RK3588 part X small success.

[Stefan Kalkowski]

Hello Michael,

I try to summarize what I understood from your previous e-mails:

* u-boot normally starts on the RK3588 SoC in EL2 with MMU enabled,
  and enabled caches
* when using the unchanged Genode base-hw bootstrap code, you then
  stuck when issuing a Genode::raw (how do you know, it is exactly
  that point? does it provoke an exception shown by u-boot? and if yes
  what kind of exception?)
* when removing the MMU disabling within the bootstrap assembler code,
  you can proceed, and you see Genode::raw messages

Is this correct?

If the MMU disabling is the important point with regard to the UART
usage (if this is 100% the issue), either u-boot doesn't setup 1:1
physical to virtual mappings, which is less probable, or the
page-table attributes for the I/O memory mapping of the UART is
essential for the way it is used.

Regards
Stefan

On Wed, Jan 04, 2023 at 09:54:26PM +0100, Michael Grunditz wrote:
> When started in EL1. I assume I need to copy the settings from the
> setup of EL1 to EL2 or something.. I still would like a proper cpu
> init ( really bad so I might go ahead with it).
> 
> kernel initialized
> ROM modules:
> ROM: [0000000005580000,0000000005580156) config
> ROM: [000000000048a000,000000000048b000) core_log
> ROM: [0000000005634000,000000000567b5f8) init
> ROM: [0000000005588000,00000000056335f8) ld.lib.so
> ROM: [0000000000488000,0000000000489000) platform_info
> ROM: [0000000005581000,0000000005587260) test-log
> 
> Genode 22.11
> 125 MiB RAM and 64533 caps assigned to init
> [init -> test-log] hex range:          [0e00,1680)
> [init -> test-log] empty hex range:    [0abc0000,0abc0000) (empty!)
> [init -> test-log] hex range to limit: [f8,ff]
> [init -> test-log] invalid hex range:  [f8,08) (overflow!)
> [init -> test-log] negative hex char:  0xfe
> [init -> test-log] positive hex char:  0x02
> [init -> test-log] floating point:     1.70
> [init -> test-log] multiarg string:    "parent -> child.7"
> [init -> test-log] String(Hex(3)):     0x3
> [init -> test-log] Very long messages:
> [init -> test-log -> log]
> 1..................................................................................2
> [init -> test-log]
> 3.........................................................................................4
> [init -> test-log]
> 5.........................................................................................6
> [init -> test-log]
> [init -> test-log] Test done.
> 
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-- 
Stefan Kalkowski
Genode labs

https://github.com/skalk | https://genode.org