diff options
Diffstat (limited to 'services/std_svc/psci/psci_off.c')
| -rw-r--r-- | services/std_svc/psci/psci_off.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/services/std_svc/psci/psci_off.c b/services/std_svc/psci/psci_off.c deleted file mode 100644 index 36dab497..00000000 --- a/services/std_svc/psci/psci_off.c +++ /dev/null @@ -1,169 +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 <string.h> -#include "psci_private.h" - -/****************************************************************************** - * Construct the psci_power_state to request power OFF at all power levels. - ******************************************************************************/ -static void psci_set_power_off_state(psci_power_state_t *state_info) -{ - int lvl; - - for (lvl = PSCI_CPU_PWR_LVL; lvl <= PLAT_MAX_PWR_LVL; lvl++) - state_info->pwr_domain_state[lvl] = PLAT_MAX_OFF_STATE; -} - -/****************************************************************************** - * Top level handler which is called when a cpu wants to power itself down. - * It's assumed that along with turning the cpu power domain off, power - * domains at higher levels will be turned off as far as possible. It finds - * the highest level where a domain has to be powered off by traversing the - * node information and then performs generic, architectural, platform setup - * and state management required to turn OFF that power domain and domains - * below it. e.g. For a cpu that's to be powered OFF, it could mean programming - * the power controller whereas for a cluster that's to be powered off, it will - * call the platform specific code which will disable coherency at the - * interconnect level if the cpu is the last in the cluster and also the - * program the power controller. - ******************************************************************************/ -int psci_do_cpu_off(unsigned int end_pwrlvl) -{ - int rc = PSCI_E_SUCCESS, idx = plat_my_core_pos(); - psci_power_state_t state_info; - - /* - * This function must only be called on platforms where the - * CPU_OFF platform hooks have been implemented. - */ - assert(psci_plat_pm_ops->pwr_domain_off); - - /* - * This function acquires the lock corresponding to each power - * level so that by the time all locks are taken, the system topology - * is snapshot and state management can be done safely. - */ - psci_acquire_pwr_domain_locks(end_pwrlvl, - idx); - - /* - * Call the cpu off handler registered by the Secure Payload Dispatcher - * to let it do any bookkeeping. Assume that the SPD always reports an - * E_DENIED error if SP refuse to power down - */ - if (psci_spd_pm && psci_spd_pm->svc_off) { - rc = psci_spd_pm->svc_off(0); - if (rc) - goto exit; - } - - /* Construct the psci_power_state for CPU_OFF */ - psci_set_power_off_state(&state_info); - - /* - * This function is passed the requested state info and - * it returns the negotiated state info for each power level upto - * the end level specified. - */ - psci_do_state_coordination(end_pwrlvl, &state_info); - -#if ENABLE_PSCI_STAT - /* Update the last cpu for each level till end_pwrlvl */ - psci_stats_update_pwr_down(end_pwrlvl, &state_info); -#endif - - /* - * Arch. management. Perform the necessary steps to flush all - * cpu caches. - */ - psci_do_pwrdown_cache_maintenance(psci_find_max_off_lvl(&state_info)); - - /* - * Plat. management: Perform platform specific actions to turn this - * cpu off e.g. exit cpu coherency, program the power controller etc. - */ - psci_plat_pm_ops->pwr_domain_off(&state_info); - -#if ENABLE_PSCI_STAT - /* - * Capture time-stamp while entering low power state. - * No cache maintenance needed because caches are off - * and writes are direct to main memory. - */ - PMF_CAPTURE_TIMESTAMP(psci_svc, PSCI_STAT_ID_ENTER_LOW_PWR, - PMF_NO_CACHE_MAINT); -#endif - -exit: - /* - * Release the locks corresponding to each power level in the - * reverse order to which they were acquired. - */ - psci_release_pwr_domain_locks(end_pwrlvl, - idx); - - /* - * Check if all actions needed to safely power down this cpu have - * successfully completed. - */ - if (rc == PSCI_E_SUCCESS) { - /* - * Set the affinity info state to OFF. This writes directly to - * main memory as caches are disabled, so cache maintenance is - * required to ensure that later cached reads of aff_info_state - * return AFF_STATE_OFF. A dsbish() ensures ordering of the - * update to the affinity info state prior to cache line - * invalidation. - */ - flush_cpu_data(psci_svc_cpu_data.aff_info_state); - psci_set_aff_info_state(AFF_STATE_OFF); - dsbish(); - inv_cpu_data(psci_svc_cpu_data.aff_info_state); - - if (psci_plat_pm_ops->pwr_domain_pwr_down_wfi) { - /* This function must not return */ - psci_plat_pm_ops->pwr_domain_pwr_down_wfi(&state_info); - } else { - /* - * Enter a wfi loop which will allow the power - * controller to physically power down this cpu. - */ - psci_power_down_wfi(); - } - } - - return rc; -} |