cpu/ixp/interrupts.c

   1 /* vi: set ts=8 sw=8 noet: */
   2 /*
   3  * (C) Copyright 2002
   4  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   5  * Marius Groeger <mgroeger@sysgo.de>
   6  *
   7  * (C) Copyright 2002
   8  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   9  * Alex Zuepke <azu@sysgo.de>
  10  *
  11  * See file CREDITS for list of people who contributed to this
  12  * project.
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License as
  16  * published by the Free Software Foundation; either version 2 of
  17  * the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27  * MA 02111-1307 USA
  28  */
  29
  30 #include <common.h>
  31 #include <asm/arch/ixp425.h>
  32
  33 extern void reset_cpu (ulong addr);
  34
  35 #ifdef CONFIG_USE_IRQ
  36 /* enable IRQ/FIQ interrupts */
  37 void enable_interrupts (void)
  38 {
  39 #error: interrupts not implemented yet
  40 }
  41
  42
  43 /*
  44  * disable IRQ/FIQ interrupts
  45  * returns true if interrupts had been enabled before we disabled them
  46  */
  47 int disable_interrupts (void)
  48 {
  49 #error: interrupts not implemented yet
  50 }
  51 #else
  52 void enable_interrupts (void)
  53 {
  54         return;
  55 }
  56 int disable_interrupts (void)
  57 {
  58         return 0;
  59 }
  60 #endif
  61
  62
  63 void bad_mode (void)
  64 {
  65         panic ("Resetting CPU ...\n");
  66         reset_cpu (0);
  67 }
  68
  69 void show_regs (struct pt_regs *regs)
  70 {
  71         unsigned long flags;
  72         const char *processor_modes[] = {
  73         "USER_26",      "FIQ_26",       "IRQ_26",       "SVC_26",
  74         "UK4_26",       "UK5_26",       "UK6_26",       "UK7_26",
  75         "UK8_26",       "UK9_26",       "UK10_26",      "UK11_26",
  76         "UK12_26",      "UK13_26",      "UK14_26",      "UK15_26",
  77         "USER_32",      "FIQ_32",       "IRQ_32",       "SVC_32",
  78         "UK4_32",       "UK5_32",       "UK6_32",       "ABT_32",
  79         "UK8_32",       "UK9_32",       "UK10_32",      "UND_32",
  80         "UK12_32",      "UK13_32",      "UK14_32",      "SYS_32"
  81         };
  82
  83         flags = condition_codes (regs);
  84
  85         printf ("pc : [<%08lx>]    lr : [<%08lx>]\n"
  86                 "sp : %08lx  ip : %08lx  fp : %08lx\n",
  87                 instruction_pointer (regs),
  88                 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
  89         printf ("r10: %08lx  r9 : %08lx  r8 : %08lx\n",
  90                 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
  91         printf ("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
  92                 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
  93         printf ("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
  94                 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
  95         printf ("Flags: %c%c%c%c",
  96                 flags & CC_N_BIT ? 'N' : 'n',
  97                 flags & CC_Z_BIT ? 'Z' : 'z',
  98                 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
  99         printf ("  IRQs %s  FIQs %s  Mode %s%s\n",
 100                 interrupts_enabled (regs) ? "on" : "off",
 101                 fast_interrupts_enabled (regs) ? "on" : "off",
 102                 processor_modes[processor_mode (regs)],
 103                 thumb_mode (regs) ? " (T)" : "");
 104 }
 105
 106 void do_undefined_instruction (struct pt_regs *pt_regs)
 107 {
 108         printf ("undefined instruction\n");
 109         show_regs (pt_regs);
 110         bad_mode ();
 111 }
 112
 113 void do_software_interrupt (struct pt_regs *pt_regs)
 114 {
 115         printf ("software interrupt\n");
 116         show_regs (pt_regs);
 117         bad_mode ();
 118 }
 119
 120 void do_prefetch_abort (struct pt_regs *pt_regs)
 121 {
 122         printf ("prefetch abort\n");
 123         show_regs (pt_regs);
 124         bad_mode ();
 125 }
 126
 127 void do_data_abort (struct pt_regs *pt_regs)
 128 {
 129         printf ("data abort\n");
 130         show_regs (pt_regs);
 131         bad_mode ();
 132 }
 133
 134 void do_not_used (struct pt_regs *pt_regs)
 135 {
 136         printf ("not used\n");
 137         show_regs (pt_regs);
 138         bad_mode ();
 139 }
 140
 141 void do_fiq (struct pt_regs *pt_regs)
 142 {
 143         printf ("fast interrupt request\n");
 144         show_regs (pt_regs);
 145         bad_mode ();
 146 }
 147
 148 void do_irq (struct pt_regs *pt_regs)
 149 {
 150         printf ("interrupt request\n");
 151         show_regs (pt_regs);
 152         bad_mode ();
 153 }
 154
 155
 156 int interrupt_init (void)
 157 {
 158         /* nothing happens here - we don't setup any IRQs */
 159         return (0);
 160 }