sys/arch/powerpc/ibm4xx/ibm4xx_machdep.c

   1 /*      $NetBSD: ibm4xx_machdep.c,v 1.11 2009/11/26 00:19:20 matt Exp $ */
   2 /*      Original: ibm40x_machdep.c,v 1.3 2005/01/17 17:19:36 shige Exp $ */
   3
   4 /*
   5  * Copyright 2001, 2002 Wasabi Systems, Inc.
   6  * All rights reserved.
   7  *
   8  * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed for the NetBSD Project by
  21  *      Wasabi Systems, Inc.
  22  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  23  *    or promote products derived from this software without specific prior
  24  *    written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  36  * POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 /*
  40  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
  41  * Copyright (C) 1995, 1996 TooLs GmbH.
  42  * All rights reserved.
  43  *
  44  * Redistribution and use in source and binary forms, with or without
  45  * modification, are permitted provided that the following conditions
  46  * are met:
  47  * 1. Redistributions of source code must retain the above copyright
  48  *    notice, this list of conditions and the following disclaimer.
  49  * 2. Redistributions in binary form must reproduce the above copyright
  50  *    notice, this list of conditions and the following disclaimer in the
  51  *    documentation and/or other materials provided with the distribution.
  52  * 3. All advertising materials mentioning features or use of this software
  53  *    must display the following acknowledgement:
  54  *      This product includes software developed by TooLs GmbH.
  55  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  56  *    derived from this software without specific prior written permission.
  57  *
  58  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
  59  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  60  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  61  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  62  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  63  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  64  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  65  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  66  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  67  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  68  */
  69
  70 #include <sys/cdefs.h>
  71 __KERNEL_RCSID(0, "$NetBSD: ibm4xx_machdep.c,v 1.11 2009/11/26 00:19:20 matt Exp $");
  72
  73 #include "opt_compat_netbsd.h"
  74 #include "opt_ddb.h"
  75 #include "opt_kgdb.h"
  76 #include "opt_ipkdb.h"
  77
  78 #include <sys/param.h>
  79 #include <sys/msgbuf.h>
  80 #include <sys/proc.h>
  81
  82 #include <uvm/uvm_extern.h>
  83
  84 #if defined(DDB)
  85 #include <machine/db_machdep.h>
  86 #include <ddb/db_extern.h>
  87 #endif
  88
  89 #if defined(KGDB)
  90 #include <sys/kgdb.h>
  91 #endif
  92
  93 #if defined(IPKDB)
  94 #include <ipkdb/ipkdb.h>
  95 #endif
  96
  97 #include <machine/powerpc.h>
  98 #include <powerpc/spr.h>
  99 #include <machine/trap.h>
 100
 101 /*
 102  * Global variables used here and there
 103  */
 104 paddr_t msgbuf_paddr;
 105 vaddr_t msgbuf_vaddr;
 106 char msgbuf[MSGBUFSIZE];
 107
 108 /*
 109  * ibm4xx_init:
 110  */
 111 void
 112 ibm4xx_init(void (*handler)(void))
 113 {
 114         extern int defaulttrap, defaultsize;
 115         extern int sctrap, scsize;
 116         extern int alitrap, alisize;
 117         extern int dsitrap, dsisize;
 118         extern int isitrap, isisize;
 119         extern int mchktrap, mchksize;
 120         extern int tlbimiss4xx, tlbim4size;
 121         extern int tlbdmiss4xx, tlbdm4size;
 122         extern int pitfitwdog, pitfitwdogsize;
 123         extern int debugtrap, debugsize;
 124         extern int errata51handler, errata51size;
 125 #ifdef DDB
 126         extern int ddblow, ddbsize;
 127 #endif
 128 #ifdef IPKDB
 129         extern int ipkdblow, ipkdbsize;
 130 #endif
 131         uintptr_t exc;
 132         struct cpu_info * const ci = curcpu();
 133
 134         /* Initialize cache info for memcpy, etc. */
 135         cpu_probe_cache();
 136
 137         /*
 138          * Initialize lwp0 and current pcb and pmap pointers.
 139          */
 140         KASSERT(ci != NULL);
 141         KASSERT(curcpu() == ci);
 142         lwp0.l_cpu = ci;
 143
 144         curpcb = lwp_getpcb(&lwp0);
 145         memset(curpcb, 0, sizeof(struct pcb));
 146
 147         curpcb->pcb_pm = pmap_kernel();
 148
 149         /*
 150          * Set up trap vectors
 151          */
 152         for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100)
 153                 switch (exc) {
 154                 default:
 155                         memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize);
 156                         break;
 157                 case EXC_EXI:
 158                         /*
 159                          * This one is (potentially) installed during autoconf
 160                          */
 161                         break;
 162                 case EXC_SC:
 163                         memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize);
 164                         break;
 165                 case EXC_ALI:
 166                         memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize);
 167                         break;
 168                 case EXC_DSI:
 169                         memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize);
 170                         break;
 171                 case EXC_ISI:
 172                         memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize);
 173                         break;
 174                 case EXC_MCHK:
 175                         memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize);
 176                         break;
 177                 case EXC_ITMISS:
 178                         memcpy((void *)EXC_ITMISS, &tlbimiss4xx,
 179                                 (size_t)&tlbim4size);
 180                         break;
 181                 case EXC_DTMISS:
 182                         memcpy((void *)EXC_DTMISS, &tlbdmiss4xx,
 183                                 (size_t)&tlbdm4size);
 184                         break;
 185                 /*
 186                  * EXC_PIT, EXC_FIT, EXC_WDOG handlers
 187                  * are spaced by 0x10 bytes only..
 188                  */
 189                 case EXC_PIT:
 190                         memcpy((void *)EXC_PIT, &pitfitwdog,
 191                                 (size_t)&pitfitwdogsize);
 192                         break;
 193                 case EXC_DEBUG:
 194                         memcpy((void *)EXC_DEBUG, &debugtrap,
 195                                 (size_t)&debugsize);
 196                         break;
 197                 case EXC_DTMISS|EXC_ALI:
 198                         /* PPC405GP Rev D errata item 51 */
 199                         memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler,
 200                                 (size_t)&errata51size);
 201                         break;
 202 #if defined(DDB) || defined(IPKDB)
 203                 case EXC_PGM:
 204 #if defined(DDB)
 205                         memcpy((void *)exc, &ddblow, (size_t)&ddbsize);
 206 #elif defined(IPKDB)
 207                         memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize);
 208 #endif
 209 #endif /* DDB | IPKDB */
 210                         break;
 211                 }
 212
 213         __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100);
 214         mtspr(SPR_EVPR, 0);             /* Set Exception vector base */
 215
 216         consinit();
 217
 218         /* Handle trap instruction as PGM exception */
 219         {
 220           int dbcr0;
 221           __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0));
 222           __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE));
 223         }
 224
 225         /*
 226          * external interrupt handler install
 227          */
 228         if (handler)
 229             ibm4xx_install_extint(handler);
 230
 231         /*
 232          * Now enable translation (and machine checks/recoverable interrupts).
 233          */
 234         __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync"
 235                       : : "r"(0), "K"(PSL_IR|PSL_DR));
 236         /* XXXX PSL_ME - With ME set kernel gets stuck... */
 237
 238         KASSERT(curcpu() == ci);
 239 }
 240
 241 void
 242 ibm4xx_install_extint(void (*handler)(void))
 243 {
 244         extern int extint, extsize;
 245         extern u_long extint_call;
 246         u_long offset = (u_long)handler - (u_long)&extint_call;
 247         int msr;
 248
 249 #ifdef  DIAGNOSTIC
 250         if (offset > 0x1ffffff)
 251                 panic("install_extint: too far away");
 252 #endif
 253         __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr));
 254         extint_call = (extint_call & 0xfc000003) | offset;
 255         memcpy((void *)EXC_EXI, &extint, (size_t)&extsize);
 256         __syncicache((void *)&extint_call, sizeof extint_call);
 257         __syncicache((void *)EXC_EXI, (int)&extsize);
 258         __asm volatile ("mtmsr %0" :: "r"(msr));
 259 }
 260
 261 /*
 262  * ibm4xx_cpu_startup:
 263  * Machine dependent startup code.
 264  */
 265 void
 266 ibm4xx_cpu_startup(const char *model)
 267 {
 268         vaddr_t minaddr, maxaddr;
 269         char pbuf[9];
 270
 271         KASSERT(curcpu() != NULL);
 272         KASSERT(lwp0.l_cpu != NULL);
 273         KASSERT(curcpu()->ci_intstk != 0);
 274         KASSERT(curcpu()->ci_intrdepth == -1);
 275
 276         /*
 277          * Initialize error message buffer (at end of core).
 278          */
 279 #if 0   /* For some reason this fails... --Artem
 280          * Besides, do we really have to put it at the end of core?
 281          * Let's use static buffer for now
 282          */
 283         if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE),
 284             0, UVM_KMF_VAONLY)))
 285                 panic("startup: no room for message buffer");
 286         for (i = 0; i < btoc(MSGBUFSIZE); i++)
 287                 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE,
 288                     msgbuf_paddr + i * PAGE_SIZE,
 289                     VM_PROT_READ|VM_PROT_WRITE, 0);
 290         initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE));
 291 #else
 292         initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
 293 #endif
 294
 295         printf("%s%s", copyright, version);
 296         if (model != NULL)
 297                 printf("Model: %s\n", model);
 298
 299         format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
 300         printf("total memory = %s\n", pbuf);
 301
 302         minaddr = 0;
 303         /*
 304          * Allocate a submap for physio
 305          */
 306         phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
 307                                  VM_PHYS_SIZE, 0, false, NULL);
 308
 309         /*
 310          * No need to allocate an mbuf cluster submap.  Mbuf clusters
 311          * are allocated via the pool allocator, and we use direct-mapped
 312          * pool pages.
 313          */
 314
 315         format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
 316         printf("avail memory = %s\n", pbuf);
 317 }
 318
 319 /*
 320  * ibm4xx_dumpsys:
 321  * Crash dump handling.
 322  */
 323 void
 324 ibm4xx_dumpsys(void)
 325 {
 326
 327         printf("dumpsys: TBD\n");
 328 }