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ARM: SoC: convert VExpress/RealView to SMP operations 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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
View File

@ -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;