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/******************************************************************************
*
* Module Name: cmxface - External interfaces for "global" ACPI functions
* $Revision: 43 $
*
*****************************************************************************/
/*
* 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 "acevents.h"
#include "achware.h"
#include "acnamesp.h"
#include "acinterp.h"
#include "amlcode.h"
#include "acdebug.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 */
DEBUGGER_EXEC (acpi_db_initialize ());
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;
/* TBD: [Investigate] This is no longer needed?*/
/* 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;
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_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);
}
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