diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/Makefile | 7 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/headsmp.S | 27 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/hotplug.c | 41 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/common.h | 6 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/smp.h | 16 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/localtimer.c | 25 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/platsmp.c | 85 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/smp-sh73a0.c | 97 |
9 files changed, 305 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 7daab42eb54f..e2f801167593 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 d16165a7b487..e2507f66f9d5 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 000000000000..d4cec6b4c7d9 --- /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 000000000000..238a0d97d2d5 --- /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 9f46cf5ca75f..013ac0ee8256 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 000000000000..f4a35ff82c67 --- /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 000000000000..2111c28b724e --- /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 000000000000..3c2c0f49073e --- /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 000000000000..4e71fd416cd5 --- /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)); +} |
