/*
* kdebug.h: Defines and definitions for debugging the Linux kernel
* under various kernel debuggers.
*
* Copyright (C) 1995 David S. Miller ([email protected])
*/
#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,
DIE_OOPS,
};

#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) */