arm_cci.c 1.72 KB
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/*
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 * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
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 *
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 * SPDX-License-Identifier: BSD-3-Clause
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 */

#include <arch.h>
#include <cci.h>
#include <plat_arm.h>
#include <platform_def.h>
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#include <utils.h>
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static const int cci_map[] = {
	PLAT_ARM_CCI_CLUSTER0_SL_IFACE_IX,
	PLAT_ARM_CCI_CLUSTER1_SL_IFACE_IX
};

/******************************************************************************
 * The following functions are defined as weak to allow a platform to override
 * the way ARM CCI driver is initialised and used.
 *****************************************************************************/
#pragma weak plat_arm_interconnect_init
#pragma weak plat_arm_interconnect_enter_coherency
#pragma weak plat_arm_interconnect_exit_coherency


/******************************************************************************
 * Helper function to initialize ARM CCI driver.
 *****************************************************************************/
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void __init plat_arm_interconnect_init(void)
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{
	cci_init(PLAT_ARM_CCI_BASE, cci_map, ARRAY_SIZE(cci_map));
}

/******************************************************************************
 * Helper function to place current master into coherency
 *****************************************************************************/
void plat_arm_interconnect_enter_coherency(void)
{
	cci_enable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
}

/******************************************************************************
 * Helper function to remove current master from coherency
 *****************************************************************************/
void plat_arm_interconnect_exit_coherency(void)
{
	cci_disable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
}