[rtems commit] bsp/mpc5200: Move comment
Sebastian Huber
sebh at rtems.org
Tue Apr 23 07:54:59 UTC 2013
Module: rtems
Branch: master
Commit: e79e9048be54ee612f9410e863aa46fd83639e1a
Changeset: http://git.rtems.org/rtems/commit/?id=e79e9048be54ee612f9410e863aa46fd83639e1a
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Fri Apr 19 13:50:34 2013 +0200
bsp/mpc5200: Move comment
---
c/src/lib/libbsp/powerpc/gen5200/start/start.S | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/c/src/lib/libbsp/powerpc/gen5200/start/start.S b/c/src/lib/libbsp/powerpc/gen5200/start/start.S
index 3d57dc9..35e9390 100644
--- a/c/src/lib/libbsp/powerpc/gen5200/start/start.S
+++ b/c/src/lib/libbsp/powerpc/gen5200/start/start.S
@@ -154,6 +154,14 @@
/* Some fixed values for MPC5x00 registers */
.set CSBOOTROM_VAL, 0x0101D910
.set CSCONTROL_VAL, 0x91000000
+
+/*
+ * The DDR_MODE bit is a read-only status and should be written as 0.
+ *
+ * XLB_CLK = FVCO / 4
+ * IPB_CLK = XLB_CLK / 2
+ * PCI_CLK = IPB_CLK
+ */
.set CFG_VAL, 0x00000100
.extern boot_card
@@ -274,7 +282,7 @@ start:
LWI r30, CFG_VAL /* get CFG register content */
- lwz r30, CFG(r31) /* set SDRAM single data rate / XLB_CLK=FVCO/4 / IPB_CLK=XLB_CLK/2 / PCICLK=IPB_CLK */
+ lwz r30, CFG(r31) /* set CFG register */
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