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Customize this for the alpha by removing pc98 defines (unused on alpha)

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as well as saying that the alpha is wired up in a certain way.
This commit is contained in:
Warner Losh 2005-03-16 20:54:48 +00:00
parent 42cfb5bada
commit d564c8537d
1 changed files with 1 additions and 17 deletions
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18
sys/alpha/alpha/timerreg.h
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@ -55,7 +55,7 @@
* in undefined behavior (but hopefully not fry the chip).
* Reading in this manner has no side effects.
*
* [IBM-PC]
* [ALPHA]
* The outputs of the three timers are connected as follows:
*
* timer 0 -> irq 0
@ -64,31 +64,15 @@
*
* Timer 0 is used to call hardclock.
* Timer 2 is used to generate console beeps.
*
* [PC-9801]
* The outputs of the three timers are connected as follows:
*
* timer 0 -> irq 0
* timer 1 -> speaker (via keyboard controller)
* timer 2 -> RS232C
*
* Timer 0 is used to call hardclock.
* Timer 1 is used to generate console beeps.
*/
/*
* Macros for specifying values to be written into a mode register.
*/
#define TIMER_CNTR0 (IO_TIMER1 + 0) /* timer 0 counter port */
#ifdef PC98
#define TIMER_CNTR1 0x3fdb /* timer 1 counter port */
#define TIMER_CNTR2 (IO_TIMER1 + 4) /* timer 2 counter port */
#define TIMER_MODE (IO_TIMER1 + 6) /* timer mode port */
#else
#define TIMER_CNTR1 (IO_TIMER1 + 1) /* timer 1 counter port */
#define TIMER_CNTR2 (IO_TIMER1 + 2) /* timer 2 counter port */
#define TIMER_MODE (IO_TIMER1 + 3) /* timer mode port */
#endif
#define TIMER_SEL0 0x00 /* select counter 0 */
#define TIMER_SEL1 0x40 /* select counter 1 */
#define TIMER_SEL2 0x80 /* select counter 2 */