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 (at) sysgo.de> 9 * 10 * (C) Copyright 2002 11 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 12 * Alex Zuepke <azu (at) sysgo.de> 13 * 14 * (C) Copyright 2002-2004 15 * Gary Jennejohn, DENX Software Engineering, <garyj (at) denx.de> 16 * 17 * (C) Copyright 2004 18 * Philippe Robin, ARM Ltd. <philippe.robin (at) 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 static void dump_instr(struct pt_regs *regs) 60 { 61 unsigned long addr = instruction_pointer(regs); 62 const int thumb = thumb_mode(regs); 63 const int width = thumb ? 4 : 8; 64 int i; 65 66 if (thumb) 67 addr &= ~1L; 68 else 69 addr &= ~3L; 70 printf("Code: "); 71 for (i = -4; i < 1 + !!thumb; i++) { 72 unsigned int val; 73 74 if (thumb) 75 val = ((u16 *)addr)[i]; 76 else 77 val = ((u32 *)addr)[i]; 78 printf(i == 0 ? "(%0*x) " : "%0*x ", width, val); 79 } 80 printf("\n"); 81 } 82 83 void show_regs (struct pt_regs *regs) 84 { 85 unsigned long __maybe_unused flags; 86 const char __maybe_unused *processor_modes[] = { 87 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 88 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 89 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 90 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 91 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 92 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 93 "UK8_32", "UK9_32", "HYP_32", "UND_32", 94 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 95 }; 96 97 flags = condition_codes (regs); 98 99 printf("pc : [<%08lx>] lr : [<%08lx>]\n", 100 instruction_pointer(regs), regs->ARM_lr); 101 if (gd->flags & GD_FLG_RELOC) { 102 printf("reloc pc : [<%08lx>] lr : [<%08lx>]\n", 103 instruction_pointer(regs) - gd->reloc_off, 104 regs->ARM_lr - gd->reloc_off); 105 } 106 printf("sp : %08lx ip : %08lx fp : %08lx\n", 107 regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 108 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 109 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 110 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 111 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 112 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 113 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 114 printf ("Flags: %c%c%c%c", 115 flags & CC_N_BIT ? 'N' : 'n', 116 flags & CC_Z_BIT ? 'Z' : 'z', 117 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 118 printf (" IRQs %s FIQs %s Mode %s%s\n", 119 interrupts_enabled (regs) ? "on" : "off", 120 fast_interrupts_enabled (regs) ? "on" : "off", 121 processor_modes[processor_mode (regs)], 122 thumb_mode (regs) ? " (T)" : ""); 123 dump_instr(regs); 124 } 125 126 /* fixup PC to point to the instruction leading to the exception */ 127 static inline void fixup_pc(struct pt_regs *regs, int offset) 128 { 129 uint32_t pc = instruction_pointer(regs) + offset; 130 regs->ARM_pc = pc | (regs->ARM_pc & PCMASK); 131 } 132 133 void do_undefined_instruction (struct pt_regs *pt_regs) 134 { 135 efi_restore_gd(); 136 printf ("undefined instruction\n"); 137 fixup_pc(pt_regs, -4); 138 show_regs (pt_regs); 139 show_efi_loaded_images(pt_regs); 140 bad_mode (); 141 } 142 143 void do_software_interrupt (struct pt_regs *pt_regs) 144 { 145 efi_restore_gd(); 146 printf ("software interrupt\n"); 147 fixup_pc(pt_regs, -4); 148 show_regs (pt_regs); 149 show_efi_loaded_images(pt_regs); 150 bad_mode (); 151 } 152 153 void do_prefetch_abort (struct pt_regs *pt_regs) 154 { 155 efi_restore_gd(); 156 printf ("prefetch abort\n"); 157 fixup_pc(pt_regs, -8); 158 show_regs (pt_regs); 159 show_efi_loaded_images(pt_regs); 160 bad_mode (); 161 } 162 163 void do_data_abort (struct pt_regs *pt_regs) 164 { 165 efi_restore_gd(); 166 printf ("data abort\n"); 167 fixup_pc(pt_regs, -8); 168 show_regs (pt_regs); 169 show_efi_loaded_images(pt_regs); 170 bad_mode (); 171 } 172 173 void do_not_used (struct pt_regs *pt_regs) 174 { 175 efi_restore_gd(); 176 printf ("not used\n"); 177 fixup_pc(pt_regs, -8); 178 show_regs (pt_regs); 179 show_efi_loaded_images(pt_regs); 180 bad_mode (); 181 } 182 183 void do_fiq (struct pt_regs *pt_regs) 184 { 185 efi_restore_gd(); 186 printf ("fast interrupt request\n"); 187 fixup_pc(pt_regs, -8); 188 show_regs (pt_regs); 189 show_efi_loaded_images(pt_regs); 190 bad_mode (); 191 } 192 193 void do_irq (struct pt_regs *pt_regs) 194 { 195 efi_restore_gd(); 196 printf ("interrupt request\n"); 197 fixup_pc(pt_regs, -8); 198 show_regs (pt_regs); 199 show_efi_loaded_images(pt_regs); 200 bad_mode (); 201 } 202
