docs: Improve documentation of Zynq and MicroBlaze boot flows

* Add BOOT.jtag to cover booting u-boot for Zynq and MicroBlaze
* Add BOOT.tftp to cover booting the kernel for Zynq and MicroBlaze
* Add BOOT.sdcard to cover booting Zynq (using BOOT.BIN)

Signed-off-by: Nathan Rossi <nathan.rossi@xilinx.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/docs/BOOT.jtag b/docs/BOOT.jtag
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+
+Loading U-Boot via JTAG
+=======================
+
+Note: This boot flow requires access to Xilinx tools (for JTAG programming).
+
+Download the bitstream for the target machine using JTAG (The pre-built
+bitstream provided in the reference design files should be used).
+
+(MicroBlaze) Download the 'u-boot.elf' to the target CPU via the use of XMD.
+        $ xmd
+        XMD% connect mb mdm
+        XMD% rst
+        XMD% dow u-boot.elf
+        XMD% con
+
+(Zynq) Download the 'u-boot.elf' to the target CPU via the use of XMD.
+(Note: Ensure to have the boot mode pins/switches configured in JTAG mode)
+        $ xmd
+        XMD% connect arm hw
+        XMD% rst
+        XMD% dow zynq_fsbl_0.elf
+        XMD% con; sleep 1; stop
+        XMD% dow u-boot.elf
+        XMD% con
+
+U-Boot will load and the console will be avaliable on the UART interface.
+        ...
+        Hit any key to stop autoboot: 0
+        U-Boot>