[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>

1 files changed, 8 insertions, 8 deletions

diff --git a/include/ppc440.h b/include/ppc440.h
index 1c7f11c488..25e338fb10 100644
--- a/include/ppc440.h
+++ b/include/ppc440.h
@@ -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__