u-boot.git/board/emulation, branch v2019.04

riscv: Rename cpu/qemu to cpu/generic

2019-02-27T01:12:33Z

The QEMU CPU support under arch/riscv is pretty much generic and works fine for SiFive Unleashed as well. In fact, there will be quite a few RISC-V SOCs for which QEMU CPU support will work fine. This patch renames cpu/qemu to cpu/generic to indicate the above fact. If there are SOC specific errata workarounds required in cpu/generic then those can be done at runtime in cpu/generic based on CPU vendor specific DT compatible string. Signed-off-by: Anup Patel Reviewed-by: Alexander Graf Reviewed-by: Lukas Auer Reviewed-by: Bin Meng

riscv: qemu: Imply SIFIVE_SERIAL for emulation

2018-12-18T01:56:54Z

This patch enables SiFive UART driver for QEMU RISC-V emulation by implying SIFIVE_SERIAL on BOARD_SPECIFIC_OPTIONS. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Tested-by: Bin Meng

riscv: qemu: Add platform-specific Kconfig options

2018-12-18T01:56:27Z

Add the QEMU RISC-V platform-specific Kconfig options, to include CPU and timer drivers. Signed-off-by: Bin Meng Reviewed-by: Lukas Auer Reviewed-by: Anup Patel

riscv: Add S-mode defconfigs for QEMU virt machine

2018-12-05T06:14:04Z

This patch adds S-mode defconfigs for QEMU virt machine so that we can run u-boot in S-mode on QEMU using M-mode runtime firmware (BBL or equivalent). Signed-off-by: Anup Patel Reviewed-by: Bin Meng Tested-by: Bin Meng Reviewed-by: Lukas Auer

riscv: qemu: Use different SYS_TEXT_BASE for S-mode

2018-12-05T06:13:59Z

When u-boot runs in S-mode, the M-mode runtime firmware (BBL or equivalent) uses memory range in 0x80000000 to 0x80200000. Due to this, we cannot use 0x80000000 as SYS_TEXT_BASE when running in S-mode. Instead for S-mode, we use 0x80200000 as SYS_TEXT_BASE. Even Linux RISC-V kernel ignores/reserves memory range 0x80000000 to 0x80200000 because it runs in S-mode. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Tested-by: Bin Meng Reviewed-by: Lukas Auer

riscv: qemu: clear kernel-start/-end in device tree as workaround for BBL

2018-11-26T05:57:33Z

QEMU specifies the location of Linux (supplied with the -kernel argument) in the device tree using the riscv,kernel-start and riscv,kernel-end properties. We currently rely on the SBI implementation of BBL to run Linux and therefore embed Linux as payload in BBL. This causes an issue, because BBL detects the kernel properties in the device tree and ignores the Linux payload as a result. Work around this issue by clearing the kernel properties in the device tree before booting Linux. Signed-off-by: Lukas Auer Reviewed-by: Bin Meng

riscv: qemu: detect and boot the kernel passed by QEMU

2018-11-26T05:57:33Z

QEMU embeds the location of the kernel image in the device tree. Store this address in the environment as variable kernel_start. It is used in the board-local distro boot command QEMU to boot the kernel with the U-Boot device tree. The QEMU boot command is added as the first boot target device. Signed-off-by: Lukas Auer Reviewed-by: Bin Meng Reviewed-by: Alexander Graf

riscv: qemu: use device tree passed by prior boot stage

2018-11-26T05:57:32Z

QEMU provides a device tree, which is passed to U-Boot using register a1. We are now able to directly select the device tree with the configuration CONFIG_OF_PRIOR_STAGE. Replace the hard-coded address in qemu-riscv with it. Signed-off-by: Lukas Auer Reviewed-by: Bin Meng Reviewed-by: Rick Chen

x86: qemu: Imply virtio PCI transport and device drivers

2018-11-14T17:16:28Z

Add virtio drivers for QEMU x86 targets. Signed-off-by: Bin Meng Reviewed-by: Simon Glass

arm: qemu: Enumerate virtio bus during early boot

2018-11-14T17:16:28Z

Currently devices on the virtio bus is not automatically enumerated, which means peripherals on the virtio bus are not discovered by their drivers. This uses board_init() to do the virtio enumeration. Signed-off-by: Bin Meng Reviewed-by: Simon Glass