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Wolfgang Denkadf20a12005-09-25 01:48:28 +02001/*
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
Detlev Zundelf1b3f2b2009-05-13 10:54:10 +020014 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
Wolfgang Denkadf20a12005-09-25 01:48:28 +020015 *
16 * (C) Copyright 2004
17 * Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
18 *
Wolfgang Denkbd8ec7e2013-10-07 13:07:26 +020019 * SPDX-License-Identifier: GPL-2.0+
Wolfgang Denkadf20a12005-09-25 01:48:28 +020020 */
21
22#include <common.h>
23#include <asm/proc-armv/ptrace.h>
24
Jean-Christophe PLAGNIOL-VILLARDda7b3db2009-05-09 13:21:18 +020025DECLARE_GLOBAL_DATA_PTR;
26
Heiko Schocheraeb29912010-09-17 13:10:39 +020027#ifdef CONFIG_USE_IRQ
Jean-Christophe PLAGNIOL-VILLARDda7b3db2009-05-09 13:21:18 +020028int interrupt_init (void)
29{
30 /*
31 * setup up stacks if necessary
32 */
Heiko Schocheraeb29912010-09-17 13:10:39 +020033 IRQ_STACK_START = gd->irq_sp - 4;
34 IRQ_STACK_START_IN = gd->irq_sp + 8;
Jean-Christophe PLAGNIOL-VILLARDda7b3db2009-05-09 13:21:18 +020035 FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
36
37 return arch_interrupt_init();
38}
39
Wolfgang Denkadf20a12005-09-25 01:48:28 +020040/* enable IRQ interrupts */
41void enable_interrupts (void)
42{
43 unsigned long temp;
44 __asm__ __volatile__("mrs %0, cpsr\n"
45 "bic %0, %0, #0x80\n"
46 "msr cpsr_c, %0"
47 : "=r" (temp)
48 :
49 : "memory");
50}
51
52
53/*
54 * disable IRQ/FIQ interrupts
55 * returns true if interrupts had been enabled before we disabled them
56 */
57int disable_interrupts (void)
58{
59 unsigned long old,temp;
60 __asm__ __volatile__("mrs %0, cpsr\n"
61 "orr %1, %0, #0xc0\n"
62 "msr cpsr_c, %1"
63 : "=r" (old), "=r" (temp)
64 :
65 : "memory");
66 return (old & 0x80) == 0;
67}
68#else
Heiko Schocheraeb29912010-09-17 13:10:39 +020069int interrupt_init (void)
70{
71 /*
72 * setup up stacks if necessary
73 */
74 IRQ_STACK_START_IN = gd->irq_sp + 8;
75
76 return 0;
77}
Heiko Schocheraeb29912010-09-17 13:10:39 +020078
Wolfgang Denkadf20a12005-09-25 01:48:28 +020079void enable_interrupts (void)
80{
81 return;
82}
83int disable_interrupts (void)
84{
85 return 0;
86}
87#endif
88
89
90void bad_mode (void)
91{
92 panic ("Resetting CPU ...\n");
93 reset_cpu (0);
94}
95
96void show_regs (struct pt_regs *regs)
97{
98 unsigned long flags;
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",
108 };
109
110 flags = condition_codes (regs);
111
Andreas Engel2d4b2532008-01-14 09:06:52 +0000112 printf ("pc : [<%08lx>] lr : [<%08lx>]\n"
113 "sp : %08lx ip : %08lx fp : %08lx\n",
Wolfgang Denkadf20a12005-09-25 01:48:28 +0200114 instruction_pointer (regs),
115 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
Andreas Engel2d4b2532008-01-14 09:06:52 +0000116 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n",
Wolfgang Denkadf20a12005-09-25 01:48:28 +0200117 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
Andreas Engel2d4b2532008-01-14 09:06:52 +0000118 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
Wolfgang Denkadf20a12005-09-25 01:48:28 +0200119 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
Andreas Engel2d4b2532008-01-14 09:06:52 +0000120 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
Wolfgang Denkadf20a12005-09-25 01:48:28 +0200121 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
122 printf ("Flags: %c%c%c%c",
123 flags & CC_N_BIT ? 'N' : 'n',
124 flags & CC_Z_BIT ? 'Z' : 'z',
125 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
126 printf (" IRQs %s FIQs %s Mode %s%s\n",
127 interrupts_enabled (regs) ? "on" : "off",
128 fast_interrupts_enabled (regs) ? "on" : "off",
129 processor_modes[processor_mode (regs)],
130 thumb_mode (regs) ? " (T)" : "");
131}
132
133void do_undefined_instruction (struct pt_regs *pt_regs)
134{
135 printf ("undefined instruction\n");
136 show_regs (pt_regs);
137 bad_mode ();
138}
139
140void do_software_interrupt (struct pt_regs *pt_regs)
141{
142 printf ("software interrupt\n");
143 show_regs (pt_regs);
144 bad_mode ();
145}
146
147void do_prefetch_abort (struct pt_regs *pt_regs)
148{
149 printf ("prefetch abort\n");
150 show_regs (pt_regs);
151 bad_mode ();
152}
153
154void do_data_abort (struct pt_regs *pt_regs)
155{
Albert ARIBAUDd6d4ec82012-10-09 09:28:15 +0000156 printf ("data abort\n\n MAYBE you should read doc/README.arm-unaligned-accesses\n\n");
Wolfgang Denkadf20a12005-09-25 01:48:28 +0200157 show_regs (pt_regs);
158 bad_mode ();
159}
160
161void do_not_used (struct pt_regs *pt_regs)
162{
163 printf ("not used\n");
164 show_regs (pt_regs);
165 bad_mode ();
166}
167
168void do_fiq (struct pt_regs *pt_regs)
169{
170 printf ("fast interrupt request\n");
171 show_regs (pt_regs);
172 bad_mode ();
173}
174
Andreas Engel2d4b2532008-01-14 09:06:52 +0000175#ifndef CONFIG_USE_IRQ
Wolfgang Denkadf20a12005-09-25 01:48:28 +0200176void do_irq (struct pt_regs *pt_regs)
177{
178 printf ("interrupt request\n");
179 show_regs (pt_regs);
180 bad_mode ();
181}
Andreas Engel2d4b2532008-01-14 09:06:52 +0000182#endif