tlb entry low 0 */
#define C0_TLBLO1   $3      /* tlb entry low 1 */
#endif


#define C0_CTXT     $4      /* tlb context */

#if  __mips == 3
#define C0_PAGEMASK $5      /* tlb page mask */
#define C0_WIRED    $6      /* number of wired tlb entries */
#endif

#if  __mips == 32
#define C0_PAGEMASK $5      /* tlb page mask */
#define C0_WIRED    $6      /* number of wired tlb entries */
#endif

#if  __mips == 1
#define C0_TAR          $6
#endif

#define C0_BADVADDR $8      /* bad virtual address */

#if  __mips == 3
#define C0_COUNT    $9      /* cycle count */
#endif
#if  __mips == 32
#define C0_COUNT    $9      /* cycle count */
#endif

#define C0_TLBHI    $10     /* tlb entry hi */

#if  __mips == 3
#define C0_COMPARE  $11     /* cyccle count comparator  */
#endif

#if  __mips == 32
#define C0_COMPARE  $11     /* cyccle count comparator  */
#endif

#define C0_SR       $12     /* status register */
#define C0_CAUSE    $13     /* exception cause */
#define C0_EPC      $14     /* exception pc */
#define C0_PRID     $15     /* revision identifier */

#if  __mips == 1
#define C0_CONFIG   $3     /* configuration register R3081*/
#endif

#if  __mips == 3
#define C0_CONFIG   $16     /* configuration register */
#define C0_LLADDR   $17     /* linked load address */
#define C0_WATCHLO  $18     /* watchpoint trap register */
#define C0_WATCHHI  $19     /* watchpoint trap register */
#define C0_XCTXT    $20     /* extended tlb context */
#define C0_ECC      $26     /* secondary cache ECC control */
#define C0_CACHEERR $27     /* cache error status */
#define C0_TAGLO    $28     /* cache tag lo */
#define C0_TAGHI    $29     /* cache tag hi */
#define C0_ERRPC    $30     /* cache error pc */
#endif

#if  __mips == 32
#define C0_CONFIG   $16     /* configuration register */
#define C0_LLADDR   $17     /* linked load address */
#define C0_WATCHLO  $18     /* watchpoint trap register */
#define C0_WATCHHI  $19     /* watchpoint trap register */
#define C0_XCTXT    $20     /* extended tlb context */
#define C0_ECC      $26     /* secondary cache ECC control */
#define C0_CACHEERR $27     /* cache error status */
#define C0_TAGLO    $28     /* cache tag lo */
#define C0_TAGHI    $29     /* cache tag hi */
#define C0_ERRPC    $30     /* cache error pc */
#endif


#define C1_REVISION     $0
#define C1_STATUS       $31

#endif /* XDS */

#ifdef R4650
#define IWATCH $18
#define DWATCH $19
#define IBASE  $0
#define IBOUND $1
#define DBASE  $2
#define DBOUND $3
#define CALG    $17
#endif

#endif /* _RTEMS_MIPS_IDTCPU_H */