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Wrong CMSIS mpu definitions? #1027

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opened 2022-09-16 20:09:10 -05:00 by WestfW · 2 comments

WestfW commented

2022-09-16 20:09:10 -05:00

(Migrated from github.com)

as part of the CMSIS add, there exists a file:
.../src/rp2_common/cmsis/stub/CMSIS/Core/Include/mpu_armv7.h
containing the memory protection unit definitions for "ARM v7m" cpus.

But the rp2040 is a Cortex M0, which is a v6m cpu.

(Nothing currently uses this file, as far as I can tell, and I don't know if there even exists an mpu_armv6.h)

as part of the CMSIS add, there exists a file: .../src/rp2_common/cmsis/stub/CMSIS/Core/Include/mpu_armv7.h containing the memory protection unit definitions for "ARM v7m" cpus. But the rp2040 is a Cortex M0, which is a **v6m** cpu. (Nothing currently uses this file, as far as I can tell, and I don't know if there even exists an mpu_armv6.h)

lurch commented

2022-09-17 06:07:06 -05:00

(Migrated from github.com)

I don't know if there even exists an mpu_armv6.h

Even the upstream CMSIS "only" has mpu_armv7.h and mpu_armv8.h.

But there does appear to be a bunch of MPU defines inside core_cm0plus.h ?

> I don't know if there even exists an mpu_armv6.h Even the [upstream CMSIS](https://github.com/ARM-software/CMSIS_5/tree/develop/CMSIS/Core/Include) "only" has `mpu_armv7.h` and `mpu_armv8.h`. But there **does** appear to be a bunch of MPU defines inside [core_cm0plus.h](https://github.com/raspberrypi/pico-sdk/blob/master/src/rp2_common/cmsis/stub/CMSIS/Core/Include/core_cm0plus.h#L522) ?

kilograham commented

2022-10-21 15:41:14 -05:00

(Migrated from github.com)

We just package what they have; keeping this around though as we look at more CMSIS integration

We just package what they have; keeping this around though as we look at more CMSIS integration

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