The ASSERT and DEASSERT, if I remember well, if a part of SIPI algorithm. I
think that I extracted it from the Intel manuals. Or maybe from OSDev.
El domingo 11 de febrero de 2024, Damien Zammit escribió:
> Wait for ICR then just assert the signal.
> No need for deassert. This is how Linux and NetBSD does it.
> I couldn't find documentation on the correct method, however.
> ---
> i386/i386/smp.c | 8 +-------
> 1 file changed, 1 insertion(+), 7 deletions(-)
>
> diff --git a/i386/i386/smp.c b/i386/i386/smp.c
> index 05e9de67..a758eea3 100644
> --- a/i386/i386/smp.c
> +++ b/i386/i386/smp.c
> @@ -54,17 +54,11 @@ static void smp_send_ipi(unsigned apic_id, unsigned
> vector)
>
> cpu_intr_save(&flags);
>
> - apic_send_ipi(NO_SHORTHAND, FIXED, PHYSICAL, ASSERT, EDGE, vector,
> apic_id);
> -
> do {
> cpu_pause();
> } while(lapic->icr_low.delivery_status == SEND_PENDING);
>
> - apic_send_ipi(NO_SHORTHAND, FIXED, PHYSICAL, DE_ASSERT, EDGE, vector,
> apic_id);
> -
> - do {
> - cpu_pause();
> - } while(lapic->icr_low.delivery_status == SEND_PENDING);
> + apic_send_ipi(NO_SHORTHAND, FIXED, PHYSICAL, ASSERT, EDGE, vector,
> apic_id);
>
> cpu_intr_restore(flags);
> }
> --
> 2.43.0
>
>
>
>
--
Enviado desde mi dispositivo Sailfish
