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https://gitlab.com/chrony/chrony.git
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29953d6ddb
Use local definitions for the ioctl codes needed to access the RTC. Note : not tested. Some architectures not handled yet.
64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/* Taken from <asm-$foo/ioctl.h> in the Linux kernel sources.
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* The ioctl.h file is pretty similar from one architecture to another.
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* */
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#ifndef IO_LINUX_H
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#define IO_LINUX_H
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/* Hmm. These constants vary a bit between systems. */
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/* (__sh__ includes both sh and sh64) */
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#if defined(__i386__) || defined(__sh__)
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#define _IOC_NRBITS 8
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#define _IOC_TYPEBITS 8
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#define _IOC_SIZEBITS 14
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#define _IOC_DIRBITS 2
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#define _IOC_NONE 0U
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#define _IOC_WRITE 1U
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#define _IOC_READ 2U
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#elif defined(__alpha__) || defined(__sparc__)
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#define _IOC_NRBITS 8
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#define _IOC_TYPEBITS 8
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#define _IOC_SIZEBITS 13
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#define _IOC_DIRBITS 2
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#define _IOC_NONE 1U
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#define _IOC_READ 2U
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#define _IOC_WRITE 4U
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#else
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#error "I don't know the values of the _IOC_* constants for your architecture"
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#endif
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#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
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#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
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#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
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#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
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#define _IOC_NRSHIFT 0
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#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
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#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
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#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
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#define _IOC(dir,type,nr,size) \
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(((dir) << _IOC_DIRSHIFT) | \
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((type) << _IOC_TYPESHIFT) | \
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((nr) << _IOC_NRSHIFT) | \
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((size) << _IOC_SIZESHIFT))
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/* used to create numbers */
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#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
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#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
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#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
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#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
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#define RTC_UIE_ON _IO('p', 0x03) /* Update int. enable on */
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#define RTC_UIE_OFF _IO('p', 0x04) /* ... off */
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#define RTC_RD_TIME _IOR('p', 0x09, struct rtc_time) /* Read RTC time */
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#define RTC_SET_TIME _IOW('p', 0x0a, struct rtc_time) /* Set RTC time */
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/* From mc146818.h */
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#define RTC_UIE 0x10 /* update-finished interrupt enable */
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#endif
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