vectors.s

完整的Bell实验室的嵌入式文件系统TFS

    .file   "vectors.s"

#include "asm68k.h"

/*****************************************************************************
 *
 * buserr & adderr:
 * Bus & Address error generate more information on the supervisor stack.
 * This information is stored in global variables and control is transferred
 * to exception().
 * Supporting text in MC68000 processor book...
 *  pgs 90-94, 302-303, 315-317 
 */
    .text
    .global buserr
buserr:
    mov.b   &2,d0               /* regD0 = 2, bus error. */
    jmp busaddmore

    .global adderr
adderr:
    mov.b   &3,d0               /* regD0 = 3, address error. */
    jmp busaddmore

    .global busaddmore
busaddmore:
    and.l   &0xff,d0            /* Store vector number (low 8 bits only). */
    mov.l   d0,(regtbl+D0)  
    mov.w   (a7),d0
    mov.l   d0,(regtbl+A0)  /* regA0: status information word. */
    mov.w   2(a7),d0
    mov.l   d0,(regtbl+A1)  /* regA1: access address high. */
    mov.w   4(a7),d0
    mov.l   d0,(regtbl+A2)  /* regA2: access address low. */
    mov.w   6(a7),d0
    mov.l   d0,(regtbl+A3)  /* regA3: instruction register. */
    mov.w   8(a7),d0
    mov.w   d0,(regtbl+SR)  /* regSR: status register. */
    mov.l   10(a7),d0
    mov.l   d0,(regtbl+PC)  /* regPC: program counter. */
    jsr exception               /* Go to C. */

/*****************************************************************************
 #
 # Other vectors:
 # The code beginning at vbase is used by execption.c as a table of
 # vector handlers where the size of each member is "vnext - vbase".
 # This scheme keeps the C-code that initializes the vector handlers to
 # a minimum ; but still provides full-and-unique coverage of every
 # possible exception on the 68k family.
 # THe function gotoexception is used to stuff values into regtbl[] for
 # use by the general purpose exception() function.
 */
    .global gotoexception
gotoexception:
    mov.w   &0x0700,sr
    mov.l   a0,(regtbl+A0)
    mov.l   a1,(regtbl+A1)
    mov.l   a2,(regtbl+A2)
    mov.l   a3,(regtbl+A3)
    mov.l   a4,(regtbl+A4)
    mov.l   a5,(regtbl+A5)
    mov.l   a6,(regtbl+A6)
    mov.l   d0,(regtbl+D0)
    mov.l   d1,(regtbl+D1)
    mov.l   d2,(regtbl+D2)
    mov.l   d3,(regtbl+D3)
    mov.l   d4,(regtbl+D4)
    mov.l   d5,(regtbl+D5)
    mov.l   d6,(regtbl+D6)
    mov.l   d7,(regtbl+D7)
    mov.l   sp,(regtbl+SS)
    mov.w   (sp),a0
    mov.l   a0,(regtbl+SR)
    mov.l   2(a7),a0
    mov.l   a0,(regtbl+PC)
    mov.l   usp,a0
    mov.l   a0,(regtbl+US)
    jsr exception   


/*****************************************************************************/

    .global vbase, vnext, vbase128, vnext128
vbase:
    mov.b   &2,d0
    jmp gotoexception
vnext:
    mov.b   &3,d0
    jmp gotoexception
    mov.b   &4,d0
    jmp gotoexception
    mov.b   &5,d0
    jmp gotoexception
    mov.b   &6,d0
    jmp gotoexception
    mov.b   &7,d0
    jmp gotoexception
    mov.b   &8,d0
    jmp gotoexception
    mov.b   &9,d0
    jmp gotoexception
    mov.b   &10,d0
    jmp gotoexception
    mov.b   &11,d0
    jmp gotoexception
    mov.b   &12,d0
    jmp gotoexception
    mov.b   &13,d0
    jmp gotoexception
    mov.b   &14,d0
    jmp gotoexception
    mov.b   &15,d0
    jmp gotoexception
    mov.b   &16,d0
    jmp gotoexception
    mov.b   &17,d0
    jmp gotoexception
    mov.b   &18,d0
    jmp gotoexception
    mov.b   &19,d0
    jmp gotoexception
    mov.b   &20,d0
    jmp gotoexception
    mov.b   &21,d0
    jmp gotoexception
    mov.b   &22,d0
    jmp gotoexception
    mov.b   &23,d0
    jmp gotoexception
    mov.b   &24,d0
    jmp gotoexception
    mov.b   &25,d0
    jmp gotoexception
    mov.b   &26,d0
    jmp gotoexception
    mov.b   &27,d0
    jmp gotoexception
    mov.b   &28,d0
    jmp gotoexception
    mov.b   &29,d0
    jmp gotoexception
    mov.b   &30,d0
    jmp gotoexception
    mov.b   &31,d0
    jmp gotoexception
    mov.b   &32,d0
    jmp gotoexception
    mov.b   &33,d0
    jmp gotoexception
    mov.b   &34,d0
    jmp gotoexception
    mov.b   &35,d0
    jmp gotoexception
    mov.b   &36,d0
    jmp gotoexception
    mov.b   &37,d0
    jmp gotoexception
    mov.b   &38,d0
    jmp gotoexception
    mov.b   &39,d0
    jmp gotoexception
    mov.b   &40,d0
    jmp gotoexception
    mov.b   &41,d0
    jmp gotoexception
    mov.b   &42,d0
    jmp gotoexception
    mov.b   &43,d0
    jmp gotoexception
    mov.b   &44,d0
    jmp gotoexception
    mov.b   &45,d0
    jmp gotoexception
    mov.b   &46,d0
    jmp gotoexception
    mov.b   &47,d0
    jmp gotoexception
    mov.b   &48,d0
    jmp gotoexception
    mov.b   &49,d0
    jmp gotoexception
    mov.b   &50,d0
    jmp gotoexception
    mov.b   &51,d0
    jmp gotoexception
    mov.b   &52,d0
    jmp gotoexception
    mov.b   &53,d0
    jmp gotoexception
    mov.b   &54,d0
    jmp gotoexception
    mov.b   &55,d0
    jmp gotoexception
    mov.b   &56,d0
    jmp gotoexception
    mov.b   &57,d0
    jmp gotoexception
    mov.b   &58,d0
    jmp gotoexception
    mov.b   &59,d0
    jmp gotoexception
    mov.b   &60,d0
    jmp gotoexception
    mov.b   &61,d0
    jmp gotoexception
    mov.b   &62,d0
    jmp gotoexception
    mov.b   &63,d0
    jmp gotoexception
    mov.b   &64,d0
    jmp gotoexception
    mov.b   &65,d0
    jmp gotoexception
    mov.b   &66,d0
    jmp gotoexception
    mov.b   &67,d0
    jmp gotoexception
    mov.b   &68,d0
    jmp gotoexception
    mov.b   &69,d0
    jmp gotoexception
    mov.b   &70,d0
    jmp gotoexception
    mov.b   &71,d0
    jmp gotoexception
    mov.b   &72,d0
    jmp gotoexception
    mov.b   &73,d0
    jmp gotoexception
    mov.b   &74,d0
    jmp gotoexception
    mov.b   &75,d0
    jmp gotoexception
    mov.b   &76,d0
    jmp gotoexception
    mov.b   &77,d0
    jmp gotoexception
    mov.b   &78,d0
    jmp gotoexception
    mov.b   &79,d0
    jmp gotoexception
    mov.b   &80,d0
    jmp gotoexception
    mov.b   &81,d0
    jmp gotoexception
    mov.b   &82,d0
    jmp gotoexception
    mov.b   &83,d0
    jmp gotoexception
    mov.b   &84,d0
    jmp gotoexception
    mov.b   &85,d0
    jmp gotoexception
    mov.b   &86,d0
    jmp gotoexception
    mov.b   &87,d0
    jmp gotoexception
    mov.b   &88,d0
    jmp gotoexception
    mov.b   &89,d0
    jmp gotoexception
    mov.b   &90,d0
    jmp gotoexception
    mov.b   &91,d0
    jmp gotoexception
    mov.b   &92,d0
    jmp gotoexception
    mov.b   &93,d0
    jmp gotoexception
    mov.b   &94,d0
    jmp gotoexception
    mov.b   &95,d0
    jmp gotoexception
    mov.b   &96,d0
    jmp gotoexception
    mov.b   &97,d0
    jmp gotoexception
    mov.b   &98,d0
    jmp gotoexception
    mov.b   &99,d0
    jmp gotoexception
    mov.b   &100,d0
    jmp gotoexception
    mov.b   &101,d0
    jmp gotoexception
    mov.b   &102,d0
    jmp gotoexception
    mov.b   &103,d0
    jmp gotoexception
    mov.b   &104,d0
    jmp gotoexception
    mov.b   &105,d0
    jmp gotoexception
    mov.b   &106,d0
    jmp gotoexception
    mov.b   &107,d0
    jmp gotoexception
    mov.b   &108,d0
    jmp gotoexception
    mov.b   &109,d0
    jmp gotoexception
    mov.b   &110,d0
    jmp gotoexception
    mov.b   &111,d0
    jmp gotoexception
    mov.b   &112,d0
    jmp gotoexception
    mov.b   &113,d0
    jmp gotoexception
    mov.b   &114,d0
    jmp gotoexception
    mov.b   &115,d0
    jmp gotoexception
    mov.b   &116,d0
    jmp gotoexception
    mov.b   &117,d0
    jmp gotoexception
    mov.b   &118,d0
    jmp gotoexception
    mov.b   &119,d0
    jmp gotoexception
    mov.b   &120,d0
    jmp gotoexception
    mov.b   &121,d0
    jmp gotoexception
    mov.b   &122,d0
    jmp gotoexception
    mov.b   &123,d0
    jmp gotoexception
    mov.b   &124,d0
    jmp gotoexception
    mov.b   &125,d0
    jmp gotoexception
    mov.b   &126,d0
    jmp gotoexception
    mov.b   &127,d0
    jmp gotoexception
vbase128:
    mov.b   &128,d0
    jmp gotoexception
vnext128:
    mov.b   &129,d0
    jmp gotoexception
    mov.b   &130,d0
    jmp gotoexception
    mov.b   &131,d0
    jmp gotoexception
    mov.b   &132,d0
    jmp gotoexception
    mov.b   &133,d0
    jmp gotoexception
    mov.b   &134,d0
    jmp gotoexception
    mov.b   &135,d0
    jmp gotoexception
    mov.b   &136,d0
    jmp gotoexception
    mov.b   &137,d0
    jmp gotoexception
    mov.b   &138,d0
    jmp gotoexception
    mov.b   &139,d0
    jmp gotoexception
    mov.b   &140,d0
    jmp gotoexception
    mov.b   &141,d0
    jmp gotoexception
    mov.b   &142,d0
    jmp gotoexception
    mov.b   &143,d0
    jmp gotoexception
    mov.b   &144,d0
    jmp gotoexception
    mov.b   &145,d0
    jmp gotoexception
    mov.b   &146,d0
    jmp gotoexception
    mov.b   &147,d0
    jmp gotoexception
    mov.b   &148,d0
    jmp gotoexception
    mov.b   &149,d0
    jmp gotoexception
    mov.b   &150,d0
    jmp gotoexception
    mov.b   &151,d0
    jmp gotoexception
    mov.b   &152,d0
    jmp gotoexception
    mov.b   &153,d0
    jmp gotoexception
    mov.b   &154,d0
    jmp gotoexception
    mov.b   &155,d0
    jmp gotoexception
    mov.b   &156,d0
    jmp gotoexception
    mov.b   &157,d0
    jmp gotoexception
    mov.b   &158,d0
    jmp gotoexception
    mov.b   &159,d0
    jmp gotoexception
    mov.b   &160,d0
    jmp gotoexception
    mov.b   &161,d0
    jmp gotoexception
    mov.b   &162,d0
    jmp gotoexception
    mov.b   &163,d0
    jmp gotoexception
    mov.b   &164,d0
    jmp gotoexception
    mov.b   &165,d0
    jmp gotoexception
    mov.b   &166,d0
    jmp gotoexception
    mov.b   &167,d0
    jmp gotoexception
    mov.b   &168,d0
    jmp gotoexception
    mov.b   &169,d0
    jmp gotoexception
    mov.b   &170,d0
    jmp gotoexception
    mov.b   &171,d0
    jmp gotoexception
    mov.b   &172,d0
    jmp gotoexception
    mov.b   &173,d0
    jmp gotoexception
    mov.b   &174,d0
    jmp gotoexception
    mov.b   &175,d0
    jmp gotoexception
    mov.b   &176,d0
    jmp gotoexception
    mov.b   &177,d0
    jmp gotoexception
    mov.b   &178,d0
    jmp gotoexception
    mov.b   &179,d0
    jmp gotoexception
    mov.b   &180,d0
    jmp gotoexception
    mov.b   &181,d0
    jmp gotoexception
    mov.b   &182,d0
    jmp gotoexception
    mov.b   &183,d0
    jmp gotoexception
    mov.b   &184,d0
    jmp gotoexception
    mov.b   &185,d0
    jmp gotoexception
    mov.b   &186,d0
    jmp gotoexception
    mov.b   &187,d0
    jmp gotoexception
    mov.b   &188,d0
    jmp gotoexception
    mov.b   &189,d0
    jmp gotoexception
    mov.b   &190,d0
    jmp gotoexception
    mov.b   &191,d0
    jmp gotoexception
    mov.b   &192,d0
    jmp gotoexception
    mov.b   &193,d0
    jmp gotoexception
    mov.b   &194,d0
    jmp gotoexception
    mov.b   &195,d0
    jmp gotoexception
    mov.b   &196,d0
    jmp gotoexception
    mov.b   &197,d0
    jmp gotoexception
    mov.b   &198,d0
    jmp gotoexception
    mov.b   &199,d0
    jmp gotoexception
    mov.b   &200,d0
    jmp gotoexception
    mov.b   &201,d0
    jmp gotoexception
    mov.b   &202,d0
    jmp gotoexception
    mov.b   &203,d0
    jmp gotoexception
    mov.b   &204,d0
    jmp gotoexception
    mov.b   &205,d0
    jmp gotoexception
    mov.b   &206,d0
    jmp gotoexception
    mov.b   &207,d0
    jmp gotoexception
    mov.b   &208,d0
    jmp gotoexception
    mov.b   &209,d0
    jmp gotoexception
    mov.b   &210,d0
    jmp gotoexception
    mov.b   &211,d0
    jmp gotoexception
    mov.b   &212,d0
    jmp gotoexception
    mov.b   &213,d0
    jmp gotoexception
    mov.b   &214,d0
    jmp gotoexception
    mov.b   &215,d0
    jmp gotoexception
    mov.b   &216,d0
    jmp gotoexception
    mov.b   &217,d0
    jmp gotoexception
    mov.b   &218,d0
    jmp gotoexception
    mov.b   &219,d0
    jmp gotoexception
    mov.b   &220,d0
    jmp gotoexception
    mov.b   &221,d0
    jmp gotoexception
    mov.b   &222,d0
    jmp gotoexception
    mov.b   &223,d0
    jmp gotoexception
    mov.b   &224,d0
    jmp gotoexception
    mov.b   &225,d0
    jmp gotoexception
    mov.b   &226,d0
    jmp gotoexception
    mov.b   &227,d0
    jmp gotoexception
    mov.b   &228,d0
    jmp gotoexception
    mov.b   &229,d0
    jmp gotoexception
    mov.b   &230,d0
    jmp gotoexception
    mov.b   &231,d0
    jmp gotoexception
    mov.b   &232,d0
    jmp gotoexception
    mov.b   &233,d0
    jmp gotoexception
    mov.b   &234,d0
    jmp gotoexception
    mov.b   &235,d0
    jmp gotoexception
    mov.b   &236,d0
    jmp gotoexception
    mov.b   &237,d0
    jmp gotoexception
    mov.b   &238,d0
    jmp gotoexception
    mov.b   &239,d0
    jmp gotoexception
    mov.b   &240,d0
    jmp gotoexception
    mov.b   &241,d0
    jmp gotoexception
    mov.b   &242,d0
    jmp gotoexception
    mov.b   &243,d0
    jmp gotoexception
    mov.b   &244,d0
    jmp gotoexception
    mov.b   &245,d0
    jmp gotoexception
    mov.b   &246,d0
    jmp gotoexception
    mov.b   &247,d0
    jmp gotoexception
    mov.b   &248,d0
    jmp gotoexception
    mov.b   &249,d0
    jmp gotoexception
    mov.b   &250,d0
    jmp gotoexception
    mov.b   &251,d0
    jmp gotoexception
    mov.b   &252,d0
    jmp gotoexception
    mov.b   &253,d0
    jmp gotoexception
    mov.b   &254,d0
    jmp gotoexception
    mov.b   &255,d0
    jmp gotoexception