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
  26 #include <common.h>
  27 #include <command.h>
  28 #include <mpc83xx.h>
  29 #include <asm/processor.h>
  30
  31 DECLARE_GLOBAL_DATA_PTR;
  32
  33 struct irq_action {
  34         interrupt_handler_t *handler;
  35         void *arg;
  36         ulong count;
  37 };
  38
  39 int interrupt_init_cpu (unsigned *decrementer_count)
  40 {
  41         volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
  42
  43         *decrementer_count = (gd->bus_clk / 4) / CONFIG_SYS_HZ;
  44
  45         /* Enable e300 time base */
  46
  47         immr->sysconf.spcr |= 0x00400000;
  48
  49         return 0;
  50 }
  51
  52
  53 /*
  54  * Handle external interrupts
  55  */
  56
  57 void external_interrupt (struct pt_regs *regs)
  58 {
  59 }
  60
  61
  62 /*
  63  * Install and free an interrupt handler.
  64  */
  65
  66 void
  67 irq_install_handler (int irq, interrupt_handler_t * handler, void *arg)
  68 {
  69 }
  70
  71
  72 void irq_free_handler (int irq)
  73 {
  74 }
  75
  76
  77 void timer_interrupt_cpu (struct pt_regs *regs)
  78 {
  79         /* nothing to do here */
  80         return;
  81 }
  82
  83
  84 #if defined(CONFIG_CMD_IRQ)
  85
  86 /* ripped this out of ppc4xx/interrupts.c */
  87
  88 /*
  89  * irqinfo - print information about PCI devices
  90  */
  91
  92 void
  93 do_irqinfo(cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
  94 {
  95 }
  96
  97 #endif