u-boot-brain/arch/arm/cpu
Che-Liang Chiou f24869d3a8 Exynos: Add timer_get_us function
timer_get_us returns the time in microseconds since a certain reference
point of history.  However, it does not guarantee to return an accurate
time after a long period; instead, it wraps around (that is, the
reference point is reset to some other point of history) after some
periods. The frequency of wrapping around is about an hour (or 2^32
microseconds).

Test with command "sf probe 1:0; time sf read 40008000 0 1000".
Try with different numbers of bytes and see that sane values are obtained

Signed-off-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2013-04-01 14:02:08 +09:00
..
arm720t Merge branch 'master' of git://git.denx.de/u-boot-arm 2013-03-18 14:37:18 -04:00
arm920t Merge branch 'master' of git://git.denx.de/u-boot-arm 2013-03-18 14:37:18 -04:00
arm925t Replace __bss_end__ with __bss_end 2013-03-15 16:13:54 -04:00
arm926ejs Merge branch 'master' of git://git.denx.de/u-boot-arm 2013-03-18 14:37:18 -04:00
arm946es Replace __bss_end__ with __bss_end 2013-03-15 16:13:54 -04:00
arm1136 Merge branch 'master' of git://git.denx.de/u-boot-arm 2013-03-18 14:37:18 -04:00
arm1176 ARM: bcm2835: add mailbox driver 2013-03-20 15:29:20 +01:00
arm_intcm Replace __bss_end__ with __bss_end 2013-03-15 16:13:54 -04:00
armv7 Exynos: Add timer_get_us function 2013-04-01 14:02:08 +09:00
ixp Merge branch 'master' of git://git.denx.de/u-boot-arm 2013-03-18 14:37:18 -04:00
pxa Replace __bss_end__ with __bss_end 2013-03-15 16:13:54 -04:00
s3c44b0 Replace __bss_end__ with __bss_end 2013-03-15 16:13:54 -04:00
sa1100 Replace __bss_end__ with __bss_end 2013-03-15 16:13:54 -04:00
tegra20-common tegra: rename FUNCMUX_UART2_UARTB 2013-02-11 10:35:24 -07:00
tegra30-common Tegra30: Cardhu: Add pad config tables/code based on pinmux code 2013-03-14 11:06:43 -07:00
tegra114-common Tegra114: Dalmore: Add pad config tables/code based on pinmux code 2013-03-14 11:49:14 -07:00
tegra-common Merge branch 'master' of git://git.denx.de/u-boot-arm 2013-02-12 10:18:31 -05:00
u-boot-spl.lds Merge branch 'master' of git://git.denx.de/u-boot-arm 2013-03-18 14:37:18 -04:00
u-boot.lds Merge branch 'master' of git://git.denx.de/u-boot-arm 2013-03-18 14:37:18 -04:00