Re: [SeaBIOS] [PATCH] rtc: Support disabling the RTC timer irq support

[Paul Menzel]

Dear Kevin,

Am Montag, den 17.08.2015, 12:23 -0400 schrieb Kevin O'Connor:
> Add a build time config option to remove support for RTC timer
> interrupts along with the associated bios calls requiring that
> support.
> Signed-off-by: Kevin O'Connor
>
> src/Kconfig  |  9 +++++++++
>  src/clock.c  | 13 ++++++++++++-
>  src/hw/rtc.c |  6 ++++++
>  src/stacks.c |  2 +-
>  4 files changed, 28 insertions(+), 2 deletions(-)
>
> diff --git a/src/Kconfig b/src/Kconfig
> index 6256242..56a1b2f 100644
> --- a/src/Kconfig
> +++ b/src/Kconfig
> @@ -299,6 +299,15 @@ menu "Hardware support"
>          default y
>          help
>              Support parallel ports. This also enables int 17 parallel port calls.
> config RTC_TIMER
>    bool "Real Time Clock (RTC) scheduling"
>    default y
>    help
>        Support MC146818 Real Time Clock chip timer
>        interrupts. This also enables int 1583 and int 1586 calls.
>        Disabling this support does not disable access to the RTC
>        cmos registers.

[…]

what is the use case for this option, that means, what are the
circumstances that users might disable it?

The size and speed benefit is probably minimal.

Thanks,

Paul