1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2003 4 * Texas Instruments <www.ti.com> 5 * 6 * (C) Copyright 2002 7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 8 * Marius Groeger <mgroeger@sysgo.de> 9 * 10 * (C) Copyright 2002 11 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 12 * Alex Zuepke <azu@sysgo.de> 13 * 14 * (C) Copyright 2002-2004 15 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> 16 * 17 * (C) Copyright 2004 18 * Philippe Robin, ARM Ltd. <philippe.robin@arm.com> 19 */ 20 21 #include <common.h> 22 #include <efi_loader.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 int interrupt_init (void) 30 { 31 /* 32 * setup up stacks if necessary 33 */ 34 IRQ_STACK_START_IN = gd->irq_sp + 8; 35 36 return 0; 37 } 38 39 void enable_interrupts (void) 40 { 41 return; 42 } 43 int disable_interrupts (void) 44 { 45 return 0; 46 } 47 48 void bad_mode (void) 49 { 50 panic ("Resetting CPU ...\n"); 51 reset_cpu (0); 52 } 53 54 static void show_efi_loaded_images(struct pt_regs *regs) 55 { 56 efi_print_image_infos((void *)instruction_pointer(regs)); 57 } 58 59 void show_regs (struct pt_regs *regs) 60 { 61 unsigned long __maybe_unused flags; 62 const char __maybe_unused *processor_modes[] = { 63 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 64 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 65 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 66 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 67 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 68 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 69 "UK8_32", "UK9_32", "HYP_32", "UND_32", 70 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 71 }; 72 73 flags = condition_codes (regs); 74 75 printf("pc : [<%08lx>] lr : [<%08lx>]\n", 76 instruction_pointer(regs), regs->ARM_lr); 77 if (gd->flags & GD_FLG_RELOC) { 78 printf("reloc pc : [<%08lx>] lr : [<%08lx>]\n", 79 instruction_pointer(regs) - gd->reloc_off, 80 regs->ARM_lr - gd->reloc_off); 81 } 82 printf("sp : %08lx ip : %08lx fp : %08lx\n", 83 regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 84 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 85 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 86 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 87 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 88 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 89 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 90 printf ("Flags: %c%c%c%c", 91 flags & CC_N_BIT ? 'N' : 'n', 92 flags & CC_Z_BIT ? 'Z' : 'z', 93 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 94 printf (" IRQs %s FIQs %s Mode %s%s\n", 95 interrupts_enabled (regs) ? "on" : "off", 96 fast_interrupts_enabled (regs) ? "on" : "off", 97 processor_modes[processor_mode (regs)], 98 thumb_mode (regs) ? " (T)" : ""); 99 } 100 101 /* fixup PC to point to the instruction leading to the exception */ 102 static inline void fixup_pc(struct pt_regs *regs, int offset) 103 { 104 uint32_t pc = instruction_pointer(regs) + offset; 105 regs->ARM_pc = pc | (regs->ARM_pc & PCMASK); 106 } 107 108 void do_undefined_instruction (struct pt_regs *pt_regs) 109 { 110 efi_restore_gd(); 111 printf ("undefined instruction\n"); 112 fixup_pc(pt_regs, -4); 113 show_regs (pt_regs); 114 show_efi_loaded_images(pt_regs); 115 bad_mode (); 116 } 117 118 void do_software_interrupt (struct pt_regs *pt_regs) 119 { 120 efi_restore_gd(); 121 printf ("software interrupt\n"); 122 fixup_pc(pt_regs, -4); 123 show_regs (pt_regs); 124 show_efi_loaded_images(pt_regs); 125 bad_mode (); 126 } 127 128 void do_prefetch_abort (struct pt_regs *pt_regs) 129 { 130 efi_restore_gd(); 131 printf ("prefetch abort\n"); 132 fixup_pc(pt_regs, -8); 133 show_regs (pt_regs); 134 show_efi_loaded_images(pt_regs); 135 bad_mode (); 136 } 137 138 void do_data_abort (struct pt_regs *pt_regs) 139 { 140 efi_restore_gd(); 141 printf ("data abort\n"); 142 fixup_pc(pt_regs, -8); 143 show_regs (pt_regs); 144 show_efi_loaded_images(pt_regs); 145 bad_mode (); 146 } 147 148 void do_not_used (struct pt_regs *pt_regs) 149 { 150 efi_restore_gd(); 151 printf ("not used\n"); 152 fixup_pc(pt_regs, -8); 153 show_regs (pt_regs); 154 show_efi_loaded_images(pt_regs); 155 bad_mode (); 156 } 157 158 void do_fiq (struct pt_regs *pt_regs) 159 { 160 efi_restore_gd(); 161 printf ("fast interrupt request\n"); 162 fixup_pc(pt_regs, -8); 163 show_regs (pt_regs); 164 show_efi_loaded_images(pt_regs); 165 bad_mode (); 166 } 167 168 void do_irq (struct pt_regs *pt_regs) 169 { 170 efi_restore_gd(); 171 printf ("interrupt request\n"); 172 fixup_pc(pt_regs, -8); 173 show_regs (pt_regs); 174 show_efi_loaded_images(pt_regs); 175 bad_mode (); 176 } 177