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/* irq_init.c
*
* 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.
*
* Till Straumann <strauman@slac.stanford.edu>, 12/20/2001:
* Use the new interface to openpic_init
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#include <libcpu/io.h>
#include <libcpu/spr.h>
#include <bsp/pci.h>
#include <bsp/residual.h>
#include <bsp/irq.h>
#include <bsp.h>
#include <bsp/vectors.h>
#include <rtems/bspIo.h>
#define SHOW_ISA_PCI_BRIDGE_SETTINGS 1
#define SCAN_PCI_PRINT 1
#define TRACE_IRQ_INIT 0
typedef struct {
unsigned char bus; /* few chance the PCI/ISA bridge is not on first bus but ... */
unsigned char device;
unsigned char function;
} pci_isa_bridge_device;
pci_isa_bridge_device* via_82c586 = 0;
extern unsigned int external_exception_vector_prolog_code_size[];
extern void external_exception_vector_prolog_code(void);
extern unsigned int decrementer_exception_vector_prolog_code_size[];
extern void decrementer_exception_vector_prolog_code(void);
static void IRQ_Default_rtems_irq_hdl( rtems_irq_hdl_param ptr ) {}
static void IRQ_Default_rtems_irq_enable (const struct __rtems_irq_connect_data__ *ptr){}
static void IRQ_Default_rtems_irq_disable(const struct __rtems_irq_connect_data__ *ptr){}
static int IRQ_Default_rtems_irq_is_enabled(const struct __rtems_irq_connect_data__ *ptr){ return 1; }
static rtems_irq_connect_data rtemsIrq[BSP_IRQ_NUMBER];
static rtems_irq_global_settings initial_config;
static rtems_irq_connect_data defaultIrq = {
/*name, hdl handle on off isOn */
0, IRQ_Default_rtems_irq_hdl, NULL, IRQ_Default_rtems_irq_enable, IRQ_Default_rtems_irq_disable, IRQ_Default_rtems_irq_is_enabled
};
static rtems_irq_prio irqPrioTable[BSP_IRQ_NUMBER];
/*
* 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
*/
/*
* Initialize RTEMS management interrupt table
*/
/*
* re-init the rtemsIrq table
*/
for (i = 0; i < BSP_IRQ_NUMBER; i++) {
irqPrioTable[i] = 8;
rtemsIrq[i] = defaultIrq;
rtemsIrq[i].name = i;
#ifdef BSP_SHARED_HANDLER_SUPPORT
rtemsIrq[i].next_handler = NULL;
#endif
}
/*
* 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;
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 operational\n");
#endif
}
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