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Add default exception handler.

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This commit is contained in:
Eric Norum
2006-04-11 19:17:09 +00:00
parent e1d44a830d
commit e846fc90ab
2 changed files with 57 additions and 1 deletions
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6
c/src/lib/libbsp/m68k/uC5282/ChangeLog
View File

@@ -1,6 +1,10 @@
2006-04-11 Eric Norum <norume@aps.anl.gov>
* startup/bspstart.c: Install default exception handler.
2006-03-24 Eric Norum <norume@aps.anl.gov>
* startup/bspstart.c: Add missing reset-cause bit
* startup/bspstart.c: Add missing reset-cause bit.
2006-02-08 Joel Sherrill <joel@OARcorp.com>

52
c/src/lib/libbsp/m68k/uC5282/startup/bspstart.c
View File

@@ -20,6 +20,7 @@
#include <bsp.h>
#include <rtems/libio.h>
#include <rtems/error.h>
#include <rtems/libcsupport.h>
#include <stdio.h>
#include <string.h>
@@ -185,6 +186,49 @@ void bsp_postdriver_hook(void);
void bsp_libc_init( void *, uint32_t, int );
void bsp_pretasking_hook(void); /* m68k version */
/*
* The Arcturus boot ROM prints exception information improperly
* so use this default exception handler instead. This one also
* prints a call backtrace
*/
static void handler(int pc)
{
int level;
static volatile int reent;
extern char _RamSize[];
rtems_interrupt_disable(level);
if (reent++) bsp_reset(0);
{
int *p = &pc;
int info = p[-1];
int pc = p[0];
int format = (info >> 28) & 0xF;
int faultStatus = ((info >> 24) & 0xC) | ((info >> 16) & 0x3);
int vector = (info >> 18) & 0xFF;
int statusRegister = info & 0xFFFF;
int *fp;
printk("\n\nPC:%x SR:%x VEC:%x FORMAT:%x STATUS:%x\n", pc,
statusRegister,
vector,
format,
faultStatus);
fp = &p[-2];
for(;;) {
int *nfp = (int *)*fp;
if ((nfp <= fp)
|| ((char *)nfp >= _RamSize)
|| ((char *)(nfp[1]) >= _RamSize))
break;
printk("FP:%x -> %x PC:%x\n", fp, nfp, nfp[1]);
fp = nfp;
}
}
rtems_task_suspend(0);
rtems_panic("done");
}
/*
* bsp_start
*
@@ -192,6 +236,7 @@ void bsp_pretasking_hook(void); /* m68k version */
*/
void bsp_start( void )
{
int i;
extern char _WorkspaceBase[];
extern char _RamBase[], _RamSize[];
extern unsigned long _M68k_Ramsize;
@@ -206,6 +251,13 @@ void bsp_start( void )
* of work space from the last physical address on the CPU board.
*/
/*
* Set up default exception handler
*/
for (i = 2 ; i < 256 ; i++)
if (i != (32+2)) /* Catch all but bootrom system calls */
*((void (**)(int))(i * 4)) = handler;
/*
* Need to "allocate" the memory for the RTEMS Workspace and
* tell the RTEMS configuration where it is. This memory is