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/* fmap_from_fmd.c, tool to distill flashmap descriptors into raw FMAP sections */
/* SPDX-License-Identifier: GPL-2.0-only */
#include "fmap_from_fmd.h"
#include "common.h"
#include <assert.h>
#include <string.h>
static bool fmap_append_fmd_node(struct fmap **flashmap,
const struct flashmap_descriptor *section,
unsigned absolute_watermark) {
uint16_t flags = 0;
if (strlen(section->name) >= FMAP_STRLEN) {
ERROR("Section name ('%s') exceeds %d character FMAP format limit\n",
section->name, FMAP_STRLEN - 1);
return false;
}
absolute_watermark += section->offset;
if (section->flags.f.preserve)
flags |= FMAP_AREA_PRESERVE;
if (fmap_append_area(flashmap, absolute_watermark, section->size,
(uint8_t *)section->name, flags) < 0) {
ERROR("Failed to insert section '%s' into FMAP\n",
section->name);
return false;
}
fmd_foreach_child(subsection, section) {
if (!fmap_append_fmd_node(flashmap, subsection,
absolute_watermark))
return false;
}
return true;
}
struct fmap *fmap_from_fmd(const struct flashmap_descriptor *desc)
{
assert(desc);
assert(desc->size_known);
if (strlen(desc->name) >= FMAP_STRLEN) {
ERROR("Image name ('%s') exceeds %d character FMAP header limit\n",
desc->name, FMAP_STRLEN - 1);
return NULL;
}
struct fmap *fmap = fmap_create(desc->offset_known ? desc->offset : 0,
desc->size, (uint8_t *)desc->name);
if (!fmap) {
ERROR("Failed to allocate FMAP header\n");
return fmap;
}
fmd_foreach_child(real_section, desc) {
if (!fmap_append_fmd_node(&fmap, real_section, 0)) {
fmap_destroy(fmap);
return NULL;
}
}
return fmap;
}
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