cpu/arm_intcm/cpu.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * (C) Copyright 2002
   7  * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /*
  29  * CPU specific code for an unknown cpu
  30  * - hence fairly empty......
  31  */
  32
  33 #include <common.h>
  34 #include <command.h>
  35
  36 int cpu_init (void)
  37 {
  38         /*
  39          * setup up stacks if necessary
  40          */
  41 #ifdef CONFIG_USE_IRQ
  42         DECLARE_GLOBAL_DATA_PTR;
  43
  44         IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
  45         FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
  46 #endif
  47         return 0;
  48 }
  49
  50 int cleanup_before_linux (void)
  51 {
  52         /*
  53          * this function is called just before we call linux
  54          * it prepares the processor for linux
  55          *
  56          * we turn off caches etc ...
  57          */
  58
  59         disable_interrupts ();
  60
  61         /* Since the CM has unknown processor we do not support
  62          * cache operations
  63          */
  64
  65         return (0);
  66 }
  67
  68 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  69 {
  70         extern void reset_cpu (ulong addr);
  71
  72         disable_interrupts ();
  73         reset_cpu (0);
  74         /*NOTREACHED*/
  75         return (0);
  76 }
  77
  78 /* May not be cahed processor on the CM - do nothing */
  79 void icache_enable (void)
  80 {
  81 }
  82
  83 void icache_disable (void)
  84 {
  85 }
  86
  87 /* return "disabled" */
  88 int icache_status (void)
  89 {
  90         return 0;
  91 }