smp.c File Reference

#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/cpumask.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/profile.h>
#include <linux/smp.h>
#include <linux/cpu.h>
#include <asm/tlbflush.h>
#include <asm/bitops.h>
#include <asm/processor.h>
#include <asm/bug.h>
#include <asm/exceptions.h>
#include <asm/hardirq.h>
#include <asm/fpu.h>
#include <asm/mmu_context.h>
#include <asm/thread_info.h>
#include <asm/cpu-regs.h>
#include <asm/intctl-regs.h>
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	nmi_call_data_struct

Macros
#define	Dprintk(fmt,...)   no_printk(KERN_DEBUG fmt, ##__VA_ARGS__)
#define	CALL_FUNCTION_NMI_IPI_TIMEOUT   0

Functions
struct nmi_call_data_struct	__attribute__ ((__aligned__(SMP_CACHE_BYTES)))
void	send_IPI_self (int irq)
void	send_IPI_allbutself (int irq)
void	arch_send_call_function_ipi_mask (const struct cpumask *mask)
void	arch_send_call_function_single_ipi (int cpu)
void	smp_send_reschedule (int cpu)
int	smp_nmi_call_function (smp_call_func_t func, void *info, int wait)
void	smp_jump_to_debugger (void)
void	stop_this_cpu (void *unused)
void	smp_send_stop (void)
void	smp_nmi_call_function_interrupt (void)
void __init	smp_init_cpus (void)
void	smp_prepare_cpu_init (void)
int __init	start_secondary (void *unused)
void __init	smp_prepare_cpus (unsigned int max_cpus)
void __init	smp_cpus_done (unsigned int max_cpus)
void __devinit	smp_prepare_boot_cpu (void)
void	initialize_secondary (void)
int __devinit	__cpu_up (unsigned int cpu, struct task_struct *tidle)
int	setup_profiling_timer (unsigned int multiplier)

Variables
smp_call_func_t	func
void *	info
cpumask_t	started
cpumask_t	finished
int	wait
cpumask_t	cpu_boot_map
unsigned long	start_stack [NR_CPUS-1]
struct mn10300_cpuinfo cpu_data[NR_CPUS]	__cacheline_aligned
cpumask_t cpu_initialized	__initdata = CPU_MASK_NONE

Macro Definition Documentation

#define CALL_FUNCTION_NMI_IPI_TIMEOUT   0

Definition at line 62 of file smp.c.

#define Dprintk	(		fmt,
			...
	)		no_printk(KERN_DEBUG fmt, ##__VA_ARGS__)

Definition at line 58 of file smp.c.

Function Documentation

struct nmi_call_data_struct __attribute__

(

(__aligned__(SMP_CACHE_BYTES))

)

int __devinit __cpu_up	(	unsigned int	cpu,
		struct task_struct *	tidle
	)

__cpu_up - Set smp_commenced_mask for the nominated CPU : The target CPU.

Definition at line 925 of file smp.c.

void arch_send_call_function_ipi_mask

(

const struct cpumask *

mask

)

Definition at line 349 of file smp.c.

void arch_send_call_function_single_ipi

(

int

cpu

)

Definition at line 355 of file smp.c.

void initialize_secondary

(

void

)

Definition at line 912 of file smp.c.

void send_IPI_allbutself

(

int

irq

)

send_IPI_allbutself - Send IPIs to all the other CPUs. : The IPI request to be sent.

Send the specified IPI to all CPUs in the system barring the current one, not waiting for them to finish before returning. The caller is responsible for synchronisation if that is needed.

Definition at line 340 of file smp.c.

void send_IPI_self

(

int

irq

)

send_IPI_self - Send an IPI to this CPU. : The IPI request to be sent.

Send the specified IPI to the current CPU.

Definition at line 327 of file smp.c.

int setup_profiling_timer

(

unsigned int

multiplier

)

setup_profiling_timer - Set up the profiling timer - The frequency multiplier to use

The frequency of the profiling timer can be changed by writing a multiplier value into /proc/profile.

Definition at line 956 of file smp.c.

void __init smp_cpus_done

(

unsigned int

max_cpus

)

smp_cpus_done - : Maximum CPU count.

Do nothing.

Definition at line 890 of file smp.c.

void __init smp_init_cpus

(

void

)

Definition at line 556 of file smp.c.

void smp_jump_to_debugger

(

void

)

smp_jump_to_debugger - Make other CPUs enter the debugger by sending an IPI

Send a non-maskable request to all other CPUs in the system, instructing them to jump into the debugger. The caller is responsible for checking that the other CPUs responded to the instruction.

The caller should make sure that this CPU's debugger IPI is disabled.

Definition at line 450 of file smp.c.

int smp_nmi_call_function	(	smp_call_func_t	func,
		void *	info,
		int	wait
	)

smp_nmi_call_function - Send a call function NMI IPI to all CPUs : The function to ask to be run. : The context data to pass to that function. : If true, wait (atomically) until function is run on all CPUs.

Send a non-maskable request to all CPUs in the system, requesting them to run the specified function with the given context data, and, potentially, to wait for completion of that function on all CPUs.

Returns 0 if successful, -ETIMEDOUT if we were asked to wait, but hit the timeout.

Definition at line 382 of file smp.c.

void smp_nmi_call_function_interrupt

(

void

)

smp_nmi_call_function_interrupt - Non-maskable call function IPI handler

Definition at line 521 of file smp.c.

void __devinit smp_prepare_boot_cpu

(

void

)

Definition at line 900 of file smp.c.

void smp_prepare_cpu_init

(

void

)

smp_prepare_cpu_init - Initialise CPU in startup_secondary

Set interrupt level 0-6 setting and init ICR of the kernel debugger.

Definition at line 621 of file smp.c.

void __init smp_prepare_cpus

(

unsigned int

max_cpus

)

smp_prepare_cpus - Boot up secondary CPUs (APs) : Maximum number of CPUs to boot.

Call do_boot_cpu, and boot up APs.

Definition at line 680 of file smp.c.

void smp_send_reschedule

(

int

cpu

)

smp_send_reschedule - Send reschedule IPI to a CPU : The CPU to target.

Definition at line 364 of file smp.c.

void smp_send_stop

(

void

)

smp_send_stop - Send a stop request to all CPUs.

Definition at line 486 of file smp.c.

int __init start_secondary

(

void *

unused

)

start_secondary - Activate a secondary CPU (AP) : Thread parameter (ignored).

Definition at line 656 of file smp.c.

void stop_this_cpu

(

void *

unused

)

stop_this_cpu - Callback to stop a CPU. : Callback context (ignored).

Definition at line 461 of file smp.c.

Variable Documentation

struct mn10300_cpuinfo cpu_data [NR_CPUS] __cacheline_aligned

Definition at line 91 of file smp.c.

cpumask_t cpu_initialized __initdata = CPU_MASK_NONE

Definition at line 95 of file smp.c.

cpumask_t cpu_boot_map

Definition at line 85 of file smp.c.

cpumask_t finished

Definition at line 79 of file smp.c.

smp_call_func_t func

Definition at line 76 of file smp.c.

void* info

Definition at line 77 of file smp.c.

unsigned long start_stack[NR_CPUS-1]

Definition at line 86 of file smp.c.

cpumask_t started

Definition at line 78 of file smp.c.

to wait

for all cpus to start executing it.

CONTEXT: Might sleep.

RETURNS: -ENOENT if

Definition at line 80 of file smp.c.