sys/boot/sparc64/loader/metadata.c

   1 /*-
   2  * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  *      from: FreeBSD: src/sys/boot/i386/libi386/bootinfo.c,v 1.29
  27  * $FreeBSD: src/sys/boot/sparc64/loader/metadata.c,v 1.9 2003/04/30 22:00:16 peter Exp $
  28  * $DragonFly: src/sys/boot/sparc64/loader/metadata.c,v 1.1 2003/11/10 06:08:40 dillon Exp $
  29  */
  30
  31 #include <stand.h>
  32 #include <sys/param.h>
  33 #include <sys/reboot.h>
  34 #include <sys/linker.h>
  35
  36 #include <machine/metadata.h>
  37
  38 #include "bootstrap.h"
  39 #include "libofw.h"
  40
  41 extern struct tlb_entry *dtlb_store;
  42 extern struct tlb_entry *itlb_store;
  43
  44 extern int dtlb_slot;
  45 extern int itlb_slot;
  46
  47 /*
  48  * Return a 'boothowto' value corresponding to the kernel arguments in
  49  * (kargs) and any relevant environment variables.
  50  */
  51 static struct
  52 {
  53     const char  *ev;
  54     int         mask;
  55 } howto_names[] = {
  56     {"boot_askname",    RB_ASKNAME},
  57     {"boot_cdrom",      RB_CDROM},
  58     {"boot_userconfig", RB_CONFIG},
  59     {"boot_ddb",        RB_KDB},
  60     {"boot_gdb",        RB_GDB},
  61     {"boot_single",     RB_SINGLE},
  62     {"boot_verbose",    RB_VERBOSE},
  63     {"boot_multicons",  RB_MULTIPLE},
  64     {"boot_serial",     RB_SERIAL},
  65     {NULL,      0}
  66 };
  67
  68 int
  69 md_getboothowto(char *kargs)
  70 {
  71     char        *cp;
  72     int         howto;
  73     int         active;
  74     int         i;
  75
  76     /* Parse kargs */
  77     howto = 0;
  78     if (kargs != NULL) {
  79         cp = kargs;
  80         active = 0;
  81         while (*cp != 0) {
  82             if (!active && (*cp == '-')) {
  83                 active = 1;
  84             } else if (active)
  85                 switch (*cp) {
  86                 case 'a':
  87                     howto |= RB_ASKNAME;
  88                     break;
  89                 case 'c':
  90                     howto |= RB_CONFIG;
  91                     break;
  92                 case 'C':
  93                     howto |= RB_CDROM;
  94                     break;
  95                 case 'd':
  96                     howto |= RB_KDB;
  97                     break;
  98                 case 'D':
  99                     howto |= RB_MULTIPLE;
 100                     break;
 101                 case 'm':
 102                     howto |= RB_MUTE;
 103                     break;
 104                 case 'g':
 105                     howto |= RB_GDB;
 106                     break;
 107                 case 'h':
 108                     howto |= RB_SERIAL;
 109                     break;
 110                 case 'r':
 111                     howto |= RB_DFLTROOT;
 112                     break;
 113                 case 's':
 114                     howto |= RB_SINGLE;
 115                     break;
 116                 case 'v':
 117                     howto |= RB_VERBOSE;
 118                     break;
 119                 default:
 120                     active = 0;
 121                     break;
 122                 }
 123             cp++;
 124         }
 125     }
 126     /* get equivalents from the environment */
 127     for (i = 0; howto_names[i].ev != NULL; i++)
 128         if (getenv(howto_names[i].ev) != NULL)
 129             howto |= howto_names[i].mask;
 130     if (!strcmp(getenv("console"), "comconsole"))
 131         howto |= RB_SERIAL;
 132     if (!strcmp(getenv("console"), "nullconsole"))
 133         howto |= RB_MUTE;
 134     return(howto);
 135 }
 136
 137 /*
 138  * Copy the environment into the load area starting at (addr).
 139  * Each variable is formatted as <name>=<value>, with a single nul
 140  * separating each variable, and a double nul terminating the environment.
 141  */
 142 vm_offset_t
 143 md_copyenv(vm_offset_t addr)
 144 {
 145     struct env_var      *ep;
 146
 147     /* traverse the environment */
 148     for (ep = environ; ep != NULL; ep = ep->ev_next) {
 149         archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name));
 150         addr += strlen(ep->ev_name);
 151         archsw.arch_copyin("=", addr, 1);
 152         addr++;
 153         if (ep->ev_value != NULL) {
 154             archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value));
 155             addr += strlen(ep->ev_value);
 156         }
 157         archsw.arch_copyin("", addr, 1);
 158         addr++;
 159     }
 160     archsw.arch_copyin("", addr, 1);
 161     addr++;
 162     return(addr);
 163 }
 164
 165 /*
 166  * Copy module-related data into the load area, where it can be
 167  * used as a directory for loaded modules.
 168  *
 169  * Module data is presented in a self-describing format.  Each datum
 170  * is preceded by a 32-bit identifier and a 32-bit size field.
 171  *
 172  * Currently, the following data are saved:
 173  *
 174  * MOD_NAME     (variable)              module name (string)
 175  * MOD_TYPE     (variable)              module type (string)
 176  * MOD_ARGS     (variable)              module parameters (string)
 177  * MOD_ADDR     sizeof(vm_offset_t)     module load address
 178  * MOD_SIZE     sizeof(size_t)          module size
 179  * MOD_METADATA (variable)              type-specific metadata
 180  */
 181 #define COPY32(v, a, c) {                       \
 182     u_int32_t   x = (v);                        \
 183     if (c)                                      \
 184         archsw.arch_copyin(&x, a, sizeof(x));   \
 185     a += sizeof(x);                             \
 186 }
 187
 188 #define MOD_STR(t, a, s, c) {                   \
 189     COPY32(t, a, c);                            \
 190     COPY32(strlen(s) + 1, a, c)                 \
 191     if (c)                                      \
 192         archsw.arch_copyin(s, a, strlen(s) + 1);\
 193     a += roundup(strlen(s) + 1, sizeof(u_long));\
 194 }
 195
 196 #define MOD_NAME(a, s, c)       MOD_STR(MODINFO_NAME, a, s, c)
 197 #define MOD_TYPE(a, s, c)       MOD_STR(MODINFO_TYPE, a, s, c)
 198 #define MOD_ARGS(a, s, c)       MOD_STR(MODINFO_ARGS, a, s, c)
 199
 200 #define MOD_VAR(t, a, s, c) {                   \
 201     COPY32(t, a, c);                            \
 202     COPY32(sizeof(s), a, c);                    \
 203     if (c)                                      \
 204         archsw.arch_copyin(&s, a, sizeof(s));   \
 205     a += roundup(sizeof(s), sizeof(u_long));    \
 206 }
 207
 208 #define MOD_ADDR(a, s, c)       MOD_VAR(MODINFO_ADDR, a, s, c)
 209 #define MOD_SIZE(a, s, c)       MOD_VAR(MODINFO_SIZE, a, s, c)
 210
 211 #define MOD_METADATA(a, mm, c) {                \
 212     COPY32(MODINFO_METADATA | mm->md_type, a, c);\
 213     COPY32(mm->md_size, a, c);                  \
 214     if (c)                                      \
 215         archsw.arch_copyin(mm->md_data, a, mm->md_size);\
 216     a += roundup(mm->md_size, sizeof(u_long));  \
 217 }
 218
 219 #define MOD_END(a, c) {                         \
 220     COPY32(MODINFO_END, a, c);                  \
 221     COPY32(0, a, c);                            \
 222 }
 223
 224 vm_offset_t
 225 md_copymodules(vm_offset_t addr)
 226 {
 227     struct preloaded_file       *fp;
 228     struct file_metadata        *md;
 229     int                         c;
 230
 231     c = addr != 0;
 232     /* start with the first module on the list, should be the kernel */
 233     for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
 234
 235         MOD_NAME(addr, fp->f_name, c);  /* this field must come first */
 236         MOD_TYPE(addr, fp->f_type, c);
 237         if (fp->f_args)
 238             MOD_ARGS(addr, fp->f_args, c);
 239         MOD_ADDR(addr, fp->f_addr, c);
 240         MOD_SIZE(addr, fp->f_size, c);
 241         for (md = fp->f_metadata; md != NULL; md = md->md_next) {
 242             if (!(md->md_type & MODINFOMD_NOCOPY)) {
 243                 MOD_METADATA(addr, md, c);
 244             }
 245         }
 246     }
 247     MOD_END(addr, c);
 248     return(addr);
 249 }
 250
 251 /*
 252  * Load the information expected by a sparc64 kernel.
 253  *
 254  * - The 'boothowto' argument is constructed
 255  * - The 'bootdev' argument is constructed
 256  * - The kernel environment is copied into kernel space.
 257  * - Module metadata are formatted and placed in kernel space.
 258  */
 259 int
 260 md_load(char *args, vm_offset_t *modulep)
 261 {
 262     struct preloaded_file       *kfp;
 263     struct preloaded_file       *xp;
 264     struct file_metadata        *md;
 265     vm_offset_t                 kernend;
 266     vm_offset_t                 addr;
 267     vm_offset_t                 envp;
 268     vm_offset_t                 size;
 269     char                        *rootdevname;
 270     int                         howto;
 271
 272     howto = md_getboothowto(args);
 273
 274     /*
 275      * Allow the environment variable 'rootdev' to override the supplied device
 276      * This should perhaps go to MI code and/or have $rootdev tested/set by
 277      * MI code before launching the kernel.
 278      */
 279     if ((rootdevname = getenv("rootdev")) == NULL)
 280             rootdevname = getenv("currdev");
 281     getrootmount(rootdevname);
 282
 283     /* find the last module in the chain */
 284     addr = 0;
 285     for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
 286         if (addr < (xp->f_addr + xp->f_size))
 287             addr = xp->f_addr + xp->f_size;
 288     }
 289     /* pad to a page boundary */
 290     addr = roundup(addr, PAGE_SIZE);
 291
 292     /* copy our environment */
 293     envp = addr;
 294     addr = md_copyenv(addr);
 295
 296     /* pad to a page boundary */
 297     addr = roundup(addr, PAGE_SIZE);
 298
 299     kernend = 0;
 300     kfp = file_findfile(NULL, "elf64 kernel");
 301     if (kfp == NULL)
 302         kfp = file_findfile(NULL, "elf kernel");
 303     if (kfp == NULL)
 304         panic("can't find kernel file");
 305     file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
 306     file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
 307     file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
 308     file_addmetadata(kfp, MODINFOMD_DTLB_SLOTS, sizeof dtlb_slot, &dtlb_slot);
 309     file_addmetadata(kfp, MODINFOMD_ITLB_SLOTS, sizeof itlb_slot, &itlb_slot);
 310     file_addmetadata(kfp, MODINFOMD_DTLB,
 311         dtlb_slot * sizeof(*dtlb_store), dtlb_store);
 312     file_addmetadata(kfp, MODINFOMD_ITLB,
 313         itlb_slot * sizeof(*itlb_store), itlb_store);
 314
 315     *modulep = addr;
 316     size = md_copymodules(0);
 317     kernend = roundup(addr + size, PAGE_SIZE);
 318
 319     md = file_findmetadata(kfp, MODINFOMD_KERNEND);
 320     bcopy(&kernend, md->md_data, sizeof kernend);
 321
 322     (void)md_copymodules(addr);
 323
 324     return(0);
 325 }