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