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/*
* 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);
}