1 files changed, 113 insertions, 0 deletions

diff --git a/include/linux/kdb.h b/include/linux/kdb.h
new file mode 100644
index 000000000000..4d93790faec3
--- /dev/null
+++ b/include/linux/kdb.h
@@ -0,0 +1,113 @@
+#ifndef _KDB_H
+#define _KDB_H
+
+/*
+ * Kernel Debugger Architecture Independent Global Headers
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2000-2007 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (C) 2000 Stephane Eranian <eranian@hpl.hp.com>
+ * Copyright (C) 2009 Jason Wessel <jason.wessel@windriver.com>
+ */
+
+#ifdef  CONFIG_KGDB_KDB
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <asm/atomic.h>
+
+#define KDB_POLL_FUNC_MAX       5
+
+/*
+ * kdb_initial_cpu is initialized to -1, and is set to the cpu
+ * number whenever the kernel debugger is entered.
+ */
+extern int kdb_initial_cpu;
+extern atomic_t kdb_event;
+
+/*
+ * kdb_diemsg
+ *
+ *      Contains a pointer to the last string supplied to the
+ *      kernel 'die' panic function.
+ */
+extern const char *kdb_diemsg;
+
+#define KDB_FLAG_EARLYKDB       (1 << 0) /* set from boot parameter kdb=early */
+#define KDB_FLAG_CATASTROPHIC   (1 << 1) /* A catastrophic event has occurred */
+#define KDB_FLAG_CMD_INTERRUPT  (1 << 2) /* Previous command was interrupted */
+#define KDB_FLAG_NOIPI          (1 << 3) /* Do not send IPIs */
+#define KDB_FLAG_ONLY_DO_DUMP   (1 << 4) /* Only do a dump, used when
+                                          * kdb is off */
+#define KDB_FLAG_NO_CONSOLE     (1 << 5) /* No console is available,
+                                          * kdb is disabled */
+#define KDB_FLAG_NO_VT_CONSOLE  (1 << 6) /* No VT console is available, do
+                                          * not use keyboard */
+#define KDB_FLAG_NO_I8042       (1 << 7) /* No i8042 chip is available, do
+                                          * not use keyboard */
+
+extern int kdb_flags;   /* Global flags, see kdb_state for per cpu state */
+
+extern void kdb_save_flags(void);
+extern void kdb_restore_flags(void);
+
+#define KDB_FLAG(flag)          (kdb_flags & KDB_FLAG_##flag)
+#define KDB_FLAG_SET(flag)      ((void)(kdb_flags |= KDB_FLAG_##flag))
+#define KDB_FLAG_CLEAR(flag)    ((void)(kdb_flags &= ~KDB_FLAG_##flag))
+
+/*
+ * External entry point for the kernel debugger.  The pt_regs
+ * at the time of entry are supplied along with the reason for
+ * entry to the kernel debugger.
+ */
+
+typedef enum {
+        KDB_REASON_ENTER = 1,   /* KDB_ENTER() trap/fault - regs valid */
+        KDB_REASON_ENTER_SLAVE, /* KDB_ENTER_SLAVE() trap/fault - regs valid */
+        KDB_REASON_BREAK,       /* Breakpoint inst. - regs valid */
+        KDB_REASON_DEBUG,       /* Debug Fault - regs valid */
+        KDB_REASON_OOPS,        /* Kernel Oops - regs valid */
+        KDB_REASON_SWITCH,      /* CPU switch - regs valid*/
+        KDB_REASON_KEYBOARD,    /* Keyboard entry - regs valid */
+        KDB_REASON_NMI,         /* Non-maskable interrupt; regs valid */
+        KDB_REASON_RECURSE,     /* Recursive entry to kdb;
+                                 * regs probably valid */
+        KDB_REASON_SSTEP,       /* Single Step trap. - regs valid */
+} kdb_reason_t;
+
+extern int kdb_printf(const char *, ...)
+            __attribute__ ((format (printf, 1, 2)));
+typedef int (*kdb_printf_t)(const char *, ...)
+             __attribute__ ((format (printf, 1, 2)));
+
+extern void kdb_init(int level);
+
+/* Access to kdb specific polling devices */
+typedef int (*get_char_func)(void);
+extern get_char_func kdb_poll_funcs[];
+extern int kdb_get_kbd_char(void);
+
+static inline
+int kdb_process_cpu(const struct task_struct *p)
+{
+        unsigned int cpu = task_thread_info(p)->cpu;
+        if (cpu > num_possible_cpus())
+                cpu = 0;
+        return cpu;
+}
+
+/* kdb access to register set for stack dumping */
+extern struct pt_regs *kdb_current_regs;
+
+#else /* ! CONFIG_KGDB_KDB */
+#define kdb_printf(...)
+#define kdb_init(x)
+#endif  /* CONFIG_KGDB_KDB */
+enum {
+        KDB_NOT_INITIALIZED,
+        KDB_INIT_EARLY,
+        KDB_INIT_FULL,
+};
+#endif  /* !_KDB_H */