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/******************************************************************************
* Copyright (c) 2004, 2008 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#include <assert.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <cfgparse.h>
#include <time.h>
#include <calculatecrc.h>
#include <product.h>
#include "createcrc.h"
#include "crclib.h"
/* file length in bytes */
static uint64_t ui64globalFileSize = 0;
/* space for the file stream >= 4MB + 4bytes */
static unsigned char pucFileStream[4400000];
/* header length in bytes */
static uint64_t ui64globalHeaderSize = 0;
/* flag to filter detect the header in buildDataStream() */
static int iglobalHeaderFlag = 1;
static size_t min(size_t a, size_t b)
{
return a < b ? a : b;
}
/**
* Build the file image and store it as Data Stream of bytes
* calculate a first CRC for the first file and
* catch the position of this CRC
*/
int
buildDataStream(unsigned char *pucbuf, int size)
{
if (ui64globalFileSize + size > sizeof(pucFileStream)) {
printf("Error: File size is too big!\n");
return -1;
}
/* copy the data into the destination buffer */
memcpy(pucFileStream + ui64globalFileSize, pucbuf, size);
ui64globalFileSize += size;
if (iglobalHeaderFlag == 1) { // catch header
ui64globalHeaderSize = ui64globalFileSize;
iglobalHeaderFlag = 0;
}
return 0;
}
/**
* write Header.img
*/
int
createHeaderImage(int notime)
{
int iCounter;
uint64_t ui64RomAddr, ui64DataAddr;
time_t caltime;
struct tm *tm;
char *pcVersion;
char dastr[16] = { 0, };
unsigned long long da = 0;
struct stH stHeader = {
.magic = FLASHFS_MAGIC,
.platform_name = FLASHFS_PLATFORM_MAGIC,
.platform_revision = FLASHFS_PLATFORM_REVISION,
.ui64FileEnd = -1,
};
/* read driver info */
pcVersion = getenv("DRIVER_NAME");
if (!pcVersion)
pcVersion = getenv("USER");
if (!pcVersion)
pcVersion = "unknown";
memcpy(stHeader.version, pcVersion,
min(strlen(pcVersion), sizeof(stHeader.version)));
if (!notime) {
/* read time and write it into data stream */
char *source_date_epoch;
/* This assumes that (if set) the SOURCE_DATE_EPOCH environment variable
will contain a correct, positive integer in the time_t range */
if ((source_date_epoch = getenv("SOURCE_DATE_EPOCH")) == NULL ||
(caltime = (time_t)strtoll(source_date_epoch, NULL, 10)) <= 0)
caltime = time(NULL);
if (caltime == -1) {
printf("time error\n");
}
if ((tm = localtime(&caltime)) == NULL) {
printf("local time error\n");
}
// length must be 13 instead 12 because of terminating
// NUL. Therefore uH.stH.platform_revison must be
// written later to overwrite the terminating NUL
if (strftime(dastr, 15, "0x%Y%m%d%H%M", tm) == 0) {
printf("strftime error\n");
}
da = cpu_to_be64(strtoll(dastr, NULL, 16));
}
memcpy(stHeader.date, &da, 8);
/* read address of next file and address of header date, both are 64 bit values */
ui64RomAddr = 0;
ui64DataAddr = 0;
for (iCounter = 0; iCounter < 8; iCounter++) {
/* addr of next file */
ui64RomAddr = (ui64RomAddr << 8) + pucFileStream[FLASHFS_ROMADDR + iCounter];
/* addr of header data */
ui64DataAddr = (ui64DataAddr << 8) + pucFileStream[FLASHFS_DATADDR + iCounter];
}
/* calculate final flash-header-size and flash-file-size */
/* calculate end addr of header */
ui64globalHeaderSize = (uint32_t) ui64DataAddr + sizeof(stHeader);
/* cut 64 bit to place CRC for File-End */
ui64globalHeaderSize -= 8;
/* add 64 bit to place CRC behind File-End */
ui64globalFileSize += 8;
if (ui64globalHeaderSize >= ui64RomAddr) {
printf("%s\n", "--- Header File to long");
return 1;
}
/* fill free space in Header with zeros */
memset(&pucFileStream[ui64DataAddr], 0, (ui64RomAddr - ui64DataAddr));
/* place data to header */
memcpy(&pucFileStream[ui64DataAddr], &stHeader, sizeof(stHeader));
/* insert header length into data stream */
*(uint64_t *) (pucFileStream + FLASHFS_HEADER_SIZE_ADDR) =
cpu_to_be64(ui64globalHeaderSize);
/* insert flash length into data stream */
*(uint64_t *) (pucFileStream + ui64DataAddr + FLASHFS_FILE_SIZE_ADDR) =
cpu_to_be64(ui64globalFileSize);
/* insert zeros as placeholder for CRC */
*(uint64_t *) (pucFileStream + ui64globalHeaderSize - 8) = 0;
*(uint64_t *) (pucFileStream + ui64globalFileSize - 8) = 0;
return 0;
}
/**
* insert header and file CRC into data stream
* do CRC check on header and file
* write data stream to disk
*/
int
writeDataStream(int iofd, int notime)
{
uint64_t ui64FileCRC = 0, ui64HeaderCRC = 0, ui64RegisterMask;
unsigned int uiRegisterLength;
if (0 != createHeaderImage(notime)) {
return 1;
}
createCRCParameter(&ui64RegisterMask, &uiRegisterLength);
/* calculate CRC */
ui64HeaderCRC = checkCRC(pucFileStream, ui64globalHeaderSize, 0);
*(uint64_t *) (pucFileStream + ui64globalHeaderSize - 8) =
cpu_to_be64(ui64HeaderCRC);
ui64FileCRC = checkCRC(pucFileStream, ui64globalFileSize, 0);
*(uint64_t *) (pucFileStream + ui64globalFileSize - 8) =
cpu_to_be64(ui64FileCRC);
/* check CRC-implementation */
ui64HeaderCRC = calCRCword(pucFileStream, ui64globalHeaderSize, 0);
ui64FileCRC = calCRCword(pucFileStream, ui64globalFileSize, 0);
if ((ui64HeaderCRC != 0) || (ui64FileCRC != 0)) {
printf("\n\n %s \n %s \n\n", "CRCs not correct implemented.",
" ---> Data will not be written do disk.");
return -1;
}
/* write file image to disk */
if (0 < write(iofd, pucFileStream, ui64globalFileSize))
return 0;
printf("<< write failed >>\n");
return -1;
}
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