Re: [PATCH 2/2] parisc: Provide a trivial PDC-based io_module for kgdb

[Rolf Eike Beer <eike-kernel@xxxxxxxxx>]

Am Mittwoch, 5. Januar 2022, 22:45:52 CET schrieb Helge Deller:
> Add a simple keyboard driver for usage of PDC I/O functions
> with kgdb. This driver makes it possible to use KGDB with QEMU.
> 
> Signed-off-by: Helge Deller <deller@xxxxxx>
> ---
>  arch/parisc/kernel/toc.c | 27 +++++++++++++++++++++++++++
>  1 file changed, 27 insertions(+)
> 
> diff --git a/arch/parisc/kernel/toc.c b/arch/parisc/kernel/toc.c
> index 18327611cf8f..dfe7cccc086f 100644
> --- a/arch/parisc/kernel/toc.c
> +++ b/arch/parisc/kernel/toc.c
> @@ -109,3 +109,30 @@ static __init int setup_toc(void)
>  	return 0;
>  }
>  early_initcall(setup_toc);
> +
> +

double newline

> +#ifdef CONFIG_KGDB_KDB
> +/* read a character, return -1 if no char can be polled. */
> +static int kgdbpdc_read_char(void)
> +{
> +	return pdc_iodc_getc();
> +}
> +
> +static void kgdbpdc_write_char(u8 chr)
> +{
> +	/* no need to print char. kdb will do it. */

kgdb?

Eike

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