From 07b7b0037aac5102939917d7cbe561b5c0d5aa44 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Tue, 6 Mar 2007 07:47:04 +0100 Subject: [PATCH] Speed optimization of AMCC Sequoia/Rainier DDR2 setup As provided by the AMCC applications team, this patch optimizes the DDR2 setup for 166MHz bus speed. The values provided are also save to use on a "normal" 133MHz PLB bus system. Only the refresh counter setup has to be adjusted as done in this patch. For this the NAND booting version had to include the "speed.c" file from the cpu/ppc4xx directory. With this addition the NAND SPL image will just fit into the 4kbytes of program space. gcc version 4.x as provided with ELDK 4.x is needed to generate this optimized code. Signed-off-by: Stefan Roese --- nand_spl/board/amcc/sequoia/Makefile | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'nand_spl') diff --git a/nand_spl/board/amcc/sequoia/Makefile b/nand_spl/board/amcc/sequoia/Makefile index b42da8cf6..510999db0 100644 --- a/nand_spl/board/amcc/sequoia/Makefile +++ b/nand_spl/board/amcc/sequoia/Makefile @@ -30,7 +30,7 @@ AFLAGS += -DCONFIG_NAND_SPL CFLAGS += -DCONFIG_NAND_SPL SOBJS = start.o init.o resetvec.o -COBJS = nand_boot.o ndfc.o sdram.o +COBJS = nand_boot.o ndfc.o sdram.o speed.o SRCS := $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c)) OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) @@ -69,6 +69,10 @@ $(obj)start.S: @rm -f $(obj)start.S ln -s $(SRCTREE)/cpu/ppc4xx/start.S $(obj)start.S +$(obj)speed.c: + @rm -f $(obj)speed.c + ln -s $(SRCTREE)/cpu/ppc4xx/speed.c $(obj)speed.c + # from board directory $(obj)init.S: @rm -f $(obj)init.S -- cgit v1.2.3