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ARM: SoC: convert VExpress/RealView to SMP operations

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Convert both Realview and VExpress to use struct smp_operations to
provide their SMP and CPU hotplug operation.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Marc Zyngier 2011-09-08 13:15:22 +01:00 committed by Arnd Bergmann
parent abcee5fb0d
commit 3695adc2fd
11 changed files with 59 additions and 40 deletions
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3
arch/arm/mach-realview/core.h
View File

@ -56,4 +56,7 @@ extern void realview_init_early(void);
extern void realview_fixup(struct tag *tags, char **from,
struct meminfo *meminfo);
extern struct smp_operations realview_smp_ops;
extern void realview_cpu_die(unsigned int cpu);
#endif

16
arch/arm/mach-realview/hotplug.c
View File

@ -89,17 +89,12 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
}
}
int platform_cpu_kill(unsigned int cpu)
{
return 1;
}
/*
* platform-specific code to shutdown a CPU
*
* Called with IRQs disabled
*/
void platform_cpu_die(unsigned int cpu)
void __ref realview_cpu_die(unsigned int cpu)
{
int spurious = 0;
@ -118,12 +113,3 @@ void platform_cpu_die(unsigned int cpu)
if (spurious)
pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
}
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;
}

18
arch/arm/mach-realview/platsmp.c
View File

@ -22,9 +22,9 @@
#include <mach/board-pb11mp.h>
#include <mach/board-pbx.h>
#include "core.h"
#include <plat/platsmp.h>
extern void versatile_secondary_startup(void);
#include "core.h"
static void __iomem *scu_base_addr(void)
{
@ -43,7 +43,7 @@ static void __iomem *scu_base_addr(void)
* Initialise the CPU possible map early - this describes the CPUs
* which may be present or become present in the system.
*/
void __init smp_init_cpus(void)
static void __init realview_smp_init_cpus(void)
{
void __iomem *scu_base = scu_base_addr();
unsigned int i, ncores;
@ -63,7 +63,7 @@ void __init smp_init_cpus(void)
set_smp_cross_call(gic_raise_softirq);
}
void __init platform_smp_prepare_cpus(unsigned int max_cpus)
static void __init realview_smp_prepare_cpus(unsigned int max_cpus)
{
scu_enable(scu_base_addr());
@ -77,3 +77,13 @@ void __init platform_smp_prepare_cpus(unsigned int max_cpus)
__raw_writel(virt_to_phys(versatile_secondary_startup),
__io_address(REALVIEW_SYS_FLAGSSET));
}
struct smp_operations realview_smp_ops __initdata = {
.smp_init_cpus = realview_smp_init_cpus,
.smp_prepare_cpus = realview_smp_prepare_cpus,
.smp_secondary_init = versatile_secondary_init,
.smp_boot_secondary = versatile_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_die = realview_cpu_die,
#endif
};

1
arch/arm/mach-realview/realview_pb11mp.c
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@ -366,6 +366,7 @@ static void __init realview_pb11mp_init(void)
MACHINE_START(REALVIEW_PB11MP, "ARM-RealView PB11MPCore")
/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
.atag_offset = 0x100,
.smp = smp_ops(realview_smp_ops),
.fixup = realview_fixup,
.map_io = realview_pb11mp_map_io,
.init_early = realview_init_early,

1
arch/arm/mach-realview/realview_pbx.c
View File

@ -403,6 +403,7 @@ static void __init realview_pbx_init(void)
MACHINE_START(REALVIEW_PBX, "ARM-RealView PBX")
/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
.atag_offset = 0x100,
.smp = smp_ops(realview_smp_ops),
.fixup = realview_pbx_fixup,
.map_io = realview_pbx_map_io,
.init_early = realview_init_early,

4
arch/arm/mach-vexpress/core.h
View File

@ -5,3 +5,7 @@
#define V2T_PERIPH 0xf8200000
void vexpress_dt_smp_map_io(void);
extern struct smp_operations vexpress_smp_ops;
extern void vexpress_cpu_die(unsigned int cpu);

16
arch/arm/mach-vexpress/hotplug.c
View File

@ -84,17 +84,12 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
}
}
int platform_cpu_kill(unsigned int cpu)
{
return 1;
}
/*
* platform-specific code to shutdown a CPU
*
* Called with IRQs disabled
*/
void platform_cpu_die(unsigned int cpu)
void __ref vexpress_cpu_die(unsigned int cpu)
{
int spurious = 0;
@ -113,12 +108,3 @@ void platform_cpu_die(unsigned int cpu)
if (spurious)
pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
}
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;
}

18
arch/arm/mach-vexpress/platsmp.c
View File

@ -20,9 +20,9 @@
#include <mach/motherboard.h>
#include "core.h"
#include <plat/platsmp.h>
extern void versatile_secondary_startup(void);
#include "core.h"
#if defined(CONFIG_OF)
@ -167,7 +167,7 @@ void __init vexpress_dt_smp_prepare_cpus(unsigned int max_cpus)
* Initialise the CPU possible map early - this describes the CPUs
* which may be present or become present in the system.
*/
void __init smp_init_cpus(void)
static void __init vexpress_smp_init_cpus(void)
{
if (ct_desc)
ct_desc->init_cpu_map();
@ -176,7 +176,7 @@ void __init smp_init_cpus(void)
}
void __init platform_smp_prepare_cpus(unsigned int max_cpus)
static void __init vexpress_smp_prepare_cpus(unsigned int max_cpus)
{
/*
* Initialise the present map, which describes the set of CPUs
@ -195,3 +195,13 @@ void __init platform_smp_prepare_cpus(unsigned int max_cpus)
*/
v2m_flags_set(virt_to_phys(versatile_secondary_startup));
}
struct smp_operations __initdata vexpress_smp_ops = {
.smp_init_cpus = vexpress_smp_init_cpus,
.smp_prepare_cpus = vexpress_smp_prepare_cpus,
.smp_secondary_init = versatile_secondary_init,
.smp_boot_secondary = versatile_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_die = vexpress_cpu_die,
#endif
};

4
arch/arm/mach-vexpress/v2m.c
View File

@ -5,6 +5,7 @@
#include <linux/amba/bus.h>
#include <linux/amba/mmci.h>
#include <linux/io.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/of_address.h>
#include <linux/of_fdt.h>
@ -38,6 +39,7 @@
#include <mach/motherboard.h>
#include <plat/sched_clock.h>
#include <plat/platsmp.h>
#include "core.h"
@ -530,6 +532,7 @@ static void __init v2m_init(void)
MACHINE_START(VEXPRESS, "ARM-Versatile Express")
.atag_offset = 0x100,
.smp = smp_ops(vexpress_smp_ops),
.map_io = v2m_map_io,
.init_early = v2m_init_early,
.init_irq = v2m_init_irq,
@ -663,6 +666,7 @@ const static char *v2m_dt_match[] __initconst = {
DT_MACHINE_START(VEXPRESS_DT, "ARM-Versatile Express")
.dt_compat = v2m_dt_match,
.smp = smp_ops(vexpress_smp_ops),
.map_io = v2m_dt_map_io,
.init_early = v2m_dt_init_early,
.init_irq = v2m_dt_init_irq,

14
arch/arm/plat-versatile/include/plat/platsmp.h Normal file
View File

@ -0,0 +1,14 @@
/*
* linux/arch/arm/plat-versatile/include/plat/platsmp.h
*
* Copyright (C) 2011 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.
*/
extern void versatile_secondary_startup(void);
extern void versatile_secondary_init(unsigned int cpu);
extern int versatile_boot_secondary(unsigned int cpu, struct task_struct *idle);

4
arch/arm/plat-versatile/platsmp.c
View File

@ -40,7 +40,7 @@ static void __cpuinit write_pen_release(int val)
static DEFINE_SPINLOCK(boot_lock);
void __cpuinit platform_secondary_init(unsigned int cpu)
void __cpuinit versatile_secondary_init(unsigned int cpu)
{
/*
* if any interrupts are already enabled for the primary
@ -62,7 +62,7 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
spin_unlock(&boot_lock);
}
int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
int __cpuinit versatile_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
unsigned long timeout;