utdebug.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

/******************************************************************************
 *
 * Module Name: utdebug - Debug print routines
 *              $Revision: 90 $
 *
 *****************************************************************************/

/*
 *  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"

#define _COMPONENT          ACPI_UTILITIES
	 MODULE_NAME         ("utdebug")


u32             acpi_gbl_prev_thread_id = 0xFFFFFFFF;
char            *acpi_gbl_fn_entry_str = "----Entry";
char            *acpi_gbl_fn_exit_str = "----Exit-";


#ifdef ACPI_DEBUG


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ut_init_stack_ptr_trace
 *
 * PARAMETERS:  None
 *
 * RETURN:      None
 *
 * DESCRIPTION: Save the current stack pointer
 *
 ****************************************************************************/

void
acpi_ut_init_stack_ptr_trace (
	void)
{
	u32                 current_sp;


	acpi_gbl_entry_stack_pointer = (u32) &current_sp;
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ut_track_stack_ptr
 *
 * PARAMETERS:  None
 *
 * RETURN:      None
 *
 * DESCRIPTION: Save the current stack pointer
 *
 ****************************************************************************/

void
acpi_ut_track_stack_ptr (
	void)
{
	u32                 current_sp;

	current_sp = (u32) &current_sp;

	if (current_sp < acpi_gbl_lowest_stack_pointer) {
		acpi_gbl_lowest_stack_pointer = current_sp;
	}

	if (acpi_gbl_nesting_level > acpi_gbl_deepest_nesting) {
		acpi_gbl_deepest_nesting = acpi_gbl_nesting_level;
	}
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ut_debug_print
 *
 * PARAMETERS:  Debug_level         - Requested debug print level
 *              Proc_name           - Caller's procedure name
 *              Module_name         - Caller's module name (for error output)
 *              Line_number         - Caller's line number (for error output)
 *              Component_id        - Caller's component ID (for error output)
 *
 *              Format              - Printf format field
 *              ...                 - Optional printf arguments
 *
 * RETURN:      None
 *
 * DESCRIPTION: Print error message with prefix consisting of the module name,
 *              line number, and component ID.
 *
 ****************************************************************************/

void
acpi_ut_debug_print (
	u32                     requested_debug_level,
	u32                     line_number,
	acpi_debug_print_info   *dbg_info,
	char                    *format,
	...)
{
	u32                     thread_id;
	va_list                 args;


	/*
	 * Stay silent if the debug level or component ID is disabled
	 */
	if (!(requested_debug_level & acpi_dbg_level) ||
		!(dbg_info->component_id & acpi_dbg_layer)) {
		return;
	}


	/*
	 * Thread tracking and context switch notification
	 */
	thread_id = acpi_os_get_thread_id ();

	if (thread_id != acpi_gbl_prev_thread_id) {
		if (ACPI_LV_THREADS & acpi_dbg_level) {
			acpi_os_printf ("\n**** Context Switch from TID %X to TID %X ****\n\n",
				acpi_gbl_prev_thread_id, thread_id);
		}

		acpi_gbl_prev_thread_id = thread_id;
	}

	/*
	 * Display the module name, current line number, thread ID (if requested),
	 * current procedure nesting level, and the current procedure name
	 */
	acpi_os_printf ("%8s-%04d ", dbg_info->module_name, line_number);

	if (ACPI_LV_THREADS & acpi_dbg_level) {
		acpi_os_printf ("[%04X] ", thread_id, acpi_gbl_nesting_level, dbg_info->proc_name);
	}

	acpi_os_printf ("[%02d] %-22.22s: ", acpi_gbl_nesting_level, dbg_info->proc_name);


	va_start (args, format);
	acpi_os_vprintf (format, args);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ut_debug_print_raw
 *
 * PARAMETERS:  Requested_debug_level - Requested debug print level
 *              Line_number         - Caller's line number
 *              Dbg_info            - Contains:
 *                  Proc_name           - Caller's procedure name
 *                  Module_name         - Caller's module name
 *                  Component_id        - Caller's component ID
 *              Format              - Printf format field
 *              ...                 - Optional printf arguments
 *
 * RETURN:      None
 *
 * DESCRIPTION: Print message with no headers.  Has same interface as
 *              Debug_print so that the same macros can be used.
 *
 ****************************************************************************/

void
acpi_ut_debug_print_raw (
	u32                     requested_debug_level,
	u32                     line_number,
	acpi_debug_print_info   *dbg_info,
	char                    *format,
	...)
{
	va_list                 args;


	if (!(requested_debug_level & acpi_dbg_level) ||
		!(dbg_info->component_id & acpi_dbg_layer)) {
		return;
	}

	va_start (args, format);

	acpi_os_vprintf (format, args);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ut_trace
 *
 * PARAMETERS:  Line_number         - Caller's line number
 *              Dbg_info            - Contains:
 *                  Proc_name           - Caller's procedure name
 *                  Module_name         - Caller's module name
 *                  Component_id        - Caller's component ID
 *
 * RETURN:      None
 *
 * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 *              set in Debug_level
 *
 ****************************************************************************/

void
acpi_ut_trace (
	u32                     line_number,
	acpi_debug_print_info   *dbg_info)
{

	acpi_gbl_nesting_level++;
	acpi_ut_track_stack_ptr ();

	acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
			"%s\n", acpi_gbl_fn_entry_str);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ut_trace_ptr
 *
 * PARAMETERS:  Line_number         - Caller's line number
 *              Dbg_info            - Contains:
 *                  Proc_name           - Caller's procedure name
 *                  Module_name         - Caller's module name
 *                  Component_id        - Caller's component ID
 *              Pointer             - Pointer to display
 *
 * RETURN:      None
 *
 * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 *              set in Debug_level
 *
 ****************************************************************************/

void
acpi_ut_trace_ptr (
	u32                     line_number,
	acpi_debug_print_info   *dbg_info,
	void                    *pointer)
{
	acpi_gbl_nesting_level++;
	acpi_ut_track_stack_ptr ();

	acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
			"%s %p\n", acpi_gbl_fn_entry_str, pointer);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ut_trace_str
 *
 * PARAMETERS:  Line_number         - Caller's line number
 *              Dbg_info            - Contains:
 *                  Proc_name           - Caller's procedure name
 *                  Module_name         - Caller's module name
 *                  Component_id        - Caller's component ID
 *              String              - Additional string to display
 *
 * RETURN:      None
 *
 * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 *              set in Debug_level
 *
 ****************************************************************************/

void
acpi_ut_trace_str (
	u32                     line_number,
	acpi_debug_print_info   *dbg_info,
	NATIVE_CHAR             *string)
{

	acpi_gbl_nesting_level++;
	acpi_ut_track_stack_ptr ();

	acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
			"%s %s\n", acpi_gbl_fn_entry_str, string);
}