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15809248 WD |
1 | /* |
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 | ||
34 | extern void reset_cpu (ulong addr); | |
35 | ||
36 | #ifdef CONFIG_USE_IRQ | |
37 | /* enable IRQ/FIQ interrupts */ | |
38 | void 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 | */ | |
54 | int 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 | |
67 | void enable_interrupts (void) | |
68 | { | |
69 | return; | |
70 | } | |
71 | int disable_interrupts (void) | |
72 | { | |
73 | return 0; | |
74 | } | |
75 | #endif | |
76 | ||
77 | ||
15809248 WD |
78 | void bad_mode (void) |
79 | { | |
80 | panic ("Resetting CPU ...\n"); | |
81 | reset_cpu (0); | |
82 | } | |
83 | ||
84 | void 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 | ||
121 | void do_undefined_instruction (struct pt_regs *pt_regs) | |
122 | { | |
123 | printf ("undefined instruction\n"); | |
124 | show_regs (pt_regs); | |
125 | bad_mode (); | |
126 | } | |
127 | ||
128 | void do_software_interrupt (struct pt_regs *pt_regs) | |
129 | { | |
130 | printf ("software interrupt\n"); | |
131 | show_regs (pt_regs); | |
132 | bad_mode (); | |
133 | } | |
134 | ||
135 | void do_prefetch_abort (struct pt_regs *pt_regs) | |
136 | { | |
137 | printf ("prefetch abort\n"); | |
138 | show_regs (pt_regs); | |
139 | bad_mode (); | |
140 | } | |
141 | ||
142 | void do_data_abort (struct pt_regs *pt_regs) | |
143 | { | |
144 | printf ("data abort\n"); | |
145 | show_regs (pt_regs); | |
146 | bad_mode (); | |
147 | } | |
148 | ||
149 | void do_not_used (struct pt_regs *pt_regs) | |
150 | { | |
151 | printf ("not used\n"); | |
152 | show_regs (pt_regs); | |
153 | bad_mode (); | |
154 | } | |
155 | ||
156 | void do_fiq (struct pt_regs *pt_regs) | |
157 | { | |
158 | printf ("fast interrupt request\n"); | |
159 | show_regs (pt_regs); | |
160 | bad_mode (); | |
161 | } | |
162 | ||
163 | void do_irq (struct pt_regs *pt_regs) | |
164 | { | |
165 | printf ("interrupt request\n"); | |
166 | show_regs (pt_regs); | |
167 | bad_mode (); | |
168 | } | |
169 | ||
170 | ||
171 | int interrupt_init (void) | |
172 | { | |
173 | /* nothing happens here - we don't setup any IRQs */ | |
174 | return (0); | |
175 | } | |
176 | ||
177 | void reset_timer (void) | |
178 | { | |
179 | reset_timer_masked (); | |
180 | } | |
181 | ||
182 | ulong get_timer (ulong base) | |
183 | { | |
184 | return get_timer_masked (); | |
185 | } | |
186 | ||
187 | void set_timer (ulong t) | |
188 | { | |
189 | /* nop */ | |
190 | } | |
191 | ||
192 | void udelay (unsigned long usec) | |
193 | { | |
194 | udelay_masked (usec); | |
195 | } | |
196 | ||
197 | ||
198 | void reset_timer_masked (void) | |
199 | { | |
200 | OSCR = 0; | |
201 | } | |
202 | ||
203 | ulong get_timer_masked (void) | |
204 | { | |
205 | return OSCR; | |
206 | } | |
207 | ||
208 | void 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 | } |