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[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 <sr@denx.de>
utp
Stefan Roese 2007-03-06 07:47:04 +01:00
parent fdd1d6dcc9
commit 07b7b0037a
3 changed files with 26 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
board/amcc/sequoia/sdram.c
View File

@ -6,7 +6,7 @@
* Alain Saurel, AMCC/IBM, alain.saurel@fr.ibm.com
* Robert Snyder, AMCC/IBM, rob.snyder@fr.ibm.com
*
* (C) Copyright 2006
* (C) Copyright 2006-2007
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* This program is free software; you can redistribute it and/or
@ -379,16 +379,18 @@ void denali_core_search_data_eye(unsigned long memory_size)
long int initdram (int board_type)
{
#if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL)
ulong speed = get_bus_freq(0);
mtsdram(DDR0_02, 0x00000000);
mtsdram(DDR0_00, 0x0000190A);
mtsdram(DDR0_01, 0x01000000);
mtsdram(DDR0_03, 0x02030602);
mtsdram(DDR0_04, 0x13030300);
mtsdram(DDR0_05, 0x0202050E);
mtsdram(DDR0_06, 0x0104C823);
mtsdram(DDR0_04, 0x0A020200);
mtsdram(DDR0_05, 0x02020308);
mtsdram(DDR0_06, 0x0102C812);
mtsdram(DDR0_07, 0x000D0100);
mtsdram(DDR0_08, 0x02360001);
mtsdram(DDR0_08, 0x02430001);
mtsdram(DDR0_09, 0x00011D5F);
mtsdram(DDR0_10, 0x00000300);
mtsdram(DDR0_11, 0x0027C800);
@ -402,13 +404,16 @@ long int initdram (int board_type)
mtsdram(DDR0_22, 0x00267F0B);
mtsdram(DDR0_23, 0x00000000);
mtsdram(DDR0_24, 0x01010002);
mtsdram(DDR0_26, 0x5B260181);
if (speed > 133333333)
mtsdram(DDR0_26, 0x5B26050C);
else
mtsdram(DDR0_26, 0x5B260408);
mtsdram(DDR0_27, 0x0000682B);
mtsdram(DDR0_28, 0x00000000);
mtsdram(DDR0_31, 0x00000000);
mtsdram(DDR0_42, 0x01000006);
mtsdram(DDR0_43, 0x050A0200);
mtsdram(DDR0_44, 0x00000005);
mtsdram(DDR0_43, 0x030A0200);
mtsdram(DDR0_44, 0x00000003);
mtsdram(DDR0_02, 0x00000001);
wait_for_dlllock();

16
include/ppc440.h
View File

@ -3293,26 +3293,26 @@ typedef struct { unsigned long add; /* gpio core base address */
/*
* Macros for accessing the indirect EBC registers
*/
#define mtebc(reg, data) { mtdcr(ebccfga,reg);mtdcr(ebccfgd,data); }
#define mfebc(reg, data) { mtdcr(ebccfga,reg);data = mfdcr(ebccfgd); }
#define mtebc(reg, data) do { mtdcr(ebccfga,reg);mtdcr(ebccfgd,data); } while (0)
#define mfebc(reg, data) do { mtdcr(ebccfga,reg);data = mfdcr(ebccfgd); } while (0)
/*
* Macros for accessing the indirect SDRAM controller registers
*/
#define mtsdram(reg, data) { mtdcr(memcfga,reg);mtdcr(memcfgd,data); }
#define mfsdram(reg, data) { mtdcr(memcfga,reg);data = mfdcr(memcfgd); }
#define mtsdram(reg, data) do { mtdcr(memcfga,reg);mtdcr(memcfgd,data); } while (0)
#define mfsdram(reg, data) do { mtdcr(memcfga,reg);data = mfdcr(memcfgd); } while (0)
/*
* Macros for accessing the indirect clocking controller registers
*/
#define mtclk(reg, data) { mtdcr(clkcfga,reg);mtdcr(clkcfgd,data); }
#define mfclk(reg, data) { mtdcr(clkcfga,reg);data = mfdcr(clkcfgd); }
#define mtclk(reg, data) do { mtdcr(clkcfga,reg);mtdcr(clkcfgd,data); } while (0)
#define mfclk(reg, data) do { mtdcr(clkcfga,reg);data = mfdcr(clkcfgd); } while (0)
/*
* Macros for accessing the sdr controller registers
*/
#define mtsdr(reg, data) { mtdcr(sdrcfga,reg);mtdcr(sdrcfgd,data); }
#define mfsdr(reg, data) { mtdcr(sdrcfga,reg);data = mfdcr(sdrcfgd); }
#define mtsdr(reg, data) do { mtdcr(sdrcfga,reg);mtdcr(sdrcfgd,data); } while (0)
#define mfsdr(reg, data) do { mtdcr(sdrcfga,reg);data = mfdcr(sdrcfgd); } while (0)
#ifndef __ASSEMBLY__

6
nand_spl/board/amcc/sequoia/Makefile
View File

@ -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