Signed-off-by: Jamin Lin <[email protected]>
---
docs/system/arm/aspeed.rst | 37 ++++++++++++++++++++++++++++++++++---
1 file changed, 34 insertions(+), 3 deletions(-)
diff --git a/docs/system/arm/aspeed.rst b/docs/system/arm/aspeed.rst
index d0054a7dbb..0f83189e67 100644
--- a/docs/system/arm/aspeed.rst
+++ b/docs/system/arm/aspeed.rst
@@ -389,18 +389,26 @@ Booting the ast2700fc machine
AST2700 features four Cortex-A35 primary processors and two Cortex-M4
coprocessors.
**ast2700-evb** machine focuses on emulating the four Cortex-A35 primary
processors,
**ast2700fc** machine extends **ast2700-evb** by adding support for the two
Cortex-M4 coprocessors.
+There are two methods to boot the ast2700fc machine.
+
+Manual boot using ``-device loader``:
+
+In this approach, users manually load firmware and assign entry points via
QEMU loader devices.
+By default, the PSP begins execution at address ``0x430000000``, the load
address of the bl31
+firmware. The SSP and TSP start in the powered-off state and must be
explicitly enabled by the
+PSP through writes to SCU registers.
Steps to boot the AST2700fc machine:
-1. Ensure you have the following AST2700A1 binaries available in a directory
+1. Ensure you have the following AST2700 binaries available in a directory
* u-boot-nodtb.bin
* u-boot.dtb
* bl31.bin
* optee/tee-raw.bin
* image-bmc
- * zephyr-aspeed-ssp.elf (for SSP firmware, CPU 5)
- * zephyr-aspeed-tsp.elf (for TSP firmware, CPU 6)
+ * zephyr-aspeed-ssp.bin (for SSP firmware, CPU 5)
+ * zephyr-aspeed-tsp.bin (for TSP firmware, CPU 6)
2. Execute the following command to start ``ast2700fc`` machine:
@@ -410,6 +418,8 @@ Steps to boot the AST2700fc machine:
$ qemu-system-aarch64 -M ast2700fc \
-device loader,force-raw=on,addr=0x400000000,file=${IMGDIR}/u-boot.bin \
+ -device
loader,force-raw=on,addr=0x42C000000,file=${IMGDIR}/zephyr-aspeed-ssp.bin \
+ -device
loader,force-raw=on,addr=0x42E000000,file=${IMGDIR}/zephyr-aspeed-tsp.bin \
-device loader,force-raw=on,addr=0x430000000,file=${IMGDIR}/bl31.bin \
-device
loader,force-raw=on,addr=0x430080000,file=${IMGDIR}/optee/tee-raw.bin \
-device loader,cpu-num=0,addr=0x430000000 \
@@ -423,6 +433,27 @@ Steps to boot the AST2700fc machine:
-snapshot \
-S -nographic
+Boot using a virtual boot ROM (-bios):
+
+In this method, the virtual boot ROM (vbootrom) handles the full
initialization sequence.
+It starts the PSP, which then enables the SSP and TSP by programming the
appropriate SCU
+registers, following the hardware behavior.
+
+Execute the following command to start ``ast2700fc`` machine:
+
+.. code-block:: bash
+
+ IMGDIR=ast2700-default
+
+ $ qemu-system-aarch64 -M ast2700fc \
+ -bios ast27x0_bootrom.bin \
+ -drive file=${IMGDIR}/image-bmc,if=mtd,format=raw \
+ -serial pty -serial pty -serial pty \
+ -snapshot \
+ -S -nographic
+
+Serial Console Redirection:
+
After launching QEMU, serial devices will be automatically redirected.
Example output:
--
2.43.0
