[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / kgdb.h

/*
 * This provides the callbacks and functions that KGDB needs to share between
 * the core, I/O and arch-specific portions.
 *
 * Author: Amit Kale <amitkale@linsyssoft.com> and
 *         Tom Rini <trini@kernel.crashing.org>
 *
 * 2001-2004 (c) Amit S. Kale and 2003-2005 (c) MontaVista Software, Inc.
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */
#ifndef _KGDB_H_
#define _KGDB_H_

#include <linux/serial_8250.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/atomic.h>
#ifdef CONFIG_HAVE_ARCH_KGDB
#include <asm/kgdb.h>
#endif

#ifdef CONFIG_KGDB
struct pt_regs;

/**
 *	kgdb_skipexception - (optional) exit kgdb_handle_exception early
 *	@exception: Exception vector number
 *	@regs: Current &struct pt_regs.
 *
 *	On some architectures it is required to skip a breakpoint
 *	exception when it occurs after a breakpoint has been removed.
 *	This can be implemented in the architecture specific portion of kgdb.
 */
extern int kgdb_skipexception(int exception, struct pt_regs *regs);

struct tasklet_struct;
struct task_struct;
struct uart_port;

/**
 *	kgdb_breakpoint - compiled in breakpoint
 *
 *	This will be implemented as a static inline per architecture.  This
 *	function is called by the kgdb core to execute an architecture
 *	specific trap to cause kgdb to enter the exception processing.
 *
 */
void kgdb_breakpoint(void);

extern int kgdb_connected;
extern int kgdb_io_module_registered;

extern atomic_t			kgdb_setting_breakpoint;
extern atomic_t			kgdb_cpu_doing_single_step;

extern struct task_struct	*kgdb_usethread;
extern struct task_struct	*kgdb_contthread;

enum kgdb_bptype {
	BP_BREAKPOINT = 0,
	BP_HARDWARE_BREAKPOINT,
	BP_WRITE_WATCHPOINT,
	BP_READ_WATCHPOINT,
	BP_ACCESS_WATCHPOINT,
	BP_POKE_BREAKPOINT,
};

enum kgdb_bpstate {
	BP_UNDEFINED = 0,
	BP_REMOVED,
	BP_SET,
	BP_ACTIVE
};

struct kgdb_bkpt {
	unsigned long		bpt_addr;
	unsigned char		saved_instr[BREAK_INSTR_SIZE];
	enum kgdb_bptype	type;
	enum kgdb_bpstate	state;
};

struct dbg_reg_def_t {
	char *name;
	int size;
	int offset;
};

#ifndef DBG_MAX_REG_NUM
#define DBG_MAX_REG_NUM 0
#else
extern struct dbg_reg_def_t dbg_reg_def[];
extern char *dbg_get_reg(int regno, void *mem, struct pt_regs *regs);
extern int dbg_set_reg(int regno, void *mem, struct pt_regs *regs);
#endif
#ifndef KGDB_MAX_BREAKPOINTS
# define KGDB_MAX_BREAKPOINTS	1000
#endif

#define KGDB_HW_BREAKPOINT	1

/*
 * Functions each KGDB-supporting architecture must provide:
 */

/**
 *	kgdb_arch_init - Perform any architecture specific initalization.
 *
 *	This function will handle the initalization of any architecture
 *	specific callbacks.
 */
extern int kgdb_arch_init(void);

/**
 *	kgdb_arch_exit - Perform any architecture specific uninitalization.
 *
 *	This function will handle the uninitalization of any architecture
 *	specific callbacks, for dynamic registration and unregistration.
 */
extern void kgdb_arch_exit(void);

/**
 *	pt_regs_to_gdb_regs - Convert ptrace regs to GDB regs
 *	@gdb_regs: A pointer to hold the registers in the order GDB wants.
 *	@regs: The &struct pt_regs of the current process.
 *
 *	Convert the pt_regs in @regs into the format for registers that
 *	GDB expects, stored in @gdb_regs.
 */
extern void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs);

/**
 *	sleeping_thread_to_gdb_regs - Convert ptrace regs to GDB regs
 *	@gdb_regs: A pointer to hold the registers in the order GDB wants.
 *	@p: The &struct task_struct of the desired process.
 *
 *	Convert the register values of the sleeping process in @p to
 *	the format that GDB expects.
 *	This function is called when kgdb does not have access to the
 *	&struct pt_regs and therefore it should fill the gdb registers
 *	@gdb_regs with what has	been saved in &struct thread_struct
 *	thread field during switch_to.
 */
extern void
sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p);

/**
 *	gdb_regs_to_pt_regs - Convert GDB regs to ptrace regs.
 *	@gdb_regs: A pointer to hold the registers we've received from GDB.
 *	@regs: A pointer to a &struct pt_regs to hold these values in.
 *
 *	Convert the GDB regs in @gdb_regs into the pt_regs, and store them
 *	in @regs.
 */
extern void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs);

/**
 *	kgdb_arch_handle_exception - Handle architecture specific GDB packets.
 *	@vector: The error vector of the exception that happened.
 *	@signo: The signal number of the exception that happened.
 *	@err_code: The error code of the exception that happened.
 *	@remcom_in_buffer: The buffer of the packet we have read.
 *	@remcom_out_buffer: The buffer of %BUFMAX bytes to write a packet into.
 *	@regs: The &struct pt_regs of the current process.
 *
 *	This function MUST handle the 'c' and 's' command packets,
 *	as well packets to set / remove a hardware breakpoint, if used.
 *	If there are additional packets which the hardware needs to handle,
 *	they are handled here.  The code should return -1 if it wants to
 *	process more packets, and a %0 or %1 if it wants to exit from the
 *	kgdb callback.
 */
extern int
kgdb_arch_handle_exception(int vector, int signo, int err_code,
			   char *remcom_in_buffer,
			   char *remcom_out_buffer,
			   struct pt_regs *regs);

/**
 *	kgdb_roundup_cpus - Get other CPUs into a holding pattern
 *	@flags: Current IRQ state
 *
 *	On SMP systems, we need to get the attention of the other CPUs
 *	and get them into a known state.  This should do what is needed
 *	to get the other CPUs to call kgdb_wait(). Note that on some arches,
 *	the NMI approach is not used for rounding up all the CPUs. For example,
 *	in case of MIPS, smp_call_function() is used to roundup CPUs. In
 *	this case, we have to make sure that interrupts are enabled before
 *	calling smp_call_function(). The argument to this function is
 *	the flags that will be used when restoring the interrupts. There is
 *	local_irq_save() call before kgdb_roundup_cpus().
 *
 *	On non-SMP systems, this is not called.
 */
extern void kgdb_roundup_cpus(unsigned long flags);

/**
 *	kgdb_arch_set_pc - Generic call back to the program counter
 *	@regs: Current &struct pt_regs.
 *  @pc: The new value for the program counter
 *
 *	This function handles updating the program counter and requires an
 *	architecture specific implementation.
 */
extern void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc);


/* Optional functions. */
extern int kgdb_validate_break_address(unsigned long addr);
extern int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt);
extern int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt);

/**
 *	kgdb_arch_late - Perform any architecture specific initalization.
 *
 *	This function will handle the late initalization of any
 *	architecture specific callbacks.  This is an optional function for
 *	handling things like late initialization of hw breakpoints.  The
 *	default implementation does nothing.
 */
extern void kgdb_arch_late(void);


/**
 * struct kgdb_arch - Describe architecture specific values.
 * @gdb_bpt_instr: The instruction to trigger a breakpoint.
 * @flags: Flags for the breakpoint, currently just %KGDB_HW_BREAKPOINT.
 * @set_breakpoint: Allow an architecture to specify how to set a software
 * breakpoint.
 * @remove_breakpoint: Allow an architecture to specify how to remove a
 * software breakpoint.
 * @set_hw_breakpoint: Allow an architecture to specify how to set a hardware
 * breakpoint.
 * @remove_hw_breakpoint: Allow an architecture to specify how to remove a
 * hardware breakpoint.
 * @disable_hw_break: Allow an architecture to specify how to disable
 * hardware breakpoints for a single cpu.
 * @remove_all_hw_break: Allow an architecture to specify how to remove all
 * hardware breakpoints.
 * @correct_hw_break: Allow an architecture to specify how to correct the
 * hardware debug registers.
 */
struct kgdb_arch {
	unsigned char		gdb_bpt_instr[BREAK_INSTR_SIZE];
	unsigned long		flags;

	int	(*set_breakpoint)(unsigned long, char *);
	int	(*remove_breakpoint)(unsigned long, char *);
	int	(*set_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
	int	(*remove_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
	void	(*disable_hw_break)(struct pt_regs *regs);
	void	(*remove_all_hw_break)(void);
	void	(*correct_hw_break)(void);
};

/**
 * struct kgdb_io - Describe the interface for an I/O driver to talk with KGDB.
 * @name: Name of the I/O driver.
 * @read_char: Pointer to a function that will return one char.
 * @write_char: Pointer to a function that will write one char.
 * @flush: Pointer to a function that will flush any pending writes.
 * @init: Pointer to a function that will initialize the device.
 * @pre_exception: Pointer to a function that will do any prep work for
 * the I/O driver.
 * @post_exception: Pointer to a function that will do any cleanup work
 * for the I/O driver.
 * @is_console: 1 if the end device is a console 0 if the I/O device is
 * not a console
 */
struct kgdb_io {
	const char		*name;
	int			(*read_char) (void);
	void			(*write_char) (u8);
	void			(*flush) (void);
	int			(*init) (void);
	void			(*pre_exception) (void);
	void			(*post_exception) (void);
	int			is_console;
};

extern struct kgdb_arch		arch_kgdb_ops;

extern unsigned long __weak kgdb_arch_pc(int exception, struct pt_regs *regs);

extern int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops);
extern void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops);
extern struct kgdb_io *dbg_io_ops;

extern int kgdb_hex2long(char **ptr, unsigned long *long_val);
extern char *kgdb_mem2hex(char *mem, char *buf, int count);
extern int kgdb_hex2mem(char *buf, char *mem, int count);

extern int kgdb_isremovedbreak(unsigned long addr);
extern void kgdb_schedule_breakpoint(void);

extern int
kgdb_handle_exception(int ex_vector, int signo, int err_code,
		      struct pt_regs *regs);
extern int kgdb_nmicallback(int cpu, void *regs);
extern void gdbstub_exit(int status);

extern int			kgdb_single_step;
extern atomic_t			kgdb_active;
#define in_dbg_master() \
	(raw_smp_processor_id() == atomic_read(&kgdb_active))
extern bool dbg_is_early;
extern void __init dbg_late_init(void);
#else /* ! CONFIG_KGDB */
#define in_dbg_master() (0)
#define dbg_late_init()
#endif /* ! CONFIG_KGDB */
#endif /* _KGDB_H_ */
Commit	Line	Data
dc7d5527 JW	1	/*
	2	* This provides the callbacks and functions that KGDB needs to share between
	3	* the core, I/O and arch-specific portions.
	4	*
	5	* Author: Amit Kale <amitkale@linsyssoft.com> and
	6	* Tom Rini <trini@kernel.crashing.org>
	7	*
	8	* 2001-2004 (c) Amit S. Kale and 2003-2005 (c) MontaVista Software, Inc.
	9	* This file is licensed under the terms of the GNU General Public License
	10	* version 2. This program is licensed "as is" without any warranty of any
	11	* kind, whether express or implied.
	12	*/
	13	#ifndef _KGDB_H_
	14	#define _KGDB_H_
	15
	16	#include <linux/serial_8250.h>
	17	#include <linux/linkage.h>
	18	#include <linux/init.h>
60063497	19	#include <linux/atomic.h>
dcc78711	20	#ifdef CONFIG_HAVE_ARCH_KGDB
dc7d5527	21	#include <asm/kgdb.h>
dcc78711	22	#endif
dc7d5527	23
dcc78711	24	#ifdef CONFIG_KGDB
dc7d5527 JW	25	struct pt_regs;
dc7d5527 JW	26
e3e2aaf7 JW	27	/**
e3e2aaf7 JW	28	* kgdb_skipexception - (optional) exit kgdb_handle_exception early
dc7d5527 JW	29	* @exception: Exception vector number
	30	* @regs: Current &struct pt_regs.
	31	*
e3e2aaf7 JW	32	* On some architectures it is required to skip a breakpoint
e3e2aaf7 JW	33	* exception when it occurs after a breakpoint has been removed.
b11e1eca	34	* This can be implemented in the architecture specific portion of kgdb.
dc7d5527 JW	35	*/
	36	extern int kgdb_skipexception(int exception, struct pt_regs *regs);
	37
dc7d5527 JW	38	struct tasklet_struct;
	39	struct task_struct;
	40	struct uart_port;
	41
e3e2aaf7 JW	42	/**
	43	* kgdb_breakpoint - compiled in breakpoint
	44	*
b11e1eca	45	* This will be implemented as a static inline per architecture. This
e3e2aaf7 JW	46	* function is called by the kgdb core to execute an architecture
	47	* specific trap to cause kgdb to enter the exception processing.
	48	*
	49	*/
dc7d5527 JW	50	void kgdb_breakpoint(void);
	51
	52	extern int kgdb_connected;
f503b5ae	53	extern int kgdb_io_module_registered;
dc7d5527 JW	54
	55	extern atomic_t kgdb_setting_breakpoint;
	56	extern atomic_t kgdb_cpu_doing_single_step;
	57
	58	extern struct task_struct *kgdb_usethread;
	59	extern struct task_struct *kgdb_contthread;
	60
	61	enum kgdb_bptype {
	62	BP_BREAKPOINT = 0,
	63	BP_HARDWARE_BREAKPOINT,
	64	BP_WRITE_WATCHPOINT,
	65	BP_READ_WATCHPOINT,
3751d3e8 JW	66	BP_ACCESS_WATCHPOINT,
3751d3e8 JW	67	BP_POKE_BREAKPOINT,
dc7d5527 JW	68	};
	69
	70	enum kgdb_bpstate {
	71	BP_UNDEFINED = 0,
	72	BP_REMOVED,
	73	BP_SET,
	74	BP_ACTIVE
	75	};
	76
	77	struct kgdb_bkpt {
	78	unsigned long bpt_addr;
	79	unsigned char saved_instr[BREAK_INSTR_SIZE];
	80	enum kgdb_bptype type;
	81	enum kgdb_bpstate state;
	82	};
	83
534af108 JW	84	struct dbg_reg_def_t {
	85	char *name;
	86	int size;
	87	int offset;
	88	};
	89
	90	#ifndef DBG_MAX_REG_NUM
	91	#define DBG_MAX_REG_NUM 0
	92	#else
	93	extern struct dbg_reg_def_t dbg_reg_def[];
	94	extern char dbg_get_reg(int regno, void mem, struct pt_regs *regs);
	95	extern int dbg_set_reg(int regno, void mem, struct pt_regs regs);
	96	#endif
dc7d5527 JW	97	#ifndef KGDB_MAX_BREAKPOINTS
	98	# define KGDB_MAX_BREAKPOINTS 1000
	99	#endif
	100
	101	#define KGDB_HW_BREAKPOINT 1
	102
	103	/*
	104	* Functions each KGDB-supporting architecture must provide:
	105	*/
	106
e3e2aaf7	107	/**
dc7d5527 JW	108	* kgdb_arch_init - Perform any architecture specific initalization.
	109	*
	110	* This function will handle the initalization of any architecture
	111	* specific callbacks.
	112	*/
	113	extern int kgdb_arch_init(void);
	114
e3e2aaf7	115	/**
dc7d5527 JW	116	* kgdb_arch_exit - Perform any architecture specific uninitalization.
	117	*
	118	* This function will handle the uninitalization of any architecture
	119	* specific callbacks, for dynamic registration and unregistration.
	120	*/
	121	extern void kgdb_arch_exit(void);
	122
e3e2aaf7	123	/**
dc7d5527 JW	124	* pt_regs_to_gdb_regs - Convert ptrace regs to GDB regs
	125	* @gdb_regs: A pointer to hold the registers in the order GDB wants.
	126	* @regs: The &struct pt_regs of the current process.
	127	*
	128	* Convert the pt_regs in @regs into the format for registers that
	129	* GDB expects, stored in @gdb_regs.
	130	*/
	131	extern void pt_regs_to_gdb_regs(unsigned long gdb_regs, struct pt_regs regs);
	132
e3e2aaf7	133	/**
dc7d5527 JW	134	* sleeping_thread_to_gdb_regs - Convert ptrace regs to GDB regs
	135	* @gdb_regs: A pointer to hold the registers in the order GDB wants.
	136	* @p: The &struct task_struct of the desired process.
	137	*
	138	* Convert the register values of the sleeping process in @p to
	139	* the format that GDB expects.
	140	* This function is called when kgdb does not have access to the
	141	* &struct pt_regs and therefore it should fill the gdb registers
	142	* @gdb_regs with what has been saved in &struct thread_struct
	143	* thread field during switch_to.
	144	*/
	145	extern void
	146	sleeping_thread_to_gdb_regs(unsigned long gdb_regs, struct task_struct p);
	147
e3e2aaf7	148	/**
dc7d5527 JW	149	* gdb_regs_to_pt_regs - Convert GDB regs to ptrace regs.
	150	* @gdb_regs: A pointer to hold the registers we've received from GDB.
	151	* @regs: A pointer to a &struct pt_regs to hold these values in.
	152	*
	153	* Convert the GDB regs in @gdb_regs into the pt_regs, and store them
	154	* in @regs.
	155	*/
	156	extern void gdb_regs_to_pt_regs(unsigned long gdb_regs, struct pt_regs regs);
	157
e3e2aaf7	158	/**
dc7d5527 JW	159	* kgdb_arch_handle_exception - Handle architecture specific GDB packets.
	160	* @vector: The error vector of the exception that happened.
	161	* @signo: The signal number of the exception that happened.
	162	* @err_code: The error code of the exception that happened.
	163	* @remcom_in_buffer: The buffer of the packet we have read.
	164	* @remcom_out_buffer: The buffer of %BUFMAX bytes to write a packet into.
	165	* @regs: The &struct pt_regs of the current process.
	166	*
	167	* This function MUST handle the 'c' and 's' command packets,
	168	* as well packets to set / remove a hardware breakpoint, if used.
	169	* If there are additional packets which the hardware needs to handle,
	170	* they are handled here. The code should return -1 if it wants to
	171	* process more packets, and a %0 or %1 if it wants to exit from the
	172	* kgdb callback.
	173	*/
	174	extern int
	175	kgdb_arch_handle_exception(int vector, int signo, int err_code,
	176	char *remcom_in_buffer,
	177	char *remcom_out_buffer,
	178	struct pt_regs *regs);
	179
e3e2aaf7	180	/**
dc7d5527 JW	181	* kgdb_roundup_cpus - Get other CPUs into a holding pattern
	182	* @flags: Current IRQ state
	183	*
	184	* On SMP systems, we need to get the attention of the other CPUs
b11e1eca	185	* and get them into a known state. This should do what is needed
dc7d5527 JW	186	* to get the other CPUs to call kgdb_wait(). Note that on some arches,
	187	* the NMI approach is not used for rounding up all the CPUs. For example,
	188	* in case of MIPS, smp_call_function() is used to roundup CPUs. In
	189	* this case, we have to make sure that interrupts are enabled before
	190	* calling smp_call_function(). The argument to this function is
	191	* the flags that will be used when restoring the interrupts. There is
	192	* local_irq_save() call before kgdb_roundup_cpus().
	193	*
	194	* On non-SMP systems, this is not called.
	195	*/
	196	extern void kgdb_roundup_cpus(unsigned long flags);
	197
84c08fd6 JW	198	/**
	199	* kgdb_arch_set_pc - Generic call back to the program counter
	200	* @regs: Current &struct pt_regs.
	201	* @pc: The new value for the program counter
	202	*
	203	* This function handles updating the program counter and requires an
	204	* architecture specific implementation.
	205	*/
	206	extern void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc);
	207
	208
dc7d5527 JW	209	/* Optional functions. */
dc7d5527 JW	210	extern int kgdb_validate_break_address(unsigned long addr);
98b54aa1 JW	211	extern int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt);
98b54aa1 JW	212	extern int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt);
dc7d5527	213
0b4b3827 JW	214	/**
	215	* kgdb_arch_late - Perform any architecture specific initalization.
	216	*
	217	* This function will handle the late initalization of any
	218	* architecture specific callbacks. This is an optional function for
	219	* handling things like late initialization of hw breakpoints. The
	220	* default implementation does nothing.
	221	*/
	222	extern void kgdb_arch_late(void);
	223
	224
e3e2aaf7	225	/**
dc7d5527 JW	226	* struct kgdb_arch - Describe architecture specific values.
	227	* @gdb_bpt_instr: The instruction to trigger a breakpoint.
	228	* @flags: Flags for the breakpoint, currently just %KGDB_HW_BREAKPOINT.
	229	* @set_breakpoint: Allow an architecture to specify how to set a software
	230	* breakpoint.
	231	* @remove_breakpoint: Allow an architecture to specify how to remove a
	232	* software breakpoint.
	233	* @set_hw_breakpoint: Allow an architecture to specify how to set a hardware
	234	* breakpoint.
	235	* @remove_hw_breakpoint: Allow an architecture to specify how to remove a
	236	* hardware breakpoint.
d7ba979d DD	237	* @disable_hw_break: Allow an architecture to specify how to disable
d7ba979d DD	238	* hardware breakpoints for a single cpu.
dc7d5527 JW	239	* @remove_all_hw_break: Allow an architecture to specify how to remove all
	240	* hardware breakpoints.
	241	* @correct_hw_break: Allow an architecture to specify how to correct the
	242	* hardware debug registers.
	243	*/
	244	struct kgdb_arch {
	245	unsigned char gdb_bpt_instr[BREAK_INSTR_SIZE];
	246	unsigned long flags;
	247
	248	int (set_breakpoint)(unsigned long, char );
	249	int (remove_breakpoint)(unsigned long, char );
	250	int (*set_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
	251	int (*remove_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
d7ba979d	252	void (disable_hw_break)(struct pt_regs regs);
dc7d5527 JW	253	void (*remove_all_hw_break)(void);
	254	void (*correct_hw_break)(void);
	255	};
	256
e3e2aaf7	257	/**
dc7d5527 JW	258	* struct kgdb_io - Describe the interface for an I/O driver to talk with KGDB.
	259	* @name: Name of the I/O driver.
	260	* @read_char: Pointer to a function that will return one char.
	261	* @write_char: Pointer to a function that will write one char.
	262	* @flush: Pointer to a function that will flush any pending writes.
	263	* @init: Pointer to a function that will initialize the device.
	264	* @pre_exception: Pointer to a function that will do any prep work for
	265	* the I/O driver.
	266	* @post_exception: Pointer to a function that will do any cleanup work
	267	* for the I/O driver.
efe2f29e JW	268	* @is_console: 1 if the end device is a console 0 if the I/O device is
efe2f29e JW	269	* not a console
dc7d5527 JW	270	*/
	271	struct kgdb_io {
	272	const char *name;
	273	int (*read_char) (void);
	274	void (*write_char) (u8);
	275	void (*flush) (void);
	276	int (*init) (void);
	277	void (*pre_exception) (void);
	278	void (*post_exception) (void);
efe2f29e	279	int is_console;
dc7d5527 JW	280	};
	281
	282	extern struct kgdb_arch arch_kgdb_ops;
	283
688b744d HH	284	extern unsigned long __weak kgdb_arch_pc(int exception, struct pt_regs *regs);
688b744d HH	285
dc7d5527 JW	286	extern int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops);
dc7d5527 JW	287	extern void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops);
53197fc4	288	extern struct kgdb_io *dbg_io_ops;
dc7d5527	289
688b744d	290	extern int kgdb_hex2long(char *ptr, unsigned long long_val);
55751145	291	extern char kgdb_mem2hex(char mem, char *buf, int count);
dc7d5527 JW	292	extern int kgdb_hex2mem(char buf, char mem, int count);
	293
	294	extern int kgdb_isremovedbreak(unsigned long addr);
1cee5e35	295	extern void kgdb_schedule_breakpoint(void);
dc7d5527 JW	296
	297	extern int
	298	kgdb_handle_exception(int ex_vector, int signo, int err_code,
	299	struct pt_regs *regs);
	300	extern int kgdb_nmicallback(int cpu, void *regs);
d57f078b	301	extern void gdbstub_exit(int status);
dc7d5527 JW	302
	303	extern int kgdb_single_step;
	304	extern atomic_t kgdb_active;
dcc78711 JW	305	#define in_dbg_master() \
dcc78711 JW	306	(raw_smp_processor_id() == atomic_read(&kgdb_active))
0b4b3827 JW	307	extern bool dbg_is_early;
0b4b3827 JW	308	extern void __init dbg_late_init(void);
dcc78711 JW	309	#else /* ! CONFIG_KGDB */
dcc78711 JW	310	#define in_dbg_master() (0)
0b4b3827	311	#define dbg_late_init()
dcc78711	312	#endif /* ! CONFIG_KGDB */
dc7d5527	313	#endif /* _KGDB_H_ */