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