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 #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) 50 IRQ_STACK_START = gd->irq_sp - 4; 51 IRQ_STACK_START_IN = gd->irq_sp + 8; 52 #else 53 IRQ_STACK_START = _armboot_start - CONFIG_SYS_MALLOC_LEN - CONFIG_SYS_GBL_DATA_SIZE - 4; 54 #endif 55 FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ; 56 57 return arch_interrupt_init(); 58 } 59 60 /* enable IRQ interrupts */ 61 void enable_interrupts (void) 62 { 63 unsigned long temp; 64 __asm__ __volatile__("mrs %0, cpsr\n" 65 "bic %0, %0, #0x80\n" 66 "msr cpsr_c, %0" 67 : "=r" (temp) 68 : 69 : "memory"); 70 } 71 72 73 /* 74 * disable IRQ/FIQ interrupts 75 * returns true if interrupts had been enabled before we disabled them 76 */ 77 int disable_interrupts (void) 78 { 79 unsigned long old,temp; 80 __asm__ __volatile__("mrs %0, cpsr\n" 81 "orr %1, %0, #0xc0\n" 82 "msr cpsr_c, %1" 83 : "=r" (old), "=r" (temp) 84 : 85 : "memory"); 86 return (old & 0x80) == 0; 87 } 88 #else 89 #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) 90 int interrupt_init (void) 91 { 92 /* 93 * setup up stacks if necessary 94 */ 95 IRQ_STACK_START_IN = gd->irq_sp + 8; 96 97 return 0; 98 } 99 #endif 100 101 void enable_interrupts (void) 102 { 103 return; 104 } 105 int disable_interrupts (void) 106 { 107 return 0; 108 } 109 #endif 110 111 112 void bad_mode (void) 113 { 114 panic ("Resetting CPU ...\n"); 115 reset_cpu (0); 116 } 117 118 void show_regs (struct pt_regs *regs) 119 { 120 unsigned long flags; 121 const char *processor_modes[] = { 122 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 123 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 124 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 125 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 126 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 127 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 128 "UK8_32", "UK9_32", "UK10_32", "UND_32", 129 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 130 }; 131 132 flags = condition_codes (regs); 133 134 printf ("pc : [<%08lx>] lr : [<%08lx>]\n" 135 "sp : %08lx ip : %08lx fp : %08lx\n", 136 instruction_pointer (regs), 137 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 138 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 139 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 140 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 141 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 142 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 143 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 144 printf ("Flags: %c%c%c%c", 145 flags & CC_N_BIT ? 'N' : 'n', 146 flags & CC_Z_BIT ? 'Z' : 'z', 147 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 148 printf (" IRQs %s FIQs %s Mode %s%s\n", 149 interrupts_enabled (regs) ? "on" : "off", 150 fast_interrupts_enabled (regs) ? "on" : "off", 151 processor_modes[processor_mode (regs)], 152 thumb_mode (regs) ? " (T)" : ""); 153 } 154 155 void do_undefined_instruction (struct pt_regs *pt_regs) 156 { 157 printf ("undefined instruction\n"); 158 show_regs (pt_regs); 159 bad_mode (); 160 } 161 162 void do_software_interrupt (struct pt_regs *pt_regs) 163 { 164 printf ("software interrupt\n"); 165 show_regs (pt_regs); 166 bad_mode (); 167 } 168 169 void do_prefetch_abort (struct pt_regs *pt_regs) 170 { 171 printf ("prefetch abort\n"); 172 show_regs (pt_regs); 173 bad_mode (); 174 } 175 176 void do_data_abort (struct pt_regs *pt_regs) 177 { 178 printf ("data abort\n"); 179 show_regs (pt_regs); 180 bad_mode (); 181 } 182 183 void do_not_used (struct pt_regs *pt_regs) 184 { 185 printf ("not used\n"); 186 show_regs (pt_regs); 187 bad_mode (); 188 } 189 190 void do_fiq (struct pt_regs *pt_regs) 191 { 192 printf ("fast interrupt request\n"); 193 show_regs (pt_regs); 194 bad_mode (); 195 } 196 197 #ifndef CONFIG_USE_IRQ 198 void do_irq (struct pt_regs *pt_regs) 199 { 200 printf ("interrupt request\n"); 201 show_regs (pt_regs); 202 bad_mode (); 203 } 204 #endif 205