powerpc/CoreNet: add tool to support pbl image build.

Provides a tool to build boot Image for PBL(Pre boot loader) which is
used on Freescale CoreNet SoCs, PBL can be used to load some instructions
and/or data for pre-initialization. The default output image is u-boot.pbl,
for more details please refer to doc/README.pblimage.

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

1 files changed, 331 insertions, 0 deletions

diff --git a/tools/pblimage.c b/tools/pblimage.c
new file mode 100644
index 0000000..508a747
--- /dev/null
+++ b/tools/pblimage.c
@@ -0,0 +1,331 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#define _GNU_SOURCE
+
+#include "mkimage.h"
+#include <image.h>
+#include "pblimage.h"
+
+/*
+ * The PBL can load up to 64 bytes at a time, so we split the U-Boot
+ * image into 64 byte chunks. PBL needs a command for each piece, of
+ * the form "81xxxxxx", where "xxxxxx" is the offset. SYS_TEXT_BASE
+ * is 0xFFF80000 for PBL boot, and PBL only cares about low 24-bit,
+ * so it starts from 0x81F80000.
+ */
+static uint32_t next_pbl_cmd = 0x81F80000;
+/*
+ * need to store all bytes in memory for calculating crc32, then write the
+ * bytes to image file for PBL boot.
+ */
+static unsigned char mem_buf[600000];
+static unsigned char *pmem_buf = mem_buf;
+static int pbl_size;
+static char *fname = "Unknown";
+static int lineno = -1;
+static struct pbl_header pblimage_header;
+
+static union
+{
+	char c[4];
+	unsigned char l;
+} endian_test = { {'l', '?', '?', 'b'} };
+
+#define ENDIANNESS ((char)endian_test.l)
+
+static void generate_pbl_cmd(void)
+{
+	uint32_t val = next_pbl_cmd;
+	next_pbl_cmd += 0x40;
+	int i;
+
+	for (i = 3; i >= 0; i--) {
+		*pmem_buf++ = (val >> (i * 8)) & 0xff;
+		pbl_size++;
+	}
+}
+
+static void pbl_fget(size_t size, FILE *stream)
+{
+	unsigned char c;
+	int c_temp;
+
+	while (size && (c_temp = fgetc(stream)) != EOF) {
+		c = (unsigned char)c_temp;
+		*pmem_buf++ = c;
+		pbl_size++;
+		size--;
+	}
+}
+
+/* load split u-boot with PBI command 81xxxxxx. */
+static void load_uboot(FILE *fp_uboot)
+{
+	while (next_pbl_cmd < 0x82000000) {
+		generate_pbl_cmd();
+		pbl_fget(64, fp_uboot);
+	}
+}
+
+static void check_get_hexval(char *token)
+{
+	uint32_t hexval;
+	int i;
+
+	if (!sscanf(token, "%x", &hexval)) {
+		printf("Error:%s[%d] - Invalid hex data(%s)\n", fname,
+			lineno, token);
+		exit(EXIT_FAILURE);
+	}
+	for (i = 3; i >= 0; i--) {
+		*pmem_buf++ = (hexval >> (i * 8)) & 0xff;
+		pbl_size++;
+	}
+}
+
+static void pbl_parser(char *name)
+{
+	FILE *fd = NULL;
+	char *line = NULL;
+	char *token, *saveptr1, *saveptr2;
+	size_t len = 0;
+
+	fname = name;
+	fd = fopen(name, "r");
+	if (fd == NULL) {
+		printf("Error:%s - Can't open\n", fname);
+		exit(EXIT_FAILURE);
+	}
+
+	while ((getline(&line, &len, fd)) > 0) {
+		lineno++;
+		token = strtok_r(line, "\r\n", &saveptr1);
+		/* drop all lines with zero tokens (= empty lines) */
+		if (token == NULL)
+			continue;
+		for (line = token;; line = NULL) {
+			token = strtok_r(line, " \t", &saveptr2);
+			if (token == NULL)
+				break;
+			/* Drop all text starting with '#' as comments */
+			if (token[0] == '#')
+				break;
+			check_get_hexval(token);
+		}
+	}
+	if (line)
+		free(line);
+	fclose(fd);
+}
+
+static uint32_t crc_table[256];
+
+static void make_crc_table(void)
+{
+	uint32_t mask;
+	int i, j;
+	uint32_t poly; /* polynomial exclusive-or pattern */
+
+	/*
+	 * the polynomial used by PBL is 1 + x1 + x2 + x4 + x5 + x7 + x8 + x10
+	 * + x11 + x12 + x16 + x22 + x23 + x26 + x32.
+	 */
+	poly = 0x04c11db7;
+
+	for (i = 0; i < 256; i++) {
+		mask = i << 24;
+		for (j = 0; j < 8; j++) {
+			if (mask & 0x80000000)
+				mask = (mask << 1) ^ poly;
+			else
+				mask <<= 1;
+		}
+		crc_table[i] = mask;
+	}
+}
+
+unsigned long pbl_crc32(unsigned long crc, const char *buf, uint32_t len)
+{
+	uint32_t crc32_val = 0xffffffff;
+	uint32_t xor = 0x0;
+	int i;
+
+	make_crc_table();
+
+	for (i = 0; i < len; i++)
+		crc32_val = (crc32_val << 8) ^
+			crc_table[(crc32_val >> 24) ^ (*buf++ & 0xff)];
+
+	crc32_val = crc32_val ^ xor;
+	if (crc32_val < 0) {
+		crc32_val += 0xffffffff;
+		crc32_val += 1;
+	}
+	return crc32_val;
+}
+
+static uint32_t reverse_byte(uint32_t val)
+{
+	uint32_t temp;
+	unsigned char *p1;
+	int j;
+
+	temp = val;
+	p1 = (unsigned char *)&temp;
+	for (j = 3; j >= 0; j--)
+		*p1++ = (val >> (j * 8)) & 0xff;
+	return temp;
+}
+
+/* write end command and crc command to memory. */
+static void add_end_cmd(void)
+{
+	uint32_t pbl_end_cmd[4] = {0x09138000, 0x00000000,
+		0x091380c0, 0x00000000};
+	uint32_t crc32_pbl;
+	int i;
+	unsigned char *p = (unsigned char *)&pbl_end_cmd;
+
+	if (ENDIANNESS == 'l') {
+		for (i = 0; i < 4; i++)
+			pbl_end_cmd[i] = reverse_byte(pbl_end_cmd[i]);
+	}
+
+	for (i = 0; i < 16; i++) {
+		*pmem_buf++ = *p++;
+		pbl_size++;
+	}
+
+	/* Add PBI CRC command. */
+	*pmem_buf++ = 0x08;
+	*pmem_buf++ = 0x13;
+	*pmem_buf++ = 0x80;
+	*pmem_buf++ = 0x40;
+	pbl_size += 4;
+
+	/* calculated CRC32 and write it to memory. */
+	crc32_pbl = pbl_crc32(0, (const char *)mem_buf, pbl_size);
+	*pmem_buf++ = (crc32_pbl >> 24) & 0xff;
+	*pmem_buf++ = (crc32_pbl >> 16) & 0xff;
+	*pmem_buf++ = (crc32_pbl >> 8) & 0xff;
+	*pmem_buf++ = (crc32_pbl) & 0xff;
+	pbl_size += 4;
+
+	if ((pbl_size % 16) != 0) {
+		for (i = 0; i < 8; i++) {
+			*pmem_buf++ = 0x0;
+			pbl_size++;
+		}
+	}
+	if ((pbl_size % 16 != 0)) {
+		printf("Error: Bad size of image file\n");
+		exit(EXIT_FAILURE);
+	}
+}
+
+void pbl_load_uboot(int ifd, struct mkimage_params *params)
+{
+	FILE *fp_uboot;
+	int size;
+
+	/* parse the rcw.cfg file. */
+	pbl_parser(params->imagename);
+
+	/* parse the pbi.cfg file. */
+	pbl_parser(params->imagename2);
+
+	fp_uboot = fopen(params->datafile, "r");
+	if (fp_uboot == NULL) {
+		printf("Error: %s open failed\n", params->datafile);
+		exit(EXIT_FAILURE);
+	}
+
+	load_uboot(fp_uboot);
+	add_end_cmd();
+	fclose(fp_uboot);
+	lseek(ifd, 0, SEEK_SET);
+
+	size = pbl_size;
+	if (write(ifd, (const void *)&mem_buf, size) != size) {
+		fprintf(stderr, "Write error on %s: %s\n",
+			params->imagefile, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+}
+
+static int pblimage_check_image_types(uint8_t type)
+{
+	if (type == IH_TYPE_PBLIMAGE)
+		return EXIT_SUCCESS;
+	else
+		return EXIT_FAILURE;
+}
+
+static int pblimage_verify_header(unsigned char *ptr, int image_size,
+			struct mkimage_params *params)
+{
+	struct pbl_header *pbl_hdr = (struct pbl_header *) ptr;
+
+	/* Only a few checks can be done: search for magic numbers */
+	if (ENDIANNESS == 'l') {
+		if (pbl_hdr->preamble != reverse_byte(RCW_PREAMBLE))
+			return -FDT_ERR_BADSTRUCTURE;
+
+		if (pbl_hdr->rcwheader != reverse_byte(RCW_HEADER))
+			return -FDT_ERR_BADSTRUCTURE;
+	} else {
+		if (pbl_hdr->preamble != RCW_PREAMBLE)
+			return -FDT_ERR_BADSTRUCTURE;
+
+		if (pbl_hdr->rcwheader != RCW_HEADER)
+			return -FDT_ERR_BADSTRUCTURE;
+	}
+	return 0;
+}
+
+static void pblimage_print_header(const void *ptr)
+{
+	printf("Image Type:   Freescale PBL Boot Image\n");
+}
+
+static void pblimage_set_header(void *ptr, struct stat *sbuf, int ifd,
+				struct mkimage_params *params)
+{
+	/*nothing need to do, pbl_load_uboot takes care of whole file. */
+}
+
+/* pblimage parameters */
+static struct image_type_params pblimage_params = {
+	.name		= "Freescale PBL Boot Image support",
+	.header_size	= sizeof(struct pbl_header),
+	.hdr		= (void *)&pblimage_header,
+	.check_image_type = pblimage_check_image_types,
+	.verify_header	= pblimage_verify_header,
+	.print_header	= pblimage_print_header,
+	.set_header	= pblimage_set_header,
+};
+
+void init_pbl_image_type(void)
+{
+	pbl_size = 0;
+	mkimage_register(&pblimage_params);
+}