powerpc:mpc85xx: Add ifc nand boot support for TPL/SPL

Using the TPL method for nand boot by sram was already
supported. Here add some code for mpc85xx ifc nand boot.

	- For ifc, elbc, esdhc, espi, all need the SPL without
	section .resetvec.
	- Use a clear function name for nand spl boot.
	- Add CONFIG_SPL_DRIVERS_MISC_SUPPORT to compile the fsl_ifc.c
	in spl/Makefile;

Signed-off-by: Po Liu <Po.Liu@freescale.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

arch/powerpc/cpu/mpc85xx/u-boot-spl.lds

@@ -57,7 +57,14 @@ SECTIONS
 	. = ALIGN(8);
 	__init_begin = .;
 	__init_end = .;
-/* FIXME for non-NAND SPL */
+
+/* For ifc, elbc, esdhc, espi, all need the SPL without section .resetvec */
+#ifdef CONFIG_SYS_MPC85XX_NO_RESETVEC
+	.bootpg ADDR(.text) - 0x1000 :
+	{
+		KEEP(*(.bootpg))
+	} :text = 0xffff
+#else
 #if defined(CONFIG_FSL_IFC) /* Restrict bootpg at 4K boundry for IFC */
 	.bootpg ADDR(.text) + 0x1000 :
 	{
@@ -69,12 +76,6 @@ SECTIONS
 #else
 #error unknown NAND controller
 #endif
-#ifdef CONFIG_SYS_MPC85XX_NO_RESETVEC
-	.bootpg ADDR(.text) - 0x1000 :
-	{
-		KEEP(*(.bootpg))
-	} :text = 0xffff
-#else
 	.resetvec ADDR(.text) + RESET_VECTOR_OFFSET : {
 		KEEP(*(.resetvec))
 	} = 0xffff

doc/README.SPL

@@ -62,6 +62,7 @@ CONFIG_SPL_FAT_SUPPORT (fs/fat/libfat.o)
 CONFIG_SPL_LIBGENERIC_SUPPORT (lib/libgeneric.o)
 CONFIG_SPL_POWER_SUPPORT (drivers/power/libpower.o)
 CONFIG_SPL_NAND_SUPPORT (drivers/mtd/nand/libnand.o)
+CONFIG_SPL_DRIVERS_MISC_SUPPORT (drivers/misc)
 CONFIG_SPL_DMA_SUPPORT (drivers/dma/libdma.o)
 CONFIG_SPL_POST_MEM_SUPPORT (post/drivers/memory.o)
 CONFIG_SPL_NAND_LOAD (drivers/mtd/nand/nand_spl_load.o)

drivers/mtd/nand/fsl_ifc_spl.c

@@ -88,7 +88,11 @@ static inline int bad_block(uchar *marker, int port_size)
 		return __raw_readw((u16 *)marker) != 0xffff;
 }
 
-static void nand_load(unsigned int offs, int uboot_size, uchar *dst)
+#ifdef CONFIG_TPL_BUILD
+int nand_spl_load_image(uint32_t offs, unsigned int uboot_size, void *vdst)
+#else
+static int nand_load(uint32_t offs, unsigned int uboot_size, void *vdst)
+#endif
 {
 	struct fsl_ifc *ifc = IFC_BASE_ADDR;
 	uchar *buf = (uchar *)CONFIG_SYS_NAND_BASE;
@@ -105,6 +109,7 @@ static void nand_load(unsigned int offs, int uboot_size, uchar *dst)
 
 	int sram_addr;
 	int pg_no;
+	uchar *dst = vdst;
 
 	/* Get NAND Flash configuration */
 	csor = CONFIG_SYS_NAND_CSOR;
@@ -208,8 +213,19 @@ static void nand_load(unsigned int offs, int uboot_size, uchar *dst)
 			offs += page_size;
 		} while ((offs & (blk_size - 1)) && (pos < uboot_size));
 	}
+
+	return 0;
 }
 
+/*
+ * Defines a static function nand_load_image() here, because non-static makes
+ * the code too large for certain SPLs(minimal SPL, maximum size <= 4Kbytes)
+ */
+#ifndef CONFIG_TPL_BUILD
+#define nand_spl_load_image(offs, uboot_size, vdst) \
+	nand_load(offs, uboot_size, vdst)
+#endif
+
 /*
  * Main entrypoint for NAND Boot. It's necessary that SDRAM is already
  * configured and available since this code loads the main U-boot image
@@ -221,16 +237,17 @@ void nand_boot(void)
 	/*
 	 * Load U-Boot image from NAND into RAM
 	 */
-	nand_load(CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE,
+	nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
-		  (uchar *)CONFIG_SYS_NAND_U_BOOT_DST);
+			    CONFIG_SYS_NAND_U_BOOT_SIZE,
+			    (uchar *)CONFIG_SYS_NAND_U_BOOT_DST);
 
 #ifdef CONFIG_NAND_ENV_DST
-	nand_load(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
+	nand_spl_load_image(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
-		  (uchar *)CONFIG_NAND_ENV_DST);
+			    (uchar *)CONFIG_NAND_ENV_DST);
 
 #ifdef CONFIG_ENV_OFFSET_REDUND
-	nand_load(CONFIG_ENV_OFFSET_REDUND, CONFIG_ENV_SIZE,
+	nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, CONFIG_ENV_SIZE,
-		  (uchar *)CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE);
+			    (uchar *)CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE);
 #endif
 #endif
 	/*

spl/Makefile

@@ -72,6 +72,7 @@ LIBS-$(CONFIG_SPL_LIBGENERIC_SUPPORT) += lib/
 LIBS-$(CONFIG_SPL_POWER_SUPPORT) += drivers/power/ \
 	drivers/power/pmic/
 LIBS-$(if $(CONFIG_CMD_NAND),$(CONFIG_SPL_NAND_SUPPORT)) += drivers/mtd/nand/
+LIBS-$(CONFIG_SPL_DRIVERS_MISC_SUPPORT) += drivers/misc/
 LIBS-$(CONFIG_SPL_ONENAND_SUPPORT) += drivers/mtd/onenand/
 LIBS-$(CONFIG_SPL_DMA_SUPPORT) += drivers/dma/
 LIBS-$(CONFIG_SPL_POST_MEM_SUPPORT) += post/drivers/