This adds support for executing UEFI in a QEMU/mach-virt emulated environment.
The following assumptions are made about the target:
- DRAM base at 0x4000_0000, containing the device tree blob
- DRAM size at least 1 MB
- device tree uses 64-bit physical base addresses and sizes
- ARM architected timer
- Cortex-A15 CPU (if built for 32-bit)
The following information is retrieved from the device tree:
- PL011 UART base address
- GIC base addresses
- virtual timer interrupt
- PL031 RTC base address
- DRAM size, must be at least 128 MB
- virtio MMIO transports
- PSCI 0.2 availability (for reset and poweroff)
The device tree image is relocated and installed as a configuration table
so an EFI stub enabled kernel can be booted directly without the need for
a bootloader.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Casadevall <michael.casadevall@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-By: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16141 6f19259b-4bc3-4df7-8a09-765794883524
This is an implementation of ArmPlatformLib that discovers the size of system
DRAM from a device tree blob located at the address passed in
gArmTokenSpaceGuid.PcdDeviceTreeBaseAddress, which should equal the value in
gArmTokenSpaceGuid.PcdSystemMemoryBase.
As the device tree blob is passed in system DRAM, this library can only be used
if sufficient DRAM is available (>= 128 MB) and if not using shadowed NOR. The
reason for this is that it makes it easier to guarantee that such a device tree
blob at base of DRAM will not be clobbered before we get a chance to preserve it.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Casadevall <michael.casadevall@linaro.org>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-By: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16138 6f19259b-4bc3-4df7-8a09-765794883524
Michael Casadevall