mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 00:18:51 +09:00
![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
330 lines
7.3 KiB
C
330 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2012-2014 Freescale Semiconductor, Inc.
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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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#include "pbl_crc32.h"
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#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
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#define PBL_ACS_CONT_CMD 0x81000000
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#define PBL_ADDR_24BIT_MASK 0x00ffffff
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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 int uboot_size;
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static int arch_flag;
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static uint32_t pbl_cmd_initaddr;
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static uint32_t pbi_crc_cmd1;
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static uint32_t pbi_crc_cmd2;
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static uint32_t pbl_end_cmd[4];
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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 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 = 0xff;
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int c_temp;
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while (size) {
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c_temp = fgetc(stream);
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if (c_temp != EOF)
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c = (unsigned char)c_temp;
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else if ((c_temp == EOF) && (arch_flag == IH_ARCH_ARM))
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c = 0xff;
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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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next_pbl_cmd = pbl_cmd_initaddr - uboot_size;
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while (next_pbl_cmd < pbl_cmd_initaddr) {
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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 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 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++ = pbi_crc_cmd1;
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*pmem_buf++ = pbi_crc_cmd2;
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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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}
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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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if (params->imagename2[0] != '\0')
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pbl_parser(params->imagename2);
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if (params->datafile) {
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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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fclose(fp_uboot);
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}
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add_end_cmd();
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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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int pblimage_check_params(struct image_tool_params *params)
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{
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FILE *fp_uboot;
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int fd;
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struct stat st;
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if (!params)
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return EXIT_FAILURE;
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if (params->datafile) {
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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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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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/* For the variable size, pad it to 64 byte boundary */
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uboot_size = roundup(st.st_size, 64);
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fclose(fp_uboot);
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}
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if (params->arch == IH_ARCH_ARM) {
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arch_flag = IH_ARCH_ARM;
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pbi_crc_cmd1 = 0x61;
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pbi_crc_cmd2 = 0;
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pbl_cmd_initaddr = params->addr & PBL_ADDR_24BIT_MASK;
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pbl_cmd_initaddr |= PBL_ACS_CONT_CMD;
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pbl_cmd_initaddr += uboot_size;
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pbl_end_cmd[0] = 0x09610000;
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pbl_end_cmd[1] = 0x00000000;
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pbl_end_cmd[2] = 0x096100c0;
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pbl_end_cmd[3] = 0x00000000;
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} else if (params->arch == IH_ARCH_PPC) {
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arch_flag = IH_ARCH_PPC;
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pbi_crc_cmd1 = 0x13;
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pbi_crc_cmd2 = 0x80;
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pbl_cmd_initaddr = 0x82000000;
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pbl_end_cmd[0] = 0x091380c0;
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pbl_end_cmd[1] = 0x00000000;
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pbl_end_cmd[2] = 0x091380c0;
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pbl_end_cmd[3] = 0x00000000;
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}
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next_pbl_cmd = pbl_cmd_initaddr;
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return 0;
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};
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/* pblimage parameters */
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U_BOOT_IMAGE_TYPE(
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pblimage,
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"Freescale PBL Boot Image support",
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sizeof(struct pbl_header),
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(void *)&pblimage_header,
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pblimage_check_params,
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pblimage_verify_header,
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pblimage_print_header,
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pblimage_set_header,
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NULL,
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pblimage_check_image_types,
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NULL,
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NULL
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);
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