linux-kernel - Re: [PATCH 5/7] ARM: mediatek: add smp bringup code

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Message-ID: <CABuKBeLbyzHfDqfdTh4Nh1ymg3=evKoQenLQ=VKhUkj55gGdVw@mail.gmail.com>
Date:	Wed, 6 May 2015 10:38:21 +0200
From:	Matthias Brugger <matthias.bgg@...il.com>
To:	Yingjoe Chen <yingjoe.chen@...iatek.com>
Cc:	Mark Rutland <mark.rutland@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Russell King <linux@....linux.org.uk>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Jason Cooper <jason@...edaemon.net>,
	Catalin Marinas <catalin.marinas@....com>,
	Marc Carino <marc.ceeeee@...il.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-mediatek@...ts.infradead.org,
	srv_heupstream <srv_heupstream@...iatek.com>,
	Sascha Hauer <kernel@...gutronix.de>
Subject: Re: [PATCH 5/7] ARM: mediatek: add smp bringup code

2015-05-01 9:43 GMT+02:00 Yingjoe Chen <yingjoe.chen@...iatek.com>:
> Add support for booting secondary CPUs on mt6589, mt8127
> and mt8135.
>
> Signed-off-by: Yingjoe Chen <yingjoe.chen@...iatek.com>
> ---
>  arch/arm/mach-mediatek/Makefile  |   3 +
>  arch/arm/mach-mediatek/platsmp.c | 145 +++++++++++++++++++++++++++++++++++++++
>  2 files changed, 148 insertions(+)
>  create mode 100644 arch/arm/mach-mediatek/platsmp.c
>
> diff --git a/arch/arm/mach-mediatek/Makefile b/arch/arm/mach-mediatek/Makefile
> index 43e619f..2116460 100644
> --- a/arch/arm/mach-mediatek/Makefile
> +++ b/arch/arm/mach-mediatek/Makefile
> @@ -1 +1,4 @@
> +ifeq ($(CONFIG_SMP),y)
> +obj-$(CONFIG_ARCH_MEDIATEK) += platsmp.o
> +endif
>  obj-$(CONFIG_ARCH_MEDIATEK) += mediatek.o
> diff --git a/arch/arm/mach-mediatek/platsmp.c b/arch/arm/mach-mediatek/platsmp.c
> new file mode 100644
> index 0000000..e266b3d
> --- /dev/null
> +++ b/arch/arm/mach-mediatek/platsmp.c
> @@ -0,0 +1,145 @@
> +/*
> + * arch/arm/mach-mediatek/platsmp.c
> + *
> + * Copyright (c) 2014 Mediatek Inc.
> + * Author: Shunli Wang <shunli.wang@...iatek.com>
> + *         Yingjoe Chen <yingjoe.chen@...iatek.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + */
> +#include <linux/io.h>
> +#include <linux/memblock.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/string.h>
> +#include <linux/threads.h>
> +
> +#define MTK_MAX_CPU            8
> +#define MTK_SMP_REG_SIZE       0x1000
> +
> +struct mtk_smp_boot_info {
> +       unsigned long smp_base;
> +       unsigned int jump_reg;
> +       unsigned int boot_reg;

This variable is not used, right?

> +       unsigned int core_keys[MTK_MAX_CPU - 1];
> +       unsigned int core_regs[MTK_MAX_CPU - 1];
> +};
> +
> +static const struct mtk_smp_boot_info mtk_mt8135_tz_boot = {
> +       0x80002000, 1020, 1012,
> +       { 0x534c4131, 0x4c415332, 0x41534c33 },
> +       { 1016, 1016, 1016},

Please convert to hex values.

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