linux-kernel - Re: [PATCH 1/6] ARM: stm32: prepare stm32 family to welcome armv7 architecture

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Message-ID: <CACRpkdaKZk5N9F=_nYSzKWyXgW4xQ9Ltft7-UNM+a-nOpqq2xg@mail.gmail.com>
Date:   Mon, 11 Dec 2017 11:25:09 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Ludovic Barre <ludovic.Barre@...com>
Cc:     Russell King <linux@...linux.org.uk>,
        Rob Herring <robh+dt@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH 1/6] ARM: stm32: prepare stm32 family to welcome armv7 architecture

On Fri, Dec 8, 2017 at 3:11 PM, Ludovic Barre <ludovic.Barre@...com> wrote:

> From: Ludovic Barre <ludovic.barre@...com>
>
> This patch prepares the STM32 machine for the integration of Cortex-A
> based microprocessor (MPU), on top of the existing Cortex-M
> microcontroller family (MCU). Since both MCUs and MPUs are sharing
> common hardware blocks we can keep using ARCH_STM32 flag for most of
> them. If a hardware block is specific to one family we can use either
> ARCH_STM32_MCU or ARCH_STM32_MPU flag.
>
> Signed-off-by: Ludovic Barre <ludovic.barre@...com>

So yesterdays application processors are todays MCU processors.

I said this on a lecture for control systems a while back and
stated it as a reason I think RTOSes are not really seeing a bright
future compared to Linux.

It happened quicker than I thought though, interesting.

Yours,
Linus Walleij