/**
* @file
* @ingroup RTEMSBSPsSPARCLEON2
* @brief LEON Spurious Trap Handler
*/
/*
* 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.
*/
#include <bsp.h>
#include <rtems/bspIo.h>
#include <inttypes.h>
void _CPU_Exception_frame_print( const CPU_Exception_frame *frame )
{
uint32_t trap;
uint32_t real_trap;
const CPU_Interrupt_frame *isf;
trap = frame->trap;
real_trap = SPARC_REAL_TRAP_NUMBER(trap);
isf = frame->isf;
printk(
"Unexpected trap (%2" PRId32 ") at address 0x%08" PRIx32 "\n",
real_trap,
isf->tpc
);
switch (real_trap) {
/*
* First the ones defined by the basic architecture
*/
case 0x00:
printk( "reset\n" );
break;
case 0x01:
printk( "instruction access exception\n" );
break;
case 0x02:
printk( "illegal instruction\n" );
break;
case 0x03:
printk( "privileged instruction\n" );
break;
case 0x04:
printk( "fp disabled\n" );
break;
case 0x07:
printk( "memory address not aligned\n" );
break;
case 0x08:
printk( "fp exception\n" );
break;
case 0x09:
printk("data access exception at 0x%08x\n", LEON_REG.Failed_Address );
break;
case 0x0A:
printk( "tag overflow\n" );
break;
/*
* Then the ones defined by the LEON in particular
*/
case LEON_TRAP_TYPE( LEON_INTERRUPT_CORRECTABLE_MEMORY_ERROR ):
printk( "LEON_INTERRUPT_CORRECTABLE_MEMORY_ERROR\n" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_UART_2_RX_TX ):
printk( "LEON_INTERRUPT_UART_2_RX_TX\n" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_UART_1_RX_TX ):
printk( "LEON_INTERRUPT_UART_1_RX_TX\n" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_0 ):
printk( "LEON_INTERRUPT_EXTERNAL_0\n" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_1 ):
printk( "LEON_INTERRUPT_EXTERNAL_1\n" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_2 ):
printk( "LEON_INTERRUPT_EXTERNAL_2\n" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_3 ):
printk( "LEON_INTERRUPT_EXTERNAL_3\n" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_TIMER1 ):
printk( "LEON_INTERRUPT_TIMER1\n" );
break;
case LEON_TRAP_TYPE( LEON_INTERRUPT_TIMER2 ):
printk( "LEON_INTERRUPT_TIMER2\n" );
break;
default:
break;
}
}
static rtems_isr bsp_spurious_handler(
rtems_vector_number trap,
CPU_Interrupt_frame *isf
)
{
CPU_Exception_frame frame = {
.trap = trap,
.isf = isf
};
#if !defined(SPARC_USE_LAZY_FP_SWITCH)
if ( SPARC_REAL_TRAP_NUMBER( trap ) == 4 ) {
_Internal_error( INTERNAL_ERROR_ILLEGAL_USE_OF_FLOATING_POINT_UNIT );
}
#endif
rtems_fatal(
RTEMS_FATAL_SOURCE_EXCEPTION,
(rtems_fatal_code) &frame
);
}
/*
* 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()
{
uint32_t trap;
uint32_t level;
uint32_t 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 0,9,10 which we will use as a shutdown, IRQ disable, IRQ enable.
* Also avoid trap 0x70 - 0x7f which cannot happen and where some of the
* space is used to pass parameters to the program.
*/
if (( trap == 5 || trap == 6 ) ||
#if defined(SPARC_USE_LAZY_FP_SWITCH)
( trap == 4 ) ||
#endif
(( trap >= 0x11 ) && ( trap <= 0x1f )) ||
(( trap >= 0x70 ) && ( trap <= 0x83 )) ||
( trap == 0x80 + SPARC_SWTRAP_IRQDIS ) ||
#if defined(SPARC_USE_SYNCHRONOUS_FP_SWITCH)
( trap == 0x80 + SPARC_SWTRAP_IRQDIS_FP ) ||
#endif
( trap == 0x80 + SPARC_SWTRAP_IRQEN ))
continue;
set_vector(
(rtems_isr_entry) bsp_spurious_handler,
SPARC_SYNCHRONOUS_TRAP( trap ),
1
);
}
LEON_REG.Interrupt_Mask = mask;
sparc_enable_interrupts(level);
}