diff --git a/board/tqm8xx/tqm8xx.c b/board/tqm8xx/tqm8xx.c
index 6b206f8..cebdcc0 100644
--- a/board/tqm8xx/tqm8xx.c
+++ b/board/tqm8xx/tqm8xx.c
@@ -354,6 +354,8 @@
 	udelay (10000);
 
 #ifdef	CONFIG_CAN_DRIVER
+	/* UPM initialization for CAN @ CLKOUT <= 66 MHz */
+
 	/* Initialize OR3 / BR3 */
 	memctl->memc_or3 = CFG_OR3_CAN;
 	memctl->memc_br3 = CFG_BR3_CAN;
@@ -362,7 +364,7 @@
 	memctl->memc_mbmr = MBMR_GPL_B4DIS;	/* GPL_B4 ouput line Disable */
 
 	/* Initialize UPMB for CAN: single read */
-	memctl->memc_mdr = 0xFFFFC004;
+	memctl->memc_mdr = 0xFFFFCC04;
 	memctl->memc_mcr = 0x0100 | UPMB;
 
 	memctl->memc_mdr = 0x0FFFD004;
@@ -374,23 +376,23 @@
 	memctl->memc_mdr = 0x3FFFC004;
 	memctl->memc_mcr = 0x0103 | UPMB;
 
-	memctl->memc_mdr = 0xFFFFDC05;
+	memctl->memc_mdr = 0xFFFFDC07;
 	memctl->memc_mcr = 0x0104 | UPMB;
 
 	/* Initialize UPMB for CAN: single write */
-	memctl->memc_mdr = 0xFFFCC004;
+	memctl->memc_mdr = 0xFFFCCC04;
 	memctl->memc_mcr = 0x0118 | UPMB;
 
-	memctl->memc_mdr = 0xCFFCD004;
+	memctl->memc_mdr = 0xCFFCDC04;
 	memctl->memc_mcr = 0x0119 | UPMB;
 
-	memctl->memc_mdr = 0x0FFCC000;
+	memctl->memc_mdr = 0x3FFCC000;
 	memctl->memc_mcr = 0x011A | UPMB;
 
-	memctl->memc_mdr = 0x7FFCC004;
+	memctl->memc_mdr = 0xFFFCC004;
 	memctl->memc_mcr = 0x011B | UPMB;
 
-	memctl->memc_mdr = 0xFFFDCC05;
+	memctl->memc_mdr = 0xFFFDC405;
 	memctl->memc_mcr = 0x011C | UPMB;
 #endif							/* CONFIG_CAN_DRIVER */
 
diff --git a/include/configs/TQM860M.h b/include/configs/TQM860M.h
index 684b86f..fe3a2f0 100644
--- a/include/configs/TQM860M.h
+++ b/include/configs/TQM860M.h
@@ -69,9 +69,14 @@
 	"net_nfs=tftp 200000 ${bootfile};run nfsargs addip;bootm\0"	\
 	"rootpath=/opt/eldk/ppc_8xx\0"					\
 	"bootfile=/tftpboot/TQM860M/uImage\0"				\
-	"fdt_addr=40080000\0"						\
-	"kernel_addr=400A0000\0"					\
+	"fdt_addr=400C0000\0"						\
+	"kernel_addr=40100000\0"					\
 	"ramdisk_addr=40280000\0"					\
+	"load=tftp 200000 ${u-boot}\0"					\
+	"update=protect off 40000000 +${filesize};"			\
+		"erase 40000000 +${filesize};"				\
+		"cp.b 200000 40000000 ${filesize};"			\
+		"protect on 40000000 +${filesize}\0"			\
 	""
 #define CONFIG_BOOTCOMMAND	"run flash_self"
 
@@ -172,7 +177,7 @@
 #define CFG_FLASH_BASE		0x40000000
 #define	CFG_MONITOR_LEN		(256 << 10)	/* Reserve 256 kB for Monitor	*/
 #define CFG_MONITOR_BASE	CFG_FLASH_BASE
-#define	CFG_MALLOC_LEN		(128 << 10)	/* Reserve 128 kB for malloc()	*/
+#define	CFG_MALLOC_LEN		(256 << 10)	/* Reserve 256 kB for malloc()	*/
 
 /*
  * For booting Linux, the board info and command line data
@@ -193,7 +198,7 @@
 #define	CFG_ENV_IS_IN_FLASH	1
 #define	CFG_ENV_OFFSET		0x40000	/*   Offset   of Environment Sector	*/
 #define	CFG_ENV_SIZE		0x08000	/* Total Size of Environment Sector	*/
-#define	CFG_ENV_SECT_SIZE	0x20000	/* Total Size of Environment Sector	*/
+#define	CFG_ENV_SECT_SIZE	0x40000	/* Total Size of Environment Sector	*/
 
 /* Address and size of Redundant Environment Sector	*/
 #define CFG_ENV_OFFSET_REDUND	(CFG_ENV_OFFSET+CFG_ENV_SECT_SIZE)
diff --git a/include/configs/TQM866M.h b/include/configs/TQM866M.h
index 0d77891..ca3c166 100644
--- a/include/configs/TQM866M.h
+++ b/include/configs/TQM866M.h
@@ -81,9 +81,14 @@
 	"net_nfs=tftp 200000 ${bootfile};run nfsargs addip;bootm\0"	\
 	"rootpath=/opt/eldk/ppc_8xx\0"					\
 	"bootfile=/tftpboot/TQM866M/uImage\0"				\
-	"fdt_addr=40080000\0"						\
-	"kernel_addr=400A0000\0"					\
+	"fdt_addr=400C0000\0"						\
+	"kernel_addr=40100000\0"					\
 	"ramdisk_addr=40280000\0"					\
+	"load=tftp 200000 ${u-boot}\0"					\
+	"update=protect off 40000000 +${filesize};"			\
+		"erase 40000000 +${filesize};"				\
+		"cp.b 200000 40000000 ${filesize};"			\
+		"protect on 40000000 +${filesize}\0"			\
 	""
 #define CONFIG_BOOTCOMMAND	"run flash_self"
 
@@ -215,7 +220,7 @@
 #define CFG_FLASH_BASE		0x40000000
 #define CFG_MONITOR_LEN		(256 << 10)	/* Reserve 256 kB for Monitor	*/
 #define CFG_MONITOR_BASE	CFG_FLASH_BASE
-#define CFG_MALLOC_LEN		(128 << 10)	/* Reserve 128 kB for malloc()	*/
+#define CFG_MALLOC_LEN		(256 << 10)	/* Reserve 256 kB for malloc()	*/
 
 /*
  * For booting Linux, the board info and command line data
@@ -236,7 +241,7 @@
 #define CFG_ENV_IS_IN_FLASH	1
 #define CFG_ENV_OFFSET		0x40000 /*   Offset   of Environment Sector	*/
 #define CFG_ENV_SIZE		0x08000 /* Total Size of Environment Sector	*/
-#define CFG_ENV_SECT_SIZE	0x20000 /* Total Size of Environment Sector	*/
+#define CFG_ENV_SECT_SIZE	0x40000 /* Total Size of Environment Sector	*/
 
 /* Address and size of Redundant Environment Sector	*/
 #define CFG_ENV_OFFSET_REDUND	(CFG_ENV_OFFSET+CFG_ENV_SECT_SIZE)
@@ -421,26 +426,30 @@
 #define CFG_PTA_PER_CLK	((4096 * 64 * 1000) / (4 * 64))
 
 /*
- * Memory Periodic Timer Prescaler
- * Periodic timer for refresh, start with refresh rate for 40 MHz clock
- * (CFG_8xx_CPUCLK_MIN / CFG_PTA_PER_CLK)
+ * Periodic timer (MAMR[PTx]) for 4 * 7.8 us refresh (= 31.2 us per quad)
+ *
+ *                        CPUclock(MHz) * 31.2
+ * CFG_MAMR_PTA = -----------------------------------     with DFBRG = 0
+ *                2^(2*SCCR[DFBRG]) * MPTPR_PTP_DIV16
+ *
+ * CPU clock =  15 MHz:  CFG_MAMR_PTA =  29   ->  4 * 7.73 us
+ * CPU clock =  50 MHz:  CFG_MAMR_PTA =  97   ->  4 * 7.76 us
+ * CPU clock =  66 MHz:  CFG_MAMR_PTA = 128   ->  4 * 7.75 us
+ * CPU clock = 133 MHz:  CFG_MAMR_PTA = 255   ->  4 * 7.67 us
+ *
+ * Value 97 is for 4 * 7.8 us at 50 MHz. So the refresh cycle requirement will
+ * be met also in the default configuration, i.e. if environment variable
+ * 'cpuclk' is not set.
  */
-#define CFG_MAMR_PTA		39
+#define CFG_MAMR_PTA		97
 
 /*
- * For 16 MBit, refresh rates could be 31.3 us
- * (= 64 ms / 2K = 125 / quad bursts).
- * For a simpler initialization, 15.6 us is used instead.
- *
- * #define CFG_MPTPR_2BK_2K	MPTPR_PTP_DIV32		for 2 banks
- * #define CFG_MPTPR_1BK_2K	MPTPR_PTP_DIV64		for 1 bank
+ * Memory Periodic Timer Prescaler Register (MPTPR) values.
  */
-#define CFG_MPTPR_2BK_4K	MPTPR_PTP_DIV16		/* setting for 2 banks	*/
-#define CFG_MPTPR_1BK_4K	MPTPR_PTP_DIV32		/* setting for 1 bank	*/
-
-/* refresh rate 7.8 us (= 64 ms / 8K = 31.2 / quad bursts) for 256 MBit		*/
-#define CFG_MPTPR_2BK_8K	MPTPR_PTP_DIV8		/* setting for 2 banks	*/
-#define CFG_MPTPR_1BK_8K	MPTPR_PTP_DIV16		/* setting for 1 bank	*/
+/* 4 * 7.8 us refresh (= 31.2 us per quad) at 50 MHz and PTA = 97 */
+#define CFG_MPTPR_2BK_4K	MPTPR_PTP_DIV16
+/* 4 * 3.9 us refresh (= 15.6 us per quad) at 50 MHz and PTA = 97 */
+#define CFG_MPTPR_2BK_8K	MPTPR_PTP_DIV8
 
 /*
  * MAMR settings for SDRAM