9 Commits (7d025375156097127e788d6d983a83d043e68a1c)

Author SHA1 Message Date
Andre Richter 7d02537515
Bump toolchain 3 years ago
Andre Richter 02c01c821b
Refactor memory subsystem code
This patch refactors big chunks of the memory subsystem code.

Most of all, it does away with the the design being based around the raw pointer
type "*const Page". While raw pointers to an actual page seemed like a
compelling idea, in practice it turned out difficult. Rust feels a bit
inconsistent with respect to raw pointers. While it is safe to create them out
of nowhere (only dereferencing is unsafe), it gets weird when multi-threading
comes into picture.

For example, wrapping them into synchronization primitives caused issues because
they don't implement Send. For this reason, we switch to the PageAddress type
which is based on usize, which makes things a lot easier.

Other changes/benefits include:

- Gets rid of unsafe code in the removed PageSlice type.

- Decouple the translation table code and MMIO VA allocation.

- For the translation table tool, make better use of what the ELF format already
  provides with respect to memory segmentation and translation. For example, the
  tool now queries the ELF file for VA->PA translations and other segment
  attributes. This has also the added benefit of reduced BSP code and more
  generic code in the tool.

- Packs rbelftools in the Docker image now (used by translation table tool).

- In tutorials 14/15/16, rearrange the PA and VA layout.
3 years ago
Andre Richter 909b05b23f
Bump compiler version 3 years ago
Andre Richter de3ba3e871 Refactor Tests and Makefile
- Carve out common files for tests
- Add boot tests starting tutorial 3
- Overhaul the Makefile for more structure
3 years ago
Andre Richter 04e0f5bae0 Switch to tock-registers: Sources for tutorial 16 3 years ago
Andre Richter 7f666000ce
Init DRAM in assembly instead of Rust
See https://github.com/rust-embedded/cortex-m-rt/issues/300
3 years ago
Andre Richter f6f668c781
Fix misspelled clippy lint 3 years ago
Andre Richter 9f1920c2c6
Give the project a name
🦩
3 years ago
Andre Richter b4e3ebc606
Add tutorial 16 3 years ago