diff options
Diffstat (limited to 'plat/socionext/synquacer/sq_psci.c')
| -rw-r--r-- | plat/socionext/synquacer/sq_psci.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/plat/socionext/synquacer/sq_psci.c b/plat/socionext/synquacer/sq_psci.c new file mode 100644 index 0000000..017516f --- /dev/null +++ b/plat/socionext/synquacer/sq_psci.c @@ -0,0 +1,215 @@ +/* + * Copyright (c) 2018-2022, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <errno.h> + +#include <platform_def.h> + +#include <arch_helpers.h> +#include <common/debug.h> +#include <drivers/delay_timer.h> +#include <drivers/generic_delay_timer.h> +#include <lib/cassert.h> +#include <lib/psci/psci.h> + +#include <sq_common.h> +#include "sq_scpi.h" + +uintptr_t sq_sec_entrypoint; + +int sq_pwr_domain_on(u_register_t mpidr) +{ +#if SQ_USE_SCMI_DRIVER + sq_scmi_on(mpidr); +#else + /* + * SCP takes care of powering up parent power domains so we + * only need to care about level 0 + */ + scpi_set_sq_power_state(mpidr, scpi_power_on, scpi_power_on, + scpi_power_on); +#endif + + return PSCI_E_SUCCESS; +} + +static void sq_pwr_domain_on_finisher_common( + const psci_power_state_t *target_state) +{ + assert(SQ_CORE_PWR_STATE(target_state) == SQ_LOCAL_STATE_OFF); + + /* + * Perform the common cluster specific operations i.e enable coherency + * if this cluster was off. + */ + if (SQ_CLUSTER_PWR_STATE(target_state) == SQ_LOCAL_STATE_OFF) + plat_sq_interconnect_enter_coherency(); +} + +void sq_pwr_domain_on_finish(const psci_power_state_t *target_state) +{ + /* Assert that the system power domain need not be initialized */ + assert(SQ_SYSTEM_PWR_STATE(target_state) == SQ_LOCAL_STATE_RUN); + + sq_pwr_domain_on_finisher_common(target_state); + + /* Program the gic per-cpu distributor or re-distributor interface */ + sq_gic_pcpu_init(); + + /* Enable the gic cpu interface */ + sq_gic_cpuif_enable(); +} + +#if !SQ_USE_SCMI_DRIVER +static void sq_power_down_common(const psci_power_state_t *target_state) +{ + uint32_t cluster_state = scpi_power_on; + uint32_t system_state = scpi_power_on; + + /* Prevent interrupts from spuriously waking up this cpu */ + sq_gic_cpuif_disable(); + + /* Check if power down at system power domain level is requested */ + if (SQ_SYSTEM_PWR_STATE(target_state) == SQ_LOCAL_STATE_OFF) + system_state = scpi_power_retention; + + /* Cluster is to be turned off, so disable coherency */ + if (SQ_CLUSTER_PWR_STATE(target_state) == SQ_LOCAL_STATE_OFF) { + plat_sq_interconnect_exit_coherency(); + cluster_state = scpi_power_off; + } + + /* + * Ask the SCP to power down the appropriate components depending upon + * their state. + */ + scpi_set_sq_power_state(read_mpidr_el1(), + scpi_power_off, + cluster_state, + system_state); +} +#endif + +void sq_pwr_domain_off(const psci_power_state_t *target_state) +{ +#if SQ_USE_SCMI_DRIVER + /* Prevent interrupts from spuriously waking up this cpu */ + sq_gic_cpuif_disable(); + + /* Cluster is to be turned off, so disable coherency */ + if (SQ_CLUSTER_PWR_STATE(target_state) == SQ_LOCAL_STATE_OFF) { + plat_sq_interconnect_exit_coherency(); + } + + sq_scmi_off(target_state); +#else + sq_power_down_common(target_state); +#endif +} + +void __dead2 sq_system_off(void) +{ +#if SQ_USE_SCMI_DRIVER + sq_scmi_sys_shutdown(); +#else + volatile uint32_t *gpio = (uint32_t *)PLAT_SQ_GPIO_BASE; + + /* set PD[9] high to power off the system */ + gpio[5] |= 0x2; /* set output */ + gpio[1] |= 0x2; /* set high */ + dmbst(); + + generic_delay_timer_init(); + + mdelay(1); + + while (1) { + gpio[1] &= ~0x2; /* set low */ + dmbst(); + + mdelay(1); + + gpio[1] |= 0x2; /* set high */ + dmbst(); + + mdelay(100); + } + + wfi(); + ERROR("SQ System Off: operation not handled.\n"); + panic(); +#endif +} + +void __dead2 sq_system_reset(void) +{ +#if SQ_USE_SCMI_DRIVER + sq_scmi_sys_reboot(); +#else + uint32_t response; + + /* Send the system reset request to the SCP */ + response = scpi_sys_power_state(scpi_system_reboot); + + if (response != SCP_OK) { + ERROR("SQ System Reset: SCP error %u.\n", response); + panic(); + } + wfi(); + ERROR("SQ System Reset: operation not handled.\n"); + panic(); +#endif +} + +void sq_cpu_standby(plat_local_state_t cpu_state) +{ + u_register_t scr; + + assert(cpu_state == SQ_LOCAL_STATE_RET); + + scr = read_scr_el3(); + /* Enable PhysicalIRQ bit for NS world to wake the CPU */ + write_scr_el3(scr | SCR_IRQ_BIT); + isb(); + dsb(); + wfi(); + + /* + * Restore SCR to the original value, synchronisation of scr_el3 is + * done by eret while el3_exit to save some execution cycles. + */ + write_scr_el3(scr); +} + +const plat_psci_ops_t sq_psci_ops = { + .pwr_domain_on = sq_pwr_domain_on, + .pwr_domain_off = sq_pwr_domain_off, + .pwr_domain_on_finish = sq_pwr_domain_on_finish, + .cpu_standby = sq_cpu_standby, + .system_off = sq_system_off, + .system_reset = sq_system_reset, +}; + +int plat_setup_psci_ops(uintptr_t sec_entrypoint, + const struct plat_psci_ops **psci_ops) +{ +#if !RESET_TO_BL31 + uintptr_t *sq_sec_ep = (uintptr_t *)BL2_MAILBOX_BASE; + + *sq_sec_ep = sec_entrypoint; + flush_dcache_range((uint64_t)sq_sec_ep, + sizeof(*sq_sec_ep)); +#else + sq_sec_entrypoint = sec_entrypoint; + flush_dcache_range((uint64_t)&sq_sec_entrypoint, + sizeof(sq_sec_entrypoint)); +#endif + + *psci_ops = &sq_psci_ops; + + return 0; +} |