1 files changed, 22 insertions, 0 deletions
diff --git a/doc/README.nhk8815 b/doc/README.nhk8815
new file mode 100644
index 0000000..453cfae
--- /dev/null
+++ b/doc/README.nhk8815
@@ -0,0 +1,22 @@
+
+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.
+
+
+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.