From: Heinrich Schuchardt Date: Thu, 23 Jan 2025 02:46:51 +0000 (+0100) Subject: doc: describe creating a pflash file for qemu-system-riscv64 X-Git-Tag: v2025.04-rc1~8^2~5 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a713ab1c63fd5efb1f71caf6678166f9a7447be;p=pandora-u-boot.git 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 --- 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: