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/*
* timer.h: Definitions for the timer chips on the Sparc.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SPARC_TIMER_H
#define _SPARC_TIMER_H
#include <asm/system.h> /* For SUN4M_NCPUS */
#include <asm/btfixup.h>
/* Timer structures. The interrupt timer has two properties which
* are the counter (which is handled in do_timer in sched.c) and the limit.
* This limit is where the timer's counter 'wraps' around. Oddly enough,
* the sun4c timer when it hits the limit wraps back to 1 and not zero
* thus when calculating the value at which it will fire a microsecond you
* must adjust by one. Thanks SUN for designing such great hardware ;(
*/
/* Note that I am only going to use the timer that interrupts at
* Sparc IRQ 10. There is another one available that can fire at
* IRQ 14. Currently it is left untouched, we keep the PROM's limit
* register value and let the prom take these interrupts. This allows
* L1-A to work.
*/
struct sun4c_timer_info {
__volatile__ unsigned int cur_count10;
__volatile__ unsigned int timer_limit10;
__volatile__ unsigned int cur_count14;
__volatile__ unsigned int timer_limit14;
};
#define SUN_TIMER_PHYSADDR 0xf3000000
#define SUN4D_PRM_CNT_L 0x80000000
#define SUN4D_PRM_CNT_LVALUE 0x7FFFFC00
struct sun4d_timer_regs {
volatile unsigned int l10_timer_limit;
volatile unsigned int l10_cur_countx;
volatile unsigned int l10_limit_noclear;
volatile unsigned int ctrl;
volatile unsigned int l10_cur_count;
};
extern struct sun4d_timer_regs *sun4d_timers;
extern __volatile__ unsigned int *master_l10_counter;
extern __volatile__ unsigned int *master_l10_limit;
/* FIXME: Make do_[gs]ettimeofday btfixup calls */
BTFIXUPDEF_CALL(int, bus_do_settimeofday, struct timespec *tv)
#define bus_do_settimeofday(tv) BTFIXUP_CALL(bus_do_settimeofday)(tv)
#endif /* !(_SPARC_TIMER_H) */
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