stubs.c revision 1.22.12.1
1 /* $NetBSD: stubs.c,v 1.22.12.1 2012/04/17 00:06:04 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 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 by Mark Brinicombe 21 * for the NetBSD Project. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * Routines that are temporary or do not have a home yet. 39 * 40 * Created : 17/09/94 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: stubs.c,v 1.22.12.1 2012/04/17 00:06:04 yamt Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/errno.h> 49 #include <sys/proc.h> 50 #include <sys/conf.h> 51 #include <sys/msgbuf.h> 52 #include <uvm/uvm_extern.h> 53 #include <machine/cpu.h> 54 #include <machine/intr.h> 55 #include <machine/bootconfig.h> 56 #include <machine/pcb.h> 57 #include <arm/arm32/machdep.h> 58 #include <arm/kcore.h> 59 #include <sys/kcore.h> 60 #include <sys/core.h> 61 #include <sys/exec_aout.h> 62 63 extern dev_t dumpdev; 64 65 int cpu_dump(void); 66 int cpu_dumpsize(void); 67 u_long cpu_dump_mempagecnt(void); 68 69 /* 70 * These variables are needed by /sbin/savecore 71 */ 72 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 73 int dumpsize = 0; /* pages */ 74 long dumplo = 0; /* blocks */ 75 76 struct pcb dumppcb; 77 78 /* 79 * This is called by main to set dumplo and dumpsize. 80 * Dumps always skip the first PAGE_SIZE of disk space 81 * in case there might be a disk label stored there. 82 * If there is extra space, put dump at the end to 83 * reduce the chance that swapping trashes it. 84 */ 85 86 void 87 cpu_dumpconf(void) 88 { 89 int nblks, dumpblks; /* size of dump area */ 90 91 if (dumpdev == NODEV) 92 return; 93 nblks = bdev_size(dumpdev); 94 if (nblks <= ctod(1)) 95 return; 96 97 dumpblks = cpu_dumpsize(); 98 if (dumpblks < 0) 99 goto bad; 100 dumpblks += ctod(cpu_dump_mempagecnt()); 101 102 /* If dump won't fit (incl. room for possible label), punt. */ 103 if (dumpblks > (nblks - ctod(1))) 104 goto bad; 105 106 /* Put dump at end of partition */ 107 dumplo = nblks - dumpblks; 108 109 /* dumpsize is in page units, and doesn't include headers. */ 110 dumpsize = cpu_dump_mempagecnt(); 111 return; 112 113 bad: 114 dumpsize = 0; 115 } 116 117 /* 118 * cpu_dump: dump the machine-dependent kernel core dump headers. 119 */ 120 int 121 cpu_dump(void) 122 { 123 int (*dump)(dev_t, daddr_t, void *, size_t); 124 char bf[dbtob(1)]; 125 kcore_seg_t *segp; 126 cpu_kcore_hdr_t *cpuhdrp; 127 phys_ram_seg_t *memsegp; 128 const struct bdevsw *bdev; 129 int i; 130 131 bdev = bdevsw_lookup(dumpdev); 132 if (bdev == NULL) 133 return (ENXIO); 134 dump = bdev->d_dump; 135 136 memset(bf, 0, sizeof bf); 137 segp = (kcore_seg_t *)bf; 138 cpuhdrp = (cpu_kcore_hdr_t *)&bf[ALIGN(sizeof(*segp))]; 139 memsegp = (phys_ram_seg_t *)&bf[ ALIGN(sizeof(*segp)) + 140 ALIGN(sizeof(*cpuhdrp))]; 141 142 /* 143 * Generate a segment header. 144 */ 145 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 146 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 147 148 /* 149 * Add the machine-dependent header info. 150 */ 151 cpuhdrp->version = 1; 152 cpuhdrp->PAKernelL1Table = pmap_kernel_L1_addr(); 153 cpuhdrp->UserL1TableSize = 0; 154 cpuhdrp->nmemsegs = bootconfig.dramblocks; 155 cpuhdrp->omemsegs = ALIGN(sizeof(*cpuhdrp)); 156 157 /* 158 * Fill in the memory segment descriptors. 159 */ 160 for (i = 0; i < bootconfig.dramblocks; i++) { 161 memsegp[i].start = bootconfig.dram[i].address; 162 memsegp[i].size = bootconfig.dram[i].pages * PAGE_SIZE; 163 } 164 165 return (dump(dumpdev, dumplo, bf, dbtob(1))); 166 } 167 168 /* 169 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 170 */ 171 int 172 cpu_dumpsize(void) 173 { 174 int size; 175 176 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 177 ALIGN( bootconfig.dramblocks * sizeof(phys_ram_seg_t)); 178 if (roundup(size, dbtob(1)) != dbtob(1)) 179 return (-1); 180 181 return (1); 182 } 183 184 185 /* 186 * cpu_dump_mempagecnt: calculate the size of RAM (in pages) to be dumped. 187 */ 188 u_long 189 cpu_dump_mempagecnt(void) 190 { 191 u_long i, n; 192 193 n = 0; 194 for (i = 0; i < bootconfig.dramblocks; i++) { 195 n += bootconfig.dram[i].pages; 196 } 197 198 return (n); 199 } 200 201 /* This should be moved to machdep.c */ 202 203 extern vaddr_t memhook; /* XXX */ 204 205 /* 206 * Doadump comes here after turning off memory management and 207 * getting on the dump stack, either when called above, or by 208 * the auto-restart code. 209 */ 210 void dodumpsys(void); 211 212 void 213 dodumpsys(void) 214 { 215 const struct bdevsw *bdev; 216 daddr_t blkno; 217 int psize; 218 int error; 219 int addr; 220 int block; 221 int len; 222 vaddr_t dumpspace; 223 224 /* flush everything out of caches */ 225 cpu_dcache_wbinv_all(); 226 227 if (dumpdev == NODEV) 228 return; 229 if (dumpsize == 0) { 230 cpu_dumpconf(); 231 } 232 if (dumplo <= 0 || dumpsize == 0) { 233 printf("\ndump to dev %u,%u not possible\n", 234 major(dumpdev), minor(dumpdev)); 235 delay(5000000); 236 return; 237 } 238 printf("\ndumping to dev %u,%u offset %ld\n", 239 major(dumpdev), minor(dumpdev), dumplo); 240 241 242 bdev = bdevsw_lookup(dumpdev); 243 if (bdev == NULL || bdev->d_psize == NULL) 244 return; 245 psize = bdev_size(dumpdev); 246 printf("dump "); 247 if (psize == -1) { 248 printf("area unavailable\n"); 249 return; 250 } 251 252 if ((error = cpu_dump()) != 0) 253 goto err; 254 255 blkno = dumplo + cpu_dumpsize(); 256 dumpspace = memhook; 257 error = 0; 258 len = 0; 259 260 for (block = 0; block < bootconfig.dramblocks && error == 0; ++block) { 261 addr = bootconfig.dram[block].address; 262 for (;addr < (bootconfig.dram[block].address 263 + (bootconfig.dram[block].pages * PAGE_SIZE)); 264 addr += PAGE_SIZE) { 265 if ((len % (1024*1024)) == 0) 266 printf("%d ", len / (1024*1024)); 267 268 pmap_kenter_pa(dumpspace, addr, VM_PROT_READ, 0); 269 pmap_update(pmap_kernel()); 270 error = (*bdev->d_dump)(dumpdev, 271 blkno, (void *) dumpspace, PAGE_SIZE); 272 273 if (error) goto err; 274 blkno += btodb(PAGE_SIZE); 275 len += PAGE_SIZE; 276 } 277 } 278 err: 279 switch (error) { 280 case ENXIO: 281 printf("device bad\n"); 282 break; 283 284 case EFAULT: 285 printf("device not ready\n"); 286 break; 287 288 case EINVAL: 289 printf("area improper\n"); 290 break; 291 292 case EIO: 293 printf("i/o error\n"); 294 break; 295 296 case EINTR: 297 printf("aborted from console\n"); 298 break; 299 300 case 0: 301 printf("succeeded\n"); 302 break; 303 304 default: 305 printf("error %d\n", error); 306 break; 307 } 308 printf("\n\n"); 309 delay(5000000); 310 } 311 312 /* End of stubs.c */ 313
Indexes created Fri Oct 17 17:09:57 GMT 2025