mpc8569mds: fix consuming long time while relocating code.

The original code maps boot flash as non-cacheable region. When calling
relocate_code in flash to copy u-boot from flash to ddr, every loop copy command
is read from flash. The flash read speed will be the bottleneck, which consuming
long time to do this operation. To resovle this, map the boot flash as
write-through cache via tlb. And set tlb to remap the flash after code
executing in ddr, to confirm flash erase operation properly done.

Signed-off-by: Kai.Jiang <Kai.Jiang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

board/freescale/mpc8569mds/mpc8569mds.c

@@ -27,6 +27,7 @@
 #include <pci.h>
 #include <asm/processor.h>
 #include <asm/mmu.h>
+#include <asm/cache.h>
 #include <asm/immap_85xx.h>
 #include <asm/fsl_pci.h>
 #include <asm/fsl_ddr_sdram.h>
@@ -211,6 +212,31 @@ int board_early_init_f (void)
 	return 0;
 }
 
+int board_early_init_r(void)
+{
+	const unsigned int flashbase = CONFIG_SYS_NAND_BASE;
+	const u8 flash_esel = 0;
+
+	/*
+	 * Remap Boot flash to caching-inhibited
+	 * so that flash can be erased properly.
+	 */
+
+	/* Flush d-cache and invalidate i-cache of any FLASH data */
+	flush_dcache();
+	invalidate_icache();
+
+	/* invalidate existing TLB entry for flash */
+	disable_tlb(flash_esel);
+
+	set_tlb(1, flashbase, CONFIG_SYS_NAND_BASE,	/* tlb, epn, rpn */
+		MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,	/* perms, wimge */
+		0, flash_esel,				/* ts, esel */
+		BOOKE_PAGESZ_64M, 1);			/* tsize, iprot */
+
+	return 0;
+}
+
 int checkboard (void)
 {
 	printf ("Board: 8569 MDS\n");

board/freescale/mpc8569mds/tlb.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2009 Freescale Semiconductor, Inc.
+ * Copyright 2009-2010 Freescale Semiconductor, Inc.
  *
  * (C) Copyright 2000
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -46,15 +46,20 @@ struct fsl_e_tlb_entry tlb_table[] = {
 
 	/* TLB 1 Initializations */
 	/*
-	 * TLBe 0:	64M	Non-cacheable, guarded
+	 * TLBe 0:	64M	write-through, guarded
 	 * Out of reset this entry is only 4K.
-	 * 0xfc000000	256K	NAND FLASH (CS3)
-	 * 0xfe000000	32M	NOR FLASH (CS0)
+	 * 0xfc000000	32MB	NAND FLASH (CS3)
+	 * 0xfe000000	32MB	NOR FLASH (CS0)
 	 */
+#ifdef CONFIG_NAND_SPL
 	SET_TLB_ENTRY(1, CONFIG_SYS_NAND_BASE, CONFIG_SYS_NAND_BASE,
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+		      0, 0, BOOKE_PAGESZ_1M, 1),
+#else
+	SET_TLB_ENTRY(1, CONFIG_SYS_NAND_BASE, CONFIG_SYS_NAND_BASE,
+		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_W|MAS2_G,
 		      0, 0, BOOKE_PAGESZ_64M, 1),
-
+#endif
 	/*
 	 * TLBe 1:	256KB	Non-cacheable, guarded
 	 * 0xf8000000	32K	BCSR

include/configs/MPC8569MDS.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 Freescale Semiconductor, Inc.
+ * Copyright (C) 2009-2010 Freescale Semiconductor, Inc.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -74,6 +74,7 @@ extern unsigned long get_clock_freq(void);
 #define CONFIG_ENABLE_36BIT_PHYS	1
 
 #define CONFIG_BOARD_EARLY_INIT_F	1	/* Call board_pre_init */
+#define CONFIG_BOARD_EARLY_INIT_R	1
 #define CONFIG_HWCONFIG
 
 #define CONFIG_SYS_MEMTEST_START	0x00200000	/* memtest works on */