bors[bot] 755442fe27

Merge #19712 ...

19712: cpu/riscv: Add PMP driver r=MrKevinWeiss a=Teufelchen1

### Contribution description

Hi! 🐘 

this adds a basic RISC-V physical memory protection (PMP) driver to RIOT. Well, 'driver' might be a stretched, feels more like a little utility :)

EDIT: Also added  a no-execute RAM option for the hifive & a corresponding test

Since I only have an Hifive rev b, it's only enabled on this board / cpu. I also tested the code on an ESP32-C but the feature can't be enabled there, as `cpu/riscv_common/` is not used by the ESP32...

### Testing procedure

* Grab a hifive rev b
* go to `examples/hello-world`
* Add `USEMODULES += periph_pmp` to the `Makefile`
* Include `pmp.h` in `main.c`
* Add code e.g. `print_pmpcfg(0);`
* compile & flash & term 

You should see something like this:
```
# Hello World!
# You are running RIOT on a(n) hifive1b board.
# This board features a(n) fe310 MCU.
# pmp00cfg: - R-X OFF   0x00000000 - 0x00000000
```



Co-authored-by: Teufelchen1 <bennet.blischke@outlook.com>

2023-06-29 09:57:31 +00:00

..

include

Merge #19712

2023-06-29 09:57:31 +00:00

assert.c

core/lib: do not use DEBUG_BREAKPOINT by default

2023-06-27 17:04:27 +02:00

atomic_c11.c

core: split out library code

2022-03-09 21:43:05 +01:00

atomic_sync.c

core: split out library code

2022-03-09 21:43:05 +01:00

bitarithm.c

bitarithm: Move extern const out of static inline functions

2022-05-29 13:59:39 +02:00

clist.c

core: split out library code

2022-03-09 21:43:05 +01:00

init.c

core/init: allow to run callback on main exit

2023-01-20 17:41:30 +01:00

Makefile

core: split out library code

2022-03-09 21:43:05 +01:00

panic.c

core/assert: print last instruction in assert()

2022-06-12 14:18:53 +02:00

priority_queue.c

core: split out library code

2022-03-09 21:43:05 +01:00

ringbuffer.c

core: split out library code

2022-03-09 21:43:05 +01:00

rmutex.c

core: split out library code

2022-03-09 21:43:05 +01:00