2.9BSD - /usr/src/sys/GENERIC/l.s

   1: /*
   2:  *	SCCS id	@(#)l.s	1.5 (Berkeley)	3/14/83
   3:  *
   4:  *	Low Core
   5:  *
   6:  */
   7: 
   8: #define         LOCORE
   9: #include        "whoami.h"              /* for localopts */
  10: #include        <sys/trap.h>
  11: #include        <sys/iopage.m>
  12: #include        <sys/koverlay.h>        /* for definition of OVLY_TABLE_BASE */
  13: 
  14: #include "dh.h"
  15: #include "dn.h"
  16: #include "dz.h"
  17: #include "hk.h"
  18: #include "hp.h"
  19: #include "hs.h"
  20: #include "ht.h"
  21: #include "kl.h"
  22: #include "lp.h"
  23: #include "rk.h"
  24: #include "rl.h"
  25: #include "rm.h"
  26: #include "rp.h"
  27: #include "tm.h"
  28: #include "ts.h"
  29: #include "vp.h"
  30: #include "xp.h"
  31: 
  32:         .globl  call, trap, buserr, start, _panic
  33: #ifdef  NONFP
  34:         .globl  instrap
  35: #else
  36: #	define        instrap         trap
  37: #endif
  38: #ifdef  MENLO_OVLY
  39:         .globl  emt
  40: #else
  41: #	define        emt             trap
  42: #endif
  43: #ifdef  UCB_AUTOBOOT
  44:         .globl  powrdown
  45: #else
  46: #	define        powrdown        trap
  47: #endif
  48: 
  49: #ifndef KERN_NONSEP
  50:         .data
  51: #endif
  52: 
  53: ZERO:
  54: 
  55: br4 = 200
  56: br5 = 240
  57: br6 = 300
  58: br7 = 340
  59: 
  60: . = ZERO+0
  61: #ifdef  KERN_NONSEP
  62:         /  If vectors at 110 and 444 are unused,
  63:         /  autoconfig will set these to something more reasonable.
  64:         /  On jump, this will branch to 112, which branches to 50.
  65:         /  On trap, will vector to 444, where a ZEROTRAP will be simulated.
  66:         42                              / illegal instruction if jump
  67:         777                             / trace trap at high priority if trap
  68: #else
  69:         trap; br7+ZEROTRAP.             / trap-to-zero trap
  70: #endif
  71: 
  72: / trap vectors
  73: . = ZERO+4
  74:         buserr; br7+BUSFLT.             / bus error
  75:         instrap; br7+INSTRAP.           / illegal instruction
  76:         trap; br7+BPTTRAP.              / bpt-trace trap
  77:         trap; br7+IOTTRAP.              / iot trap
  78:         powrdown; br7+POWRFAIL.         / power fail
  79:         emt; br7+EMTTRAP.               / emulator trap
  80:         start;br7+SYSCALL.              / system  (overlaid by 'syscall')
  81: 
  82: . = ZERO+40
  83: #ifdef  UCB_AUTOBOOT
  84: .globl  do_panic
  85:         jmp     do_panic
  86: #else
  87:         br      .
  88: #endif
  89: 
  90: .globl   dump
  91: . = ZERO+44
  92:         jmp     dump
  93: #ifdef  KERN_NONSEP
  94:         /  Handler for jump-to-zero panic.
  95: . = ZERO+50
  96:         mov     $zjmp, -(sp)
  97:         jsr     pc, _panic
  98: #endif
  99: 
 100: . = ZERO+60
 101:         klin; br4
 102:         klou; br4
 103: 
 104: . = ZERO+100
 105:         kwlp; br6
 106:         kwlp; br6
 107: 
 108: . = ZERO+114
 109:         trap; br7+PARITYFLT.            / 11/70 parity
 110:         trap; br7+SEGFLT.               / segmentation violation
 111: 
 112: #if     NRL > 0
 113: . = ZERO+160
 114:         rlio; br5
 115: #endif
 116: 
 117: #if     NHK > 0
 118: . = ZERO+210
 119:         hkio; br5
 120: #endif
 121: 
 122: #if     NRK > 0
 123: . = ZERO+220
 124:         rkio; br5
 125: #endif
 126: 
 127: . = ZERO+240
 128:         trap; br7+PIRQ.                 / programmed interrupt
 129:         trap; br7+ARITHTRAP.            / floating point
 130:         trap; br7+SEGFLT.               / segmentation violation
 131: 
 132: . = ZERO+254
 133: #if     NXP > 0
 134:         xpio; br5
 135: #else
 136: #if     NHP > 0
 137:         hpio; br5
 138: #else
 139: #if     NRM > 0
 140:         rmio; br5
 141: #endif
 142: #endif
 143: #endif
 144: 
 145: / floating vectors
 146: . = ZERO + 1000
 147: endvec = .                              / endvec should be past vector space
 148:                                         / (if NONSEP, should be at least 450)
 149: 
 150: #ifdef  MENLO_KOV
 151: / overlay descriptor tables
 152: . = ZERO+OVLY_TABLE_BASE
 153: .globl  ova, ovd, ovend
 154: ova:    .=.+20                          / overlay addresses
 155: ovd:    .=.+20                          / overlay sizes
 156: ovend:  .=.+2                           / end of overlays
 157: #endif
 158: 
 159: //////////////////////////////////////////////////////
 160: /		interface code to C
 161: //////////////////////////////////////////////////////
 162: 
 163: #ifndef KERN_NONSEP
 164: .text
 165:         /  This is text location 0 for separate I/D kernels.
 166:         mov     $zjmp, -(sp)
 167:         jsr     pc, _panic
 168:         /*NOTREACHED*/
 169: 
 170:         /  Unmap is called from _doboot to turn off memory management.
 171:         /  The "return" is arranged by putting a jmp at unmap+2 (data space).
 172: 
 173:         reset=  5
 174:         .globl unmap
 175: unmap:
 176:         reset
 177:         /  The next instruction executed is from unmap+2 in physical memory,
 178:         /  which is unmap+2 in data space.
 179: 
 180: #endif	KERN_NONSEP
 181: 
 182:         .data
 183: zjmp:   <jump to 0\0>
 184:         .text
 185: 
 186: /  CGOOD and CBAD are used by autoconfig.
 187: /  All unused vectors are set to CBAD
 188: /  before probing the devices.
 189: 
 190: .globl  CGOOD, CBAD, _conf_int
 191:         rtt = 6
 192: CGOOD:  mov     $1, _conf_int ; rtt
 193: CBAD:   mov     $-1,_conf_int ; rtt
 194: 
 195: .globl  _klrint
 196: klin:   jsr     r0,call; jmp _klrint
 197: .globl  _klxint
 198: klou:   jsr     r0,call; jmp _klxint
 199: 
 200: .globl  _clock
 201: kwlp:   jsr     r0,call; jmp _clock
 202: 
 203: #if     NDH > 0
 204: .globl  _dhrint
 205: dhin:   jsr     r0,call; jmp _dhrint
 206: .globl  _dhxint
 207: dhou:   jsr     r0,call; jmp _dhxint
 208: #endif
 209: 
 210: #if     NDM > 0
 211: .globl  _dmintr
 212: dmin:   jsr     r0,call; jmp _dmintr
 213: #endif
 214: 
 215: #if     NDZ > 0
 216: .globl  _dzrint
 217: dzin:   jsr     r0,call; jmp _dzrint
 218: #ifndef DZ_PDMA
 219: .globl  _dzxint
 220: dzou:   jsr     r0,call; jmp _dzxint
 221: #endif	DZ_PDMA
 222: #endif	NDZ
 223: 
 224: #if     NHK > 0
 225: .globl  _hkintr
 226: hkio:   jsr     r0,call; jmp _hkintr
 227: #endif
 228: 
 229: #if     NHP > 0
 230: .globl  _hpintr
 231: hpio:   jsr     r0,call; jmp _hpintr
 232: #endif
 233: 
 234: #if     NHS > 0
 235: .globl  _hsintr
 236: hsio:   jsr     r0,call; jmp _hsintr
 237: #endif
 238: 
 239: #if     NHT > 0
 240: .globl  _htintr
 241: htio:   jsr     r0,call; jmp _htintr
 242: #endif
 243: 
 244: #if     NLP > 0
 245: .globl  _lpintr
 246: lpio:   jsr     r0,call; jmp _lpintr
 247: #endif
 248: 
 249: #if     NRK > 0
 250: .globl  _rkintr
 251: rkio:   jsr     r0,call; jmp _rkintr
 252: #endif
 253: 
 254: #if     NRL > 0
 255: .globl  _rlintr
 256: rlio:   jsr     r0,call; jmp _rlintr
 257: #endif
 258: 
 259: #if     NRM > 0
 260: .globl  _rmintr
 261: rmio:   jsr     r0,call; jmp _rmintr
 262: #endif
 263: 
 264: #if     NRP > 0
 265: .globl  _rpintr
 266: rpio:   jsr     r0,call; jmp _rpintr
 267: #endif
 268: 
 269: #if     NTM > 0
 270: .globl  _tmintr
 271: tmio:   jsr     r0,call; jmp _tmintr
 272: #endif
 273: 
 274: #if     NTS > 0
 275: .globl  _tsintr
 276: tsio:   jsr     r0,call; jmp _tsintr
 277: #endif
 278: 
 279: #if     NVP > 0
 280: .globl  _vpintr
 281: vpio:   jsr     r0,call; jmp _vpintr
 282: #endif
 283: 
 284: #if     NXP > 0
 285: .globl  _xpintr
 286: xpio:   jsr     r0,call; jmp _xpintr
 287: #endif

Defined functions

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Defined macros