226 lines
6.4 KiB
C
226 lines
6.4 KiB
C
/*
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* Copyright (c) 2013-2016, 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 <errno.h>
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#include <arch_helpers.h>
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#include <common/debug.h>
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#include <drivers/arm/gicv2.h>
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#include <lib/mmio.h>
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#include <lib/psci/psci.h>
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#include <plat/arm/common/plat_arm.h>
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#include <plat/common/platform.h>
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#include <plat_private.h>
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#include "pm_api_sys.h"
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#include "pm_client.h"
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uintptr_t zynqmp_sec_entry;
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void zynqmp_cpu_standby(plat_local_state_t cpu_state)
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{
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VERBOSE("%s: cpu_state: 0x%x\n", __func__, cpu_state);
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dsb();
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wfi();
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}
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static int zynqmp_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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/* Clear power down request */
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pm_client_wakeup(proc);
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/* Send request to PMU to wake up selected APU CPU core */
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pm_req_wakeup(proc->node_id, 1, zynqmp_sec_entry, REQ_ACK_BLOCKING);
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return PSCI_E_SUCCESS;
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}
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static void zynqmp_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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gicv2_cpuif_disable();
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/*
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* Send request to PMU 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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static void zynqmp_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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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 PMU to suspend this core */
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pm_self_suspend(proc->node_id, MAX_LATENCY, state, zynqmp_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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static void zynqmp_pwr_domain_on_finish(const psci_power_state_t *target_state)
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{
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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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gicv2_cpuif_enable();
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gicv2_pcpu_distif_init();
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}
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static void zynqmp_pwr_domain_suspend_finish(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 */
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if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
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plat_arm_gic_init();
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} else {
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gicv2_cpuif_enable();
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gicv2_pcpu_distif_init();
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}
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}
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/*******************************************************************************
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* ZynqMP handlers to shutdown/reboot the system
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******************************************************************************/
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static void __dead2 zynqmp_system_off(void)
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{
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/* disable coherency */
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plat_arm_interconnect_exit_coherency();
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/* Send the power down request to the PMU */
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pm_system_shutdown(PMF_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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static void __dead2 zynqmp_system_reset(void)
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{
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/* disable coherency */
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plat_arm_interconnect_exit_coherency();
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/* Send the system reset request to the PMU */
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pm_system_shutdown(PMF_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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int zynqmp_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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int zynqmp_validate_ns_entrypoint(unsigned long ns_entrypoint)
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{
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VERBOSE("%s: ns_entrypoint: 0x%lx\n", __func__, ns_entrypoint);
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/* FIXME: Actually validate */
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return PSCI_E_SUCCESS;
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}
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void zynqmp_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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/*******************************************************************************
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* Export the platform handlers to enable psci to invoke them
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******************************************************************************/
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static const struct plat_psci_ops zynqmp_psci_ops = {
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.cpu_standby = zynqmp_cpu_standby,
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.pwr_domain_on = zynqmp_pwr_domain_on,
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.pwr_domain_off = zynqmp_pwr_domain_off,
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.pwr_domain_suspend = zynqmp_pwr_domain_suspend,
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.pwr_domain_on_finish = zynqmp_pwr_domain_on_finish,
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.pwr_domain_suspend_finish = zynqmp_pwr_domain_suspend_finish,
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.system_off = zynqmp_system_off,
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.system_reset = zynqmp_system_reset,
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.validate_power_state = zynqmp_validate_power_state,
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.validate_ns_entrypoint = zynqmp_validate_ns_entrypoint,
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.get_sys_suspend_power_state = zynqmp_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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zynqmp_sec_entry = sec_entrypoint;
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*psci_ops = &zynqmp_psci_ops;
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return 0;
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}
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