cpu/arm_intcm/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 #ifndef CONFIG_INTEGRATOR
  42 /* Only to be used for integrator/AP or /CP */
  43 /* Allows U-Boot to be used with any ARM supplied core module (CM),
  44  * provided the ARM boot monitor, or similar software,
  45  * runs first to set up the platform e.g. map writeable memory to 0x00000000
  46  * - see Integrator User Guides
  47  * Versatile has a supported cpu - arm926ejs
  48  * Some integrator CMs cpus are supported
  49  * CM926EJ-S, CM946E-S
  50  * For platforms with supported cpus U-Boot can be used as the sole boot
  51  * monitor/loader - it will configure the platform itself
  52  * Also U-Boot may be faster/smaller in those cases since specific
  53  * qualities of the cpu and/or CM can be used e.g i and/or d caches etc.
  54  */
  55 #endif
  56 extern void reset_cpu(ulong addr);
  57
  58 #ifdef CONFIG_USE_IRQ
  59 /* enable IRQ interrupts */
  60 void enable_interrupts (void)
  61 {
  62         unsigned long temp;
  63         __asm__ __volatile__("mrs %0, cpsr\n"
  64                              "bic %0, %0, #0x80\n"
  65                              "msr cpsr_c, %0"
  66                              : "=r" (temp)
  67                              :
  68                              : "memory");
  69 }
  70
  71
  72 /*
  73  * disable IRQ/FIQ interrupts
  74  * returns true if interrupts had been enabled before we disabled them
  75  */
  76 int disable_interrupts (void)
  77 {
  78         unsigned long old,temp;
  79         __asm__ __volatile__("mrs %0, cpsr\n"
  80                              "orr %1, %0, #0xc0\n"
  81                              "msr cpsr_c, %1"
  82                              : "=r" (old), "=r" (temp)
  83                              :
  84                              : "memory");
  85         return (old & 0x80) == 0;
  86 }
  87 #else
  88 void enable_interrupts (void)
  89 {
  90         return;
  91 }
  92 int disable_interrupts (void)
  93 {
  94         return 0;
  95 }
  96 #endif
  97
  98
  99 void bad_mode (void)
 100 {
 101         panic ("Resetting CPU ...\n");
 102         reset_cpu (0);
 103 }
 104
 105 void show_regs (struct pt_regs *regs)
 106 {
 107         unsigned long flags;
 108         const char *processor_modes[] = {
 109         "USER_26",      "FIQ_26",       "IRQ_26",       "SVC_26",
 110         "UK4_26",       "UK5_26",       "UK6_26",       "UK7_26",
 111         "UK8_26",       "UK9_26",       "UK10_26",      "UK11_26",
 112         "UK12_26",      "UK13_26",      "UK14_26",      "UK15_26",
 113         "USER_32",      "FIQ_32",       "IRQ_32",       "SVC_32",
 114         "UK4_32",       "UK5_32",       "UK6_32",       "ABT_32",
 115         "UK8_32",       "UK9_32",       "UK10_32",      "UND_32",
 116         "UK12_32",      "UK13_32",      "UK14_32",      "SYS_32",
 117         };
 118
 119         flags = condition_codes (regs);
 120
 121         printf ("pc : [<%08lx>]    lr : [<%08lx>]\n"
 122                 "sp : %08lx  ip : %08lx  fp : %08lx\n",
 123                 instruction_pointer (regs),
 124                 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
 125         printf ("r10: %08lx  r9 : %08lx  r8 : %08lx\n",
 126                 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
 127         printf ("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
 128                 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
 129         printf ("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
 130                 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
 131         printf ("Flags: %c%c%c%c",
 132                 flags & CC_N_BIT ? 'N' : 'n',
 133                 flags & CC_Z_BIT ? 'Z' : 'z',
 134                 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
 135         printf ("  IRQs %s  FIQs %s  Mode %s%s\n",
 136                 interrupts_enabled (regs) ? "on" : "off",
 137                 fast_interrupts_enabled (regs) ? "on" : "off",
 138                 processor_modes[processor_mode (regs)],
 139                 thumb_mode (regs) ? " (T)" : "");
 140 }
 141
 142 void do_undefined_instruction (struct pt_regs *pt_regs)
 143 {
 144         printf ("undefined instruction\n");
 145         show_regs (pt_regs);
 146         bad_mode ();
 147 }
 148
 149 void do_software_interrupt (struct pt_regs *pt_regs)
 150 {
 151         printf ("software interrupt\n");
 152         show_regs (pt_regs);
 153         bad_mode ();
 154 }
 155
 156 void do_prefetch_abort (struct pt_regs *pt_regs)
 157 {
 158         printf ("prefetch abort\n");
 159         show_regs (pt_regs);
 160         bad_mode ();
 161 }
 162
 163 void do_data_abort (struct pt_regs *pt_regs)
 164 {
 165         printf ("data abort\n");
 166         show_regs (pt_regs);
 167         bad_mode ();
 168 }
 169
 170 void do_not_used (struct pt_regs *pt_regs)
 171 {
 172         printf ("not used\n");
 173         show_regs (pt_regs);
 174         bad_mode ();
 175 }
 176
 177 void do_fiq (struct pt_regs *pt_regs)
 178 {
 179         printf ("fast interrupt request\n");
 180         show_regs (pt_regs);
 181         bad_mode ();
 182 }
 183
 184 void do_irq (struct pt_regs *pt_regs)
 185 {
 186         printf ("interrupt request\n");
 187         show_regs (pt_regs);
 188         bad_mode ();
 189 }
 190
 191 /* The timer functionality is supplied by the Integrator board */
 192 /* - see board/integrator<>.c */