mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-03 21:48:15 +00:00
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/*
|
|
* (C) Copyright 2000-2002
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
* Rob Taylor, Flying Pig Systems. robt@flyingpig.com
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <mpc824x.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/pci_io.h>
|
|
#include <commproc.h>
|
|
#include "drivers/epic.h"
|
|
|
|
int interrupt_init_cpu (unsigned *decrementer_count)
|
|
{
|
|
*decrementer_count = (get_bus_freq (0) / 4) / CONFIG_SYS_HZ;
|
|
|
|
/*
|
|
* It's all broken at the moment and I currently don't need
|
|
* interrupts. If you want to fix it, have a look at the epic
|
|
* drivers in dink32 v12. They do everthing and Motorola said
|
|
* I could use the dink source in this project as long as
|
|
* copyright notices remain intact.
|
|
*/
|
|
|
|
epicInit (EPIC_DIRECT_IRQ, 0);
|
|
/* EPIC won't generate INT unless Current Task Pri < 15 */
|
|
epicCurTaskPrioSet(0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/****************************************************************************/
|
|
|
|
/*
|
|
* Handle external interrupts
|
|
*/
|
|
void external_interrupt (struct pt_regs *regs)
|
|
{
|
|
register unsigned long temp;
|
|
|
|
pci_readl (CONFIG_SYS_EUMB_ADDR + EPIC_PROC_INT_ACK_REG, temp);
|
|
sync (); /* i'm not convinced this is needed, but dink source has it */
|
|
temp &= 0xff; /*get vector */
|
|
|
|
/*TODO: handle them -... */
|
|
epicEOI ();
|
|
}
|
|
|
|
/****************************************************************************/
|
|
|
|
/*
|
|
* blank int handlers.
|
|
*/
|
|
|
|
void
|
|
irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
|
|
{
|
|
}
|
|
|
|
void irq_free_handler (int vec)
|
|
{
|
|
|
|
}
|
|
|
|
/*TODO: some handlers for winbond and 87308 interrupts
|
|
and what about generic pci inteerupts?
|
|
vga?
|
|
*/
|
|
|
|
void timer_interrupt_cpu (struct pt_regs *regs)
|
|
{
|
|
/* nothing to do here */
|
|
return;
|
|
}
|