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