patch-2.4.6 linux/drivers/acpi/utilities/utxface.c

• Lines: 477
• Date: Wed Jun 20 17:47:40 2001
• Orig file: v2.4.5/linux/drivers/acpi/utilities/utxface.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/utilities/utxface.c linux/drivers/acpi/utilities/utxface.c
@@ -0,0 +1,476 @@
+/******************************************************************************
+ *
+ * Module Name: utxface - External interfaces for "global" ACPI functions
+ *              $Revision: 72 $
+ *
+ *****************************************************************************/
+
+/*
+ *  Copyright (C) 2000, 2001 R. Byron Moore
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include "acpi.h"
+#include "acevents.h"
+#include "achware.h"
+#include "acnamesp.h"
+#include "acinterp.h"
+#include "amlcode.h"
+#include "acdebug.h"
+
+
+#define _COMPONENT          ACPI_UTILITIES
+	 MODULE_NAME         ("utxface")
+
+
+/*******************************************************************************
+ *
+ * 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_initialize_subsystem (
+	void)
+{
+	ACPI_STATUS             status;
+
+
+	/* Initialize all globals used by the subsystem */
+
+	acpi_ut_init_globals ();
+
+	/* Initialize the OS-Dependent layer */
+
+	status = acpi_os_initialize ();
+	if (ACPI_FAILURE (status)) {
+		REPORT_ERROR (("OSD failed to initialize, %s\n",
+			acpi_ut_format_exception (status)));
+		return (status);
+	}
+
+	/* Create the default mutex objects */
+
+	status = acpi_ut_mutex_initialize ();
+	if (ACPI_FAILURE (status)) {
+		REPORT_ERROR (("Global mutex creation failure, %s\n",
+			acpi_ut_format_exception (status)));
+		return (status);
+	}
+
+	/*
+	 * Initialize the namespace manager and
+	 * the root of the namespace tree
+	 */
+
+	status = acpi_ns_root_initialize ();
+	if (ACPI_FAILURE (status)) {
+		REPORT_ERROR (("Namespace initialization failure, %s\n",
+			acpi_ut_format_exception (status)));
+		return (status);
+	}
+
+
+	/* If configured, initialize the AML debugger */
+
+	DEBUGGER_EXEC (acpi_db_initialize ());
+
+	return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * 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_enable_subsystem (
+	u32                     flags)
+{
+	ACPI_STATUS             status = AE_OK;
+
+
+	/* Sanity check the FADT for valid values */
+
+	status = acpi_ut_validate_fadt ();
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	/*
+	 * Install the default Op_region handlers. These are
+	 * installed unless other handlers have already been
+	 * installed via the Install_address_space_handler interface
+	 */
+
+	if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
+		status = acpi_ev_install_default_address_space_handlers ();
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+	}
+
+	/*
+	 * We must initialize the hardware before we can enable ACPI.
+	 */
+
+	if (!(flags & ACPI_NO_HARDWARE_INIT)) {
+		status = acpi_hw_initialize ();
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+	}
+
+	/*
+	 * Enable ACPI on this platform
+	 */
+
+	if (!(flags & ACPI_NO_ACPI_ENABLE)) {
+		status = acpi_enable ();
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+	}
+
+	/*
+	 * Note:
+	 * 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 initialized before execution!
+	 */
+
+	if (!(flags & ACPI_NO_EVENT_INIT)) {
+		status = acpi_ev_initialize ();
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+	}
+
+
+	/*
+	 * Initialize all device objects in the namespace
+	 * This runs the _STA and _INI methods.
+	 */
+
+	if (!(flags & ACPI_NO_DEVICE_INIT)) {
+		status = acpi_ns_initialize_devices ();
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+	}
+
+
+	/*
+	 * Initialize the objects that remain uninitialized.  This
+	 * runs the executable AML that is part of the declaration of Op_regions
+	 * and Fields.
+	 */
+
+	if (!(flags & ACPI_NO_OBJECT_INIT)) {
+		status = acpi_ns_initialize_objects ();
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+	}
+
+
+	return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_terminate
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Shutdown the ACPI subsystem.  Release all resources.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_terminate (void)
+{
+	ACPI_STATUS             status;
+
+
+	/* Ensure that ACPI has been initialized */
+
+	ACPI_IS_INITIALIZATION_COMPLETE (status);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	/* Terminate the AML Debugger if present */
+
+	DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
+
+	/* TBD: [Investigate] This is no longer needed?*/
+/*    Acpi_ut_release_mutex (ACPI_MTX_DEBUG_CMD_READY); */
+
+
+	/* Shutdown and free all resources */
+
+	acpi_ut_subsystem_shutdown ();
+
+
+	/* Free the mutex objects */
+
+	acpi_ut_mutex_terminate ();
+
+
+	/* Now we can shutdown the OS-dependent layer */
+
+	acpi_os_terminate ();
+
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_get_system_info
+ *
+ * PARAMETERS:  Out_buffer      - a pointer to a buffer to receive the
+ *                                resources for the device
+ *              Buffer_length   - the number of bytes available in the buffer
+ *
+ * RETURN:      Status          - the status of the call
+ *
+ * DESCRIPTION: This function is called to get information about the current
+ *              state of the ACPI subsystem.  It will return system information
+ *              in the Out_buffer.
+ *
+ *              If the function fails an appropriate status will be returned
+ *              and the value of Out_buffer is undefined.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_get_system_info (
+	ACPI_BUFFER             *out_buffer)
+{
+	ACPI_SYSTEM_INFO        *info_ptr;
+	u32                     i;
+	ACPI_STATUS             status;
+
+
+	/* Ensure that ACPI has been initialized */
+
+	ACPI_IS_INITIALIZATION_COMPLETE (status);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	/*
+	 *  Must have a valid buffer
+	 */
+	if ((!out_buffer)         ||
+		(!out_buffer->pointer)) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	if (out_buffer->length < sizeof (ACPI_SYSTEM_INFO)) {
+		/*
+		 *  Caller's buffer is too small
+		 */
+		out_buffer->length = sizeof (ACPI_SYSTEM_INFO);
+
+		return (AE_BUFFER_OVERFLOW);
+	}
+
+
+	/*
+	 *  Set return length and get data
+	 */
+	out_buffer->length = sizeof (ACPI_SYSTEM_INFO);
+	info_ptr = (ACPI_SYSTEM_INFO *) out_buffer->pointer;
+
+	info_ptr->acpi_ca_version   = ACPI_CA_VERSION;
+
+	/* System flags (ACPI capabilities) */
+
+	info_ptr->flags             = acpi_gbl_system_flags;
+
+	/* Timer resolution - 24 or 32 bits  */
+	if (!acpi_gbl_FADT) {
+		info_ptr->timer_resolution = 0;
+	}
+	else if (acpi_gbl_FADT->tmr_val_ext == 0) {
+		info_ptr->timer_resolution = 24;
+	}
+	else {
+		info_ptr->timer_resolution = 32;
+	}
+
+	/* Clear the reserved fields */
+
+	info_ptr->reserved1         = 0;
+	info_ptr->reserved2         = 0;
+
+	/* Current debug levels */
+
+	info_ptr->debug_layer       = acpi_dbg_layer;
+	info_ptr->debug_level       = acpi_dbg_level;
+
+	/* Current status of the ACPI tables, per table type */
+
+	info_ptr->num_table_types = NUM_ACPI_TABLES;
+	for (i = 0; i < NUM_ACPI_TABLES; i++) {
+		info_ptr->table_info[i].count = acpi_gbl_acpi_tables[i].count;
+	}
+
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_format_exception
+ *
+ * PARAMETERS:  Out_buffer      - a pointer to a buffer to receive the
+ *                                exception name
+ *
+ * RETURN:      Status          - the status of the call
+ *
+ * DESCRIPTION: This function translates an ACPI exception into an ASCII string.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_format_exception (
+	ACPI_STATUS             exception,
+	ACPI_BUFFER             *out_buffer)
+{
+	u32                     length;
+	NATIVE_CHAR             *formatted_exception;
+
+
+	/*
+	 *  Must have a valid buffer
+	 */
+	if ((!out_buffer)         ||
+		(!out_buffer->pointer)) {
+		return (AE_BAD_PARAMETER);
+	}
+
+
+	/* Convert the exception code (Handles bad exception codes) */
+
+	formatted_exception = acpi_ut_format_exception (exception);
+
+	/*
+	 * Get length of string and check if it will fit in caller's buffer
+	 */
+
+	length = STRLEN (formatted_exception);
+	if (out_buffer->length < length) {
+		out_buffer->length = length;
+		return (AE_BUFFER_OVERFLOW);
+	}
+
+
+	/* Copy the string, all done */
+
+	STRCPY (out_buffer->pointer, formatted_exception);
+
+	return (AE_OK);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    Acpi_allocate
+ *
+ * PARAMETERS:  Size                - Size of the allocation
+ *
+ * RETURN:      Address of the allocated memory on success, NULL on failure.
+ *
+ * DESCRIPTION: The subsystem's equivalent of malloc.
+ *              External front-end to the Ut* memory manager
+ *
+ ****************************************************************************/
+
+void *
+acpi_allocate (
+	u32                     size)
+{
+
+	return (acpi_ut_allocate (size));
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    Acpi_callocate
+ *
+ * PARAMETERS:  Size                - Size of the allocation
+ *
+ * RETURN:      Address of the allocated memory on success, NULL on failure.
+ *
+ * DESCRIPTION: The subsystem's equivalent of calloc.
+ *              External front-end to the Ut* memory manager
+ *
+ ****************************************************************************/
+
+void *
+acpi_callocate (
+	u32                     size)
+{
+
+	return (acpi_ut_callocate (size));
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    Acpi_free
+ *
+ * PARAMETERS:  Address             - Address of the memory to deallocate
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Frees the memory at Address
+ *              External front-end to the Ut* memory manager
+ *
+ ****************************************************************************/
+
+void
+acpi_free (
+	void                    *address)
+{
+
+	acpi_ut_free (address);
+}