lib_arm/interrupts.c

   1 /*
   2  * (C) Copyright 2003
   3  * Texas Instruments <www.ti.com>
   4  *
   5  * (C) Copyright 2002
   6  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   7  * Marius Groeger <mgroeger@sysgo.de>
   8  *
   9  * (C) Copyright 2002
  10  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  11  * Alex Zuepke <azu@sysgo.de>
  12  *
  13  * (C) Copyright 2002-2004
  14  * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
  15  *
  16  * (C) Copyright 2004
  17  * Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
  18  *
  19  * See file CREDITS for list of people who contributed to this
  20  * project.
  21  *
  22  * This program is free software; you can redistribute it and/or
  23  * modify it under the terms of the GNU General Public License as
  24  * published by the Free Software Foundation; either version 2 of
  25  * the License, or (at your option) any later version.
  26  *
  27  * This program is distributed in the hope that it will be useful,
  28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  30  * GNU General Public License for more details.
  31  *
  32  * You should have received a copy of the GNU General Public License
  33  * along with this program; if not, write to the Free Software
  34  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  35  * MA 02111-1307 USA
  36  */
  37
  38 #include <common.h>
  39 #include <asm/proc-armv/ptrace.h>
  40
  41 #ifdef CONFIG_USE_IRQ
  42 /* enable IRQ interrupts */
  43 void enable_interrupts (void)
  44 {
  45         unsigned long temp;
  46         __asm__ __volatile__(
  47 #ifdef CONFIG_GTA02_REVISION
  48                              "mov %0, #0x30000000\n"
  49                              "mcr p15, 0, %0, c13, c0\n"
  50 #endif
  51                              "mrs %0, cpsr\n"
  52                              "bic %0, %0, #0x80\n"
  53                              "msr cpsr_c, %0\n"
  54                              : "=r" (temp)
  55                              :
  56                              : "memory");
  57 }
  58
  59
  60 /*
  61  * disable IRQ/FIQ interrupts
  62  * returns true if interrupts had been enabled before we disabled them
  63  */
  64 int disable_interrupts (void)
  65 {
  66         unsigned long old,temp;
  67         __asm__ __volatile__("mrs %0, cpsr\n"
  68                              "orr %1, %0, #0xc0\n"
  69                              "msr cpsr_c, %1\n"
  70 #ifdef CONFIG_GTA02_REVISION
  71                              "mov %1, #0\n"
  72                              "mcr p15, 0, %1, c13, c0\n"
  73 #endif
  74                              : "=r" (old), "=r" (temp)
  75                              :
  76                              : "memory");
  77         return (old & 0x80) == 0;
  78 }
  79 #else
  80 void enable_interrupts (void)
  81 {
  82         return;
  83 }
  84 int disable_interrupts (void)
  85 {
  86         return 0;
  87 }
  88 #endif
  89
  90
  91 void bad_mode (void)
  92 {
  93         panic ("Resetting CPU ...\n");
  94         reset_cpu (0);
  95 }
  96
  97 void show_regs (struct pt_regs *regs)
  98 {
  99         unsigned long flags;
 100         const char *processor_modes[] = {
 101         "USER_26",      "FIQ_26",       "IRQ_26",       "SVC_26",
 102         "UK4_26",       "UK5_26",       "UK6_26",       "UK7_26",
 103         "UK8_26",       "UK9_26",       "UK10_26",      "UK11_26",
 104         "UK12_26",      "UK13_26",      "UK14_26",      "UK15_26",
 105         "USER_32",      "FIQ_32",       "IRQ_32",       "SVC_32",
 106         "UK4_32",       "UK5_32",       "UK6_32",       "ABT_32",
 107         "UK8_32",       "UK9_32",       "UK10_32",      "UND_32",
 108         "UK12_32",      "UK13_32",      "UK14_32",      "SYS_32",
 109         };
 110
 111         flags = condition_codes (regs);
 112
 113         printf ("pc : [<%08lx>]    lr : [<%08lx>]\n"
 114                 "sp : %08lx  ip : %08lx  fp : %08lx\n",
 115                 instruction_pointer (regs),
 116                 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
 117         printf ("r10: %08lx  r9 : %08lx  r8 : %08lx\n",
 118                 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
 119         printf ("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
 120                 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
 121         printf ("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
 122                 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
 123         printf ("Flags: %c%c%c%c",
 124                 flags & CC_N_BIT ? 'N' : 'n',
 125                 flags & CC_Z_BIT ? 'Z' : 'z',
 126                 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
 127         printf ("  IRQs %s  FIQs %s  Mode %s%s\n",
 128                 interrupts_enabled (regs) ? "on" : "off",
 129                 fast_interrupts_enabled (regs) ? "on" : "off",
 130                 processor_modes[processor_mode (regs)],
 131                 thumb_mode (regs) ? " (T)" : "");
 132 }
 133
 134 void do_undefined_instruction (struct pt_regs *pt_regs)
 135 {
 136         printf ("undefined instruction\n");
 137         show_regs (pt_regs);
 138         bad_mode ();
 139 }
 140
 141 void do_software_interrupt (struct pt_regs *pt_regs)
 142 {
 143         printf ("software interrupt\n");
 144         show_regs (pt_regs);
 145         bad_mode ();
 146 }
 147
 148 void do_prefetch_abort (struct pt_regs *pt_regs)
 149 {
 150         printf ("prefetch abort\n");
 151         show_regs (pt_regs);
 152         bad_mode ();
 153 }
 154
 155 void do_data_abort (struct pt_regs *pt_regs)
 156 {
 157         printf ("data abort\n");
 158         show_regs (pt_regs);
 159         bad_mode ();
 160 }
 161
 162 void do_not_used (struct pt_regs *pt_regs)
 163 {
 164         printf ("not used\n");
 165         show_regs (pt_regs);
 166         bad_mode ();
 167 }
 168
 169 void do_fiq (struct pt_regs *pt_regs)
 170 {
 171         printf ("fast interrupt request\n");
 172         show_regs (pt_regs);
 173         bad_mode ();
 174 }
 175
 176 #ifndef CONFIG_USE_IRQ
 177 void do_irq (struct pt_regs *pt_regs)
 178 {
 179         printf ("interrupt request\n");
 180         show_regs (pt_regs);
 181         bad_mode ();
 182 }
 183 #endif