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tests: boot_time: cleanup boot_time test to work on ARM

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Enabled the boot_time test on ARM SoCs, set __start_time_stamp on ARM
since we don't have a free running counter similar to TSC on x86.
Also moved to printing the values out as %u to increase the range of
values.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This commit is contained in:
Kumar Gala 2017-06-28 13:14:02 -05:00 • committed by Anas Nashif
commit 534beb34c9
3 changed files with 12 additions and 5 deletions
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6
arch/arm/core/cortex_m/prep_c.c
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@ -87,12 +87,18 @@ extern FUNC_NORETURN void _Cstart(void);
* @return N/A
*/
#ifdef CONFIG_BOOT_TIME_MEASUREMENT
extern u64_t __start_time_stamp;
#endif
void _PrepC(void)
{
relocate_vector_table();
enable_floating_point();
_bss_zero();
_data_copy();
#ifdef CONFIG_BOOT_TIME_MEASUREMENT
__start_time_stamp = 0;
#endif
_Cstart();
CODE_UNREACHABLE;
}