Linker rtc_slow_seg(RW)

[rianovich]

Hello

In esp32_out.ld we have:

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  /* RTC slow memory (data accessible). Persists over deep sleep.

     Start of RTC slow memory is reserved for ULP co-processor code + data, if enabled.
  */
  rtc_slow_seg(RW) : org = 0x50000000 + 512,
                                     len = 0x1000 - 512

The 512 comes from desired reserve amount.
Now why total len is

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len = 0x1000 - 512

and not ?

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len = 0x2000 - 512

If I understand right, the RTC_SLOW_SEG is 8K not 4K.
Am I missing something?

Thanks

[ESP_igrr]

I think the higher 4k are reserved for future use by the WiFi driver. In the current versions (latest git), you can modify the size to 8k if you need.