patch-2.4.0-test3 linux/drivers/acpi/common/cmxface.c

• Lines: 269
• Date: Wed Jul 5 11:23:12 2000
• Orig file: v2.4.0-test2/linux/drivers/acpi/common/cmxface.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test2/linux/drivers/acpi/common/cmxface.c linux/drivers/acpi/common/cmxface.c
@@ -0,0 +1,268 @@
+/******************************************************************************
+ *
+ * Module Name: cmxface - External interfaces for "global" ACPI functions
+ *
+ *****************************************************************************/
+
+/*
+ *  Copyright (C) 2000 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 "events.h"
+#include "hardware.h"
+#include "namesp.h"
+#include "interp.h"
+#include "amlcode.h"
+#include "debugger.h"
+
+
+#define _COMPONENT          MISCELLANEOUS
+	 MODULE_NAME         ("cmxface");
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_initialize
+ *
+ * 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 (ACPI_INIT_DATA *init_data)
+{
+	ACPI_STATUS             status;
+
+
+	/* Initialize all globals used by the subsystem */
+
+	acpi_cm_init_globals (init_data);
+
+	/* Initialize the OS-Dependent layer */
+
+	status = acpi_os_initialize ();
+	if (ACPI_FAILURE (status)) {
+		REPORT_ERROR ("OSD Initialization Failure");
+		return (status);
+	}
+
+	/* Create the default mutex objects */
+
+	status = acpi_cm_mutex_initialize ();
+	if (ACPI_FAILURE (status)) {
+		REPORT_ERROR ("Global Mutex Initialization Failure");
+		return (status);
+	}
+
+	/* If configured, initialize the AML debugger */
+
+	return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_terminate
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Shutdown the ACPI subsystem.  Release all resources.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_terminate (void)
+{
+
+	/* Terminate the AML Debuger if present */
+
+	acpi_gbl_db_terminate_threads = TRUE;
+	acpi_cm_release_mutex (ACPI_MTX_DEBUG_CMD_READY);
+
+
+	/* Shutdown and free all resources */
+
+	acpi_cm_subsystem_shutdown ();
+
+
+	/* Free the mutex objects */
+
+	acpi_cm_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;
+
+
+	/*
+	 *  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;
+
+	/* TBD [Future]: need a version number, or use the version string */
+	info_ptr->acpi_ca_version   = 0x1234;
+
+	/* System flags (ACPI capabilities) */
+
+	info_ptr->flags             = acpi_gbl_system_flags;
+
+	/* Timer resolution - 24 or 32 bits  */
+
+	info_ptr->timer_resolution  = acpi_hw_pmt_resolution ();
+
+	/* 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;
+	char                    *formatted_exception;
+
+
+	/*
+	 *  Must have a valid buffer
+	 */
+	if ((!out_buffer)         ||
+		(!out_buffer->pointer))
+	{
+		return (AE_BAD_PARAMETER);
+	}
+
+
+	/* Exception must be within range */
+
+	if (exception > ACPI_MAX_STATUS) {
+		return (AE_BAD_PARAMETER);
+	}
+
+
+	/* Convert the exception code */
+
+	formatted_exception = acpi_cm_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);
+}
+