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 <linux/errno.h>
#include <asm/mtrr.h>
DECLARE_GLOBAL_DATA_PTR;
/* Get the top of usable RAM */
__weak ulong board_get_usable_ram_top(ulong total_size)
{
return gd->ram_size;
}
int init_cache_f_r(void)
{
#if (CONFIG_IS_ENABLED(X86_32BIT_INIT) || \
(!defined(CONFIG_SPL_BUILD) && \
!CONFIG_IS_ENABLED(CONFIG_X86_RUN_64BIT))) && \
!defined(CONFIG_HAVE_FSP)
int ret;
ret = mtrr_commit(false);
/* If MTRR MSR is not implemented by the processor, just ignore it */
if (ret && ret != -ENOSYS)
return ret;
#endif
/* Initialise the CPU cache(s) */
return init_cache();
}