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Annotation of sys/arch/sparc/stand/bootxx/bootxx.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: bootxx.c,v 1.5 2003/11/14 19:05:36 miod Exp $ */
                      2: /*     $NetBSD: bootxx.c,v 1.2 1997/09/14 19:28:17 pk Exp $    */
                      3:
                      4: /*
                      5:  * Copyright (c) 1994 Paul Kranenburg
                      6:  * All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. All advertising materials mentioning features or use of this software
                     17:  *    must display the following acknowledgement:
                     18:  *      This product includes software developed by Paul Kranenburg.
                     19:  * 4. The name of the author may not be used to endorse or promote products
                     20:  *    derived from this software without specific prior written permission
                     21:  *
                     22:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     23:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     24:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     25:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     26:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     27:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     28:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     29:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     30:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     31:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     32:  */
                     33:
                     34: #include <sys/param.h>
                     35: #include <sys/time.h>
                     36: #include <a.out.h>
                     37:
                     38: #include <lib/libsa/stand.h>
                     39:
                     40: #include <sparc/stand/common/promdev.h>
                     41:
                     42: int debug;
                     43: int netif_debug;
                     44:
                     45: /*
                     46:  * Boot device is derived from ROM provided information.
                     47:  */
                     48: char           progname[] = "bootxx";
                     49: struct open_file       io;
                     50:
                     51: /*
                     52:  * The contents of the block_* variables below is set by installboot(8)
                     53:  * to hold the filesystem data of the second-stage boot program
                     54:  * (typically `/boot'): filesystem block size, # of filesystem blocks and
                     55:  * the block numbers themselves.
                     56:  */
                     57: #define MAXBLOCKNUM    256     /* enough for a 2MB boot program (bs 8K) */
                     58: int32_t                        block_size = 0;
                     59: int32_t                        block_count = MAXBLOCKNUM;
                     60: daddr_t                        block_table[MAXBLOCKNUM] = { 0 };
                     61:
                     62:
                     63: void   loadboot(struct open_file *, caddr_t);
                     64:
                     65: int
                     66: main(int argc, char *argv[])
                     67: {
                     68:        char    *dummy;
                     69:        size_t  n;
                     70:        register void (*entry)(caddr_t) = (void (*)(caddr_t))LOADADDR;
                     71:
                     72:        prom_init();
                     73:        io.f_flags = F_RAW;
                     74:        if (devopen(&io, 0, &dummy)) {
                     75:                panic("%s: can't open device", progname);
                     76:        }
                     77:
                     78:        (void)loadboot(&io, LOADADDR);
                     79:        (io.f_dev->dv_close)(&io);
                     80:        (*entry)(cputyp == CPU_SUN4 ? LOADADDR : (caddr_t)promvec);
                     81:        _rtt();
                     82: }
                     83:
                     84: void
                     85: loadboot(f, addr)
                     86:        register struct open_file       *f;
                     87:        register char                   *addr;
                     88: {
                     89:        register int    i;
                     90:        register char   *buf;
                     91:        size_t          n;
                     92:        daddr_t         blk;
                     93:
                     94:        /*
                     95:         * Allocate a buffer that we can map into DVMA space; only
                     96:         * needed for sun4 architecture, but use it for all machines
                     97:         * to keep code size down as much as possible.
                     98:         */
                     99:        buf = alloc(block_size);
                    100:        if (buf == NULL)
                    101:                panic("%s: alloc failed", progname);
                    102:
                    103:        for (i = 0; i < block_count; i++) {
                    104:                if ((blk = block_table[i]) == 0)
                    105:                        panic("%s: block table corrupt", progname);
                    106:
                    107: #ifdef DEBUG
                    108:                printf("%s: block # %d = %d\n", progname, i, blk);
                    109: #endif
                    110:                if ((f->f_dev->dv_strategy)(f->f_devdata, F_READ,
                    111:                                            blk, block_size, buf, &n)) {
                    112:                        panic("%s: read failure", progname);
                    113:                }
                    114:                bcopy(buf, addr, block_size);
                    115:                if (n != block_size)
                    116:                        panic("%s: short read", progname);
                    117:                if (i == 0) {
                    118:                        register int m = N_GETMAGIC(*(struct exec *)addr);
                    119:                        if (m == ZMAGIC || m == NMAGIC || m == OMAGIC) {
                    120:                                /* Move exec header out of the way */
                    121:                                bcopy(addr, addr - sizeof(struct exec), n);
                    122:                                addr -= sizeof(struct exec);
                    123:                        }
                    124:                }
                    125:                addr += n;
                    126:        }
                    127:
                    128: }