Le 15/01/2020 à 20:36, Filip Bozuta a écrit :
> This patch implements functionalities of following ioctls:
>
> RTC_IRQP_READ, RTC_IRQP_SET - Getting/Setting IRQ rate
>
> Read and set the frequency for periodic interrupts, for RTCs
> that support periodic interrupts. The periodic interrupt must
> be separately enabled or disabled using the RTC_PIE_ON,
> RTC_PIE_OFF requests. The third ioctl's argument is an
> unsigned long * or an unsigned long, respectively. The value
> is the frequency in interrupts per second. The set of allow‐
> able frequencies is the multiples of two in the range 2 to
> 8192. Only a privileged process (i.e., one having the
> CAP_SYS_RESOURCE capability) can set frequencies above the
> value specified in /proc/sys/dev/rtc/max-user-freq. (This
> file contains the value 64 by default.)
>
> RTC_EPOCH_READ, RTC_EPOCH_SET - Getting/Setting epoch
>
> Many RTCs encode the year in an 8-bit register which is either
> interpreted as an 8-bit binary number or as a BCD number. In
> both cases, the number is interpreted relative to this RTC's
> Epoch. The RTC's Epoch is initialized to 1900 on most systems
> but on Alpha and MIPS it might also be initialized to 1952,
> 1980, or 2000, depending on the value of an RTC register for
> the year. With some RTCs, these operations can be used to
> read or to set the RTC's Epoch, respectively. The third
> ioctl's argument is an unsigned long * or an unsigned long,
> respectively, and the value returned (or assigned) is the
> Epoch. To set the RTC's Epoch the process must be privileged
> (i.e., have the CAP_SYS_TIME capability).
>
> Implementation notes:
>
> All ioctls in this patch have a pointer to 'ulong' as their
> third argument. That is the reason why corresponding parts
> of added code in linux-user/syscall_defs.h contain special
> handling related to 'ulong' type: they use 'abi_ulong' type
> to make sure that ioctl's code is calculated correctly for
> both 32-bit and 64-bit targets. Also, 'MK_PTR(TYPE_ULONG)'
> is used for the similar reason in linux-user/ioctls.h.
>
> Reviewed-by: Laurent Vivier <laur...@vivier.eu>
> Signed-off-by: Filip Bozuta <filip.boz...@rt-rk.com>
> ---
> linux-user/ioctls.h | 4 ++++
> linux-user/syscall_defs.h | 4 ++++
> 2 files changed, 8 insertions(+)
>
> diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
> index f472794..accbdee 100644
> --- a/linux-user/ioctls.h
> +++ b/linux-user/ioctls.h
> @@ -81,6 +81,10 @@
> IOCTL(RTC_ALM_SET, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtc_time)))
> IOCTL(RTC_RD_TIME, IOC_R, MK_PTR(MK_STRUCT(STRUCT_rtc_time)))
> IOCTL(RTC_SET_TIME, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtc_time)))
> + IOCTL(RTC_IRQP_READ, IOC_R, MK_PTR(TYPE_ULONG))
> + IOCTL(RTC_IRQP_SET, IOC_W, TYPE_ULONG)
> + IOCTL(RTC_EPOCH_READ, IOC_R, MK_PTR(TYPE_ULONG))
> + IOCTL(RTC_EPOCH_SET, IOC_W, TYPE_ULONG)
>
> IOCTL(BLKROSET, IOC_W, MK_PTR(TYPE_INT))
> IOCTL(BLKROGET, IOC_R, MK_PTR(TYPE_INT))
> diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
> index f0bf09d..bbfa935 100644
> --- a/linux-user/syscall_defs.h
> +++ b/linux-user/syscall_defs.h
> @@ -776,6 +776,10 @@ struct target_pollfd {
> #define TARGET_RTC_ALM_SET TARGET_IOW('p', 0x07, struct rtc_time)
> #define TARGET_RTC_RD_TIME TARGET_IOR('p', 0x09, struct rtc_time)
> #define TARGET_RTC_SET_TIME TARGET_IOW('p', 0x0a, struct rtc_time)
> +#define TARGET_RTC_IRQP_READ TARGET_IOR('p', 0x0b, abi_ulong)
> +#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)
>
> #if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SH4) ||
> \
> defined(TARGET_XTENSA)
>
Applied to my linux-user branch.
Thanks,
Laurent
