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/arch/hardware.h>
36 #include <asm/proc/ptrace.h>
38 extern void reset_cpu(ulong addr);
40 /* we always count down the max. */
41 #define TIMER_LOAD_VAL 0xffff
43 /* macro to read the 16 bit timer */
44 #define READ_TIMER (tmr->TC_CV)
49 void enable_interrupts (void)
53 int disable_interrupts (void)
61 panic("Resetting CPU ...\n");
65 void show_regs(struct pt_regs * regs)
68 const char *processor_modes[]=
69 { "USER_26", "FIQ_26" , "IRQ_26" , "SVC_26" , "UK4_26" , "UK5_26" , "UK6_26" , "UK7_26" ,
70 "UK8_26" , "UK9_26" , "UK10_26", "UK11_26", "UK12_26", "UK13_26", "UK14_26", "UK15_26",
71 "USER_32", "FIQ_32" , "IRQ_32" , "SVC_32" , "UK4_32" , "UK5_32" , "UK6_32" , "ABT_32" ,
72 "UK8_32" , "UK9_32" , "UK10_32", "UND_32" , "UK12_32", "UK13_32", "UK14_32", "SYS_32"
75 flags = condition_codes(regs);
77 printf("pc : [<%08lx>] lr : [<%08lx>]\n"
78 "sp : %08lx ip : %08lx fp : %08lx\n",
79 instruction_pointer(regs),
80 regs->ARM_lr, regs->ARM_sp,
81 regs->ARM_ip, regs->ARM_fp);
82 printf("r10: %08lx r9 : %08lx r8 : %08lx\n",
83 regs->ARM_r10, regs->ARM_r9,
85 printf("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
86 regs->ARM_r7, regs->ARM_r6,
87 regs->ARM_r5, regs->ARM_r4);
88 printf("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
89 regs->ARM_r3, regs->ARM_r2,
90 regs->ARM_r1, regs->ARM_r0);
91 printf("Flags: %c%c%c%c",
92 flags & CC_N_BIT ? 'N' : 'n',
93 flags & CC_Z_BIT ? 'Z' : 'z',
94 flags & CC_C_BIT ? 'C' : 'c',
95 flags & CC_V_BIT ? 'V' : 'v');
96 printf(" IRQs %s FIQs %s Mode %s%s\n",
97 interrupts_enabled(regs) ? "on" : "off",
98 fast_interrupts_enabled(regs) ? "on" : "off",
99 processor_modes[processor_mode(regs)],
100 thumb_mode(regs) ? " (T)" : "");
103 void do_undefined_instruction(struct pt_regs *pt_regs)
105 printf("undefined instruction\n");
110 void do_software_interrupt(struct pt_regs *pt_regs)
112 printf("software interrupt\n");
117 void do_prefetch_abort(struct pt_regs *pt_regs)
119 printf("prefetch abort\n");
124 void do_data_abort(struct pt_regs *pt_regs)
126 printf("data abort\n");
131 void do_not_used(struct pt_regs *pt_regs)
133 printf("not used\n");
138 void do_fiq(struct pt_regs *pt_regs)
140 printf("fast interrupt request\n");
145 void do_irq(struct pt_regs *pt_regs)
147 printf("interrupt request\n");
152 static ulong timestamp;
153 static ulong lastinc;
155 int interrupt_init (void)
158 tmr = AT91C_BASE_TC0;
160 /* enables TC1.0 clock */
161 *AT91C_PMC_PCER = 1 << AT91C_ID_TC0; /* enable clock */
164 *AT91C_TCB0_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_NONE | AT91C_TCB_TC2XC2S_NONE;
165 tmr->TC_CCR = AT91C_TC_CLKDIS;
166 tmr->TC_CMR = AT91C_TC_TIMER_DIV1_CLOCK; /* set to MCLK/2 */
169 tmr->TC_RC = TIMER_LOAD_VAL;
170 lastinc = TIMER_LOAD_VAL;
171 tmr->TC_CCR = AT91C_TC_SWTRG | AT91C_TC_CLKEN;
177 * timer without interrupts
180 void reset_timer(void)
182 reset_timer_masked();
185 ulong get_timer (ulong base)
187 return get_timer_masked() - base;
190 void set_timer (ulong t)
195 void udelay(unsigned long usec)
200 void reset_timer_masked(void)
203 lastinc = READ_TIMER;
207 ulong get_timer_masked(void)
209 ulong now = READ_TIMER;
213 timestamp += now - lastinc;
215 /* we have an overflow ... */
216 timestamp += now + TIMER_LOAD_VAL - lastinc;
223 void udelay_masked(unsigned long usec)
231 reset_timer_masked();
233 while(get_timer_masked() < tmo);