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 26 DECLARE_GLOBAL_DATA_PTR; 27 28 int interrupt_init (void) 29 { 30 /* 31 * setup up stacks if necessary 32 */ 33 IRQ_STACK_START_IN = gd->irq_sp + 8; 34 35 return 0; 36 } 37 38 void enable_interrupts (void) 39 { 40 return; 41 } 42 int disable_interrupts (void) 43 { 44 return 0; 45 } 46 47 void bad_mode (void) 48 { 49 panic ("Resetting CPU ...\n"); 50 reset_cpu (0); 51 } 52 53 static void show_efi_loaded_images(struct pt_regs *regs) 54 { 55 efi_print_image_infos((void *)instruction_pointer(regs)); 56 } 57 58 static void dump_instr(struct pt_regs *regs) 59 { 60 unsigned long addr = instruction_pointer(regs); 61 const int thumb = thumb_mode(regs); 62 const int width = thumb ? 4 : 8; 63 int i; 64 65 if (thumb) 66 addr &= ~1L; 67 else 68 addr &= ~3L; 69 printf("Code: "); 70 for (i = -4; i < 1 + !!thumb; i++) { 71 unsigned int val; 72 73 if (thumb) 74 val = ((u16 *)addr)[i]; 75 else 76 val = ((u32 *)addr)[i]; 77 printf(i == 0 ? "(%0*x) " : "%0*x ", width, val); 78 } 79 printf("\n"); 80 } 81 82 void show_regs (struct pt_regs *regs) 83 { 84 unsigned long __maybe_unused flags; 85 const char __maybe_unused *processor_modes[] = { 86 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 87 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 88 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 89 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 90 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 91 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 92 "UK8_32", "UK9_32", "HYP_32", "UND_32", 93 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 94 }; 95 96 flags = condition_codes (regs); 97 98 printf("pc : [<%08lx>] lr : [<%08lx>]\n", 99 instruction_pointer(regs), regs->ARM_lr); 100 if (gd->flags & GD_FLG_RELOC) { 101 printf("reloc pc : [<%08lx>] lr : [<%08lx>]\n", 102 instruction_pointer(regs) - gd->reloc_off, 103 regs->ARM_lr - gd->reloc_off); 104 } 105 printf("sp : %08lx ip : %08lx fp : %08lx\n", 106 regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 107 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 108 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 109 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 110 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 111 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 112 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 113 printf ("Flags: %c%c%c%c", 114 flags & CC_N_BIT ? 'N' : 'n', 115 flags & CC_Z_BIT ? 'Z' : 'z', 116 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 117 printf (" IRQs %s FIQs %s Mode %s%s\n", 118 interrupts_enabled (regs) ? "on" : "off", 119 fast_interrupts_enabled (regs) ? "on" : "off", 120 processor_modes[processor_mode (regs)], 121 thumb_mode (regs) ? " (T)" : ""); 122 dump_instr(regs); 123 } 124 125 /* fixup PC to point to the instruction leading to the exception */ 126 static inline void fixup_pc(struct pt_regs *regs, int offset) 127 { 128 uint32_t pc = instruction_pointer(regs) + offset; 129 regs->ARM_pc = pc | (regs->ARM_pc & PCMASK); 130 } 131 132 void do_undefined_instruction (struct pt_regs *pt_regs) 133 { 134 efi_restore_gd(); 135 printf ("undefined instruction\n"); 136 fixup_pc(pt_regs, -4); 137 show_regs (pt_regs); 138 show_efi_loaded_images(pt_regs); 139 bad_mode (); 140 } 141 142 void do_software_interrupt (struct pt_regs *pt_regs) 143 { 144 efi_restore_gd(); 145 printf ("software interrupt\n"); 146 fixup_pc(pt_regs, -4); 147 show_regs (pt_regs); 148 show_efi_loaded_images(pt_regs); 149 bad_mode (); 150 } 151 152 void do_prefetch_abort (struct pt_regs *pt_regs) 153 { 154 efi_restore_gd(); 155 printf ("prefetch abort\n"); 156 fixup_pc(pt_regs, -8); 157 show_regs (pt_regs); 158 show_efi_loaded_images(pt_regs); 159 bad_mode (); 160 } 161 162 void do_data_abort (struct pt_regs *pt_regs) 163 { 164 efi_restore_gd(); 165 printf ("data abort\n"); 166 fixup_pc(pt_regs, -8); 167 show_regs (pt_regs); 168 show_efi_loaded_images(pt_regs); 169 bad_mode (); 170 } 171 172 void do_not_used (struct pt_regs *pt_regs) 173 { 174 efi_restore_gd(); 175 printf ("not used\n"); 176 fixup_pc(pt_regs, -8); 177 show_regs (pt_regs); 178 show_efi_loaded_images(pt_regs); 179 bad_mode (); 180 } 181 182 void do_fiq (struct pt_regs *pt_regs) 183 { 184 efi_restore_gd(); 185 printf ("fast interrupt request\n"); 186 fixup_pc(pt_regs, -8); 187 show_regs (pt_regs); 188 show_efi_loaded_images(pt_regs); 189 bad_mode (); 190 } 191 192 void do_irq (struct pt_regs *pt_regs) 193 { 194 efi_restore_gd(); 195 printf ("interrupt request\n"); 196 fixup_pc(pt_regs, -8); 197 show_regs (pt_regs); 198 show_efi_loaded_images(pt_regs); 199 bad_mode (); 200 } 201