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| author | Anshuman Khandual <khandual@linux.vnet.ibm.com> | 2014-08-13 14:27:45 +0530 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-08-13 19:01:36 +1000 |
| commit | 087e04598ed74146c2f2eab5666cd4d4b53b6974 (patch) | |
| tree | d0d4c15c2f4fae090f05cda1a2df20d51baf7d46 /include/timebase.h | |
| parent | 0a22f85f524f366a3e2ef2af4a3faa0e9cef26ca (diff) | |
| download | skiboot-087e04598ed74146c2f2eab5666cd4d4b53b6974.zip skiboot-087e04598ed74146c2f2eab5666cd4d4b53b6974.tar.gz skiboot-087e04598ed74146c2f2eab5666cd4d4b53b6974.tar.bz2 | |
dpo: Add OPAL interface to access the DPO timeout
This patch adds a OPAL interface to fetch the DPO timeout. This
functionality is required to synchronously query Sapphire about
how much seconds are remaining for a forced system shutdown which
is useful in cases where the host has missed the OPAL_MSG_DPO for
some reason like system boot, reboot or kexec operations. This
ensures host can still query about the DPO timeout status and act.
This patch also adds helper routine to convert time base into seconds.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/timebase.h')
| -rw-r--r-- | include/timebase.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/timebase.h b/include/timebase.h index a1b787f..4537256 100644 --- a/include/timebase.h +++ b/include/timebase.h @@ -57,6 +57,11 @@ static inline unsigned long secs_to_tb(unsigned long secs) return secs * tb_hz; } +static inline unsigned long tb_to_secs(unsigned long tb) +{ + return tb / tb_hz; +} + static inline unsigned long msecs_to_tb(unsigned long msecs) { return msecs * (tb_hz / 1000); |