/* * 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>#include <acpi/acglobal.h> #define _COMPONENT		ACPI_SYSTEM_COMPONENTACPI_MODULE_NAME		("debug") #define ACPI_SYSTEM_FILE_DEBUG_LAYER	"debug_layer"#define ACPI_SYSTEM_FILE_DEBUG_LEVEL	"debug_level" #ifdef MODULE_PARAM_PREFIX#undef MODULE_PARAM_PREFIX#endif #define MODULE_PARAM_PREFIXmodule_param(acpi_dbg_layer, uint, 0400);module_param(acpi_dbg_level, uint, 0400); 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),}; static const struct acpi_dlevel acpi_debug_levels[] ={	ACPI_DEBUG_INIT(ACPI_LV_ERROR),	ACPI_DEBUG_INIT(ACPI_LV_WARN),	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),             }; static intacpi_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 intacpi_system_write_debug (	struct file             *file,        const char              __user *buffer,	unsigned long           count,        void                    *data){	char			debug_string[12] = {'\0'}; 	ACPI_FUNCTION_TRACE("acpi_system_write_debug"); 	if (count > sizeof(debug_string) - 1)		return_VALUE(-EINVAL); 	if (copy_from_user(debug_string, buffer, count))		return_VALUE(-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_VALUE(-EINVAL);	} 	return_VALUE(count);} static int __init acpi_debug_init(void){	struct proc_dir_entry	*entry;	int error = 0;	char * name; 	ACPI_FUNCTION_TRACE("acpi_debug_init"); 	if (acpi_disabled)		return_VALUE(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_VALUE(error);  Error:	ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 			 "Unable to create '%s' proc fs entry\n", name)); 	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);	error = -EFAULT;	goto Done;} subsys_initcall(acpi_debug_init);