Boot Zephyr

We may follow below steps to setup Zephyr with SBL on UP² maker board and QEMU.

UP² Board

1. Follow Getting Started Guide to setup Zephyr build/dev environment

2. Build an application uses synchronization sample application:

1. setup zephyr environment:

   source zephyr-env.sh
   
   or
   
   zephyr-env.cmd
   

2. Build sample application for UP² board:

   cd samples/synchronization
   mkdir build_up2 && cd build_up2
   cmake -GNinja -DBOARD=up_squared_sbl ..
   ninja
   

   Output file: samples/synchronization/build_up2/zephyr/zephyr.elf

3. Build SBL image with zephyr.elf as a direct payload for simple test.

• build Slim Bootloader for UP² board with the built zephyr.elf:

  python BuildLoader.py build apl -p <zephyr_root>/samples/synchronization/build_up2/zephyr/zephyr.elf
  

4. Create a IFWI for UP², follow the steps here.

5. Flash IFWI and check the zephyr up & running thru serial console:

   ......
   Stage2 heap: 0xB4C000 (0x10C000 used, 0xA40000 free)
   Payload ent***** Booting Zephyr OS zephyr-v1.13.0-1689-g4a7c422182 *****
   threadA: Hello World from up_squared!
   threadB: Hello World from up_squared!
   threadA: Hello World from up_squared!
   threadB: Hello World from up_squared!
   threadA: Hello World from up_squared!
   

QEMU

1. Build an application uses synchronization sample application:

1. setup zephyr environment:

   source zephyr-env.sh
   
   or
   
   zephyr-env.cmd
   

2. Build sample application for QEMU:

   cd samples/synchronization
   mkdir build_qemu && cd build_qemu
   cmake -GNinja -DBOARD=qemu_x86 ..
   ninja
   

   Output file: samples/synchronization/build_qemu/zephyr/zephyr.elf

2. Build SBL image with zephyr.elf as as payload for simple test.

Build SBL to include zephyr.elf:

python BuildLoader.py build qemu -p <zephyr_root>/samples/synchronization/build_qemu/zephyr/zephyr.elf

3. Run QEMU and check the zephyr up & running thru serial console :

1. Execute QEMU:

   qemu-system-x86_64 -m 256M -machine q35 -nographic -pflash Outputs/qemu/SlimBootloader.bin
   

2. Check result thru serial console:

   ......
   Payload entry: 0x00001000
   Jump to payload
   ***** Booting Zephyr OS zephyr-v1.13.0-1689-gbc34b1aa09 *****
   threadA: Hello World from qemu_x86!
   threadB: Hello World from qemu_x86!
   threadA: Hello World from qemu_x86!