blob: be52849dbae7d4e9d022c735c12cfe4071691236 [file] [log] [blame]
wdenk15809242002-09-08 20:56:32 +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 * See file CREDITS for list of people who contributed to this
11 * project.
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 * MA 02111-1307 USA
27 */
28
29#include <common.h>
30#include <SA-1100.h>
31
32#include <asm/proc-armv/ptrace.h>
33
34extern void reset_cpu (ulong addr);
35
36#ifdef CONFIG_USE_IRQ
37/* enable IRQ/FIQ 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, #0x80\n"
59 "msr cpsr_c, %1"
60 : "=r" (old), "=r" (temp)
61 :
62 : "memory");
63
64 return (old & 0x80) == 0;
65}
66#else
67void enable_interrupts (void)
68{
69 return;
70}
71int disable_interrupts (void)
72{
73 return 0;
74}
75#endif
76
77
78
79void bad_mode (void)
80{
81 panic ("Resetting CPU ...\n");
82 reset_cpu (0);
83}
84
85void show_regs (struct pt_regs *regs)
86{
87 unsigned long flags;
88 const char *processor_modes[] = {
89 "USER_26", "FIQ_26", "IRQ_26", "SVC_26",
90 "UK4_26", "UK5_26", "UK6_26", "UK7_26",
91 "UK8_26", "UK9_26", "UK10_26", "UK11_26",
92 "UK12_26", "UK13_26", "UK14_26", "UK15_26",
93 "USER_32", "FIQ_32", "IRQ_32", "SVC_32",
94 "UK4_32", "UK5_32", "UK6_32", "ABT_32",
95 "UK8_32", "UK9_32", "UK10_32", "UND_32",
96 "UK12_32", "UK13_32", "UK14_32", "SYS_32"
97 };
98
99 flags = condition_codes (regs);
100
101 printf ("pc : [<%08lx>] lr : [<%08lx>]\n"
102 "sp : %08lx ip : %08lx fp : %08lx\n",
103 instruction_pointer (regs),
104 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
105 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n",
106 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
107 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
108 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
109 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
110 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
111 printf ("Flags: %c%c%c%c",
112 flags & CC_N_BIT ? 'N' : 'n',
113 flags & CC_Z_BIT ? 'Z' : 'z',
114 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
115 printf (" IRQs %s FIQs %s Mode %s%s\n",
116 interrupts_enabled (regs) ? "on" : "off",
117 fast_interrupts_enabled (regs) ? "on" : "off",
118 processor_modes[processor_mode (regs)],
119 thumb_mode (regs) ? " (T)" : "");
120}
121
122void do_undefined_instruction (struct pt_regs *pt_regs)
123{
124 printf ("undefined instruction\n");
125 show_regs (pt_regs);
126 bad_mode ();
127}
128
129void do_software_interrupt (struct pt_regs *pt_regs)
130{
131 printf ("software interrupt\n");
132 show_regs (pt_regs);
133 bad_mode ();
134}
135
136void do_prefetch_abort (struct pt_regs *pt_regs)
137{
138 printf ("prefetch abort\n");
139 show_regs (pt_regs);
140 bad_mode ();
141}
142
143void do_data_abort (struct pt_regs *pt_regs)
144{
145 printf ("data abort\n");
146 show_regs (pt_regs);
147 bad_mode ();
148}
149
150void do_not_used (struct pt_regs *pt_regs)
151{
152 printf ("not used\n");
153 show_regs (pt_regs);
154 bad_mode ();
155}
156
157void do_fiq (struct pt_regs *pt_regs)
158{
159 printf ("fast interrupt request\n");
160 show_regs (pt_regs);
161 bad_mode ();
162}
163
164void do_irq (struct pt_regs *pt_regs)
165{
166 printf ("interrupt request\n");
167 show_regs (pt_regs);
168 bad_mode ();
169}
170
171
172int interrupt_init (void)
173{
174 /* nothing happens here - we don't setup any IRQs */
175 return (0);
176}
177
178void reset_timer (void)
179{
180 reset_timer_masked ();
181}
182
183ulong get_timer (ulong base)
184{
185 return get_timer_masked ();
186}
187
188void set_timer (ulong t)
189{
190 /* nop */
191}
192
193void udelay (unsigned long usec)
194{
195 udelay_masked (usec);
196}
197
198
199void reset_timer_masked (void)
200{
201 OSCR = 0;
202}
203
204ulong get_timer_masked (void)
205{
206 return OSCR;
207}
208
209void udelay_masked (unsigned long usec)
210{
211 ulong tmo;
212
213 tmo = usec / 1000;
214 tmo *= CFG_HZ;
215 tmo /= 1000;
216
217 reset_timer_masked ();
218
219 while (tmo >= get_timer_masked ())
220 /*NOP*/;
221}