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author | Filip Bozuta <Filip.Bozuta@rt-rk.com> | 2020-01-15 20:36:38 +0100 |
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committer | Laurent Vivier <laurent@vivier.eu> | 2020-01-22 15:20:11 +0100 |
commit | abc81bf678941abfb1c003e71cc833bd8b46c7c6 (patch) | |
tree | 247b3042843d42147e8c803539b40385bd6c852d /linux-user/syscall_defs.h | |
parent | fa857eb570bb7ee05a171c59f9b2864dab2357c9 (diff) | |
download | qemu-abc81bf678941abfb1c003e71cc833bd8b46c7c6.zip qemu-abc81bf678941abfb1c003e71cc833bd8b46c7c6.tar.gz qemu-abc81bf678941abfb1c003e71cc833bd8b46c7c6.tar.bz2 |
linux-user: Add support for getting/setting RTC wakeup alarm using ioctls
This patch implements functionalities of following ioctls:
RTC_WKALM_SET, RTC_WKALM_GET - Getting/Setting wakeup alarm
Some RTCs support a more powerful alarm interface, using these
ioctls to read or write the RTC's alarm time (respectively)
with this structure:
struct rtc_wkalrm {
unsigned char enabled;
unsigned char pending;
struct rtc_time time;
};
The enabled flag is used to enable or disable the alarm
interrupt, or to read its current status; when using these
calls, RTC_AIE_ON and RTC_AIE_OFF are not used. The pending
flag is used by RTC_WKALM_RD to report a pending interrupt
(so it's mostly useless on Linux, except when talking to the
RTC managed by EFI firmware). The time field is as used with
RTC_ALM_READ and RTC_ALM_SET except that the tm_mday, tm_mon,
and tm_year fields are also valid. A pointer to this structure
should be passed as the third ioctl's argument.
Implementation notes:
All ioctls in this patch have a pointer to a structure
rtc_wkalrm as their third argument. That is the reason why
corresponding definition is added in linux-user/syscall_types.h.
Since all elements of this structure are either of type
'unsigned char' or 'struct rtc_time' (that was covered in one
of previous patches), the rest of the implementation is
straightforward.
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Filip Bozuta <Filip.Bozuta@rt-rk.com>
Message-Id: <1579117007-7565-5-git-send-email-Filip.Bozuta@rt-rk.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user/syscall_defs.h')
-rw-r--r-- | linux-user/syscall_defs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h index fcbb2ee..c33432a 100644 --- a/linux-user/syscall_defs.h +++ b/linux-user/syscall_defs.h @@ -780,6 +780,8 @@ struct target_pollfd { #define TARGET_RTC_IRQP_SET TARGET_IOW('p', 0x0c, abi_ulong) #define TARGET_RTC_EPOCH_READ TARGET_IOR('p', 0x0d, abi_ulong) #define TARGET_RTC_EPOCH_SET TARGET_IOW('p', 0x0e, abi_ulong) +#define TARGET_RTC_WKALM_RD TARGET_IOR('p', 0x10, struct rtc_wkalrm) +#define TARGET_RTC_WKALM_SET TARGET_IOW('p', 0x0f, struct rtc_wkalrm) #if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SH4) || \ defined(TARGET_XTENSA) |