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Diffstat (limited to 'services/std_svc/psci/psci_main.c')
| -rw-r--r-- | services/std_svc/psci/psci_main.c | 440 |
1 files changed, 0 insertions, 440 deletions
diff --git a/services/std_svc/psci/psci_main.c b/services/std_svc/psci/psci_main.c deleted file mode 100644 index 86f45ca3..00000000 --- a/services/std_svc/psci/psci_main.c +++ /dev/null @@ -1,440 +0,0 @@ -/* - * Copyright (c) 2013-2015, 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.h> -#include <arch_helpers.h> -#include <assert.h> -#include <debug.h> -#include <platform.h> -#include <runtime_svc.h> -#include <std_svc.h> -#include <string.h> -#include "psci_private.h" - -/******************************************************************************* - * PSCI frontend api for servicing SMCs. Described in the PSCI spec. - ******************************************************************************/ -int psci_cpu_on(u_register_t target_cpu, - uintptr_t entrypoint, - u_register_t context_id) - -{ - int rc; - entry_point_info_t ep; - - /* Determine if the cpu exists of not */ - rc = psci_validate_mpidr(target_cpu); - if (rc != PSCI_E_SUCCESS) - return PSCI_E_INVALID_PARAMS; - - /* Validate the entry point and get the entry_point_info */ - rc = psci_validate_entry_point(&ep, entrypoint, context_id); - if (rc != PSCI_E_SUCCESS) - return rc; - - /* - * To turn this cpu on, specify which power - * levels need to be turned on - */ - return psci_cpu_on_start(target_cpu, &ep); -} - -unsigned int psci_version(void) -{ - return PSCI_MAJOR_VER | PSCI_MINOR_VER; -} - -int psci_cpu_suspend(unsigned int power_state, - uintptr_t entrypoint, - u_register_t context_id) -{ - int rc; - unsigned int target_pwrlvl, is_power_down_state; - entry_point_info_t ep; - psci_power_state_t state_info = { {PSCI_LOCAL_STATE_RUN} }; - plat_local_state_t cpu_pd_state; - - /* Validate the power_state parameter */ - rc = psci_validate_power_state(power_state, &state_info); - if (rc != PSCI_E_SUCCESS) { - assert(rc == PSCI_E_INVALID_PARAMS); - return rc; - } - - /* - * Get the value of the state type bit from the power state parameter. - */ - is_power_down_state = psci_get_pstate_type(power_state); - - /* Sanity check the requested suspend levels */ - assert (psci_validate_suspend_req(&state_info, is_power_down_state) - == PSCI_E_SUCCESS); - - target_pwrlvl = psci_find_target_suspend_lvl(&state_info); - - /* Fast path for CPU standby.*/ - if (is_cpu_standby_req(is_power_down_state, target_pwrlvl)) { - if (!psci_plat_pm_ops->cpu_standby) - return PSCI_E_INVALID_PARAMS; - - /* - * Set the state of the CPU power domain to the platform - * specific retention state and enter the standby state. - */ - cpu_pd_state = state_info.pwr_domain_state[PSCI_CPU_PWR_LVL]; - psci_set_cpu_local_state(cpu_pd_state); - -#if ENABLE_PSCI_STAT - /* - * Capture time-stamp before CPU standby - * No cache maintenance is needed as caches - * are ON through out the CPU standby operation. - */ - PMF_CAPTURE_TIMESTAMP(psci_svc, PSCI_STAT_ID_ENTER_LOW_PWR, - PMF_NO_CACHE_MAINT); -#endif - - psci_plat_pm_ops->cpu_standby(cpu_pd_state); - - /* Upon exit from standby, set the state back to RUN. */ - psci_set_cpu_local_state(PSCI_LOCAL_STATE_RUN); - -#if ENABLE_PSCI_STAT - /* Capture time-stamp after CPU standby */ - PMF_CAPTURE_TIMESTAMP(psci_svc, PSCI_STAT_ID_EXIT_LOW_PWR, - PMF_NO_CACHE_MAINT); - - /* Update PSCI stats */ - psci_stats_update_pwr_up(PSCI_CPU_PWR_LVL, &state_info, - PMF_NO_CACHE_MAINT); -#endif - - return PSCI_E_SUCCESS; - } - - /* - * If a power down state has been requested, we need to verify entry - * point and program entry information. - */ - if (is_power_down_state) { - rc = psci_validate_entry_point(&ep, entrypoint, context_id); - if (rc != PSCI_E_SUCCESS) - return rc; - } - - /* - * Do what is needed to enter the power down state. Upon success, - * enter the final wfi which will power down this CPU. This function - * might return if the power down was abandoned for any reason, e.g. - * arrival of an interrupt - */ - psci_cpu_suspend_start(&ep, - target_pwrlvl, - &state_info, - is_power_down_state); - - return PSCI_E_SUCCESS; -} - - -int psci_system_suspend(uintptr_t entrypoint, u_register_t context_id) -{ - int rc; - psci_power_state_t state_info; - entry_point_info_t ep; - - /* Check if the current CPU is the last ON CPU in the system */ - if (!psci_is_last_on_cpu()) - return PSCI_E_DENIED; - - /* Validate the entry point and get the entry_point_info */ - rc = psci_validate_entry_point(&ep, entrypoint, context_id); - if (rc != PSCI_E_SUCCESS) - return rc; - - /* Query the psci_power_state for system suspend */ - psci_query_sys_suspend_pwrstate(&state_info); - - /* Ensure that the psci_power_state makes sense */ - assert(psci_find_target_suspend_lvl(&state_info) == PLAT_MAX_PWR_LVL); - assert(psci_validate_suspend_req(&state_info, PSTATE_TYPE_POWERDOWN) - == PSCI_E_SUCCESS); - assert(is_local_state_off(state_info.pwr_domain_state[PLAT_MAX_PWR_LVL])); - - /* - * Do what is needed to enter the system suspend state. This function - * might return if the power down was abandoned for any reason, e.g. - * arrival of an interrupt - */ - psci_cpu_suspend_start(&ep, - PLAT_MAX_PWR_LVL, - &state_info, - PSTATE_TYPE_POWERDOWN); - - return PSCI_E_SUCCESS; -} - -int psci_cpu_off(void) -{ - int rc; - unsigned int target_pwrlvl = PLAT_MAX_PWR_LVL; - - /* - * Do what is needed to power off this CPU and possible higher power - * levels if it able to do so. Upon success, enter the final wfi - * which will power down this CPU. - */ - rc = psci_do_cpu_off(target_pwrlvl); - - /* - * The only error cpu_off can return is E_DENIED. So check if that's - * indeed the case. - */ - assert (rc == PSCI_E_DENIED); - - return rc; -} - -int psci_affinity_info(u_register_t target_affinity, - unsigned int lowest_affinity_level) -{ - unsigned int target_idx; - - /* We dont support level higher than PSCI_CPU_PWR_LVL */ - if (lowest_affinity_level > PSCI_CPU_PWR_LVL) - return PSCI_E_INVALID_PARAMS; - - /* Calculate the cpu index of the target */ - target_idx = plat_core_pos_by_mpidr(target_affinity); - if (target_idx == -1) - return PSCI_E_INVALID_PARAMS; - - return psci_get_aff_info_state_by_idx(target_idx); -} - -int psci_migrate(u_register_t target_cpu) -{ - int rc; - u_register_t resident_cpu_mpidr; - - rc = psci_spd_migrate_info(&resident_cpu_mpidr); - if (rc != PSCI_TOS_UP_MIG_CAP) - return (rc == PSCI_TOS_NOT_UP_MIG_CAP) ? - PSCI_E_DENIED : PSCI_E_NOT_SUPPORTED; - - /* - * Migrate should only be invoked on the CPU where - * the Secure OS is resident. - */ - if (resident_cpu_mpidr != read_mpidr_el1()) - return PSCI_E_NOT_PRESENT; - - /* Check the validity of the specified target cpu */ - rc = psci_validate_mpidr(target_cpu); - if (rc != PSCI_E_SUCCESS) - return PSCI_E_INVALID_PARAMS; - - assert(psci_spd_pm && psci_spd_pm->svc_migrate); - - rc = psci_spd_pm->svc_migrate(read_mpidr_el1(), target_cpu); - assert(rc == PSCI_E_SUCCESS || rc == PSCI_E_INTERN_FAIL); - - return rc; -} - -int psci_migrate_info_type(void) -{ - u_register_t resident_cpu_mpidr; - - return psci_spd_migrate_info(&resident_cpu_mpidr); -} - -long psci_migrate_info_up_cpu(void) -{ - u_register_t resident_cpu_mpidr; - int rc; - - /* - * Return value of this depends upon what - * psci_spd_migrate_info() returns. - */ - rc = psci_spd_migrate_info(&resident_cpu_mpidr); - if (rc != PSCI_TOS_NOT_UP_MIG_CAP && rc != PSCI_TOS_UP_MIG_CAP) - return PSCI_E_INVALID_PARAMS; - - return resident_cpu_mpidr; -} - -int psci_features(unsigned int psci_fid) -{ - unsigned int local_caps = psci_caps; - - /* Check if it is a 64 bit function */ - if (((psci_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_64) - local_caps &= PSCI_CAP_64BIT_MASK; - - /* Check for invalid fid */ - if (!(is_std_svc_call(psci_fid) && is_valid_fast_smc(psci_fid) - && is_psci_fid(psci_fid))) - return PSCI_E_NOT_SUPPORTED; - - - /* Check if the psci fid is supported or not */ - if (!(local_caps & define_psci_cap(psci_fid))) - return PSCI_E_NOT_SUPPORTED; - - /* Format the feature flags */ - if (psci_fid == PSCI_CPU_SUSPEND_AARCH32 || - psci_fid == PSCI_CPU_SUSPEND_AARCH64) { - /* - * The trusted firmware does not support OS Initiated Mode. - */ - return (FF_PSTATE << FF_PSTATE_SHIFT) | - ((!FF_SUPPORTS_OS_INIT_MODE) << FF_MODE_SUPPORT_SHIFT); - } - - /* Return 0 for all other fid's */ - return PSCI_E_SUCCESS; -} - -/******************************************************************************* - * PSCI top level handler for servicing SMCs. - ******************************************************************************/ -uint64_t psci_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) -{ - if (is_caller_secure(flags)) - SMC_RET1(handle, SMC_UNK); - - /* Check the fid against the capabilities */ - if (!(psci_caps & define_psci_cap(smc_fid))) - SMC_RET1(handle, SMC_UNK); - - if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) { - /* 32-bit PSCI function, clear top parameter bits */ - - x1 = (uint32_t)x1; - x2 = (uint32_t)x2; - x3 = (uint32_t)x3; - - switch (smc_fid) { - case PSCI_VERSION: - SMC_RET1(handle, psci_version()); - - case PSCI_CPU_OFF: - SMC_RET1(handle, psci_cpu_off()); - - case PSCI_CPU_SUSPEND_AARCH32: - SMC_RET1(handle, psci_cpu_suspend(x1, x2, x3)); - - case PSCI_CPU_ON_AARCH32: - SMC_RET1(handle, psci_cpu_on(x1, x2, x3)); - - case PSCI_AFFINITY_INFO_AARCH32: - SMC_RET1(handle, psci_affinity_info(x1, x2)); - - case PSCI_MIG_AARCH32: - SMC_RET1(handle, psci_migrate(x1)); - - case PSCI_MIG_INFO_TYPE: - SMC_RET1(handle, psci_migrate_info_type()); - - case PSCI_MIG_INFO_UP_CPU_AARCH32: - SMC_RET1(handle, psci_migrate_info_up_cpu()); - - case PSCI_SYSTEM_SUSPEND_AARCH32: - SMC_RET1(handle, psci_system_suspend(x1, x2)); - - case PSCI_SYSTEM_OFF: - psci_system_off(); - /* We should never return from psci_system_off() */ - - case PSCI_SYSTEM_RESET: - psci_system_reset(); - /* We should never return from psci_system_reset() */ - - case PSCI_FEATURES: - SMC_RET1(handle, psci_features(x1)); - -#if ENABLE_PSCI_STAT - case PSCI_STAT_RESIDENCY_AARCH32: - SMC_RET1(handle, psci_stat_residency(x1, x2)); - - case PSCI_STAT_COUNT_AARCH32: - SMC_RET1(handle, psci_stat_count(x1, x2)); -#endif - - default: - break; - } - } else { - /* 64-bit PSCI function */ - - switch (smc_fid) { - case PSCI_CPU_SUSPEND_AARCH64: - SMC_RET1(handle, psci_cpu_suspend(x1, x2, x3)); - - case PSCI_CPU_ON_AARCH64: - SMC_RET1(handle, psci_cpu_on(x1, x2, x3)); - - case PSCI_AFFINITY_INFO_AARCH64: - SMC_RET1(handle, psci_affinity_info(x1, x2)); - - case PSCI_MIG_AARCH64: - SMC_RET1(handle, psci_migrate(x1)); - - case PSCI_MIG_INFO_UP_CPU_AARCH64: - SMC_RET1(handle, psci_migrate_info_up_cpu()); - - case PSCI_SYSTEM_SUSPEND_AARCH64: - SMC_RET1(handle, psci_system_suspend(x1, x2)); - -#if ENABLE_PSCI_STAT - case PSCI_STAT_RESIDENCY_AARCH64: - SMC_RET1(handle, psci_stat_residency(x1, x2)); - - case PSCI_STAT_COUNT_AARCH64: - SMC_RET1(handle, psci_stat_count(x1, x2)); -#endif - - default: - break; - } - } - - WARN("Unimplemented PSCI Call: 0x%x \n", smc_fid); - SMC_RET1(handle, SMC_UNK); -} |