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https://github.com/Telecominfraproject/OpenCellular.git
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c0777be638
The functions that look for the FMAP and its entries should return more useful values. BUG=none BRANCH=ToT TEST=make runtests No functional changes. Change-Id: I4b62ea0de972bceb3d58f4ee8eb82ad065ddcbae Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/214630 Reviewed-by: Randall Spangler <rspangler@chromium.org>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/*
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* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "fmap.h"
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/* Find and point to the FMAP header within the buffer */
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FmapHeader *fmap_find(uint8_t *ptr, size_t size)
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{
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size_t i;
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FmapHeader *fmap_header;
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for (i=0; i<size; i += FMAP_SEARCH_STRIDE, ptr += FMAP_SEARCH_STRIDE) {
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if (0 != memcmp(ptr, FMAP_SIGNATURE, FMAP_SIGNATURE_SIZE))
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continue;
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fmap_header = (FmapHeader *)ptr;
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if (fmap_header->fmap_ver_major == FMAP_VER_MAJOR)
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return fmap_header;
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}
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return NULL;
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}
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/* Search for an area by name, return pointer to its beginning */
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uint8_t *fmap_find_by_name(uint8_t *ptr, size_t size, FmapHeader *fmap,
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const char *name, FmapAreaHeader **ah_ptr)
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{
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int i;
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FmapAreaHeader *ah;
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if (!fmap)
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fmap = fmap_find(ptr, size);
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if (!fmap)
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return NULL;
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ah = (FmapAreaHeader*)((void *)fmap + sizeof(FmapHeader));
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for (i = 0; i < fmap->fmap_nareas; i++)
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if (!strncmp(ah[i].area_name, name, FMAP_NAMELEN)) {
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if (ah_ptr)
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*ah_ptr = ah + i;
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return ptr + ah[i].area_offset;
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}
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return NULL;
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}
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