Re: [PATCH v3 3/4] arm64: dts: qcom: sdm630: describe adsp_mem region properly

[Alexey Minnekhanov]

On 01.07.2026 15:48, Konrad Dybcio wrote:
> On 4/27/26 5:20 PM, Nickolay Goppen wrote:
> > 27.04.2026 14:49, Konrad Dybcio wrote:
> > > Please make this = <0x0 0x80000000 0x0 0x80000000>; instead, since the RAM
> > > starts at 0x80000000
> >
> > +Alexey Min found out that on 3 GiB xiaomi-lavender RAM starts at 0x40000000
> >
> > 40000000-855fffff : System RAM
> >    40080000-41bfffff : Kernel code
> >    42600000-42fd0fff : Kernel data
> > 88f00000-8abfffff : System RAM
> > 95000000-feabffff : System RAM
>
> My docs happen to be silent on this subject..
> Do you have a device that has more/less RAM to compare?

I do have quite a bunch of devices based on sdm630/636/660.
Logs from UART including longs from stock bootloader are only
available for lavender,  though. For others I collected dumps
of /proc/iomem (and debug/memblock/memory):

* sdm630-sony-pioneer (3 Gb, phone):
  80000000-855fffff : System RAM
    80080000-81dfffff : Kernel code
    82600000-82e30fff : Kernel data
  88f00000-8abfffff : System RAM
  94b00000-ffafffff : System RAM
  ffc00000-ffcfffff : persistent_ram
  ffd00000-13eabffff : System RAM

  Similarly:
  H4113:/ # cat /sys/kernel/debug/memblock/memory 
 
 

   0: 0x0000000080000000..0x00000000855fffff
   1: 0x0000000088f00000..0x000000008abfffff
   2: 0x0000000094b00000..0x00000000ffafffff
   3: 0x00000000ffd00000..0x000000013eabffff

* sdm636-xiaomi-whyred (3 Gb, phone):
  40000000-855fffff : System RAM
    40080000-41dfffff : Kernel code
    42600000-42e46fff : Kernel data
  88f00000-8abfffff : System RAM
  94b00000-9fffffff : System RAM
  a0000000-a01fffff : persistent_ram
  a0200000-a03fffff : persistent_ram
  a0400000-feabffff : System RAM

  whyred:/ # cat /sys/kernel/debug/memblock/memory 
 
 

   0: 0x0000000040000000..0x00000000855fffff
   1: 0x0000000088f00000..0x000000008abfffff
   2: 0x0000000094b00000..0x000000009fffffff
   3: 0x00000000a0400000..0x00000000feabffff

* sdm636-asus-x00td (4Gb, phone)
  80000000-855fffff : System RAM
    80080000-815fffff : Kernel code
    81a00000-82057fff : Kernel data
  88f00000-8abfffff : System RAM
  94b00000-17e4bffff : System RAM

* sdm660-xiaomi-clover-plus (4 Gb, tablet)
  80000000-855fffff : System RAM
    80080000-81dfffff : Kernel code
    82600000-82e46fff : Kernel data
  88f00000-8abfffff : System RAM
  95100000-9fdfffff : System RAM
  9fe00000-9fefffff : persistent_ram
  9ff00000-17e4bffff : System RAM

* sdm660-xiaomi-jason (6 Gb, phone)
  80000000-855fffff : System RAM
    80080000-81dfffff : Kernel code
    82600000-82e41fff : Kernel data
  88f00000-8abfffff : System RAM
  95400000-afffffff : System RAM
  b0000000-b01fffff : persistent_ram
  b0200000-b03fffff : persistent_ram
  b0400000-1fd8bffff : System RAM

  jason:/ # cat /sys/kernel/debug/memblock/memory 
 
 

   0: 0x0000000080000000..0x00000000855fffff
   1: 0x0000000088f00000..0x000000008abfffff
   2: 0x0000000095400000..0x00000000afffffff
   3: 0x00000000b0400000..0x00000001fd8bffff

* sdm660-xiaomi-jasmine_sprout (6 Gb, phone)
  80000000-855fffff : System RAM
    80080000-81bfffff : Kernel code
    82400000-82c1afff : Kernel data
  88f00000-8abfffff : System RAM
  95000000-1fd8bffff : System RAM

* sdm660-xiaomi-lavender (3 Gb, phone), for completeness
  40000000-855fffff : System RAM
    40080000-41bfffff : Kernel code
    42600000-42fd0fff : Kernel data
  88f00000-8abfffff : System RAM
  95000000-feabffff : System RAM

  lavender:/ # cat /sys/kernel/debug/memblock/memory 
 
 

   0: 0x0000000040000000..0x00000000855fffff
   1: 0x0000000088f00000..0x000000008abfffff
   2: 0x0000000095000000..0x00000000feabffff

--
Regards,
Alexey Minnekhanov