pkarashchenko commented on code in PR #8779:
URL: https://github.com/apache/nuttx/pull/8779#discussion_r1133752700
##########
arch/arm64/src/fvp-v8r/fvp_lowputc.S:
##########
@@ -50,24 +50,6 @@
* Public Functions
****************************************************************************/
-/* PL011 UART initialization
- * xb: register which contains the UART base address
- * c: scratch register number
- */
-
-GTEXT(up_earlyserialinit)
-SECTION_FUNC(text, up_earlyserialinit)
Review Comment:
But the things done here are completely different from what is done in
`arm64_earlyserialinit`. This code is branched very early from ASM code and uses
```
GTEXT(arm64_lowputc)
SECTION_FUNC(text, arm64_lowputc)
ldr x15, =CONFIG_UART0_BASE
early_uart_ready x15, w2
early_uart_transmit x15, w0
ret
```
for the low level output. If we remove the `up_earlyserialinit` then non of
the lines like `PRINT(primary_boot, "- Ready to Boot Primary CPU\r\n")` will be
ever printed.
I will take a look into https://github.com/apache/nuttx/pull/8716 , but
seems like we might be breaking an important path of debugging early startup
process
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