tree b0309877c972fa382c033802d72e2feb6976a353
parent cd1f45c21d7e152eba000bf7c2168aaff800ed37
author Bin Meng <bmeng.cn@gmail.com> 1537970121 -0700
committer Andes <uboot@andestech.com> 1538560117 +0800

riscv: Add QEMU virt board support

This adds QEMU RISC-V 'virt' board target support, with the hope of
helping people easily test U-Boot on RISC-V.

The QEMU virt machine models a generic RISC-V virtual machine with
support for the VirtIO standard networking and block storage devices.
It has CLINT, PLIC, 16550A UART devices in addition to VirtIO and
it also uses device-tree to pass configuration information to guest
software. It implements RISC-V privileged architecture spec v1.10.

Both 32-bit and 64-bit builds are supported. Support is pretty much
preliminary, only booting to U-Boot shell with the UART driver on
a single core. Booting Linux is not supported yet.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>