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/*
* Copyright (c) 2015, 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 <assert.h>
#include <bl_common.h>
#include <context.h>
#include <context_mgmt.h>
#include <debug.h>
#include <memctrl.h>
#include <mmio.h>
#include <platform.h>
#include <platform_def.h>
#include <pmc.h>
#include <psci.h>
#include <tegra_def.h>
#include <tegra_private.h>
extern uint64_t tegra_bl31_phys_base;
extern uint64_t tegra_sec_entry_point;
/*
* The following platform setup functions are weakly defined. They
* provide typical implementations that will be overridden by a SoC.
*/
#pragma weak tegra_soc_pwr_domain_suspend
#pragma weak tegra_soc_pwr_domain_on
#pragma weak tegra_soc_pwr_domain_off
#pragma weak tegra_soc_pwr_domain_on_finish
#pragma weak tegra_soc_prepare_system_reset
#pragma weak tegra_soc_prepare_system_off
int tegra_soc_pwr_domain_suspend(const psci_power_state_t *target_state)
{
return PSCI_E_NOT_SUPPORTED;
}
int tegra_soc_pwr_domain_on(u_register_t mpidr)
{
return PSCI_E_SUCCESS;
}
int tegra_soc_pwr_domain_off(const psci_power_state_t *target_state)
{
return PSCI_E_SUCCESS;
}
int tegra_soc_pwr_domain_on_finish(const psci_power_state_t *target_state)
{
return PSCI_E_SUCCESS;
}
int tegra_soc_prepare_system_reset(void)
{
return PSCI_E_SUCCESS;
}
__dead2 void tegra_soc_prepare_system_off(void)
{
ERROR("Tegra System Off: operation not handled.\n");
panic();
}
/*******************************************************************************
* This handler is called by the PSCI implementation during the `SYSTEM_SUSPEND`
* call to get the `power_state` parameter. This allows the platform to encode
* the appropriate State-ID field within the `power_state` parameter which can
* be utilized in `pwr_domain_suspend()` to suspend to system affinity level.
******************************************************************************/
void tegra_get_sys_suspend_power_state(psci_power_state_t *req_state)
{
/* lower affinities use PLAT_MAX_OFF_STATE */
for (int i = MPIDR_AFFLVL0; i < PLAT_MAX_PWR_LVL; i++)
req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE;
/* max affinity uses system suspend state id */
req_state->pwr_domain_state[PLAT_MAX_PWR_LVL] = PSTATE_ID_SOC_POWERDN;
}
/*******************************************************************************
* Handler called when an affinity instance is about to enter standby.
******************************************************************************/
void tegra_cpu_standby(plat_local_state_t cpu_state)
{
/*
* Enter standby state
* dsb is good practice before using wfi to enter low power states
*/
dsb();
wfi();
}
/*******************************************************************************
* Handler called when an affinity instance is about to be turned on. The
* level and mpidr determine the affinity instance.
******************************************************************************/
int tegra_pwr_domain_on(u_register_t mpidr)
{
return tegra_soc_pwr_domain_on(mpidr);
}
/*******************************************************************************
* Handler called when a power domain is about to be turned off. The
* target_state encodes the power state that each level should transition to.
******************************************************************************/
void tegra_pwr_domain_off(const psci_power_state_t *target_state)
{
tegra_soc_pwr_domain_off(target_state);
}
/*******************************************************************************
* Handler called when called when a power domain is about to be suspended. The
* target_state encodes the power state that each level should transition to.
******************************************************************************/
void tegra_pwr_domain_suspend(const psci_power_state_t *target_state)
{
tegra_soc_pwr_domain_suspend(target_state);
/* disable GICC */
tegra_gic_cpuif_deactivate();
}
/*******************************************************************************
* Handler called when a power domain has just been powered on after
* being turned off earlier. The target_state encodes the low power state that
* each level has woken up from.
******************************************************************************/
void tegra_pwr_domain_on_finish(const psci_power_state_t *target_state)
{
plat_params_from_bl2_t *plat_params;
/*
* Initialize the GIC cpu and distributor interfaces
*/
tegra_gic_setup();
/*
* Check if we are exiting from deep sleep.
*/
if (target_state->pwr_domain_state[PLAT_MAX_PWR_LVL] ==
PSTATE_ID_SOC_POWERDN) {
/*
* Lock scratch registers which hold the CPU vectors.
*/
tegra_pmc_lock_cpu_vectors();
/*
* SMMU configuration.
*/
tegra_memctrl_setup();
/*
* Security configuration to allow DRAM/device access.
*/
plat_params = bl31_get_plat_params();
tegra_memctrl_tzdram_setup(plat_params->tzdram_base,
plat_params->tzdram_size);
}
/*
* Reset hardware settings.
*/
tegra_soc_pwr_domain_on_finish(target_state);
}
/*******************************************************************************
* Handler called when a power domain has just been powered on after
* having been suspended earlier. The target_state encodes the low power state
* that each level has woken up from.
******************************************************************************/
void tegra_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
{
tegra_pwr_domain_on_finish(target_state);
}
/*******************************************************************************
* Handler called when the system wants to be powered off
******************************************************************************/
__dead2 void tegra_system_off(void)
{
INFO("Powering down system...\n");
tegra_soc_prepare_system_off();
}
/*******************************************************************************
* Handler called when the system wants to be restarted.
******************************************************************************/
__dead2 void tegra_system_reset(void)
{
INFO("Restarting system...\n");
/* per-SoC system reset handler */
tegra_soc_prepare_system_reset();
/*
* Program the PMC in order to restart the system.
*/
tegra_pmc_system_reset();
}
/*******************************************************************************
* Handler called to check the validity of the power state parameter.
******************************************************************************/
int32_t tegra_validate_power_state(unsigned int power_state,
psci_power_state_t *req_state)
{
int pwr_lvl = psci_get_pstate_pwrlvl(power_state);
assert(req_state);
if (pwr_lvl > PLAT_MAX_PWR_LVL)
return PSCI_E_INVALID_PARAMS;
return tegra_soc_validate_power_state(power_state, req_state);
}
/*******************************************************************************
* Platform handler called to check the validity of the non secure entrypoint.
******************************************************************************/
int tegra_validate_ns_entrypoint(uintptr_t entrypoint)
{
/*
* Check if the non secure entrypoint lies within the non
* secure DRAM.
*/
if ((entrypoint >= TEGRA_DRAM_BASE) && (entrypoint <= TEGRA_DRAM_END))
return PSCI_E_SUCCESS;
return PSCI_E_INVALID_ADDRESS;
}
/*******************************************************************************
* Export the platform handlers to enable psci to invoke them
******************************************************************************/
static const plat_psci_ops_t tegra_plat_psci_ops = {
.cpu_standby = tegra_cpu_standby,
.pwr_domain_on = tegra_pwr_domain_on,
.pwr_domain_off = tegra_pwr_domain_off,
.pwr_domain_suspend = tegra_pwr_domain_suspend,
.pwr_domain_on_finish = tegra_pwr_domain_on_finish,
.pwr_domain_suspend_finish = tegra_pwr_domain_suspend_finish,
.system_off = tegra_system_off,
.system_reset = tegra_system_reset,
.validate_power_state = tegra_validate_power_state,
.validate_ns_entrypoint = tegra_validate_ns_entrypoint,
.get_sys_suspend_power_state = tegra_get_sys_suspend_power_state,
};
/*******************************************************************************
* Export the platform specific power ops and initialize Power Controller
******************************************************************************/
int plat_setup_psci_ops(uintptr_t sec_entrypoint,
const plat_psci_ops_t **psci_ops)
{
psci_power_state_t target_state = { { PSCI_LOCAL_STATE_RUN } };
/*
* Flush entrypoint variable to PoC since it will be
* accessed after a reset with the caches turned off.
*/
tegra_sec_entry_point = sec_entrypoint;
flush_dcache_range((uint64_t)&tegra_sec_entry_point, sizeof(uint64_t));
/*
* Reset hardware settings.
*/
tegra_soc_pwr_domain_on_finish(&target_state);
/*
* Initialize PSCI ops struct
*/
*psci_ops = &tegra_plat_psci_ops;
return 0;
}