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| author | Wolfgang Denk <wd@denx.de> | 2012-04-29 23:57:39 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2012-07-29 15:42:02 +0200 |
| commit | 702e6014f15b307f144fa03ecaf83a8446c6802a (patch) | |
| tree | 8c9360248c257f52c1487d9e6cbba3f2dc38e294 /board/st/nhk8815 | |
| parent | 631fea8f2d70aa5eb7c49b33039971dfc61bba88 (diff) | |
| download | u-boot-imx-702e6014f15b307f144fa03ecaf83a8446c6802a.zip u-boot-imx-702e6014f15b307f144fa03ecaf83a8446c6802a.tar.gz u-boot-imx-702e6014f15b307f144fa03ecaf83a8446c6802a.tar.bz2 | |
doc: cleanup - move board READMEs into respective board directories
Also drop a few files referring to no longer / not yet supported
boards.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Kim Phillips <kim.phillips@freescale.com>
Cc: Andy Fleming <afleming@gmail.com>
Cc: Jason Jin <jason.jin@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Acked-by: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
Diffstat (limited to 'board/st/nhk8815')
| -rw-r--r-- | board/st/nhk8815/README.nhk8815 | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/board/st/nhk8815/README.nhk8815 b/board/st/nhk8815/README.nhk8815 new file mode 100644 index 0000000..9008e39 --- /dev/null +++ b/board/st/nhk8815/README.nhk8815 @@ -0,0 +1,32 @@ + +The Nomadik 8815 CPU has a "secure" boot mode where no external access +(not even JTAG) is allowed. The "remap" bits in the evaluation board +are configured in order to boot from the internal ROM memory (in +secure mode). + +The boot process as defined by the manufacturer executes external code +(loaded from NAND or OneNAND) that that disables such "security" in +order to run u-boot and later the kernel without constraints. Such +code is a proprietary initial boot loader, called "X-Loader" (in case +anyone wonders, it has no relations with other loaders with the same +name and there is no GPL code inside the ST X-Loader). + +SDRAM configuration, PLL setup and initial loading from NAND is +implemented in the X-Loader, so U-Boot is already running in SDRAM +when control is handed over to it. + +The Makefile offers two different configurations to be used if you +boot from Nand or OneNand. + + make nhk8815_config + make nhk8815_onenand_config + +Both support OneNand and Nand. Since U-Boot, running in RAM, can't know +where it was loaded from, the configurations differ in where the filesystem +is looked for by default. + + +On www.st.com/nomadik and on www.stnwireless.com there are documents, +summary data and white papers on Nomadik. The full datasheet for +STn8815 is not currently available on line but under specific request +to the local ST sales offices. |