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authorPaul Mundt <lethal@linux-sh.org>2011-01-07 10:51:35 +0900
committerPaul Mundt <lethal@linux-sh.org>2011-01-07 10:51:35 +0900
commite9d728f528f9548c8dd013899b23e662fa7b6bca (patch)
treed88a5df6e5a2b33ebe088ad0223fe54679a59df3 /arch/arm
parent018a3fc7e3824ffcc80ad0160f9782c7d577c0c1 (diff)
parent6155f77d09b968f591876f368d4843168910449e (diff)
downloadop-kernel-dev-e9d728f528f9548c8dd013899b23e662fa7b6bca.zip
op-kernel-dev-e9d728f528f9548c8dd013899b23e662fa7b6bca.tar.gz
Merge branch 'rmobile/smp' into rmobile-latest
Conflicts: arch/arm/Kconfig arch/arm/mach-shmobile/include/mach/entry-macro-intc.S Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/Kconfig2
-rw-r--r--arch/arm/mach-shmobile/Makefile7
-rw-r--r--arch/arm/mach-shmobile/headsmp.S27
-rw-r--r--arch/arm/mach-shmobile/hotplug.c41
-rw-r--r--arch/arm/mach-shmobile/include/mach/common.h6
-rw-r--r--arch/arm/mach-shmobile/include/mach/smp.h16
-rw-r--r--arch/arm/mach-shmobile/localtimer.c25
-rw-r--r--arch/arm/mach-shmobile/platsmp.c85
-rw-r--r--arch/arm/mach-shmobile/smp-sh73a0.c97
9 files changed, 305 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7daab42..e2f8011 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1258,7 +1258,7 @@ config SMP
depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
- ARCH_MSM_SCORPIONMP
+ ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
select USE_GENERIC_SMP_HELPERS
select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
help
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index d16165a..e2507f6 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -11,6 +11,12 @@ obj-$(CONFIG_ARCH_SH7377) += setup-sh7377.o clock-sh7377.o intc-sh7377.o
obj-$(CONFIG_ARCH_SH7372) += setup-sh7372.o clock-sh7372.o intc-sh7372.o
obj-$(CONFIG_ARCH_SH73A0) += setup-sh73a0.o clock-sh73a0.o intc-sh73a0.o
+# SMP objects
+smp-y := platsmp.o headsmp.o
+smp-$(CONFIG_HOTPLUG_CPU) += hotplug.o
+smp-$(CONFIG_LOCAL_TIMERS) += localtimer.o
+smp-$(CONFIG_ARCH_SH73A0) += smp-sh73a0.o
+
# Pinmux setup
pfc-y :=
pfc-$(CONFIG_ARCH_SH7367) += pfc-sh7367.o
@@ -32,4 +38,5 @@ obj-$(CONFIG_MACH_AG5EVM) += board-ag5evm.o
obj-$(CONFIG_MACH_MACKEREL) += board-mackerel.o
# Framework support
+obj-$(CONFIG_SMP) += $(smp-y)
obj-$(CONFIG_GENERIC_GPIO) += $(pfc-y)
diff --git a/arch/arm/mach-shmobile/headsmp.S b/arch/arm/mach-shmobile/headsmp.S
new file mode 100644
index 0000000..d4cec6b
--- /dev/null
+++ b/arch/arm/mach-shmobile/headsmp.S
@@ -0,0 +1,27 @@
+/*
+ * SMP support for R-Mobile / SH-Mobile
+ *
+ * Copyright (C) 2010 Magnus Damm
+ * Copyright (C) 2010 Takashi Yoshii
+ *
+ * Based on vexpress, Copyright (c) 2003 ARM Limited, All Rights Reserved
+ *
+ * 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/linkage.h>
+#include <linux/init.h>
+#include <asm/memory.h>
+
+ __INIT
+
+/*
+ * Reset vector for secondary CPUs.
+ * This will be mapped at address 0 by SBAR register.
+ * We need _long_ jump to the physical address.
+ */
+ .align 12
+ENTRY(shmobile_secondary_vector)
+ ldr pc, 1f
+1: .long secondary_startup - PAGE_OFFSET + PHYS_OFFSET
diff --git a/arch/arm/mach-shmobile/hotplug.c b/arch/arm/mach-shmobile/hotplug.c
new file mode 100644
index 0000000..238a0d9
--- /dev/null
+++ b/arch/arm/mach-shmobile/hotplug.c
@@ -0,0 +1,41 @@
+/*
+ * SMP support for R-Mobile / SH-Mobile
+ *
+ * Copyright (C) 2010 Magnus Damm
+ *
+ * Based on realview, Copyright (C) 2002 ARM Ltd, All Rights Reserved
+ *
+ * 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/kernel.h>
+#include <linux/errno.h>
+#include <linux/smp.h>
+
+int platform_cpu_kill(unsigned int cpu)
+{
+ return 1;
+}
+
+void platform_cpu_die(unsigned int cpu)
+{
+ while (1) {
+ /*
+ * here's the WFI
+ */
+ asm(".word 0xe320f003\n"
+ :
+ :
+ : "memory", "cc");
+ }
+}
+
+int platform_cpu_disable(unsigned int cpu)
+{
+ /*
+ * we don't allow CPU 0 to be shutdown (it is still too special
+ * e.g. clock tick interrupts)
+ */
+ return cpu == 0 ? -EPERM : 0;
+}
diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h
index 9f46cf5..013ac0e 100644
--- a/arch/arm/mach-shmobile/include/mach/common.h
+++ b/arch/arm/mach-shmobile/include/mach/common.h
@@ -3,6 +3,7 @@
extern struct sys_timer shmobile_timer;
extern void shmobile_setup_console(void);
+extern void shmobile_secondary_vector(void);
struct clk;
extern int clk_init(void);
extern void shmobile_handle_irq_intc(struct pt_regs *);
@@ -40,4 +41,9 @@ extern void sh73a0_pinmux_init(void);
extern struct clk sh73a0_extal1_clk;
extern struct clk sh73a0_extal2_clk;
+extern unsigned int sh73a0_get_core_count(void);
+extern void sh73a0_secondary_init(unsigned int cpu);
+extern int sh73a0_boot_secondary(unsigned int cpu);
+extern void sh73a0_smp_prepare_cpus(void);
+
#endif /* __ARCH_MACH_COMMON_H */
diff --git a/arch/arm/mach-shmobile/include/mach/smp.h b/arch/arm/mach-shmobile/include/mach/smp.h
new file mode 100644
index 0000000..f4a35ff
--- /dev/null
+++ b/arch/arm/mach-shmobile/include/mach/smp.h
@@ -0,0 +1,16 @@
+#ifndef __MACH_SMP_H
+#define __MACH_SMP_H
+
+#include <asm/hardware/gic.h>
+#include <asm/smp_mpidr.h>
+
+/*
+ * We use IRQ1 as the IPI
+ */
+static inline void smp_cross_call(const struct cpumask *mask)
+{
+#if defined(CONFIG_ARM_GIC)
+ gic_raise_softirq(mask, 1);
+#endif
+}
+#endif
diff --git a/arch/arm/mach-shmobile/localtimer.c b/arch/arm/mach-shmobile/localtimer.c
new file mode 100644
index 0000000..2111c28
--- /dev/null
+++ b/arch/arm/mach-shmobile/localtimer.c
@@ -0,0 +1,25 @@
+/*
+ * SMP support for R-Mobile / SH-Mobile - local timer portion
+ *
+ * Copyright (C) 2010 Magnus Damm
+ *
+ * Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved
+ *
+ * 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/smp.h>
+#include <linux/clockchips.h>
+#include <asm/smp_twd.h>
+#include <asm/localtimer.h>
+
+/*
+ * Setup the local clock events for a CPU.
+ */
+void __cpuinit local_timer_setup(struct clock_event_device *evt)
+{
+ evt->irq = 29;
+ twd_timer_setup(evt);
+}
diff --git a/arch/arm/mach-shmobile/platsmp.c b/arch/arm/mach-shmobile/platsmp.c
new file mode 100644
index 0000000..3c2c0f4
--- /dev/null
+++ b/arch/arm/mach-shmobile/platsmp.c
@@ -0,0 +1,85 @@
+/*
+ * SMP support for R-Mobile / SH-Mobile
+ *
+ * Copyright (C) 2010 Magnus Damm
+ *
+ * Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved
+ *
+ * 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/errno.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <asm/localtimer.h>
+#include <asm/mach-types.h>
+#include <mach/common.h>
+
+static unsigned int __init shmobile_smp_get_core_count(void)
+{
+ if (machine_is_ag5evm())
+ return sh73a0_get_core_count();
+
+ return 1;
+}
+
+static void __init shmobile_smp_prepare_cpus(void)
+{
+ if (machine_is_ag5evm())
+ sh73a0_smp_prepare_cpus();
+}
+
+
+void __cpuinit platform_secondary_init(unsigned int cpu)
+{
+ trace_hardirqs_off();
+
+ if (machine_is_ag5evm())
+ sh73a0_secondary_init(cpu);
+}
+
+int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ if (machine_is_ag5evm())
+ return sh73a0_boot_secondary(cpu);
+
+ return -ENOSYS;
+}
+
+void __init smp_init_cpus(void)
+{
+ unsigned int ncores = shmobile_smp_get_core_count();
+ unsigned int i;
+
+ for (i = 0; i < ncores; i++)
+ set_cpu_possible(i, true);
+}
+
+void __init smp_prepare_cpus(unsigned int max_cpus)
+{
+ unsigned int ncores = shmobile_smp_get_core_count();
+ unsigned int cpu = smp_processor_id();
+ int i;
+
+ smp_store_cpu_info(cpu);
+
+ if (max_cpus > ncores)
+ max_cpus = ncores;
+
+ for (i = 0; i < max_cpus; i++)
+ set_cpu_present(i, true);
+
+ if (max_cpus > 1) {
+ shmobile_smp_prepare_cpus();
+
+ /*
+ * Enable the local timer or broadcast device for the
+ * boot CPU, but only if we have more than one CPU.
+ */
+ percpu_timer_setup();
+ }
+}
diff --git a/arch/arm/mach-shmobile/smp-sh73a0.c b/arch/arm/mach-shmobile/smp-sh73a0.c
new file mode 100644
index 0000000..4e71fd4
--- /dev/null
+++ b/arch/arm/mach-shmobile/smp-sh73a0.c
@@ -0,0 +1,97 @@
+/*
+ * SMP support for R-Mobile / SH-Mobile - sh73a0 portion
+ *
+ * Copyright (C) 2010 Magnus Damm
+ * Copyright (C) 2010 Takashi Yoshii
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <mach/common.h>
+#include <asm/smp_scu.h>
+#include <asm/smp_twd.h>
+#include <asm/hardware/gic.h>
+
+#define WUPCR 0xe6151010
+#define SRESCR 0xe6151018
+#define PSTR 0xe6151040
+#define SBAR 0xe6180020
+#define APARMBAREA 0xe6f10020
+
+static void __iomem *scu_base_addr(void)
+{
+ return (void __iomem *)0xf0000000;
+}
+
+static DEFINE_SPINLOCK(scu_lock);
+static unsigned long tmp;
+
+static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
+{
+ void __iomem *scu_base = scu_base_addr();
+
+ spin_lock(&scu_lock);
+ tmp = __raw_readl(scu_base + 8);
+ tmp &= ~clr;
+ tmp |= set;
+ spin_unlock(&scu_lock);
+
+ /* disable cache coherency after releasing the lock */
+ __raw_writel(tmp, scu_base + 8);
+}
+
+unsigned int __init sh73a0_get_core_count(void)
+{
+ void __iomem *scu_base = scu_base_addr();
+
+ return scu_get_core_count(scu_base);
+}
+
+void __cpuinit sh73a0_secondary_init(unsigned int cpu)
+{
+ gic_cpu_init(0, __io(0xf0000100));
+}
+
+int __cpuinit sh73a0_boot_secondary(unsigned int cpu)
+{
+ /* enable cache coherency */
+ modify_scu_cpu_psr(0, 3 << (cpu * 8));
+
+ if (((__raw_readw(__io(PSTR)) >> (4 * cpu)) & 3) == 3)
+ __raw_writel(1 << cpu, __io(WUPCR)); /* wake up */
+ else
+ __raw_writel(1 << cpu, __io(SRESCR)); /* reset */
+
+ return 0;
+}
+
+void __init sh73a0_smp_prepare_cpus(void)
+{
+#ifdef CONFIG_HAVE_ARM_TWD
+ twd_base = (void __iomem *)0xf0000600;
+#endif
+
+ scu_enable(scu_base_addr());
+
+ /* Map the reset vector (in headsmp.S) */
+ __raw_writel(0, __io(APARMBAREA)); /* 4k */
+ __raw_writel(__pa(shmobile_secondary_vector), __io(SBAR));
+
+ /* enable cache coherency on CPU0 */
+ modify_scu_cpu_psr(0, 3 << (0 * 8));
+}
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