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RT #73025. ea-lpc1788: install the checksum into u-boot image.
The checksum at predefined offset is required for execution of images from the LPC178X eNVM. This patch automates the creation of this checksum, the resulted images are u-boot-lpc.bin and u-boot-lpc.hex.
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| Original file line number | Diff line number | Diff line change |
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@@ -34,6 +34,7 @@ | |
| /u-boot.dis | ||
| /u-boot.lds | ||
| /u-boot.ubl | ||
| /u-boot-lpc.hex | ||
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| # | ||
| # Generated files | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -8,4 +8,5 @@ | |
| /ncp | ||
| /ubsha1 | ||
| /inca-swap-bytes | ||
| /lpc178x_fcg | ||
| /*.exe | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| /* | ||
| * Copyright (C) 2011 by NXP Semiconductors | ||
| * All rights reserved. | ||
| * | ||
| * @Author: Kevin Wells | ||
| * @Descr: Inserts checksum into FLASH image for LPC17xx devices | ||
| * | ||
| * 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., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| */ | ||
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| /* | ||
| * This LPC1788 requires a checksum of the first 7 words in FLASH to boot | ||
| * a user program. All this program does is compute the 2's complement | ||
| * checksum on the first 7 32-bit words and inserts it into the 8th 32-bit | ||
| * word - overwriting what is there. | ||
| * | ||
| * Note that some LPC1788 FLASH burners may already generate the checksum | ||
| */ | ||
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| #include <stdlib.h> | ||
| #include <stdio.h> | ||
| #include <string.h> | ||
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| /* | ||
| * Works for LPC1787and LPC1788, but adjust for other parts | ||
| */ | ||
| #define MAX_FLASH_SIZE (512 * 1024) | ||
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| int main(int argc, char *argv[]) | ||
| { | ||
| FILE *fp = NULL; | ||
| char *filename, *nfilename; | ||
| unsigned int cksum, *buff; | ||
| size_t fsize; | ||
| int i, ret = 0; | ||
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| if (argc != 3) | ||
| { | ||
| printf("Usage: %s infile outfile\n", argv[0]); | ||
| return 1; | ||
| } | ||
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| /* Enough for a 512K image to burn */ | ||
| buff = (unsigned int *) malloc(MAX_FLASH_SIZE); | ||
| if (!buff) { | ||
| printf("Error allocating memory for buffer\n"); | ||
| return 1; | ||
| } | ||
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| filename = (char *) argv[1]; | ||
| fp = fopen((const char *) filename, "r"); | ||
| if (!fp) { | ||
| printf("Error opening file %s\n", filename); | ||
| ret = 1; | ||
| goto free_buff; | ||
| } | ||
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| /* Load file and save file size */ | ||
| fsize = fread((void *) buff, 1, MAX_FLASH_SIZE, fp); | ||
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| if (ferror(fp)) { | ||
| printf("Error loading file %s\n", filename); | ||
| ret = 1; | ||
| goto close_file; | ||
| } | ||
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| if (!feof(fp)) { | ||
| printf("File %s is too large. The maximum size is " | ||
| "limited by FLASH (%d bytes)\n", filename, | ||
| MAX_FLASH_SIZE); | ||
| ret = 1; | ||
| goto close_file; | ||
| } | ||
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| printf("File %s loaded with size %d bytes\n", filename, (int) fsize); | ||
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| fclose(fp); | ||
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| nfilename = (char *) argv[2]; | ||
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| /* Open new file for writing */ | ||
| fp = fopen(nfilename, "w"); | ||
| if (!fp) { | ||
| printf("Error creating new file %s\n", nfilename); | ||
| ret = 1; | ||
| goto free_buff; | ||
| } | ||
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| /* Compute 2's complement checksum */ | ||
| cksum = 0; | ||
| for (i = 0; i < 7; i++) { | ||
| cksum += buff[i]; | ||
| printf("Word %d: 0x%08x\n", i, buff[i]); | ||
| } | ||
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| buff[7] = 0xFFFFFFFF - cksum + 1; | ||
| printf("Word 7: 0x%08x (cksum total: 0x%08x)\n", buff[7], | ||
| (cksum + buff[7])); | ||
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| /* Write data back to file */ | ||
| if (fwrite(buff, 1, fsize, fp) != fsize) { | ||
| printf("Error writing new file %s\n", nfilename); | ||
| ret = 1; | ||
| goto close_file; | ||
| } | ||
| printf("File %s created with size %d bytes\n", nfilename, | ||
| (int) fsize); | ||
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| close_file: | ||
| fclose(fp); | ||
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| free_buff: | ||
| free(buff); | ||
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| return ret; | ||
| } | ||
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