/* * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include #include #include #include #include #include #include "socfpga_mailbox.h" #include "socfpga_plat_def.h" #include "socfpga_reset_manager.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) { /* 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; }