3 * Texas Instruments <www.ti.com>
6 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Marius Groeger <mgroeger@sysgo.de>
10 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
11 * Alex Zuepke <azu@sysgo.de>
13 * (C) Copyright 2002-2004
14 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
17 * Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
19 * SPDX-License-Identifier: GPL-2.0+
23 #include <asm/proc-armv/ptrace.h>
24 #include <asm/u-boot-arm.h>
25 #include <efi_loader.h>
27 DECLARE_GLOBAL_DATA_PTR;
30 int interrupt_init (void)
35 * setup up stacks if necessary
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;
42 __asm__ __volatile__("mrs %0, cpsr\n"
47 __asm__ __volatile__("msr cpsr_c, %0\n"
50 : "r" (IRQ_MODE | I_BIT | F_BIT | (cpsr & ~FIQ_MODE)),
54 __asm__ __volatile__("msr cpsr_c, %0\n"
57 : "r" (FIQ_MODE | I_BIT | F_BIT | (cpsr & ~IRQ_MODE)),
61 __asm__ __volatile__("msr cpsr_c, %0"
66 return arch_interrupt_init();
69 /* enable IRQ interrupts */
70 void enable_interrupts (void)
73 __asm__ __volatile__("mrs %0, cpsr\n"
83 * disable IRQ/FIQ interrupts
84 * returns true if interrupts had been enabled before we disabled them
86 int disable_interrupts (void)
88 unsigned long old,temp;
89 __asm__ __volatile__("mrs %0, cpsr\n"
92 : "=r" (old), "=r" (temp)
95 return (old & 0x80) == 0;
98 int interrupt_init (void)
101 * setup up stacks if necessary
103 IRQ_STACK_START_IN = gd->irq_sp + 8;
108 void enable_interrupts (void)
112 int disable_interrupts (void)
121 panic ("Resetting CPU ...\n");
125 void show_regs (struct pt_regs *regs)
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",
139 flags = condition_codes (regs);
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);
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)" : "");
167 void do_undefined_instruction (struct pt_regs *pt_regs)
170 printf ("undefined instruction\n");
175 void do_software_interrupt (struct pt_regs *pt_regs)
178 printf ("software interrupt\n");
183 void do_prefetch_abort (struct pt_regs *pt_regs)
186 printf ("prefetch abort\n");
191 void do_data_abort (struct pt_regs *pt_regs)
194 printf ("data abort\n");
199 void do_not_used (struct pt_regs *pt_regs)
202 printf ("not used\n");
207 void do_fiq (struct pt_regs *pt_regs)
210 printf ("fast interrupt request\n");
215 #ifndef CONFIG_USE_IRQ
216 void do_irq (struct pt_regs *pt_regs)
219 printf ("interrupt request\n");