blob: 636b719fd8f30987c53496bf8ec318215a0141b7 [file] [log] [blame]
/*
* Copyright (c) 2019, Xilinx, Inc. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/*
* APU specific definition of processors in the subsystem as well as functions
* for getting information about and changing state of the APU.
*/
#include <plat_ipi.h>
#include <platform_def.h>
#include <versal_def.h>
#include <lib/bakery_lock.h>
#include <lib/mmio.h>
#include <drivers/arm/gicv3.h>
#include <plat/common/platform.h>
#include "pm_client.h"
DEFINE_BAKERY_LOCK(pm_client_secure_lock);
static const struct pm_ipi apu_ipi = {
.local_ipi_id = IPI_ID_APU,
.remote_ipi_id = IPI_ID_PMC,
.buffer_base = IPI_BUFFER_APU_BASE,
};
/* Order in pm_procs_all array must match cpu ids */
static const struct pm_proc pm_procs_all[] = {
{
.node_id = XPM_DEVID_ACPU_0,
.ipi = &apu_ipi,
.pwrdn_mask = APU_0_PWRCTL_CPUPWRDWNREQ_MASK,
},
{
.node_id = XPM_DEVID_ACPU_1,
.ipi = &apu_ipi,
.pwrdn_mask = APU_1_PWRCTL_CPUPWRDWNREQ_MASK,
}
};
const struct pm_proc *primary_proc = &pm_procs_all[0];
/**
* pm_client_suspend() - Client-specific suspend actions
*
* This function should contain any PU-specific actions
* required prior to sending suspend request to PMU
* Actions taken depend on the state system is suspending to.
*/
void pm_client_suspend(const struct pm_proc *proc, unsigned int state)
{
bakery_lock_get(&pm_client_secure_lock);
/* Set powerdown request */
mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) |
proc->pwrdn_mask);
bakery_lock_release(&pm_client_secure_lock);
}
/**
* pm_client_abort_suspend() - Client-specific abort-suspend actions
*
* This function should contain any PU-specific actions
* required for aborting a prior suspend request
*/
void pm_client_abort_suspend(void)
{
/* Enable interrupts at processor level (for current cpu) */
gicv3_cpuif_enable(plat_my_core_pos());
bakery_lock_get(&pm_client_secure_lock);
/* Clear powerdown request */
mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) &
~primary_proc->pwrdn_mask);
bakery_lock_release(&pm_client_secure_lock);
}
/**
* pm_get_proc() - returns pointer to the proc structure
* @cpuid: id of the cpu whose proc struct pointer should be returned
*
* Return: pointer to a proc structure if proc is found, otherwise NULL
*/
const struct pm_proc *pm_get_proc(unsigned int cpuid)
{
if (cpuid < ARRAY_SIZE(pm_procs_all))
return &pm_procs_all[cpuid];
return NULL;
}