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Code Issues Releases Activity

Update some speaker notes for bare metal Rust section (#2764)

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Andrew Walbran
2025-06-02 19:16:09 +01:00
committed by GitHub
parent 64ef712d7d
commit c1773a7fdb
2 changed files with 4 additions and 5 deletions
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1
src/bare-metal/aps/better-uart/driver.md
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@ -12,6 +12,7 @@ Now let's use the new `Registers` struct in our driver.
register. The caller of `UniqueMmioPointer::new` promises that it is valid and register. The caller of `UniqueMmioPointer::new` promises that it is valid and
unique for the given lifetime, so it can provide safe methods to read and unique for the given lifetime, so it can provide safe methods to read and
write fields. write fields.
- Note that `Uart::new` is now safe; `UniqueMmioPointer::new` is unsafe instead.
- These MMIO accesses are generally a wrapper around `read_volatile` and - These MMIO accesses are generally a wrapper around `read_volatile` and
`write_volatile`, though on aarch64 they are instead implemented in assembly `write_volatile`, though on aarch64 they are instead implemented in assembly
to work around a bug where the compiler can emit instructions that prevent to work around a bug where the compiler can emit instructions that prevent

8
src/bare-metal/useful-crates/aarch64-paging.md
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@ -25,13 +25,11 @@ idmap.activate();
<details> <details>
- For now it only supports EL1, but support for other exception levels should be
straightforward to add.
- This is used in Android for the [Protected VM Firmware][2]. - This is used in Android for the [Protected VM Firmware][2].
- There's no easy way to run this example, as it needs to run on real hardware - There's no easy way to run this example by itself, as it needs to run on real
or under QEMU. hardware or under QEMU.
</details> </details>
[1]: https://crates.io/crates/aarch64-paging [1]: https://crates.io/crates/aarch64-paging
[2]: https://cs.android.com/android/platform/superproject/+/master:packages/modules/Virtualization/pvmfw/ [2]: https://cs.android.com/android/platform/superproject/main/+/main:packages/modules/Virtualization/guest/pvmfw/