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 #ifdef CONFIG_USE_IRQ 30 int interrupt_init (void) 31 { 32 unsigned long cpsr; 33 34 /* 35 * setup up stacks if necessary 36 */ 37 IRQ_STACK_START = gd->irq_sp - 4; 38 IRQ_STACK_START_IN = gd->irq_sp + 8; 39 FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ; 40 41 42 __asm__ __volatile__("mrs %0, cpsr\n" 43 : "=r" (cpsr) 44 : 45 : "memory"); 46 47 __asm__ __volatile__("msr cpsr_c, %0\n" 48 "mov sp, %1\n" 49 : 50 : "r" (IRQ_MODE | I_BIT | F_BIT | (cpsr & ~FIQ_MODE)), 51 "r" (IRQ_STACK_START) 52 : "memory"); 53 54 __asm__ __volatile__("msr cpsr_c, %0\n" 55 "mov sp, %1\n" 56 : 57 : "r" (FIQ_MODE | I_BIT | F_BIT | (cpsr & ~IRQ_MODE)), 58 "r" (FIQ_STACK_START) 59 : "memory"); 60 61 __asm__ __volatile__("msr cpsr_c, %0" 62 : 63 : "r" (cpsr) 64 : "memory"); 65 66 return arch_interrupt_init(); 67 } 68 69 /* enable IRQ interrupts */ 70 void enable_interrupts (void) 71 { 72 unsigned long temp; 73 __asm__ __volatile__("mrs %0, cpsr\n" 74 "bic %0, %0, #0x80\n" 75 "msr cpsr_c, %0" 76 : "=r" (temp) 77 : 78 : "memory"); 79 } 80 81 82 /* 83 * disable IRQ/FIQ interrupts 84 * returns true if interrupts had been enabled before we disabled them 85 */ 86 int disable_interrupts (void) 87 { 88 unsigned long old,temp; 89 __asm__ __volatile__("mrs %0, cpsr\n" 90 "orr %1, %0, #0xc0\n" 91 "msr cpsr_c, %1" 92 : "=r" (old), "=r" (temp) 93 : 94 : "memory"); 95 return (old & 0x80) == 0; 96 } 97 #else 98 int interrupt_init (void) 99 { 100 /* 101 * setup up stacks if necessary 102 */ 103 IRQ_STACK_START_IN = gd->irq_sp + 8; 104 105 return 0; 106 } 107 108 void enable_interrupts (void) 109 { 110 return; 111 } 112 int disable_interrupts (void) 113 { 114 return 0; 115 } 116 #endif 117 118 119 void bad_mode (void) 120 { 121 panic ("Resetting CPU ...\n"); 122 reset_cpu (0); 123 } 124 125 void show_regs (struct pt_regs *regs) 126 { 127 unsigned long __maybe_unused flags; 128 const char __maybe_unused *processor_modes[] = { 129 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 130 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 131 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 132 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 133 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 134 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 135 "UK8_32", "UK9_32", "HYP_32", "UND_32", 136 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 137 }; 138 139 flags = condition_codes (regs); 140 141 printf("pc : [<%08lx>] lr : [<%08lx>]\n", 142 instruction_pointer(regs), regs->ARM_lr); 143 if (gd->flags & GD_FLG_RELOC) { 144 printf("reloc pc : [<%08lx>] lr : [<%08lx>]\n", 145 instruction_pointer(regs) - gd->reloc_off, 146 regs->ARM_lr - gd->reloc_off); 147 } 148 printf("sp : %08lx ip : %08lx fp : %08lx\n", 149 regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 150 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 151 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 152 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 153 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 154 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 155 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 156 printf ("Flags: %c%c%c%c", 157 flags & CC_N_BIT ? 'N' : 'n', 158 flags & CC_Z_BIT ? 'Z' : 'z', 159 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 160 printf (" IRQs %s FIQs %s Mode %s%s\n", 161 interrupts_enabled (regs) ? "on" : "off", 162 fast_interrupts_enabled (regs) ? "on" : "off", 163 processor_modes[processor_mode (regs)], 164 thumb_mode (regs) ? " (T)" : ""); 165 } 166 167 void do_undefined_instruction (struct pt_regs *pt_regs) 168 { 169 efi_restore_gd(); 170 printf ("undefined instruction\n"); 171 show_regs (pt_regs); 172 bad_mode (); 173 } 174 175 void do_software_interrupt (struct pt_regs *pt_regs) 176 { 177 efi_restore_gd(); 178 printf ("software interrupt\n"); 179 show_regs (pt_regs); 180 bad_mode (); 181 } 182 183 void do_prefetch_abort (struct pt_regs *pt_regs) 184 { 185 efi_restore_gd(); 186 printf ("prefetch abort\n"); 187 show_regs (pt_regs); 188 bad_mode (); 189 } 190 191 void do_data_abort (struct pt_regs *pt_regs) 192 { 193 efi_restore_gd(); 194 printf ("data abort\n"); 195 show_regs (pt_regs); 196 bad_mode (); 197 } 198 199 void do_not_used (struct pt_regs *pt_regs) 200 { 201 efi_restore_gd(); 202 printf ("not used\n"); 203 show_regs (pt_regs); 204 bad_mode (); 205 } 206 207 void do_fiq (struct pt_regs *pt_regs) 208 { 209 efi_restore_gd(); 210 printf ("fast interrupt request\n"); 211 show_regs (pt_regs); 212 bad_mode (); 213 } 214 215 #ifndef CONFIG_USE_IRQ 216 void do_irq (struct pt_regs *pt_regs) 217 { 218 efi_restore_gd(); 219 printf ("interrupt request\n"); 220 show_regs (pt_regs); 221 bad_mode (); 222 } 223 #endif 224