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