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/*
* This file contains the implementation of rtems initialization
* related to interrupt handling
*/
/*
* Copyright (C) 1999 valette@crf.canon.fr
*
* Enhanced by Jay Kulpinski <jskulpin@eng01.gdds.com>
* to make it valid for MVME2300 Motorola boards.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <libcpu/io.h>
#include <libcpu/spr.h>
#include <bsp/irq.h>
#include <bsp.h>
#include <psim.h>
#include <bsp/vectors.h>
#include <rtems/bspIo.h>
#include <bsp/openpic.h>
#include <bsp/irq-generic.h>
static rtems_irq_connect_data rtemsIrq[BSP_IRQ_NUMBER];
static rtems_irq_global_settings initial_config;
static rtems_irq_connect_data defaultIrq = {
/* vectorIdex, hdl , handle , on , off , isOn */
0, NULL, NULL , NULL, NULL, NULL
};
static rtems_irq_prio irqPrioTable[BSP_IRQ_NUMBER]={
/*
* Processor exceptions handled as interrupts
*/
0
};
/*
* This code assumes the exceptions management setup has already
* been done. We just need to replace the exceptions that will
* be handled like interrupt. On mcp750/mpc750 and many PPC processors
* this means the decrementer exception and the external exception.
*/
void BSP_rtems_irq_mng_init(unsigned cpuId)
{
int i;
/*
* First initialize the Interrupt management hardware
*/
OpenPIC = (void*)PSIM.OpenPIC;
openpic_init(1,0,0,16,0,0);
/*
* Initialize Rtems management interrupt table
*/
/*
* re-init the rtemsIrq table
*/
for (i = 0; i < BSP_IRQ_NUMBER; i++) {
rtemsIrq[i] = defaultIrq;
rtemsIrq[i].name = i;
}
/*
* Init initial Interrupt management config
*/
initial_config.irqNb = BSP_IRQ_NUMBER;
initial_config.defaultEntry = defaultIrq;
initial_config.irqHdlTbl = rtemsIrq;
initial_config.irqBase = BSP_LOWEST_OFFSET;
initial_config.irqPrioTbl = irqPrioTable;
for (i = BSP_PCI_IRQ_LOWEST_OFFSET; i< BSP_PCI_IRQ_NUMBER; i++ ) {
irqPrioTable[i] = 8;
}
if (!BSP_rtems_irq_mngt_set(&initial_config)) {
/*
* put something here that will show the failure...
*/
BSP_panic(
"Unable to initialize RTEMS interrupt Management!!! System locked\n"
);
}
#ifdef TRACE_IRQ_INIT
printk("RTEMS IRQ management is now operationnal\n");
#endif
}
static int psim_exception_handler(
BSP_Exception_frame *frame,
unsigned exception_number
)
{
BSP_panic("Unexpected interrupt occured");
return 0;
}
/*
* functions to enable/disable a source at the ipic
*/
void bsp_interrupt_vector_enable( rtems_vector_number irqnum)
{
/* FIXME: do something */
bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
}
void bsp_interrupt_vector_disable( rtems_vector_number irqnum)
{
/* FIXME: do something */
bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
}
rtems_status_code bsp_interrupt_facility_initialize(void)
{
/* Install exception handler */
if (ppc_exc_set_handler( ASM_EXT_VECTOR, psim_exception_handler)) {
return RTEMS_IO_ERROR;
}
return RTEMS_SUCCESSFUL;
}
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