188 lines
6.2 KiB
C
188 lines
6.2 KiB
C
/*
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* Copyright (c) 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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*/
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#include <platform_def.h>
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#include <common/interrupt_props.h>
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#include <drivers/arm/gicv3.h>
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#include <lib/utils.h>
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#include <plat/common/platform.h>
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#include "versal_private.h"
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/******************************************************************************
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* The following functions are defined as weak to allow a platform to override
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* the way the GICv3 driver is initialised and used.
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*****************************************************************************/
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#pragma weak plat_versal_gic_driver_init
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#pragma weak plat_versal_gic_init
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#pragma weak plat_versal_gic_cpuif_enable
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#pragma weak plat_versal_gic_cpuif_disable
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#pragma weak plat_versal_gic_pcpu_init
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#pragma weak plat_versal_gic_redistif_on
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#pragma weak plat_versal_gic_redistif_off
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/* The GICv3 driver only needs to be initialized in EL3 */
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static uintptr_t rdistif_base_addrs[PLATFORM_CORE_COUNT];
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static const interrupt_prop_t versal_interrupt_props[] = {
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PLAT_VERSAL_G1S_IRQ_PROPS(INTR_GROUP1S),
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PLAT_VERSAL_G0_IRQ_PROPS(INTR_GROUP0)
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};
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/*
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* We save and restore the GICv3 context on system suspend. Allocate the
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* data in the designated EL3 Secure carve-out memory.
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*/
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static gicv3_redist_ctx_t rdist_ctx __section("versal_el3_tzc_dram");
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static gicv3_dist_ctx_t dist_ctx __section("versal_el3_tzc_dram");
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/*
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* MPIDR hashing function for translating MPIDRs read from GICR_TYPER register
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* to core position.
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*
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* Calculating core position is dependent on MPIDR_EL1.MT bit. However, affinity
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* values read from GICR_TYPER don't have an MT field. To reuse the same
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* translation used for CPUs, we insert MT bit read from the PE's MPIDR into
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* that read from GICR_TYPER.
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*
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* Assumptions:
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*
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* - All CPUs implemented in the system have MPIDR_EL1.MT bit set;
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* - No CPUs implemented in the system use affinity level 3.
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*/
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static unsigned int versal_gicv3_mpidr_hash(u_register_t mpidr)
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{
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mpidr |= (read_mpidr_el1() & MPIDR_MT_MASK);
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return versal_calc_core_pos(mpidr);
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}
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static const gicv3_driver_data_t versal_gic_data __unused = {
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.gicd_base = PLAT_VERSAL_GICD_BASE,
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.gicr_base = PLAT_VERSAL_GICR_BASE,
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.interrupt_props = versal_interrupt_props,
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.interrupt_props_num = ARRAY_SIZE(versal_interrupt_props),
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.rdistif_num = PLATFORM_CORE_COUNT,
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.rdistif_base_addrs = rdistif_base_addrs,
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.mpidr_to_core_pos = versal_gicv3_mpidr_hash
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};
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void __init plat_versal_gic_driver_init(void)
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{
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/*
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* The GICv3 driver is initialized in EL3 and does not need
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* to be initialized again in SEL1. This is because the S-EL1
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* can use GIC system registers to manage interrupts and does
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* not need GIC interface base addresses to be configured.
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*/
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#if IMAGE_BL31
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gicv3_driver_init(&versal_gic_data);
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#endif
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}
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/******************************************************************************
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* Versal common helper to initialize the GIC. Only invoked by BL31
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*****************************************************************************/
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void __init plat_versal_gic_init(void)
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{
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gicv3_distif_init();
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gicv3_rdistif_init(plat_my_core_pos());
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gicv3_cpuif_enable(plat_my_core_pos());
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}
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/******************************************************************************
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* Versal common helper to enable the GIC CPU interface
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*****************************************************************************/
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void plat_versal_gic_cpuif_enable(void)
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{
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gicv3_cpuif_enable(plat_my_core_pos());
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}
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/******************************************************************************
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* Versal common helper to disable the GIC CPU interface
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*****************************************************************************/
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void plat_versal_gic_cpuif_disable(void)
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{
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gicv3_cpuif_disable(plat_my_core_pos());
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}
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/******************************************************************************
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* Versal common helper to initialize the per-cpu redistributor interface in
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* GICv3
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*****************************************************************************/
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void plat_versal_gic_pcpu_init(void)
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{
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gicv3_rdistif_init(plat_my_core_pos());
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}
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/******************************************************************************
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* Versal common helpers to power GIC redistributor interface
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*****************************************************************************/
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void plat_versal_gic_redistif_on(void)
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{
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gicv3_rdistif_on(plat_my_core_pos());
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}
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void plat_versal_gic_redistif_off(void)
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{
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gicv3_rdistif_off(plat_my_core_pos());
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}
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/******************************************************************************
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* Versal common helper to save & restore the GICv3 on resume from system
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* suspend
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*****************************************************************************/
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void plat_versal_gic_save(void)
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{
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/*
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* If an ITS is available, save its context before
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* the Redistributor using:
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* gicv3_its_save_disable(gits_base, &its_ctx[i])
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* Additionnaly, an implementation-defined sequence may
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* be required to save the whole ITS state.
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*/
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/*
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* Save the GIC Redistributors and ITS contexts before the
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* Distributor context. As we only handle SYSTEM SUSPEND API,
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* we only need to save the context of the CPU that is issuing
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* the SYSTEM SUSPEND call, i.e. the current CPU.
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*/
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gicv3_rdistif_save(plat_my_core_pos(), &rdist_ctx);
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/* Save the GIC Distributor context */
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gicv3_distif_save(&dist_ctx);
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/*
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* From here, all the components of the GIC can be safely powered down
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* as long as there is an alternate way to handle wakeup interrupt
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* sources.
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*/
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}
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void plat_versal_gic_resume(void)
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{
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/* Restore the GIC Distributor context */
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gicv3_distif_init_restore(&dist_ctx);
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/*
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* Restore the GIC Redistributor and ITS contexts after the
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* Distributor context. As we only handle SYSTEM SUSPEND API,
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* we only need to restore the context of the CPU that issued
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* the SYSTEM SUSPEND call.
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*/
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gicv3_rdistif_init_restore(plat_my_core_pos(), &rdist_ctx);
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/*
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* If an ITS is available, restore its context after
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* the Redistributor using:
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* gicv3_its_restore(gits_base, &its_ctx[i])
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* An implementation-defined sequence may be required to
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* restore the whole ITS state. The ITS must also be
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* re-enabled after this sequence has been executed.
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*/
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}
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