Re: [tyndur-devel] [PATCH] kernel2: PIT initialisieren

[Max Reitz <max@xxxxxxxxxx>]

(2010年11月01日 15:03), Kevin Wolf wrote:
> + kernel2: PIT initialisieren
> 
> Signed-off-by: Kevin Wolf <kevin@xxxxxxxxxx>
> ---
>  src/kernel2/src/timer.c |   15 +++++++++++++++
>  1 files changed, 15 insertions(+), 0 deletions(-)
> 
> diff --git a/src/kernel2/src/timer.c b/src/kernel2/src/timer.c
> index 6535e12..33d0dcb 100644
> --- a/src/kernel2/src/timer.c
> +++ b/src/kernel2/src/timer.c
> @@ -37,6 +37,7 @@
>  #include <stdbool.h>
>  #include <collections.h>
>  #include <stdlib.h>
> +#include <ports.h>
>  
>  #include "timer.h"
>  #include "syscall.h"
> @@ -61,12 +62,26 @@ struct timeout {
>      uint64_t        timeout;
>  };
>  
> +#define PIT_COUNTER_0       (0x0 << 6)
> +#define PIT_RW_LO_BYTE      (0x1 << 4)
> +#define PIT_RW_HI_BYTE      (0x2 << 4)
> +#define PIT_RW_FULL         (0x3 << 4)
> +#define PIT_MODE_2_RATE_GEN (0x2 << 1)
> +
>  /**
>   * Initialisiert die Timerverwaltung
>   */
>  void timer_init(void)
>  {
> +    uint16_t reload_value;
> +
>      timers = list_create();
> +
> +    // PIT initialisieren
> +    reload_value = 1193182 / CONFIG_TIMER_HZ;
> +    outb(0x43, PIT_COUNTER_0 | PIT_RW_FULL | PIT_MODE_2_RATE_GEN);
> +    outb(0x40, reload_value & 0xff);
> +    outb(0x40, reload_value >> 8);
>  }
>  
>  /**

Mein Wiki sagt zwar 1193180 statt 1193182, aber ansonsten sieht das soweit in Ordnung aus (ohne, dass man viel falsch machen könnte). *g*

Acked-by: Max Reitz <max@xxxxxxxxxx>