/* * (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) / CFG_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 (CFG_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; }