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, <garyj@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 DECLARE_GLOBAL_DATA_PTR; 42 43 #ifdef CONFIG_USE_IRQ 44 int interrupt_init (void) 45 { 46 /* 47 * setup up stacks if necessary 48 */ 49 IRQ_STACK_START = gd->irq_sp - 4; 50 IRQ_STACK_START_IN = gd->irq_sp + 8; 51 FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ; 52 53 return arch_interrupt_init(); 54 } 55 56 /* enable IRQ interrupts */ 57 void enable_interrupts (void) 58 { 59 unsigned long temp; 60 __asm__ __volatile__("mrs %0, cpsr\n" 61 "bic %0, %0, #0x80\n" 62 "msr cpsr_c, %0" 63 : "=r" (temp) 64 : 65 : "memory"); 66 } 67 68 69 /* 70 * disable IRQ/FIQ interrupts 71 * returns true if interrupts had been enabled before we disabled them 72 */ 73 int disable_interrupts (void) 74 { 75 unsigned long old,temp; 76 __asm__ __volatile__("mrs %0, cpsr\n" 77 "orr %1, %0, #0xc0\n" 78 "msr cpsr_c, %1" 79 : "=r" (old), "=r" (temp) 80 : 81 : "memory"); 82 return (old & 0x80) == 0; 83 } 84 #else 85 int interrupt_init (void) 86 { 87 /* 88 * setup up stacks if necessary 89 */ 90 IRQ_STACK_START_IN = gd->irq_sp + 8; 91 92 return 0; 93 } 94 95 void enable_interrupts (void) 96 { 97 return; 98 } 99 int disable_interrupts (void) 100 { 101 return 0; 102 } 103 #endif 104 105 106 void bad_mode (void) 107 { 108 panic ("Resetting CPU ...\n"); 109 reset_cpu (0); 110 } 111 112 void show_regs (struct pt_regs *regs) 113 { 114 unsigned long flags; 115 const char *processor_modes[] = { 116 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 117 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 118 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 119 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 120 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 121 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 122 "UK8_32", "UK9_32", "UK10_32", "UND_32", 123 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 124 }; 125 126 flags = condition_codes (regs); 127 128 printf ("pc : [<%08lx>] lr : [<%08lx>]\n" 129 "sp : %08lx ip : %08lx fp : %08lx\n", 130 instruction_pointer (regs), 131 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 132 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 133 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 134 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 135 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 136 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 137 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 138 printf ("Flags: %c%c%c%c", 139 flags & CC_N_BIT ? 'N' : 'n', 140 flags & CC_Z_BIT ? 'Z' : 'z', 141 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 142 printf (" IRQs %s FIQs %s Mode %s%s\n", 143 interrupts_enabled (regs) ? "on" : "off", 144 fast_interrupts_enabled (regs) ? "on" : "off", 145 processor_modes[processor_mode (regs)], 146 thumb_mode (regs) ? " (T)" : ""); 147 } 148 149 void do_undefined_instruction (struct pt_regs *pt_regs) 150 { 151 printf ("undefined instruction\n"); 152 show_regs (pt_regs); 153 bad_mode (); 154 } 155 156 void do_software_interrupt (struct pt_regs *pt_regs) 157 { 158 printf ("software interrupt\n"); 159 show_regs (pt_regs); 160 bad_mode (); 161 } 162 163 void do_prefetch_abort (struct pt_regs *pt_regs) 164 { 165 printf ("prefetch abort\n"); 166 show_regs (pt_regs); 167 bad_mode (); 168 } 169 170 void do_data_abort (struct pt_regs *pt_regs) 171 { 172 printf ("data abort\n"); 173 show_regs (pt_regs); 174 bad_mode (); 175 } 176 177 void do_not_used (struct pt_regs *pt_regs) 178 { 179 printf ("not used\n"); 180 show_regs (pt_regs); 181 bad_mode (); 182 } 183 184 void do_fiq (struct pt_regs *pt_regs) 185 { 186 printf ("fast interrupt request\n"); 187 show_regs (pt_regs); 188 bad_mode (); 189 } 190 191 #ifndef CONFIG_USE_IRQ 192 void do_irq (struct pt_regs *pt_regs) 193 { 194 printf ("interrupt request\n"); 195 show_regs (pt_regs); 196 bad_mode (); 197 } 198 #endif 199