diff options
Diffstat (limited to 'arch/mips/mipssim/sim_time.c')
-rw-r--r-- | arch/mips/mipssim/sim_time.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/arch/mips/mipssim/sim_time.c b/arch/mips/mipssim/sim_time.c deleted file mode 100644 index 77bad3c04280..000000000000 --- a/arch/mips/mipssim/sim_time.c +++ /dev/null | |||
@@ -1,117 +0,0 @@ | |||
1 | #include <linux/types.h> | ||
2 | #include <linux/init.h> | ||
3 | #include <linux/kernel_stat.h> | ||
4 | #include <linux/sched.h> | ||
5 | #include <linux/spinlock.h> | ||
6 | #include <linux/interrupt.h> | ||
7 | #include <linux/mc146818rtc.h> | ||
8 | #include <linux/smp.h> | ||
9 | #include <linux/timex.h> | ||
10 | |||
11 | #include <asm/hardirq.h> | ||
12 | #include <asm/div64.h> | ||
13 | #include <asm/cpu.h> | ||
14 | #include <asm/setup.h> | ||
15 | #include <asm/time.h> | ||
16 | #include <asm/irq.h> | ||
17 | #include <asm/mc146818-time.h> | ||
18 | #include <asm/msc01_ic.h> | ||
19 | |||
20 | #include <asm/mips-boards/generic.h> | ||
21 | #include <asm/mips-boards/prom.h> | ||
22 | #include <asm/mips-boards/simint.h> | ||
23 | |||
24 | |||
25 | unsigned long cpu_khz; | ||
26 | |||
27 | /* | ||
28 | * Estimate CPU frequency. Sets mips_hpt_frequency as a side-effect | ||
29 | */ | ||
30 | static unsigned int __init estimate_cpu_frequency(void) | ||
31 | { | ||
32 | unsigned int prid = read_c0_prid() & 0xffff00; | ||
33 | unsigned int count; | ||
34 | |||
35 | #if 1 | ||
36 | /* | ||
37 | * hardwire the board frequency to 12MHz. | ||
38 | */ | ||
39 | |||
40 | if ((prid == (PRID_COMP_MIPS | PRID_IMP_20KC)) || | ||
41 | (prid == (PRID_COMP_MIPS | PRID_IMP_25KF))) | ||
42 | count = 12000000; | ||
43 | else | ||
44 | count = 6000000; | ||
45 | #else | ||
46 | unsigned int flags; | ||
47 | |||
48 | local_irq_save(flags); | ||
49 | |||
50 | /* Start counter exactly on falling edge of update flag */ | ||
51 | while (CMOS_READ(RTC_REG_A) & RTC_UIP); | ||
52 | while (!(CMOS_READ(RTC_REG_A) & RTC_UIP)); | ||
53 | |||
54 | /* Start r4k counter. */ | ||
55 | write_c0_count(0); | ||
56 | |||
57 | /* Read counter exactly on falling edge of update flag */ | ||
58 | while (CMOS_READ(RTC_REG_A) & RTC_UIP); | ||
59 | while (!(CMOS_READ(RTC_REG_A) & RTC_UIP)); | ||
60 | |||
61 | count = read_c0_count(); | ||
62 | |||
63 | /* restore interrupts */ | ||
64 | local_irq_restore(flags); | ||
65 | #endif | ||
66 | |||
67 | mips_hpt_frequency = count; | ||
68 | |||
69 | if ((prid != (PRID_COMP_MIPS | PRID_IMP_20KC)) && | ||
70 | (prid != (PRID_COMP_MIPS | PRID_IMP_25KF))) | ||
71 | count *= 2; | ||
72 | |||
73 | count += 5000; /* round */ | ||
74 | count -= count%10000; | ||
75 | |||
76 | return count; | ||
77 | } | ||
78 | |||
79 | static int mips_cpu_timer_irq; | ||
80 | |||
81 | static void mips_timer_dispatch(void) | ||
82 | { | ||
83 | do_IRQ(mips_cpu_timer_irq); | ||
84 | } | ||
85 | |||
86 | |||
87 | unsigned __cpuinit get_c0_compare_int(void) | ||
88 | { | ||
89 | #ifdef MSC01E_INT_BASE | ||
90 | if (cpu_has_veic) { | ||
91 | set_vi_handler(MSC01E_INT_CPUCTR, mips_timer_dispatch); | ||
92 | mips_cpu_timer_irq = MSC01E_INT_BASE + MSC01E_INT_CPUCTR; | ||
93 | |||
94 | return mips_cpu_timer_irq; | ||
95 | } | ||
96 | #endif | ||
97 | if (cpu_has_vint) | ||
98 | set_vi_handler(cp0_compare_irq, mips_timer_dispatch); | ||
99 | mips_cpu_timer_irq = MIPS_CPU_IRQ_BASE + cp0_compare_irq; | ||
100 | |||
101 | return mips_cpu_timer_irq; | ||
102 | } | ||
103 | |||
104 | void __init plat_time_init(void) | ||
105 | { | ||
106 | unsigned int est_freq; | ||
107 | |||
108 | /* Set Data mode - binary. */ | ||
109 | CMOS_WRITE(CMOS_READ(RTC_CONTROL) | RTC_DM_BINARY, RTC_CONTROL); | ||
110 | |||
111 | est_freq = estimate_cpu_frequency(); | ||
112 | |||
113 | printk(KERN_INFO "CPU frequency %d.%02d MHz\n", est_freq / 1000000, | ||
114 | (est_freq % 1000000) * 100 / 1000000); | ||
115 | |||
116 | cpu_khz = est_freq / 1000; | ||
117 | } | ||