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 26 DECLARE_GLOBAL_DATA_PTR; 27 28 #ifdef CONFIG_USE_IRQ 29 int interrupt_init (void) 30 { 31 unsigned long cpsr; 32 33 /* 34 * setup up stacks if necessary 35 */ 36 IRQ_STACK_START = gd->irq_sp - 4; 37 IRQ_STACK_START_IN = gd->irq_sp + 8; 38 FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ; 39 40 41 __asm__ __volatile__("mrs %0, cpsr\n" 42 : "=r" (cpsr) 43 : 44 : "memory"); 45 46 __asm__ __volatile__("msr cpsr_c, %0\n" 47 "mov sp, %1\n" 48 : 49 : "r" (IRQ_MODE | I_BIT | F_BIT | (cpsr & ~FIQ_MODE)), 50 "r" (IRQ_STACK_START) 51 : "memory"); 52 53 __asm__ __volatile__("msr cpsr_c, %0\n" 54 "mov sp, %1\n" 55 : 56 : "r" (FIQ_MODE | I_BIT | F_BIT | (cpsr & ~IRQ_MODE)), 57 "r" (FIQ_STACK_START) 58 : "memory"); 59 60 __asm__ __volatile__("msr cpsr_c, %0" 61 : 62 : "r" (cpsr) 63 : "memory"); 64 65 return arch_interrupt_init(); 66 } 67 68 /* enable IRQ interrupts */ 69 void enable_interrupts (void) 70 { 71 unsigned long temp; 72 __asm__ __volatile__("mrs %0, cpsr\n" 73 "bic %0, %0, #0x80\n" 74 "msr cpsr_c, %0" 75 : "=r" (temp) 76 : 77 : "memory"); 78 } 79 80 81 /* 82 * disable IRQ/FIQ interrupts 83 * returns true if interrupts had been enabled before we disabled them 84 */ 85 int disable_interrupts (void) 86 { 87 unsigned long old,temp; 88 __asm__ __volatile__("mrs %0, cpsr\n" 89 "orr %1, %0, #0xc0\n" 90 "msr cpsr_c, %1" 91 : "=r" (old), "=r" (temp) 92 : 93 : "memory"); 94 return (old & 0x80) == 0; 95 } 96 #else 97 int interrupt_init (void) 98 { 99 /* 100 * setup up stacks if necessary 101 */ 102 IRQ_STACK_START_IN = gd->irq_sp + 8; 103 104 return 0; 105 } 106 107 void enable_interrupts (void) 108 { 109 return; 110 } 111 int disable_interrupts (void) 112 { 113 return 0; 114 } 115 #endif 116 117 118 void bad_mode (void) 119 { 120 panic ("Resetting CPU ...\n"); 121 reset_cpu (0); 122 } 123 124 void show_regs (struct pt_regs *regs) 125 { 126 unsigned long __maybe_unused flags; 127 const char __maybe_unused *processor_modes[] = { 128 "USER_26", "FIQ_26", "IRQ_26", "SVC_26", 129 "UK4_26", "UK5_26", "UK6_26", "UK7_26", 130 "UK8_26", "UK9_26", "UK10_26", "UK11_26", 131 "UK12_26", "UK13_26", "UK14_26", "UK15_26", 132 "USER_32", "FIQ_32", "IRQ_32", "SVC_32", 133 "UK4_32", "UK5_32", "UK6_32", "ABT_32", 134 "UK8_32", "UK9_32", "HYP_32", "UND_32", 135 "UK12_32", "UK13_32", "UK14_32", "SYS_32", 136 }; 137 138 flags = condition_codes (regs); 139 140 printf("pc : [<%08lx>] lr : [<%08lx>]\n", 141 instruction_pointer(regs), regs->ARM_lr); 142 if (gd->flags & GD_FLG_RELOC) { 143 printf("reloc pc : [<%08lx>] lr : [<%08lx>]\n", 144 instruction_pointer(regs) - gd->reloc_off, 145 regs->ARM_lr - gd->reloc_off); 146 } 147 printf("sp : %08lx ip : %08lx fp : %08lx\n", 148 regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); 149 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", 150 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); 151 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", 152 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); 153 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", 154 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); 155 printf ("Flags: %c%c%c%c", 156 flags & CC_N_BIT ? 'N' : 'n', 157 flags & CC_Z_BIT ? 'Z' : 'z', 158 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); 159 printf (" IRQs %s FIQs %s Mode %s%s\n", 160 interrupts_enabled (regs) ? "on" : "off", 161 fast_interrupts_enabled (regs) ? "on" : "off", 162 processor_modes[processor_mode (regs)], 163 thumb_mode (regs) ? " (T)" : ""); 164 } 165 166 void do_undefined_instruction (struct pt_regs *pt_regs) 167 { 168 printf ("undefined instruction\n"); 169 show_regs (pt_regs); 170 bad_mode (); 171 } 172 173 void do_software_interrupt (struct pt_regs *pt_regs) 174 { 175 printf ("software interrupt\n"); 176 show_regs (pt_regs); 177 bad_mode (); 178 } 179 180 void do_prefetch_abort (struct pt_regs *pt_regs) 181 { 182 printf ("prefetch abort\n"); 183 show_regs (pt_regs); 184 bad_mode (); 185 } 186 187 void do_data_abort (struct pt_regs *pt_regs) 188 { 189 printf ("data abort\n"); 190 show_regs (pt_regs); 191 bad_mode (); 192 } 193 194 void do_not_used (struct pt_regs *pt_regs) 195 { 196 printf ("not used\n"); 197 show_regs (pt_regs); 198 bad_mode (); 199 } 200 201 void do_fiq (struct pt_regs *pt_regs) 202 { 203 printf ("fast interrupt request\n"); 204 show_regs (pt_regs); 205 bad_mode (); 206 } 207 208 #ifndef CONFIG_USE_IRQ 209 void do_irq (struct pt_regs *pt_regs) 210 { 211 printf ("interrupt request\n"); 212 show_regs (pt_regs); 213 bad_mode (); 214 } 215 #endif 216