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Annotation of src/sys/arch/i386/stand/lib/exec.c, Revision 1.16

1.16    ! jdolecek    1: /*     $NetBSD: exec.c,v 1.15 2000/02/22 07:45:04 dbj Exp $     */
1.1       perry       2:
                      3: /*
                      4:  * Copyright (c) 1982, 1986, 1990, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  * Copyright (c) 1996
                      7:  *     Matthias Drochner.  All rights reserved.
                      8:  * Copyright (c) 1996
                      9:  *     Perry E. Metzger.  All rights reserved.
1.8       christos   10:  * Copyright (c) 1997
                     11:  *     Martin Husemann.  All rights reserved.
1.1       perry      12:  *
                     13:  * Redistribution and use in source and binary forms, with or without
                     14:  * modification, are permitted provided that the following conditions
                     15:  * are met:
                     16:  * 1. Redistributions of source code must retain the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer.
                     18:  * 2. Redistributions in binary form must reproduce the above copyright
                     19:  *    notice, this list of conditions and the following disclaimer in the
                     20:  *    documentation and/or other materials provided with the distribution.
                     21:  * 3. All advertising materials mentioning features or use of this software
                     22:  *    must display the following acknowledgement:
                     23:  *     This product includes software developed by the University of
                     24:  *     California, Berkeley and its contributors.
                     25:  * 4. Neither the name of the University nor the names of its contributors
                     26:  *    may be used to endorse or promote products derived from this software
                     27:  *    without specific prior written permission.
                     28:  *
                     29:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     30:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     31:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     32:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     33:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     34:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     35:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     36:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     37:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     38:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     39:  * SUCH DAMAGE.
                     40:  *
                     41:  *     @(#)boot.c      8.1 (Berkeley) 6/10/93
                     42:  */
                     43:
1.2       thorpej    44: /*
1.8       christos   45:  * starts NetBSD a.out kernel
                     46:  * needs lowlevel startup from startprog.S
                     47:  * This is a special version of exec.c to support use of XMS.
1.1       perry      48:  */
1.8       christos   49:
1.1       perry      50: #include <sys/param.h>
                     51: #include <sys/reboot.h>
                     52: #ifdef COMPAT_OLDBOOT
                     53: #include <sys/disklabel.h>
                     54: #endif
                     55:
                     56: #include <lib/libsa/stand.h>
1.4       drochner   57:
1.6       christos   58: #include "loadfile.h"
1.1       perry      59: #include "libi386.h"
1.4       drochner   60: #include "bootinfo.h"
1.16    ! jdolecek   61: #ifdef SUPPORT_PS2
        !            62: #include "biosmca.h"
        !            63: #endif
1.1       perry      64:
                     65: #ifdef COMPAT_OLDBOOT
1.11      drochner   66: static int dev2major __P((char *, int *));
                     67:
1.1       perry      68: static int
                     69: dev2major(devname, major)
1.2       thorpej    70:        char           *devname;
                     71:        int            *major;
1.1       perry      72: {
1.16    ! jdolecek   73:        static const struct {
        !            74:                const char *name;
        !            75:                int maj;
        !            76:        } devices[] = {
        !            77:                { "wd", 0  },
        !            78:                { "fd", 2  },
        !            79:                { "sd", 4  },
        !            80: #ifdef SUPPORT_PS2
        !            81:                { "ed", 20 },
        !            82: #endif
        !            83:        };
        !            84: #define NUMDEVICES (sizeof(devices)/sizeof(devices[0]))
1.2       thorpej    85:        int             i;
1.1       perry      86:
1.2       thorpej    87:        for (i = 0; i < NUMDEVICES; i++)
1.16    ! jdolecek   88:                if (!strcmp(devname, devices[i].name)) {
        !            89:                        *major = devices[i].maj;
1.2       thorpej    90:                        return (0);
                     91:                }
                     92:        return (-1);
1.1       perry      93: }
                     94: #endif
1.6       christos   95: #define BOOT_NARGS     6
1.1       perry      96:
1.4       drochner   97: extern struct btinfo_console btinfo_console;
                     98:
1.2       thorpej    99: int
1.4       drochner  100: exec_netbsd(file, loadaddr, boothowto)
1.2       thorpej   101:        const char     *file;
                    102:        physaddr_t      loadaddr;
                    103:        int             boothowto;
1.1       perry     104: {
1.6       christos  105:        u_long          boot_argv[BOOT_NARGS];
                    106:        int             fd;
1.8       christos  107:        u_long          marks[MARK_MAX];
                    108:        struct btinfo_symtab btinfo_symtab;
                    109:        u_long          extmem;
1.15      dbj       110:        u_long          basemem;
1.8       christos  111: #ifdef XMS
                    112:        u_long          xmsmem;
                    113:        physaddr_t      origaddr = loadaddr;
                    114: #endif
                    115:
1.1       perry     116: #ifdef COMPAT_OLDBOOT
1.2       thorpej   117:        char           *fsname, *devname;
                    118:        int             unit, part;
                    119:        const char     *filename;
                    120:        int             bootdevnr;
1.1       perry     121: #endif
                    122:
                    123: #ifdef DEBUG
1.13      drochner  124:        printf("exec: file=%s loadaddr=0x%lx\n",
                    125:               file ? file : "NULL", loadaddr);
1.1       perry     126: #endif
1.4       drochner  127:
1.6       christos  128:        BI_ALLOC(6); /* ??? */
1.4       drochner  129:
                    130:        BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console));
                    131:
1.8       christos  132:        extmem = getextmem();
1.15      dbj       133:        basemem = getbasemem();
1.8       christos  134:
                    135: #ifdef XMS
                    136:        if ((getextmem1() == 0) && (xmsmem = checkxms())) {
                    137:                u_long kernsize;
                    138:
                    139:                /*
                    140:                 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because
                    141:                 *  getextmem() is getextmem1(). Without, the "smart"
                    142:                 *  methods could fail to report all memory as well.
                    143:                 * xmsmem is a few kB less than the actual size, but
                    144:                 *  better than nothing.
                    145:                 */
                    146:                if (xmsmem > extmem)
                    147:                        extmem = xmsmem;
                    148:                /*
                    149:                 * Get the size of the kernel
                    150:                 */
                    151:                marks[MARK_START] = loadaddr;
1.12      christos  152:                if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1)
1.8       christos  153:                        goto out;
                    154:                close(fd);
                    155:
                    156:                kernsize = marks[MARK_END];
                    157:                kernsize = (kernsize + 1023) / 1024;
                    158:
                    159:                loadaddr = xmsalloc(kernsize);
                    160:                if (!loadaddr)
                    161:                        return(ENOMEM);
                    162:        }
                    163: #endif
1.7       christos  164:        marks[MARK_START] = loadaddr;
1.12      christos  165:        if ((fd = loadfile(file, marks, LOAD_KERNEL)) == -1)
1.4       drochner  166:                goto out;
1.1       perry     167:
                    168:        boot_argv[0] = boothowto;
                    169:
                    170: #ifdef COMPAT_OLDBOOT
                    171:        /* prepare boot device information for kernel */
1.2       thorpej   172:        if (parsebootfile(file, &fsname, &devname, &unit, &part, &filename)
                    173:            || strcmp(fsname, "ufs"))
                    174:                bootdevnr = 0;  /* XXX error out if parse error??? */
1.1       perry     175:        else {
1.2       thorpej   176:                int             major;
1.1       perry     177:
1.3       thorpej   178:                if (strcmp(devname, "hd") == 0) {
1.2       thorpej   179:                        /* generic BIOS disk, have to guess type */
1.6       christos  180:                        struct open_file *f = &files[fd];       /* XXX */
1.2       thorpej   181:
1.16    ! jdolecek  182:                        switch (biosdisk_gettype(f)) {
        !           183:                        case DTYPE_SCSI:
1.2       thorpej   184:                                devname = "sd";
1.16    ! jdolecek  185:                                break;
        !           186: #ifdef SUPPORT_PS2
        !           187:                        case DTYPE_ESDI:
        !           188:                                if (biosmca_ps2model) {
        !           189:                                        devname = "ed";
        !           190:                                        break;
        !           191:                                }
        !           192: #endif
        !           193:                        default:
1.2       thorpej   194:                                devname = "wd";
1.16    ! jdolecek  195:                                break;
        !           196:                        }
1.3       thorpej   197:
                    198:                        /*
                    199:                         * The old boot block performed the following
                    200:                         * conversion:
                    201:                         *
                    202:                         *      hdN -> Xd0
                    203:                         *
                    204:                         * where X is the type specified by the label.
                    205:                         * We mimmick that here, for lack of any better
                    206:                         * way of doing things.
                    207:                         */
                    208:                        unit = 0;
1.2       thorpej   209:                }
1.3       thorpej   210:
1.2       thorpej   211:                if (dev2major(devname, &major))
                    212:                        bootdevnr = 0;  /* XXX error out??? */
1.1       perry     213:                else
1.2       thorpej   214:                        bootdevnr = MAKEBOOTDEV(major, 0, 0, unit, part);
1.1       perry     215:        }
                    216:
                    217:        boot_argv[1] = bootdevnr;
1.5       drochner  218: #else
                    219:        boot_argv[1] = 0;
                    220: #endif
1.8       christos  221:        boot_argv[2] = vtophys(bootinfo);       /* old cyl offset */
                    222:        /* argv[3] below */
                    223:        boot_argv[4] = extmem;
1.15      dbj       224:        boot_argv[5] = basemem;
1.8       christos  225:
                    226:        close(fd);
1.10      drochner  227:
                    228:        /*
                    229:         * Gather some information for the kernel. Do this after the
                    230:         * "point of no return" to avoid memory leaks.
                    231:         * (but before DOS might be trashed in the XMS case)
                    232:         */
                    233: #ifdef PASS_BIOSGEOM
                    234:        bi_getbiosgeom();
                    235: #endif
                    236: #ifdef PASS_MEMMAP
                    237:        bi_getmemmap();
                    238: #endif
1.8       christos  239:
                    240: #ifdef XMS
                    241:        if (loadaddr != origaddr) {
                    242:                /*
1.14      ross      243:                 * We now have done our last DOS IO, so we may
1.8       christos  244:                 * trash the OS. Copy the data from the temporary
                    245:                 * buffer to its real adress.
                    246:                 */
                    247:                marks[MARK_START] -= loadaddr;
                    248:                marks[MARK_END] -= loadaddr;
                    249:                marks[MARK_SYM] -= loadaddr;
                    250:                marks[MARK_END] -= loadaddr;
                    251:                ppbcopy(loadaddr, origaddr, marks[MARK_END]);
                    252:        }
                    253: #endif
                    254:        marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) &
                    255:            (-sizeof(int));
                    256:
1.7       christos  257:        boot_argv[3] = marks[MARK_END];
1.1       perry     258:
                    259:
                    260: #ifdef DEBUG
1.8       christos  261:        printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY],
1.7       christos  262:            marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]);
1.1       perry     263: #endif
                    264:
1.8       christos  265:        btinfo_symtab.nsym = marks[MARK_NSYM];
                    266:        btinfo_symtab.ssym = marks[MARK_SYM];
                    267:        btinfo_symtab.esym = marks[MARK_END];
                    268:        BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab));
                    269:
1.15      dbj       270:        startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv,
                    271:                i386_trunc_page(basemem*1024));
1.1       perry     272:        panic("exec returned");
                    273:
1.4       drochner  274: out:
                    275:        BI_FREE();
                    276:        bootinfo = 0;
1.2       thorpej   277:        return (-1);
1.1       perry     278: }

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