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Annotation of sys/arch/i386/stand/boot/crt0.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: crt0.c,v 1.5 2003/06/03 20:22:11 mickey Exp $ */
                      2:
                      3: /*
                      4:  * Copyright (c) 1997-1998 Michael Shalayeff
                      5:  * All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     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
                     18:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     19:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     20:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     21:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     22:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     24:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     25:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     26:  * SUCH DAMAGE.
                     27:  *
                     28:  */
                     29:
                     30:
                     31: #include <sys/param.h>
                     32: #include <sys/types.h>
                     33: #include <sys/mman.h>
                     34: #include <sys/syscall.h>
                     35: #include <termios.h>
                     36: #include "libsa.h"
                     37: #include <lib/libsa/unixdev.h>
                     38:
                     39: void start(void) asm("start");
                     40: void _rtt(void);
                     41: extern int  boot(dev_t);
                     42: static void domap(void);
                     43: static void seterm(void);
                     44:
                     45: void
                     46: start()
                     47: {
                     48:        domap();
                     49:        seterm();
                     50:        uexit(boot(0));
                     51: }
                     52:
                     53: void
                     54: _rtt()
                     55: {
                     56:        uexit(1);
                     57: }
                     58:
                     59: #define ummap(a,l,p,f,fd,o) (caddr_t)syscall((quad_t)SYS_mmap,a,l,p,f,fd,0,o)
                     60:
                     61: static void
                     62: domap()
                     63: {
                     64:        extern char end[];
                     65:        register caddr_t p = (caddr_t)(((u_long)end + PGOFSET) & ~PGOFSET);
                     66:
                     67:        /* map heap */
                     68:        if ( (p = ummap(p, 32*NBPG, PROT_READ|PROT_WRITE,
                     69:                   MAP_FIXED|MAP_ANON, -1, 0)) == (caddr_t)-1) {
                     70:                printf("mmap failed: %d\n", errno);
                     71:                uexit(1);
                     72:        }
                     73: #ifdef DEBUG
                     74:        else
                     75:                printf("mmap==%p\n", p);
                     76: #endif
                     77:
                     78:        /* map kernel */
                     79:        if ( (p = ummap(0x100000, 0xf00000, PROT_READ|PROT_WRITE,
                     80:                   MAP_FIXED|MAP_ANON, -1, 0)) == (caddr_t)-1) {
                     81:                printf("mmap failed: %d\n", errno);
                     82:                uexit(1);
                     83:        }
                     84: #ifdef DEBUG
                     85:        else
                     86:                printf("mmap==%p\n", p);
                     87: #endif
                     88:
                     89: }
                     90:
                     91: void
                     92: seterm()
                     93: {
                     94:        struct termios tc;
                     95:
                     96:        if (uioctl(0, TIOCGETA, (char *)&tc) < 0) {
                     97:                printf("cannot get tty\n");
                     98:                uexit(1);
                     99:        }
                    100:
                    101:         tc.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
                    102:         tc.c_oflag &= ~OPOST;
                    103:         tc.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
                    104:         tc.c_cflag &= ~(CSIZE|PARENB);
                    105:         tc.c_cflag |= CS8;
                    106:
                    107:        if (uioctl(0, TIOCSETA, (char *)&tc) < 0) {
                    108:                printf("cannot set tty\n");
                    109:                uexit(1);
                    110:        }
                    111: }