From: Magnus Damm <magnus.damm@gmail.com>
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 01/07] ARM: shmobile: Introduce shared SCU SMP boot code
Date: Wed, 31 Jul 2013 07:07:12 +0000 [thread overview]
Message-ID: <20130731070712.14444.49956.sendpatchset@w520> (raw)
In-Reply-To: <20130731070702.14444.64961.sendpatchset@w520>
From: Magnus Damm <damm@opensource.se>
Add SMP boot functions for SCU equipped mach-shmobile SoCs.
At this point shmobile_smp_scu_prepare_cpus() controls the SCU and
installs boot fn and arg, while shmobile_smp_scu_boot_secondary()
currently does nothing. In the future the boot function and arg
install code will be reworked, so the empty function is ground
work for that.
Signed-off-by: Magnus Damm <damm@opensource.se>
---
arch/arm/mach-shmobile/include/mach/common.h | 3 ++
arch/arm/mach-shmobile/platsmp-scu.c | 31 ++++++++++++++++++++++++++
2 files changed, 34 insertions(+)
--- 0001/arch/arm/mach-shmobile/include/mach/common.h
+++ work/arch/arm/mach-shmobile/include/mach/common.h 2013-07-29 16:50:17.000000000 +0900
@@ -11,6 +11,9 @@ extern void shmobile_boot_vector(void);
extern unsigned long shmobile_boot_fn;
extern unsigned long shmobile_boot_arg;
extern void shmobile_boot_scu(void);
+extern void shmobile_smp_scu_prepare_cpus(unsigned int max_cpus);
+extern int shmobile_smp_scu_boot_secondary(unsigned int cpu,
+ struct task_struct *idle);
struct clk;
extern int shmobile_clk_init(void);
extern void shmobile_handle_irq_intc(struct pt_regs *);
--- /dev/null
+++ work/arch/arm/mach-shmobile/platsmp-scu.c 2013-07-29 21:39:30.000000000 +0900
@@ -0,0 +1,31 @@
+/*
+ * SMP support for SoCs with SCU covered by mach-shmobile
+ *
+ * Copyright (C) 2013 Magnus Damm
+ *
+ * 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.
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/smp.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+#include <mach/common.h>
+
+void __init shmobile_smp_scu_prepare_cpus(unsigned int max_cpus)
+{
+ shmobile_boot_fn = virt_to_phys(shmobile_boot_scu);
+ shmobile_boot_arg = (unsigned long)shmobile_scu_base;
+
+ /* enable SCU and cache coherency on booting CPU */
+ scu_enable(shmobile_scu_base);
+ scu_power_mode(shmobile_scu_base, SCU_PM_NORMAL);
+}
+
+int shmobile_smp_scu_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ /* do nothing for now */
+ return 0;
+}
next prev parent reply other threads:[~2013-07-31 7:07 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-31 7:07 [PATCH 00/07] ARM: shmobile: sh73a0, r8a7779 and emev2 SMP SCU rework Magnus Damm
2013-07-31 7:07 ` Magnus Damm [this message]
2013-07-31 7:07 ` [PATCH 02/07] ARM: shmobile: Use shared SCU SMP boot code on sh73a0 Magnus Damm
2013-07-31 7:07 ` [PATCH 03/07] ARM: shmobile: Use shared SCU SMP boot code on r8a7779 Magnus Damm
2013-07-31 7:07 ` [PATCH 04/07] ARM: shmobile: Use shared SCU SMP boot code on emev2 Magnus Damm
2013-07-31 7:07 ` [PATCH 05/07] ARM: shmobile: Add shared SCU CPU Hotplug code Magnus Damm
2013-07-31 7:07 ` [PATCH 06/07] ARM: shmobile: Use shared SCU CPU Hotplug code on sh73a0 Magnus Damm
2013-07-31 7:08 ` [PATCH 07/07] ARM: shmobile: Use shared SCU CPU Hotplug code on r8a7779 Magnus Damm
2013-08-01 7:34 ` [PATCH 00/07] ARM: shmobile: sh73a0, r8a7779 and emev2 SMP SCU rework Simon Horman
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