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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Google Inc
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/cache.h>
#include <arch/lib_helpers.h>
#include <arch/startup.h>
#include <console/console.h>
/* This space is defined in stage_entry.S. */
extern u8 _arm64_startup_data[];
static inline void save_element(size_t index, uint64_t val)
{
uint64_t *ptr = (uint64_t *)_arm64_startup_data;
ptr[index] = val;
}
/*
* startup_save_cpu_data is used to save register values that need to be setup
* when a CPU starts booting. This is used by secondary CPUs as well as resume
* path to directly setup MMU and other related registers.
*/
void startup_save_cpu_data(void)
{
save_element(MAIR_INDEX, raw_read_mair_current());
save_element(TCR_INDEX, raw_read_tcr_current());
save_element(TTBR0_INDEX, raw_read_ttbr0_current());
save_element(VBAR_INDEX, raw_read_vbar_current());
save_element(CNTFRQ_INDEX, raw_read_cntfrq_el0());
save_element(CPACR_INDEX, raw_read_cpacr_el1());
if (get_current_el() == EL3) {
save_element(SCR_INDEX, raw_read_scr_el3());
save_element(CPTR_INDEX, raw_read_cptr_el3());
}
dcache_clean_by_mva(_arm64_startup_data,
NUM_ELEMENTS * PER_ELEMENT_SIZE_BYTES);
}
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