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Wolfgang Denk74f43042005-09-25 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
14 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
15 *
16 * (C) Copyright 2004
17 * Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
18 *
19 * See file CREDITS for list of people who contributed to this
20 * project.
21 *
22 * This program is free software; you can redistribute it and/or
23 * modify it under the terms of the GNU General Public License as
24 * published by the Free Software Foundation; either version 2 of
25 * the License, or (at your option) any later version.
26 *
27 * This program is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Andreas Engel6d0943a2008-01-14 09:06:52 +000029 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Wolfgang Denk74f43042005-09-25 01:48:28 +020030 * GNU General Public License for more details.
31 *
32 * You should have received a copy of the GNU General Public License
33 * along with this program; if not, write to the Free Software
34 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
35 * MA 02111-1307 USA
36 */
37
38#include <common.h>
39#include <asm/proc-armv/ptrace.h>
40
Wolfgang Denk74f43042005-09-25 01:48:28 +020041#ifdef CONFIG_USE_IRQ
42/* enable IRQ interrupts */
43void enable_interrupts (void)
44{
45 unsigned long temp;
46 __asm__ __volatile__("mrs %0, cpsr\n"
47 "bic %0, %0, #0x80\n"
48 "msr cpsr_c, %0"
49 : "=r" (temp)
50 :
51 : "memory");
52}
53
54
55/*
56 * disable IRQ/FIQ interrupts
57 * returns true if interrupts had been enabled before we disabled them
58 */
59int disable_interrupts (void)
60{
61 unsigned long old,temp;
62 __asm__ __volatile__("mrs %0, cpsr\n"
63 "orr %1, %0, #0xc0\n"
64 "msr cpsr_c, %1"
65 : "=r" (old), "=r" (temp)
66 :
67 : "memory");
68 return (old & 0x80) == 0;
69}
70#else
71void enable_interrupts (void)
72{
73 return;
74}
75int disable_interrupts (void)
76{
77 return 0;
78}
79#endif
80
81
82void bad_mode (void)
83{
84 panic ("Resetting CPU ...\n");
85 reset_cpu (0);
86}
87
88void show_regs (struct pt_regs *regs)
89{
90 unsigned long flags;
91 const char *processor_modes[] = {
92 "USER_26", "FIQ_26", "IRQ_26", "SVC_26",
93 "UK4_26", "UK5_26", "UK6_26", "UK7_26",
94 "UK8_26", "UK9_26", "UK10_26", "UK11_26",
95 "UK12_26", "UK13_26", "UK14_26", "UK15_26",
96 "USER_32", "FIQ_32", "IRQ_32", "SVC_32",
97 "UK4_32", "UK5_32", "UK6_32", "ABT_32",
98 "UK8_32", "UK9_32", "UK10_32", "UND_32",
99 "UK12_32", "UK13_32", "UK14_32", "SYS_32",
100 };
101
102 flags = condition_codes (regs);
103
Andreas Engel6d0943a2008-01-14 09:06:52 +0000104 printf ("pc : [<%08lx>] lr : [<%08lx>]\n"
105 "sp : %08lx ip : %08lx fp : %08lx\n",
Wolfgang Denk74f43042005-09-25 01:48:28 +0200106 instruction_pointer (regs),
107 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
Andreas Engel6d0943a2008-01-14 09:06:52 +0000108 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n",
Wolfgang Denk74f43042005-09-25 01:48:28 +0200109 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
Andreas Engel6d0943a2008-01-14 09:06:52 +0000110 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
Wolfgang Denk74f43042005-09-25 01:48:28 +0200111 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
Andreas Engel6d0943a2008-01-14 09:06:52 +0000112 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
Wolfgang Denk74f43042005-09-25 01:48:28 +0200113 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
114 printf ("Flags: %c%c%c%c",
115 flags & CC_N_BIT ? 'N' : 'n',
116 flags & CC_Z_BIT ? 'Z' : 'z',
117 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
118 printf (" IRQs %s FIQs %s Mode %s%s\n",
119 interrupts_enabled (regs) ? "on" : "off",
120 fast_interrupts_enabled (regs) ? "on" : "off",
121 processor_modes[processor_mode (regs)],
122 thumb_mode (regs) ? " (T)" : "");
123}
124
125void do_undefined_instruction (struct pt_regs *pt_regs)
126{
127 printf ("undefined instruction\n");
128 show_regs (pt_regs);
129 bad_mode ();
130}
131
132void do_software_interrupt (struct pt_regs *pt_regs)
133{
134 printf ("software interrupt\n");
135 show_regs (pt_regs);
136 bad_mode ();
137}
138
139void do_prefetch_abort (struct pt_regs *pt_regs)
140{
141 printf ("prefetch abort\n");
142 show_regs (pt_regs);
143 bad_mode ();
144}
145
146void do_data_abort (struct pt_regs *pt_regs)
147{
148 printf ("data abort\n");
149 show_regs (pt_regs);
150 bad_mode ();
151}
152
153void do_not_used (struct pt_regs *pt_regs)
154{
155 printf ("not used\n");
156 show_regs (pt_regs);
157 bad_mode ();
158}
159
160void do_fiq (struct pt_regs *pt_regs)
161{
162 printf ("fast interrupt request\n");
163 show_regs (pt_regs);
164 bad_mode ();
165}
166
Andreas Engel6d0943a2008-01-14 09:06:52 +0000167#ifndef CONFIG_USE_IRQ
Wolfgang Denk74f43042005-09-25 01:48:28 +0200168void do_irq (struct pt_regs *pt_regs)
169{
170 printf ("interrupt request\n");
171 show_regs (pt_regs);
172 bad_mode ();
173}
Andreas Engel6d0943a2008-01-14 09:06:52 +0000174#endif