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1.1 ! root 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: ! 40: /* ! 41: * AT/386 ! 42: * Vector interrupt control section ! 43: */ ! 44: ! 45: .data ! 46: .globl _imen ! 47: .globl _cpl ! 48: _cpl: .long 0xffff # current priority level (all off) ! 49: _imen: .long 0xffff # interrupt mask enable (all off) ! 50: .globl _highmask ! 51: _highmask: .long 0xffff ! 52: .globl _ttymask ! 53: _ttymask: .long 0 ! 54: .globl _biomask ! 55: _biomask: .long 0 ! 56: .globl _netmask ! 57: _netmask: .long 0 ! 58: .globl _isa_intr ! 59: _isa_intr: .space 16*4 ! 60: ! 61: .text ! 62: /* ! 63: * Handle return from interrupt after device handler finishes ! 64: */ ! 65: doreti: ! 66: cli ! 67: popl %ebx # remove intr number ! 68: popl %eax # get previous priority ! 69: # now interrupt frame is a trap frame! ! 70: movw %ax,%cx ! 71: movw %ax,_cpl ! 72: orw _imen,%ax ! 73: NOP ! 74: outb %al,$ IO_ICU1+1 # re-enable intr? ! 75: NOP ! 76: movb %ah,%al ! 77: NOP ! 78: outb %al,$ IO_ICU2+1 ! 79: NOP ! 80: inb $0x84,%al ! 81: ! 82: andw $0xffff,%cx ! 83: cmpw $0,%cx # returning to zero? ! 84: je 1f ! 85: ! 86: pop %es # nope, going to non-zero level ! 87: pop %ds ! 88: popa ! 89: addl $8,%esp ! 90: iret ! 91: ! 92: 1: cmpl $0,_netisr # check for softint s/traps ! 93: jne 1f ! 94: ! 95: pop %es # none, going back to base pri ! 96: pop %ds ! 97: popa ! 98: addl $8,%esp ! 99: iret ! 100: ! 101: #include "../net/netisr.h" ! 102: ! 103: 1: ! 104: ! 105: #define DONET(s, c) ; \ ! 106: .globl c ; \ ! 107: movl $ s ,%eax ; \ ! 108: btrl %eax,_netisr ; \ ! 109: jnb 1f ; \ ! 110: call c ; \ ! 111: 1: ! 112: ! 113: call _splnet ! 114: pushl %eax ! 115: ! 116: DONET(NETISR_RAW,_rawintr) ! 117: #ifdef INET ! 118: DONET(NETISR_IP,_ipintr) ! 119: #endif ! 120: #ifdef IMP ! 121: DONET(NETISR_IMP,_impintr) ! 122: #endif ! 123: #ifdef NS ! 124: DONET(NETISR_NS,_nsintr) ! 125: #endif ! 126: ! 127: popl %eax ! 128: movw %ax,_cpl ! 129: orw _imen,%ax ! 130: NOP ! 131: outb %al,$ IO_ICU1+1 # re-enable intr? ! 132: NOP ! 133: movb %ah,%al ! 134: NOP ! 135: outb %al,$ IO_ICU2+1 ! 136: NOP ! 137: inb $0x84,%al ! 138: ! 139: # btrl $ NETISR_SCLK,_netisr ! 140: movl $ NETISR_SCLK,%eax # stupid assembler, as usual ! 141: btrl %eax,_netisr ! 142: jnb 1f ! 143: # back to an interrupt frame for a moment ! 144: call _splsoftclock ! 145: pushl %eax ! 146: pushl $0xff # dummy intr ! 147: call _softclock ! 148: popl %eax ! 149: call _splx ! 150: popl %eax ! 151: ! 152: jmp 2f ! 153: ! 154: /* 1: btrl $NETISR_AST,_netisr*/ ! 155: 1: ! 156: cmpw $0x1f,13*4(%esp) # to user? ! 157: jne 2f # nope, leave ! 158: movl $ NETISR_AST,%eax # stupid assembler, as usual ! 159: btrl %eax,_netisr ! 160: jnb 2f ! 161: call _trap ! 162: ! 163: 2: pop %es ! 164: pop %ds ! 165: popal ! 166: addl $8,%esp ! 167: iret ! 168: ! 169: /* ! 170: * Interrupt priority mechanism ! 171: * ! 172: * Two flavors -- imlXX masks relative to ISA noemenclature (for PC compat sw) ! 173: * -- splXX masks with group mechanism for BSD purposes ! 174: */ ! 175: ! 176: .globl _splhigh ! 177: .globl _splclock ! 178: _splhigh: ! 179: _splclock: ! 180: cli # disable interrupts ! 181: movw $0xffff,%ax # set new priority level ! 182: movw %ax,%dx ! 183: # orw _imen,%ax # mask off those not enabled yet ! 184: movw %ax,%cx ! 185: NOP ! 186: outb %al,$ IO_ICU1+1 /* update icu's */ ! 187: NOP ! 188: movb %ah,%al ! 189: NOP ! 190: outb %al,$ IO_ICU2+1 ! 191: NOP ! 192: inb $0x84,%al ! 193: movzwl _cpl,%eax # return old priority ! 194: movw %dx,_cpl # set new priority level ! 195: sti # enable interrupts ! 196: ret ! 197: ! 198: .globl _spltty # block clists ! 199: _spltty: ! 200: cli # disable interrupts ! 201: movw _cpl,%ax ! 202: orw _ttymask,%ax ! 203: movw %ax,%dx ! 204: orw _imen,%ax # mask off those not enabled yet ! 205: movw %ax,%cx ! 206: NOP ! 207: outb %al,$ IO_ICU1+1 /* update icu's */ ! 208: NOP ! 209: movb %ah,%al ! 210: NOP ! 211: outb %al,$ IO_ICU2+1 ! 212: NOP ! 213: inb $0x84,%al ! 214: movzwl _cpl,%eax # return old priority ! 215: movw %dx,_cpl # set new priority level ! 216: sti # enable interrupts ! 217: ret ! 218: ! 219: .globl _splimp ! 220: .globl _splnet ! 221: _splimp: ! 222: _splnet: ! 223: cli # disable interrupts ! 224: movw _cpl,%ax ! 225: orw _netmask,%ax ! 226: movw %ax,%dx ! 227: orw _imen,%ax # mask off those not enabled yet ! 228: movw %ax,%cx ! 229: NOP ! 230: outb %al,$ IO_ICU1+1 /* update icu's */ ! 231: NOP ! 232: movb %ah,%al ! 233: NOP ! 234: outb %al,$ IO_ICU2+1 ! 235: NOP ! 236: inb $0x84,%al ! 237: movzwl _cpl,%eax # return old priority ! 238: movw %dx,_cpl # set new priority level ! 239: sti # enable interrupts ! 240: ret ! 241: ! 242: .globl _splbio ! 243: _splbio: ! 244: cli # disable interrupts ! 245: movw _cpl,%ax ! 246: orw _biomask,%ax ! 247: movw %ax,%dx ! 248: orw _imen,%ax # mask off those not enabled yet ! 249: movw %ax,%cx ! 250: NOP ! 251: outb %al,$ IO_ICU1+1 /* update icu's */ ! 252: NOP ! 253: movb %ah,%al ! 254: NOP ! 255: outb %al,$ IO_ICU2+1 ! 256: NOP ! 257: inb $0x84,%al ! 258: movzwl _cpl,%eax # return old priority ! 259: movw %dx,_cpl # set new priority level ! 260: sti # enable interrupts ! 261: ret ! 262: ! 263: .globl _splsoftclock ! 264: _splsoftclock: ! 265: cli # disable interrupts ! 266: movw _cpl,%ax ! 267: orw $0x8000,%ax # set new priority level ! 268: movw %ax,%dx ! 269: orw _imen,%ax # mask off those not enabled yet ! 270: movw %ax,%cx ! 271: NOP ! 272: outb %al,$ IO_ICU1+1 /* update icu's */ ! 273: NOP ! 274: movb %ah,%al ! 275: NOP ! 276: outb %al,$ IO_ICU2+1 ! 277: NOP ! 278: inb $0x84,%al ! 279: movzwl _cpl,%eax # return old priority ! 280: movw %dx,_cpl # set new priority level ! 281: sti # enable interrupts ! 282: ret ! 283: ! 284: .globl _splnone ! 285: .globl _spl0 ! 286: _splnone: ! 287: _spl0: ! 288: cli # disable interrupts ! 289: pushl _cpl # save old priority ! 290: movw _cpl,%ax ! 291: orw _netmask,%ax # mask off those network devices ! 292: movw %ax,_cpl # set new priority level ! 293: orw _imen,%ax # mask off those not enabled yet ! 294: NOP ! 295: outb %al,$ IO_ICU1+1 /* update icu's */ ! 296: NOP ! 297: movb %ah,%al ! 298: NOP ! 299: outb %al,$ IO_ICU2+1 ! 300: NOP ! 301: inb $0x84,%al ! 302: sti # enable interrupts ! 303: ! 304: DONET(NETISR_RAW,_rawintr) ! 305: #ifdef INET ! 306: DONET(NETISR_IP,_ipintr) ! 307: #endif ! 308: cli # disable interrupts ! 309: popl _cpl # save old priority ! 310: movw $0,%ax # set new priority level ! 311: movw %ax,%dx ! 312: orw _imen,%ax # mask off those not enabled yet ! 313: movw %ax,%cx ! 314: NOP ! 315: outb %al,$ IO_ICU1+1 /* update icu's */ ! 316: NOP ! 317: movb %ah,%al ! 318: NOP ! 319: outb %al,$ IO_ICU2+1 ! 320: NOP ! 321: inb $0x84,%al ! 322: movzwl _cpl,%eax # return old priority ! 323: movw %dx,_cpl # set new priority level ! 324: sti # enable interrupts ! 325: ret ! 326: ! 327: .globl _splx ! 328: _splx: ! 329: cli # disable interrupts ! 330: movw 4(%esp),%ax # new priority level ! 331: movw %ax,%dx ! 332: cmpw $0,%dx ! 333: je _spl0 # going to "zero level" is special ! 334: ! 335: orw _imen,%ax # mask off those not enabled yet ! 336: movw %ax,%cx ! 337: NOP ! 338: outb %al,$ IO_ICU1+1 /* update icu's */ ! 339: NOP ! 340: movb %ah,%al ! 341: NOP ! 342: outb %al,$ IO_ICU2+1 ! 343: NOP ! 344: inb $0x84,%al ! 345: movzwl _cpl,%eax # return old priority ! 346: movw %dx,_cpl # set new priority level ! 347: sti # enable interrupts ! 348: ret ! 349: ! 350: #ifdef notyet ! 351: .globl _iml8 # mask off all but irq0-1 ! 352: _iml8: ! 353: cli # disable interrupts ! 354: movw $0xfffc,%ax # set new priority level ! 355: movw %ax,%dx ! 356: orw _imen,%ax # mask off those not enabled yet ! 357: movw %ax,%cx ! 358: NOP ! 359: outb %al,$ IO_ICU1+1 /* update icu's */ ! 360: NOP ! 361: movb %ah,%al ! 362: NOP ! 363: outb %al,$ IO_ICU2+1 ! 364: NOP ! 365: movzwl _cpl,%eax # return old priority ! 366: movw %dx,_cpl # set new priority level ! 367: sti # enable interrupts ! 368: ret ! 369: ! 370: .globl _iml10 # mask off all but irq0-1,8-9 ! 371: _iml10: ! 372: cli # disable interrupts ! 373: movw $0xfcf8,%ax # set new priority level ! 374: movw %ax,%dx ! 375: orw _imen,%ax # mask off those not enabled yet ! 376: movw %ax,%cx ! 377: NOP ! 378: outb %al,$ IO_ICU1+1 /* update icu's */ ! 379: NOP ! 380: movb %ah,%al ! 381: NOP ! 382: outb %al,$ IO_ICU2+1 ! 383: NOP ! 384: movzwl _cpl,%eax # return old priority ! 385: movw %dx,_cpl # set new priority level ! 386: sti # enable interrupts ! 387: ret ! 388: ! 389: .globl _iml11 # mask off all but irq0-1,8-10 ! 390: _iml11: ! 391: cli # disable interrupts ! 392: movw $0xf8f8,%ax # set new priority level ! 393: movw %ax,%dx ! 394: orw _imen,%ax # mask off those not enabled yet ! 395: movw %ax,%cx ! 396: NOP ! 397: outb %al,$ IO_ICU1+1 /* update icu's */ ! 398: NOP ! 399: movb %ah,%al ! 400: NOP ! 401: outb %al,$ IO_ICU2+1 ! 402: NOP ! 403: movzwl _cpl,%eax # return old priority ! 404: movw %dx,_cpl # set new priority level ! 405: sti # enable interrupts ! 406: ret ! 407: ! 408: .globl _iml12 # mask off all but irq0-1,8-11 ! 409: _iml12: ! 410: cli # disable interrupts ! 411: movw $0xf0f8,%ax # set new priority level ! 412: movw %ax,%dx ! 413: orw _imen,%ax # mask off those not enabled yet ! 414: movw %ax,%cx ! 415: NOP ! 416: outb %al,$ IO_ICU1+1 /* update icu's */ ! 417: NOP ! 418: movb %ah,%al ! 419: NOP ! 420: outb %al,$ IO_ICU2+1 ! 421: NOP ! 422: movzwl _cpl,%eax # return old priority ! 423: movw %dx,_cpl # set new priority level ! 424: sti # enable interrupts ! 425: ret ! 426: ! 427: .globl _iml13 # mask off all but irq0-1,8-12 ! 428: _iml13: ! 429: cli # disable interrupts ! 430: movw $0xe0f8,%ax # set new priority level ! 431: movw %ax,%dx ! 432: orw _imen,%ax # mask off those not enabled yet ! 433: movw %ax,%cx ! 434: NOP ! 435: outb %al,$ IO_ICU1+1 /* update icu's */ ! 436: NOP ! 437: movb %ah,%al ! 438: NOP ! 439: outb %al,$ IO_ICU2+1 ! 440: NOP ! 441: movzwl _cpl,%eax # return old priority ! 442: movw %dx,_cpl # set new priority level ! 443: sti # enable interrupts ! 444: ret ! 445: ! 446: .globl _iml15 # mask off all but irq0-1,8-14 ! 447: _iml15: ! 448: cli # disable interrupts ! 449: movw $0x80f8,%ax # set new priority level ! 450: movw %ax,%dx ! 451: orw _imen,%ax # mask off those not enabled yet ! 452: movw %ax,%cx ! 453: NOP ! 454: outb %al,$ IO_ICU1+1 /* update icu's */ ! 455: NOP ! 456: movb %ah,%al ! 457: NOP ! 458: outb %al,$ IO_ICU2+1 ! 459: NOP ! 460: movzwl _cpl,%eax # return old priority ! 461: movw %dx,_cpl # set new priority level ! 462: sti # enable interrupts ! 463: ret ! 464: ! 465: .globl _iml3 # mask off all but irq0-1,8-15 ! 466: _iml3: ! 467: cli # disable interrupts ! 468: movw $0x00f8,%ax # set new priority level ! 469: movw %ax,%dx ! 470: orw _imen,%ax # mask off those not enabled yet ! 471: movw %ax,%cx ! 472: NOP ! 473: outb %al,$ IO_ICU1+1 /* update icu's */ ! 474: NOP ! 475: movb %ah,%al ! 476: NOP ! 477: outb %al,$ IO_ICU2+1 ! 478: NOP ! 479: movzwl _cpl,%eax # return old priority ! 480: movw %dx,_cpl # set new priority level ! 481: sti # enable interrupts ! 482: ret ! 483: ! 484: .globl _iml4 # mask off all but irq0-1,8-15,3 ! 485: _iml4: ! 486: cli # disable interrupts ! 487: movw $0x00f0,%ax # set new priority level ! 488: movw %ax,%dx ! 489: orw _imen,%ax # mask off those not enabled yet ! 490: movw %ax,%cx ! 491: NOP ! 492: outb %al,$ IO_ICU1+1 /* update icu's */ ! 493: NOP ! 494: movb %ah,%al ! 495: NOP ! 496: outb %al,$ IO_ICU2+1 ! 497: NOP ! 498: movzwl _cpl,%eax # return old priority ! 499: movw %dx,_cpl # set new priority level ! 500: sti # enable interrupts ! 501: ret ! 502: ! 503: .globl _iml5 # mask off all but irq0-1,8-15,3-4 ! 504: _iml5: ! 505: cli # disable interrupts ! 506: movw $0x00e0,%ax # set new priority level ! 507: movw %ax,%dx ! 508: orw _imen,%ax # mask off those not enabled yet ! 509: movw %ax,%cx ! 510: NOP ! 511: outb %al,$ IO_ICU1+1 /* update icu's */ ! 512: NOP ! 513: movb %ah,%al ! 514: NOP ! 515: outb %al,$ IO_ICU2+1 ! 516: NOP ! 517: movzwl _cpl,%eax # return old priority ! 518: movw %dx,_cpl # set new priority level ! 519: sti # enable interrupts ! 520: ret ! 521: ! 522: .globl _iml6 # mask off all but irq0-1,8-15,3-5 ! 523: _iml6: ! 524: cli # disable interrupts ! 525: movw $0x00c0,%ax # set new priority level ! 526: movw %ax,%dx ! 527: orw _imen,%ax # mask off those not enabled yet ! 528: movw %ax,%cx ! 529: NOP ! 530: outb %al,$ IO_ICU1+1 /* update icu's */ ! 531: NOP ! 532: movb %ah,%al ! 533: NOP ! 534: outb %al,$ IO_ICU2+1 ! 535: NOP ! 536: movzwl _cpl,%eax # return old priority ! 537: movw %dx,_cpl # set new priority level ! 538: sti # enable interrupts ! 539: ret ! 540: ! 541: #endif notyet ! 542: ! 543: /* hardware interrupt catcher (IDT 32 - 47) */ ! 544: .globl _isa_strayintr ! 545: ! 546: IDTVEC(intr0) ! 547: INTR(0, _highmask, 0) ; call _isa_strayintr ; INTREXIT1 ! 548: ! 549: IDTVEC(intr1) ! 550: INTR(1, _highmask, 1) ; call _isa_strayintr ; INTREXIT1 ! 551: ! 552: IDTVEC(intr2) ! 553: INTR(2, _highmask, 2) ; call _isa_strayintr ; INTREXIT1 ! 554: ! 555: IDTVEC(intr3) ! 556: INTR(3, _highmask, 3) ; call _isa_strayintr ; INTREXIT1 ! 557: ! 558: IDTVEC(intr4) ! 559: INTR(4, _highmask, 4) ; call _isa_strayintr ; INTREXIT1 ! 560: ! 561: IDTVEC(intr5) ! 562: INTR(5, _highmask, 5) ; call _isa_strayintr ; INTREXIT1 ! 563: ! 564: IDTVEC(intr6) ! 565: INTR(6, _highmask, 6) ; call _isa_strayintr ; INTREXIT1 ! 566: ! 567: IDTVEC(intr7) ! 568: INTR(7, _highmask, 7) ; call _isa_strayintr ; INTREXIT1 ! 569: ! 570: ! 571: IDTVEC(intr8) ! 572: INTR(8, _highmask, 8) ; call _isa_strayintr ; INTREXIT2 ! 573: ! 574: IDTVEC(intr9) ! 575: INTR(9, _highmask, 9) ; call _isa_strayintr ; INTREXIT2 ! 576: ! 577: IDTVEC(intr10) ! 578: INTR(10, _highmask, 10) ; call _isa_strayintr ; INTREXIT2 ! 579: ! 580: IDTVEC(intr11) ! 581: INTR(11, _highmask, 11) ; call _isa_strayintr ; INTREXIT2 ! 582: ! 583: IDTVEC(intr12) ! 584: INTR(12, _highmask, 12) ; call _isa_strayintr ; INTREXIT2 ! 585: ! 586: IDTVEC(intr13) ! 587: INTR(13, _highmask, 13) ; call _isa_strayintr ; INTREXIT2 ! 588: ! 589: IDTVEC(intr14) ! 590: INTR(14, _highmask, 14) ; call _isa_strayintr ; INTREXIT2 ! 591: ! 592: IDTVEC(intr15) ! 593: INTR(15, _highmask, 15) ; call _isa_strayintr ; INTREXIT2 ! 594:
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