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| author | Heinrich Schuchardt <[email protected]> | 2025-01-23 03:46:51 +0100 |
|---|---|---|
| committer | Heinrich Schuchardt <[email protected]> | 2025-01-26 11:06:56 +0100 |
| commit | 7a713ab1c63fd5efb1f71caf6678166f9a7447be (patch) | |
| tree | 48c4dcd33c13225f6439fe7f017fca13e9b8944a | |
| parent | e20349a38caf429f3109a6a02529573472f521ae (diff) | |
doc: describe creating a pflash file for qemu-system-riscv64
U-Boot can be executed in place from a flash device.
Describe how this can be emulated on RISC-V QEMU.
Signed-off-by: Heinrich Schuchardt <[email protected]>
| -rw-r--r-- | doc/board/emulation/qemu-riscv.rst | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/doc/board/emulation/qemu-riscv.rst b/doc/board/emulation/qemu-riscv.rst index 8388e13d96d..cf2f893b723 100644 --- a/doc/board/emulation/qemu-riscv.rst +++ b/doc/board/emulation/qemu-riscv.rst @@ -42,6 +42,23 @@ use the configurations qemu-riscv32_smode_defconfig and qemu-riscv64_smode_defconfig instead. Note that U-Boot running in supervisor mode requires a supervisor binary interface (SBI), such as RISC-V OpenSBI. +To create a U-Boot binary that can be utilized with a pflash device in QEMU +apply these addtional settings to qemu-riscv64_smode_defconfig: + +:: + + CONFIG_TEXT_BASE=0x20000000 + CONFIG_XIP=y + # CONFIG_AVAILABLE_HARTS is not set + CONFIG_SYS_MONITOR_BASE=0x80200000 + +Truncate the resulting u-boot.bin to 32 MiB. Add the following to your +qemu-system-riscv64 command: + +.. code-block:: bash + + -drive if=pflash,format=raw,unit=0,file=u-boot.bin + Running U-Boot -------------- The minimal QEMU command line to get U-Boot up and running is: |