1 files changed, 256 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utxfinit.c b/drivers/acpi/acpica/utxfinit.c
new file mode 100644
index 000000000..653e3bb20
--- /dev/null
+++ b/drivers/acpi/acpica/utxfinit.c
@@ -0,0 +1,256 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: utxfinit - External interfaces for ACPICA initialization
+ *
+ * Copyright (C) 2000 - 2020, Intel Corp.
+ *
+ *****************************************************************************/
+
+#define EXPORT_ACPI_INTERFACES
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acevents.h"
+#include "acnamesp.h"
+#include "acdebug.h"
+#include "actables.h"
+
+#define _COMPONENT          ACPI_UTILITIES
+ACPI_MODULE_NAME("utxfinit")
+
+/* For acpi_exec only */
+void ae_do_object_overrides(void);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_initialize_subsystem
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initializes all global variables. This is the first function
+ *              called, so any early initialization belongs here.
+ *
+ ******************************************************************************/
+
+acpi_status ACPI_INIT_FUNCTION acpi_initialize_subsystem(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
+
+	acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
+	ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
+
+	/* Initialize the OS-Dependent layer */
+
+	status = acpi_os_initialize();
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
+		return_ACPI_STATUS(status);
+	}
+
+	/* Initialize all globals used by the subsystem */
+
+	status = acpi_ut_init_globals();
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"During initialization of globals"));
+		return_ACPI_STATUS(status);
+	}
+
+	/* Create the default mutex objects */
+
+	status = acpi_ut_mutex_initialize();
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"During Global Mutex creation"));
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * Initialize the namespace manager and
+	 * the root of the namespace tree
+	 */
+	status = acpi_ns_root_initialize();
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"During Namespace initialization"));
+		return_ACPI_STATUS(status);
+	}
+
+	/* Initialize the global OSI interfaces list with the static names */
+
+	status = acpi_ut_initialize_interfaces();
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"During OSI interfaces initialization"));
+		return_ACPI_STATUS(status);
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enable_subsystem
+ *
+ * PARAMETERS:  flags               - Init/enable Options
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Completes the subsystem initialization including hardware.
+ *              Puts system into ACPI mode if it isn't already.
+ *
+ ******************************************************************************/
+acpi_status ACPI_INIT_FUNCTION acpi_enable_subsystem(u32 flags)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
+
+	/*
+	 * The early initialization phase is complete. The namespace is loaded,
+	 * and we can now support address spaces other than Memory, I/O, and
+	 * PCI_Config.
+	 */
+	acpi_gbl_early_initialization = FALSE;
+
+#if (!ACPI_REDUCED_HARDWARE)
+
+	/* Enable ACPI mode */
+
+	if (!(flags & ACPI_NO_ACPI_ENABLE)) {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "[Init] Going into ACPI mode\n"));
+
+		acpi_gbl_original_mode = acpi_hw_get_mode();
+
+		status = acpi_enable();
+		if (ACPI_FAILURE(status)) {
+			ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
+			return_ACPI_STATUS(status);
+		}
+	}
+
+	/*
+	 * Obtain a permanent mapping for the FACS. This is required for the
+	 * Global Lock and the Firmware Waking Vector
+	 */
+	if (!(flags & ACPI_NO_FACS_INIT)) {
+		status = acpi_tb_initialize_facs();
+		if (ACPI_FAILURE(status)) {
+			ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
+			return_ACPI_STATUS(status);
+		}
+	}
+
+	/*
+	 * Initialize ACPI Event handling (Fixed and General Purpose)
+	 *
+	 * Note1: We must have the hardware and events initialized before we can
+	 * execute any control methods safely. Any control method can require
+	 * ACPI hardware support, so the hardware must be fully initialized before
+	 * any method execution!
+	 *
+	 * Note2: Fixed events are initialized and enabled here. GPEs are
+	 * initialized, but cannot be enabled until after the hardware is
+	 * completely initialized (SCI and global_lock activated) and the various
+	 * initialization control methods are run (_REG, _STA, _INI) on the
+	 * entire namespace.
+	 */
+	if (!(flags & ACPI_NO_EVENT_INIT)) {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "[Init] Initializing ACPI events\n"));
+
+		status = acpi_ev_initialize_events();
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+	}
+
+	/*
+	 * Install the SCI handler and Global Lock handler. This completes the
+	 * hardware initialization.
+	 */
+	if (!(flags & ACPI_NO_HANDLER_INIT)) {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "[Init] Installing SCI/GL handlers\n"));
+
+		status = acpi_ev_install_xrupt_handlers();
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+	}
+#endif				/* !ACPI_REDUCED_HARDWARE */
+
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_initialize_objects
+ *
+ * PARAMETERS:  flags               - Init/enable Options
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Completes namespace initialization by initializing device
+ *              objects and executing AML code for Regions, buffers, etc.
+ *
+ ******************************************************************************/
+acpi_status ACPI_INIT_FUNCTION acpi_initialize_objects(u32 flags)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(acpi_initialize_objects);
+
+#ifdef ACPI_OBSOLETE_BEHAVIOR
+	/*
+	 * 05/2019: Removed, initialization now happens at both object
+	 * creation and table load time
+	 */
+
+	/*
+	 * Initialize the objects that remain uninitialized. This
+	 * runs the executable AML that may be part of the
+	 * declaration of these objects: operation_regions, buffer_fields,
+	 * bank_fields, Buffers, and Packages.
+	 */
+	if (!(flags & ACPI_NO_OBJECT_INIT)) {
+		status = acpi_ns_initialize_objects();
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+	}
+#endif
+
+	/*
+	 * Initialize all device/region objects in the namespace. This runs
+	 * the device _STA and _INI methods and region _REG methods.
+	 */
+	if (!(flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT))) {
+		status = acpi_ns_initialize_devices(flags);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+	}
+
+	/*
+	 * Empty the caches (delete the cached objects) on the assumption that
+	 * the table load filled them up more than they will be at runtime --
+	 * thus wasting non-paged memory.
+	 */
+	status = acpi_purge_cached_objects();
+
+	acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects)