From: Nicholas Piggin <npiggin@gmail.com>
To: Alistair Popple <alistair@popple.id.au>, linuxppc-dev@lists.ozlabs.org
Cc: linuxppc-dev@ozlabs.org, Michael Neuling <mikey@neuling.org>,
Benjamin Herrenschmidt <benh@ozlabs.org>
Subject: Re: [PATCH RFC 2/4] powerpc: Add Microwatt platform
Date: Sat, 09 May 2020 19:10:39 +1000 [thread overview]
Message-ID: <1589015352.vol2thm3ae.astroid@bobo.none> (raw)
In-Reply-To: <2771261.oJVn4HZnso@townsend>
Excerpts from Alistair Popple's message of May 9, 2020 6:36 pm:
> On Saturday, 9 May 2020 5:58:57 PM AEST Nicholas Piggin wrote:
>> Excerpts from Paul Mackerras's message of May 9, 2020 3:02 pm:
>> > Microwatt is a FPGA-based implementation of the Power ISA. It
>> > currently only implements little-endian 64-bit mode, and does
>> > not (yet) support SMP.
>> >
>> > This adds a new machine type to support FPGA-based SoCs with a
>> > Microwatt core.
>>
>> Very cool!
>>
>> Would there be any point sharing this with the "naked metal" platform
>> Alistair has for booting POWER in L3 without OPAL? Or is it easy enough
>> to have a several different simple 64s platforms?
>
> It looks pretty similar at the moment, I've been meaning to clean those
> patches up and send them upstream but Paul has beaten me to it. The main
> difference so far is how the console is setup. For booting cache contained I
> was using a device tree pointing at a standard UART driver and enabling the
> standard OF platform device tree probing.
Well I'd only merge them if you think it makes sense. If the platform is
a perfectly good abstraction for the differences and merging them would
just result in painful special cases it wouldn't be worthwhile. It's
clearly not a lot of code.
Thanks,
Nick
next prev parent reply other threads:[~2020-05-09 9:12 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-09 5:01 [PATCH RFC 0/4] Add support for Microwatt-based SoCs Paul Mackerras
2020-05-09 5:02 ` [PATCH RFC 1/4] powerpc/radix: Fix compilation for radix with CONFIG_SMP=n Paul Mackerras
2020-05-09 7:52 ` Nicholas Piggin
2020-05-14 8:26 ` Joel Stanley
2020-05-09 5:02 ` [PATCH RFC 2/4] powerpc: Add Microwatt platform Paul Mackerras
2020-05-09 7:58 ` Nicholas Piggin
2020-05-09 8:36 ` Alistair Popple
2020-05-09 9:10 ` Nicholas Piggin [this message]
2020-05-12 1:56 ` Michael Ellerman
2020-05-09 5:03 ` [PATCH RFC 3/4] powerpc/microwatt: Add early debug UART support for Microwatt Paul Mackerras
2020-05-11 7:07 ` Segher Boessenkool
2020-05-12 1:57 ` Michael Ellerman
2020-05-09 5:04 ` [PATCH RFC 4/4] powerpc/radix: Add support for microwatt's PRTBL SPR Paul Mackerras
2020-05-09 8:02 ` Nicholas Piggin
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