1 files changed, 282 insertions, 0 deletions
diff --git a/util/romtool/util.c b/util/romtool/util.c
new file mode 100644
index 0000000000..03479c5095
--- /dev/null
+++ b/util/romtool/util.c
@@ -0,0 +1,282 @@
+/*
+ * romtool
+ *
+ * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include "romtool.h"
+
+int get_size(const char *size)
+{
+	char *next;
+	int val = strtoul(size, &next, 0);
+
+	/* Support modifiers for the size kK and mM for kbytes and 
+	   mbytes respectfully */
+
+	if (next != NULL) {
+		if (*next == 'k' || *next == 'K')
+			val *= 1024;
+		else if (*next == 'm' || *next == 'M')
+			val *= (1024 * 1024);
+	}
+
+	return val;
+}
+
+int copy_from_fd(int fd, void *ptr, int size)
+{
+	unsigned char *p = ptr;
+
+	while (size > 0) {
+		int ret = read(fd, p, size);
+
+		if (ret == -1) {
+			ERROR("Error while reading: %m\n");
+			return -1;
+		}
+
+		if (ret == 0) {
+			ERROR("Unexpected end of file\n");
+			return -1;
+		}
+
+		p += ret;
+		size -= ret;
+	}
+
+	return 0;
+}
+
+int size_and_open(const char *filename, unsigned int *size)
+{
+	struct stat s;
+
+	int fd = open(filename, O_RDONLY);
+
+	if (fd == -1) {
+		ERROR("Unable to open %s: %m\n", filename);
+		return -1;
+	}
+
+	if (fstat(fd, &s)) {
+		ERROR("Unable to stat %s: %m\n", filename);
+		close(fd);
+		return -1;
+	}
+
+	*size = s.st_size;
+	return fd;
+}
+
+int map_rom(struct rom *rom, int size)
+{
+	rom->ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
+			rom->fd, 0);
+
+	if (rom->ptr == MAP_FAILED) {
+		ERROR("Could not map the rom: %m\n");
+		rom->ptr = NULL;
+		return -1;
+	}
+
+	return 0;
+}
+
+int open_rom(struct rom *rom, const char *filename)
+{
+	struct stat s;
+	unsigned long offset;
+
+	if (stat(filename, &s)) {
+		ERROR("Could not stat %s: %m\n", filename);
+		return -1;
+	}
+
+	rom->fd = open(filename, O_RDWR);
+
+	if (rom->fd == -1) {
+		ERROR("Could not open %s: %m\n", filename);
+		rom->fd = 0;
+		return -1;
+	}
+
+	if (map_rom(rom, s.st_size))
+		goto err;
+
+	/* Find the master header */
+
+	offset = ROM_READL(rom, s.st_size - 4);
+
+	rom->header = (struct romfs_header *)
+	    ROM_PTR(rom, s.st_size - (0xFFFFFFFF - offset) - 1);
+
+	if (ntohl(rom->header->magic) != HEADER_MAGIC) {
+		ERROR("This does not appear to be a valid ROM\n");
+		goto err;
+	}
+
+	/* Check that the alignment is correct */
+	if (ntohl(rom->header->align) == 0) {
+		ERROR("The alignment in the ROM is 0 - probably malformed\n");
+		goto err;
+	}
+
+	/* Sanity check that the size matches the file size */
+
+	if (ntohl(rom->header->romsize) != s.st_size) {
+		ERROR("The ROM size in the header does not match the file\n");
+		ERROR("ROM size is %d bytes, file size is %d bytes\n",
+		      ntohl(rom->header->romsize), (unsigned int)s.st_size);
+		goto err;
+	}
+
+	rom->size = ntohl(rom->header->romsize);
+	rom->fssize = rom->size - ntohl(rom->header->bootblocksize);
+
+	return 0;
+
+err:
+	if (rom->ptr != NULL)
+		munmap(rom->ptr, s.st_size);
+
+	if (rom->fd > 0)
+		close(rom->fd);
+
+	rom->ptr = NULL;
+	rom->fd = 0;
+	return -1;
+}
+
+int create_rom(struct rom *rom, const unsigned char *filename,
+	       int romsize, int bootblocksize, int align)
+{
+	unsigned char null = '\0';
+
+	if (rom->fd != 0) {
+		ERROR("%s already exists - cannot create\n", filename);
+		return -1;
+	}
+
+	/* Remember the size of the entire ROM */
+	rom->size = romsize;
+
+	/* The size of the archive section is everything but the bootblock */
+	rom->fssize = romsize - bootblocksize;
+
+	/* Open the file descriptor */
+
+	rom->fd = open((char *)filename, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
+
+	if (rom->fd == -1) {
+		ERROR("Could not create %s: %m\n", filename);
+		return -1;
+	}
+
+	/* Size the new file appropriately */
+	lseek(rom->fd, romsize - 1, SEEK_SET);
+	write(rom->fd, &null, 1);
+
+	if (map_rom(rom, romsize)) {
+		close(rom->fd);
+		return -1;
+	}
+
+	/* Clear the reset vector */
+	memset(rom->ptr + rom->size - 16, 0, 16);
+
+	ROM_WRITEL(rom, rom->size - 4,
+		   0xFFFFFFF0 - sizeof(struct romfs_header));
+
+	/* This is a pointer to the header for easy access */
+	rom->header = (struct romfs_header *)
+	    ROM_PTR(rom, rom->size - 16 - sizeof(struct romfs_header));
+
+	rom->header->magic = htonl(HEADER_MAGIC);
+	rom->header->romsize = htonl(romsize);
+	rom->header->bootblocksize = htonl(bootblocksize);
+	rom->header->align = htonl(align);
+	rom->header->offset = htonl(0);
+
+	return 0;
+}
+
+int add_bootblock(struct rom *rom, const char *filename)
+{
+	unsigned int size;
+	//unsigned int offset;
+	int fd = size_and_open(filename, &size);
+	int ret;
+	struct romfs_header tmp;
+
+	if (fd == -1)
+		return -1;
+
+	if (size > ntohl(rom->header->bootblocksize)) {
+		ERROR("The bootblock size is not correct (%d vs %d)\n",
+		      size, ntohl(rom->header->bootblocksize));
+		return -1;
+	}
+
+	/* Copy the current header into a temporary buffer */
+	memcpy(&tmp, rom->header, sizeof(struct romfs_header));
+
+	/* Copy the bootblock into place at the end of the file */
+
+	ret = copy_from_fd(fd, ROM_PTR(rom, rom->size - ntohl(rom->header->bootblocksize)), size);
+
+	close(fd);
+
+	if (ret) {
+		ERROR("Unable to add %s to the bootblock\n", filename);
+		return -1;
+	}
+
+	/* FIXME: This should point to a location defined by coreboot */
+
+	ROM_WRITEL(rom, rom->size - 4,
+		   0xFFFFFFF0 - sizeof(struct romfs_header));
+
+	/* This is a pointer to the header for easy access */
+	rom->header = (struct romfs_header *)
+	    ROM_PTR(rom, rom->size - 16 - sizeof(struct romfs_header));
+
+#if 0
+	/* Figure out the new location for the header */
+	offset = ROM_READL(rom, rom->size - 4);
+
+	rom->header = (struct romfs_header *)
+	    ROM_PTR(rom, offset - (0xFFFFFFFF - rom->size));
+#endif
+
+	/* Replace the LAR header */
+	memcpy(rom->header, &tmp, sizeof(struct romfs_header));
+
+	return 0;
+}
+
+int rom_exists(struct rom *rom)
+{
+	if (rom->fd <= 0)
+		return 0;
+	return 1;
+}