README.booting.versal.md: Update xen jtag boot instructions

Update xen jtag boot instruction using TFTP or XSDB tools.

Signed-off-by: Sandeep Gundlupet Raju <sandeep.gundlupet-raju@amd.com>
Signed-off-by: Mark Hatle <mark.hatle@amd.com>

1 files changed, 69 insertions, 13 deletions

diff --git a/docs/README.booting.versal.md b/docs/README.booting.versal.md
index ef817bf3..4f673689 100644
--- a/docs/README.booting.versal.md
+++ b/docs/README.booting.versal.md
@@ -57,6 +57,10 @@ Deploying the images can be done in two methods.
 
 #### Using devtool boot-jtag script
 
+> **Note:** For Xen boot flow boot-jtag script doesn't include loading xen, kernel
+> and root filesystem, This step needs to be done manually as mentioned in XSDB
+> or TFTP method below.
+
 1. Run devtool command to generate the boot-jtag.tcl script.
 ```
 $ devtool boot-jtag --help
@@ -125,6 +129,8 @@ Load the images into the target DDR/PL DRR load address i.e.,
 
 Below example uses base DDR address as 0x0 which matches in vivado address editor.
 
+1. **Linux**
+
 | Image Type         | Base DDR Address | Image Offset | Load Address in DDR |
 |--------------------|------------------|--------------|---------------------|
 | Kernel             | 0x0              | 0x200000     | 0x200000            |
@@ -132,6 +138,15 @@ Below example uses base DDR address as 0x0 which matches in vivado address edito
 | Rootfs             | 0x0              | 0x4000000    | 0x4000000           |
 | U-boot boot script | 0x0              | 0x20000000   | 0x20000000          |
 
+2. **Xen**
+
+| Image Type         | Base DDR Address | Image Offset | Load Address in DDR |
+|--------------------|------------------|--------------|---------------------|
+| Kernel             | 0x0              | 0xE00000     | 0xE00000            |
+| Device Tree        | 0x0              | 0xC000000    | 0xc000000           |
+| Rootfs             | 0x0              | 0x02600000   | 0x02600000          |
+| U-boot boot script | 0x0              | 0x20000000   | 0x20000000          |
+
 > **Note:** 
 > 1. `<target-image>` refers to core-image-minimal or petalinux-image-minimal
 > 2. For pxeboot boot create a symlink for `<target-image>-${MACHINE}-${DATETIME}.cpio.gz.u-boot`
@@ -152,13 +167,23 @@ xsdb% stop
 ```
 2. Using the `dow` command to load the images into the target DDR/PL DDR load 
    address.
-```
-xsdb% dow -data ${DEPLOY_DIR_IMAGE}/Image 0x200000
-xsdb% dow -data ${DEPLOY_DIR_IMAGE}/system.dtb 0x1000
-xsdb% dow -data ${DEPLOY_DIR_IMAGE}/core-image-minimal-${MACHINE}.cpio.gz.u-boot 0x4000000
-xsdb% dow -data ${DEPLOY_DIR_IMAGE}/boot.scr 0x20000000
-xsdb% targets -set -nocase -filter {name =~ "*A72*#0"}
-```
+
+   * Linux XSDB
+   ```
+   xsdb% targets -set -nocase -filter {name =~ "*A72*#0"}
+   xsdb% dow -data ${DEPLOY_DIR_IMAGE}/Image 0x200000
+   xsdb% dow -data ${DEPLOY_DIR_IMAGE}/system.dtb 0x1000
+   xsdb% dow -data ${DEPLOY_DIR_IMAGE}/core-image-minimal-${MACHINE}.cpio.gz.u-boot 0x4000000
+   xsdb% dow -data ${DEPLOY_DIR_IMAGE}/boot.scr 0x20000000
+   ```
+   * Xen XSDB
+   ```
+   xsdb% targets -set -nocase -filter {name =~ "*A72*#0"}
+   xsdb% dow -data ${DEPLOY_DIR_IMAGE}/Image 0xE00000
+   xsdb% dow -data ${DEPLOY_DIR_IMAGE}/system.dtb 0xc000000
+   xsdb% dow -data ${DEPLOY_DIR_IMAGE}/core-image-minimal-${MACHINE}.cpio.gz 0x02600000
+   xsdb% dow -data ${DEPLOY_DIR_IMAGE}/boot.scr 0x20000000
+   ```
 
 ###### Using TFTP
 
@@ -170,13 +195,25 @@ Versal> set serverip <server ip>
 Versal> set ipaddr <board ip>
 ```
 3. Load the images to DDR address.
-```
-U-Boot> tftpboot 0x200000 Image
-U-Boot> tftpboot 0x1000 system.dtb
-U-Boot> tftpboot 0x4000000 core-image-minimal-${MACHINE}.cpio.gz.u-boot
-U-Boot> tftpboot 0x20000000 boot.scr
 
-```
+   * Linux TFTP
+   ```
+   U-Boot> tftpboot 0x200000 Image
+   U-Boot> tftpboot 0x1000 system.dtb
+   U-Boot> tftpboot 0x4000000 core-image-minimal-${MACHINE}.cpio.gz.u-boot
+   U-Boot> tftpboot 0x20000000 boot.scr
+   ```
+
+   * Xen TFTP
+   ```
+   U-Boot> tftpboot 0xE00000 Image
+   U-Boot> setenv kernel_size 0x$filesize
+   U-Boot> tftpboot 0xc000000 system.dtb
+   U-Boot> tftpboot 0x02600000 core-image-minimal-${MACHINE}.cpio.gz
+   U-Boot> setenv ramdisk_size 0x$filesize
+   U-Boot> tftpboot 0x20000000 boot.scr
+   ```
+
 ##### Booting Linux
 
 Once the images are loaded continue the execution.
@@ -191,10 +228,29 @@ xsdb% con
 xsdb% exit
 ```
 3. In the target Serial Terminal, from U-Boot prompt run `boot` command.
+
+* Linux boot
 ```
 U-Boot> boot
 ```
 
+* XEN JTAG boot
+
+   * XSDB
+   > **Note:** You need to calculate the Kernel(kernel_size) and ramdisk(ramdisk_size)
+   > image size manually from `${DEPLOY_DIR_IMAGE}` directory. For example if your
+   > kernel size is 24269312 bytes you need to convert to hex 0x1725200 and use it.
+   ```
+   U-Boot> setenv kernel_size <filesize>
+   U-Boot> setenv ramdisk_size <filesize>
+   U-Boot> boot
+   ```
+
+   * TFTP
+   ```
+   U-Boot> boot
+   ```
+
 ## Booting from SD
 
 1. Load the SD card into the VCK190 board in the J302 SD slot.