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/*
* LEON Spurious Trap Handler
*
* This is just enough of a trap handler to let us know what
* the likely source of the trap was.
*
* Developed as part of the port of RTEMS to the LEON implementation
* of the SPARC by On-Line Applications Research Corporation (OAR)
* under contract to the European Space Agency (ESA).
*
* COPYRIGHT (c) 1995. European Space Agency.
*
* This terms of the RTEMS license apply to this file.
*
* $Id$
*/
#include <bsp.h>
#include <string.h>
static const char digits[16] = "0123456789abcdef";
/* Simple integer-to-string conversion */
void itos(unsigned32 u, char *s)
{
int i;
for (i=0; i<8; i++) {
s[i] = digits[(u >> (28 - (i*4))) & 0x0f];
}
}
/*
* bsp_spurious_handler
*
* Print a message on the debug console and then die
*/
rtems_isr bsp_spurious_handler(
rtems_vector_number trap,
CPU_Interrupt_frame *isf
)
{
char line[ 80 ];
rtems_unsigned32 real_trap;
real_trap = SPARC_REAL_TRAP_NUMBER(trap);
strcpy(line, "Unexpected trap (0x ) at address 0x ");
line[ 19 ] = digits[ real_trap >> 4 ];
line[ 20 ] = digits[ real_trap & 0xf ];
itos(isf->tpc, &line[36]);
DEBUG_puts( line );
switch (real_trap) {
/*
* First the ones defined by the basic architecture
*/
case 0x00:
DEBUG_puts( "reset" );
break;
case 0x01:
DEBUG_puts( "instruction access exception" );
break;
case 0x02:
DEBUG_puts( "illegal instruction" );
break;
case 0x03:
DEBUG_puts( "privileged instruction" );
break;
case 0x04:
DEBUG_puts( "fp disabled" );
break;
case 0x07:
DEBUG_puts( "memory address not aligned" );
break;
case 0x08:
DEBUG_puts( "fp exception" );
break;
case 0x09:
strcpy(line, "data access exception at 0x " );
itos(LEON_REG.Failed_Address, &line[27]);
DEBUG_puts( line );
break;
case 0x0A:
DEBUG_puts( "tag overflow" );
break;
/*
* Then the ones defined by the LEON in particular
*/
case LEON_TRAP_TYPE( LEON_INTERRUPT_CORRECTABLE_MEMORY_ERROR ):
DEBUG_puts( "LEON_INTERRUPT_CORRECTABLE_MEMORY_ERROR" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_UART_2_RX_TX ):
DEBUG_puts( "LEON_INTERRUPT_UART_2_RX_TX" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_UART_1_RX_TX ):
DEBUG_puts( "LEON_INTERRUPT_UART_1_RX_TX" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_0 ):
DEBUG_puts( "LEON_INTERRUPT_EXTERNAL_0" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_1 ):
DEBUG_puts( "LEON_INTERRUPT_EXTERNAL_1" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_2 ):
DEBUG_puts( "LEON_INTERRUPT_EXTERNAL_2" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_3 ):
DEBUG_puts( "LEON_INTERRUPT_EXTERNAL_3" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_TIMER1 ):
DEBUG_puts( "LEON_INTERRUPT_TIMER1" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_TIMER2 ):
DEBUG_puts( "LEON_INTERRUPT_TIMER2" );
break;
default:
break;
}
/*
* What else can we do but stop ...
*/
asm volatile( "mov 1, %g1; ta 0x0" );
}
/*
* bsp_spurious_initialize
*
* Install the spurious handler for most traps. Note that set_vector()
* will unmask the corresponding asynchronous interrupt, so the initial
* interrupt mask is restored after the handlers are installed.
*/
void bsp_spurious_initialize()
{
rtems_unsigned32 trap;
unsigned32 level;
unsigned32 mask;
level = sparc_disable_interrupts();
mask = LEON_REG.Interrupt_Mask;
for ( trap=0 ; trap<256 ; trap++ ) {
/*
* Skip window overflow, underflow, and flush as well as software
* trap 0 which we will use as a shutdown. Also avoid trap 0x70 - 0x7f
* which cannot happen and where some of the space is used to pass
* paramaters to the program.
*/
if (( trap == 5 || trap == 6 ) ||
(( trap >= 0x11 ) && ( trap <= 0x1f )) ||
(( trap >= 0x70 ) && ( trap <= 0x83 )))
continue;
set_vector(
(rtems_isr_entry) bsp_spurious_handler,
SPARC_SYNCHRONOUS_TRAP( trap ),
1
);
}
LEON_REG.Interrupt_Mask = mask;
sparc_enable_interrupts(level);
}
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