sys/arch/evbppc/explora/machdep.c

   1 /*      $NetBSD: machdep.c,v 1.28 2009/11/26 00:19:16 matt Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Juergen Hannken-Illjes.
   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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.28 2009/11/26 00:19:16 matt Exp $");
  34
  35 #include "opt_explora.h"
  36 #include "opt_modular.h"
  37 #include "ksyms.h"
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/buf.h>
  42 #include <sys/msgbuf.h>
  43 #include <sys/kernel.h>
  44 #include <sys/mount.h>
  45 #include <sys/proc.h>
  46 #include <sys/reboot.h>
  47 #include <sys/ksyms.h>
  48 #include <sys/device.h>
  49
  50 #include <uvm/uvm_extern.h>
  51
  52 #include <prop/proplib.h>
  53
  54 #include <machine/explora.h>
  55 #include <machine/bus.h>
  56 #include <machine/powerpc.h>
  57 #include <machine/tlb.h>
  58 #include <machine/trap.h>
  59
  60 #include <powerpc/spr.h>
  61 #include <powerpc/ibm4xx/dcr403cgx.h>
  62
  63 #if NKSYMS || defined(DDB) || defined(MODULAR)
  64 #include <machine/db_machdep.h>
  65 #include <ddb/db_extern.h>
  66 #endif
  67
  68 #define MEMREGIONS      2
  69 #define TLB_PG_SIZE     (16*1024*1024)
  70
  71 char cpu_model[80];
  72 char machine[] = MACHINE;               /* from <machine/param.h> */
  73 char machine_arch[] = MACHINE_ARCH;     /* from <machine/param.h> */
  74
  75 static const unsigned int cpuspeed = 66000000;
  76
  77 prop_dictionary_t board_properties;
  78 struct vm_map *phys_map = NULL;
  79 struct vm_map *mb_map = NULL;
  80 char msgbuf[MSGBUFSIZE];
  81 paddr_t msgbuf_paddr;
  82
  83 static struct mem_region phys_mem[MEMREGIONS];
  84 static struct mem_region avail_mem[MEMREGIONS];
  85
  86 void            bootstrap(u_int, u_int);
  87 static void     install_extint(void (*)(void));
  88 int             lcsplx(int);
  89
  90 /*
  91  * Trap vectors
  92  */
  93 extern int defaulttrap, defaultsize;
  94 extern int sctrap, scsize;
  95 extern int alitrap, alisize;
  96 extern int dsitrap, dsisize;
  97 extern int isitrap, isisize;
  98 extern int mchktrap, mchksize;
  99 extern int tlbimiss4xx, tlbim4size;
 100 extern int tlbdmiss4xx, tlbdm4size;
 101 extern int pitfitwdog, pitfitwdogsize;
 102 extern int debugtrap, debugsize;
 103 extern int errata51handler, errata51size;
 104 #ifdef DDB
 105 extern int ddblow, ddbsize;
 106 #endif
 107 static struct {
 108         int vector;
 109         void *addr;
 110         void *size;
 111 } trap_table[] = {
 112         { EXC_SC,       &sctrap,        &scsize },
 113         { EXC_ALI,      &alitrap,       &alisize },
 114         { EXC_DSI,      &dsitrap,       &dsisize },
 115         { EXC_ISI,      &isitrap,       &isisize },
 116         { EXC_MCHK,     &mchktrap,      &mchksize },
 117         { EXC_ITMISS,   &tlbimiss4xx,   &tlbim4size },
 118         { EXC_DTMISS,   &tlbdmiss4xx,   &tlbdm4size },
 119         { EXC_PIT,      &pitfitwdog,    &pitfitwdogsize },
 120         { EXC_DEBUG,    &debugtrap,     &debugsize },
 121         { (EXC_DTMISS|EXC_ALI), &errata51handler, &errata51size },
 122 #if defined(DDB)
 123         { EXC_PGM,      &ddblow,        &ddbsize },
 124 #endif /* DDB */
 125 };
 126
 127 /*
 128  * Install a trap vector. We cannot use memcpy because the
 129  * destination may be zero.
 130  */
 131 static void
 132 trap_copy(void *src, int dest, size_t len)
 133 {
 134         uint32_t *src_p = src;
 135         uint32_t *dest_p = (void *)dest;
 136
 137         while (len > 0) {
 138                 *dest_p++ = *src_p++;
 139                 len -= sizeof(uint32_t);
 140         }
 141 }
 142
 143 void
 144 bootstrap(u_int startkernel, u_int endkernel)
 145 {
 146         u_int i, j, t, br[4];
 147         u_int maddr, msize, size;
 148         struct cpu_info * const ci = &cpu_info[0];
 149
 150         br[0] = mfdcr(DCR_BR4);
 151         br[1] = mfdcr(DCR_BR5);
 152         br[2] = mfdcr(DCR_BR6);
 153         br[3] = mfdcr(DCR_BR7);
 154
 155         for (i = 0; i < 4; i++)
 156                 for (j = i+1; j < 4; j++)
 157                         if (br[j] < br[i])
 158                                 t = br[j], br[j] = br[i], br[i] = t;
 159
 160         for (i = 0, size = 0; i < 4; i++) {
 161                 if (((br[i] >> 19) & 3) != 3)
 162                         continue;
 163                 maddr = ((br[i] >> 24) & 0xff) << 20;
 164                 msize = 1 << (20 + ((br[i] >> 21) & 7));
 165                 if (maddr+msize > size)
 166                         size = maddr+msize;
 167         }
 168
 169         phys_mem[0].start = 0;
 170         phys_mem[0].size = size & ~PGOFSET;
 171         avail_mem[0].start = startkernel;
 172         avail_mem[0].size = size-startkernel;
 173
 174         __asm volatile(
 175             "   mtpid %0        \n"
 176             "   sync            \n"
 177             : : "r" (KERNEL_PID) );
 178
 179         /*
 180          * Setup initial tlbs.
 181          * Kernel memory and console device are
 182          * mapped into the first (reserved) tlbs.
 183          */
 184
 185         for (maddr = 0; maddr < endkernel; maddr += TLB_PG_SIZE)
 186                 ppc4xx_tlb_reserve(maddr, maddr, TLB_PG_SIZE, TLB_EX);
 187
 188         /* Map PCKBC, PCKBC2, COM, LPT. This is far beyond physmem. */
 189         ppc4xx_tlb_reserve(BASE_ISA, BASE_ISA, TLB_PG_SIZE, TLB_I | TLB_G);
 190
 191 #ifndef COM_IS_CONSOLE
 192         ppc4xx_tlb_reserve(BASE_FB,  BASE_FB,  TLB_PG_SIZE, TLB_I | TLB_G);
 193         ppc4xx_tlb_reserve(BASE_FB2, BASE_FB2, TLB_PG_SIZE, TLB_I | TLB_G);
 194 #endif
 195
 196         consinit();
 197
 198         /* Disable all external interrupts */
 199         mtdcr(DCR_EXIER, 0);
 200
 201         /* Disable all timer interrupts */
 202         mtspr(SPR_TCR, 0);
 203
 204         /* Initialize cache info for memcpy, etc. */
 205         cpu_probe_cache();
 206
 207         /*
 208          * Initialize lwp0 and current pcb and pmap pointers.
 209          */
 210         lwp0.l_cpu = ci;
 211
 212         curpcb = lwp_getpcb(&lwp0);
 213         memset(curpcb, 0, sizeof(struct pcb));  /* XXX why? */
 214         curpcb->pcb_pm = pmap_kernel();
 215
 216         /*
 217          * Install trap vectors.
 218          */
 219
 220         for (i = EXC_RSVD; i <= EXC_LAST; i += 0x100)
 221                 trap_copy(&defaulttrap, i, (size_t)&defaultsize);
 222
 223         for (i = 0; i < sizeof(trap_table)/sizeof(trap_table[0]); i++) {
 224                 trap_copy(trap_table[i].addr, trap_table[i].vector,
 225                     (size_t)trap_table[i].size);
 226         }
 227
 228         __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100);
 229
 230         /*
 231          * Set Exception vector base.
 232          * Handle trap instruction as PGM exception.
 233          */
 234
 235         mtspr(SPR_EVPR, 0);
 236
 237         t = mfspr(SPR_DBCR0);
 238         t &= ~DBCR0_TDE;
 239         mtspr(SPR_DBCR0, t);
 240
 241         /*
 242          * External interrupt handler install.
 243          */
 244
 245         install_extint(ext_intr);
 246
 247         /*
 248          * Now enable translation (and machine checks/recoverable interrupts).
 249          */
 250         __asm volatile (
 251             "   mfmsr %0        \n"
 252             "   ori %0,%0,%1    \n"
 253             "   mtmsr %0        \n"
 254             "   sync            \n"
 255             : : "r" (0), "K" (PSL_IR|PSL_DR|PSL_ME) );
 256
 257         uvm_setpagesize();
 258
 259         /*
 260          * Initialize pmap module.
 261          */
 262         pmap_bootstrap(startkernel, endkernel);
 263         fake_mapiodev = 0;
 264 }
 265
 266 static void
 267 install_extint(void (*handler)(void))
 268 {
 269         extern int extint, extsize;
 270         extern u_long extint_call;
 271         u_long offset = (u_long)handler - (u_long)&extint_call;
 272         int omsr, msr;
 273
 274 #ifdef  DIAGNOSTIC
 275         if (offset > 0x1ffffff)
 276                 panic("install_extint: too far away");
 277 #endif
 278         __asm volatile (
 279             "   mfmsr %0        \n"
 280             "   andi. %1,%0,%2  \n"
 281             "   mtmsr %1        \n"
 282             : "=r" (omsr), "=r" (msr) : "K" ((u_short)~PSL_EE) );
 283         extint_call = (extint_call & 0xfc000003) | offset;
 284         memcpy((void *)EXC_EXI, &extint, (size_t)&extsize);
 285         __syncicache((void *)&extint_call, sizeof extint_call);
 286         __syncicache((void *)EXC_EXI, (int)&extsize);
 287         __asm volatile (
 288             "   mtmsr %0        \n"
 289             : : "r" (omsr) );
 290 }
 291
 292 void
 293 cpu_startup(void)
 294 {
 295         vaddr_t minaddr, maxaddr;
 296         prop_number_t pn;
 297         char pbuf[9];
 298
 299         /*
 300          * Initialize error message buffer (before start of kernel)
 301          */
 302         initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
 303
 304         printf("%s%s", copyright, version);
 305         printf("NCD Explora451\n");
 306
 307         format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
 308         printf("total memory = %s\n", pbuf);
 309
 310         minaddr = 0;
 311         /*
 312          * Allocate a submap for physio
 313          */
 314         phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
 315                                  VM_PHYS_SIZE, 0, false, NULL);
 316
 317         /*
 318          * No need to allocate an mbuf cluster submap.  Mbuf clusters
 319          * are allocated via the pool allocator, and we use direct-mapped
 320          * pool pages.
 321          */
 322
 323         format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
 324         printf("avail memory = %s\n", pbuf);
 325
 326         /*
 327          * Set up the board properties database.
 328          */
 329         board_properties = prop_dictionary_create();
 330         KASSERT(board_properties != NULL);
 331
 332         pn = prop_number_create_integer(ctob(physmem));
 333         KASSERT(pn != NULL);
 334         if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
 335                 panic("setting mem-size");
 336         prop_object_release(pn);
 337
 338         pn = prop_number_create_integer(cpuspeed);
 339         KASSERT(pn != NULL);
 340         if (prop_dictionary_set(board_properties, "processor-frequency",
 341                                 pn) == false)
 342                 panic("setting processor-frequency");
 343         prop_object_release(pn);
 344
 345         intr_init();
 346 }
 347
 348 int
 349 lcsplx(int ipl)
 350 {
 351         return spllower(ipl);   /*XXX*/
 352 }
 353
 354 void
 355 cpu_reboot(int howto, char *what)
 356 {
 357         static int syncing = 0;
 358
 359         boothowto = howto;
 360         if (!cold && !(howto & RB_NOSYNC) && !syncing) {
 361                 syncing = 1;
 362                 vfs_shutdown();
 363                 resettodr();
 364         }
 365
 366         splhigh();
 367
 368         if (!cold && (howto & RB_DUMP))
 369                 /*XXX dumpsys()*/;
 370
 371         doshutdownhooks();
 372
 373         pmf_system_shutdown(boothowto);
 374
 375         if (howto & RB_HALT) {
 376                 printf("halted\n\n");
 377
 378                 while (1)
 379                         ;
 380         }
 381
 382         printf("rebooting\n\n");
 383
 384         /* flush cache for msgbuf */
 385         __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE));
 386
 387         ppc4xx_reset();
 388
 389 #ifdef DDB
 390         while (1)
 391                 Debugger();
 392 #else
 393         while (1)
 394                 ;
 395 #endif
 396 }
 397
 398 void
 399 mem_regions(struct mem_region **mem, struct mem_region **avail)
 400 {
 401         *mem = phys_mem;
 402         *avail = avail_mem;
 403 }