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13#ifndef __POWERPC_TIME_H
14#define __POWERPC_TIME_H
15
16#ifdef __KERNEL__
17#include <linux/types.h>
18#include <linux/percpu.h>
19
20#include <asm/processor.h>
21
22
23extern unsigned long tb_ticks_per_jiffy;
24extern unsigned long tb_ticks_per_usec;
25extern unsigned long tb_ticks_per_sec;
26extern struct clock_event_device decrementer_clockevent;
27
28struct rtc_time;
29extern void to_tm(int tim, struct rtc_time * tm);
30extern void GregorianDay(struct rtc_time *tm);
31extern void tick_broadcast_ipi_handler(void);
32
33extern void generic_calibrate_decr(void);
34
35extern void set_dec_cpu6(unsigned int val);
36
37
38extern unsigned long ppc_proc_freq;
39#define DEFAULT_PROC_FREQ (DEFAULT_TB_FREQ * 8)
40extern unsigned long ppc_tb_freq;
41#define DEFAULT_TB_FREQ 125000000UL
42
43struct div_result {
44 u64 result_high;
45 u64 result_low;
46};
47
48
49
50#ifdef CONFIG_6xx
51#define __USE_RTC() (!cpu_has_feature(CPU_FTR_USE_TB))
52#else
53#define __USE_RTC() 0
54#endif
55
56#ifdef CONFIG_PPC64
57
58
59#define get_tbl get_tb
60
61#else
62
63static inline unsigned long get_tbl(void)
64{
65#if defined(CONFIG_403GCX)
66 unsigned long tbl;
67 asm volatile("mfspr %0, 0x3dd" : "=r" (tbl));
68 return tbl;
69#else
70 return mftbl();
71#endif
72}
73
74static inline unsigned int get_tbu(void)
75{
76#ifdef CONFIG_403GCX
77 unsigned int tbu;
78 asm volatile("mfspr %0, 0x3dc" : "=r" (tbu));
79 return tbu;
80#else
81 return mftbu();
82#endif
83}
84#endif
85
86static inline unsigned int get_rtcl(void)
87{
88 unsigned int rtcl;
89
90 asm volatile("mfrtcl %0" : "=r" (rtcl));
91 return rtcl;
92}
93
94static inline u64 get_rtc(void)
95{
96 unsigned int hi, lo, hi2;
97
98 do {
99 asm volatile("mfrtcu %0; mfrtcl %1; mfrtcu %2"
100 : "=r" (hi), "=r" (lo), "=r" (hi2));
101 } while (hi2 != hi);
102 return (u64)hi * 1000000000 + lo;
103}
104
105static inline u64 get_vtb(void)
106{
107#ifdef CONFIG_PPC_BOOK3S_64
108 if (cpu_has_feature(CPU_FTR_ARCH_207S))
109 return mfvtb();
110#endif
111 return 0;
112}
113
114#ifdef CONFIG_PPC64
115static inline u64 get_tb(void)
116{
117 return mftb();
118}
119#else
120static inline u64 get_tb(void)
121{
122 unsigned int tbhi, tblo, tbhi2;
123
124 do {
125 tbhi = get_tbu();
126 tblo = get_tbl();
127 tbhi2 = get_tbu();
128 } while (tbhi != tbhi2);
129
130 return ((u64)tbhi << 32) | tblo;
131}
132#endif
133
134static inline u64 get_tb_or_rtc(void)
135{
136 return __USE_RTC() ? get_rtc() : get_tb();
137}
138
139static inline void set_tb(unsigned int upper, unsigned int lower)
140{
141 mtspr(SPRN_TBWL, 0);
142 mtspr(SPRN_TBWU, upper);
143 mtspr(SPRN_TBWL, lower);
144}
145
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150
151
152static inline unsigned int get_dec(void)
153{
154#if defined(CONFIG_40x)
155 return (mfspr(SPRN_PIT));
156#else
157 return (mfspr(SPRN_DEC));
158#endif
159}
160
161
162
163
164
165
166static inline void set_dec(int val)
167{
168#if defined(CONFIG_40x)
169 mtspr(SPRN_PIT, val);
170#elif defined(CONFIG_8xx_CPU6)
171 set_dec_cpu6(val - 1);
172#else
173#ifndef CONFIG_BOOKE
174 --val;
175#endif
176 mtspr(SPRN_DEC, val);
177#endif
178}
179
180static inline unsigned long tb_ticks_since(unsigned long tstamp)
181{
182 if (__USE_RTC()) {
183 int delta = get_rtcl() - (unsigned int) tstamp;
184 return delta < 0 ? delta + 1000000000 : delta;
185 }
186 return get_tbl() - tstamp;
187}
188
189#define mulhwu(x,y) \
190({unsigned z; asm ("mulhwu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;})
191
192#ifdef CONFIG_PPC64
193#define mulhdu(x,y) \
194({unsigned long z; asm ("mulhdu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;})
195#else
196extern u64 mulhdu(u64, u64);
197#endif
198
199extern void div128_by_32(u64 dividend_high, u64 dividend_low,
200 unsigned divisor, struct div_result *dr);
201
202
203
204struct cpu_usage {
205 u64 current_tb;
206};
207
208DECLARE_PER_CPU(struct cpu_usage, cpu_usage_array);
209
210extern void secondary_cpu_time_init(void);
211
212DECLARE_PER_CPU(u64, decrementers_next_tb);
213
214
215unsigned long long tb_to_ns(unsigned long long tb_ticks);
216
217#endif
218#endif
219