LXR uboot/cpu/74xx_7xx/interrupts.c

   1/*
   2 * (C) Copyright 2001
   3 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24/*
  25 * interrupts.c - just enough support for the decrementer/timer
  26 */
  27
  28#include <common.h>
  29#include <mpc8xx.h>
  30#include <mpc8xx_irq.h>
  31#include <asm/processor.h>
  32#include <commproc.h>
  33#include <command.h>
  34
  35int interrupt_init_cpu (unsigned *decrementer_count)
  36{
  37#if defined(DEBUG) && !defined(CONFIG_AMIGAONEG3SE)
  38        printf("interrupt_init: GT main cause reg: %08x:%08x\n",
  39               GTREGREAD(LOW_INTERRUPT_CAUSE_REGISTER),
  40               GTREGREAD(HIGH_INTERRUPT_CAUSE_REGISTER));
  41        printf("interrupt_init: ethernet cause regs: %08x %08x %08x\n",
  42               GTREGREAD(ETHERNET0_INTERRUPT_CAUSE_REGISTER),
  43               GTREGREAD(ETHERNET1_INTERRUPT_CAUSE_REGISTER),
  44               GTREGREAD(ETHERNET2_INTERRUPT_CAUSE_REGISTER));
  45        printf("interrupt_init: ethernet mask regs:  %08x %08x %08x\n",
  46               GTREGREAD(ETHERNET0_INTERRUPT_MASK_REGISTER),
  47               GTREGREAD(ETHERNET1_INTERRUPT_MASK_REGISTER),
  48               GTREGREAD(ETHERNET2_INTERRUPT_MASK_REGISTER));
  49        puts("interrupt_init: setting decrementer_count\n");
  50#endif
  51        *decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
  52
  53        return (0);
  54}
  55
  56/****************************************************************************/
  57
  58/*
  59 * Handle external interrupts
  60 */
  61void
  62external_interrupt(struct pt_regs *regs)
  63{
  64        puts("external_interrupt (oops!)\n");
  65}
  66
  67volatile ulong timestamp = 0;
  68
  69/*
  70 * timer_interrupt - gets called when the decrementer overflows,
  71 * with interrupts disabled.
  72 * Trivial implementation - no need to be really accurate.
  73 */
  74void
  75timer_interrupt_cpu (struct pt_regs *regs)
  76{
  77        /* nothing to do here */
  78        return;
  79}
  80
  81/****************************************************************************/
  82
  83/*
  84 * Install and free a interrupt handler.
  85 */
  86
  87void
  88irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
  89{
  90
  91}
  92
  93void
  94irq_free_handler(int vec)
  95{
  96
  97}
  98
  99/****************************************************************************/
 100
 101void
 102do_irqinfo(cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
 103{
 104        puts("IRQ related functions are unimplemented currently.\n");
 105}
 106