3 * Lineo, Inc. <www.lineo.com>
4 * Bernhard Kuhn <bkuhn@lineo.com>
7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8 * Marius Groeger <mgroeger@sysgo.de>
11 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
12 * Alex Zuepke <azu@sysgo.de>
14 * See file CREDITS for list of people who contributed to this
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
35 #include <asm/proc-armv/ptrace.h>
37 extern void reset_cpu(ulong addr
);
39 /* we always count down the max. */
40 #define TIMER_LOAD_VAL 0xffff
42 /* macro to read the 16 bit timer */
43 #define READ_TIMER (tmr->TC_CV)
48 void enable_interrupts (void)
52 int disable_interrupts (void)
60 panic("Resetting CPU ...\n");
64 void show_regs(struct pt_regs
* regs
)
67 const char *processor_modes
[]=
68 { "USER_26", "FIQ_26" , "IRQ_26" , "SVC_26" , "UK4_26" , "UK5_26" , "UK6_26" , "UK7_26" ,
69 "UK8_26" , "UK9_26" , "UK10_26", "UK11_26", "UK12_26", "UK13_26", "UK14_26", "UK15_26",
70 "USER_32", "FIQ_32" , "IRQ_32" , "SVC_32" , "UK4_32" , "UK5_32" , "UK6_32" , "ABT_32" ,
71 "UK8_32" , "UK9_32" , "UK10_32", "UND_32" , "UK12_32", "UK13_32", "UK14_32", "SYS_32"
74 flags
= condition_codes(regs
);
76 printf("pc : [<%08lx>] lr : [<%08lx>]\n"
77 "sp : %08lx ip : %08lx fp : %08lx\n",
78 instruction_pointer(regs
),
79 regs
->ARM_lr
, regs
->ARM_sp
,
80 regs
->ARM_ip
, regs
->ARM_fp
);
81 printf("r10: %08lx r9 : %08lx r8 : %08lx\n",
82 regs
->ARM_r10
, regs
->ARM_r9
,
84 printf("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
85 regs
->ARM_r7
, regs
->ARM_r6
,
86 regs
->ARM_r5
, regs
->ARM_r4
);
87 printf("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
88 regs
->ARM_r3
, regs
->ARM_r2
,
89 regs
->ARM_r1
, regs
->ARM_r0
);
90 printf("Flags: %c%c%c%c",
91 flags
& CC_N_BIT
? 'N' : 'n',
92 flags
& CC_Z_BIT
? 'Z' : 'z',
93 flags
& CC_C_BIT
? 'C' : 'c',
94 flags
& CC_V_BIT
? 'V' : 'v');
95 printf(" IRQs %s FIQs %s Mode %s%s\n",
96 interrupts_enabled(regs
) ? "on" : "off",
97 fast_interrupts_enabled(regs
) ? "on" : "off",
98 processor_modes
[processor_mode(regs
)],
99 thumb_mode(regs
) ? " (T)" : "");
102 void do_undefined_instruction(struct pt_regs
*pt_regs
)
104 printf("undefined instruction\n");
109 void do_software_interrupt(struct pt_regs
*pt_regs
)
111 printf("software interrupt\n");
116 void do_prefetch_abort(struct pt_regs
*pt_regs
)
118 printf("prefetch abort\n");
123 void do_data_abort(struct pt_regs
*pt_regs
)
125 printf("data abort\n");
130 void do_not_used(struct pt_regs
*pt_regs
)
132 printf("not used\n");
137 void do_fiq(struct pt_regs
*pt_regs
)
139 printf("fast interrupt request\n");
144 void do_irq(struct pt_regs
*pt_regs
)
146 printf("interrupt request\n");
151 static ulong timestamp
;
152 static ulong lastinc
;
154 int interrupt_init (void)
157 tmr
= AT91C_BASE_TC0
;
159 /* enables TC1.0 clock */
160 *AT91C_PMC_PCER
= 1 << AT91C_ID_TC0
; /* enable clock */
163 *AT91C_TCB0_BMR
= AT91C_TCB_TC0XC0S_NONE
| AT91C_TCB_TC1XC1S_NONE
| AT91C_TCB_TC2XC2S_NONE
;
164 tmr
->TC_CCR
= AT91C_TC_CLKDIS
;
165 tmr
->TC_CMR
= AT91C_TC_TIMER_DIV1_CLOCK
; /* set to MCLK/2 */
168 tmr
->TC_RC
= TIMER_LOAD_VAL
;
169 lastinc
= TIMER_LOAD_VAL
;
170 tmr
->TC_CCR
= AT91C_TC_SWTRG
| AT91C_TC_CLKEN
;
176 * timer without interrupts
179 void reset_timer(void)
181 reset_timer_masked();
184 ulong
get_timer (ulong base
)
186 return get_timer_masked() - base
;
189 void set_timer (ulong t
)
194 void udelay(unsigned long usec
)
199 void reset_timer_masked(void)
202 lastinc
= READ_TIMER
;
206 ulong
get_timer_masked(void)
208 ulong now
= READ_TIMER
;
212 timestamp
+= now
- lastinc
;
214 /* we have an overflow ... */
215 timestamp
+= now
+ TIMER_LOAD_VAL
- lastinc
;
222 void udelay_masked(unsigned long usec
)
230 reset_timer_masked();
232 while(get_timer_masked() < tmo
);