On Tue, Jan 09, 2018 at 04:34:28PM +0200, Tuomas Tynkkynen wrote:
It's mostly obvious, except that QEMU is annoying and requires an explicit '-cpu cortex-a57' (or some other 64-bit core) to actually run in 64-bit mode.
Signed-off-by: Tuomas Tynkkynen tuomas.tynkkynen@iki.fi
doc/README.qemu-arm | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-)
diff --git a/doc/README.qemu-arm b/doc/README.qemu-arm index 2895e3b97f..5fe8e87a5c 100644 --- a/doc/README.qemu-arm +++ b/doc/README.qemu-arm @@ -4,11 +4,12 @@ # SPDX-License-Identifier: GPL-2.0+ #
-U-Boot on QEMU's 'virt' machine on ARM
+U-Boot on QEMU's 'virt' machine on ARM & AArch64 +================================================
QEMU for ARM supports a special 'virt' machine designed for emulation and virtualization purposes. This document describes how to run U-Boot under it. +Both 32-bit ARM and AArch64 are supported.
The 'virt' platform provides the following as the basic functionality:
@@ -17,7 +18,7 @@ The 'virt' platform provides the following as the basic functionality: - A generated device tree blob placed at the start of RAM - A freely configurable amount of RAM, described by the DTB - A PL011 serial port, discoverable via the DTB
- An ARMv7 architected timer
- An ARMv7/ARMv8 architected timer
- PSCI for rebooting the system
- A generic ECAM-based PCI host controller, discoverable via the DTB
@@ -25,19 +26,31 @@ Additionally, a number of optional peripherals can be added to the PCI bus.
Building U-Boot
-Set the CROSS_COMPILE and ARCH=arm environment variables as usual, and run: +Set the CROSS_COMPILE environment variable as usual, and run:
+- For ARM:
- export ARCH=arm make qemu_arm_defconfig make
+- For AArch64:
- export ARCH=arm64
- make qemu_arm64_defconfig
- make
This isn't Linux, we don't need ARCH set in the env, it's part of the Kconfig choices. Thanks!