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Annotation of researchv9/sys/sun3/buserr.h, revision 1.1

1.1     ! root        1: /*     @(#)buserr.h 1.1 86/02/03 SMI   */
        !             2: 
        !             3: /*
        !             4:  * Copyright (c) 1985 by Sun Microsystems, Inc.
        !             5:  */
        !             6: 
        !             7: /*
        !             8:  * Definitions and structures related to 68020 bus error handling for Sun-3.
        !             9:  */
        !            10: 
        !            11: #ifndef _BUSERR_
        !            12: #define        _BUSERR_
        !            13: #ifndef LOCORE
        !            14: /*
        !            15:  * Auxiliary information stacked by hardware on Bus Error or Address Error.
        !            16:  */
        !            17: 
        !            18: /*
        !            19:  * 68010/68020 "type 0" normal four word stack.
        !            20:  */
        !            21: #define        SF_NORMAL       0x0
        !            22: 
        !            23: /*
        !            24:  * 68020 "type 1" throwaway four word stack.
        !            25:  */
        !            26: #define        SF_THROWAWAY    0x1
        !            27: 
        !            28: /*
        !            29:  * 68020 "type 2" normal six word stack frame.
        !            30:  */
        !            31: #define        SF_NORMAL6      0x2
        !            32: struct bei_normal6 {
        !            33:        int     bei_pc;         /* pc where error occurred */
        !            34: };
        !            35: 
        !            36: /*
        !            37:  * 68020 "type 9" co-processor mid-instruction exception stack frame.
        !            38:  */
        !            39: #define        SF_COPROC       0x9
        !            40: struct bei_coproc {
        !            41:        int     bei_pc;         /* pc where error occured */
        !            42:        int     bei_internal;   /* an internal register */
        !            43:        int     bei_eea;        /* evaluated effective address */
        !            44: };
        !            45: 
        !            46: /*
        !            47:  * 68020 "type A" medium bus cycle fault stack frame.
        !            48:  */
        !            49: #define        SF_MEDIUM       0xA
        !            50: struct bei_medium {
        !            51:        short   bei_internal;   /* an internal register */
        !            52:        u_int   bei_faultc: 1;  /* fault on stage c of instruction pipe */
        !            53:        u_int   bei_faultb: 1;  /* fault on stage b of instruction pipe */
        !            54:        u_int   bei_rerunc: 1;  /* rerun stage c */
        !            55:        u_int   bei_rerunb: 1;  /* rerun stage b */
        !            56:        u_int             : 3;
        !            57:        u_int   bei_dfault: 1;  /* fault/rerun on data */
        !            58:        u_int   bei_rmw   : 1;  /* read/modify/write */
        !            59:        u_int   bei_rw    : 1;  /* read=1,write=0 */
        !            60:        u_int   bei_size  : 2;  /* size code for data cycle */
        !            61:        u_int             : 1;
        !            62:        u_int   bei_fcode : 3;  /* function code */
        !            63:        short   bei_ipsc;       /* instruction pipe stage c */
        !            64:        short   bei_ipsb;       /* instruction pipe stage b */
        !            65:        int     bei_fault;      /* fault address */
        !            66:        int     bei_internal2;  /* another internal register */
        !            67:        int     bei_dob;        /* data output buffer */
        !            68:        int     bei_internal3;  /* yet another internal register */
        !            69: };
        !            70: 
        !            71: /*
        !            72:  * 68020 "type B" long bus cycle fault stack frame.
        !            73:  */
        !            74: #define        SF_LONGB        0xB
        !            75: struct bei_longb {
        !            76:        short   bei_internal;   /* an internal register */
        !            77:        u_int   bei_faultc: 1;  /* fault on stage c of instruction pipe */
        !            78:        u_int   bei_faultb: 1;  /* fault on stage b of instruction pipe */
        !            79:        u_int   bei_rerunc: 1;  /* rerun stage c */
        !            80:        u_int   bei_rerunb: 1;  /* rerun stage b */
        !            81:        u_int             : 3;
        !            82:        u_int   bei_dfault: 1;  /* fault/rerun on data */
        !            83:        u_int   bei_rmw   : 1;  /* read/modify/write */
        !            84:        u_int   bei_rw    : 1;  /* read=1,write=0 */
        !            85:        u_int   bei_size  : 2;  /* size code for data cycle */
        !            86:        u_int             : 1;
        !            87:        u_int   bei_fcode : 3;  /* function code */
        !            88:        short   bei_ipsc;       /* instruction pipe stage c */
        !            89:        short   bei_ipsb;       /* instruction pipe stage b */
        !            90:        int     bei_fault;      /* fault address */
        !            91:        int     bei_internal2;  /* another internal register */
        !            92:        int     bei_dob;        /* data output buffer */
        !            93:        int     bei_internal3;  /* yet another internal register */
        !            94:        int     bei_internal4;  /* yet another internal register */
        !            95:        int     bei_stageb;     /* stage B address */
        !            96:        int     bei_internal5;  /* yet another internal register */
        !            97:        int     bei_dib;        /* data input buffer */
        !            98:        int     bei_internal6[11];/* more internal registers */
        !            99: };
        !           100: #endif !LOCORE
        !           101: 
        !           102: /*
        !           103:  * The System Bus Error Register captures the state of the
        !           104:  * system as of the last bus error.  The Bus Error Register
        !           105:  * always latches the cause of the most recent bus error.
        !           106:  * Thus, in the case of stacked bus errors, the information
        !           107:  * relating to the earlier bus errors is lost.  The Bus Error
        !           108:  * register is read-only and is addressed in FC_MAP space.
        !           109:  * The Bus Error Register is clocked for bus errors for CPU Cycles
        !           110:  * line.  The Bus Error Register is not clocked for DVMA cycles
        !           111:  * or for CPU accesses to the floating point chip with the
        !           112:  * chip not enabled.
        !           113:  *
        !           114:  * The be_proterr bit is set only if the valid bit was set AND the
        !           115:  * page protection does not allow the kind of operation attempted.
        !           116:  * The rest of the bits are 1 if they caused the error.
        !           117:  */
        !           118: #ifndef LOCORE
        !           119: struct buserrorreg {
        !           120:        u_int   be_invalid      :1;     /* Page map Valid bit was off */
        !           121:        u_int   be_proterr      :1;     /* Protection error */
        !           122:        u_int   be_timeout      :1;     /* Bus access timed out */
        !           123:        u_int   be_vmeberr      :1;     /* VMEbus bus error */
        !           124:        u_int   be_fpaberr      :1;     /* FPA bus error */
        !           125:        u_int   be_fpaena       :1;     /* FPA enable error */
        !           126:        u_int                   :1;
        !           127:        u_int   be_watchdog     :1;     /* Watchdog reset */
        !           128: };
        !           129: #endif !LOCORE
        !           130: 
        !           131: /*
        !           132:  * Equivalent bits.
        !           133:  */
        !           134: #define        BE_INVALID      0x80            /* page map was invalid */
        !           135: #define        BE_PROTERR      0x40            /* protection error */
        !           136: #define        BE_TIMEOUT      0x20            /* bus access timed out */
        !           137: #define        BE_VMEBERR      0x10            /* VMEbus bus error */
        !           138: #define        BE_FPABERR      0x08            /* FPA bus error */
        !           139: #define        BE_FPAENA       0x04            /* FPA enable error */
        !           140: #define        BE_WATCHDOG     0x01            /* Watchdog reset */
        !           141: 
        !           142: #define        BUSERRREG       0x60000000      /* addr of buserr reg in FC_MAP space */
        !           143: 
        !           144: #define BUSERR_BITS    "\20\10INVALID\7PROTERR\6TIMEOUT\5VMEBERR\4FPABERR\3FPAENA\1WATCHDOG"
        !           145: #endif !_BUSERR_

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