ESP32-S3 in QEMU: PSRAM cannot work for esp32s3 device (QEMU-211)

[dongsheng28849455]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate.
• Described the feature in detail and justified the reason for the request.
• Provided specific use cases and examples.

Feature description

Is it possible to support PSRAM for S3 also?

Use cases

In nuttx nsh, we expect the umem can be 32M size.
NuttShell (NSH) NuttX-12.6.0-RC1
nsh> free
total used free maxused maxfree nused nfree
Kmem: 359196 16612 342584 17000 342584 43 1
Umem: 33161212 10596 33150616 10984 33150616 9 1

Alternatives

No response

Additional context

When I try to enable the PSRAM, I met several issues:
1, Similar with #57, neither SPIRAM_SPEED_80M nor SPIRAM_SPEED_40M can work
2, The ESP32S3MMUEntry e value will be overwritten by e.reserved
4, dcache was created as rom device, so dbus address cannot be written
3, SSS_PSRAM does not attach to SPI1 for S3 machine
4, RAM size larger than 4 MB not supported, seems S3 can support 32M as maximum.

[igrr]

Yes, as you found, PSRAM support is not implemented for S3 yet.

We'll update this issue when that gets done.

[dongsheng28849455]

Yes, as you found, PSRAM support is not implemented for S3 yet.

We'll update this issue when that gets done.

Can I ask will you implement it recently?

[dongsheng28849455]

I try to fix it by #104, please help review it, thanks.

[o-marshmallow]

Hello @dongsheng28849455 ,

Sorry for not giving more updates about this. A few days ago, we opened an internal MR to add support for the PSRAM on the S3. It is currently under review.

[igrr]

PSRAM support for ESP32-S3 has been merged in 39534c3 and 89fe574, will appear in the next release.

[dongsheng28849455]

Thanks for your works, when i test it, seems the get_eid_by_size does not handle the case of size_mbytes equal to 16M or 32M?