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authorPatrick Rudolph <siro@das-labor.org>2015-07-12 17:01:42 +0200
committerPatrick Georgi <pgeorgi@google.com>2015-07-22 18:10:51 +0200
commite324cc91e09662ef5edb84f8160bbfa830bc701b (patch)
treed3c6ff0ecfa16e8cda8f24d30141ee8281460e8d /src/northbridge
parent0620b1e8a3097a1b1fd5f8e29839fec393723b81 (diff)
intel raminit: rewrite timB high adjust calculation
Found while doing code review. Simplify the code by using a loop for positive and negative phase adjustments. Change-Id: I0980443d0d2815bccef969709fddecc07d61a788 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: http://review.coreboot.org/10890 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-by: Nicolas Reinecke <nr@das-labor.org>
Diffstat (limited to 'src/northbridge')
-rw-r--r--src/northbridge/intel/sandybridge/raminit_native.c23
1 files changed, 11 insertions, 12 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit_native.c b/src/northbridge/intel/sandybridge/raminit_native.c
index 0708f47730..790f47c46c 100644
--- a/src/northbridge/intel/sandybridge/raminit_native.c
+++ b/src/northbridge/intel/sandybridge/raminit_native.c
@@ -2288,18 +2288,17 @@ static int get_timB_high_adjust(u64 val)
if (val == 0xffffffffffffffffLL)
return 0;
- if (val >= 0xfffffffffffff000LL)
- return 3;
- if (val >= 0xfffffffffff00000LL)
- return -1;
- if (val >= 0xfffffff000000000LL)
- return -2;
- if (val >= 0xfff0000000000000LL)
- return -3;
-
- for (i = 0; i < 8; i++)
- if (val >> (8 * (7 - i) + 4))
- return i;
+ if (val >= 0xf000000000000000LL) {
+ /* needs negative adjustment */
+ for (i = 0; i < 8; i++)
+ if (val << (8 * (7 - i) + 4))
+ return -i;
+ } else {
+ /* needs positive adjustment */
+ for (i = 0; i < 8; i++)
+ if (val >> (8 * (7 - i) + 4))
+ return i;
+ }
return 8;
}