dump_machdep.c

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    1 /*-
    2  * Copyright (c) 2002 Marcel Moolenaar
    3  * Copyright (c) 2002 Thomas Moestl
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  *
   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  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/conf.h>
   34 #include <sys/cons.h>
   35 #include <sys/kernel.h>
   36 #include <sys/kerneldump.h>
   37 
   38 #include <vm/vm.h>
   39 #include <vm/vm_param.h>
   40 #include <vm/pmap.h>
   41 
   42 #include <machine/metadata.h>
   43 #include <machine/kerneldump.h>
   44 #include <machine/ofw_mem.h>
   45 #include <machine/tsb.h>
   46 #include <machine/tlb.h>
   47 
   48 CTASSERT(sizeof(struct kerneldumpheader) == DEV_BSIZE);
   49 
   50 static struct kerneldumpheader kdh;
   51 static off_t dumplo, dumppos;
   52 
   53 /* Handle buffered writes. */
   54 static char buffer[DEV_BSIZE];
   55 static vm_size_t fragsz;
   56 
   57 #define MAXDUMPSZ       (MAXDUMPPGS << PAGE_SHIFT)
   58 
   59 static int
   60 buf_write(struct dumperinfo *di, char *ptr, size_t sz)
   61 {
   62         size_t len;
   63         int error;
   64 
   65         while (sz) {
   66                 len = DEV_BSIZE - fragsz;
   67                 if (len > sz)
   68                         len = sz;
   69                 bcopy(ptr, buffer + fragsz, len);
   70                 fragsz += len;
   71                 ptr += len;
   72                 sz -= len;
   73                 if (fragsz == DEV_BSIZE) {
   74                         error = dump_write(di, buffer, 0, dumplo,
   75                             DEV_BSIZE);
   76                         if (error)
   77                                 return error;
   78                         dumplo += DEV_BSIZE;
   79                         fragsz = 0;
   80                 }
   81         }
   82 
   83         return (0);
   84 }
   85 
   86 static int
   87 buf_flush(struct dumperinfo *di)
   88 {
   89         int error;
   90 
   91         if (fragsz == 0)
   92                 return (0);
   93 
   94         error = dump_write(di, buffer, 0, dumplo, DEV_BSIZE);
   95         dumplo += DEV_BSIZE;
   96         fragsz = 0;
   97         return (error);
   98 }
   99 
  100 static int
  101 reg_write(struct dumperinfo *di, vm_paddr_t pa, vm_size_t size)
  102 {
  103         struct sparc64_dump_reg r;
  104 
  105         r.dr_pa = pa;
  106         r.dr_size = size;
  107         r.dr_offs = dumppos;
  108         dumppos += size;
  109         return (buf_write(di, (char *)&r, sizeof(r)));
  110 }
  111 
  112 static int
  113 blk_dump(struct dumperinfo *di, vm_paddr_t pa, vm_size_t size)
  114 {
  115         vm_size_t pos, rsz;
  116         vm_offset_t va;
  117         int c, counter, error, twiddle;
  118 
  119         printf("  chunk at %#lx: %ld bytes ", (u_long)pa, (long)size);
  120 
  121         va = 0L;
  122         error = counter = twiddle = 0;
  123         for (pos = 0; pos < size; pos += MAXDUMPSZ, counter++) {
  124                 if (counter % 128 == 0)
  125                         printf("%c\b", "|/-\\"[twiddle++ & 3]);
  126                 rsz = size - pos;
  127                 rsz = (rsz > MAXDUMPSZ) ? MAXDUMPSZ : rsz;
  128                 va = TLB_PHYS_TO_DIRECT(pa + pos);
  129                 error = dump_write(di, (void *)va, 0, dumplo, rsz);
  130                 if (error)
  131                         break;
  132                 dumplo += rsz;
  133 
  134                 /* Check for user abort. */
  135                 c = cncheckc();
  136                 if (c == 0x03)
  137                         return (ECANCELED);
  138                 if (c != -1)
  139                         printf("(CTRL-C to abort)  ");
  140         }
  141         printf("... %s\n", (error) ? "fail" : "ok");
  142         return (error);
  143 }
  144 
  145 void
  146 dumpsys(struct dumperinfo *di)
  147 {
  148         struct sparc64_dump_hdr hdr;
  149         vm_size_t size, totsize, hdrsize;
  150         int error, i, nreg;
  151 
  152         /* Calculate dump size. */
  153         size = 0;
  154         nreg = sparc64_nmemreg;
  155         for (i = 0; i < sparc64_nmemreg; i++)
  156                 size += sparc64_memreg[i].mr_size;
  157         /* Account for the header size. */
  158         hdrsize = roundup2(sizeof(hdr) + sizeof(struct sparc64_dump_reg) * nreg,
  159             DEV_BSIZE);
  160         size += hdrsize;
  161 
  162         totsize = size + 2 * sizeof(kdh);
  163         if (totsize > di->mediasize) {
  164                 printf("Insufficient space on device (need %ld, have %ld), "
  165                     "refusing to dump.\n", (long)totsize,
  166                     (long)di->mediasize);
  167                 error = ENOSPC;
  168                 goto fail;
  169         }
  170 
  171         /* Determine dump offset on device. */
  172         dumplo = di->mediaoffset + di->mediasize - totsize;
  173 
  174         mkdumpheader(&kdh, KERNELDUMPMAGIC, KERNELDUMP_SPARC64_VERSION, size,
  175             di->blocksize);
  176 
  177         printf("Dumping %lu MB (%d chunks)\n", (u_long)(size >> 20), nreg);
  178 
  179         /* Dump leader */
  180         error = dump_write(di, &kdh, 0, dumplo, sizeof(kdh));
  181         if (error)
  182                 goto fail;
  183         dumplo += sizeof(kdh);
  184 
  185         /* Dump the private header. */
  186         hdr.dh_hdr_size = hdrsize;
  187         hdr.dh_tsb_pa = tsb_kernel_phys;
  188         hdr.dh_tsb_size = tsb_kernel_size;
  189         hdr.dh_tsb_mask = tsb_kernel_mask;
  190         hdr.dh_nregions = nreg;
  191 
  192         if (buf_write(di, (char *)&hdr, sizeof(hdr)) != 0)
  193                 goto fail;
  194 
  195         dumppos = hdrsize;
  196         /* Now, write out the region descriptors. */
  197         for (i = 0; i < sparc64_nmemreg; i++) {
  198                 error = reg_write(di, sparc64_memreg[i].mr_start,
  199                     sparc64_memreg[i].mr_size);
  200                 if (error != 0)
  201                         goto fail;
  202         }
  203         buf_flush(di);
  204 
  205         /* Dump memory chunks. */
  206         for (i = 0; i < sparc64_nmemreg; i++) {
  207                 error = blk_dump(di, sparc64_memreg[i].mr_start,
  208                     sparc64_memreg[i].mr_size);
  209                 if (error != 0)
  210                         goto fail;
  211         }
  212 
  213         /* Dump trailer */
  214         error = dump_write(di, &kdh, 0, dumplo, sizeof(kdh));
  215         if (error)
  216                 goto fail;
  217 
  218         /* Signal completion, signoff and exit stage left. */
  219         dump_write(di, NULL, 0, 0, 0);
  220         printf("\nDump complete\n");
  221         return;
  222 
  223  fail:
  224         /* XXX It should look more like VMS :-) */
  225         printf("** DUMP FAILED (ERROR %d) **\n", error);
  226 }

Cache object: b68d4195e11a8575b71d21c60f84c54d

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FreeBSD/Linux Kernel Cross Reference sys/sparc64/sparc64/dump_machdep.c

FreeBSD/Linux Kernel Cross Reference
sys/sparc64/sparc64/dump_machdep.c