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240 lines
6.5 KiB
240 lines
6.5 KiB
/*
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* Copyright (c) 2018-2020, 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 <assert.h>
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#include <plat_arm.h>
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#include <plat_private.h>
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#include <pm_common.h>
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#include <common/debug.h>
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#include <lib/mmio.h>
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#include <lib/psci/psci.h>
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#include <plat/common/platform.h>
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#include <plat/arm/common/plat_arm.h>
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#include "pm_api_sys.h"
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#include "pm_client.h"
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static uintptr_t versal_sec_entry;
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static int versal_pwr_domain_on(u_register_t mpidr)
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{
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unsigned int cpu_id = plat_core_pos_by_mpidr(mpidr);
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const struct pm_proc *proc;
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VERBOSE("%s: mpidr: 0x%lx\n", __func__, mpidr);
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if (cpu_id == -1)
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return PSCI_E_INTERN_FAIL;
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proc = pm_get_proc(cpu_id);
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/* Send request to PMC to wake up selected ACPU core */
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pm_req_wakeup(proc->node_id, (versal_sec_entry & 0xFFFFFFFF) | 0x1,
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versal_sec_entry >> 32, 0);
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/* Clear power down request */
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pm_client_wakeup(proc);
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return PSCI_E_SUCCESS;
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}
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/**
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* versal_pwr_domain_suspend() - This function sends request to PMC to suspend
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* core.
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*
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* @target_state Targated state
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*/
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static void versal_pwr_domain_suspend(const psci_power_state_t *target_state)
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{
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unsigned int state;
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unsigned int cpu_id = plat_my_core_pos();
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const struct pm_proc *proc = pm_get_proc(cpu_id);
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for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++)
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VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
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__func__, i, target_state->pwr_domain_state[i]);
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plat_versal_gic_cpuif_disable();
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if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
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plat_versal_gic_save();
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}
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state = target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE ?
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PM_STATE_SUSPEND_TO_RAM : PM_STATE_CPU_IDLE;
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/* Send request to PMC to suspend this core */
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pm_self_suspend(proc->node_id, MAX_LATENCY, state, versal_sec_entry);
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/* APU is to be turned off */
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if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
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/* disable coherency */
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plat_arm_interconnect_exit_coherency();
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}
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}
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/**
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* versal_pwr_domain_suspend_finish() - This function performs actions to finish
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* suspend procedure.
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*
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* @target_state Targated state
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*/
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static void versal_pwr_domain_suspend_finish(
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const psci_power_state_t *target_state)
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{
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unsigned int cpu_id = plat_my_core_pos();
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const struct pm_proc *proc = pm_get_proc(cpu_id);
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for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++)
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VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
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__func__, i, target_state->pwr_domain_state[i]);
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/* Clear the APU power control register for this cpu */
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pm_client_wakeup(proc);
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/* enable coherency */
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plat_arm_interconnect_enter_coherency();
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/* APU was turned off, so restore GIC context */
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if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
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plat_versal_gic_resume();
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}
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plat_versal_gic_cpuif_enable();
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}
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void versal_pwr_domain_on_finish(const psci_power_state_t *target_state)
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{
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/* Enable the gic cpu interface */
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plat_versal_gic_pcpu_init();
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/* Program the gic per-cpu distributor or re-distributor interface */
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plat_versal_gic_cpuif_enable();
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}
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/**
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* versal_system_off() - This function sends the system off request
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* to firmware. This function does not return.
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*/
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static void __dead2 versal_system_off(void)
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{
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/* Send the power down request to the PMC */
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pm_system_shutdown(XPM_SHUTDOWN_TYPE_SHUTDOWN,
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pm_get_shutdown_scope());
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while (1)
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wfi();
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}
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/**
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* versal_system_reset() - This function sends the reset request
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* to firmware for the system to reset. This function does not return.
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*/
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static void __dead2 versal_system_reset(void)
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{
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/* Send the system reset request to the PMC */
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pm_system_shutdown(XPM_SHUTDOWN_TYPE_RESET,
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pm_get_shutdown_scope());
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while (1)
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wfi();
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}
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/**
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* versal_pwr_domain_off() - This function performs actions to turn off core
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*
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* @target_state Targated state
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*/
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static void versal_pwr_domain_off(const psci_power_state_t *target_state)
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{
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unsigned int cpu_id = plat_my_core_pos();
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const struct pm_proc *proc = pm_get_proc(cpu_id);
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for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++)
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VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
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__func__, i, target_state->pwr_domain_state[i]);
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/* Prevent interrupts from spuriously waking up this cpu */
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plat_versal_gic_cpuif_disable();
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/*
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* Send request to PMC to power down the appropriate APU CPU
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* core.
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* According to PSCI specification, CPU_off function does not
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* have resume address and CPU core can only be woken up
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* invoking CPU_on function, during which resume address will
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* be set.
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*/
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pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0);
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}
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/**
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* versal_validate_power_state() - This function ensures that the power state
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* parameter in request is valid.
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*
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* @power_state Power state of core
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* @req_state Requested state
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*
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* @return Returns status, either success or reason
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*/
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static int versal_validate_power_state(unsigned int power_state,
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psci_power_state_t *req_state)
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{
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VERBOSE("%s: power_state: 0x%x\n", __func__, power_state);
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int pstate = psci_get_pstate_type(power_state);
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assert(req_state);
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/* Sanity check the requested state */
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if (pstate == PSTATE_TYPE_STANDBY)
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req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_RET_STATE;
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else
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req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_OFF_STATE;
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/* We expect the 'state id' to be zero */
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if (psci_get_pstate_id(power_state))
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return PSCI_E_INVALID_PARAMS;
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return PSCI_E_SUCCESS;
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}
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/**
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* versal_get_sys_suspend_power_state() - Get power state for system suspend
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*
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* @req_state Requested state
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*/
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static void versal_get_sys_suspend_power_state(psci_power_state_t *req_state)
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{
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req_state->pwr_domain_state[PSCI_CPU_PWR_LVL] = PLAT_MAX_OFF_STATE;
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req_state->pwr_domain_state[1] = PLAT_MAX_OFF_STATE;
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}
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static const struct plat_psci_ops versal_nopmc_psci_ops = {
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.pwr_domain_on = versal_pwr_domain_on,
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.pwr_domain_off = versal_pwr_domain_off,
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.pwr_domain_on_finish = versal_pwr_domain_on_finish,
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.pwr_domain_suspend = versal_pwr_domain_suspend,
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.pwr_domain_suspend_finish = versal_pwr_domain_suspend_finish,
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.system_off = versal_system_off,
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.system_reset = versal_system_reset,
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.validate_power_state = versal_validate_power_state,
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.get_sys_suspend_power_state = versal_get_sys_suspend_power_state,
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};
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/*******************************************************************************
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* Export the platform specific power ops.
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******************************************************************************/
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int plat_setup_psci_ops(uintptr_t sec_entrypoint,
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const struct plat_psci_ops **psci_ops)
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{
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versal_sec_entry = sec_entrypoint;
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*psci_ops = &versal_nopmc_psci_ops;
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return 0;
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}
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