zephyr/arch/arc/core/Makefile
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

19 lines
532 B
Makefile

ccflags-y += -I$(srctree)/kernel/include
ccflags-y +=-I$(srctree)/arch/$(ARCH)/include
obj-y += thread.o thread_entry_wrapper.o \
cpu_idle.o fast_irq.o fatal.o fault.o \
fault_s.o irq_manage.o cache.o timestamp.o \
isr_wrapper.o regular_irq.o swap.o \
sys_fatal_error_handler.o
obj-y += prep_c.o \
reset.o \
vector_table.o
obj-$(CONFIG_IRQ_OFFLOAD) += irq_offload.o
# Some ARC cores like the EM4 lack the atomic LLOCK/SCOND and
# can't use these.
obj-$(CONFIG_ATOMIC_OPERATIONS_CUSTOM) += atomic.o