u-boot/arch/x86/lib/init_helpers.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2011
* Graeme Russ, <graeme.russ@gmail.com>
*/
#include <common.h>
#include <init.h>
#include <linux/errno.h>
#include <asm/mtrr.h>
DECLARE_GLOBAL_DATA_PTR;
int init_cache_f_r(void)
{
bool do_mtrr = CONFIG_IS_ENABLED(X86_32BIT_INIT) ||
IS_ENABLED(CONFIG_FSP_VERSION2);
int ret;
do_mtrr &= !IS_ENABLED(CONFIG_FSP_VERSION1) &&
!IS_ENABLED(CONFIG_SYS_SLIMBOOTLOADER);
if (do_mtrr) {
ret = mtrr_commit(false);
/*
* If MTRR MSR is not implemented by the processor, just ignore
* it
*/
if (ret && ret != -ENOSYS)
return ret;
}
if (!ll_boot_init())
return 0;
/* Initialise the CPU cache(s) */
return init_cache();
}