blob: 75f939c2cf1d3671190ddfcffaf01bd5218cfddc [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
wdenk15809242002-09-08 20:56:32 +000078void bad_mode (void)
79{
80 panic ("Resetting CPU ...\n");
81 reset_cpu (0);
82}
83
84void show_regs (struct pt_regs *regs)
85{
86 unsigned long flags;
87 const char *processor_modes[] = {
88 "USER_26", "FIQ_26", "IRQ_26", "SVC_26",
89 "UK4_26", "UK5_26", "UK6_26", "UK7_26",
90 "UK8_26", "UK9_26", "UK10_26", "UK11_26",
91 "UK12_26", "UK13_26", "UK14_26", "UK15_26",
92 "USER_32", "FIQ_32", "IRQ_32", "SVC_32",
93 "UK4_32", "UK5_32", "UK6_32", "ABT_32",
94 "UK8_32", "UK9_32", "UK10_32", "UND_32",
95 "UK12_32", "UK13_32", "UK14_32", "SYS_32"
96 };
97
98 flags = condition_codes (regs);
99
100 printf ("pc : [<%08lx>] lr : [<%08lx>]\n"
101 "sp : %08lx ip : %08lx fp : %08lx\n",
102 instruction_pointer (regs),
103 regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
104 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n",
105 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
106 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
107 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
108 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
109 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
110 printf ("Flags: %c%c%c%c",
111 flags & CC_N_BIT ? 'N' : 'n',
112 flags & CC_Z_BIT ? 'Z' : 'z',
113 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
114 printf (" IRQs %s FIQs %s Mode %s%s\n",
115 interrupts_enabled (regs) ? "on" : "off",
116 fast_interrupts_enabled (regs) ? "on" : "off",
117 processor_modes[processor_mode (regs)],
118 thumb_mode (regs) ? " (T)" : "");
119}
120
121void do_undefined_instruction (struct pt_regs *pt_regs)
122{
123 printf ("undefined instruction\n");
124 show_regs (pt_regs);
125 bad_mode ();
126}
127
128void do_software_interrupt (struct pt_regs *pt_regs)
129{
130 printf ("software interrupt\n");
131 show_regs (pt_regs);
132 bad_mode ();
133}
134
135void do_prefetch_abort (struct pt_regs *pt_regs)
136{
137 printf ("prefetch abort\n");
138 show_regs (pt_regs);
139 bad_mode ();
140}
141
142void do_data_abort (struct pt_regs *pt_regs)
143{
144 printf ("data abort\n");
145 show_regs (pt_regs);
146 bad_mode ();
147}
148
149void do_not_used (struct pt_regs *pt_regs)
150{
151 printf ("not used\n");
152 show_regs (pt_regs);
153 bad_mode ();
154}
155
156void do_fiq (struct pt_regs *pt_regs)
157{
158 printf ("fast interrupt request\n");
159 show_regs (pt_regs);
160 bad_mode ();
161}
162
163void do_irq (struct pt_regs *pt_regs)
164{
165 printf ("interrupt request\n");
166 show_regs (pt_regs);
167 bad_mode ();
168}
169
170
171int interrupt_init (void)
172{
173 /* nothing happens here - we don't setup any IRQs */
174 return (0);
175}
176
177void reset_timer (void)
178{
179 reset_timer_masked ();
180}
181
182ulong get_timer (ulong base)
183{
184 return get_timer_masked ();
185}
186
187void set_timer (ulong t)
188{
189 /* nop */
190}
191
192void udelay (unsigned long usec)
193{
194 udelay_masked (usec);
195}
196
197
198void reset_timer_masked (void)
199{
200 OSCR = 0;
201}
202
203ulong get_timer_masked (void)
204{
205 return OSCR;
206}
207
208void udelay_masked (unsigned long usec)
209{
210 ulong tmo;
211
212 tmo = usec / 1000;
213 tmo *= CFG_HZ;
214 tmo /= 1000;
215
216 reset_timer_masked ();
217
218 while (tmo >= get_timer_masked ())
219 /*NOP*/;
220}