From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/4] ARM: Alpine: smp support
Date: Mon, 26 Jan 2015 11:44:58 +0000 [thread overview]
Message-ID: <20150126114458.GC23313@leverpostej> (raw)
In-Reply-To: <54c53660.F+mWFCmG+/oPpFS5%tsahee@annapurnalabs.com>
On Sun, Jan 25, 2015 at 06:30:56PM +0000, Tsahee Zidenberg wrote:
> This patch introduces support for waking up secondary CPU cores on
> Alpine platform.
>
> Signed-off-by: Barak Wasserstrom <barak@annapurnalabs.com>
> Signed-off-by: Tsahee Zidenberg <tsahee@annapurnalabs.com>
> ---
> arch/arm/mach-alpine/Kconfig | 1 +
> arch/arm/mach-alpine/Makefile | 1 +
> arch/arm/mach-alpine/alpine_cpu_pm.c | 68 ++++++++++++++++++++++++++++++++
> arch/arm/mach-alpine/alpine_cpu_pm.h | 26 ++++++++++++
> arch/arm/mach-alpine/alpine_cpu_resume.h | 38 ++++++++++++++++++
> arch/arm/mach-alpine/platsmp.c | 48 ++++++++++++++++++++++
> 6 files changed, 182 insertions(+)
> create mode 100644 arch/arm/mach-alpine/alpine_cpu_pm.c
> create mode 100644 arch/arm/mach-alpine/alpine_cpu_pm.h
> create mode 100644 arch/arm/mach-alpine/alpine_cpu_resume.h
> create mode 100644 arch/arm/mach-alpine/platsmp.c
[...]
> +/* NB registers */
> +#define AL_SYSFAB_POWER_CONTROL_OFFSET(cpu) (0x2000 + (cpu)*0x100 + 0x20)
> +
> +static void __iomem *al_sysfabric_service_base;
> +static struct al_cpu_resume_regs __iomem *al_cpu_resume_regs;
> +static int wakeup_supported;
> +
> +int alpine_cpu_wakeup(unsigned int cpu, uint32_t phys_resume_addr)
> +{
> + if (!wakeup_supported)
> + return -ENOSYS;
> +
> + /* Set CPU resume address */
> + writel(phys_resume_addr, &al_cpu_resume_regs->per_cpu[cpu].resume_addr);
> +
> + /* Power-up the CPU */
> + writel(0, (al_sysfabric_service_base + AL_SYSFAB_POWER_CONTROL_OFFSET(cpu)));
Surely you want to map from the logical ID to the physical ID first?
That caller didn't.
Mark.
prev parent reply other threads:[~2015-01-26 11:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-25 18:30 [PATCH 3/4] ARM: Alpine: smp support Tsahee Zidenberg
2015-01-26 11:08 ` Arnd Bergmann
2015-01-26 11:44 ` Mark Rutland [this message]
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