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Michael Brown 302f1eeb80 [time] Allow timer to be selected at runtime ... Allow the active timer (providing udelay() and currticks()) to be selected at runtime based on probing during the INIT_EARLY stage of initialisation. TICKS_PER_SEC is now a fixed compile-time constant for all builds, and is independent of the underlying clock tick rate. We choose the value 1024 to allow multiplications and divisions on seconds to be converted to bit shifts. TICKS_PER_MS is defined as 1, allowing multiplications and divisions on milliseconds to be omitted entirely. The 2% inaccuracy in this definition is negligible when using the standard BIOS timer (running at around 18.2Hz). TIMER_RDTSC now checks for a constant TSC before claiming to be a usable timer. (This timer can be tested in KVM via the command-line option "-cpu host,+invtsc".) Signed-off-by: Michael Brown <mcb30@ipxe.org>		2017-01-26 08:17:37 +00:00
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core	[arm] Add support for 64-bit ARM (Aarch64)	2016-05-08 00:20:20 +01:00
include	[time] Allow timer to be selected at runtime	2017-01-26 08:17:37 +00:00
interface/efi	[arm] Add support for 32-bit ARM	2016-05-06 12:08:44 +01:00
Makefile	[arm] Split out 32-bit-specific code to arch/arm32	2016-05-08 00:18:35 +01:00
Makefile.efi	[arm] Split out 32-bit-specific code to arch/arm32	2016-05-08 00:18:35 +01:00