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| author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-24 14:27:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-24 14:44:01 -0700 |
| commit | eb71c87a492b7090ff9e8ac46912c480a1687e38 (patch) | |
| tree | 1136213dee0f942866b6c2c65de7e7c63ca94fda /include | |
| parent | d384ea691fe4ea8c2dd5b9b8d9042eb181776f18 (diff) | |
| download | linux-eb71c87a492b7090ff9e8ac46912c480a1687e38.tar.gz linux-eb71c87a492b7090ff9e8ac46912c480a1687e38.tar.bz2 linux-eb71c87a492b7090ff9e8ac46912c480a1687e38.zip | |
Add some basic resume trace facilities
Considering that there isn't a lot of hw we can depend on during resume,
this is about as good as it gets.
This is x86-only for now, although the basic concept (and most of the
code) will certainly work on almost any platform.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/rtc.h | 7 | ||||
| -rw-r--r-- | include/linux/resume-trace.h | 30 |
2 files changed, 34 insertions, 3 deletions
diff --git a/include/asm-generic/rtc.h b/include/asm-generic/rtc.h index cef08db34ada..4087037a4225 100644 --- a/include/asm-generic/rtc.h +++ b/include/asm-generic/rtc.h @@ -114,6 +114,7 @@ static inline unsigned int get_rtc_time(struct rtc_time *time) /* Set the current date and time in the real time clock. */ static inline int set_rtc_time(struct rtc_time *time) { + unsigned long flags; unsigned char mon, day, hrs, min, sec; unsigned char save_control, save_freq_select; unsigned int yrs; @@ -131,7 +132,7 @@ static inline int set_rtc_time(struct rtc_time *time) if (yrs > 255) /* They are unsigned */ return -EINVAL; - spin_lock_irq(&rtc_lock); + spin_lock_irqsave(&rtc_lock, flags); #ifdef CONFIG_MACH_DECSTATION real_yrs = yrs; leap_yr = ((!((yrs + 1900) % 4) && ((yrs + 1900) % 100)) || @@ -152,7 +153,7 @@ static inline int set_rtc_time(struct rtc_time *time) * whether the chip is in binary mode or not. */ if (yrs > 169) { - spin_unlock_irq(&rtc_lock); + spin_unlock_irqrestore(&rtc_lock, flags); return -EINVAL; } @@ -187,7 +188,7 @@ static inline int set_rtc_time(struct rtc_time *time) CMOS_WRITE(save_control, RTC_CONTROL); CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT); - spin_unlock_irq(&rtc_lock); + spin_unlock_irqrestore(&rtc_lock, flags); return 0; } diff --git a/include/linux/resume-trace.h b/include/linux/resume-trace.h new file mode 100644 index 000000000000..a376bd4ade39 --- /dev/null +++ b/include/linux/resume-trace.h @@ -0,0 +1,30 @@ +#ifndef RESUME_TRACE_H +#define RESUME_TRACE_H + +#ifdef CONFIG_PM_TRACE + +struct device; +extern void set_trace_device(struct device *); +extern void generate_resume_trace(void *tracedata, unsigned int user); + +#define TRACE_DEVICE(dev) set_trace_device(dev) +#define TRACE_RESUME(user) do { \ + void *tracedata; \ + asm volatile("movl $1f,%0\n" \ + ".section .tracedata,\"a\"\n" \ + "1:\t.word %c1\n" \ + "\t.long %c2\n" \ + ".previous" \ + :"=r" (tracedata) \ + : "i" (__LINE__), "i" (__FILE__)); \ + generate_resume_trace(tracedata, user); \ +} while (0) + +#else + +#define TRACE_DEVICE(dev) do { } while (0) +#define TRACE_RESUME(dev) do { } while (0) + +#endif + +#endif |