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From: Finn Thain <>
To: Benjamin Herrenschmidt <>
Cc: Michael Schmitz <>,
	Andreas Schwab <>,,,,
	Geert Uytterhoeven <>,
	Laurent Vivier <>
Subject: Re: [PATCH v2 08/12] macintosh/via-pmu68k: Don't load driver on unsupported hardware
Date: Tue, 12 Jun 2018 09:47:06 +1000 (AEST)	[thread overview]
Message-ID: <alpine.LNX.2.21.1806120911370.34@nippy.intranet> (raw)
In-Reply-To: <>

On Sun, 10 Jun 2018, Benjamin Herrenschmidt wrote:

> Pre-PCI is basically "NUBUS" based even in absence of an actual NuBus 
> slot :-) It has to do with the internal HW architecture. The only ones 
> that aren't are the even older designs (the 68000 based ones).

There is already some disagreement in the comments in the nubus-pmac code 
about the suitability of "PMU_NUBUS_BASED" as opposed to e.g. 

Point is, the PMU driver doesn't care about the expansion slots or 
architecture (Whitney-based PMU appears on m68k and powerpc). So NuBus vs. 
PCI is a red herring here. The pmu_kind relates to backlight, buttons and 

(Leaving aside the PMU driver, if a pre-OpenFirmware Mac has a "slot zero" 
ROM, one can argue that it is actually a NuBus machine, regardless of any 
actual expansion slots.)

> What's the situation with those NuBus things ? What do they use as a 
> bootloader ? The old Apple one or BootX ? We should merge that port of 
> it's maintained.

I agree that this code should not languish out-of-tree. But it would need 
more work before it could reasonably be submitted to reviewers.

I do have some nubus-pmac hardware but I also have more mac/68k driver 
work to do before I can tackle another architecture.

I don't know what the bootloader situation is, but it looks messy...

Laurent, does Emile work on these machines?


> Cheers,
> Ben.

  reply	other threads:[~2018-06-11 23:47 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <>
     [not found] ` <>
     [not found]   ` <>
     [not found]     ` <>
     [not found]       ` <>
     [not found]         ` <alpine.LNX.2.21.1806092140410.26@nippy.intranet>
2018-06-10  6:55           ` [PATCH v2 08/12] macintosh/via-pmu68k: Don't load driver on unsupported hardware Benjamin Herrenschmidt
2018-06-11 23:47             ` Finn Thain [this message]
2018-06-12  6:53               ` Laurent Vivier
2018-06-12 20:12                 ` Michael Schmitz
     [not found]           ` <>
     [not found]             ` <>
2018-06-11  0:05               ` Benjamin Herrenschmidt
2018-06-11  1:45                 ` Michael Schmitz

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