diff options
Diffstat (limited to '')
| -rw-r--r-- | plat/intel/soc/common/socfpga_psci.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/plat/intel/soc/common/socfpga_psci.c b/plat/intel/soc/common/socfpga_psci.c new file mode 100644 index 0000000..5fd6559 --- /dev/null +++ b/plat/intel/soc/common/socfpga_psci.c @@ -0,0 +1,229 @@ +/* + * Copyright (c) 2019-2022, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch_helpers.h> +#include <common/debug.h> +#include <drivers/arm/gicv2.h> +#include <lib/mmio.h> +#include <lib/psci/psci.h> +#include <plat/common/platform.h> + +#include "socfpga_mailbox.h" +#include "socfpga_plat_def.h" +#include "socfpga_reset_manager.h" +#include "socfpga_sip_svc.h" + + +/******************************************************************************* + * plat handler called when a CPU is about to enter standby. + ******************************************************************************/ +void socfpga_cpu_standby(plat_local_state_t cpu_state) +{ + /* + * Enter standby state + * dsb is good practice before using wfi to enter low power states + */ + VERBOSE("%s: cpu_state: 0x%x\n", __func__, cpu_state); + dsb(); + wfi(); +} + +/******************************************************************************* + * plat handler called when a power domain is about to be turned on. The + * mpidr determines the CPU to be turned on. + ******************************************************************************/ +int socfpga_pwr_domain_on(u_register_t mpidr) +{ + unsigned int cpu_id = plat_core_pos_by_mpidr(mpidr); + + VERBOSE("%s: mpidr: 0x%lx\n", __func__, mpidr); + + if (cpu_id == -1) + return PSCI_E_INTERN_FAIL; + + mmio_write_64(PLAT_CPUID_RELEASE, cpu_id); + + /* release core reset */ + mmio_setbits_32(SOCFPGA_RSTMGR(MPUMODRST), 1 << cpu_id); + return PSCI_E_SUCCESS; +} + +/******************************************************************************* + * plat 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 socfpga_pwr_domain_off(const psci_power_state_t *target_state) +{ + 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 */ + gicv2_cpuif_disable(); +} + +/******************************************************************************* + * plat handler called when a power domain is about to be suspended. The + * target_state encodes the power state that each level should transition to. + ******************************************************************************/ +void socfpga_pwr_domain_suspend(const psci_power_state_t *target_state) +{ + unsigned int cpu_id = plat_my_core_pos(); + + 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]); + + /* assert core reset */ + mmio_setbits_32(SOCFPGA_RSTMGR(MPUMODRST), 1 << cpu_id); + +} + +/******************************************************************************* + * plat 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 socfpga_pwr_domain_on_finish(const psci_power_state_t *target_state) +{ + 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]); + + /* Program the gic per-cpu distributor or re-distributor interface */ + gicv2_pcpu_distif_init(); + gicv2_set_pe_target_mask(plat_my_core_pos()); + + /* Enable the gic cpu interface */ + gicv2_cpuif_enable(); +} + +/******************************************************************************* + * plat 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. + * TODO: At the moment we reuse the on finisher and reinitialize the secure + * context. Need to implement a separate suspend finisher. + ******************************************************************************/ +void socfpga_pwr_domain_suspend_finish(const psci_power_state_t *target_state) +{ + unsigned int cpu_id = plat_my_core_pos(); + + 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]); + + /* release core reset */ + mmio_clrbits_32(SOCFPGA_RSTMGR(MPUMODRST), 1 << cpu_id); +} + +/******************************************************************************* + * plat handlers to shutdown/reboot the system + ******************************************************************************/ +static void __dead2 socfpga_system_off(void) +{ + wfi(); + ERROR("System Off: operation not handled.\n"); + panic(); +} + +extern uint64_t intel_rsu_update_address; + +static void __dead2 socfpga_system_reset(void) +{ + uint32_t addr_buf[2]; + + memcpy(addr_buf, &intel_rsu_update_address, + sizeof(intel_rsu_update_address)); + + if (intel_rsu_update_address) + mailbox_rsu_update(addr_buf); + else + mailbox_reset_cold(); + + while (1) + wfi(); +} + +static int socfpga_system_reset2(int is_vendor, int reset_type, + u_register_t cookie) +{ + if (cold_reset_for_ecc_dbe()) { + mailbox_reset_cold(); + } + /* disable cpuif */ + gicv2_cpuif_disable(); + + /* Store magic number */ + mmio_write_32(L2_RESET_DONE_REG, L2_RESET_DONE_STATUS); + + /* Increase timeout */ + mmio_write_32(SOCFPGA_RSTMGR(HDSKTIMEOUT), 0xffffff); + + /* Enable handshakes */ + mmio_setbits_32(SOCFPGA_RSTMGR(HDSKEN), RSTMGR_HDSKEN_SET); + + /* Reset L2 module */ + mmio_setbits_32(SOCFPGA_RSTMGR(COLDMODRST), 0x100); + + while (1) + wfi(); + + /* Should not reach here */ + return 0; +} + +int socfpga_validate_power_state(unsigned int power_state, + psci_power_state_t *req_state) +{ + VERBOSE("%s: power_state: 0x%x\n", __func__, power_state); + + return PSCI_E_SUCCESS; +} + +int socfpga_validate_ns_entrypoint(unsigned long ns_entrypoint) +{ + VERBOSE("%s: ns_entrypoint: 0x%lx\n", __func__, ns_entrypoint); + return PSCI_E_SUCCESS; +} + +void socfpga_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; +} + +/******************************************************************************* + * Export the platform handlers via plat_arm_psci_pm_ops. The ARM Standard + * platform layer will take care of registering the handlers with PSCI. + ******************************************************************************/ +const plat_psci_ops_t socfpga_psci_pm_ops = { + .cpu_standby = socfpga_cpu_standby, + .pwr_domain_on = socfpga_pwr_domain_on, + .pwr_domain_off = socfpga_pwr_domain_off, + .pwr_domain_suspend = socfpga_pwr_domain_suspend, + .pwr_domain_on_finish = socfpga_pwr_domain_on_finish, + .pwr_domain_suspend_finish = socfpga_pwr_domain_suspend_finish, + .system_off = socfpga_system_off, + .system_reset = socfpga_system_reset, + .system_reset2 = socfpga_system_reset2, + .validate_power_state = socfpga_validate_power_state, + .validate_ns_entrypoint = socfpga_validate_ns_entrypoint, + .get_sys_suspend_power_state = socfpga_get_sys_suspend_power_state +}; + +/******************************************************************************* + * Export the platform specific power ops. + ******************************************************************************/ +int plat_setup_psci_ops(uintptr_t sec_entrypoint, + const struct plat_psci_ops **psci_ops) +{ + /* Save warm boot entrypoint.*/ + mmio_write_64(PLAT_SEC_ENTRY, sec_entrypoint); + *psci_ops = &socfpga_psci_pm_ops; + + return 0; +} |