static void mpc55xx_interrupt_dispatch(void)
{
/* Acknowlege interrupt request */
rtems_vector_number vector = INTC.IACKR.B.INTVEC;
/* Save machine state and enable external exceptions */
uint32_t msr = ppc_external_exceptions_enable();
/* Dispatch interrupt handlers */
bsp_interrupt_handler_dispatch( vector);
/* Restore machine state */
ppc_external_exceptions_disable( msr);
/* End of interrupt */
INTC.EOIR.R = 1;
}
static void qoriq_interrupt_dispatch(void)
{
rtems_vector_number vector = qoriq.pic.iack;
if (vector != SPURIOUS) {
uint32_t msr = ppc_external_exceptions_enable();
bsp_interrupt_handler_dispatch(vector);
ppc_external_exceptions_disable(msr);
qoriq.pic.eoi = 0;
qoriq.pic.whoami;
} else {
bsp_interrupt_handler_default(vector);
}
}
static int ppc_clock_exception_handler_e300( BSP_Exception_frame *frame, unsigned number)
{
uint32_t msr;
/* Increment clock ticks */
Clock_driver_ticks += 1;
/* Enable external exceptions */
msr = ppc_external_exceptions_enable();
/* Call clock ticker */
ppc_clock_tick();
/* Restore machine state */
ppc_external_exceptions_disable( msr);
return 0;
}
static int qoriq_external_exception_handler(BSP_Exception_frame *frame, unsigned exception_number)
{
rtems_vector_number vector = qoriq.pic.iack;
if (vector != SPURIOUS) {
uint32_t msr = ppc_external_exceptions_enable();
bsp_interrupt_handler_dispatch(vector);
ppc_external_exceptions_disable(msr);
qoriq.pic.eoi = 0;
qoriq.pic.whoami;
} else {
bsp_interrupt_handler_default(vector);
}
return 0;
}
static int ppc_clock_exception_handler(
BSP_Exception_frame *frame,
unsigned number
)
{
uint32_t delta = ppc_clock_decrementer_value;
uint32_t next = ppc_clock_next_time_base;
uint32_t dec = 0;
uint32_t now = 0;
uint32_t msr = 0;
do {
/* Increment clock ticks */
Clock_driver_ticks += 1;
/* Enable external exceptions */
msr = ppc_external_exceptions_enable();
/* Call clock ticker */
ppc_clock_tick();
/* Restore machine state */
ppc_external_exceptions_disable( msr);
/* Next time base */
next += delta;
/* Current time */
now = ppc_time_base();
/* New decrementer value */
dec = next - now;
} while (dec > delta);
/* Set decrementer */
ppc_set_decrementer_register( dec);
/* Expected next time base */
ppc_clock_next_time_base = next;
return 0;
}
static int ppc_clock_exception_handler_booke( BSP_Exception_frame *frame, unsigned number)
{
uint32_t msr;
/* Acknowledge decrementer request */
PPC_SET_SPECIAL_PURPOSE_REGISTER( BOOKE_TSR, BOOKE_TSR_DIS);
/* Increment clock ticks */
Clock_driver_ticks += 1;
/* Enable external exceptions */
msr = ppc_external_exceptions_enable();
/* Call clock ticker */
ppc_clock_tick();
/* Restore machine state */
ppc_external_exceptions_disable( msr);
return 0;
}
/*
* IRQ Handler: this is called from the primary exception dispatcher
*/
static int BSP_irq_handle_at_ipic( unsigned excNum)
{
int32_t vecnum;
mpc83xx_ipic_mask_t mask_save;
const mpc83xx_ipic_mask_t *mask_ptr;
uint32_t msr = 0;
rtems_interrupt_level level;
/* Get vector number */
switch (excNum) {
case ASM_EXT_VECTOR:
vecnum = MPC83xx_VCR_TO_VEC( mpc83xx.ipic.sivcr);
break;
case ASM_E300_SYSMGMT_VECTOR:
vecnum = MPC83xx_VCR_TO_VEC( mpc83xx.ipic.smvcr);
break;
case ASM_E300_CRIT_VECTOR:
vecnum = MPC83xx_VCR_TO_VEC( mpc83xx.ipic.scvcr);
break;
default:
return 1;
}
/*
* Check the vector number, mask lower priority interrupts, enable
* exceptions and dispatch the handler.
*/
if (MPC83XX_IPIC_IS_VALID_VECTOR( vecnum)) {
#ifdef GEN83XX_ENABLE_INTERRUPT_NESTING
mask_ptr = &mpc83xx_ipic_prio2mask [vecnum];
rtems_interrupt_disable( level);
/* Save current mask registers */
mask_save.simsr_mask [0] = mpc83xx.ipic.simsr [0];
mask_save.simsr_mask [1] = mpc83xx.ipic.simsr [1];
mask_save.semsr_mask = mpc83xx.ipic.semsr;
mask_save.sermr_mask = mpc83xx.ipic.sermr;
/* Mask all lower priority interrupts */
mpc83xx.ipic.simsr [0] &= mask_ptr->simsr_mask [0];
mpc83xx.ipic.simsr [1] &= mask_ptr->simsr_mask [1];
mpc83xx.ipic.semsr &= mask_ptr->semsr_mask;
mpc83xx.ipic.sermr &= mask_ptr->sermr_mask;
rtems_interrupt_enable( level);
/* Enable all interrupts */
if (excNum != ASM_E300_CRIT_VECTOR) {
msr = ppc_external_exceptions_enable();
}
#endif /* GEN83XX_ENABLE_INTERRUPT_NESTING */
/* Dispatch interrupt handlers */
bsp_interrupt_handler_dispatch( vecnum + BSP_IPIC_IRQ_LOWEST_OFFSET);
#ifdef GEN83XX_ENABLE_INTERRUPT_NESTING
/* Restore machine state */
if (excNum != ASM_E300_CRIT_VECTOR) {
ppc_external_exceptions_disable( msr);
}
/* Restore initial masks */
rtems_interrupt_disable( level);
mpc83xx.ipic.simsr [0] = mask_save.simsr_mask [0];
mpc83xx.ipic.simsr [1] = mask_save.simsr_mask [1];
mpc83xx.ipic.semsr = mask_save.semsr_mask;
mpc83xx.ipic.sermr = mask_save.sermr_mask;
rtems_interrupt_enable( level);
#endif /* GEN83XX_ENABLE_INTERRUPT_NESTING */
} else {
bsp_interrupt_handler_default( vecnum);
}
return 0;
}
