On Wed, Dec 11, 2019 at 11:24:00 +0000, Pete Batard wrote: > Similar to what is the case with the Raspberry Pi 3, the Raspberry Pi > 4 UEFI firmware requires the provision of a Trusted Firmware binary > (TF-A). > > The binary is built for a dtb base address of 0x00020000 and a UEFI > payload base address of 0x00030000. > > Binaries are built using a custom version of TF-A (the source of which > is documented in the Readme), since the official repository is missing > a fix to get proper baudrate when using a recent version of start4.elf, > as we as the ability to switch between PL011 and mini UART. We are > currently working with TF-A to upstream both these fixes so that we can > switch to binaries built from official source at a later date. > > In order to provide the ability to switch serial I/O controllers, a > feature we will be adding to the RPi4 UEFI Firmware, and not lose TF-A > output, two binaries are provided, one for mini UART output and one for > PL011 output. > > Signed-off-by: Pete Batard <p...@akeo.ie> > --- > Platform/RaspberryPi/RPi4/TrustedFirmware/License.txt | 26 > ++++++++++++++++++++ > Platform/RaspberryPi/RPi4/TrustedFirmware/Readme.md | 12 +++++++++ > Platform/RaspberryPi/RPi4/TrustedFirmware/bl31_miniuart.bin | Bin 0 -> 41072 > bytes > Platform/RaspberryPi/RPi4/TrustedFirmware/bl31_pl011.bin | Bin 0 -> 41072 > bytes > 4 files changed, 38 insertions(+) >
> new file mode 100644 > index 000000000000..7f1749dfc3a0 > --- /dev/null > +++ b/Platform/RaspberryPi/RPi4/TrustedFirmware/Readme.md > @@ -0,0 +1,12 @@ > +ARM Trusted Firmware for Raspberry Pi 4 > +======================================= > + > +The `bl31_#####.bin` TF-A binaries found in this repository were built on a > Debian 10.2 system > +from https://github.com/pbatard/arm-trusted-firmware/tree/pi4 (pi4 branch) > using the command: > + > +``` > +make PLAT=rpi4 RPI3_PRELOADED_DTB_BASE=0x20000 PRELOADED_BL33_BASE=0x30000 > SUPPORT_VFP=1 [RPI3_USE_PL011_UART=1] DEBUG=0 all > +``` > + > +The only difference between these firmwares is that the > `RPI3_USE_PL011_UART=1` option was added > +to build `bl31_pl011.bin` so that it uses PL011 for serial output rather > than the "mini UART". Sanity check: do the build commands still use RPI3_ options for rpi4? Best Regards, Leif -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#52125): https://edk2.groups.io/g/devel/message/52125 Mute This Topic: https://groups.io/mt/68147438/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-