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/ptrace.h>
25 DECLARE_GLOBAL_DATA_PTR;
28 int interrupt_init (void)
31 * setup up stacks if necessary
33 IRQ_STACK_START = gd->irq_sp - 4;
34 IRQ_STACK_START_IN = gd->irq_sp + 8;
35 FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
37 return arch_interrupt_init();
40 /* enable IRQ interrupts */
41 void enable_interrupts (void)
44 __asm__ __volatile__("mrs %0, cpsr\n"
54 * disable IRQ/FIQ interrupts
55 * returns true if interrupts had been enabled before we disabled them
57 int disable_interrupts (void)
59 unsigned long old,temp;
60 __asm__ __volatile__("mrs %0, cpsr\n"
63 : "=r" (old), "=r" (temp)
66 return (old & 0x80) == 0;
69 int interrupt_init (void)
72 * setup up stacks if necessary
74 IRQ_STACK_START_IN = gd->irq_sp + 8;
79 void enable_interrupts (void)
83 int disable_interrupts (void)
92 panic ("Resetting CPU ...\n");
96 void show_regs (struct pt_regs *regs)
99 const char *processor_modes[] = {
100 "USER_26", "FIQ_26", "IRQ_26", "SVC_26",
101 "UK4_26", "UK5_26", "UK6_26", "UK7_26",
102 "UK8_26", "UK9_26", "UK10_26", "UK11_26",
103 "UK12_26", "UK13_26", "UK14_26", "UK15_26",
104 "USER_32", "FIQ_32", "IRQ_32", "SVC_32",
105 "UK4_32", "UK5_32", "UK6_32", "ABT_32",
106 "UK8_32", "UK9_32", "UK10_32", "UND_32",
107 "UK12_32", "UK13_32", "UK14_32", "SYS_32",
110 flags = condition_codes(regs);
112 if (gd->flags & GD_FLG_RELOC)
113 printf ("pc : [<%08lx>] (pre-reloc: [<%08lx>]) lr : [<%08lx>]\n"
114 "sp : %08lx ip : %08lx fp : %08lx\n",
115 instruction_pointer(regs),
116 instruction_pointer(regs) - gd->reloc_off,
117 regs->ARM_lr, regs->ARM_sp,
118 regs->ARM_ip, regs->ARM_fp);
120 printf ("pc : [<%08lx>] lr : [<%08lx>]\n"
121 "sp : %08lx ip : %08lx fp : %08lx\n",
122 instruction_pointer(regs), regs->ARM_lr, regs->ARM_sp,
123 regs->ARM_ip, regs->ARM_fp);
124 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n",
125 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
126 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
127 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
128 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
129 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
130 printf ("Flags: %c%c%c%c",
131 flags & CC_N_BIT ? 'N' : 'n',
132 flags & CC_Z_BIT ? 'Z' : 'z',
133 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
134 printf (" IRQs %s FIQs %s Mode %s%s\n",
135 interrupts_enabled (regs) ? "on" : "off",
136 fast_interrupts_enabled (regs) ? "on" : "off",
137 processor_modes[processor_mode (regs)],
138 thumb_mode (regs) ? " (T)" : "");
141 /* fixup PC to point to instruction leading to exception */
142 static inline void fixup_pc(struct pt_regs *regs, int offset)
144 uint32_t pc = instruction_pointer(regs) + offset;
145 regs->ARM_pc = pc | (regs->ARM_pc & PCMASK);
148 void do_undefined_instruction (struct pt_regs *pt_regs)
150 printf ("undefined instruction\n");
151 fixup_pc(pt_regs, -4);
156 void do_software_interrupt (struct pt_regs *pt_regs)
158 printf ("software interrupt\n");
159 fixup_pc(pt_regs, -4);
164 void do_prefetch_abort (struct pt_regs *pt_regs)
166 printf ("prefetch abort\n");
167 fixup_pc(pt_regs, -8);
172 void do_data_abort (struct pt_regs *pt_regs)
176 /* Read Fault Status Register */
177 asm volatile ("mrc p15, 0, %0, c5, c0, 0" : "=r"(fsr));
179 printf ("data abort\n\n");
181 printf ("MAYBE you should read doc/README.arm-unaligned-accesses\n\n");
182 fixup_pc(pt_regs, -8);
187 void do_not_used (struct pt_regs *pt_regs)
189 printf ("not used\n");
190 fixup_pc(pt_regs, -8);
195 void do_fiq (struct pt_regs *pt_regs)
197 printf ("fast interrupt request\n");
198 fixup_pc(pt_regs, -8);
203 #ifndef CONFIG_USE_IRQ
204 void do_irq (struct pt_regs *pt_regs)
206 printf ("interrupt request\n");
207 fixup_pc(pt_regs, -8);