96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/*
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* Copyright (c) 2019, Xilinx, Inc. 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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/*
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* APU specific definition of processors in the subsystem as well as functions
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* for getting information about and changing state of the APU.
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*/
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#include <plat_ipi.h>
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#include <platform_def.h>
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#include <versal_def.h>
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#include <lib/bakery_lock.h>
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#include <lib/mmio.h>
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#include <drivers/arm/gicv3.h>
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#include <plat/common/platform.h>
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#include "pm_client.h"
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DEFINE_BAKERY_LOCK(pm_client_secure_lock);
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static const struct pm_ipi apu_ipi = {
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.local_ipi_id = IPI_ID_APU,
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.remote_ipi_id = IPI_ID_PMC,
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.buffer_base = IPI_BUFFER_APU_BASE,
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};
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/* Order in pm_procs_all array must match cpu ids */
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static const struct pm_proc pm_procs_all[] = {
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{
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.node_id = XPM_DEVID_ACPU_0,
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.ipi = &apu_ipi,
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.pwrdn_mask = APU_0_PWRCTL_CPUPWRDWNREQ_MASK,
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},
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{
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.node_id = XPM_DEVID_ACPU_1,
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.ipi = &apu_ipi,
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.pwrdn_mask = APU_1_PWRCTL_CPUPWRDWNREQ_MASK,
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}
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};
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const struct pm_proc *primary_proc = &pm_procs_all[0];
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/**
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* pm_client_suspend() - Client-specific suspend actions
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*
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* This function should contain any PU-specific actions
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* required prior to sending suspend request to PMU
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* Actions taken depend on the state system is suspending to.
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*/
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void pm_client_suspend(const struct pm_proc *proc, unsigned int state)
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{
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bakery_lock_get(&pm_client_secure_lock);
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/* Set powerdown request */
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mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) |
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proc->pwrdn_mask);
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bakery_lock_release(&pm_client_secure_lock);
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}
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/**
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* pm_client_abort_suspend() - Client-specific abort-suspend actions
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*
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* This function should contain any PU-specific actions
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* required for aborting a prior suspend request
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*/
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void pm_client_abort_suspend(void)
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{
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/* Enable interrupts at processor level (for current cpu) */
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gicv3_cpuif_enable(plat_my_core_pos());
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bakery_lock_get(&pm_client_secure_lock);
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/* Clear powerdown request */
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mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) &
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~primary_proc->pwrdn_mask);
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bakery_lock_release(&pm_client_secure_lock);
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}
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/**
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* pm_get_proc() - returns pointer to the proc structure
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* @cpuid: id of the cpu whose proc struct pointer should be returned
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*
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* Return: pointer to a proc structure if proc is found, otherwise NULL
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*/
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const struct pm_proc *pm_get_proc(unsigned int cpuid)
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{
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if (cpuid < ARRAY_SIZE(pm_procs_all))
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return &pm_procs_all[cpuid];
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return NULL;
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}
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