linux-kernel - Re: [PATCH] m68k/mac: Use '030 reset method on SE/30

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Date:   Sat, 22 Dec 2018 12:04:14 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Finn Thain <fthain@...egraphics.com.au>
Cc:     Joshua Thompson <funaho@...ai.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] m68k/mac: Use '030 reset method on SE/30

Hi Finn,

On Sat, Dec 22, 2018 at 4:07 AM Finn Thain <fthain@...egraphics.com.au> wrote:
> The comment says that calling the ROM routine doesn't work. But testing
> shows that the 68030 fall-back reset method does work, so just use that.
>
> Tested-by: Stan Johnson <userm57@...oo.com>
> Signed-off-by: Finn Thain <fthain@...egraphics.com.au>

Thanks for your patch!

> --- a/arch/m68k/mac/misc.c
> +++ b/arch/m68k/mac/misc.c
> @@ -410,9 +410,8 @@ void mac_poweroff(void)
>
>  void mac_reset(void)
>  {
> -       if (macintosh_config->adb_type == MAC_ADB_II) {
> -               unsigned long flags;
> -
> +       if (macintosh_config->adb_type == MAC_ADB_II &&
> +           macintosh_config->ident != MAC_MODEL_SE30) {
>                 /* need ROMBASE in booter */
>                 /* indeed, plus need to MAP THE ROM !! */
>
> @@ -422,17 +421,8 @@ void mac_reset(void)
>                 /* works on some */
>                 rom_reset = (void *) (mac_bi_data.rombase + 0xa);
>
> -               if (macintosh_config->ident == MAC_MODEL_SE30) {
> -                       /*
> -                        * MSch: Machines known to crash on ROM reset ...
> -                        */
> -               } else {
> -                       local_irq_save(flags);
> -
> -                       rom_reset();
> -
> -                       local_irq_restore(flags);

I guess you removed the call to local_irq_restore() because you never
get there anyway?

> -               }
> +               local_irq_disable();
> +               rom_reset();
>  #ifdef CONFIG_ADB_CUDA
>         } else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
>                    macintosh_config->adb_type == MAC_ADB_CUDA) {

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds