imgtec/danube: Build BIMG boot images

Add a new utility named bimgtool, a simple tool which generates boot
images in the BIMG format. This is the format the Danube boot ROM
expects the user supplied code to be wrapped in, it is described by
struct bimg_header in the code.

This utility will be used to wrap the coreboot bootblock when building
Danube targets.

BUG=chrome-os-partner:31438
TEST=none yet

Change-Id: I08ddb1b70d0b1feb1ffb3d62c4e5e6f07f4acdb7
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 7fe6a9f383b79120f9ae231453d4b3a0f85b4fa7
Original-Change-Id: I63b9f5e09cd1f12765317b38e2a0dd033cdd6d39
Original-Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/207975
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8768
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

2 files changed, 239 insertions, 0 deletions

diff --git a/util/bimgtool/Makefile b/util/bimgtool/Makefile
new file mode 100644
index 0000000000..3bd0f07a7d
--- /dev/null
+++ b/util/bimgtool/Makefile
@@ -0,0 +1,17 @@
+obj ?= $(shell pwd)
+
+HOSTCC ?= gcc
+CFLAGS ?= -g
+CFLAGS += -D_7ZIP_ST
+CFLAGS += -Wall -Wundef -Wstrict-prototypes -Wmissing-prototypes
+CFLAGS += -Wwrite-strings -Wredundant-decls -Wno-trigraphs
+CFLAGS += -Wstrict-aliasing -Wshadow -Werror
+LDFLAGS += -g
+
+all: dep $(obj)/bimgtool
+
+clean:
+	rm -f $(obj)/bimgtool
+
+$(obj)/bimgtool: bimgtool.c
+	$(HOSTCC) $(CFLAGS) -o $@ $^
diff --git a/util/bimgtool/bimgtool.c b/util/bimgtool/bimgtool.c
new file mode 100644
index 0000000000..eed9248692
--- /dev/null
+++ b/util/bimgtool/bimgtool.c
@@ -0,0 +1,222 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Imagination Technologies Ltd.
+ *
+ * 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 <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+struct bimg_header {
+	uint32_t magic;
+	uint16_t ver_major;
+	uint16_t ver_minor;
+	uint32_t data_size;
+	uint32_t entry_addr;
+	uint32_t flags;
+	uint32_t data_crc;
+	uint32_t crc;
+} __attribute__((packed));
+
+struct bimg_data_header {
+	uint32_t size;
+	uint32_t dest_addr;
+	uint16_t crc;
+} __attribute__((packed));
+
+#define BIMG_MAGIC	/* y */	0xabbadaba /* doo! */
+
+#define BIMG_OP_MASK		(0xf << 0)
+#define BIMG_OP_EXEC_RETURN	(0x1 << 0)
+#define BIMG_OP_EXEC_NO_RETURN	(0x2 << 0)
+#define BIMG_DATA_CHECKSUM	(0x1 << 4)
+
+#define MAX_RECORD_BYTES	0x8000
+
+#define CRC_INIT		0xffff
+
+#define error(msg...) fprintf(stderr, "ERROR: " msg)
+
+#define error_ret(ret, msg...) {		\
+	error(msg);				\
+	return ret;				\
+}
+
+static uint16_t crc_x25(uint16_t crc, void *void_buf, size_t size)
+{
+	static const uint16_t crc_table[16] = {
+		0x0000, 0x1021, 0x2042, 0x3063,
+		0x4084, 0x50a5, 0x60c6, 0x70e7,
+		0x8108, 0x9129, 0xa14a, 0xb16b,
+		0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
+	};
+	uint8_t *buf, data;
+
+	for (buf = void_buf; size; size--) {
+		data = *buf++;
+		crc = (crc << 4) ^ crc_table[((crc >> 12) ^ (data >> 4)) & 0xf];
+		crc = (crc << 4) ^ crc_table[((crc >> 12) ^ (data >> 0)) & 0xf];
+	}
+
+	return crc;
+}
+
+static int write_binary(FILE *out, FILE *in, struct bimg_header *hdr)
+{
+	static uint8_t file_buf[MAX_RECORD_BYTES];
+	struct bimg_data_header data_hdr;
+	size_t n_written;
+
+	data_hdr.dest_addr = hdr->entry_addr;
+
+	while ((data_hdr.size = fread(file_buf, 1, sizeof(file_buf), in))) {
+		data_hdr.crc = crc_x25(CRC_INIT, &data_hdr,
+			sizeof(data_hdr) - sizeof(data_hdr.crc));
+
+		if (fwrite(&data_hdr, sizeof(data_hdr), 1, out) != 1)
+			error_ret(-EIO, "Failed to write data header: %d\n",
+				  errno);
+
+		n_written = fwrite(file_buf, 1, data_hdr.size, out);
+		if (n_written != data_hdr.size)
+			error_ret(-EIO, "Failed to write to output file: %d\n",
+				  errno);
+
+		data_hdr.dest_addr += n_written;
+		hdr->data_size += sizeof(data_hdr) + n_written;
+		hdr->data_crc = crc_x25(hdr->data_crc, file_buf, n_written);
+	}
+
+	if (ferror(in))
+		error_ret(-EIO, "Failed to read input file\n");
+
+	return 0;
+}
+
+static int write_final(FILE *out, struct bimg_header *hdr)
+{
+	struct bimg_data_header data_hdr = {
+		.size = 0,
+		.dest_addr = ~0,
+	};
+
+	data_hdr.crc = crc_x25(CRC_INIT, &data_hdr,
+		sizeof(data_hdr) - sizeof(data_hdr.crc));
+
+	if (fwrite(&data_hdr, sizeof(data_hdr), 1, out) != 1)
+		error_ret(-EIO, "Failed to write data header: %d\n", errno);
+
+	hdr->data_size += sizeof(data_hdr);
+
+	return 0;
+}
+
+static void usage(FILE *f)
+{
+	fprintf(f,
+		"Usage: bimgtool <input> <output> <base-address>\n"
+		"\n"
+		"bimgtool is a simple tool which generates boot images in the "
+		"BIMG format used in systems designed by Imagination "
+		"Technologies, for example the Danube SoC. This version of the "
+		"tool generates BIMG version 1.0 images.\n"
+		"\n"
+		"  input:          The binary file to be converted to a BIMG\n"
+		"  output:         The name of the output BIMG file\n"
+		"  base-address:   The address in memory at which you wish the "
+		"input binary to be loaded.\n");
+}
+
+int main(int argc, char *argv[])
+{
+	const char *in_filename, *out_filename;
+	FILE *in_file, *out_file;
+	int err;
+	struct bimg_header hdr = {
+		.magic = BIMG_MAGIC,
+		.ver_major = 1,
+		.ver_minor = 0,
+		.flags = BIMG_OP_EXEC_NO_RETURN | BIMG_DATA_CHECKSUM,
+		.data_crc = CRC_INIT,
+	};
+
+	if (argc != 4) {
+		usage(stderr);
+		goto out_err;
+	}
+
+	in_filename = argv[1];
+	out_filename = argv[2];
+	hdr.entry_addr = strtoul(argv[3], NULL, 16);
+
+	in_file = fopen(in_filename, "r");
+	if (!in_file) {
+		error("Failed to open input file '%s'\n", in_filename);
+		goto out_err;
+	}
+
+	out_file = fopen(out_filename, "w");
+	if (!out_file) {
+		error("Failed to open output file '%s'\n", out_filename);
+		goto out_err_close_in;
+	}
+
+	if (fseek(out_file, sizeof(hdr), SEEK_SET)) {
+		error("Failed to seek past header: %d\n", errno);
+		goto out_err_close_out;
+	}
+
+	err = write_binary(out_file, in_file, &hdr);
+	if (err) {
+		error("Failed to write binary: %d\n", err);
+		goto out_err_close_out;
+	}
+
+	err = write_final(out_file, &hdr);
+	if (err) {
+		error("Failed to write final record: %d\n", err);
+		goto out_err_close_out;
+	}
+
+	hdr.crc = crc_x25(CRC_INIT, &hdr, sizeof(hdr) - sizeof(hdr.crc));
+
+	if (fseek(out_file, 0, SEEK_SET)) {
+		error("Failed to seek to header: %d\n", errno);
+		goto out_err_close_out;
+	}
+
+	if (fwrite(&hdr, sizeof(hdr), 1, out_file) != 1) {
+		error("Failed to write header: %d\n", errno);
+		goto out_err_close_out;
+	}
+
+	fclose(in_file);
+	fclose(out_file);
+	return EXIT_SUCCESS;
+
+out_err_close_out:
+	fclose(out_file);
+out_err_close_in:
+	fclose(in_file);
+out_err:
+	return EXIT_FAILURE;
+}