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wdenkc6097192002-11-03 00:24:07 +00001/*
2 * (C) Copyright 2002
3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
5 *
6 * (C) Copyright 2002
7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8 * Alex Zuepke <azu@sysgo.de>
9 *
10 * (C) Copyright 2002
11 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
12 *
13 * See file CREDITS for list of people who contributed to this
14 * project.
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 * MA 02111-1307 USA
30 */
31
32#include <common.h>
wdenk281e00a2004-08-01 22:48:16 +000033#include <arm920t.h>
wdenkc6097192002-11-03 00:24:07 +000034#include <asm/proc-armv/ptrace.h>
35
wdenkc6097192002-11-03 00:24:07 +000036#ifdef CONFIG_USE_IRQ
37/* enable IRQ interrupts */
38void enable_interrupts (void)
39{
40 unsigned long temp;
41 __asm__ __volatile__("mrs %0, cpsr\n"
42 "bic %0, %0, #0x80\n"
43 "msr cpsr_c, %0"
44 : "=r" (temp)
45 :
46 : "memory");
47}
48
49
50/*
51 * disable IRQ/FIQ interrupts
52 * returns true if interrupts had been enabled before we disabled them
53 */
54int disable_interrupts (void)
55{
56 unsigned long old,temp;
57 __asm__ __volatile__("mrs %0, cpsr\n"
58 "orr %1, %0, #0xc0\n"
59 "msr cpsr_c, %1"
60 : "=r" (old), "=r" (temp)
61 :
62 : "memory");
63 return (old & 0x80) == 0;
64}
65#else
66void enable_interrupts (void)
67{
68 return;
69}
70int disable_interrupts (void)
71{
72 return 0;
73}
74#endif
75
76
wdenkc6097192002-11-03 00:24:07 +000077void bad_mode (void)
78{
79 panic ("Resetting CPU ...\n");
80 reset_cpu (0);
81}
82
83void show_regs (struct pt_regs *regs)
84{
85 unsigned long flags;
86 const char *processor_modes[] = {
87 "USER_26", "FIQ_26", "IRQ_26", "SVC_26",
88 "UK4_26", "UK5_26", "UK6_26", "UK7_26",
89 "UK8_26", "UK9_26", "UK10_26", "UK11_26",
90 "UK12_26", "UK13_26", "UK14_26", "UK15_26",
91 "USER_32", "FIQ_32", "IRQ_32", "SVC_32",
92 "UK4_32", "UK5_32", "UK6_32", "ABT_32",
93 "UK8_32", "UK9_32", "UK10_32", "UND_32",
94 "UK12_32", "UK13_32", "UK14_32", "SYS_32",
95 };
96
97 flags = condition_codes (regs);
98
99 printf ("pc : [<%08lx>] lr : [<%08lx>]\n"
100 "sp : %08lx ip : %08lx fp : %08lx\n",
101 instruction_pointer (regs),
102 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
103 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n",
104 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
105 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
106 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
107 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
108 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
109 printf ("Flags: %c%c%c%c",
110 flags & CC_N_BIT ? 'N' : 'n',
111 flags & CC_Z_BIT ? 'Z' : 'z',
112 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
113 printf (" IRQs %s FIQs %s Mode %s%s\n",
114 interrupts_enabled (regs) ? "on" : "off",
115 fast_interrupts_enabled (regs) ? "on" : "off",
116 processor_modes[processor_mode (regs)],
117 thumb_mode (regs) ? " (T)" : "");
118}
119
120void do_undefined_instruction (struct pt_regs *pt_regs)
121{
122 printf ("undefined instruction\n");
123 show_regs (pt_regs);
124 bad_mode ();
125}
126
127void do_software_interrupt (struct pt_regs *pt_regs)
128{
129 printf ("software interrupt\n");
130 show_regs (pt_regs);
131 bad_mode ();
132}
133
134void do_prefetch_abort (struct pt_regs *pt_regs)
135{
136 printf ("prefetch abort\n");
137 show_regs (pt_regs);
138 bad_mode ();
139}
140
141void do_data_abort (struct pt_regs *pt_regs)
142{
143 printf ("data abort\n");
144 show_regs (pt_regs);
145 bad_mode ();
146}
147
148void do_not_used (struct pt_regs *pt_regs)
149{
150 printf ("not used\n");
151 show_regs (pt_regs);
152 bad_mode ();
153}
154
155void do_fiq (struct pt_regs *pt_regs)
156{
157 printf ("fast interrupt request\n");
158 show_regs (pt_regs);
159 bad_mode ();
160}
161
162void do_irq (struct pt_regs *pt_regs)
163{
Wolfgang Denk74f43042005-09-25 01:48:28 +0200164#if defined (CONFIG_USE_IRQ) && defined (CONFIG_ARCH_INTEGRATOR)
165 /* ASSUMED to be a timer interrupt */
166 /* Just clear it - count handled in */
167 /* integratorap.c */
Wolfgang Denkfe7eb5d2005-09-25 02:00:47 +0200168 *(volatile ulong *)(CFG_TIMERBASE + 0x0C) = 0;
Wolfgang Denk74f43042005-09-25 01:48:28 +0200169#else
wdenkc6097192002-11-03 00:24:07 +0000170 printf ("interrupt request\n");
171 show_regs (pt_regs);
172 bad_mode ();
Wolfgang Denk74f43042005-09-25 01:48:28 +0200173#endif
wdenkc6097192002-11-03 00:24:07 +0000174}