zephyr/arch/arc
Chuck Jordan ae15a26751 arc: add _tsc_read for 64-bit timestamp
This implementation of _tsc_read returns a 64-bit value that
is derived from the 64-bit tick count multiplied by hwcycles per tick,
and then it adds the current value from the 32-bit timer.
This produces a 64-bit time. There is a bunch of math here, which
could be avoided if the CPU is built with Real-Time-Clock option.
EM Starter Kit SOCs don't have this. I don't think Arduino 101 does
either.

See ZEP-1559

Change-Id: I9f846d170246556ac40fe2f45809e457c6375d8c
Signed-off-by: Chuck Jordan <cjordan@synopsys.com>
2017-02-15 05:55:09 +00:00
..
core arc: add _tsc_read for 64-bit timestamp 2017-02-15 05:55:09 +00:00
include quark_se: PM: Add multicore support 2017-01-24 13:36:55 +00:00
soc pinmux: fix default pinmux driver for quark_se_ss 2017-02-12 00:32:13 +00:00
Kbuild new SoC naming convention 2016-04-18 21:24:59 +00:00
Kconfig arc: enable gen_isr_tables mechanism 2017-02-15 04:54:47 +00:00
Makefile arc: add -fno-delete-null-pointer-checks 2017-01-04 19:06:41 +00:00
defconfig arc: Remove nonexistant Kconfig sybmol from defconfig 2016-07-27 17:14:54 +00:00