afa8862328
a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.
44 lines
932 B
C
44 lines
932 B
C
/*
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* Kernel interface to machine-dependent clock driver.
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* Garrett Wollman, September 1994.
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* This file is in the public domain.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_CLOCK_H_
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#define _MACHINE_CLOCK_H_
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#ifdef _KERNEL
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/*
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* i386 to clock driver interface.
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* XXX large parts of the driver and its interface are misplaced.
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*/
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extern int adjkerntz;
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extern int disable_rtc_set;
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extern int pscnt;
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extern int psdiv;
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extern int statclock_disable;
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extern u_int timer_freq;
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extern int timer0_max_count;
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extern uint64_t tsc_freq;
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extern int tsc_is_broken;
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extern int wall_cmos_clock;
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/*
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* Driver to clock driver interface.
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*/
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struct clockframe;
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int acquire_timer0(int rate, void (*function)(struct clockframe *frame));
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int acquire_timer2(int mode);
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int release_timer0(void);
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int release_timer2(void);
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int rtcin(int val);
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int sysbeep(int pitch, int period);
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void init_TSC(void);
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#endif /* _KERNEL */
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#endif /* !_MACHINE_CLOCK_H_ */
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