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1 #ifndef _ACPI_PMTMR_H_ |
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2 #define _ACPI_PMTMR_H_ |
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3 |
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4 #include <linux/clocksource.h> |
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5 |
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6 /* Number of PMTMR ticks expected during calibration run */ |
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7 #define PMTMR_TICKS_PER_SEC 3579545 |
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8 |
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9 /* limit it to 24 bits */ |
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10 #define ACPI_PM_MASK CLOCKSOURCE_MASK(24) |
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11 |
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12 /* Overrun value */ |
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13 #define ACPI_PM_OVRRUN (1<<24) |
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14 |
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15 #ifdef CONFIG_X86_PM_TIMER |
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16 |
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17 extern u32 acpi_pm_read_verified(void); |
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18 extern u32 pmtmr_ioport; |
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19 |
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20 static inline u32 acpi_pm_read_early(void) |
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21 { |
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22 if (!pmtmr_ioport) |
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23 return 0; |
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24 /* mask the output to 24 bits */ |
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25 return acpi_pm_read_verified() & ACPI_PM_MASK; |
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26 } |
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27 |
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28 extern void pmtimer_wait(unsigned); |
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29 |
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30 #else |
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31 |
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32 static inline u32 acpi_pm_read_early(void) |
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33 { |
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34 return 0; |
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35 } |
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36 |
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37 #endif |
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38 |
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39 #endif |
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40 |