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tools: kwbimage: Simplify aligning and calculating checksum

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The return value of kwbimage_generate() is used for aligning the data
part of kwbimage. Use it for calculating proper 4 byte alignment as is
required by BootROM and also use it for allocating additional 4 bytes
for the 32-bit data checksum.

This simplifies the alignment code to be only at one place (in function
kwbimage_generate) and also simplifies setting checksum as it can be
directly updated in memory.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Chris Packham <judge.packham@gmail.com>
Tested-by: Chris Packham <judge.packham@gmail.com>
This commit is contained in:
Pali Rohár 2021-07-23 11:13:56 +02:00 committed by Stefan Roese
parent 8ab9c6be69
commit 37cb9c15d7
1 changed files with 15 additions and 21 deletions
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36
tools/kwbimage.c
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@ -891,7 +891,7 @@ static void *image_create_v0(size_t *imagesz, struct image_tool_params *params,
/* Fill in the main header */
main_hdr->blocksize =
cpu_to_le32(payloadsz + sizeof(uint32_t) - headersz);
cpu_to_le32(payloadsz - headersz);
main_hdr->srcaddr = cpu_to_le32(headersz);
main_hdr->ext = has_ext;
main_hdr->destaddr = cpu_to_le32(params->addr);
@ -1249,7 +1249,7 @@ static void *image_create_v1(size_t *imagesz, struct image_tool_params *params,
/* Fill the main header */
main_hdr->blocksize =
cpu_to_le32(payloadsz - headersz + sizeof(uint32_t));
cpu_to_le32(payloadsz - headersz);
main_hdr->headersz_lsb = cpu_to_le16(headersz & 0xFFFF);
main_hdr->headersz_msb = (headersz & 0xFFFF0000) >> 16;
main_hdr->destaddr = cpu_to_le32(params->addr)
@ -1519,7 +1519,6 @@ static void kwbimage_set_header(void *ptr, struct stat *sbuf, int ifd,
size_t headersz = 0;
uint32_t checksum;
int ret;
int size;
fcfg = fopen(params->imagename, "r");
if (!fcfg) {
@ -1547,9 +1546,6 @@ static void kwbimage_set_header(void *ptr, struct stat *sbuf, int ifd,
exit(EXIT_FAILURE);
}
/* The MVEBU BootROM does not allow non word aligned payloads */
sbuf->st_size = ALIGN(sbuf->st_size, 4);
version = image_get_version();
switch (version) {
/*
@ -1580,16 +1576,10 @@ static void kwbimage_set_header(void *ptr, struct stat *sbuf, int ifd,
free(image_cfg);
/* Build and add image checksum header */
checksum =
cpu_to_le32(image_checksum32((uint32_t *)ptr, sbuf->st_size));
size = write(ifd, &checksum, sizeof(uint32_t));
if (size != sizeof(uint32_t)) {
fprintf(stderr, "Error:%s - Checksum write %d bytes %s\n",
params->cmdname, size, params->imagefile);
exit(EXIT_FAILURE);
}
sbuf->st_size += sizeof(uint32_t);
checksum = cpu_to_le32(image_checksum32((uint8_t *)ptr + headersz,
sbuf->st_size - headersz - sizeof(uint32_t)));
memcpy((uint8_t *)ptr + sbuf->st_size - sizeof(uint32_t), &checksum,
sizeof(uint32_t));
/* Finally copy the header into the image area */
memcpy(ptr, image, headersz);
@ -1650,6 +1640,7 @@ static int kwbimage_generate(struct image_tool_params *params,
struct image_type_params *tparams)
{
FILE *fcfg;
struct stat s;
int alloc_len;
int version;
void *hdr;
@ -1662,6 +1653,12 @@ static int kwbimage_generate(struct image_tool_params *params,
exit(EXIT_FAILURE);
}
if (stat(params->datafile, &s)) {
fprintf(stderr, "Could not stat data file %s: %s\n",
params->datafile, strerror(errno));
exit(EXIT_FAILURE);
}
image_cfg = malloc(IMAGE_CFG_ELEMENT_MAX *
sizeof(struct image_cfg_element));
if (!image_cfg) {
@ -1719,12 +1716,9 @@ static int kwbimage_generate(struct image_tool_params *params,
/*
* The resulting image needs to be 4-byte aligned. At least
* the Marvell hdrparser tool complains if its unaligned.
* By returning 1 here in this function, called via
* tparams->vrec_header() in mkimage.c, mkimage will
* automatically pad the the resulting image to a 4-byte
* size if necessary.
* After the image data is stored 4-byte checksum.
*/
return 1;
return 4 + (4 - s.st_size % 4) % 4;
}
/*