arch/ppc/cpu/mpc8220/interrupts.c

   1 /*
   2  * (C) Copyright -2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2001
   6  * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 /*
  28  * interrupts.c - just enough support for the decrementer/timer
  29  */
  30
  31 #include <common.h>
  32 #include <asm/processor.h>
  33 #include <command.h>
  34
  35 int interrupt_init_cpu (ulong * decrementer_count)
  36 {
  37         *decrementer_count = get_tbclk () / CONFIG_SYS_HZ;
  38
  39         return (0);
  40 }
  41
  42 /****************************************************************************/
  43
  44 /*
  45  * Handle external interrupts
  46  */
  47 void external_interrupt (struct pt_regs *regs)
  48 {
  49         puts ("external_interrupt (oops!)\n");
  50 }
  51
  52 void timer_interrupt_cpu (struct pt_regs *regs)
  53 {
  54         /* nothing to do here */
  55         return;
  56 }
  57
  58 /****************************************************************************/
  59
  60 /*
  61  * Install and free a interrupt handler.
  62  */
  63
  64 void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
  65 {
  66
  67 }
  68
  69 void irq_free_handler (int vec)
  70 {
  71
  72 }
  73
  74 /****************************************************************************/
  75
  76 void
  77 do_irqinfo (cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
  78 {
  79         puts ("IRQ related functions are unimplemented currently.\n");
  80 }