1 files changed, 233 insertions, 0 deletions

diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c
new file mode 100644
index 000000000000..2c0dac559f16
--- /dev/null
+++ b/drivers/acpi/debug.c
@@ -0,0 +1,233 @@
+/*
+ * 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_COMPONENT
+ACPI_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_PREFIX
+module_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 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'};
+
+        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);