void
main(void *ofw)
{
int boothowto, i = 0, isfloppy, kboothowto;
char kernel[PROM_MAX_PATH];
char bootline[PROM_MAX_PATH];
/* Initialize OpenFirmware */
romp = ofw;
prom_init();
printf("\r>> %s, Revision %s\n", bootprog_name, bootprog_rev);
/* Figure boot arguments */
strncpy(bootdev, prom_getbootpath(), sizeof(bootdev) - 1);
kboothowto = boothowto =
bootoptions(prom_getbootargs(), bootdev, kernel, bootline);
isfloppy = bootdev_isfloppy(bootdev);
for (;; *kernel = '\0') {
if (boothowto & RB_ASKNAME) {
char cmdline[PROM_MAX_PATH];
printf("Boot: ");
kgets(cmdline, sizeof(cmdline));
if (!strcmp(cmdline,"exit") ||
!strcmp(cmdline,"halt")) {
prom_halt();
} else if (!strcmp(cmdline, "?") ||
!strcmp(cmdline, "help")) {
help();
continue;
}
boothowto = bootoptions(cmdline, bootdev, kernel,
bootline);
boothowto |= RB_ASKNAME;
i = 0;
}
if (*kernel == '\0') {
if (kernelnames[i] == NULL) {
boothowto |= RB_ASKNAME;
continue;
}
strncpy(kernel, kernelnames[i++], PROM_MAX_PATH);
} else if (i == 0) {
/*
* Kernel name was passed via command line -- ask user
* again if requested image fails to boot.
*/
boothowto |= RB_ASKNAME;
}
check_boot_config();
start_kernel(kernel, bootline, ofw, isfloppy, kboothowto);
/*
* Try next name from kernel name list if not in askname mode,
* enter askname on reaching list's end.
*/
if ((boothowto & RB_ASKNAME) == 0 && (kernelnames[i] != NULL)) {
printf(": trying %s...\n", kernelnames[i]);
} else {
printf("\n");
boothowto |= RB_ASKNAME;
}
}
(void)printf("Boot failed! Exiting to the Firmware.\n");
prom_halt();
}
static int
loadk(char *kernel, u_long *marks)
{
int fd, error;
vaddr_t va;
paddr_t pa;
u_long size;
int flags = LOAD_KERNEL;
if ((fd = open(kernel, 0)) < 0)
return (errno ? errno : ENOENT);
marks[MARK_START] = 0;
if ((error = fdloadfile(fd, marks, COUNT_KERNEL)) != 0)
goto out;
size = marks[MARK_END] - marks[MARK_START];
/* We want that leading 16K in front of the kernel image */
size += PROM_LOADADDR;
va = marks[MARK_START] - PROM_LOADADDR;
/*
* Extra space for bootinfo and kernel bootstrap.
* In compat mode, we get to re-use the space occupied by the
* boot program. Traditionally, we've silently assumed that
* is enough for the kernel to work with.
*/
size += BOOTINFO_SIZE;
if (!compatmode)
size += 512 * 1024;
/* Get a physical load address */
pa = getphysmem(size);
if (pa == (paddr_t)-1) {
error = EFBIG;
goto out;
}
if (boothowto & AB_VERBOSE)
printf("Loading at physical address %lx\n", pa);
if (pmap_map(va, pa, size) != 0) {
error = EFAULT;
goto out;
}
/* XXX - to do: inspect kernel image and set compat mode */
if (compatmode) {
/* Double-map at VA 0 for compatibility */
if (pa + size >= bstart) {
printf("%s: too large for compat mode\n", kernel);
error = EFBIG;
goto out;
}
if (pa != 0 && pmap_map(0, pa, size) != 0) {
error = EFAULT;
goto out;
}
loadaddrmask = 0x07ffffffUL;
}
if (bootdev_isfloppy(prom_bootdevice))
flags &= ~LOAD_BACKWARDS;
marks[MARK_START] = 0;
error = fdloadfile(fd, marks, flags);
out:
close(fd);
return (error);
}