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/*****************************************************************************/

/*

  $Id: gdb-hooks.c,v 1.2 2001-09-27 12:00:23 chris Exp $

  Hooks for GDB

 */

/*****************************************************************************/

#include <bsp.h>

#include <m68302.h>

#include <m68302scc.h>

static int initialised = 0;

void putDebugChar(char ch)

{

  if (!initialised)

  {

    scc_initialise(DEBUG_PORT, DEBUG_BAUD, 0);

    initialised = 1;

  }

  scc_out(DEBUG_PORT, ch);

}

char getDebugChar(void)

{

  if (!initialised)

  {

    scc_initialise(DEBUG_PORT, DEBUG_BAUD, 0);

    initialised = 1;

  }

  while (!scc_status(DEBUG_PORT, 0));

  return scc_in(DEBUG_PORT);

}

/*

 * Need to create yet another jump table for gdb this time

 */

void (*exceptionHook)(unsigned int) = 0;

typedef struct {

  rtems_unsigned16 move_a7;            /* move #FORMAT_ID,%a7@- */

  rtems_unsigned16 format_id;

  rtems_unsigned16 jmp;                /* jmp  _ISR_Handlers */

  rtems_unsigned32 isr_handler;

} GDB_HANDLER_ENTRY;

#if !defined(M68K_MOVE_A7)

#define M68K_MOVE_A7 0x3F3C

#endif

#if !defined(M68K_JMP)

#define M68K_JMP     0x4EF9

#endif

/* points to jsr-exception-table in targets wo/ VBR register */

static GDB_HANDLER_ENTRY gdb_jump_table[256];

void exceptionHandler(unsigned int vector, void *handler)

{

  rtems_unsigned32 *interrupt_table = 0;

  gdb_jump_table[vector].move_a7 = M68K_MOVE_A7;

  gdb_jump_table[vector].format_id = vector;

  gdb_jump_table[vector].jmp = M68K_JMP;

  gdb_jump_table[vector].isr_handler = (rtems_unsigned32) handler;

  interrupt_table[vector] = (rtems_unsigned32) &gdb_jump_table[vector];

}