| 1 | /*- |
| 2 | * Copyright (c) 1989, 1990 William F. Jolitz. |
| 3 | * Copyright (c) 1990 The Regents of the University of California. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * This code is derived from software contributed to Berkeley by |
| 7 | * William Jolitz. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. All advertising materials mentioning features or use of this software |
| 18 | * must display the following acknowledgement: |
| 19 | * This product includes software developed by the University of |
| 20 | * California, Berkeley and its contributors. |
| 21 | * 4. Neither the name of the University nor the names of its contributors |
| 22 | * may be used to endorse or promote products derived from this software |
| 23 | * without specific prior written permission. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 35 | * SUCH DAMAGE. |
| 36 | * |
| 37 | * @(#)icu.s 7.2 (Berkeley) 5/21/91 |
| 38 | * |
| 39 | * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE |
| 40 | * -------------------- ----- ---------------------- |
| 41 | * CURRENT PATCH LEVEL: 2 00117 |
| 42 | * -------------------- ----- ---------------------- |
| 43 | * |
| 44 | * 28 Nov 92 Frank MacLachlan Aligned addresses and data |
| 45 | * on 32bit boundaries. |
| 46 | * 24 Mar 93 Rodney W. Grimes Added interrupt counters for vmstat |
| 47 | * also stray and false intr counters added |
| 48 | */ |
| 49 | |
| 50 | /* |
| 51 | * AT/386 |
| 52 | * Vector interrupt control section |
| 53 | */ |
| 54 | |
| 55 | .data |
| 56 | ALIGN32 |
| 57 | .globl _imen |
| 58 | .globl _cpl |
| 59 | _cpl: .long 0xffff # current priority level (all off) |
| 60 | _imen: .long 0xffff # interrupt mask enable (all off) |
| 61 | .globl _highmask |
| 62 | _highmask: .long 0xffff |
| 63 | .globl _ttymask |
| 64 | _ttymask: .long 0 |
| 65 | .globl _biomask |
| 66 | _biomask: .long 0 |
| 67 | .globl _netmask |
| 68 | _netmask: .long 0 |
| 69 | .globl _isa_intr |
| 70 | /* |
| 71 | * This is the names of the counters for vmstat added by |
| 72 | * rgrimes@agora.rain.com (Rodney W. Grimes) 10/30/1992 |
| 73 | * Added false and stray counters 3/25/1993 rgrimes |
| 74 | */ |
| 75 | .globl _intrcnt, _eintrcnt /* Added to make vmstat happy */ |
| 76 | .globl _isa_false7_intrcnt, _isa_false15_intrcnt, _isa_stray_intrcnt |
| 77 | _intrcnt: /* Added to make vmstat happy */ |
| 78 | _isa_false7_intrcnt: |
| 79 | .space 4 /* false IRQ7's */ |
| 80 | _isa_false15_intrcnt: |
| 81 | .space 4 /* false IRQ15's */ |
| 82 | _isa_stray_intrcnt: |
| 83 | .space 4 /* stray interrupts */ |
| 84 | _isa_intr: .space 16*4 |
| 85 | _eintrcnt: /* Added to make vmstat happy */ |
| 86 | |
| 87 | .text |
| 88 | /* |
| 89 | * Handle return from interrupt after device handler finishes |
| 90 | */ |
| 91 | ALIGN32 |
| 92 | doreti: |
| 93 | cli |
| 94 | popl %ebx # remove intr number |
| 95 | NOP |
| 96 | popl %eax # get previous priority |
| 97 | # now interrupt frame is a trap frame! |
| 98 | movw %ax,%cx |
| 99 | movw %ax,_cpl |
| 100 | orw _imen,%ax |
| 101 | outb %al,$ IO_ICU1+1 # re-enable intr? |
| 102 | NOP |
| 103 | movb %ah,%al |
| 104 | outb %al,$ IO_ICU2+1 |
| 105 | NOP |
| 106 | |
| 107 | cmpw $0x1f,13*4(%esp) # to user? |
| 108 | je 1f # nope, leave |
| 109 | andw $0xffff,%cx |
| 110 | cmpw $0,%cx # returning to zero? |
| 111 | je 1f |
| 112 | |
| 113 | pop %es # nope, going to non-zero level |
| 114 | pop %ds |
| 115 | popa |
| 116 | addl $8,%esp |
| 117 | iret |
| 118 | |
| 119 | ALIGN32 |
| 120 | 1: cmpl $0,_netisr # check for softint s/traps |
| 121 | jne 1f |
| 122 | cmpl $0,_want_resched |
| 123 | jne 1f |
| 124 | |
| 125 | pop %es # none, going back to base pri |
| 126 | pop %ds |
| 127 | popa |
| 128 | addl $8,%esp |
| 129 | iret |
| 130 | |
| 131 | #include "../net/netisr.h" |
| 132 | |
| 133 | ALIGN32 |
| 134 | 1: |
| 135 | |
| 136 | #define DONET(s, c) ; \ |
| 137 | .globl c ; \ |
| 138 | btrl $ s ,_netisr ; \ |
| 139 | jnb 1f ; \ |
| 140 | call c ; \ |
| 141 | 1: |
| 142 | |
| 143 | call _splnet |
| 144 | |
| 145 | DONET(NETISR_RAW,_rawintr) |
| 146 | #ifdef INET |
| 147 | DONET(NETISR_IP,_ipintr) |
| 148 | #endif |
| 149 | #ifdef IMP |
| 150 | DONET(NETISR_IMP,_impintr) |
| 151 | #endif |
| 152 | #ifdef NS |
| 153 | DONET(NETISR_NS,_nsintr) |
| 154 | #endif |
| 155 | |
| 156 | #ifdef notdef |
| 157 | NOP |
| 158 | popl %eax |
| 159 | movw %ax,_cpl |
| 160 | orw _imen,%ax |
| 161 | outb %al,$ IO_ICU1+1 # re-enable intr? |
| 162 | NOP |
| 163 | movb %ah,%al |
| 164 | outb %al,$ IO_ICU2+1 |
| 165 | NOP |
| 166 | #else |
| 167 | call _spl0 |
| 168 | #endif |
| 169 | |
| 170 | btrl $ NETISR_SCLK,_netisr |
| 171 | jnb 1f |
| 172 | # back to an interrupt frame for a moment |
| 173 | call _splsoftclock |
| 174 | pushl $0xff # dummy intr |
| 175 | call _softclock |
| 176 | popl %eax |
| 177 | call _spl0 |
| 178 | |
| 179 | # jmp 2f |
| 180 | |
| 181 | 1: |
| 182 | cmpw $0x1f,13*4(%esp) # to user? |
| 183 | jne 2f # nope, leave |
| 184 | cmpl $0,_want_resched |
| 185 | je 2f |
| 186 | call _trap |
| 187 | |
| 188 | 2: pop %es |
| 189 | pop %ds |
| 190 | popal |
| 191 | addl $8,%esp |
| 192 | iret |
| 193 | |
| 194 | /* |
| 195 | * Interrupt priority mechanism |
| 196 | * |
| 197 | * Two flavors -- imlXX masks relative to ISA noemenclature (for PC compat sw) |
| 198 | * -- splXX masks with group mechanism for BSD purposes |
| 199 | */ |
| 200 | |
| 201 | .globl _splhigh |
| 202 | .globl _splclock |
| 203 | ALIGN32 |
| 204 | _splhigh: |
| 205 | _splclock: |
| 206 | cli # disable interrupts |
| 207 | NOP |
| 208 | movw $0xffff,%ax # set new priority level |
| 209 | movw %ax,%dx |
| 210 | # orw _imen,%ax # mask off those not enabled yet |
| 211 | movw %ax,%cx |
| 212 | outb %al,$ IO_ICU1+1 /* update icu's */ |
| 213 | NOP |
| 214 | movb %ah,%al |
| 215 | outb %al,$ IO_ICU2+1 |
| 216 | NOP |
| 217 | movzwl _cpl,%eax # return old priority |
| 218 | movw %dx,_cpl # set new priority level |
| 219 | sti # enable interrupts |
| 220 | ret |
| 221 | |
| 222 | .globl _spltty # block clists |
| 223 | ALIGN32 |
| 224 | _spltty: |
| 225 | cli # disable interrupts |
| 226 | NOP |
| 227 | movw _cpl,%ax |
| 228 | orw _ttymask,%ax |
| 229 | movw %ax,%dx |
| 230 | orw _imen,%ax # mask off those not enabled yet |
| 231 | movw %ax,%cx |
| 232 | outb %al,$ IO_ICU1+1 /* update icu's */ |
| 233 | NOP |
| 234 | movb %ah,%al |
| 235 | outb %al,$ IO_ICU2+1 |
| 236 | NOP |
| 237 | movzwl _cpl,%eax # return old priority |
| 238 | movw %dx,_cpl # set new priority level |
| 239 | sti # enable interrupts |
| 240 | ret |
| 241 | |
| 242 | .globl _splimp |
| 243 | .globl _splnet |
| 244 | ALIGN32 |
| 245 | _splimp: |
| 246 | _splnet: |
| 247 | cli # disable interrupts |
| 248 | NOP |
| 249 | movw _cpl,%ax |
| 250 | orw _netmask,%ax |
| 251 | movw %ax,%dx |
| 252 | orw _imen,%ax # mask off those not enabled yet |
| 253 | movw %ax,%cx |
| 254 | outb %al,$ IO_ICU1+1 /* update icu's */ |
| 255 | NOP |
| 256 | movb %ah,%al |
| 257 | outb %al,$ IO_ICU2+1 |
| 258 | NOP |
| 259 | movzwl _cpl,%eax # return old priority |
| 260 | movw %dx,_cpl # set new priority level |
| 261 | sti # enable interrupts |
| 262 | ret |
| 263 | |
| 264 | .globl _splbio |
| 265 | ALIGN32 |
| 266 | _splbio: |
| 267 | cli # disable interrupts |
| 268 | NOP |
| 269 | movw _cpl,%ax |
| 270 | orw _biomask,%ax |
| 271 | movw %ax,%dx |
| 272 | orw _imen,%ax # mask off those not enabled yet |
| 273 | movw %ax,%cx |
| 274 | outb %al,$ IO_ICU1+1 /* update icu's */ |
| 275 | NOP |
| 276 | movb %ah,%al |
| 277 | outb %al,$ IO_ICU2+1 |
| 278 | NOP |
| 279 | movzwl _cpl,%eax # return old priority |
| 280 | movw %dx,_cpl # set new priority level |
| 281 | sti # enable interrupts |
| 282 | ret |
| 283 | |
| 284 | .globl _splsoftclock |
| 285 | ALIGN32 |
| 286 | _splsoftclock: |
| 287 | cli # disable interrupts |
| 288 | NOP |
| 289 | movw _cpl,%ax |
| 290 | orw $0x8000,%ax # set new priority level |
| 291 | movw %ax,%dx |
| 292 | orw _imen,%ax # mask off those not enabled yet |
| 293 | movw %ax,%cx |
| 294 | outb %al,$ IO_ICU1+1 /* update icu's */ |
| 295 | NOP |
| 296 | movb %ah,%al |
| 297 | outb %al,$ IO_ICU2+1 |
| 298 | NOP |
| 299 | movzwl _cpl,%eax # return old priority |
| 300 | movw %dx,_cpl # set new priority level |
| 301 | sti # enable interrupts |
| 302 | ret |
| 303 | |
| 304 | .globl _splnone |
| 305 | .globl _spl0 |
| 306 | ALIGN32 |
| 307 | _splnone: |
| 308 | _spl0: |
| 309 | cli # disable interrupts |
| 310 | NOP |
| 311 | pushl _cpl # save old priority |
| 312 | movw _cpl,%ax |
| 313 | orw _netmask,%ax # mask off those network devices |
| 314 | movw %ax,_cpl # set new priority level |
| 315 | orw _imen,%ax # mask off those not enabled yet |
| 316 | outb %al,$ IO_ICU1+1 /* update icu's */ |
| 317 | NOP |
| 318 | movb %ah,%al |
| 319 | outb %al,$ IO_ICU2+1 |
| 320 | NOP |
| 321 | sti # enable interrupts |
| 322 | |
| 323 | DONET(NETISR_RAW,_rawintr) |
| 324 | #ifdef INET |
| 325 | DONET(NETISR_IP,_ipintr) |
| 326 | #endif |
| 327 | cli # disable interrupts |
| 328 | popl _cpl # save old priority |
| 329 | NOP |
| 330 | movw $0,%ax # set new priority level |
| 331 | movw %ax,%dx |
| 332 | orw _imen,%ax # mask off those not enabled yet |
| 333 | movw %ax,%cx |
| 334 | outb %al,$ IO_ICU1+1 /* update icu's */ |
| 335 | NOP |
| 336 | movb %ah,%al |
| 337 | outb %al,$ IO_ICU2+1 |
| 338 | NOP |
| 339 | movzwl _cpl,%eax # return old priority |
| 340 | movw %dx,_cpl # set new priority level |
| 341 | sti # enable interrupts |
| 342 | ret |
| 343 | |
| 344 | .globl _splx |
| 345 | ALIGN32 |
| 346 | _splx: |
| 347 | cli # disable interrupts |
| 348 | NOP |
| 349 | movw 4(%esp),%ax # new priority level |
| 350 | movw %ax,%dx |
| 351 | cmpw $0,%dx |
| 352 | je _spl0 # going to "zero level" is special |
| 353 | |
| 354 | orw _imen,%ax # mask off those not enabled yet |
| 355 | movw %ax,%cx |
| 356 | outb %al,$ IO_ICU1+1 /* update icu's */ |
| 357 | NOP |
| 358 | movb %ah,%al |
| 359 | outb %al,$ IO_ICU2+1 |
| 360 | NOP |
| 361 | movzwl _cpl,%eax # return old priority |
| 362 | movw %dx,_cpl # set new priority level |
| 363 | sti # enable interrupts |
| 364 | ret |
| 365 | |
| 366 | /* hardware interrupt catcher (IDT 32 - 47) */ |
| 367 | .globl _isa_strayintr |
| 368 | |
| 369 | IDTVEC(intr0) |
| 370 | INTRSTRAY(0, _highmask, 0) ; call _isa_strayintr ; INTREXIT1 |
| 371 | |
| 372 | IDTVEC(intr1) |
| 373 | INTRSTRAY(1, _highmask, 1) ; call _isa_strayintr ; INTREXIT1 |
| 374 | |
| 375 | IDTVEC(intr2) |
| 376 | INTRSTRAY(2, _highmask, 2) ; call _isa_strayintr ; INTREXIT1 |
| 377 | |
| 378 | IDTVEC(intr3) |
| 379 | INTRSTRAY(3, _highmask, 3) ; call _isa_strayintr ; INTREXIT1 |
| 380 | |
| 381 | IDTVEC(intr4) |
| 382 | INTRSTRAY(4, _highmask, 4) ; call _isa_strayintr ; INTREXIT1 |
| 383 | |
| 384 | IDTVEC(intr5) |
| 385 | INTRSTRAY(5, _highmask, 5) ; call _isa_strayintr ; INTREXIT1 |
| 386 | |
| 387 | IDTVEC(intr6) |
| 388 | INTRSTRAY(6, _highmask, 6) ; call _isa_strayintr ; INTREXIT1 |
| 389 | |
| 390 | IDTVEC(intr7) |
| 391 | INTRSTRAY(7, _highmask, 7) ; call _isa_strayintr ; INTREXIT1 |
| 392 | |
| 393 | |
| 394 | IDTVEC(intr8) |
| 395 | INTRSTRAY(8, _highmask, 8) ; call _isa_strayintr ; INTREXIT2 |
| 396 | |
| 397 | IDTVEC(intr9) |
| 398 | INTRSTRAY(9, _highmask, 9) ; call _isa_strayintr ; INTREXIT2 |
| 399 | |
| 400 | IDTVEC(intr10) |
| 401 | INTRSTRAY(10, _highmask, 10) ; call _isa_strayintr ; INTREXIT2 |
| 402 | |
| 403 | IDTVEC(intr11) |
| 404 | INTRSTRAY(11, _highmask, 11) ; call _isa_strayintr ; INTREXIT2 |
| 405 | |
| 406 | IDTVEC(intr12) |
| 407 | INTRSTRAY(12, _highmask, 12) ; call _isa_strayintr ; INTREXIT2 |
| 408 | |
| 409 | IDTVEC(intr13) |
| 410 | INTRSTRAY(13, _highmask, 13) ; call _isa_strayintr ; INTREXIT2 |
| 411 | |
| 412 | IDTVEC(intr14) |
| 413 | INTRSTRAY(14, _highmask, 14) ; call _isa_strayintr ; INTREXIT2 |
| 414 | |
| 415 | IDTVEC(intr15) |
| 416 | INTRSTRAY(15, _highmask, 15) ; call _isa_strayintr ; INTREXIT2 |
| 417 | |
| 418 | IDTVEC(intrdefault) |
| 419 | INTRSTRAY(255, _highmask, 255) ; call _isa_strayintr ; INTREXIT2 |