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 <efi_loader.h> 24 #include <asm/proc-armv/ptrace.h> 25 #include <asm/u-boot-arm.h> 26 #include <efi_loader.h> 27 28 DECLARE_GLOBAL_DATA_PTR; 29 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 49 void bad_mode (void) 50 { 51 panic ("Resetting CPU ...\n"); 52 reset_cpu (0); 53 } 54 55 static void show_efi_loaded_images(struct pt_regs *regs) 56 { 57 efi_print_image_infos((void *)instruction_pointer(regs)); 58 } 59 60 void show_regs (struct pt_regs *regs) 61 { 62 unsigned long __maybe_unused flags; 63 const char __maybe_unused *processor_modes[] = { 64 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 65 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 66 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 67 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 68 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 69 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 70 "UK8_32", "UK9_32", "HYP_32", "UND_32", 71 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 72 }; 73 74 flags = condition_codes (regs); 75 76 printf("pc : [<%08lx>] lr : [<%08lx>]\n", 77 instruction_pointer(regs), regs->ARM_lr); 78 if (gd->flags & GD_FLG_RELOC) { 79 printf("reloc pc : [<%08lx>] lr : [<%08lx>]\n", 80 instruction_pointer(regs) - gd->reloc_off, 81 regs->ARM_lr - gd->reloc_off); 82 } 83 printf("sp : %08lx ip : %08lx fp : %08lx\n", 84 regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 85 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 86 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 87 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 88 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 89 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 90 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 91 printf ("Flags: %c%c%c%c", 92 flags & CC_N_BIT ? 'N' : 'n', 93 flags & CC_Z_BIT ? 'Z' : 'z', 94 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 95 printf (" IRQs %s FIQs %s Mode %s%s\n", 96 interrupts_enabled (regs) ? "on" : "off", 97 fast_interrupts_enabled (regs) ? "on" : "off", 98 processor_modes[processor_mode (regs)], 99 thumb_mode (regs) ? " (T)" : ""); 100 } 101 102 /* fixup PC to point to the instruction leading to the exception */ 103 static inline void fixup_pc(struct pt_regs *regs, int offset) 104 { 105 uint32_t pc = instruction_pointer(regs) + offset; 106 regs->ARM_pc = pc | (regs->ARM_pc & PCMASK); 107 } 108 109 void do_undefined_instruction (struct pt_regs *pt_regs) 110 { 111 efi_restore_gd(); 112 printf ("undefined instruction\n"); 113 fixup_pc(pt_regs, -4); 114 show_regs (pt_regs); 115 show_efi_loaded_images(pt_regs); 116 bad_mode (); 117 } 118 119 void do_software_interrupt (struct pt_regs *pt_regs) 120 { 121 efi_restore_gd(); 122 printf ("software interrupt\n"); 123 fixup_pc(pt_regs, -4); 124 show_regs (pt_regs); 125 show_efi_loaded_images(pt_regs); 126 bad_mode (); 127 } 128 129 void do_prefetch_abort (struct pt_regs *pt_regs) 130 { 131 efi_restore_gd(); 132 printf ("prefetch abort\n"); 133 fixup_pc(pt_regs, -8); 134 show_regs (pt_regs); 135 show_efi_loaded_images(pt_regs); 136 bad_mode (); 137 } 138 139 void do_data_abort (struct pt_regs *pt_regs) 140 { 141 efi_restore_gd(); 142 printf ("data abort\n"); 143 fixup_pc(pt_regs, -8); 144 show_regs (pt_regs); 145 show_efi_loaded_images(pt_regs); 146 bad_mode (); 147 } 148 149 void do_not_used (struct pt_regs *pt_regs) 150 { 151 efi_restore_gd(); 152 printf ("not used\n"); 153 fixup_pc(pt_regs, -8); 154 show_regs (pt_regs); 155 show_efi_loaded_images(pt_regs); 156 bad_mode (); 157 } 158 159 void do_fiq (struct pt_regs *pt_regs) 160 { 161 efi_restore_gd(); 162 printf ("fast interrupt request\n"); 163 fixup_pc(pt_regs, -8); 164 show_regs (pt_regs); 165 show_efi_loaded_images(pt_regs); 166 bad_mode (); 167 } 168 169 void do_irq (struct pt_regs *pt_regs) 170 { 171 efi_restore_gd(); 172 printf ("interrupt request\n"); 173 fixup_pc(pt_regs, -8); 174 show_regs (pt_regs); 175 show_efi_loaded_images(pt_regs); 176 bad_mode (); 177 } 178