[linux-2.6-block.git] / drivers / acpi / debug.c

/*
 * debug.c - ACPI debug interface to userspace.
 */

#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <asm/uaccess.h>
#include <acpi/acpi_drivers.h>

#define _COMPONENT		ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("debug");

#ifdef MODULE_PARAM_PREFIX
#undef MODULE_PARAM_PREFIX
#endif
#define MODULE_PARAM_PREFIX "acpi."

struct acpi_dlayer {
	const char *name;
	unsigned long value;
};
struct acpi_dlevel {
	const char *name;
	unsigned long value;
};
#define ACPI_DEBUG_INIT(v)	{ .name = #v, .value = v }

static const struct acpi_dlayer acpi_debug_layers[] = {
	ACPI_DEBUG_INIT(ACPI_UTILITIES),
	ACPI_DEBUG_INIT(ACPI_HARDWARE),
	ACPI_DEBUG_INIT(ACPI_EVENTS),
	ACPI_DEBUG_INIT(ACPI_TABLES),
	ACPI_DEBUG_INIT(ACPI_NAMESPACE),
	ACPI_DEBUG_INIT(ACPI_PARSER),
	ACPI_DEBUG_INIT(ACPI_DISPATCHER),
	ACPI_DEBUG_INIT(ACPI_EXECUTER),
	ACPI_DEBUG_INIT(ACPI_RESOURCES),
	ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
	ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
	ACPI_DEBUG_INIT(ACPI_COMPILER),
	ACPI_DEBUG_INIT(ACPI_TOOLS),

	ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
};

static const struct acpi_dlevel acpi_debug_levels[] = {
	ACPI_DEBUG_INIT(ACPI_LV_INIT),
	ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
	ACPI_DEBUG_INIT(ACPI_LV_INFO),

	ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
	ACPI_DEBUG_INIT(ACPI_LV_PARSE),
	ACPI_DEBUG_INIT(ACPI_LV_LOAD),
	ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
	ACPI_DEBUG_INIT(ACPI_LV_EXEC),
	ACPI_DEBUG_INIT(ACPI_LV_NAMES),
	ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
	ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
	ACPI_DEBUG_INIT(ACPI_LV_TABLES),
	ACPI_DEBUG_INIT(ACPI_LV_VALUES),
	ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
	ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
	ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
	ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),

	ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
	ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
	ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),

	ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
	ACPI_DEBUG_INIT(ACPI_LV_THREADS),
	ACPI_DEBUG_INIT(ACPI_LV_IO),
	ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),

	ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
	ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
	ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
	ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
};

/* --------------------------------------------------------------------------
                              FS Interface (/sys)
   -------------------------------------------------------------------------- */
static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
	int result = 0;
	int i;

	result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");

	for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
		result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
					acpi_debug_layers[i].name,
					acpi_debug_layers[i].value,
					(acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
	}
	result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
					ACPI_ALL_DRIVERS,
					(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
					ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
					ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
	result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);

	return result;
}

static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
	int result = 0;
	int i;

	result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");

	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
		result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
				     acpi_debug_levels[i].name,
				     acpi_debug_levels[i].value,
				     (acpi_dbg_level & acpi_debug_levels[i].
				      value) ? '*' : ' ');
	}
	result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
			     acpi_dbg_level);

	return result;
}

module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);

static char trace_method_name[6];
module_param_string(trace_method_name, trace_method_name, 6, 0644);
static unsigned int trace_debug_layer;
module_param(trace_debug_layer, uint, 0644);
static unsigned int trace_debug_level;
module_param(trace_debug_level, uint, 0644);

static int param_set_trace_state(const char *val, struct kernel_param *kp)
{
	int result = 0;

	if (!strncmp(val, "enable", strlen("enable") - 1)) {
		result = acpi_debug_trace(trace_method_name, trace_debug_level,
					  trace_debug_layer, 0);
		if (result)
			result = -EBUSY;
		goto exit;
	}

	if (!strncmp(val, "disable", strlen("disable") - 1)) {
		int name = 0;
		result = acpi_debug_trace((char *)&name, trace_debug_level,
					  trace_debug_layer, 0);
		if (result)
			result = -EBUSY;
		goto exit;
	}

	if (!strncmp(val, "1", 1)) {
		result = acpi_debug_trace(trace_method_name, trace_debug_level,
					  trace_debug_layer, 1);
		if (result)
			result = -EBUSY;
		goto exit;
	}

	result = -EINVAL;
exit:
	return result;
}

static int param_get_trace_state(char *buffer, struct kernel_param *kp)
{
	if (!acpi_gbl_trace_method_name)
		return sprintf(buffer, "disable");
	else {
		if (acpi_gbl_trace_flags & 1)
			return sprintf(buffer, "1");
		else
			return sprintf(buffer, "enable");
	}
	return 0;
}

module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
		  NULL, 0644);

/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */
#ifdef CONFIG_ACPI_PROCFS
#define ACPI_SYSTEM_FILE_DEBUG_LAYER	"debug_layer"
#define ACPI_SYSTEM_FILE_DEBUG_LEVEL		"debug_level"

static int
acpi_system_read_debug(char *page,
		       char **start, off_t off, int count, int *eof, void *data)
{
	char *p = page;
	int size = 0;
	unsigned int i;

	if (off != 0)
		goto end;

	p += sprintf(p, "%-25s\tHex        SET\n", "Description");

	switch ((unsigned long)data) {
	case 0:
		for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
			p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
				     acpi_debug_layers[i].name,
				     acpi_debug_layers[i].value,
				     (acpi_dbg_layer & acpi_debug_layers[i].
				      value) ? '*' : ' ');
		}
		p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
			     ACPI_ALL_DRIVERS,
			     (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
			     ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
						       ACPI_ALL_DRIVERS) ==
			     0 ? ' ' : '-');
		p += sprintf(p,
			     "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
			     acpi_dbg_layer);
		break;
	case 1:
		for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
			p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
				     acpi_debug_levels[i].name,
				     acpi_debug_levels[i].value,
				     (acpi_dbg_level & acpi_debug_levels[i].
				      value) ? '*' : ' ');
		}
		p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
			     acpi_dbg_level);
		break;
	default:
		p += sprintf(p, "Invalid debug option\n");
		break;
	}

      end:
	size = (p - page);
	if (size <= off + count)
		*eof = 1;
	*start = page + off;
	size -= off;
	if (size > count)
		size = count;
	if (size < 0)
		size = 0;

	return size;
}

static int
acpi_system_write_debug(struct file *file,
			const char __user * buffer,
			unsigned long count, void *data)
{
	char debug_string[12] = { '\0' };


	if (count > sizeof(debug_string) - 1)
		return -EINVAL;

	if (copy_from_user(debug_string, buffer, count))
		return -EFAULT;

	debug_string[count] = '\0';

	switch ((unsigned long)data) {
	case 0:
		acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
		break;
	case 1:
		acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
		break;
	default:
		return -EINVAL;
	}

	return count;
}

static int __init acpi_debug_init(void)
{
	struct proc_dir_entry *entry;
	int error = 0;
	char *name;


	if (acpi_disabled)
		return 0;

	/* 'debug_layer' [R/W] */
	name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
	entry =
	    create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
				   acpi_root_dir, acpi_system_read_debug,
				   (void *)0);
	if (entry)
		entry->write_proc = acpi_system_write_debug;
	else
		goto Error;

	/* 'debug_level' [R/W] */
	name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
	entry =
	    create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
				   acpi_root_dir, acpi_system_read_debug,
				   (void *)1);
	if (entry)
		entry->write_proc = acpi_system_write_debug;
	else
		goto Error;

      Done:
	return error;

      Error:
	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
	error = -ENODEV;
	goto Done;
}

subsys_initcall(acpi_debug_init);
#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* debug.c - ACPI debug interface to userspace.
	3	*/
	4
	5	#include <linux/proc_fs.h>
	6	#include <linux/init.h>
	7	#include <linux/module.h>
	8	#include <linux/kernel.h>
	9	#include <linux/moduleparam.h>
	10	#include <asm/uaccess.h>
	11	#include <acpi/acpi_drivers.h>
1da177e4 LT	12
1da177e4 LT	13	#define _COMPONENT ACPI_SYSTEM_COMPONENT
f52fd66d	14	ACPI_MODULE_NAME("debug");
219c3c8e	15
1da177e4 LT	16	#ifdef MODULE_PARAM_PREFIX
	17	#undef MODULE_PARAM_PREFIX
	18	#endif
219c3c8e	19	#define MODULE_PARAM_PREFIX "acpi."
1da177e4 LT	20
	21	struct acpi_dlayer {
	22	const char *name;
	23	unsigned long value;
	24	};
	25	struct acpi_dlevel {
	26	const char *name;
	27	unsigned long value;
	28	};
	29	#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
	30
4be44fcd	31	static const struct acpi_dlayer acpi_debug_layers[] = {
1da177e4 LT	32	ACPI_DEBUG_INIT(ACPI_UTILITIES),
	33	ACPI_DEBUG_INIT(ACPI_HARDWARE),
	34	ACPI_DEBUG_INIT(ACPI_EVENTS),
	35	ACPI_DEBUG_INIT(ACPI_TABLES),
	36	ACPI_DEBUG_INIT(ACPI_NAMESPACE),
	37	ACPI_DEBUG_INIT(ACPI_PARSER),
	38	ACPI_DEBUG_INIT(ACPI_DISPATCHER),
	39	ACPI_DEBUG_INIT(ACPI_EXECUTER),
	40	ACPI_DEBUG_INIT(ACPI_RESOURCES),
	41	ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
	42	ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
	43	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
	44	ACPI_DEBUG_INIT(ACPI_COMPILER),
	45	ACPI_DEBUG_INIT(ACPI_TOOLS),
bdd72799 BH	46
	47	ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
	48	ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
	49	ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
	50	ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
	51	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
	52	ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
	53	ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
	54	ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
	55	ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
	56	ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
	57	ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
	58	ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
	59	ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
	60	ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
1da177e4 LT	61	};
1da177e4 LT	62
4be44fcd	63	static const struct acpi_dlevel acpi_debug_levels[] = {
1da177e4 LT	64	ACPI_DEBUG_INIT(ACPI_LV_INIT),
	65	ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
	66	ACPI_DEBUG_INIT(ACPI_LV_INFO),
	67
	68	ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
	69	ACPI_DEBUG_INIT(ACPI_LV_PARSE),
	70	ACPI_DEBUG_INIT(ACPI_LV_LOAD),
	71	ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
	72	ACPI_DEBUG_INIT(ACPI_LV_EXEC),
	73	ACPI_DEBUG_INIT(ACPI_LV_NAMES),
	74	ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
	75	ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
	76	ACPI_DEBUG_INIT(ACPI_LV_TABLES),
	77	ACPI_DEBUG_INIT(ACPI_LV_VALUES),
	78	ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
	79	ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
	80	ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
	81	ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
	82
	83	ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
	84	ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
	85	ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
	86
	87	ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
	88	ACPI_DEBUG_INIT(ACPI_LV_THREADS),
	89	ACPI_DEBUG_INIT(ACPI_LV_IO),
	90	ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
	91
	92	ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
	93	ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
	94	ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
4be44fcd	95	ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
1da177e4 LT	96	};
1da177e4 LT	97
219c3c8e ZR	98	/* --------------------------------------------------------------------------
	99	FS Interface (/sys)
	100	-------------------------------------------------------------------------- */
	101	static int param_get_debug_layer(char buffer, struct kernel_param kp) {
	102	int result = 0;
	103	int i;
	104
	105	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	106
	107	for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
	108	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	109	acpi_debug_layers[i].name,
	110	acpi_debug_layers[i].value,
	111	(acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
	112	}
	113	result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
	114	ACPI_ALL_DRIVERS,
	115	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	116	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	117	ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
	118	result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
	119
	120	return result;
	121	}
	122
	123	static int param_get_debug_level(char buffer, struct kernel_param kp) {
	124	int result = 0;
	125	int i;
	126
	127	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	128
	129	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
	130	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	131	acpi_debug_levels[i].name,
	132	acpi_debug_levels[i].value,
	133	(acpi_dbg_level & acpi_debug_levels[i].
	134	value) ? '*' : ' ');
	135	}
	136	result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
	137	acpi_dbg_level);
	138
	139	return result;
	140	}
	141
	142	module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
	143	module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
	144
4169c45f ZR	145	static char trace_method_name[6];
	146	module_param_string(trace_method_name, trace_method_name, 6, 0644);
	147	static unsigned int trace_debug_layer;
	148	module_param(trace_debug_layer, uint, 0644);
	149	static unsigned int trace_debug_level;
	150	module_param(trace_debug_level, uint, 0644);
	151
	152	static int param_set_trace_state(const char val, struct kernel_param kp)
	153	{
	154	int result = 0;
	155
	156	if (!strncmp(val, "enable", strlen("enable") - 1)) {
	157	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	158	trace_debug_layer, 0);
	159	if (result)
	160	result = -EBUSY;
	161	goto exit;
	162	}
	163
	164	if (!strncmp(val, "disable", strlen("disable") - 1)) {
	165	int name = 0;
	166	result = acpi_debug_trace((char *)&name, trace_debug_level,
	167	trace_debug_layer, 0);
	168	if (result)
	169	result = -EBUSY;
	170	goto exit;
	171	}
	172
	173	if (!strncmp(val, "1", 1)) {
	174	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	175	trace_debug_layer, 1);
	176	if (result)
	177	result = -EBUSY;
	178	goto exit;
	179	}
	180
	181	result = -EINVAL;
	182	exit:
	183	return result;
	184	}
	185
	186	static int param_get_trace_state(char buffer, struct kernel_param kp)
	187	{
	188	if (!acpi_gbl_trace_method_name)
	189	return sprintf(buffer, "disable");
	190	else {
	191	if (acpi_gbl_trace_flags & 1)
	192	return sprintf(buffer, "1");
	193	else
	194	return sprintf(buffer, "enable");
	195	}
	196	return 0;
	197	}
	198
	199	module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
	200	NULL, 0644);
	201
219c3c8e ZR	202	/* --------------------------------------------------------------------------
	203	FS Interface (/proc)
	204	-------------------------------------------------------------------------- */
	205	#ifdef CONFIG_ACPI_PROCFS
	206	#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
	207	#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
	208
1da177e4	209	static int
4be44fcd LB	210	acpi_system_read_debug(char *page,
4be44fcd LB	211	char *start, off_t off, int count, int eof, void *data)
1da177e4	212	{
4be44fcd LB	213	char *p = page;
	214	int size = 0;
	215	unsigned int i;
1da177e4 LT	216
	217	if (off != 0)
	218	goto end;
	219
	220	p += sprintf(p, "%-25s\tHex SET\n", "Description");
	221
4be44fcd	222	switch ((unsigned long)data) {
1da177e4 LT	223	case 0:
	224	for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
	225	p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	226	acpi_debug_layers[i].name,
	227	acpi_debug_layers[i].value,
	228	(acpi_dbg_layer & acpi_debug_layers[i].
	229	value) ? '*' : ' ');
1da177e4 LT	230	}
1da177e4 LT	231	p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
4be44fcd LB	232	ACPI_ALL_DRIVERS,
	233	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	234	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	235	ACPI_ALL_DRIVERS) ==
	236	0 ? ' ' : '-');
1da177e4	237	p += sprintf(p,
4be44fcd LB	238	"--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
4be44fcd LB	239	acpi_dbg_layer);
1da177e4 LT	240	break;
	241	case 1:
	242	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
	243	p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	244	acpi_debug_levels[i].name,
	245	acpi_debug_levels[i].value,
	246	(acpi_dbg_level & acpi_debug_levels[i].
	247	value) ? '*' : ' ');
1da177e4 LT	248	}
1da177e4 LT	249	p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
4be44fcd	250	acpi_dbg_level);
1da177e4 LT	251	break;
	252	default:
	253	p += sprintf(p, "Invalid debug option\n");
	254	break;
	255	}
4be44fcd LB	256
4be44fcd LB	257	end:
1da177e4	258	size = (p - page);
4be44fcd LB	259	if (size <= off + count)
4be44fcd LB	260	*eof = 1;
1da177e4 LT	261	*start = page + off;
1da177e4 LT	262	size -= off;
4be44fcd LB	263	if (size > count)
	264	size = count;
	265	if (size < 0)
	266	size = 0;
1da177e4 LT	267
	268	return size;
	269	}
	270
1da177e4	271	static int
4be44fcd LB	272	acpi_system_write_debug(struct file *file,
	273	const char __user * buffer,
	274	unsigned long count, void *data)
1da177e4	275	{
4be44fcd	276	char debug_string[12] = { '\0' };
1da177e4	277
1da177e4 LT	278
1da177e4 LT	279	if (count > sizeof(debug_string) - 1)
d550d98d	280	return -EINVAL;
1da177e4 LT	281
1da177e4 LT	282	if (copy_from_user(debug_string, buffer, count))
d550d98d	283	return -EFAULT;
1da177e4 LT	284
	285	debug_string[count] = '\0';
	286
4be44fcd	287	switch ((unsigned long)data) {
1da177e4 LT	288	case 0:
	289	acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
	290	break;
	291	case 1:
	292	acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
	293	break;
	294	default:
d550d98d	295	return -EINVAL;
1da177e4 LT	296	}
1da177e4 LT	297
d550d98d	298	return count;
1da177e4 LT	299	}
	300
	301	static int __init acpi_debug_init(void)
	302	{
4be44fcd	303	struct proc_dir_entry *entry;
1da177e4	304	int error = 0;
4be44fcd	305	char *name;
1da177e4	306
1da177e4 LT	307
1da177e4 LT	308	if (acpi_disabled)
d550d98d	309	return 0;
1da177e4 LT	310
	311	/* 'debug_layer' [R/W] */
	312	name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
4be44fcd LB	313	entry =
	314	create_proc_read_entry(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	315	acpi_root_dir, acpi_system_read_debug,
	316	(void *)0);
1da177e4 LT	317	if (entry)
	318	entry->write_proc = acpi_system_write_debug;
	319	else
	320	goto Error;
	321
	322	/* 'debug_level' [R/W] */
	323	name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
4be44fcd LB	324	entry =
	325	create_proc_read_entry(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	326	acpi_root_dir, acpi_system_read_debug,
	327	(void *)1);
	328	if (entry)
1da177e4 LT	329	entry->write_proc = acpi_system_write_debug;
	330	else
	331	goto Error;
	332
4be44fcd	333	Done:
d550d98d	334	return error;
1da177e4	335
4be44fcd	336	Error:
1da177e4 LT	337	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
1da177e4 LT	338	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
a6fc6720	339	error = -ENODEV;
1da177e4 LT	340	goto Done;
	341	}
	342
	343	subsys_initcall(acpi_debug_init);
219c3c8e	344	#endif