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Timers are sometimes required before the call to initialise(), so we
cannot rely on initialise() to set up the timers before use.
Also fix a potential integer overflow issue in generic_currticks_udelay()
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Add missing comments to timer code.
Lock system if no suitable timer source is found.
Fix initialisation order so that timers are initialised before code that
needs to use them.
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Replace a printf with a DBG in timer_rtdsc.c
Replace a printf in timer.c with assert
Return proper error codes from timer drivers
Signed-off-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>
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Timer subsystem initialization code in core/timer.c
Split the BIOS and RTDSC timer drivers from i386_timer.c
Split arch/i386/firmware/pcbios/bios.c into the RTSDC
timer driver and arch/i386/core/nap.c
Split the headers properly:
include/unistd.h - delay functions to be used by the
gPXE core and drivers.
include/gpxe/timer.h - the fimer subsystem interface
to be used by the timer drivers
and currticks() to be used by
the code gPXE subsystems.
include/latch.h - removed
include/timer.h - scheduled for removal. Some driver
are using currticks, which is
only for core subsystems.
Signed-off-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>
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Kill off use of etherboot.h outside drivers/net.
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stack or INT 13 emulator etc.
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