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authorFilip Bozuta <Filip.Bozuta@rt-rk.com>2020-01-15 20:36:35 +0100
committerLaurent Vivier <laurent@vivier.eu>2020-01-22 15:18:21 +0100
commit68365f969c8229b0a9c111bafcd6683bb0ec6a55 (patch)
tree2f0189dc8e662ac377d81497f2efa53b8cabb231 /linux-user/syscall_defs.h
parentc858e537a9eb2e2b788ec323125462ea0991bd93 (diff)
linux-user: Add support for enabling/disabling RTC features using ioctls
This patch implements functionalities of following ioctls: RTC_AIE_ON, RTC_AIE_OFF - Alarm interrupt enabling on/off Enable or disable the alarm interrupt, for RTCs that support alarms. The third ioctl's argument is ignored. RTC_UIE_ON, RTC_UIE_OFF - Update interrupt enabling on/off Enable or disable the interrupt on every clock update, for RTCs that support this once-per-second interrupt. The third ioctl's argument is ignored. RTC_PIE_ON, RTC_PIE_OFF - Periodic interrupt enabling on/off Enable or disable the periodic interrupt, for RTCs that sup‐ port these periodic interrupts. The third ioctl's argument is ignored. Only a privileged process (i.e., one having the CAP_SYS_RESOURCE capability) can enable the periodic interrupt if the frequency is currently set above the value specified in /proc/sys/dev/rtc/max-user-freq. RTC_WIE_ON, RTC_WIE_OFF - Watchdog interrupt enabling on/off Enable or disable the Watchdog interrupt, for RTCs that sup- port this Watchdog interrupt. The third ioctl's argument is ignored. Implementation notes: Since all of involved ioctls have NULL as their third argument, their implementation was straightforward. The line '#include <linux/rtc.h>' was added to recognize preprocessor definitions for these ioctls. This needs to be done only once in this series of commits. Also, the content of this file (with respect to ioctl definitions) remained unchanged for a long time, therefore there is no need to worry about supporting older Linux kernel version. Reviewed-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Filip Bozuta <Filip.Bozuta@rt-rk.com> Message-Id: <1579117007-7565-2-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.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index fb8318d121..fc3d79ab97 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -763,6 +763,16 @@ struct target_pollfd {
#define TARGET_KDSETLED 0x4B32 /* set led state [lights, not flags] */
#define TARGET_KDSIGACCEPT 0x4B4E
+/* real time clock ioctls */
+#define TARGET_RTC_AIE_ON TARGET_IO('p', 0x01)
+#define TARGET_RTC_AIE_OFF TARGET_IO('p', 0x02)
+#define TARGET_RTC_UIE_ON TARGET_IO('p', 0x03)
+#define TARGET_RTC_UIE_OFF TARGET_IO('p', 0x04)
+#define TARGET_RTC_PIE_ON TARGET_IO('p', 0x05)
+#define TARGET_RTC_PIE_OFF TARGET_IO('p', 0x06)
+#define TARGET_RTC_WIE_ON TARGET_IO('p', 0x0f)
+#define TARGET_RTC_WIE_OFF TARGET_IO('p', 0x10)
+
#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SH4) || \
defined(TARGET_XTENSA)
#define TARGET_FIOGETOWN TARGET_IOR('f', 123, int)