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|
ARM Trusted Firmware for Raspberry Pi 3
=======================================
The `bl1.bin` and `fip.bin` TF-A binaries found in this directory were built from the
[official TF-A 2.9 release](https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tag/?h=v2.9)
through a [GitHub build script](https://github.com/pftf/pitf/blob/master/.github/workflows/build.yml)
that is designed to provide evidence that these binaries match the vanilla TF-A source.
Per the [GitHub Actions log](https://github.com/pftf/pitf/actions/runs/5071490963),
the SHA-256 sums for the blobs can be validated to be as follows:
- `bl1.bin`: `de32a81d17a3a1251245dd6d9b0a807e6ec54d5b50eecfda31fc9cd2ffb1d5ba`
- `fip.bin`: `7463cec7914469998d3cfab80b80710e371e8d5673959b303a7c851e37b179bb`
For Raspberry Pi 3 usage, TF-A was built using the command:
```
make PLAT=rpi3 RPI3_PRELOADED_DTB_BASE=0x10000 PRELOADED_BL33_BASE=0x30000 SUPPORT_VFP=1 RPI3_USE_UEFI_MAP=1 DEBUG=0 fip all
```
which results in the following memory mapping:
```
0x00000000 +-----------------+
| ROM | BL1
0x00010000 +-----------------+
| Nothing |
0x00020000 +-----------------+
| FIP |
0x00030000 +-----------------+
| |
| UEFI PAYLOAD |
| |
0x001f0000 +-----------------+
| DTB | (Loaded by the VideoCore)
0x00200000 +-----------------+
| Secure SRAM | BL2, BL31
0x00300000 +-----------------+
| Secure DRAM | BL32 (Secure payload)
0x00400000 +-----------------+
| |
| |
| Non-secure DRAM | BL33
| |
| |
0x01000000 +-----------------+
| |
| ... |
| |
0x3F000000 +-----------------+
| I/O |
```
|
