Annotation of sys/arch/m88k/m88k/m88k_machdep.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: m88k_machdep.c,v 1.21 2007/05/29 18:10:42 miod Exp $ */
! 2: /*
! 3: * Copyright (c) 1998, 1999, 2000, 2001 Steve Murphree, Jr.
! 4: * Copyright (c) 1996 Nivas Madhur
! 5: * All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by Nivas Madhur.
! 18: * 4. The name of the author may not be used to endorse or promote products
! 19: * derived from this software without specific prior written permission
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 22: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 23: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 24: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 25: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 26: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 27: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 28: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 29: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 30: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 31: *
! 32: */
! 33: /*
! 34: * Mach Operating System
! 35: * Copyright (c) 1993-1991 Carnegie Mellon University
! 36: * Copyright (c) 1991 OMRON Corporation
! 37: * All Rights Reserved.
! 38: *
! 39: * Permission to use, copy, modify and distribute this software and its
! 40: * documentation is hereby granted, provided that both the copyright
! 41: * notice and this permission notice appear in all copies of the
! 42: * software, derivative works or modified versions, and any portions
! 43: * thereof, and that both notices appear in supporting documentation.
! 44: *
! 45: */
! 46:
! 47: #include <sys/param.h>
! 48: #include <sys/systm.h>
! 49: #include <sys/kernel.h>
! 50: #include <sys/proc.h>
! 51: #include <sys/user.h>
! 52: #include <sys/msgbuf.h>
! 53: #include <sys/exec.h>
! 54: #include <sys/errno.h>
! 55: #include <sys/lock.h>
! 56: #ifdef MULTIPROCESSOR
! 57: #include <sys/mplock.h>
! 58: #endif
! 59:
! 60: #include <machine/asm.h>
! 61: #include <machine/asm_macro.h>
! 62: #include <machine/atomic.h>
! 63: #include <machine/cmmu.h>
! 64: #include <machine/cpu.h>
! 65: #include <machine/reg.h>
! 66: #ifdef M88100
! 67: #include <machine/m88100.h>
! 68: #endif
! 69:
! 70: #include <uvm/uvm_extern.h>
! 71:
! 72: #include <net/netisr.h>
! 73:
! 74: #ifdef DDB
! 75: #include <machine/db_machdep.h>
! 76: #include <ddb/db_extern.h>
! 77: #include <ddb/db_interface.h>
! 78: #endif /* DDB */
! 79:
! 80: typedef struct {
! 81: u_int32_t word_one, word_two;
! 82: } m88k_exception_vector_area;
! 83:
! 84: void dosoftint(void);
! 85: void dumpconf(void);
! 86: void dumpsys(void);
! 87: void regdump(struct trapframe *f);
! 88: void vector_init(m88k_exception_vector_area *, u_int32_t *);
! 89:
! 90: /*
! 91: * CMMU and CPU variables
! 92: */
! 93:
! 94: #ifdef MULTIPROCESSOR
! 95: __cpu_simple_lock_t cmmu_cpu_lock = __SIMPLELOCK_UNLOCKED;
! 96: cpuid_t master_cpu;
! 97: struct __mp_lock sir_lock;
! 98: #endif
! 99:
! 100: struct cpu_info m88k_cpus[MAX_CPUS];
! 101: u_int max_cpus;
! 102:
! 103: struct cmmu_p *cmmu;
! 104:
! 105: /*
! 106: * safepri is a safe priority for sleep to set for a spin-wait
! 107: * during autoconfiguration or after a panic.
! 108: */
! 109: int safepri = IPL_NONE;
! 110:
! 111: /*
! 112: * Set registers on exec.
! 113: * Clear all except sp and pc.
! 114: */
! 115: void
! 116: setregs(p, pack, stack, retval)
! 117: struct proc *p;
! 118: struct exec_package *pack;
! 119: u_long stack;
! 120: int retval[2];
! 121: {
! 122: struct trapframe *tf = (struct trapframe *)USER_REGS(p);
! 123:
! 124: /*
! 125: * The syscall will ``return'' to snip; set it.
! 126: * argc, argv, envp are placed on the stack by copyregs.
! 127: * Point r2 to the stack. crt0 should extract envp from
! 128: * argc & argv before calling user's main.
! 129: */
! 130:
! 131: bzero((caddr_t)tf, sizeof *tf);
! 132:
! 133: #ifdef M88110
! 134: if (CPU_IS88110) {
! 135: /*
! 136: * user mode, serialize mem, interrupts enabled,
! 137: * graphics unit, fp enabled
! 138: */
! 139: tf->tf_epsr = PSR_SRM | PSR_SFD;
! 140: /*
! 141: * XXX disable OoO for now...
! 142: */
! 143: tf->tf_epsr |= PSR_SER;
! 144: }
! 145: #endif
! 146: #ifdef M88100
! 147: if (CPU_IS88100) {
! 148: /*
! 149: * user mode, interrupts enabled,
! 150: * no graphics unit, fp enabled
! 151: */
! 152: tf->tf_epsr = PSR_SFD | PSR_SFD2;
! 153: }
! 154: #endif
! 155:
! 156: /*
! 157: * We want to start executing at pack->ep_entry. The way to
! 158: * do this is force the processor to fetch from ep_entry. Set
! 159: * NIP to something bogus and invalid so that it will be a NOOP.
! 160: * And set sfip to ep_entry with valid bit on so that it will be
! 161: * fetched. mc88110 - just set exip to pack->ep_entry.
! 162: */
! 163: #ifdef M88110
! 164: if (CPU_IS88110) {
! 165: tf->tf_exip = pack->ep_entry & XIP_ADDR;
! 166: }
! 167: #endif
! 168: #ifdef M88100
! 169: if (CPU_IS88100) {
! 170: tf->tf_snip = pack->ep_entry & NIP_ADDR;
! 171: tf->tf_sfip = (pack->ep_entry & FIP_ADDR) | FIP_V;
! 172: }
! 173: #endif
! 174: tf->tf_r[2] = stack;
! 175: tf->tf_r[31] = stack;
! 176: retval[1] = 0;
! 177: }
! 178:
! 179: int
! 180: copystr(fromaddr, toaddr, maxlength, lencopied)
! 181: const void *fromaddr;
! 182: void *toaddr;
! 183: size_t maxlength;
! 184: size_t *lencopied;
! 185: {
! 186: u_int tally;
! 187:
! 188: tally = 0;
! 189:
! 190: while (maxlength--) {
! 191: *(u_char *)toaddr = *(u_char *)fromaddr++;
! 192: tally++;
! 193: if (*(u_char *)toaddr++ == 0) {
! 194: if (lencopied) *lencopied = tally;
! 195: return (0);
! 196: }
! 197: }
! 198:
! 199: if (lencopied)
! 200: *lencopied = tally;
! 201:
! 202: return (ENAMETOOLONG);
! 203: }
! 204:
! 205: void
! 206: setrunqueue(p)
! 207: struct proc *p;
! 208: {
! 209: struct prochd *q;
! 210: struct proc *oldlast;
! 211: int which = p->p_priority >> 2;
! 212:
! 213: #ifdef DIAGNOSTIC
! 214: if (p->p_back != NULL)
! 215: panic("setrunqueue %p", p);
! 216: #endif
! 217: q = &qs[which];
! 218: whichqs |= 1 << which;
! 219: p->p_forw = (struct proc *)q;
! 220: p->p_back = oldlast = q->ph_rlink;
! 221: q->ph_rlink = p;
! 222: oldlast->p_forw = p;
! 223: }
! 224:
! 225: /*
! 226: * Remove process p from its run queue, which should be the one
! 227: * indicated by its priority. Calls should be made at splstatclock().
! 228: */
! 229: void
! 230: remrunqueue(vp)
! 231: struct proc *vp;
! 232: {
! 233: struct proc *p = vp;
! 234: int which = p->p_priority >> 2;
! 235: struct prochd *q;
! 236:
! 237: #ifdef DIAGNOSTIC
! 238: if ((whichqs & (1 << which)) == 0)
! 239: panic("remrq %p", p);
! 240: #endif
! 241: p->p_forw->p_back = p->p_back;
! 242: p->p_back->p_forw = p->p_forw;
! 243: p->p_back = NULL;
! 244: q = &qs[which];
! 245: if (q->ph_link == (struct proc *)q)
! 246: whichqs &= ~(1 << which);
! 247: }
! 248:
! 249: #ifdef DDB
! 250: int longformat = 1;
! 251: void
! 252: regdump(struct trapframe *f)
! 253: {
! 254: #define R(i) f->tf_r[i]
! 255: printf("R00-05: 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
! 256: R(0),R(1),R(2),R(3),R(4),R(5));
! 257: printf("R06-11: 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
! 258: R(6),R(7),R(8),R(9),R(10),R(11));
! 259: printf("R12-17: 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
! 260: R(12),R(13),R(14),R(15),R(16),R(17));
! 261: printf("R18-23: 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
! 262: R(18),R(19),R(20),R(21),R(22),R(23));
! 263: printf("R24-29: 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
! 264: R(24),R(25),R(26),R(27),R(28),R(29));
! 265: printf("R30-31: 0x%08x 0x%08x\n",R(30),R(31));
! 266: #ifdef M88110
! 267: if (CPU_IS88110) {
! 268: printf("exip %x enip %x\n", f->tf_exip, f->tf_enip);
! 269: }
! 270: #endif
! 271: #ifdef M88100
! 272: if (CPU_IS88100) {
! 273: printf("sxip %x snip %x sfip %x\n",
! 274: f->tf_sxip, f->tf_snip, f->tf_sfip);
! 275: }
! 276: if (CPU_IS88100 && f->tf_vector == 0x3) {
! 277: /* print dmt stuff for data access fault */
! 278: printf("dmt0 %x dmd0 %x dma0 %x\n",
! 279: f->tf_dmt0, f->tf_dmd0, f->tf_dma0);
! 280: printf("dmt1 %x dmd1 %x dma1 %x\n",
! 281: f->tf_dmt1, f->tf_dmd1, f->tf_dma1);
! 282: printf("dmt2 %x dmd2 %x dma2 %x\n",
! 283: f->tf_dmt2, f->tf_dmd2, f->tf_dma2);
! 284: printf("fault type %d\n", (f->tf_dpfsr >> 16) & 0x7);
! 285: dae_print((unsigned *)f);
! 286: }
! 287: if (CPU_IS88100 && longformat != 0) {
! 288: printf("fpsr %x fpcr %x epsr %x ssbr %x\n",
! 289: f->tf_fpsr, f->tf_fpcr, f->tf_epsr, f->tf_ssbr);
! 290: printf("fpecr %x fphs1 %x fpls1 %x fphs2 %x fpls2 %x\n",
! 291: f->tf_fpecr, f->tf_fphs1, f->tf_fpls1,
! 292: f->tf_fphs2, f->tf_fpls2);
! 293: printf("fppt %x fprh %x fprl %x fpit %x\n",
! 294: f->tf_fppt, f->tf_fprh, f->tf_fprl, f->tf_fpit);
! 295: printf("vector %d mask %x mode %x scratch1 %x cpu %p\n",
! 296: f->tf_vector, f->tf_mask, f->tf_mode,
! 297: f->tf_scratch1, f->tf_cpu);
! 298: }
! 299: #endif
! 300: #ifdef M88110
! 301: if (CPU_IS88110 && longformat != 0) {
! 302: printf("fpsr %x fpcr %x fpecr %x epsr %x\n",
! 303: f->tf_fpsr, f->tf_fpcr, f->tf_fpecr, f->tf_epsr);
! 304: printf("dsap %x duap %x dsr %x dlar %x dpar %x\n",
! 305: f->tf_dsap, f->tf_duap, f->tf_dsr, f->tf_dlar, f->tf_dpar);
! 306: printf("isap %x iuap %x isr %x ilar %x ipar %x\n",
! 307: f->tf_isap, f->tf_iuap, f->tf_isr, f->tf_ilar, f->tf_ipar);
! 308: printf("vector %d mask %x mode %x scratch1 %x cpu %p\n",
! 309: f->tf_vector, f->tf_mask, f->tf_mode,
! 310: f->tf_scratch1, f->tf_cpu);
! 311: }
! 312: #endif
! 313: }
! 314: #endif /* DDB */
! 315:
! 316: /*
! 317: * Set up the cpu_info pointer and the cpu number for the current processor.
! 318: */
! 319: void
! 320: set_cpu_number(cpuid_t number)
! 321: {
! 322: struct cpu_info *ci;
! 323: extern struct pcb idle_u;
! 324:
! 325: #ifdef MULTIPROCESSOR
! 326: ci = &m88k_cpus[number];
! 327: #else
! 328: ci = &m88k_cpus[0];
! 329: #endif
! 330: ci->ci_cpuid = number;
! 331:
! 332: __asm__ __volatile__ ("stcr %0, cr17" :: "r" (ci));
! 333: flush_pipeline();
! 334:
! 335: #ifdef MULTIPROCESSOR
! 336: if (number == master_cpu)
! 337: #endif
! 338: {
! 339: ci->ci_primary = 1;
! 340: ci->ci_idle_pcb = &idle_u;
! 341:
! 342: #ifdef MULTIPROCESSOR
! 343: /*
! 344: * Specific initialization for the master processor.
! 345: */
! 346: __mp_lock_init(&sir_lock);
! 347: #endif
! 348: }
! 349:
! 350: ci->ci_alive = 1;
! 351: }
! 352:
! 353: /*
! 354: * Notify the current process (p) that it has a signal pending,
! 355: * process as soon as possible.
! 356: */
! 357: void
! 358: signotify(struct proc *p)
! 359: {
! 360: aston(p);
! 361: #ifdef MULTIPROCESSOR
! 362: if (p->p_cpu != curcpu() && p->p_cpu != NULL)
! 363: m88k_send_ipi(CI_IPI_NOTIFY, p->p_cpu->ci_cpuid);
! 364: #endif
! 365: }
! 366:
! 367: /*
! 368: * Soft interrupt interface
! 369: */
! 370:
! 371: unsigned int ssir;
! 372: int netisr;
! 373:
! 374: void
! 375: dosoftint()
! 376: {
! 377: int sir, n;
! 378:
! 379: if ((sir = ssir) == 0)
! 380: return;
! 381:
! 382: atomic_clearbits_int(&ssir, sir);
! 383: uvmexp.softs++;
! 384:
! 385: if (ISSET(sir, SIR_NET)) {
! 386: while ((n = netisr) != 0) {
! 387: atomic_clearbits_int(&netisr, n);
! 388:
! 389: #define DONETISR(bit, fn) \
! 390: do { \
! 391: if (n & (1 << bit)) \
! 392: fn(); \
! 393: } while (0)
! 394:
! 395: #include <net/netisr_dispatch.h>
! 396:
! 397: #undef DONETISR
! 398: }
! 399: }
! 400:
! 401: if (ISSET(sir, SIR_CLOCK))
! 402: softclock();
! 403: }
! 404:
! 405: int
! 406: spl0()
! 407: {
! 408: int s;
! 409:
! 410: s = setipl(IPL_SOFTCLOCK);
! 411:
! 412: dosoftint();
! 413:
! 414: setipl(IPL_NONE);
! 415: return (s);
! 416: }
! 417:
! 418: #define EMPTY_BR 0xc0000000 /* empty "br" instruction */
! 419: #define NO_OP 0xf4005800 /* "or r0, r0, r0" */
! 420:
! 421: #define BRANCH(FROM, TO) \
! 422: (EMPTY_BR | ((vaddr_t)(TO) - (vaddr_t)(FROM)) >> 2)
! 423:
! 424: #define SET_VECTOR(NUM, VALUE) \
! 425: do { \
! 426: vbr[NUM].word_one = NO_OP; \
! 427: vbr[NUM].word_two = BRANCH(&vbr[NUM].word_two, VALUE); \
! 428: } while (0)
! 429:
! 430: /*
! 431: * vector_init(vector, vector_init_list)
! 432: *
! 433: * This routine sets up the m88k vector table for the running processor.
! 434: * This is the first C code to run, before anything is initialized.
! 435: *
! 436: * It fills the exception vectors page. I would add an extra four bytes
! 437: * to the page pointed to by the vbr, since the 88100 may execute the
! 438: * first instruction of the next trap handler, as documented in its
! 439: * Errata. Processing trap #511 would then fall into the next page,
! 440: * unless the address computation wraps, or software traps can not trigger
! 441: * the issue - the Errata does not provide more detail. And since the
! 442: * MVME BUG does not add an extra NOP after their VBR page, I'll assume this
! 443: * is safe for now -- miod
! 444: */
! 445: void
! 446: vector_init(m88k_exception_vector_area *vbr, u_int32_t *vector_init_list)
! 447: {
! 448: u_int num;
! 449: u_int32_t vec;
! 450:
! 451: for (num = 0; (vec = vector_init_list[num]) != 0; num++)
! 452: SET_VECTOR(num, vec);
! 453:
! 454: switch (cputyp) {
! 455: default:
! 456: #ifdef M88110
! 457: case CPU_88110:
! 458: {
! 459: extern void m88110_sigsys(void);
! 460: extern void m88110_syscall_handler(void);
! 461: extern void m88110_cache_flush_handler(void);
! 462: extern void m88110_stepbpt(void);
! 463: extern void m88110_userbpt(void);
! 464:
! 465: for (; num < 512; num++)
! 466: SET_VECTOR(num, m88110_sigsys);
! 467:
! 468: SET_VECTOR(450, m88110_syscall_handler);
! 469: SET_VECTOR(451, m88110_cache_flush_handler);
! 470: SET_VECTOR(504, m88110_stepbpt);
! 471: SET_VECTOR(511, m88110_userbpt);
! 472: }
! 473: break;
! 474: #endif
! 475: #ifdef M88100
! 476: case CPU_88100:
! 477: {
! 478: extern void sigsys(void);
! 479: extern void syscall_handler(void);
! 480: extern void cache_flush_handler(void);
! 481: extern void stepbpt(void);
! 482: extern void userbpt(void);
! 483:
! 484: for (; num < 512; num++)
! 485: SET_VECTOR(num, sigsys);
! 486:
! 487: SET_VECTOR(450, syscall_handler);
! 488: SET_VECTOR(451, cache_flush_handler);
! 489: SET_VECTOR(504, stepbpt);
! 490: SET_VECTOR(511, userbpt);
! 491: }
! 492: break;
! 493: #endif
! 494: }
! 495:
! 496: /* GCC will by default produce explicit trap 503 for division by zero */
! 497: SET_VECTOR(503, vector_init_list[8]);
! 498: }
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