arm_gicv3_legacy.c

/*
 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of ARM nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <arm_def.h>
#include <arm_gic.h>
#include <plat_arm.h>
#include <platform.h>
#include <platform_def.h>

/******************************************************************************
 * The following function is defined as weak to allow a platform to override
 * the way the Legacy GICv3 driver is initialised and used.
 *****************************************************************************/
#pragma weak plat_arm_gic_driver_init
#pragma weak plat_arm_gic_init
#pragma weak plat_arm_gic_cpuif_enable
#pragma weak plat_arm_gic_cpuif_disable
#pragma weak plat_arm_gic_pcpu_init

/*
 * In the GICv3 Legacy mode, the Group 1 secure interrupts are treated as Group
 * 0 interrupts.
 */
static const unsigned int irq_sec_array[] = {
	PLAT_ARM_G0_IRQS,
	PLAT_ARM_G1S_IRQS
};

void plat_arm_gic_driver_init(void)
{
	arm_gic_init(PLAT_ARM_GICC_BASE,
		     PLAT_ARM_GICD_BASE,
		     PLAT_ARM_GICR_BASE,
		     irq_sec_array,
		     ARRAY_SIZE(irq_sec_array));
}

/******************************************************************************
 * ARM common helper to initialize the GIC.
 *****************************************************************************/
void plat_arm_gic_init(void)
{
	arm_gic_setup();
}

/******************************************************************************
 * ARM common helper to enable the GIC CPU interface
 *****************************************************************************/
void plat_arm_gic_cpuif_enable(void)
{
	arm_gic_cpuif_setup();
}

/******************************************************************************
 * ARM common helper to disable the GIC CPU interface
 *****************************************************************************/
void plat_arm_gic_cpuif_disable(void)
{
	arm_gic_cpuif_deactivate();
}

/******************************************************************************
 * ARM common helper to initialize the per-cpu distributor in GICv2 or
 * redistributor interface in GICv3.
 *****************************************************************************/
void plat_arm_gic_pcpu_init(void)
{
	arm_gic_pcpu_distif_setup();
}

/******************************************************************************
 * Stubs for Redistributor power management. Although legacy configuration isn't
 * supported, these are provided for the sake of uniform GIC API
 *****************************************************************************/
void plat_arm_gic_redistif_on(void)
{
	return;
}

void plat_arm_gic_redistif_off(void)
{
	return;
}