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