forked from Minki/linux
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>
This commit is contained in:
Paul Mundt
commit
e9d728f528
@ -1258,7 +1258,7 @@ config SMP
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depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
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MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
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ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
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ARCH_MSM_SCORPIONMP
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ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
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select USE_GENERIC_SMP_HELPERS
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select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
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help
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@ -11,6 +11,12 @@ obj-$(CONFIG_ARCH_SH7377) += setup-sh7377.o clock-sh7377.o intc-sh7377.o
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obj-$(CONFIG_ARCH_SH7372) += setup-sh7372.o clock-sh7372.o intc-sh7372.o
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obj-$(CONFIG_ARCH_SH73A0) += setup-sh73a0.o clock-sh73a0.o intc-sh73a0.o
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# SMP objects
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smp-y := platsmp.o headsmp.o
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smp-$(CONFIG_HOTPLUG_CPU) += hotplug.o
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smp-$(CONFIG_LOCAL_TIMERS) += localtimer.o
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smp-$(CONFIG_ARCH_SH73A0) += smp-sh73a0.o
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# Pinmux setup
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pfc-y :=
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pfc-$(CONFIG_ARCH_SH7367) += pfc-sh7367.o
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@ -32,4 +38,5 @@ obj-$(CONFIG_MACH_AG5EVM) += board-ag5evm.o
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obj-$(CONFIG_MACH_MACKEREL) += board-mackerel.o
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# Framework support
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obj-$(CONFIG_SMP) += $(smp-y)
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obj-$(CONFIG_GENERIC_GPIO) += $(pfc-y)
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27
arch/arm/mach-shmobile/headsmp.S
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27
arch/arm/mach-shmobile/headsmp.S
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@ -0,0 +1,27 @@
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/*
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* SMP support for R-Mobile / SH-Mobile
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*
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* Copyright (C) 2010 Magnus Damm
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* Copyright (C) 2010 Takashi Yoshii
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*
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* Based on vexpress, Copyright (c) 2003 ARM Limited, All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <linux/init.h>
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#include <asm/memory.h>
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__INIT
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/*
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* Reset vector for secondary CPUs.
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* This will be mapped at address 0 by SBAR register.
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* We need _long_ jump to the physical address.
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*/
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.align 12
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ENTRY(shmobile_secondary_vector)
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ldr pc, 1f
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1: .long secondary_startup - PAGE_OFFSET + PHYS_OFFSET
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41
arch/arm/mach-shmobile/hotplug.c
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41
arch/arm/mach-shmobile/hotplug.c
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@ -0,0 +1,41 @@
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/*
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* SMP support for R-Mobile / SH-Mobile
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*
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* Copyright (C) 2010 Magnus Damm
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*
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* Based on realview, Copyright (C) 2002 ARM Ltd, All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/smp.h>
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int platform_cpu_kill(unsigned int cpu)
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{
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return 1;
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}
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void platform_cpu_die(unsigned int cpu)
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{
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while (1) {
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/*
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* here's the WFI
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*/
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asm(".word 0xe320f003\n"
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:
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:
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: "memory", "cc");
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}
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}
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int platform_cpu_disable(unsigned int cpu)
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{
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/*
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* we don't allow CPU 0 to be shutdown (it is still too special
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* e.g. clock tick interrupts)
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*/
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return cpu == 0 ? -EPERM : 0;
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}
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@ -3,6 +3,7 @@
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extern struct sys_timer shmobile_timer;
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extern void shmobile_setup_console(void);
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extern void shmobile_secondary_vector(void);
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struct clk;
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extern int clk_init(void);
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extern void shmobile_handle_irq_intc(struct pt_regs *);
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@ -40,4 +41,9 @@ extern void sh73a0_pinmux_init(void);
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extern struct clk sh73a0_extal1_clk;
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extern struct clk sh73a0_extal2_clk;
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extern unsigned int sh73a0_get_core_count(void);
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extern void sh73a0_secondary_init(unsigned int cpu);
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extern int sh73a0_boot_secondary(unsigned int cpu);
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extern void sh73a0_smp_prepare_cpus(void);
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#endif /* __ARCH_MACH_COMMON_H */
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16
arch/arm/mach-shmobile/include/mach/smp.h
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16
arch/arm/mach-shmobile/include/mach/smp.h
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@ -0,0 +1,16 @@
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#ifndef __MACH_SMP_H
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#define __MACH_SMP_H
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#include <asm/hardware/gic.h>
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#include <asm/smp_mpidr.h>
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/*
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* We use IRQ1 as the IPI
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*/
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static inline void smp_cross_call(const struct cpumask *mask)
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{
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#if defined(CONFIG_ARM_GIC)
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gic_raise_softirq(mask, 1);
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#endif
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}
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#endif
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25
arch/arm/mach-shmobile/localtimer.c
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25
arch/arm/mach-shmobile/localtimer.c
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@ -0,0 +1,25 @@
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/*
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* SMP support for R-Mobile / SH-Mobile - local timer portion
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*
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* Copyright (C) 2010 Magnus Damm
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*
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* Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <linux/clockchips.h>
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#include <asm/smp_twd.h>
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#include <asm/localtimer.h>
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/*
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* Setup the local clock events for a CPU.
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*/
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void __cpuinit local_timer_setup(struct clock_event_device *evt)
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{
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evt->irq = 29;
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twd_timer_setup(evt);
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}
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85
arch/arm/mach-shmobile/platsmp.c
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85
arch/arm/mach-shmobile/platsmp.c
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@ -0,0 +1,85 @@
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/*
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* SMP support for R-Mobile / SH-Mobile
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*
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* Copyright (C) 2010 Magnus Damm
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*
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* Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/smp.h>
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#include <linux/io.h>
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#include <asm/localtimer.h>
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#include <asm/mach-types.h>
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#include <mach/common.h>
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static unsigned int __init shmobile_smp_get_core_count(void)
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{
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if (machine_is_ag5evm())
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return sh73a0_get_core_count();
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return 1;
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}
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static void __init shmobile_smp_prepare_cpus(void)
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{
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if (machine_is_ag5evm())
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sh73a0_smp_prepare_cpus();
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}
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void __cpuinit platform_secondary_init(unsigned int cpu)
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{
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trace_hardirqs_off();
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if (machine_is_ag5evm())
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sh73a0_secondary_init(cpu);
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}
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int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
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{
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if (machine_is_ag5evm())
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return sh73a0_boot_secondary(cpu);
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return -ENOSYS;
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}
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void __init smp_init_cpus(void)
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{
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unsigned int ncores = shmobile_smp_get_core_count();
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unsigned int i;
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for (i = 0; i < ncores; i++)
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set_cpu_possible(i, true);
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}
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void __init smp_prepare_cpus(unsigned int max_cpus)
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{
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unsigned int ncores = shmobile_smp_get_core_count();
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unsigned int cpu = smp_processor_id();
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int i;
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smp_store_cpu_info(cpu);
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if (max_cpus > ncores)
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max_cpus = ncores;
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for (i = 0; i < max_cpus; i++)
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set_cpu_present(i, true);
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if (max_cpus > 1) {
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shmobile_smp_prepare_cpus();
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/*
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* Enable the local timer or broadcast device for the
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* boot CPU, but only if we have more than one CPU.
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*/
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percpu_timer_setup();
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}
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}
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97
arch/arm/mach-shmobile/smp-sh73a0.c
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97
arch/arm/mach-shmobile/smp-sh73a0.c
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@ -0,0 +1,97 @@
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/*
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* SMP support for R-Mobile / SH-Mobile - sh73a0 portion
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*
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* Copyright (C) 2010 Magnus Damm
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* Copyright (C) 2010 Takashi Yoshii
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <linux/spinlock.h>
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#include <linux/io.h>
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#include <mach/common.h>
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#include <asm/smp_scu.h>
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#include <asm/smp_twd.h>
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#include <asm/hardware/gic.h>
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#define WUPCR 0xe6151010
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#define SRESCR 0xe6151018
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#define PSTR 0xe6151040
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#define SBAR 0xe6180020
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#define APARMBAREA 0xe6f10020
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static void __iomem *scu_base_addr(void)
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{
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return (void __iomem *)0xf0000000;
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}
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static DEFINE_SPINLOCK(scu_lock);
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static unsigned long tmp;
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static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
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{
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void __iomem *scu_base = scu_base_addr();
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spin_lock(&scu_lock);
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tmp = __raw_readl(scu_base + 8);
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tmp &= ~clr;
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tmp |= set;
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spin_unlock(&scu_lock);
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/* disable cache coherency after releasing the lock */
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__raw_writel(tmp, scu_base + 8);
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}
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unsigned int __init sh73a0_get_core_count(void)
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{
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void __iomem *scu_base = scu_base_addr();
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return scu_get_core_count(scu_base);
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}
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void __cpuinit sh73a0_secondary_init(unsigned int cpu)
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{
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gic_cpu_init(0, __io(0xf0000100));
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}
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int __cpuinit sh73a0_boot_secondary(unsigned int cpu)
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{
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/* enable cache coherency */
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modify_scu_cpu_psr(0, 3 << (cpu * 8));
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if (((__raw_readw(__io(PSTR)) >> (4 * cpu)) & 3) == 3)
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__raw_writel(1 << cpu, __io(WUPCR)); /* wake up */
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else
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__raw_writel(1 << cpu, __io(SRESCR)); /* reset */
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return 0;
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}
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void __init sh73a0_smp_prepare_cpus(void)
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{
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#ifdef CONFIG_HAVE_ARM_TWD
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twd_base = (void __iomem *)0xf0000600;
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#endif
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scu_enable(scu_base_addr());
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/* Map the reset vector (in headsmp.S) */
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__raw_writel(0, __io(APARMBAREA)); /* 4k */
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__raw_writel(__pa(shmobile_secondary_vector), __io(SBAR));
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/* enable cache coherency on CPU0 */
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modify_scu_cpu_psr(0, 3 << (0 * 8));
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}
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