[PATCH v2 3/3] docs/system/arm: Add a doc for zynq board

[Sai Pavan Boddu]

Added the supported device list and an example command.

Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@amd.com>
---
 docs/system/arm/xlnx-zynq.rst | 47 +++++++++++++++++++++++++++++++++++
 docs/system/target-arm.rst    |  1 +
 2 files changed, 48 insertions(+)
 create mode 100644 docs/system/arm/xlnx-zynq.rst

diff --git a/docs/system/arm/xlnx-zynq.rst b/docs/system/arm/xlnx-zynq.rst
new file mode 100644
index 00000000000..419cc1aec8b
--- /dev/null
+++ b/docs/system/arm/xlnx-zynq.rst
@@ -0,0 +1,47 @@
+Xilinx Zynq board (``xilinx-zynq-a9``)
+======================================
+The Zynq 7000 family is based on the AMD SoC architecture. These products
+integrate a feature-rich dual or single-core Arm Cortex-A9 MPCore based
+processing system (PS) and AMD programmable logic (PL) in a single device.
+
+More details here:
+https://docs.amd.com/r/en-US/ug585-zynq-7000-SoC-TRM/Zynq-7000-SoC-Technical-Reference-Manual
+
+QEMU xilinx-zynq-a9 board supports following devices:
+    - A9 MPCORE
+        - cortex-a9
+        - GIC v1
+        - Generic timer
+        - wdt
+    - OCM 256KB
+    - SMC SRAM@0xe2000000 64MB
+    - Zynq SLCR
+    - SPI x2
+    - QSPI
+    - UART
+    - TTC x2
+    - Gigabit Ethernet Controller x2
+    - SD Controller x2
+    - XADC
+    - Arm PrimeCell DMA Controller
+    - DDR Memory
+    - USB 2.0 x2
+
+Running
+"""""""
+Direct Linux boot of a generic ARM upstream Linux kernel:
+
+.. code-block:: bash
+
+  $ qemu-system-aarch64 -M xilinx-zynq-a9 \
+        -dtb zynq-zc702.dtb  -serial null -serial mon:stdio \
+        -display none  -m 1024 \
+        -initrd rootfs.cpio.gz -kernel zImage
+
+For configuring the boot-mode provide the following on the command line:
+
+.. code-block:: bash
+
+   -machine boot-mode=qspi
+
+Supported values are JTAG, SD, QSPI, NOR.
diff --git a/docs/system/target-arm.rst b/docs/system/target-arm.rst
index 870d30e3502..7b992722846 100644
--- a/docs/system/target-arm.rst
+++ b/docs/system/target-arm.rst
@@ -109,6 +109,7 @@ undocumented; you can get a complete list by running
    arm/virt
    arm/xenpvh
    arm/xlnx-versal-virt
+   arm/xlnx-zynq
 
 Emulated CPU architecture support
 =================================
-- 
2.34.1