plat/xilinx/versal/plat_psci.c - filogic/atf - Gitiles

 /*
  * Copyright (c) 2018-2021, Arm Limited and Contributors. All rights reserved.
  * Copyright (c) 2022-2024, Advanced Micro Devices, Inc. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */

 #include <assert.h>

 #include <common/debug.h>
 #include <lib/mmio.h>
 #include <lib/psci/psci.h>
 #include <plat/arm/common/plat_arm.h>
 #include <plat/common/platform.h>
 #include <plat_arm.h>

 #include "drivers/delay_timer.h"
 #include <plat_private.h>
 #include "pm_api_sys.h"
 #include "pm_client.h"
 #include <pm_common.h>
 #include "pm_ipi.h"
 #include "pm_svc_main.h"

 static uintptr_t versal_sec_entry;

 static int32_t versal_pwr_domain_on(u_register_t mpidr)
 {
 	int32_t cpu_id = plat_core_pos_by_mpidr(mpidr);
 	const struct pm_proc *proc;

 	VERBOSE("%s: mpidr: 0x%lx\n", __func__, mpidr);

 	if (cpu_id == -1) {
 		return PSCI_E_INTERN_FAIL;
 	}

 	proc = pm_get_proc((uint32_t)cpu_id);
 	if (proc == NULL) {
 		return PSCI_E_INTERN_FAIL;
 	}

 	/* Send request to PMC to wake up selected ACPU core */
 	(void)pm_req_wakeup(proc->node_id, (versal_sec_entry & 0xFFFFFFFFU) | 0x1U,
 			    versal_sec_entry >> 32, 0, SECURE_FLAG);

 	/* Clear power down request */
 	pm_client_wakeup(proc);

 	return PSCI_E_SUCCESS;
 }

 /**
  * versal_pwr_domain_suspend() - This function sends request to PMC to suspend
  *                               core.
  * @target_state: Targated state.
  *
  */
 static void versal_pwr_domain_suspend(const psci_power_state_t *target_state)
 {
 	uint32_t state;
 	uint32_t cpu_id = plat_my_core_pos();
 	const struct pm_proc *proc = pm_get_proc(cpu_id);

 	if (proc == NULL) {
 		return;
 	}

 	for (size_t i = 0U; i <= PLAT_MAX_PWR_LVL; i++) {
 		VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
 			__func__, i, target_state->pwr_domain_state[i]);
 	}

 	plat_versal_gic_cpuif_disable();

 	if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
 		plat_versal_gic_save();
 	}

 	state = (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) ?
 		PM_STATE_SUSPEND_TO_RAM : PM_STATE_CPU_IDLE;

 	/* Send request to PMC to suspend this core */
 	(void)pm_self_suspend(proc->node_id, MAX_LATENCY, state, versal_sec_entry,
 			      SECURE_FLAG);

 	/* APU is to be turned off */
 	if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
 		/* disable coherency */
 		plat_arm_interconnect_exit_coherency();
 	}
 }

 /**
  * versal_pwr_domain_suspend_finish() - This function performs actions to finish
  *                                      suspend procedure.
  * @target_state: Targated state.
  *
  */
 static void versal_pwr_domain_suspend_finish(
 					const psci_power_state_t *target_state)
 {
 	uint32_t cpu_id = plat_my_core_pos();
 	const struct pm_proc *proc = pm_get_proc(cpu_id);

 	if (proc == NULL) {
 		return;
 	}

 	for (size_t i = 0U; i <= PLAT_MAX_PWR_LVL; i++) {
 		VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
 			__func__, i, target_state->pwr_domain_state[i]);
 	}

 	/* Clear the APU power control register for this cpu */
 	pm_client_wakeup(proc);

 	/* enable coherency */
 	plat_arm_interconnect_enter_coherency();

 	/* APU was turned off, so restore GIC context */
 	if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
 		plat_versal_gic_resume();
 	}

 	plat_versal_gic_cpuif_enable();
 }

 static void versal_pwr_domain_on_finish(const psci_power_state_t *target_state)
 {
 	/* Enable the gic cpu interface */
 	plat_versal_gic_pcpu_init();

 	/* Program the gic per-cpu distributor or re-distributor interface */
 	plat_versal_gic_cpuif_enable();
 }

 /**
  * versal_system_off() - This function sends the system off request to firmware.
  *                       This function does not return.
  *
  */
 static void __dead2 versal_system_off(void)
 {
 	/* Send the power down request to the PMC */
 	(void)pm_system_shutdown(XPM_SHUTDOWN_TYPE_SHUTDOWN,
 				 pm_get_shutdown_scope(), SECURE_FLAG);

 	while (true) {
 		wfi();
 	}
 }

 /**
  * versal_system_reset() - This function sends the reset request to firmware
  *                         for the system to reset.  This function does not
  *			   return.
  *
  */
 static void __dead2 versal_system_reset(void)
 {
 	uint32_t ret, timeout = 10000U;

 	request_cpu_pwrdwn();

 	/*
 	 * Send the system reset request to the firmware if power down request
 	 * is not received from firmware.
 	 */
 	if (!pwrdwn_req_received) {
 		(void)pm_system_shutdown(XPM_SHUTDOWN_TYPE_RESET,
 					 pm_get_shutdown_scope(), SECURE_FLAG);

 		/*
 		 * Wait for system shutdown request completed and idle callback
 		 * not received.
 		 */
 		do {
 			ret = ipi_mb_enquire_status(primary_proc->ipi->local_ipi_id,
 						    primary_proc->ipi->remote_ipi_id);
 			udelay(100);
 			timeout--;
 		} while ((ret != IPI_MB_STATUS_RECV_PENDING) && (timeout > 0U));
 	}

 	(void)psci_cpu_off();

 	while (true) {
 		wfi();
 	}
 }

 /**
  * versal_pwr_domain_off() - This function performs actions to turn off core.
  * @target_state: Targated state.
  *
  */
 static void versal_pwr_domain_off(const psci_power_state_t *target_state)
 {
 	uint32_t ret, fw_api_version, version_type[RET_PAYLOAD_ARG_CNT] = {0U};
 	uint32_t cpu_id = plat_my_core_pos();
 	const struct pm_proc *proc = pm_get_proc(cpu_id);

 	if (proc == NULL) {
 		return;
 	}

 	for (size_t i = 0U; i <= PLAT_MAX_PWR_LVL; i++) {
 		VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
 			__func__, i, target_state->pwr_domain_state[i]);
 	}

 	/* Prevent interrupts from spuriously waking up this cpu */
 	plat_versal_gic_cpuif_disable();

 	/*
 	 * Send request to PMC to power down the appropriate APU CPU
 	 * core.
 	 * According to PSCI specification, CPU_off function does not
 	 * have resume address and CPU core can only be woken up
 	 * invoking CPU_on function, during which resume address will
 	 * be set.
 	 */
 	ret = pm_feature_check((uint32_t)PM_SELF_SUSPEND, &version_type[0], SECURE_FLAG);
 	if (ret == PM_RET_SUCCESS) {
 		fw_api_version = version_type[0] & 0xFFFFU;
 		if (fw_api_version >= 3U) {
 			(void)pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_OFF, 0,
 					      SECURE_FLAG);
 		} else {
 			(void)pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0,
 					      SECURE_FLAG);
 		}
 	}
 }

 /**
  * versal_validate_power_state() - This function ensures that the power state
  *                                 parameter in request is valid.
  * @power_state: Power state of core.
  * @req_state: Requested state.
  *
  * Return: Returns status, either success or reason.
  *
  */
 static int32_t versal_validate_power_state(uint32_t power_state,
 				       psci_power_state_t *req_state)
 {
 	VERBOSE("%s: power_state: 0x%x\n", __func__, power_state);

 	uint32_t pstate = psci_get_pstate_type(power_state);

 	assert(req_state != NULL);

 	/* Sanity check the requested state */
 	if (pstate == PSTATE_TYPE_STANDBY) {
 		req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_RET_STATE;
 	} else {
 		req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_OFF_STATE;
 	}

 	/* We expect the 'state id' to be zero */
 	if (psci_get_pstate_id(power_state) != 0U) {
 		return PSCI_E_INVALID_PARAMS;
 	}

 	return PSCI_E_SUCCESS;
 }

 /**
  * versal_get_sys_suspend_power_state() - Get power state for system suspend.
  * @req_state: Requested state.
  *
  */
 static void versal_get_sys_suspend_power_state(psci_power_state_t *req_state)
 {
 	req_state->pwr_domain_state[PSCI_CPU_PWR_LVL] = PLAT_MAX_OFF_STATE;
 	req_state->pwr_domain_state[1] = PLAT_MAX_OFF_STATE;
 }

 static const struct plat_psci_ops versal_nopmc_psci_ops = {
 	.pwr_domain_on			= versal_pwr_domain_on,
 	.pwr_domain_off			= versal_pwr_domain_off,
 	.pwr_domain_on_finish		= versal_pwr_domain_on_finish,
 	.pwr_domain_suspend		= versal_pwr_domain_suspend,
 	.pwr_domain_suspend_finish	= versal_pwr_domain_suspend_finish,
 	.system_off			= versal_system_off,
 	.system_reset			= versal_system_reset,
 	.validate_power_state		= versal_validate_power_state,
 	.get_sys_suspend_power_state	= versal_get_sys_suspend_power_state,
 };

 /*******************************************************************************
  * Export the platform specific power ops.
  ******************************************************************************/
 int32_t plat_setup_psci_ops(uintptr_t sec_entrypoint,
 			const struct plat_psci_ops **psci_ops)
 {
 	versal_sec_entry = sec_entrypoint;

 	*psci_ops = &versal_nopmc_psci_ops;

 	return 0;
 }
	/*
	* Copyright (c) 2018-2021, Arm Limited and Contributors. All rights reserved.
	* Copyright (c) 2022-2024, Advanced Micro Devices, Inc. All rights reserved.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	*/

	#include <assert.h>

	#include <common/debug.h>
	#include <lib/mmio.h>
	#include <lib/psci/psci.h>
	#include <plat/arm/common/plat_arm.h>
	#include <plat/common/platform.h>
	#include <plat_arm.h>

	#include "drivers/delay_timer.h"
	#include <plat_private.h>
	#include "pm_api_sys.h"
	#include "pm_client.h"
	#include <pm_common.h>
	#include "pm_ipi.h"
	#include "pm_svc_main.h"

	static uintptr_t versal_sec_entry;

	static int32_t versal_pwr_domain_on(u_register_t mpidr)
	{
	int32_t cpu_id = plat_core_pos_by_mpidr(mpidr);
	const struct pm_proc *proc;

	VERBOSE("%s: mpidr: 0x%lx\n", __func__, mpidr);

	if (cpu_id == -1) {
	return PSCI_E_INTERN_FAIL;
	}

	proc = pm_get_proc((uint32_t)cpu_id);
	if (proc == NULL) {
	return PSCI_E_INTERN_FAIL;
	}

	/* Send request to PMC to wake up selected ACPU core */
	(void)pm_req_wakeup(proc->node_id, (versal_sec_entry & 0xFFFFFFFFU) \| 0x1U,
	versal_sec_entry >> 32, 0, SECURE_FLAG);

	/* Clear power down request */
	pm_client_wakeup(proc);

	return PSCI_E_SUCCESS;
	}

	/**
	* versal_pwr_domain_suspend() - This function sends request to PMC to suspend
	* core.
	* @target_state: Targated state.
	*
	*/
	static void versal_pwr_domain_suspend(const psci_power_state_t *target_state)
	{
	uint32_t state;
	uint32_t cpu_id = plat_my_core_pos();
	const struct pm_proc *proc = pm_get_proc(cpu_id);

	if (proc == NULL) {
	return;
	}

	for (size_t i = 0U; i <= PLAT_MAX_PWR_LVL; i++) {
	VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
	__func__, i, target_state->pwr_domain_state[i]);
	}

	plat_versal_gic_cpuif_disable();

	if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
	plat_versal_gic_save();
	}

	state = (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) ?
	PM_STATE_SUSPEND_TO_RAM : PM_STATE_CPU_IDLE;

	/* Send request to PMC to suspend this core */
	(void)pm_self_suspend(proc->node_id, MAX_LATENCY, state, versal_sec_entry,
	SECURE_FLAG);

	/* APU is to be turned off */
	if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
	/* disable coherency */
	plat_arm_interconnect_exit_coherency();
	}
	}

	/**
	* versal_pwr_domain_suspend_finish() - This function performs actions to finish
	* suspend procedure.
	* @target_state: Targated state.
	*
	*/
	static void versal_pwr_domain_suspend_finish(
	const psci_power_state_t *target_state)
	{
	uint32_t cpu_id = plat_my_core_pos();
	const struct pm_proc *proc = pm_get_proc(cpu_id);

	if (proc == NULL) {
	return;
	}

	for (size_t i = 0U; i <= PLAT_MAX_PWR_LVL; i++) {
	VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
	__func__, i, target_state->pwr_domain_state[i]);
	}

	/* Clear the APU power control register for this cpu */
	pm_client_wakeup(proc);

	/* enable coherency */
	plat_arm_interconnect_enter_coherency();

	/* APU was turned off, so restore GIC context */
	if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
	plat_versal_gic_resume();
	}

	plat_versal_gic_cpuif_enable();
	}

	static void versal_pwr_domain_on_finish(const psci_power_state_t *target_state)
	{
	/* Enable the gic cpu interface */
	plat_versal_gic_pcpu_init();

	/* Program the gic per-cpu distributor or re-distributor interface */
	plat_versal_gic_cpuif_enable();
	}

	/**
	* versal_system_off() - This function sends the system off request to firmware.
	* This function does not return.
	*
	*/
	static void __dead2 versal_system_off(void)
	{
	/* Send the power down request to the PMC */
	(void)pm_system_shutdown(XPM_SHUTDOWN_TYPE_SHUTDOWN,
	pm_get_shutdown_scope(), SECURE_FLAG);

	while (true) {
	wfi();
	}
	}

	/**
	* versal_system_reset() - This function sends the reset request to firmware
	* for the system to reset. This function does not
	* return.
	*
	*/
	static void __dead2 versal_system_reset(void)
	{
	uint32_t ret, timeout = 10000U;

	request_cpu_pwrdwn();

	/*
	* Send the system reset request to the firmware if power down request
	* is not received from firmware.
	*/
	if (!pwrdwn_req_received) {
	(void)pm_system_shutdown(XPM_SHUTDOWN_TYPE_RESET,
	pm_get_shutdown_scope(), SECURE_FLAG);

	/*
	* Wait for system shutdown request completed and idle callback
	* not received.
	*/
	do {
	ret = ipi_mb_enquire_status(primary_proc->ipi->local_ipi_id,
	primary_proc->ipi->remote_ipi_id);
	udelay(100);
	timeout--;
	} while ((ret != IPI_MB_STATUS_RECV_PENDING) && (timeout > 0U));
	}

	(void)psci_cpu_off();

	while (true) {
	wfi();
	}
	}

	/**
	* versal_pwr_domain_off() - This function performs actions to turn off core.
	* @target_state: Targated state.
	*
	*/
	static void versal_pwr_domain_off(const psci_power_state_t *target_state)
	{
	uint32_t ret, fw_api_version, version_type[RET_PAYLOAD_ARG_CNT] = {0U};
	uint32_t cpu_id = plat_my_core_pos();
	const struct pm_proc *proc = pm_get_proc(cpu_id);

	if (proc == NULL) {
	return;
	}

	for (size_t i = 0U; i <= PLAT_MAX_PWR_LVL; i++) {
	VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
	__func__, i, target_state->pwr_domain_state[i]);
	}

	/* Prevent interrupts from spuriously waking up this cpu */
	plat_versal_gic_cpuif_disable();

	/*
	* Send request to PMC to power down the appropriate APU CPU
	* core.
	* According to PSCI specification, CPU_off function does not
	* have resume address and CPU core can only be woken up
	* invoking CPU_on function, during which resume address will
	* be set.
	*/
	ret = pm_feature_check((uint32_t)PM_SELF_SUSPEND, &version_type[0], SECURE_FLAG);
	if (ret == PM_RET_SUCCESS) {
	fw_api_version = version_type[0] & 0xFFFFU;
	if (fw_api_version >= 3U) {
	(void)pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_OFF, 0,
	SECURE_FLAG);
	} else {
	(void)pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0,
	SECURE_FLAG);
	}
	}
	}

	/**
	* versal_validate_power_state() - This function ensures that the power state
	* parameter in request is valid.
	* @power_state: Power state of core.
	* @req_state: Requested state.
	*
	* Return: Returns status, either success or reason.
	*
	*/
	static int32_t versal_validate_power_state(uint32_t power_state,
	psci_power_state_t *req_state)
	{
	VERBOSE("%s: power_state: 0x%x\n", __func__, power_state);

	uint32_t pstate = psci_get_pstate_type(power_state);

	assert(req_state != NULL);

	/* Sanity check the requested state */
	if (pstate == PSTATE_TYPE_STANDBY) {
	req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_RET_STATE;
	} else {
	req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_OFF_STATE;
	}

	/* We expect the 'state id' to be zero */
	if (psci_get_pstate_id(power_state) != 0U) {
	return PSCI_E_INVALID_PARAMS;
	}

	return PSCI_E_SUCCESS;
	}

	/**
	* versal_get_sys_suspend_power_state() - Get power state for system suspend.
	* @req_state: Requested state.
	*
	*/
	static void versal_get_sys_suspend_power_state(psci_power_state_t *req_state)
	{
	req_state->pwr_domain_state[PSCI_CPU_PWR_LVL] = PLAT_MAX_OFF_STATE;
	req_state->pwr_domain_state[1] = PLAT_MAX_OFF_STATE;
	}

	static const struct plat_psci_ops versal_nopmc_psci_ops = {
	.pwr_domain_on = versal_pwr_domain_on,
	.pwr_domain_off = versal_pwr_domain_off,
	.pwr_domain_on_finish = versal_pwr_domain_on_finish,
	.pwr_domain_suspend = versal_pwr_domain_suspend,
	.pwr_domain_suspend_finish = versal_pwr_domain_suspend_finish,
	.system_off = versal_system_off,
	.system_reset = versal_system_reset,
	.validate_power_state = versal_validate_power_state,
	.get_sys_suspend_power_state = versal_get_sys_suspend_power_state,
	};

	/*******************************************************************************
	* Export the platform specific power ops.
	******************************************************************************/
	int32_t plat_setup_psci_ops(uintptr_t sec_entrypoint,
	const struct plat_psci_ops **psci_ops)
	{
	versal_sec_entry = sec_entrypoint;

	*psci_ops = &versal_nopmc_psci_ops;

	return 0;
	}