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73f802ac95
Define and parse the header of the First Mutable Code (FMC) of AST2700 SoCs at runtime phase. The FMC header contains the information to load prebuilt binaries required for device initialization such as DRAM and VGA. Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
65 lines
1.1 KiB
C
65 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) Aspeed Technology Inc.
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*/
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#include <asm/arch/fmc_hdr.h>
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#include <asm/io.h>
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#include <asm/sections.h>
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#include <errno.h>
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#include <spl.h>
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#include <string.h>
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int fmc_hdr_get_prebuilt(uint32_t type, uint32_t *ofst, uint32_t *size)
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{
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struct fmc_hdr_preamble *preamble;
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struct fmc_hdr_body *body;
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struct fmc_hdr *hdr;
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uint32_t t, s, o;
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int i;
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if (type >= PBT_NUM)
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return -EINVAL;
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if (!ofst || !size)
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return -EINVAL;
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hdr = (struct fmc_hdr *)(_start - sizeof(*hdr));
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preamble = &hdr->preamble;
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body = &hdr->body;
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if (preamble->magic != HDR_MAGIC)
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return -EIO;
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for (i = 0, o = sizeof(*hdr) + body->fmc_size; i < HDR_PB_MAX; ++i) {
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t = body->pbs[i].type;
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s = body->pbs[i].size;
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/* skip if unrecognized, yet */
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if (t >= PBT_NUM) {
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o += s;
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continue;
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}
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/* prebuilt end mark */
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if (t == 0 && s == 0)
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break;
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/* return the prebuilt info if found */
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if (t == type) {
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*ofst = o;
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*size = s;
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goto found;
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}
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/* update offset for next prebuilt */
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o += s;
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}
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return -ENODATA;
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found:
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return 0;
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}
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