From e79e9048be54ee612f9410e863aa46fd83639e1a Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Fri, 19 Apr 2013 13:50:34 +0200 Subject: bsp/mpc5200: Move comment --- c/src/lib/libbsp/powerpc/gen5200/start/start.S | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/c/src/lib/libbsp/powerpc/gen5200/start/start.S b/c/src/lib/libbsp/powerpc/gen5200/start/start.S index 3d57dc924d..35e9390d7f 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 */ -- cgit v1.2.3