/* * $Id$ * From $NetBSD: bootxx.c,v 1.4 1997/09/06 14:08:29 drochner Exp $ */ /* * Copyright (c) 1995 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include #include #define DEBUGxx extern end[]; int errno; char *heap = (char*) end; void putchar(int c) { if (c == '\n') prom_putchar('\r'); prom_putchar(c); } void puts(const char *s) { while (*s) putchar(*s++); } void * malloc(size_t size) { char *p = heap; size = (size + 7) & ~7; heap += size; return p; } void free(void * p) { } void panic(const char *message, ...) { puts(message); puts("\r\n"); halt(); } int prom_fd = 0; int devopen() { prom_return_t ret; char devname[64]; if (prom_fd) return; ret.bits = prom_getenv(PROM_E_BOOTED_DEV, devname, sizeof devname); ret.bits = prom_open(devname, ret.u.retval + 1); if (ret.u.status) panic("devopen: open failed\n"); prom_fd = ret.u.retval; /* XXX read disklabel and setup partition offset */ return 0; } #ifdef DEBUG void puthex(u_long v) { int digit; char hex[] = "0123456789abcdef"; if (!v) { puts("0"); return; } for (digit = 0; v >= (0x10L << digit); digit += 4) ; for (; digit >= 0; digit -= 4) putchar(hex[(v >> digit) & 0xf]); } #endif void devread(char *buf, int block, size_t size) { #ifdef DEBUG puts("devread("); puthex((u_long)buf); puts(","); puthex(block); puts(","); puthex(size); puts(")\n"); #endif prom_read(prom_fd, size, buf, block); } void devclose() { if (prom_fd) { prom_close(prom_fd); prom_fd = 0; } } void loadfile(char *name, char *addr) { int n; if (openrd(name)) { puts("Can't open file "); puts(name); puts("\n"); halt(); } do { n = read(addr, 1024); addr += n; twiddle(); } while (n > 0); devclose(); } void main() { char *loadaddr = (char*) SECONDARY_LOAD_ADDRESS; char *p; void (*entry) __P((void)); int i; init_prom_calls(); loadfile("/boot/boot2", loadaddr); entry = (void (*)())loadaddr; (*entry)(); }