u-boot/tools/pblimage.c

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/*
* Copyright 2012 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include "mkimage.h"
#include <image.h>
#include "pblimage.h"
/*
* Initialize to an invalid value.
*/
static uint32_t next_pbl_cmd = 0x82000000;
/*
* 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[1000000];
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)
/*
* 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. Calculate the
* start offset by subtracting the size of the u-boot image from the
* top of the allowable 24-bit range.
*/
static void init_next_pbl_cmd(FILE *fp_uboot)
{
struct stat st;
int fd = fileno(fp_uboot);
if (fstat(fd, &st) == -1) {
printf("Error: Could not determine u-boot image size. %s\n",
strerror(errno));
exit(EXIT_FAILURE);
}
next_pbl_cmd = 0x82000000 - st.st_size;
}
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)
{
init_next_pbl_cmd(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);
}