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From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Michael Schmitz <schmitzmic@gmail.com>
Cc: "Linux/m68k" <linux-m68k@vger.kernel.org>,
	linux-ide@vger.kernel.org, Finn Thain <fthain@linux-m68k.org>
Subject: Re: [PATCH RFC 1/2] m68k: io_mm.h: conditionalize ISA address translation on Atari
Date: Wed, 9 Jun 2021 08:35:38 +0200	[thread overview]
Message-ID: <CAMuHMdWD-iECGSE5N+hUK-EdCTzMvhhgjRifih6sdx-NbOem1g@mail.gmail.com> (raw)
In-Reply-To: <1622611267-15825-2-git-send-email-schmitzmic@gmail.com>

Hi Michael,

On Wed, Jun 2, 2021 at 7:21 AM Michael Schmitz <schmitzmic@gmail.com> wrote:
> Current io_mm.h uses address translation and ROM port IO primitives when
> port addresses are below 1024, and raw untranslated MMIO IO primitives
> else when CONFIG_ATARI_ROM_ISA is set. This is done regardless of the
> m68k machine type a multi-platform kernel runs on. As a consequence,
> the Q40 IDE driver in multiplatform kernels cannot work.
> Conversely, the Atari IDE driver uses wrong address translation if a
> multiplatform Q40 and Atari kernel does _not_ set CONFIG_ATARI_ROM_ISA.
>
> Replace MMIO by ISA IO primitives for addresses > 1024 (if isa_type
> is ISA_TYPE_ENEC), and change the ISA address translation used for
> Atari to a no-op for those addresses.
>
> Switch readb()/writeb() and readw()/writew() to their ISA equivalents
> also. Change the address translation functions to return the identity
> translation if CONFIG_ATARI_ROM_ISA is not defined, and set MULTI_ISA
> for kernels where Q40 and Atari are both configured so this can actually
> work (isa_type set to Q40 at compile time else).
>
> Signed-off-by: Michael Schmity <schmitzmic@gmail.com>

> --- a/arch/m68k/include/asm/io_mm.h
> +++ b/arch/m68k/include/asm/io_mm.h
> @@ -52,7 +52,11 @@
>  #define Q40_ISA_MEM_B(madr)  (q40_isa_mem_base+1+4*((unsigned long)(madr)))
>  #define Q40_ISA_MEM_W(madr)  (q40_isa_mem_base+  4*((unsigned long)(madr)))
>
> +#ifdef CONFIG_ATARI
> +#define MULTI_ISA 1
> +#else
>  #define MULTI_ISA 0
> +#endif /* Atari */
>  #endif /* Q40 */
>
>  #ifdef CONFIG_AMIGA_PCMCIA
> @@ -135,9 +139,12 @@ static inline u8 __iomem *isa_itb(unsigned long addr)
>      case ISA_TYPE_AG: return (u8 __iomem *)AG_ISA_IO_B(addr);
>  #endif
>  #ifdef CONFIG_ATARI_ROM_ISA
> -    case ISA_TYPE_ENEC: return (u8 __iomem *)ENEC_ISA_IO_B(addr);
> +    case ISA_TYPE_ENEC: if (addr < 1024)
> +                               return (u8 __iomem *)ENEC_ISA_IO_B(addr);
> +                       else
> +                               return (u8 __iomem *)(addr);

While putting a simple return on the same line as the case keyword,
please start the if statement on a new line.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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

  parent reply	other threads:[~2021-06-09  6:36 UTC|newest]

Thread overview: 86+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-25  9:06 [PATCH] m68k/mac: Replace macide driver with generic platform driver Finn Thain
2021-04-25 10:25 ` John Paul Adrian Glaubitz
2021-04-26  7:37   ` Finn Thain
2021-04-26  7:48     ` John Paul Adrian Glaubitz
2021-04-27  1:51     ` Michael Schmitz
2021-04-27  3:47       ` Finn Thain
2021-04-27 19:54         ` Michael Schmitz
2021-04-28  6:53           ` Geert Uytterhoeven
2021-06-01  3:32             ` Michael Schmitz
2021-06-01  7:55               ` Michael Schmitz
2021-06-01  8:43                 ` Geert Uytterhoeven
2021-06-01 21:05                   ` Michael Schmitz
2021-06-02  5:21                   ` [PATCH RFC 0/2] Fix m68k multiplatform ISA support Michael Schmitz
2021-06-02  5:21                     ` [PATCH RFC 1/2] m68k: io_mm.h: conditionalize ISA address translation on Atari Michael Schmitz
2021-06-03  8:23                       ` Finn Thain
2021-06-04  0:19                         ` Michael Schmitz
2021-06-04  5:55                           ` Finn Thain
2021-06-04  7:30                             ` Michael Schmitz
2021-06-04 22:49                               ` Brad Boyer
2021-06-05  1:41                                 ` Michael Schmitz
2021-06-05  6:04                                   ` Brad Boyer
2021-06-05 22:05                                     ` Michael Schmitz
2021-06-06  2:18                                     ` Michael Schmitz
2021-06-06  4:53                                       ` Finn Thain
2021-06-06  5:42                                         ` Michael Schmitz
2021-06-06 23:51                                           ` Brad Boyer
2021-06-06  5:54                                     ` [PATCH RFC 0/2] Add APNE PCMCIA 100 Mbit support Michael Schmitz
2021-06-06  5:54                                       ` [PATCH RFC 1/2] m68k: io_mm.h - add APNE 100 MBit support Michael Schmitz
2021-06-07  8:01                                         ` Geert Uytterhoeven
2021-06-07  8:20                                           ` Michael Schmitz
2021-06-07 11:15                                         ` Geert Uytterhoeven
2021-06-07 19:57                                           ` Michael Schmitz
2021-06-08  6:42                                             ` Geert Uytterhoeven
2021-06-08 21:55                                               ` Michael Schmitz
2021-06-09  6:33                                                 ` Geert Uytterhoeven
2021-06-08 21:56                                               ` Michael Schmitz
2021-06-06  5:54                                       ` [PATCH RFC 2/2] net/8390: apne.c - add 100 Mbit support to apne.c driver Michael Schmitz
2021-06-06 12:42                                         ` kernel test robot
2021-06-07  8:08                                         ` Geert Uytterhoeven
2021-06-07  8:40                                           ` Michael Schmitz
2021-06-07  8:46                                             ` ALeX Kazik
2021-06-08  3:10                                               ` Michael Schmitz
2021-06-07  8:37                                         ` Geert Uytterhoeven
2021-06-07 12:56                                         ` Geert Uytterhoeven
2021-06-13 21:53                                           ` Michael Schmitz
2021-06-09  7:36                                       ` [PATCH v1 0/2] Add APNE PCMCIA 100 Mbit support Michael Schmitz
2021-06-09  7:36                                         ` [PATCH v1 1/2] m68k: io_mm.h - add APNE 100 MBit support Michael Schmitz
2021-06-09  8:04                                           ` Andreas Schwab
2021-06-09 21:54                                             ` Michael Schmitz
2021-06-10  1:09                                               ` Finn Thain
2021-06-10  7:32                                                 ` Geert Uytterhoeven
2021-06-11  2:15                                                   ` Michael Schmitz
2021-06-10  8:53                                               ` Andreas Schwab
2021-06-09  7:36                                         ` [PATCH v1 2/2] net/8390: apne.c - add 100 Mbit support to apne.c driver Michael Schmitz
2021-06-10  2:09                                         ` [PATCH v2 0/2] Add APNE PCMCIA 100 Mbit support Michael Schmitz
2021-06-10  2:09                                           ` [PATCH v2 1/2] m68k: io_mm.h - add APNE 100 MBit support Michael Schmitz
2021-06-10  2:09                                           ` [PATCH v2 2/2] net/8390: apne.c - add 100 Mbit support to apne.c driver Michael Schmitz
2021-06-16 21:11                                           ` [PATCH v2 0/2] Add APNE PCMCIA 100 Mbit support ALeX Kazik
2021-06-17  1:10                                             ` Michael Schmitz
2021-06-04  7:54                           ` [PATCH RFC 1/2] m68k: io_mm.h: conditionalize ISA address translation on Atari Geert Uytterhoeven
2021-06-04 21:36                             ` Michael Schmitz
2021-06-04 23:31                               ` Finn Thain
2021-06-05  0:24                                 ` Finn Thain
2021-06-05  3:48                                 ` Michael Schmitz
2021-06-09  6:35                       ` Geert Uytterhoeven [this message]
2021-06-09  7:20                         ` Michael Schmitz
2021-06-02  5:21                     ` [PATCH RFC 2/2] m68k: setup_mm.c: set isa_sex for Atari if ATARI_ROM_ISA not used Michael Schmitz
2021-06-02  7:09                       ` Geert Uytterhoeven
2021-06-02  8:21                         ` Michael Schmitz
2021-06-03  8:29                           ` Finn Thain
2021-06-04  3:02                             ` Michael Schmitz
2021-06-03  3:43                     ` [PATCH RFC 0/2] Fix m68k multiplatform ISA support Michael Schmitz
2021-06-03  7:09                       ` Geert Uytterhoeven
2021-06-04  0:22                         ` Michael Schmitz
2021-06-06  5:28                     ` [PATCH] m68k: Fix " Michael Schmitz
2021-06-07  7:49                       ` Geert Uytterhoeven
2021-06-07  8:17                         ` Michael Schmitz
2021-06-09  7:22                       ` [PATCH v2] m68k: io_mm.h: conditionalize ISA address translation on Atari Michael Schmitz
2021-06-09  7:57                         ` Andreas Schwab
2021-06-09 21:43                           ` Michael Schmitz
2021-06-10  2:04                         ` [PATCH v3] " Michael Schmitz
2021-04-27  8:11       ` [PATCH] m68k/mac: Replace macide driver with generic platform driver Sergei Shtylyov
2021-04-27  8:36         ` John Paul Adrian Glaubitz
2021-04-27 19:29         ` Michael Schmitz
2021-04-25 22:24 ` Michael Schmitz
2021-04-26  7:35   ` Finn Thain

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