332 lines
7.0 KiB
C
332 lines
7.0 KiB
C
/*
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* Copyright 2012 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include "imagetool.h"
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#include <image.h>
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#include "pblimage.h"
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/*
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* Initialize to an invalid value.
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*/
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static uint32_t next_pbl_cmd = 0x82000000;
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/*
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* need to store all bytes in memory for calculating crc32, then write the
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* bytes to image file for PBL boot.
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*/
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static unsigned char mem_buf[1000000];
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static unsigned char *pmem_buf = mem_buf;
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static int pbl_size;
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static char *fname = "Unknown";
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static int lineno = -1;
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static struct pbl_header pblimage_header;
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static union
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{
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char c[4];
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unsigned char l;
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} endian_test = { {'l', '?', '?', 'b'} };
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#define ENDIANNESS ((char)endian_test.l)
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/*
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* The PBL can load up to 64 bytes at a time, so we split the U-Boot
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* image into 64 byte chunks. PBL needs a command for each piece, of
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* the form "81xxxxxx", where "xxxxxx" is the offset. Calculate the
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* start offset by subtracting the size of the u-boot image from the
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* top of the allowable 24-bit range.
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*/
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static void init_next_pbl_cmd(FILE *fp_uboot)
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{
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struct stat st;
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int fd = fileno(fp_uboot);
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if (fstat(fd, &st) == -1) {
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printf("Error: Could not determine u-boot image size. %s\n",
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strerror(errno));
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exit(EXIT_FAILURE);
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}
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next_pbl_cmd = 0x82000000 - st.st_size;
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}
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static void generate_pbl_cmd(void)
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{
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uint32_t val = next_pbl_cmd;
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next_pbl_cmd += 0x40;
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int i;
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for (i = 3; i >= 0; i--) {
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*pmem_buf++ = (val >> (i * 8)) & 0xff;
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pbl_size++;
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}
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}
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static void pbl_fget(size_t size, FILE *stream)
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{
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unsigned char c;
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int c_temp;
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while (size && (c_temp = fgetc(stream)) != EOF) {
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c = (unsigned char)c_temp;
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*pmem_buf++ = c;
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pbl_size++;
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size--;
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}
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}
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/* load split u-boot with PBI command 81xxxxxx. */
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static void load_uboot(FILE *fp_uboot)
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{
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init_next_pbl_cmd(fp_uboot);
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while (next_pbl_cmd < 0x82000000) {
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generate_pbl_cmd();
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pbl_fget(64, fp_uboot);
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}
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}
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static void check_get_hexval(char *token)
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{
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uint32_t hexval;
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int i;
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if (!sscanf(token, "%x", &hexval)) {
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printf("Error:%s[%d] - Invalid hex data(%s)\n", fname,
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lineno, token);
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exit(EXIT_FAILURE);
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}
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for (i = 3; i >= 0; i--) {
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*pmem_buf++ = (hexval >> (i * 8)) & 0xff;
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pbl_size++;
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}
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}
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static void pbl_parser(char *name)
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{
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FILE *fd = NULL;
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char *line = NULL;
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char *token, *saveptr1, *saveptr2;
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size_t len = 0;
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fname = name;
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fd = fopen(name, "r");
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if (fd == NULL) {
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printf("Error:%s - Can't open\n", fname);
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exit(EXIT_FAILURE);
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}
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while ((getline(&line, &len, fd)) > 0) {
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lineno++;
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token = strtok_r(line, "\r\n", &saveptr1);
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/* drop all lines with zero tokens (= empty lines) */
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if (token == NULL)
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continue;
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for (line = token;; line = NULL) {
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token = strtok_r(line, " \t", &saveptr2);
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if (token == NULL)
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break;
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/* Drop all text starting with '#' as comments */
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if (token[0] == '#')
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break;
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check_get_hexval(token);
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}
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}
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if (line)
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free(line);
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fclose(fd);
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}
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static uint32_t crc_table[256];
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static void make_crc_table(void)
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{
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uint32_t mask;
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int i, j;
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uint32_t poly; /* polynomial exclusive-or pattern */
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/*
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* the polynomial used by PBL is 1 + x1 + x2 + x4 + x5 + x7 + x8 + x10
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* + x11 + x12 + x16 + x22 + x23 + x26 + x32.
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*/
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poly = 0x04c11db7;
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for (i = 0; i < 256; i++) {
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mask = i << 24;
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for (j = 0; j < 8; j++) {
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if (mask & 0x80000000)
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mask = (mask << 1) ^ poly;
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else
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mask <<= 1;
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}
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crc_table[i] = mask;
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}
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}
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unsigned long pbl_crc32(unsigned long crc, const char *buf, uint32_t len)
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{
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uint32_t crc32_val = 0xffffffff;
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uint32_t xor = 0x0;
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int i;
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make_crc_table();
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for (i = 0; i < len; i++)
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crc32_val = (crc32_val << 8) ^
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crc_table[(crc32_val >> 24) ^ (*buf++ & 0xff)];
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crc32_val = crc32_val ^ xor;
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if (crc32_val < 0) {
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crc32_val += 0xffffffff;
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crc32_val += 1;
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}
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return crc32_val;
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}
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static uint32_t reverse_byte(uint32_t val)
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{
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uint32_t temp;
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unsigned char *p1;
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int j;
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temp = val;
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p1 = (unsigned char *)&temp;
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for (j = 3; j >= 0; j--)
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*p1++ = (val >> (j * 8)) & 0xff;
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return temp;
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}
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/* write end command and crc command to memory. */
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static void add_end_cmd(void)
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{
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uint32_t pbl_end_cmd[4] = {0x09138000, 0x00000000,
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0x091380c0, 0x00000000};
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uint32_t crc32_pbl;
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int i;
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unsigned char *p = (unsigned char *)&pbl_end_cmd;
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if (ENDIANNESS == 'l') {
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for (i = 0; i < 4; i++)
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pbl_end_cmd[i] = reverse_byte(pbl_end_cmd[i]);
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}
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for (i = 0; i < 16; i++) {
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*pmem_buf++ = *p++;
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pbl_size++;
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}
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/* Add PBI CRC command. */
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*pmem_buf++ = 0x08;
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*pmem_buf++ = 0x13;
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*pmem_buf++ = 0x80;
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*pmem_buf++ = 0x40;
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pbl_size += 4;
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/* calculated CRC32 and write it to memory. */
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crc32_pbl = pbl_crc32(0, (const char *)mem_buf, pbl_size);
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*pmem_buf++ = (crc32_pbl >> 24) & 0xff;
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*pmem_buf++ = (crc32_pbl >> 16) & 0xff;
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*pmem_buf++ = (crc32_pbl >> 8) & 0xff;
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*pmem_buf++ = (crc32_pbl) & 0xff;
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pbl_size += 4;
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if ((pbl_size % 16) != 0) {
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for (i = 0; i < 8; i++) {
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*pmem_buf++ = 0x0;
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pbl_size++;
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}
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}
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if ((pbl_size % 16 != 0)) {
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printf("Error: Bad size of image file\n");
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exit(EXIT_FAILURE);
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}
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}
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void pbl_load_uboot(int ifd, struct image_tool_params *params)
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{
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FILE *fp_uboot;
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int size;
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/* parse the rcw.cfg file. */
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pbl_parser(params->imagename);
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/* parse the pbi.cfg file. */
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pbl_parser(params->imagename2);
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fp_uboot = fopen(params->datafile, "r");
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if (fp_uboot == NULL) {
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printf("Error: %s open failed\n", params->datafile);
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exit(EXIT_FAILURE);
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}
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load_uboot(fp_uboot);
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add_end_cmd();
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fclose(fp_uboot);
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lseek(ifd, 0, SEEK_SET);
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size = pbl_size;
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if (write(ifd, (const void *)&mem_buf, size) != size) {
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fprintf(stderr, "Write error on %s: %s\n",
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params->imagefile, strerror(errno));
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exit(EXIT_FAILURE);
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}
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}
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static int pblimage_check_image_types(uint8_t type)
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{
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if (type == IH_TYPE_PBLIMAGE)
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return EXIT_SUCCESS;
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else
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return EXIT_FAILURE;
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}
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static int pblimage_verify_header(unsigned char *ptr, int image_size,
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struct image_tool_params *params)
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{
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struct pbl_header *pbl_hdr = (struct pbl_header *) ptr;
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/* Only a few checks can be done: search for magic numbers */
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if (ENDIANNESS == 'l') {
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if (pbl_hdr->preamble != reverse_byte(RCW_PREAMBLE))
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return -FDT_ERR_BADSTRUCTURE;
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if (pbl_hdr->rcwheader != reverse_byte(RCW_HEADER))
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return -FDT_ERR_BADSTRUCTURE;
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} else {
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if (pbl_hdr->preamble != RCW_PREAMBLE)
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return -FDT_ERR_BADSTRUCTURE;
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if (pbl_hdr->rcwheader != RCW_HEADER)
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return -FDT_ERR_BADSTRUCTURE;
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}
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return 0;
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}
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static void pblimage_print_header(const void *ptr)
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{
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printf("Image Type: Freescale PBL Boot Image\n");
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}
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static void pblimage_set_header(void *ptr, struct stat *sbuf, int ifd,
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struct image_tool_params *params)
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{
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/*nothing need to do, pbl_load_uboot takes care of whole file. */
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}
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/* pblimage parameters */
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static struct image_type_params pblimage_params = {
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.name = "Freescale PBL Boot Image support",
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.header_size = sizeof(struct pbl_header),
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.hdr = (void *)&pblimage_header,
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.check_image_type = pblimage_check_image_types,
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.verify_header = pblimage_verify_header,
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.print_header = pblimage_print_header,
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.set_header = pblimage_set_header,
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};
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void init_pbl_image_type(void)
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{
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pbl_size = 0;
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register_image_type(&pblimage_params);
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}
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