340e4b8090
This adds a common cbmem_top implementation to all coreboot target. In romstage a static variable will be used to cache the result of cbmem_top_romstage. In ramstage if CONFIG_RAMSTAGE_CBMEM_TOP_ARG is set a global variable needs to be populated by the stage entry with the value passed via the calling arguments. if CONFIG_RAMSTAGE_CBMEM_TOP_ARG is not set the same implementation as will be used as in romstage. Change-Id: Ie767542ee25483acc9a56785ce20a885e9a63098 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36273 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2014 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <cbmem.h>
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#include <soc/soc_services.h>
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static int cbmem_backing_store_ready;
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void ipq_cbmem_backing_store_ready(void)
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{
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cbmem_backing_store_ready = 1;
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}
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void *cbmem_top_chipset(void)
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{
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/*
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* In romstage, make sure that cbmem backing store is ready before
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* returning pointer to cbmem top. Otherwise, it could lead to issues
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* with components that utilize cbmem in romstage (e.g. vboot_locator
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* for loading ipq blobs before DRAM is initialized).
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*/
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if (ENV_ROMSTAGE && (cbmem_backing_store_ready == 0))
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return NULL;
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return _memlayout_cbmem_top;
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}
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