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

 /*
  * Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * Redistributions of source code must retain the above copyright notice, this
  * list of conditions and the following disclaimer.
  *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
  *
  * Neither the name of ARM nor the names of its contributors may be used
  * to endorse or promote products derived from this software without specific
  * prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */

 #include <arch_helpers.h>
 #include <errno.h>
 #include <assert.h>
 #include <debug.h>
 #include <gicv2.h>
 #include <mmio.h>
 #include <plat_arm.h>
 #include <platform.h>
 #include <psci.h>
 #include "pm_api_sys.h"
 #include "pm_client.h"
 #include "zynqmp_private.h"

 uintptr_t zynqmp_sec_entry;

 void zynqmp_cpu_standby(plat_local_state_t cpu_state)
 {
 	VERBOSE("%s: cpu_state: 0x%x\n", __func__, cpu_state);

 	dsb();
 	wfi();
 }

 static int zynqmp_nopmu_pwr_domain_on(u_register_t mpidr)
 {
 	uint32_t r;
 	unsigned int cpu_id = plat_core_pos_by_mpidr(mpidr);

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

 	if (cpu_id == -1)
 		return PSCI_E_INTERN_FAIL;

 	/* program RVBAR */
 	mmio_write_32(APU_RVBAR_L_0 + (cpu_id << 3), zynqmp_sec_entry);
 	mmio_write_32(APU_RVBAR_H_0 + (cpu_id << 3), zynqmp_sec_entry >> 32);

 	/* clear VINITHI */
 	r = mmio_read_32(APU_CONFIG_0);
 	r &= ~(1 << APU_CONFIG_0_VINITHI_SHIFT << cpu_id);
 	mmio_write_32(APU_CONFIG_0, r);

 	/* clear power down request */
 	r = mmio_read_32(APU_PWRCTL);
 	r &= ~(1 << cpu_id);
 	mmio_write_32(APU_PWRCTL, r);

 	/* power up island */
 	mmio_write_32(PMU_GLOBAL_REQ_PWRUP_EN, 1 << cpu_id);
 	mmio_write_32(PMU_GLOBAL_REQ_PWRUP_TRIG, 1 << cpu_id);
 	/* FIXME: we should have a way to break out */
 	while (mmio_read_32(PMU_GLOBAL_REQ_PWRUP_STATUS) & (1 << cpu_id))
 		;

 	/* release core reset */
 	r = mmio_read_32(CRF_APB_RST_FPD_APU);
 	r &= ~((CRF_APB_RST_FPD_APU_ACPU_PWRON_RESET |
 			CRF_APB_RST_FPD_APU_ACPU_RESET) << cpu_id);
 	mmio_write_32(CRF_APB_RST_FPD_APU, r);

 	return PSCI_E_SUCCESS;
 }

 static int zynqmp_pwr_domain_on(u_register_t mpidr)
 {
 	unsigned int 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(cpu_id);

 	/* Send request to PMU to wake up selected APU CPU core */
 	pm_req_wakeup(proc->node_id, 1, zynqmp_sec_entry, REQ_ACK_BLOCKING);

 	return PSCI_E_SUCCESS;
 }

 static void zynqmp_nopmu_pwr_domain_off(const psci_power_state_t *target_state)
 {
 	uint32_t r;
 	unsigned int cpu_id = plat_my_core_pos();

 	for (size_t i = 0; 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 */
 	gicv2_cpuif_disable();

 	/* set power down request */
 	r = mmio_read_32(APU_PWRCTL);
 	r |= (1 << cpu_id);
 	mmio_write_32(APU_PWRCTL, r);
 }

 static void zynqmp_pwr_domain_off(const psci_power_state_t *target_state)
 {
 	unsigned int cpu_id = plat_my_core_pos();
 	const struct pm_proc *proc = pm_get_proc(cpu_id);

 	for (size_t i = 0; 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 */
 	gicv2_cpuif_disable();

 	/*
 	 * Send request to PMU 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.
 	 */
 	pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0);
 }

 static void zynqmp_nopmu_pwr_domain_suspend(const psci_power_state_t *target_state)
 {
 	uint32_t r;
 	unsigned int cpu_id = plat_my_core_pos();

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

 	/* set power down request */
 	r = mmio_read_32(APU_PWRCTL);
 	r |= (1 << cpu_id);
 	mmio_write_32(APU_PWRCTL, r);

 	/* program RVBAR */
 	mmio_write_32(APU_RVBAR_L_0 + (cpu_id << 3), zynqmp_sec_entry);
 	mmio_write_32(APU_RVBAR_H_0 + (cpu_id << 3), zynqmp_sec_entry >> 32);

 	/* clear VINITHI */
 	r = mmio_read_32(APU_CONFIG_0);
 	r &= ~(1 << APU_CONFIG_0_VINITHI_SHIFT << cpu_id);
 	mmio_write_32(APU_CONFIG_0, r);

 	/* enable power up on IRQ */
 	mmio_write_32(PMU_GLOBAL_REQ_PWRUP_EN, 1 << cpu_id);
 }

 static void zynqmp_pwr_domain_suspend(const psci_power_state_t *target_state)
 {
 	unsigned int state;
 	unsigned int cpu_id = plat_my_core_pos();
 	const struct pm_proc *proc = pm_get_proc(cpu_id);

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

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

 	/* Send request to PMU to suspend this core */
 	pm_self_suspend(proc->node_id, MAX_LATENCY, state, zynqmp_sec_entry);

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

 static void zynqmp_pwr_domain_on_finish(const psci_power_state_t *target_state)
 {
 	for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++)
 		VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
 			__func__, i, target_state->pwr_domain_state[i]);

 	gicv2_cpuif_enable();
 	gicv2_pcpu_distif_init();
 }

 static void zynqmp_nopmu_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
 {
 	uint32_t r;
 	unsigned int cpu_id = plat_my_core_pos();

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

 	/* disable power up on IRQ */
 	mmio_write_32(PMU_GLOBAL_REQ_PWRUP_DIS, 1 << cpu_id);

 	/* clear powerdown bit */
 	r = mmio_read_32(APU_PWRCTL);
 	r &= ~(1 << cpu_id);
 	mmio_write_32(APU_PWRCTL, r);
 }

 static void zynqmp_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
 {
 	unsigned int cpu_id = plat_my_core_pos();
 	const struct pm_proc *proc = pm_get_proc(cpu_id);

 	for (size_t i = 0; 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 */
 	if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
 		plat_arm_gic_init();
 	} else {
 		gicv2_cpuif_enable();
 		gicv2_pcpu_distif_init();
 	}
 }

 /*******************************************************************************
  * ZynqMP handlers to shutdown/reboot the system
  ******************************************************************************/
 static void __dead2 zynqmp_nopmu_system_off(void)
 {
 	ERROR("ZynqMP System Off: operation not handled.\n");

 	/* disable coherency */
 	plat_arm_interconnect_exit_coherency();

 	panic();
 }

 static void __dead2 zynqmp_system_off(void)
 {
 	/* disable coherency */
 	plat_arm_interconnect_exit_coherency();

 	/* Send the power down request to the PMU */
 	pm_system_shutdown(PMF_SHUTDOWN_TYPE_SHUTDOWN,
 			   PMF_SHUTDOWN_SUBTYPE_SUBSYSTEM);

 	while (1)
 		wfi();
 }

 static void __dead2 zynqmp_nopmu_system_reset(void)
 {
 	/*
 	 * This currently triggers a system reset. I.e. the whole
 	 * system will be reset! Including RPUs, PMU, PL, etc.
 	 */

 	/* disable coherency */
 	plat_arm_interconnect_exit_coherency();

 	/* bypass RPLL (needed on 1.0 silicon) */
 	uint32_t reg = mmio_read_32(CRL_APB_RPLL_CTRL);
 	reg |= CRL_APB_RPLL_CTRL_BYPASS;
 	mmio_write_32(CRL_APB_RPLL_CTRL, reg);

 	/* trigger system reset */
 	mmio_write_32(CRL_APB_RESET_CTRL, CRL_APB_RESET_CTRL_SOFT_RESET);

 	while (1)
 		wfi();
 }

 static void __dead2 zynqmp_system_reset(void)
 {
 	/* disable coherency */
 	plat_arm_interconnect_exit_coherency();

 	/* Send the system reset request to the PMU */
 	pm_system_shutdown(PMF_SHUTDOWN_TYPE_RESET,
 			   PMF_SHUTDOWN_SUBTYPE_SUBSYSTEM);

 	while (1)
 		wfi();
 }

 int zynqmp_validate_power_state(unsigned int power_state,
 				psci_power_state_t *req_state)
 {
 	VERBOSE("%s: power_state: 0x%x\n", __func__, power_state);

 	int pstate = psci_get_pstate_type(power_state);

 	assert(req_state);

 	/* 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))
 		return PSCI_E_INVALID_PARAMS;

 	return PSCI_E_SUCCESS;
 }

 int zynqmp_validate_ns_entrypoint(unsigned long ns_entrypoint)
 {
 	VERBOSE("%s: ns_entrypoint: 0x%lx\n", __func__, ns_entrypoint);

 	/* FIXME: Actually validate */
 	return PSCI_E_SUCCESS;
 }

 void zynqmp_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;
 }

 /*******************************************************************************
  * Export the platform handlers to enable psci to invoke them
  ******************************************************************************/
 static const struct plat_psci_ops zynqmp_psci_ops = {
 	.cpu_standby			= zynqmp_cpu_standby,
 	.pwr_domain_on			= zynqmp_pwr_domain_on,
 	.pwr_domain_off			= zynqmp_pwr_domain_off,
 	.pwr_domain_suspend		= zynqmp_pwr_domain_suspend,
 	.pwr_domain_on_finish		= zynqmp_pwr_domain_on_finish,
 	.pwr_domain_suspend_finish	= zynqmp_pwr_domain_suspend_finish,
 	.system_off			= zynqmp_system_off,
 	.system_reset			= zynqmp_system_reset,
 	.validate_power_state		= zynqmp_validate_power_state,
 	.validate_ns_entrypoint		= zynqmp_validate_ns_entrypoint,
 	.get_sys_suspend_power_state	= zynqmp_get_sys_suspend_power_state,
 };

 static const struct plat_psci_ops zynqmp_nopmu_psci_ops = {
 	.cpu_standby			= zynqmp_cpu_standby,
 	.pwr_domain_on			= zynqmp_nopmu_pwr_domain_on,
 	.pwr_domain_off			= zynqmp_nopmu_pwr_domain_off,
 	.pwr_domain_suspend		= zynqmp_nopmu_pwr_domain_suspend,
 	.pwr_domain_on_finish		= zynqmp_pwr_domain_on_finish,
 	.pwr_domain_suspend_finish	= zynqmp_nopmu_pwr_domain_suspend_finish,
 	.system_off			= zynqmp_nopmu_system_off,
 	.system_reset			= zynqmp_nopmu_system_reset,
 	.validate_power_state		= zynqmp_validate_power_state,
 	.validate_ns_entrypoint		= zynqmp_validate_ns_entrypoint,
 	.get_sys_suspend_power_state	= zynqmp_get_sys_suspend_power_state,
 };

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

 	if (zynqmp_is_pmu_up())
 		*psci_ops = &zynqmp_psci_ops;
 	else
 		*psci_ops = &zynqmp_nopmu_psci_ops;

 	return 0;
 }
	/*
	* Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*
	* Redistributions of source code must retain the above copyright notice, this
	* list of conditions and the following disclaimer.
	*
	* Redistributions in binary form must reproduce the above copyright notice,
	* this list of conditions and the following disclaimer in the documentation
	* and/or other materials provided with the distribution.
	*
	* Neither the name of ARM nor the names of its contributors may be used
	* to endorse or promote products derived from this software without specific
	* prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	* POSSIBILITY OF SUCH DAMAGE.
	*/

	#include <arch_helpers.h>
	#include <errno.h>
	#include <assert.h>
	#include <debug.h>
	#include <gicv2.h>
	#include <mmio.h>
	#include <plat_arm.h>
	#include <platform.h>
	#include <psci.h>
	#include "pm_api_sys.h"
	#include "pm_client.h"
	#include "zynqmp_private.h"

	uintptr_t zynqmp_sec_entry;

	void zynqmp_cpu_standby(plat_local_state_t cpu_state)
	{
	VERBOSE("%s: cpu_state: 0x%x\n", __func__, cpu_state);

	dsb();
	wfi();
	}

	static int zynqmp_nopmu_pwr_domain_on(u_register_t mpidr)
	{
	uint32_t r;
	unsigned int cpu_id = plat_core_pos_by_mpidr(mpidr);

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

	if (cpu_id == -1)
	return PSCI_E_INTERN_FAIL;

	/* program RVBAR */
	mmio_write_32(APU_RVBAR_L_0 + (cpu_id << 3), zynqmp_sec_entry);
	mmio_write_32(APU_RVBAR_H_0 + (cpu_id << 3), zynqmp_sec_entry >> 32);

	/* clear VINITHI */
	r = mmio_read_32(APU_CONFIG_0);
	r &= ~(1 << APU_CONFIG_0_VINITHI_SHIFT << cpu_id);
	mmio_write_32(APU_CONFIG_0, r);

	/* clear power down request */
	r = mmio_read_32(APU_PWRCTL);
	r &= ~(1 << cpu_id);
	mmio_write_32(APU_PWRCTL, r);

	/* power up island */
	mmio_write_32(PMU_GLOBAL_REQ_PWRUP_EN, 1 << cpu_id);
	mmio_write_32(PMU_GLOBAL_REQ_PWRUP_TRIG, 1 << cpu_id);
	/* FIXME: we should have a way to break out */
	while (mmio_read_32(PMU_GLOBAL_REQ_PWRUP_STATUS) & (1 << cpu_id))
	;

	/* release core reset */
	r = mmio_read_32(CRF_APB_RST_FPD_APU);
	r &= ~((CRF_APB_RST_FPD_APU_ACPU_PWRON_RESET \|
	CRF_APB_RST_FPD_APU_ACPU_RESET) << cpu_id);
	mmio_write_32(CRF_APB_RST_FPD_APU, r);

	return PSCI_E_SUCCESS;
	}

	static int zynqmp_pwr_domain_on(u_register_t mpidr)
	{
	unsigned int 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(cpu_id);

	/* Send request to PMU to wake up selected APU CPU core */
	pm_req_wakeup(proc->node_id, 1, zynqmp_sec_entry, REQ_ACK_BLOCKING);

	return PSCI_E_SUCCESS;
	}

	static void zynqmp_nopmu_pwr_domain_off(const psci_power_state_t *target_state)
	{
	uint32_t r;
	unsigned int cpu_id = plat_my_core_pos();

	for (size_t i = 0; 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 */
	gicv2_cpuif_disable();

	/* set power down request */
	r = mmio_read_32(APU_PWRCTL);
	r \|= (1 << cpu_id);
	mmio_write_32(APU_PWRCTL, r);
	}

	static void zynqmp_pwr_domain_off(const psci_power_state_t *target_state)
	{
	unsigned int cpu_id = plat_my_core_pos();
	const struct pm_proc *proc = pm_get_proc(cpu_id);

	for (size_t i = 0; 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 */
	gicv2_cpuif_disable();

	/*
	* Send request to PMU 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.
	*/
	pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0);
	}

	static void zynqmp_nopmu_pwr_domain_suspend(const psci_power_state_t *target_state)
	{
	uint32_t r;
	unsigned int cpu_id = plat_my_core_pos();

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

	/* set power down request */
	r = mmio_read_32(APU_PWRCTL);
	r \|= (1 << cpu_id);
	mmio_write_32(APU_PWRCTL, r);

	/* program RVBAR */
	mmio_write_32(APU_RVBAR_L_0 + (cpu_id << 3), zynqmp_sec_entry);
	mmio_write_32(APU_RVBAR_H_0 + (cpu_id << 3), zynqmp_sec_entry >> 32);

	/* clear VINITHI */
	r = mmio_read_32(APU_CONFIG_0);
	r &= ~(1 << APU_CONFIG_0_VINITHI_SHIFT << cpu_id);
	mmio_write_32(APU_CONFIG_0, r);

	/* enable power up on IRQ */
	mmio_write_32(PMU_GLOBAL_REQ_PWRUP_EN, 1 << cpu_id);
	}

	static void zynqmp_pwr_domain_suspend(const psci_power_state_t *target_state)
	{
	unsigned int state;
	unsigned int cpu_id = plat_my_core_pos();
	const struct pm_proc *proc = pm_get_proc(cpu_id);

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

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

	/* Send request to PMU to suspend this core */
	pm_self_suspend(proc->node_id, MAX_LATENCY, state, zynqmp_sec_entry);

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

	static void zynqmp_pwr_domain_on_finish(const psci_power_state_t *target_state)
	{
	for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++)
	VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
	__func__, i, target_state->pwr_domain_state[i]);

	gicv2_cpuif_enable();
	gicv2_pcpu_distif_init();
	}

	static void zynqmp_nopmu_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
	{
	uint32_t r;
	unsigned int cpu_id = plat_my_core_pos();

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

	/* disable power up on IRQ */
	mmio_write_32(PMU_GLOBAL_REQ_PWRUP_DIS, 1 << cpu_id);

	/* clear powerdown bit */
	r = mmio_read_32(APU_PWRCTL);
	r &= ~(1 << cpu_id);
	mmio_write_32(APU_PWRCTL, r);
	}

	static void zynqmp_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
	{
	unsigned int cpu_id = plat_my_core_pos();
	const struct pm_proc *proc = pm_get_proc(cpu_id);

	for (size_t i = 0; 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 */
	if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
	plat_arm_gic_init();
	} else {
	gicv2_cpuif_enable();
	gicv2_pcpu_distif_init();
	}
	}

	/*******************************************************************************
	* ZynqMP handlers to shutdown/reboot the system
	******************************************************************************/
	static void __dead2 zynqmp_nopmu_system_off(void)
	{
	ERROR("ZynqMP System Off: operation not handled.\n");

	/* disable coherency */
	plat_arm_interconnect_exit_coherency();

	panic();
	}

	static void __dead2 zynqmp_system_off(void)
	{
	/* disable coherency */
	plat_arm_interconnect_exit_coherency();

	/* Send the power down request to the PMU */
	pm_system_shutdown(PMF_SHUTDOWN_TYPE_SHUTDOWN,
	PMF_SHUTDOWN_SUBTYPE_SUBSYSTEM);

	while (1)
	wfi();
	}

	static void __dead2 zynqmp_nopmu_system_reset(void)
	{
	/*
	* This currently triggers a system reset. I.e. the whole
	* system will be reset! Including RPUs, PMU, PL, etc.
	*/

	/* disable coherency */
	plat_arm_interconnect_exit_coherency();

	/* bypass RPLL (needed on 1.0 silicon) */
	uint32_t reg = mmio_read_32(CRL_APB_RPLL_CTRL);
	reg \|= CRL_APB_RPLL_CTRL_BYPASS;
	mmio_write_32(CRL_APB_RPLL_CTRL, reg);

	/* trigger system reset */
	mmio_write_32(CRL_APB_RESET_CTRL, CRL_APB_RESET_CTRL_SOFT_RESET);

	while (1)
	wfi();
	}

	static void __dead2 zynqmp_system_reset(void)
	{
	/* disable coherency */
	plat_arm_interconnect_exit_coherency();

	/* Send the system reset request to the PMU */
	pm_system_shutdown(PMF_SHUTDOWN_TYPE_RESET,
	PMF_SHUTDOWN_SUBTYPE_SUBSYSTEM);

	while (1)
	wfi();
	}

	int zynqmp_validate_power_state(unsigned int power_state,
	psci_power_state_t *req_state)
	{
	VERBOSE("%s: power_state: 0x%x\n", __func__, power_state);

	int pstate = psci_get_pstate_type(power_state);

	assert(req_state);

	/* 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))
	return PSCI_E_INVALID_PARAMS;

	return PSCI_E_SUCCESS;
	}

	int zynqmp_validate_ns_entrypoint(unsigned long ns_entrypoint)
	{
	VERBOSE("%s: ns_entrypoint: 0x%lx\n", __func__, ns_entrypoint);

	/* FIXME: Actually validate */
	return PSCI_E_SUCCESS;
	}

	void zynqmp_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;
	}

	/*******************************************************************************
	* Export the platform handlers to enable psci to invoke them
	******************************************************************************/
	static const struct plat_psci_ops zynqmp_psci_ops = {
	.cpu_standby = zynqmp_cpu_standby,
	.pwr_domain_on = zynqmp_pwr_domain_on,
	.pwr_domain_off = zynqmp_pwr_domain_off,
	.pwr_domain_suspend = zynqmp_pwr_domain_suspend,
	.pwr_domain_on_finish = zynqmp_pwr_domain_on_finish,
	.pwr_domain_suspend_finish = zynqmp_pwr_domain_suspend_finish,
	.system_off = zynqmp_system_off,
	.system_reset = zynqmp_system_reset,
	.validate_power_state = zynqmp_validate_power_state,
	.validate_ns_entrypoint = zynqmp_validate_ns_entrypoint,
	.get_sys_suspend_power_state = zynqmp_get_sys_suspend_power_state,
	};

	static const struct plat_psci_ops zynqmp_nopmu_psci_ops = {
	.cpu_standby = zynqmp_cpu_standby,
	.pwr_domain_on = zynqmp_nopmu_pwr_domain_on,
	.pwr_domain_off = zynqmp_nopmu_pwr_domain_off,
	.pwr_domain_suspend = zynqmp_nopmu_pwr_domain_suspend,
	.pwr_domain_on_finish = zynqmp_pwr_domain_on_finish,
	.pwr_domain_suspend_finish = zynqmp_nopmu_pwr_domain_suspend_finish,
	.system_off = zynqmp_nopmu_system_off,
	.system_reset = zynqmp_nopmu_system_reset,
	.validate_power_state = zynqmp_validate_power_state,
	.validate_ns_entrypoint = zynqmp_validate_ns_entrypoint,
	.get_sys_suspend_power_state = zynqmp_get_sys_suspend_power_state,
	};

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

	if (zynqmp_is_pmu_up())
	*psci_ops = &zynqmp_psci_ops;
	else
	*psci_ops = &zynqmp_nopmu_psci_ops;

	return 0;
	}