summaryrefslogtreecommitdiff
path: root/doc
diff options
context:
space:
mode:
authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-11-24 20:12:12 +0300
committerKim Phillips <kim.phillips@freescale.com>2010-01-07 18:33:52 -0600
commit2e95004deb6e33e33bf1b8a92a38cd2115bac4c2 (patch)
treef36761ada7fdf6663643aba5fdab3411409d2f5e /doc
parent6ca9da4d42aeb43df5ef29f7d0518009df583b2f (diff)
downloadu-boot-imx-2e95004deb6e33e33bf1b8a92a38cd2115bac4c2.zip
u-boot-imx-2e95004deb6e33e33bf1b8a92a38cd2115bac4c2.tar.gz
u-boot-imx-2e95004deb6e33e33bf1b8a92a38cd2115bac4c2.tar.bz2
mpc83xx: Add NAND boot support for MPC8315E-RDB boards
The core support for NAND booting is there already, so this patch is pretty straightforward. There is one trick though: top level Makefile expects nand_spl to be in nand_spl/board/$(BOARDDIR), but we can fully reuse the code from mpc8313erdb boards, and so to not duplicate the code we just symlink nand_spl/board/freescale/mpc8315erdb to mpc8313erdb. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> o silence make during ln echo o update documentation o and avoid: $ ./MAKEALL MPC8315ERDB_NAND Configuring for MPC8315ERDB board... sdram.o: In function `fixed_sdram': /home/r1aaha/git/u-boot/nand_spl/board/freescale/mpc8313erdb/sdram.c:72: undefined reference to `udelay' by renaming udelay -> __udelay in the spirit of commit 3eb90bad651fab39cffba750ec4421a9c01d60e7 "Generic udelay() with watchdog support". Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Diffstat (limited to 'doc')
-rw-r--r--doc/README.mpc8315erdb29
1 files changed, 27 insertions, 2 deletions
diff --git a/doc/README.mpc8315erdb b/doc/README.mpc8315erdb
index 7d476d0..b32132d 100644
--- a/doc/README.mpc8315erdb
+++ b/doc/README.mpc8315erdb
@@ -15,6 +15,18 @@ Freescale MPC8315ERDB Board
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:
@@ -26,6 +38,9 @@ Freescale MPC8315ERDB Board
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:
@@ -43,13 +58,15 @@ Freescale MPC8315ERDB Board
export CROSS_COMPILE=your-cross-compiler-prefix-
make distclean
- make MPC8315ERDB_config
+ 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
@@ -60,6 +77,15 @@ Freescale MPC8315ERDB Board
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
@@ -76,5 +102,4 @@ Freescale MPC8315ERDB Board
6 Notes
- Booting from NAND flash is not yet supported.
The console baudrate for MPC8315ERDB is 115200bps.