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 #include <efi_loader.h> 26 27 DECLARE_GLOBAL_DATA_PTR; 28 29 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_IRQ) 30 int interrupt_init (void) 31 { 32 /* 33 * setup up stacks if necessary 34 */ 35 IRQ_STACK_START_IN = gd->irq_sp + 8; 36 37 return 0; 38 } 39 40 void enable_interrupts (void) 41 { 42 return; 43 } 44 int disable_interrupts (void) 45 { 46 return 0; 47 } 48 #endif 49 50 void bad_mode (void) 51 { 52 panic ("Resetting CPU ...\n"); 53 reset_cpu (0); 54 } 55 56 void show_regs (struct pt_regs *regs) 57 { 58 unsigned long __maybe_unused flags; 59 const char __maybe_unused *processor_modes[] = { 60 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 61 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 62 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 63 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 64 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 65 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 66 "UK8_32", "UK9_32", "HYP_32", "UND_32", 67 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 68 }; 69 70 flags = condition_codes (regs); 71 72 printf("pc : [<%08lx>] lr : [<%08lx>]\n", 73 instruction_pointer(regs), regs->ARM_lr); 74 if (gd->flags & GD_FLG_RELOC) { 75 printf("reloc pc : [<%08lx>] lr : [<%08lx>]\n", 76 instruction_pointer(regs) - gd->reloc_off, 77 regs->ARM_lr - gd->reloc_off); 78 } 79 printf("sp : %08lx ip : %08lx fp : %08lx\n", 80 regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 81 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 82 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 83 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 84 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 85 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 86 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 87 printf ("Flags: %c%c%c%c", 88 flags & CC_N_BIT ? 'N' : 'n', 89 flags & CC_Z_BIT ? 'Z' : 'z', 90 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 91 printf (" IRQs %s FIQs %s Mode %s%s\n", 92 interrupts_enabled (regs) ? "on" : "off", 93 fast_interrupts_enabled (regs) ? "on" : "off", 94 processor_modes[processor_mode (regs)], 95 thumb_mode (regs) ? " (T)" : ""); 96 } 97 98 /* fixup PC to point to the instruction leading to the exception */ 99 static inline void fixup_pc(struct pt_regs *regs, int offset) 100 { 101 uint32_t pc = instruction_pointer(regs) + offset; 102 regs->ARM_pc = pc | (regs->ARM_pc & PCMASK); 103 } 104 105 void do_undefined_instruction (struct pt_regs *pt_regs) 106 { 107 efi_restore_gd(); 108 printf ("undefined instruction\n"); 109 fixup_pc(pt_regs, -4); 110 show_regs (pt_regs); 111 bad_mode (); 112 } 113 114 void do_software_interrupt (struct pt_regs *pt_regs) 115 { 116 efi_restore_gd(); 117 printf ("software interrupt\n"); 118 fixup_pc(pt_regs, -4); 119 show_regs (pt_regs); 120 bad_mode (); 121 } 122 123 void do_prefetch_abort (struct pt_regs *pt_regs) 124 { 125 efi_restore_gd(); 126 printf ("prefetch abort\n"); 127 fixup_pc(pt_regs, -8); 128 show_regs (pt_regs); 129 bad_mode (); 130 } 131 132 void do_data_abort (struct pt_regs *pt_regs) 133 { 134 efi_restore_gd(); 135 printf ("data abort\n"); 136 fixup_pc(pt_regs, -8); 137 show_regs (pt_regs); 138 bad_mode (); 139 } 140 141 void do_not_used (struct pt_regs *pt_regs) 142 { 143 efi_restore_gd(); 144 printf ("not used\n"); 145 fixup_pc(pt_regs, -8); 146 show_regs (pt_regs); 147 bad_mode (); 148 } 149 150 void do_fiq (struct pt_regs *pt_regs) 151 { 152 efi_restore_gd(); 153 printf ("fast interrupt request\n"); 154 fixup_pc(pt_regs, -8); 155 show_regs (pt_regs); 156 bad_mode (); 157 } 158 159 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_IRQ) 160 void do_irq (struct pt_regs *pt_regs) 161 { 162 efi_restore_gd(); 163 printf ("interrupt request\n"); 164 fixup_pc(pt_regs, -8); 165 show_regs (pt_regs); 166 bad_mode (); 167 } 168 #endif 169