doc: board: ti: am64x: document OSPI layout

Added OSPI flash layout diagram, as well as example commands to flash
firmware to it.

Signed-off-by: Jonathan Humphreys <j-humphreys@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

2 files changed, 826 insertions, 0 deletions

diff --git a/doc/board/ti/am64x_evm.rst b/doc/board/ti/am64x_evm.rst
index 6ae35b3..88997b6 100644
--- a/doc/board/ti/am64x_evm.rst
+++ b/doc/board/ti/am64x_evm.rst
@@ -140,6 +140,30 @@ Image formats:
 .. image:: img/nodm_tispl.bin.svg
   :alt: tispl.bin image format
 
+OSPI:
+-----
+ROM supports booting from OSPI from offset 0x0.
+
+Flashing images to OSPI:
+
+Below commands can be used to download tiboot3.bin, tispl.bin, and u-boot.img,
+over tftp and then flash those to OSPI at their respective addresses.
+
+.. prompt:: bash =>
+
+  sf probe
+  tftp ${loadaddr} tiboot3.bin
+  sf update $loadaddr 0x0 $filesize
+  tftp ${loadaddr} tispl.bin
+  sf update $loadaddr 0x100000 $filesize
+  tftp ${loadaddr} u-boot.img
+  sf update $loadaddr 0x300000 $filesize
+
+Flash layout for OSPI:
+
+.. image:: img/ospi_sysfw-am64.svg
+  :alt: OSPI flash partition layout
+
 Switch Setting for Boot Mode
 ----------------------------
 
diff --git a/doc/board/ti/img/ospi_sysfw-am64.svg b/doc/board/ti/img/ospi_sysfw-am64.svg
new file mode 100644
index 0000000..f6244dc
--- /dev/null
+++ b/doc/board/ti/img/ospi_sysfw-am64.svg
@@ -0,0 +1,802 @@
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