feat(versal-net): add support for platform management
Add support for PM EEMI interface for Versal_net. Also use PM
APIs in psci ops. Added TFA_NO_PM flag to disable PM functionality.
Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Change-Id: If2b2941c868bc9b0850d7f3adb81eac0e660c149
diff --git a/plat/xilinx/versal_net/plat_psci_pm.c b/plat/xilinx/versal_net/plat_psci_pm.c
new file mode 100644
index 0000000..8beaa9a
--- /dev/null
+++ b/plat/xilinx/versal_net/plat_psci_pm.c
@@ -0,0 +1,264 @@
+/*
+ * Copyright (c) 2022, Xilinx, Inc. All rights reserved.
+ * Copyright (C) 2022, 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 <plat_private.h>
+#include "pm_api_sys.h"
+#include "pm_client.h"
+#include <pm_common.h>
+#include "pm_svc_main.h"
+#include "versal_net_def.h"
+
+static uintptr_t versal_net_sec_entry;
+
+static int32_t versal_net_pwr_domain_on(u_register_t mpidr)
+{
+ uint32_t cpu_id = plat_core_pos_by_mpidr(mpidr);
+ const struct pm_proc *proc;
+
+ VERBOSE("%s: mpidr: 0x%lx, cpuid: %x\n",
+ __func__, mpidr, cpu_id);
+
+ if (cpu_id == -1) {
+ return PSCI_E_INTERN_FAIL;
+ }
+
+ proc = pm_get_proc(cpu_id);
+ if (!proc) {
+ return PSCI_E_INTERN_FAIL;
+ }
+
+ pm_req_wakeup(proc->node_id, (versal_net_sec_entry & 0xFFFFFFFFU) | 0x1U,
+ versal_net_sec_entry >> 32, 0, 0);
+
+ /* Clear power down request */
+ pm_client_wakeup(proc);
+
+ return PSCI_E_SUCCESS;
+}
+
+/**
+ * versal_net_pwr_domain_off() - This function performs actions to turn off core
+ *
+ * @param target_state Targeted state
+ */
+static void versal_net_pwr_domain_off(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);
+
+ 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 */
+ plat_versal_net_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.
+ */
+ pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0,
+ SECURE_FLAG);
+}
+
+/**
+ * versal_net_system_reset() - This function sends the reset request
+ * to firmware for the system to reset. This function does not return.
+ */
+static void __dead2 versal_net_system_reset(void)
+{
+ /* Send the system reset request to the PMC */
+ pm_system_shutdown(XPM_SHUTDOWN_TYPE_RESET,
+ pm_get_shutdown_scope(), SECURE_FLAG);
+
+ while (1) {
+ wfi();
+ }
+}
+
+/**
+ * versal_net_pwr_domain_suspend() - This function sends request to PMC to suspend
+ * core.
+ *
+ * @param target_state Targeted state
+ */
+static void versal_net_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);
+
+ 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]);
+ }
+
+ plat_versal_net_gic_cpuif_disable();
+
+ if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
+ plat_versal_net_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 */
+ pm_self_suspend(proc->node_id, MAX_LATENCY, state, versal_net_sec_entry,
+ SECURE_FLAG);
+
+ /* TODO: disable coherency */
+}
+
+static void versal_net_pwr_domain_on_finish(const psci_power_state_t *target_state)
+{
+ (void)target_state;
+
+ /* Enable the gic cpu interface */
+ plat_versal_net_gic_pcpu_init();
+
+ /* Program the gic per-cpu distributor or re-distributor interface */
+ plat_versal_net_gic_cpuif_enable();
+}
+
+/**
+ * versal_net_pwr_domain_suspend_finish() - This function performs actions to finish
+ * suspend procedure.
+ *
+ * @param target_state Targeted state
+ */
+static void versal_net_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);
+
+ 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);
+
+ /* TODO: enable coherency */
+
+ /* APU was turned off, so restore GIC context */
+ if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
+ plat_versal_net_gic_resume();
+ }
+
+ plat_versal_net_gic_cpuif_enable();
+}
+
+/**
+ * versal_net_system_off() - This function sends the system off request
+ * to firmware. This function does not return.
+ */
+static void __dead2 versal_net_system_off(void)
+{
+ /* Send the power down request to the PMC */
+ pm_system_shutdown(XPM_SHUTDOWN_TYPE_SHUTDOWN,
+ pm_get_shutdown_scope(), SECURE_FLAG);
+
+ while (1) {
+ wfi();
+ }
+}
+
+/**
+ * versal_net_validate_power_state() - This function ensures that the power state
+ * parameter in request is valid.
+ *
+ * @param power_state Power state of core
+ * @param req_state Requested state
+ *
+ * @return Returns status, either PSCI_E_SUCCESS or reason
+ */
+static int32_t versal_net_validate_power_state(unsigned int power_state,
+ psci_power_state_t *req_state)
+{
+ VERBOSE("%s: power_state: 0x%x\n", __func__, power_state);
+
+ int32_t 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;
+}
+
+/**
+ * versal_net_get_sys_suspend_power_state() - Get power state for system suspend
+ *
+ * @param req_state Requested state
+ */
+static void versal_net_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_net_nopmc_psci_ops = {
+ .pwr_domain_on = versal_net_pwr_domain_on,
+ .pwr_domain_off = versal_net_pwr_domain_off,
+ .pwr_domain_on_finish = versal_net_pwr_domain_on_finish,
+ .pwr_domain_suspend = versal_net_pwr_domain_suspend,
+ .pwr_domain_suspend_finish = versal_net_pwr_domain_suspend_finish,
+ .system_off = versal_net_system_off,
+ .system_reset = versal_net_system_reset,
+ .validate_power_state = versal_net_validate_power_state,
+ .get_sys_suspend_power_state = versal_net_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_net_sec_entry = sec_entrypoint;
+
+ VERBOSE("Setting up entry point %lx\n", versal_net_sec_entry);
+
+ *psci_ops = &versal_net_nopmc_psci_ops;
+
+ return 0;
+}
+
+int32_t sip_svc_setup_init(void)
+{
+ return pm_setup();
+}
+
+uint64_t smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3, uint64_t x4,
+ void *cookie, void *handle, uint64_t flags)
+{
+ return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags);
+}