コード例 #1
0
ファイル: boot.c プロジェクト: ryo/netbsd-src
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();
}
コード例 #2
0
ファイル: boot.c プロジェクト: yazshel/netbsd-kernel
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);
}