cpu/mpc83xx/interrupts.c

   1 /*
   2  * (C) Copyright 2000-2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Copyright 2004 Freescale Semiconductor, Inc.
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  *
  25  * Change log:
  26  *
  27  * Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 22-Oct-00
  28  *
  29  * 20050101: Eran Liberty (liberty@freescale.com)
  30  *           Initial file creating (porting from 85XX & 8260)
  31  */
  32
  33 #include <common.h>
  34 #include <command.h>
  35 #include <mpc83xx.h>
  36 #include <asm/processor.h>
  37
  38 struct irq_action {
  39         interrupt_handler_t *handler;
  40         void *arg;
  41         ulong count;
  42 };
  43
  44 int interrupt_init_cpu (unsigned *decrementer_count)
  45 {
  46         DECLARE_GLOBAL_DATA_PTR;
  47
  48         volatile immap_t *immr = (immap_t *) CFG_IMMRBAR;
  49
  50         *decrementer_count = (gd->bus_clk / 4) / CFG_HZ;
  51
  52         /* Enable e300 time base */
  53
  54         immr->sysconf.spcr |= 0x00400000;
  55
  56         return 0;
  57 }
  58
  59
  60 /*
  61  * Handle external interrupts
  62  */
  63
  64 void external_interrupt (struct pt_regs *regs)
  65 {
  66 }
  67
  68
  69 /*
  70  * Install and free an interrupt handler.
  71  */
  72
  73 void
  74 irq_install_handler (int irq, interrupt_handler_t * handler, void *arg)
  75 {
  76 }
  77
  78
  79 void irq_free_handler (int irq)
  80 {
  81 }
  82
  83
  84 void timer_interrupt_cpu (struct pt_regs *regs)
  85 {
  86         /* nothing to do here */
  87         return;
  88 }
  89
  90
  91 #if (CONFIG_COMMANDS & CFG_CMD_IRQ)
  92
  93 /* ripped this out of ppc4xx/interrupts.c */
  94
  95 /*
  96  * irqinfo - print information about PCI devices
  97  */
  98
  99 void
 100 do_irqinfo(cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
 101 {
 102 }
 103
 104 #endif          /* CONFIG_COMMANDS & CFG_CMD_IRQ */