nordic-dev.net/embassy
2
0
Fork 0
mirror of https://github.com/embassy-rs/embassy.git synced 2024-11-25 16:23:10 +00:00
Code Issues Packages Projects Releases Wiki Activity

rp: fix multicore stack guard setup

Browse Source 
the region field of the register is four bits wide followed by the valid
bit that causes the rnr update we rely on for the rasr write. 0x08 is
just a bit short to reach the valid bit, and since rp2040 has only 8
regions it (at best) doesn't do anything at all.
This commit is contained in:
pennae 2023-07-20 16:08:59 +02:00
parent 3382ca1a54
commit 4d6b3c57b1
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
embassy-rp/src/multicore.rs
View File

@ -74,7 +74,7 @@ fn install_stack_guard(stack_bottom: *mut usize) {
let subregion_select = 0xff ^ (1 << ((addr >> 5) & 7)); let subregion_select = 0xff ^ (1 << ((addr >> 5) & 7));
unsafe { unsafe {
core.MPU.ctrl.write(5); // enable mpu with background default map core.MPU.ctrl.write(5); // enable mpu with background default map
core.MPU.rbar.write((addr & !0xff) | 0x8); core.MPU.rbar.write((addr & !0xff) | (1 << 4)); // set address and update RNR
core.MPU.rasr.write( core.MPU.rasr.write(
1 // enable region 1 // enable region
| (0x7 << 1) // size 2^(7 + 1) = 256 | (0x7 << 1) // size 2^(7 + 1) = 256