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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.
*
* Modified for LEON3 BSP.
* COPYRIGHT (c) 2004.
* Gaisler Research.
*
* This terms of the RTEMS license apply to this file.
*
* $Id$
*/
#include <bsp.h>
#include <rtems/bspIo.h>
/*
* 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
)
{
uint32_t real_trap;
real_trap = SPARC_REAL_TRAP_NUMBER(trap);
printk( "Unexpected trap (%2d) at address 0x%08x\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( "Unexpected trap (0x%2d) at address XXX\n",
real_trap
/* XXX FIXME isf->tpc */
);
break;
case 0x0A:
printk( "tag overflow\n" );
break;
/*
* Then the ones defined by the LEON in particular
*/
/* FIXME */
/*
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;
}
/*
* 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()
{
uint32_t trap;
uint32_t level;
/* uint32_t mask; */
level = sparc_disable_interrupts();
/* mask = LEON3_IrqCtrl_Regs->mask_p0; */
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
);
}
/* LEON3_IrqCtrl_Regs->mask_p0 = mask; */
sparc_enable_interrupts(level);
}
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