// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Name: hwxfsleep.c - ACPI Hardware Sleep/Wake External Interfaces * * Copyright (C) 2000 - 2023, Intel Corp. * *****************************************************************************/ #define EXPORT_ACPI_INTERFACES #include <acpi/acpi.h> #include "accommon.h" #define _COMPONENT … ACPI_MODULE_NAME("hwxfsleep") /* Local prototypes */ static acpi_status acpi_hw_set_firmware_waking_vector(struct acpi_table_facs *facs, acpi_physical_address physical_address, acpi_physical_address physical_address64); /******************************************************************************* * * FUNCTION: acpi_hw_set_firmware_waking_vector * * PARAMETERS: facs - Pointer to FACS table * physical_address - 32-bit physical address of ACPI real mode * entry point * physical_address64 - 64-bit physical address of ACPI protected * mode entry point * * RETURN: Status * * DESCRIPTION: Sets the firmware_waking_vector fields of the FACS * ******************************************************************************/ static acpi_status acpi_hw_set_firmware_waking_vector(struct acpi_table_facs *facs, acpi_physical_address physical_address, acpi_physical_address physical_address64) { … } /******************************************************************************* * * FUNCTION: acpi_set_firmware_waking_vector * * PARAMETERS: physical_address - 32-bit physical address of ACPI real mode * entry point * physical_address64 - 64-bit physical address of ACPI protected * mode entry point * * RETURN: Status * * DESCRIPTION: Sets the firmware_waking_vector fields of the FACS * ******************************************************************************/ acpi_status acpi_set_firmware_waking_vector(acpi_physical_address physical_address, acpi_physical_address physical_address64) { … } ACPI_EXPORT_SYMBOL(…) /* * These functions are removed for the ACPI_REDUCED_HARDWARE case: * acpi_enter_sleep_state_s4bios */ #if (!ACPI_REDUCED_HARDWARE) /******************************************************************************* * * FUNCTION: acpi_enter_sleep_state_s4bios * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Perform a S4 bios request. * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED * ******************************************************************************/ acpi_status acpi_enter_sleep_state_s4bios(void) { u32 in_value; acpi_status status; ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios); /* Clear the wake status bit (PM1) */ status = acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } status = acpi_hw_clear_acpi_status(); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* * 1) Disable all GPEs * 2) Enable all wakeup GPEs */ status = acpi_hw_disable_all_gpes(); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } acpi_gbl_system_awake_and_running = FALSE; status = acpi_hw_enable_all_wakeup_gpes(); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } status = acpi_hw_write_port(acpi_gbl_FADT.smi_command, (u32)acpi_gbl_FADT.s4_bios_request, 8); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } do { acpi_os_stall(ACPI_USEC_PER_MSEC); status = acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } } while (!in_value); return_ACPI_STATUS(AE_OK); } ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) #endif /* !ACPI_REDUCED_HARDWARE */ /******************************************************************************* * * FUNCTION: acpi_enter_sleep_state_prep * * PARAMETERS: sleep_state - Which sleep state to enter * * RETURN: Status * * DESCRIPTION: Prepare to enter a system sleep state. * This function must execute with interrupts enabled. * We break sleeping into 2 stages so that OSPM can handle * various OS-specific tasks between the two steps. * ******************************************************************************/ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) { … } ACPI_EXPORT_SYMBOL(…) /******************************************************************************* * * FUNCTION: acpi_enter_sleep_state * * PARAMETERS: sleep_state - Which sleep state to enter * * RETURN: Status * * DESCRIPTION: Enter a system sleep state * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED * ******************************************************************************/ acpi_status acpi_enter_sleep_state(u8 sleep_state) { … } ACPI_EXPORT_SYMBOL(…) /******************************************************************************* * * FUNCTION: acpi_leave_sleep_state_prep * * PARAMETERS: sleep_state - Which sleep state we are exiting * * RETURN: Status * * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a * sleep. Called with interrupts DISABLED. * We break wake/resume into 2 stages so that OSPM can handle * various OS-specific tasks between the two steps. * ******************************************************************************/ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) { … } ACPI_EXPORT_SYMBOL(…) /******************************************************************************* * * FUNCTION: acpi_leave_sleep_state * * PARAMETERS: sleep_state - Which sleep state we are exiting * * RETURN: Status * * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep * Called with interrupts ENABLED. * ******************************************************************************/ acpi_status acpi_leave_sleep_state(u8 sleep_state) { … } ACPI_EXPORT_SYMBOL(…)
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