u-boot

History

Simon Glass e895a4b06f fdt: Allow ft_board_setup() to report failure This function can fail if the device tree runs out of space. Rather than silently booting with an incomplete device tree, allow the failure to be detected. Unfortunately this involves changing a lot of places in the code. I have not changed behvaiour to return an error where one is not currently returned, to avoid unexpected breakage. Eventually it would be nice to allow boards to register functions to be called to update the device tree. This would avoid all the many functions to do this. However it's not clear yet if this should be done using driver model or with a linker list. This work is left for later. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Anatolij Gustschin <agust@denx.de>		2014-11-21 04:43:15 +01:00
..
Kconfig	kconfig: remove redundant "string" type in arch and board Kconfigs	2014-09-13 16:43:55 -04:00
MAINTAINERS	Add board MAINTAINERS files	2014-07-30 08:48:06 -04:00
Makefile	board: powerpc: convert makefiles to Kbuild style	2013-11-01 11:42:12 -04:00
mpc8315erdb.c	fdt: Allow ft_board_setup() to report failure	2014-11-21 04:43:15 +01:00
README	doc: cleanup - move board READMEs into respective board directories	2012-07-29 15:42:02 +02:00
sdram.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00

README

Freescale MPC8315ERDB Board
-----------------------------------------

1.	Board Switches and Jumpers

	S3 is used to set CONFIG_SYS_RESET_SOURCE.

	To boot the image at 0xFE000000 in NOR flash, use these DIP
	switch settings for S3 S4:

	+------+	+------+
	|      |	| **** |
	| **** |	|      |
	+------+ ON	+------+ ON
	  4321		  4321
	(where the '*' indicates the position of the tab of the switch.)

	To boot the image at the beginning of NAND flash, use these
	DIP switch settings for S3 S4:

	+------+	+------+
	| *    |	|  *** |
	|  *** |	| *    |
	+------+ ON	+------+ ON
	  4321		  4321
	(where the '*' indicates the position of the tab of the switch.)

	When booting from NAND, use u-boot-nand.bin, not u-boot.bin.

2.	Memory Map
	The memory map looks like this:

	0x0000_0000	0x07ff_ffff	DDR		 128M
	0x8000_0000	0x8fff_ffff	PCI MEM		 256M
	0x9000_0000	0x9fff_ffff	PCI_MMIO	 256M
	0xe000_0000	0xe00f_ffff	IMMR		 1M
	0xe030_0000	0xe03f_ffff	PCI IO		 1M
	0xe060_0000	0xe060_7fff	NAND FLASH (CS1) 32K
	0xfe00_0000	0xfe7f_ffff	NOR FLASH (CS0)	 8M

	When booting from NAND, NAND flash is CS0 and NOR flash
	is CS1.

3.	Definitions

3.1	Explanation of NEW definitions in:

	include/configs/MPC8315ERDB.h

	CONFIG_MPC83xx		MPC83xx family
	CONFIG_MPC831x		MPC831x specific
	CONFIG_MPC8315		MPC8315 specific
	CONFIG_MPC8315ERDB	MPC8315ERDB board specific

4.	Compilation

	Assuming you're using BASH (or similar) as your shell:

	export CROSS_COMPILE=your-cross-compiler-prefix-
	make distclean
	make MPC8315ERDB_config (or MPC8315ERDB_NAND_config for u-boot-nand.bin)
	make all

5.	Downloading and Flashing Images

5.1	Reflash U-boot Image using U-boot

	NOR flash:

	tftp 40000 u-boot.bin
	protect off all
	erase fe000000 fe1fffff

	cp.b 40000 fe000000 xxxx
	protect on all

	You have to supply the correct byte count with 'xxxx'
	from the TFTP result log.

	NAND flash:

	=>tftpboot $loadaddr <filename>
	=>nand erase 0 0x80000
	=>nand write $loadaddr 0 0x80000

	...where 0x80000 is the filesize rounded up to
	the next 0x20000 increment.

5.2	Downloading and Booting Linux Kernel

	Ensure that all networking-related environment variables are set
	properly (including ipaddr, serverip, gatewayip (if needed),
	netmask, ethaddr, eth1addr, rootpath (if using NFS root),
	fdtfile, and bootfile).

	Then, do one of the following, depending on whether you
	want an NFS root or a ramdisk root:

	=>run nfsboot
	or
	=>run ramboot

6	Notes

	The console baudrate for MPC8315ERDB is 115200bps.