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 #include <asm/u-boot-arm.h> 25 26 DECLARE_GLOBAL_DATA_PTR; 27 28 #ifdef CONFIG_USE_IRQ 29 int interrupt_init (void) 30 { 31 /* 32 * setup up stacks if necessary 33 */ 34 IRQ_STACK_START = gd->irq_sp - 4; 35 IRQ_STACK_START_IN = gd->irq_sp + 8; 36 FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ; 37 38 return arch_interrupt_init(); 39 } 40 41 /* enable IRQ interrupts */ 42 void enable_interrupts (void) 43 { 44 unsigned long temp; 45 __asm__ __volatile__("mrs %0, cpsr\n" 46 "bic %0, %0, #0x80\n" 47 "msr cpsr_c, %0" 48 : "=r" (temp) 49 : 50 : "memory"); 51 } 52 53 54 /* 55 * disable IRQ/FIQ interrupts 56 * returns true if interrupts had been enabled before we disabled them 57 */ 58 int disable_interrupts (void) 59 { 60 unsigned long old,temp; 61 __asm__ __volatile__("mrs %0, cpsr\n" 62 "orr %1, %0, #0xc0\n" 63 "msr cpsr_c, %1" 64 : "=r" (old), "=r" (temp) 65 : 66 : "memory"); 67 return (old & 0x80) == 0; 68 } 69 #else 70 int interrupt_init (void) 71 { 72 /* 73 * setup up stacks if necessary 74 */ 75 IRQ_STACK_START_IN = gd->irq_sp + 8; 76 77 return 0; 78 } 79 80 void enable_interrupts (void) 81 { 82 return; 83 } 84 int disable_interrupts (void) 85 { 86 return 0; 87 } 88 #endif 89 90 91 void bad_mode (void) 92 { 93 panic ("Resetting CPU ...\n"); 94 reset_cpu (0); 95 } 96 97 void show_regs (struct pt_regs *regs) 98 { 99 unsigned long flags; 100 const char *processor_modes[] = { 101 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 102 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 103 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 104 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 105 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 106 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 107 "UK8_32", "UK9_32", "HYP_32", "UND_32", 108 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 109 }; 110 111 flags = condition_codes (regs); 112 113 printf ("pc : [<%08lx>] lr : [<%08lx>]\n" 114 "sp : %08lx ip : %08lx fp : %08lx\n", 115 instruction_pointer (regs), 116 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 117 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 118 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 119 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 120 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 121 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 122 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 123 printf ("Flags: %c%c%c%c", 124 flags & CC_N_BIT ? 'N' : 'n', 125 flags & CC_Z_BIT ? 'Z' : 'z', 126 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 127 printf (" IRQs %s FIQs %s Mode %s%s\n", 128 interrupts_enabled (regs) ? "on" : "off", 129 fast_interrupts_enabled (regs) ? "on" : "off", 130 processor_modes[processor_mode (regs)], 131 thumb_mode (regs) ? " (T)" : ""); 132 } 133 134 void do_undefined_instruction (struct pt_regs *pt_regs) 135 { 136 printf ("undefined instruction\n"); 137 show_regs (pt_regs); 138 bad_mode (); 139 } 140 141 void do_software_interrupt (struct pt_regs *pt_regs) 142 { 143 printf ("software interrupt\n"); 144 show_regs (pt_regs); 145 bad_mode (); 146 } 147 148 void do_prefetch_abort (struct pt_regs *pt_regs) 149 { 150 printf ("prefetch abort\n"); 151 show_regs (pt_regs); 152 bad_mode (); 153 } 154 155 void do_data_abort (struct pt_regs *pt_regs) 156 { 157 printf ("data abort\n"); 158 show_regs (pt_regs); 159 bad_mode (); 160 } 161 162 void do_not_used (struct pt_regs *pt_regs) 163 { 164 printf ("not used\n"); 165 show_regs (pt_regs); 166 bad_mode (); 167 } 168 169 void do_fiq (struct pt_regs *pt_regs) 170 { 171 printf ("fast interrupt request\n"); 172 show_regs (pt_regs); 173 bad_mode (); 174 } 175 176 #ifndef CONFIG_USE_IRQ 177 void do_irq (struct pt_regs *pt_regs) 178 { 179 printf ("interrupt request\n"); 180 show_regs (pt_regs); 181 bad_mode (); 182 } 183 #endif 184