/* * (C) Copyright 2001 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc. * * 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 */ /* * interrupts.c - just enough support for the decrementer/timer */ #include <common.h> #include <mpc8xx.h> #include <mpc8xx_irq.h> #include <asm/processor.h> #include <commproc.h> #include <command.h> int interrupt_init_cpu (unsigned *decrementer_count) { #if defined(DEBUG) && !defined(CONFIG_AMIGAONEG3SE) printf("interrupt_init: GT main cause reg: %08x:%08x\n", GTREGREAD(LOW_INTERRUPT_CAUSE_REGISTER), GTREGREAD(HIGH_INTERRUPT_CAUSE_REGISTER)); printf("interrupt_init: ethernet cause regs: %08x %08x %08x\n", GTREGREAD(ETHERNET0_INTERRUPT_CAUSE_REGISTER), GTREGREAD(ETHERNET1_INTERRUPT_CAUSE_REGISTER), GTREGREAD(ETHERNET2_INTERRUPT_CAUSE_REGISTER)); printf("interrupt_init: ethernet mask regs: %08x %08x %08x\n", GTREGREAD(ETHERNET0_INTERRUPT_MASK_REGISTER), GTREGREAD(ETHERNET1_INTERRUPT_MASK_REGISTER), GTREGREAD(ETHERNET2_INTERRUPT_MASK_REGISTER)); puts("interrupt_init: setting decrementer_count\n"); #endif *decrementer_count = get_tbclk() / CONFIG_SYS_HZ; return (0); } /****************************************************************************/ /* * Handle external interrupts */ void external_interrupt(struct pt_regs *regs) { puts("external_interrupt (oops!)\n"); } volatile ulong timestamp = 0; /* * timer_interrupt - gets called when the decrementer overflows, * with interrupts disabled. * Trivial implementation - no need to be really accurate. */ void timer_interrupt_cpu (struct pt_regs *regs) { /* nothing to do here */ return; } /****************************************************************************/ /* * Install and free a interrupt handler. */ void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg) { } void irq_free_handler(int vec) { } /****************************************************************************/ void do_irqinfo(cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[]) { puts("IRQ related functions are unimplemented currently.\n"); }