50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2011
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* Graeme Russ, <graeme.russ@gmail.com>
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*/
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#include <common.h>
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#include <init.h>
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#include <asm/global_data.h>
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#include <linux/errno.h>
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#include <asm/mtrr.h>
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DECLARE_GLOBAL_DATA_PTR;
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int init_cache_f_r(void)
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{
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bool do_mtrr = CONFIG_IS_ENABLED(X86_32BIT_INIT) ||
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IS_ENABLED(CONFIG_FSP_VERSION2);
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int ret;
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/*
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* Supported configurations:
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*
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* booting from slimbootloader - in that case the MTRRs are already set
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* up
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* booting with FSPv1 - MTRRs are already set up
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* booting with FSPv2 - MTRRs must be set here
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* booting from coreboot - in this case there is no SPL, so we set up
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* the MTRRs here
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* Note: if there is an SPL, then it has already set up MTRRs so we
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* don't need to do that here
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*/
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do_mtrr &= !IS_ENABLED(CONFIG_SPL) &&
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!IS_ENABLED(CONFIG_FSP_VERSION1) &&
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!IS_ENABLED(CONFIG_SYS_SLIMBOOTLOADER);
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if (do_mtrr) {
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ret = mtrr_commit(false);
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/*
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* If MTRR MSR is not implemented by the processor, just ignore
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* it
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*/
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if (ret && ret != -ENOSYS)
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return ret;
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}
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/* Initialise the CPU cache(s) */
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return init_cache();
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}
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