14 Commits (2432c0d283883ea87b5f2e70eed36971d74d44df)

Author SHA1 Message Date
Andre Richter 2432c0d283
Revert to assembly boot code
It is too risky to rely on the compiler to not insert any operations using the
stack.

Having a stack-setting call in Rust using the cortex-a crate as the first action
in a Rust-only _start() function does not work if you're subsequently using the
stack, because the compiler often inserts the operations to make room on the
stack to prepare a function call BEFORE the call to set the stack, which crashes
the boot process.

Hence, keep on using a small piece of assembly boot code throughout.
3 years ago
Andre Richter 223989adb9
Overhaul linker script 3 years ago
Andre Richter 44bb3f8942
Update copyright year 4 years ago
Andre Richter 098e19ecc4
Fix zero-sized bss handling 4 years ago
Andre Richter 27a1d10cc3
Remove UB in linker script symbol <-> Rust handover 4 years ago
Andre Richter 37b9d1435e
Move anything wrt linker symbols to bsp::memory
Also, some rewording of data types.
4 years ago
Andre Richter e8d787f627
Refactor tutorial 02 4 years ago
Andre Richter 6d9641d05f
Fix possibility of (.bss size) mod 8 != 0 5 years ago
Andre Richter e690f8e7e4
Copyright bump to 2020 🎆 5 years ago
Andre Richter 54137e8b38
Relicense as dual MIT OR Apache-2.0 5 years ago
Andre Richter 2fe2dcba6d
Add support for Raspberry Pi 4 🎉 5 years ago
Andre Richter 038c558ac8
Big restructuring for more modularity
- Make architecture code separate from BSP code
- Make BSPs pull in drivers from a generic folder
    - Enables reuse of drivers between different BSPs.
5 years ago
Andre Richter dd4a132259
Change linker scripts 5 years ago
Andre Richter d6accd6c69
Add code for tutorial 02 5 years ago