[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-sparc / kdebug_32.h

/*
 * kdebug.h:  Defines and definitions for debugging the Linux kernel
 *            under various kernel debuggers.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */
#ifndef _SPARC_KDEBUG_H
#define _SPARC_KDEBUG_H

#include <asm/openprom.h>
#include <asm/vaddrs.h>

/* Breakpoints are enter through trap table entry 126.  So in sparc assembly
 * if you want to drop into the debugger you do:
 *
 * t DEBUG_BP_TRAP
 */

#define DEBUG_BP_TRAP     126

#ifndef __ASSEMBLY__
/* The debug vector is passed in %o1 at boot time.  It is a pointer to
 * a structure in the debuggers address space.  Here is its format.
 */

typedef unsigned int (*debugger_funct)(void);

struct kernel_debug {
	/* First the entry point into the debugger.  You jump here
	 * to give control over to the debugger.
	 */
	unsigned long kdebug_entry;
	unsigned long kdebug_trapme;   /* Figure out later... */
	/* The following is the number of pages that the debugger has
	 * taken from to total pool.
	 */
	unsigned long *kdebug_stolen_pages;
	/* Ok, after you remap yourself and/or change the trap table
	 * from what you were left with at boot time you have to call
	 * this synchronization function so the debugger can check out
	 * what you have done.
	 */
	debugger_funct teach_debugger;
}; /* I think that is it... */

extern struct kernel_debug *linux_dbvec;

/* Use this macro in C-code to enter the debugger. */
static inline void sp_enter_debugger(void)
{
	__asm__ __volatile__("jmpl %0, %%o7\n\t"
			     "nop\n\t" : :
			     "r" (linux_dbvec) : "o7", "memory");
}

#define SP_ENTER_DEBUGGER do { \
	     if((linux_dbvec!=0) && ((*(short *)linux_dbvec)!=-1)) \
	       sp_enter_debugger(); \
		       } while(0)

enum die_val {
	DIE_UNUSED,
};

#endif /* !(__ASSEMBLY__) */

/* Some nice offset defines for assembler code. */
#define KDEBUG_ENTRY_OFF    0x0
#define KDEBUG_DUNNO_OFF    0x4
#define KDEBUG_DUNNO2_OFF   0x8
#define KDEBUG_TEACH_OFF    0xc

#endif /* !(_SPARC_KDEBUG_H) */
Commit	Line	Data
f5e706ad SR	1	/*
	2	* kdebug.h: Defines and definitions for debugging the Linux kernel
	3	* under various kernel debuggers.
	4	*
	5	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	6	*/
	7	#ifndef _SPARC_KDEBUG_H
	8	#define _SPARC_KDEBUG_H
	9
	10	#include <asm/openprom.h>
	11	#include <asm/vaddrs.h>
	12
	13	/* Breakpoints are enter through trap table entry 126. So in sparc assembly
	14	* if you want to drop into the debugger you do:
	15	*
	16	* t DEBUG_BP_TRAP
	17	*/
	18
	19	#define DEBUG_BP_TRAP 126
	20
	21	#ifndef __ASSEMBLY__
	22	/* The debug vector is passed in %o1 at boot time. It is a pointer to
	23	* a structure in the debuggers address space. Here is its format.
	24	*/
	25
	26	typedef unsigned int (*debugger_funct)(void);
	27
	28	struct kernel_debug {
	29	/* First the entry point into the debugger. You jump here
	30	* to give control over to the debugger.
	31	*/
	32	unsigned long kdebug_entry;
	33	unsigned long kdebug_trapme; /* Figure out later... */
	34	/* The following is the number of pages that the debugger has
	35	* taken from to total pool.
	36	*/
	37	unsigned long *kdebug_stolen_pages;
	38	/* Ok, after you remap yourself and/or change the trap table
	39	* from what you were left with at boot time you have to call
	40	* this synchronization function so the debugger can check out
	41	* what you have done.
	42	*/
	43	debugger_funct teach_debugger;
	44	}; /* I think that is it... */
	45
	46	extern struct kernel_debug *linux_dbvec;
	47
	48	/* Use this macro in C-code to enter the debugger. */
	49	static inline void sp_enter_debugger(void)
	50	{
	51	__asm__ __volatile__("jmpl %0, %%o7\n\t"
	52	"nop\n\t" : :
	53	"r" (linux_dbvec) : "o7", "memory");
	54	}
	55
	56	#define SP_ENTER_DEBUGGER do { \
	57	if((linux_dbvec!=0) && (((short )linux_dbvec)!=-1)) \
	58	sp_enter_debugger(); \
	59	} while(0)
	60
	61	enum die_val {
	62	DIE_UNUSED,
	63	};
	64
65	#endif /* !(__ASSEMBLY__) */
66
67	/* Some nice offset defines for assembler code. */
68	#define KDEBUG_ENTRY_OFF 0x0
69	#define KDEBUG_DUNNO_OFF 0x4
70	#define KDEBUG_DUNNO2_OFF 0x8
71	#define KDEBUG_TEACH_OFF 0xc
72
73	#endif /* !(_SPARC_KDEBUG_H) */