static int acpi_pm_enter(suspend_state_t pm_state) { acpi_status status = AE_OK; unsigned long flags = 0; u32 acpi_state = acpi_suspend_states[pm_state]; ACPI_FLUSH_CPU_CACHE(); /* Do arch specific saving of state. */ if (pm_state > PM_SUSPEND_STANDBY) { int error = acpi_save_state_mem(); if (error) return error; } local_irq_save(flags); acpi_enable_wakeup_device(acpi_state); switch (pm_state) { case PM_SUSPEND_STANDBY: barrier(); status = acpi_enter_sleep_state(acpi_state); break; case PM_SUSPEND_MEM: do_suspend_lowlevel(); break; case PM_SUSPEND_DISK: if (acpi_pm_ops.pm_disk_mode == PM_DISK_PLATFORM) status = acpi_enter_sleep_state(acpi_state); else do_suspend_lowlevel_s4bios(); break; case PM_SUSPEND_MAX: acpi_power_off(); break; default: return -EINVAL; } local_irq_restore(flags); printk(KERN_DEBUG "Back to C!\n"); /* restore processor state * We should only be here if we're coming back from STR or STD. * And, in the case of the latter, the memory image should have already * been loaded from disk. */ if (pm_state > PM_SUSPEND_STANDBY) acpi_restore_state_mem(); return ACPI_SUCCESS(status) ? 0 : -EFAULT; }
acpi_status acpi_system_suspend( u32 state) { acpi_status status = AE_ERROR; unsigned long flags = 0; local_irq_save(flags); /* kernel_fpu_begin(); */ switch (state) { case ACPI_STATE_S1: case ACPI_STATE_S5: barrier(); status = acpi_enter_sleep_state(state); break; case ACPI_STATE_S4: do_suspend_lowlevel_s4bios(0); break; } /* kernel_fpu_end(); */ local_irq_restore(flags); return status; }
static void acpi_power_off (void) { printk("%s called\n",__FUNCTION__); /* Some SMP machines only can poweroff in boot CPU */ set_cpus_allowed(current, cpumask_of_cpu(0)); acpi_enter_sleep_state_prep(ACPI_STATE_S5); ACPI_DISABLE_IRQS(); acpi_enter_sleep_state(ACPI_STATE_S5); }
/** * acpi_suspend_enter - Actually enter a sleep state. * @pm_state: ignored * * Flush caches and go to sleep. For STR we have to call arch-specific * assembly, which in turn call acpi_enter_sleep_state(). * It's unfortunate, but it works. Please fix if you're feeling frisky. */ static int acpi_suspend_enter(suspend_state_t pm_state) { acpi_status status = AE_OK; unsigned long flags = 0; u32 acpi_state = acpi_target_sleep_state; ACPI_FLUSH_CPU_CACHE(); /* Do arch specific saving of state. */ if (acpi_state == ACPI_STATE_S3) { int error = acpi_save_state_mem(); if (error) return error; } local_irq_save(flags); acpi_enable_wakeup_device(acpi_state); switch (acpi_state) { case ACPI_STATE_S1: barrier(); status = acpi_enter_sleep_state(acpi_state); break; case ACPI_STATE_S3: do_suspend_lowlevel(); break; } /* Reprogram control registers and execute _BFS */ acpi_leave_sleep_state_prep(acpi_state); /* ACPI 3.0 specs (P62) says that it's the responsibility * of the OSPM to clear the status bit [ implying that the * POWER_BUTTON event should not reach userspace ] */ if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) acpi_clear_event(ACPI_EVENT_POWER_BUTTON); /* * Disable and clear GPE status before interrupt is enabled. Some GPEs * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. * acpi_leave_sleep_state will reenable specific GPEs later */ acpi_hw_disable_all_gpes(); local_irq_restore(flags); printk(KERN_DEBUG "Back to C!\n"); /* restore processor state */ if (acpi_state == ACPI_STATE_S3) acpi_restore_state_mem(); return ACPI_SUCCESS(status) ? 0 : -EFAULT; }
void acpi_power_off(void) { /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ printk("%s called\n", __FUNCTION__); local_irq_disable(); /* Some SMP machines only can poweroff in boot CPU */ #ifdef CONFIG_ACPI_SLEEP acpi_enable_wakeup_device(ACPI_STATE_S5); #endif acpi_enter_sleep_state(ACPI_STATE_S5); }
static void acpi_power_off (void) { if (unlikely(in_interrupt())) BUG(); /* Some SMP machines only can poweroff in boot CPU */ set_cpus_allowed(current, 1UL << cpu_logical_map(0)); acpi_enter_sleep_state_prep(ACPI_STATE_S5); ACPI_DISABLE_IRQS(); acpi_enter_sleep_state(ACPI_STATE_S5); printk(KERN_EMERG "ACPI: can not power off machine\n"); }
static int acpi_hibernation_enter(void) { acpi_status status = AE_OK; unsigned long flags = 0; ACPI_FLUSH_CPU_CACHE(); local_irq_save(flags); acpi_enable_wakeup_device(ACPI_STATE_S4); /* This shouldn't return. If it returns, we have a problem */ status = acpi_enter_sleep_state(ACPI_STATE_S4); /* Reprogram control registers and execute _BFS */ acpi_leave_sleep_state_prep(ACPI_STATE_S4); local_irq_restore(flags); return ACPI_SUCCESS(status) ? 0 : -EFAULT; }
/* Main interface to do xen specific suspend/resume */ static int enter_state(u32 state) { unsigned long flags; int error; unsigned long cr4; if ( (state <= ACPI_STATE_S0) || (state > ACPI_S_STATES_MAX) ) return -EINVAL; if ( !spin_trylock(&pm_lock) ) return -EBUSY; BUG_ON(system_state != SYS_STATE_active); system_state = SYS_STATE_suspend; printk(XENLOG_INFO "Preparing system for ACPI S%d state.\n", state); freeze_domains(); acpi_dmar_reinstate(); if ( (error = disable_nonboot_cpus()) ) { system_state = SYS_STATE_resume; goto enable_cpu; } cpufreq_del_cpu(0); hvm_cpu_down(); acpi_sleep_prepare(state); console_start_sync(); printk("Entering ACPI S%d state.\n", state); local_irq_save(flags); spin_debug_disable(); if ( (error = device_power_down()) ) { printk(XENLOG_ERR "Some devices failed to power down."); system_state = SYS_STATE_resume; goto done; } ACPI_FLUSH_CPU_CACHE(); switch ( state ) { case ACPI_STATE_S3: do_suspend_lowlevel(); system_reset_counter++; error = tboot_s3_resume(); break; case ACPI_STATE_S5: acpi_enter_sleep_state(ACPI_STATE_S5); break; default: error = -EINVAL; break; } system_state = SYS_STATE_resume; /* Restore CR4 and EFER from cached values. */ cr4 = read_cr4(); write_cr4(cr4 & ~X86_CR4_MCE); write_efer(read_efer()); device_power_up(); mcheck_init(&boot_cpu_data, 0); write_cr4(cr4); printk(XENLOG_INFO "Finishing wakeup from ACPI S%d state.\n", state); if ( (state == ACPI_STATE_S3) && error ) tboot_s3_error(error); done: spin_debug_enable(); local_irq_restore(flags); console_end_sync(); acpi_sleep_post(state); if ( hvm_cpu_up() ) BUG(); enable_cpu: cpufreq_add_cpu(0); microcode_resume_cpu(0); rcu_barrier(); mtrr_aps_sync_begin(); enable_nonboot_cpus(); mtrr_aps_sync_end(); adjust_vtd_irq_affinities(); acpi_dmar_zap(); thaw_domains(); system_state = SYS_STATE_active; spin_unlock(&pm_lock); return error; }
static void acpi_db_do_one_sleep_state(u8 sleep_state) { acpi_status status; u8 sleep_type_a; u8 sleep_type_b; /* Validate parameter */ if (sleep_state > ACPI_S_STATES_MAX) { acpi_os_printf("Sleep state %d out of range (%d max)\n", sleep_state, ACPI_S_STATES_MAX); return; } acpi_os_printf("\n---- Invoking sleep state S%d (%s):\n", sleep_state, acpi_gbl_sleep_state_names[sleep_state]); /* Get the values for the sleep type registers (for display only) */ status = acpi_get_sleep_type_data(sleep_state, &sleep_type_a, &sleep_type_b); if (ACPI_FAILURE(status)) { acpi_os_printf("Could not evaluate [%s] method, %s\n", acpi_gbl_sleep_state_names[sleep_state], acpi_format_exception(status)); return; } acpi_os_printf ("Register values for sleep state S%d: Sleep-A: %.2X, Sleep-B: %.2X\n", sleep_state, sleep_type_a, sleep_type_b); /* Invoke the various sleep/wake interfaces */ acpi_os_printf("**** Sleep: Prepare to sleep (S%d) ****\n", sleep_state); status = acpi_enter_sleep_state_prep(sleep_state); if (ACPI_FAILURE(status)) { goto error_exit; } acpi_os_printf("**** Sleep: Going to sleep (S%d) ****\n", sleep_state); status = acpi_enter_sleep_state(sleep_state); if (ACPI_FAILURE(status)) { goto error_exit; } acpi_os_printf("**** Wake: Prepare to return from sleep (S%d) ****\n", sleep_state); status = acpi_leave_sleep_state_prep(sleep_state); if (ACPI_FAILURE(status)) { goto error_exit; } acpi_os_printf("**** Wake: Return from sleep (S%d) ****\n", sleep_state); status = acpi_leave_sleep_state(sleep_state); if (ACPI_FAILURE(status)) { goto error_exit; } return; error_exit: ACPI_EXCEPTION((AE_INFO, status, "During invocation of sleep state S%d", sleep_state)); }
asmlinkage void acpi_enter_s3(void) { acpi_enter_sleep_state(3, wake_sleep_flags); }
/* Main interface to do xen specific suspend/resume */ static int enter_state(u32 state) { unsigned long flags; int error; if ( (state <= ACPI_STATE_S0) || (state > ACPI_S_STATES_MAX) ) return -EINVAL; if ( !spin_trylock(&pm_lock) ) return -EBUSY; printk(XENLOG_INFO "Preparing system for ACPI S%d state.", state); freeze_domains(); disable_nonboot_cpus(); if ( num_online_cpus() != 1 ) { error = -EBUSY; goto enable_cpu; } cpufreq_del_cpu(0); hvm_cpu_down(); acpi_sleep_prepare(state); console_start_sync(); printk("Entering ACPI S%d state.\n", state); local_irq_save(flags); spin_debug_disable(); if ( (error = device_power_down()) ) { printk(XENLOG_ERR "Some devices failed to power down."); goto done; } ACPI_FLUSH_CPU_CACHE(); switch ( state ) { case ACPI_STATE_S3: do_suspend_lowlevel(); system_reset_counter++; error = tboot_s3_resume(); break; case ACPI_STATE_S5: acpi_enter_sleep_state(ACPI_STATE_S5); break; default: error = -EINVAL; break; } /* Restore CR4 and EFER from cached values. */ write_cr4(read_cr4()); if ( cpu_has_efer ) write_efer(read_efer()); device_power_up(); printk(XENLOG_INFO "Finishing wakeup from ACPI S%d state.\n", state); if ( (state == ACPI_STATE_S3) && error ) panic("Memory integrity was lost on resume (%d)\n", error); done: spin_debug_enable(); local_irq_restore(flags); console_end_sync(); acpi_sleep_post(state); if ( !hvm_cpu_up() ) BUG(); enable_cpu: cpufreq_add_cpu(0); microcode_resume_cpu(0); enable_nonboot_cpus(); thaw_domains(); spin_unlock(&pm_lock); return error; }
static int acpi_pm_enter(suspend_state_t pm_state) { acpi_status status = AE_OK; unsigned long flags = 0; u32 acpi_state = acpi_suspend_states[pm_state]; ACPI_FLUSH_CPU_CACHE(); /* Do arch specific saving of state. */ if (pm_state > PM_SUSPEND_STANDBY) { int error = acpi_save_state_mem(); if (error) return error; } local_irq_save(flags); acpi_enable_wakeup_device(acpi_state); switch (pm_state) { case PM_SUSPEND_STANDBY: barrier(); status = acpi_enter_sleep_state(acpi_state); break; case PM_SUSPEND_MEM: if (unlikely(acpi_simulate_suspend_to_ram)) { printk(KERN_INFO "ACPI: simulating suspend-to-RAM: " "not calling BIOS.\n"); } else { do_suspend_lowlevel(); } break; case PM_SUSPEND_DISK: if (acpi_pm_ops.pm_disk_mode == PM_DISK_PLATFORM) status = acpi_enter_sleep_state(acpi_state); break; case PM_SUSPEND_MAX: acpi_power_off(); break; default: return -EINVAL; } /* ACPI 3.0 specs (P62) says that it's the responsabilty * of the OSPM to clear the status bit [ implying that the * POWER_BUTTON event should not reach userspace ] */ if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) acpi_clear_event(ACPI_EVENT_POWER_BUTTON); local_irq_restore(flags); printk(KERN_DEBUG "Back to C!\n"); /* restore processor state * We should only be here if we're coming back from STR or STD. * And, in the case of the latter, the memory image should have already * been loaded from disk. */ if (pm_state > PM_SUSPEND_STANDBY) acpi_restore_state_mem(); return ACPI_SUCCESS(status) ? 0 : -EFAULT; }