diff options
| author | Stefan Roese <sr@denx.de> | 2009-05-11 13:46:14 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2009-06-12 20:39:47 +0200 |
| commit | d873133f2ba9bd613d5f6552c31cc70fb13f15d3 (patch) | |
| tree | 01a00655040050e5125ef15a24e01e605eb02ec6 /include/configs/amcc-common.h | |
| parent | 837db3d87f4bfe9261629fb4a1bb433506a3056a (diff) | |
ppc4xx: Add Sequoia RAM-booting target
This patch adds another build target for the AMCC Sequoia PPC440EPx
eval board. This RAM-booting version is targeted for boards without
NOR FLASH (NAND booting) which need a possibility to initially
program their NAND FLASH. Using a JTAG debugger (e.g. BDI2000/3000)
configured to setup the SDRAM, this debugger can load this RAM-
booting image to the target address in SDRAM (in this case 0x1000000)
and start it there. Then U-Boot's standard NAND commands can be
used to program the NAND FLASH (e.g. "nand write ...").
Here the commands to load and start this image from the BDI2000:
440EPX>reset halt
440EPX>load 0x1000000 /tftpboot/sequoia/u-boot.bin
440EPX>go 0x1000000
Please note that this image automatically scans for an already
initialized SDRAM TLB (detected by EPN=0). This TLB will not be
cleared. This TLB doesn't need to be TLB #0, this RAM-booting
version will detect it and preserve it. So booting via BDI2000
will work and booting with a complete different TLB init via
U-Boot works as well.
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'include/configs/amcc-common.h')
| -rw-r--r-- | include/configs/amcc-common.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/configs/amcc-common.h b/include/configs/amcc-common.h index d3dc3e533..3b733c03e 100644 --- a/include/configs/amcc-common.h +++ b/include/configs/amcc-common.h @@ -76,6 +76,17 @@ #define CONFIG_CMD_PING #define CONFIG_CMD_REGINFO +#if defined(CONFIG_SYS_RAMBOOT) +/* + * Disable NOR FLASH commands on RAM-booting version. One main reason for this + * RAM-booting version is boards with NAND and without NOR. This image can + * be used for initial NAND programming. + */ +#define CONFIG_SYS_NO_FLASH +#undef CONFIG_CMD_FLASH +#undef CONFIG_CMD_IMLS +#endif + /* * Miscellaneous configurable options */ |