Andrei Gherzan fafad9b025 raspberrypi4-64.conf: Limit RAM to 3G ...

The PCI controller on the Raspberry Pi 4 acts as a DMA controller and can
only address the first 3Gb[1] of the memory space. On 32bit this was
addressed by implementing bouncing buffers[2] but this currently has no
support for arm64. In order to have working USB, as a workaround, we
limit the ram to 3G.

Fixes #446

[1] https://github.com/raspberrypi/linux/issues/3093
[2] https://github.com/raspberrypi/linux/blob/rpi-4.19.y/drivers/pci/controller/pcie-brcmstb-bounce.c

Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>

2019-07-25 13:27:52 +01:00

..

machine

raspberrypi4-64.conf: Limit RAM to 3G

2019-07-25 13:27:52 +01:00

layer.conf

layer.conf: Add warrior to compatible release series

2019-04-05 11:21:49 +09:00