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 * SPDX-License-Identifier: GPL-2.0+ 20 */ 21 22 #include <common.h> 23 #include <asm/proc-armv/ptrace.h> 24 25 DECLARE_GLOBAL_DATA_PTR; 26 27 #ifdef CONFIG_USE_IRQ 28 int interrupt_init (void) 29 { 30 /* 31 * setup up stacks if necessary 32 */ 33 IRQ_STACK_START = gd->irq_sp - 4; 34 IRQ_STACK_START_IN = gd->irq_sp + 8; 35 FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ; 36 37 return arch_interrupt_init(); 38 } 39 40 /* enable IRQ interrupts */ 41 void enable_interrupts (void) 42 { 43 unsigned long temp; 44 __asm__ __volatile__("mrs %0, cpsr\n" 45 "bic %0, %0, #0x80\n" 46 "msr cpsr_c, %0" 47 : "=r" (temp) 48 : 49 : "memory"); 50 } 51 52 53 /* 54 * disable IRQ/FIQ interrupts 55 * returns true if interrupts had been enabled before we disabled them 56 */ 57 int disable_interrupts (void) 58 { 59 unsigned long old,temp; 60 __asm__ __volatile__("mrs %0, cpsr\n" 61 "orr %1, %0, #0xc0\n" 62 "msr cpsr_c, %1" 63 : "=r" (old), "=r" (temp) 64 : 65 : "memory"); 66 return (old & 0x80) == 0; 67 } 68 #else 69 int interrupt_init (void) 70 { 71 /* 72 * setup up stacks if necessary 73 */ 74 IRQ_STACK_START_IN = gd->irq_sp + 8; 75 76 return 0; 77 } 78 79 void enable_interrupts (void) 80 { 81 return; 82 } 83 int disable_interrupts (void) 84 { 85 return 0; 86 } 87 #endif 88 89 90 void bad_mode (void) 91 { 92 panic ("Resetting CPU ...\n"); 93 reset_cpu (0); 94 } 95 96 void show_regs (struct pt_regs *regs) 97 { 98 unsigned long flags; 99 const char *processor_modes[] = { 100 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 101 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 102 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 103 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 104 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 105 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 106 "UK8_32", "UK9_32", "UK10_32", "UND_32", 107 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 108 }; 109 110 flags = condition_codes (regs); 111 112 printf ("pc : [<%08lx>] lr : [<%08lx>]\n" 113 "sp : %08lx ip : %08lx fp : %08lx\n", 114 instruction_pointer (regs), 115 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 116 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 117 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 118 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 119 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 120 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 121 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 122 printf ("Flags: %c%c%c%c", 123 flags & CC_N_BIT ? 'N' : 'n', 124 flags & CC_Z_BIT ? 'Z' : 'z', 125 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 126 printf (" IRQs %s FIQs %s Mode %s%s\n", 127 interrupts_enabled (regs) ? "on" : "off", 128 fast_interrupts_enabled (regs) ? "on" : "off", 129 processor_modes[processor_mode (regs)], 130 thumb_mode (regs) ? " (T)" : ""); 131 } 132 133 void do_undefined_instruction (struct pt_regs *pt_regs) 134 { 135 printf ("undefined instruction\n"); 136 show_regs (pt_regs); 137 bad_mode (); 138 } 139 140 void do_software_interrupt (struct pt_regs *pt_regs) 141 { 142 printf ("software interrupt\n"); 143 show_regs (pt_regs); 144 bad_mode (); 145 } 146 147 void do_prefetch_abort (struct pt_regs *pt_regs) 148 { 149 printf ("prefetch abort\n"); 150 show_regs (pt_regs); 151 bad_mode (); 152 } 153 154 void do_data_abort (struct pt_regs *pt_regs) 155 { 156 printf ("data abort\n\n MAYBE you should read doc/README.arm-unaligned-accesses\n\n"); 157 show_regs (pt_regs); 158 bad_mode (); 159 } 160 161 void do_not_used (struct pt_regs *pt_regs) 162 { 163 printf ("not used\n"); 164 show_regs (pt_regs); 165 bad_mode (); 166 } 167 168 void do_fiq (struct pt_regs *pt_regs) 169 { 170 printf ("fast interrupt request\n"); 171 show_regs (pt_regs); 172 bad_mode (); 173 } 174 175 #ifndef CONFIG_USE_IRQ 176 void do_irq (struct pt_regs *pt_regs) 177 { 178 printf ("interrupt request\n"); 179 show_regs (pt_regs); 180 bad_mode (); 181 } 182 #endif 183