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Commit 0293ca81 authored by James Bottomley's avatar James Bottomley Committed by James Bottomley
Browse files

[VOYAGER] add smp_call_function_single 



This apparently has msr users now, so add it to the voyager HAL

Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent de46c337

arch/i386/mach-voyager/voyager_smp.c

+44 −13
Original line number Diff line number Diff line
@@ -1082,20 +1082,11 @@ smp_call_function_interrupt(void) 
	}

}



/* Call this function on all CPUs using the function_interrupt above 

    <func> The function to run. This must be fast and non-blocking.

    <info> An arbitrary pointer to pass to the function.

    <retry> If true, keep retrying until ready.

    <wait> If true, wait until function has completed on other CPUs.

    [RETURNS] 0 on success, else a negative status code. Does not return until

    remote CPUs are nearly ready to execute <<func>> or are or have executed.

*/

int

smp_call_function (void (*func) (void *info), void *info, int retry,

		   int wait)

static int

__smp_call_function_mask (void (*func) (void *info), void *info, int retry,

			  int wait, __u32 mask)

{

	struct call_data_struct data;

	__u32 mask = cpus_addr(cpu_online_map)[0];



	mask &= ~(1<<smp_processor_id());
@@ -1116,7 +1107,7 @@ smp_call_function (void (*func) (void *info), void *info, int retry, 
	call_data = &data;

	wmb();

	/* Send a message to all other CPUs and wait for them to respond */

	send_CPI_allbutself(VIC_CALL_FUNCTION_CPI);

	send_CPI(mask, VIC_CALL_FUNCTION_CPI);



	/* Wait for response */

	while (data.started)
@@ -1130,8 +1121,48 @@ smp_call_function (void (*func) (void *info), void *info, int retry, 


	return 0;

}



/* Call this function on all CPUs using the function_interrupt above

    <func> The function to run. This must be fast and non-blocking.

    <info> An arbitrary pointer to pass to the function.

    <retry> If true, keep retrying until ready.

    <wait> If true, wait until function has completed on other CPUs.

    [RETURNS] 0 on success, else a negative status code. Does not return until

    remote CPUs are nearly ready to execute <<func>> or are or have executed.

*/

int

smp_call_function(void (*func) (void *info), void *info, int retry,

		   int wait)

{

	__u32 mask = cpus_addr(cpu_online_map)[0];



	return __smp_call_function_mask(func, info, retry, wait, mask);

}

EXPORT_SYMBOL(smp_call_function);



/*

 * smp_call_function_single - Run a function on another CPU

 * @func: The function to run. This must be fast and non-blocking.

 * @info: An arbitrary pointer to pass to the function.

 * @nonatomic: Currently unused.

 * @wait: If true, wait until function has completed on other CPUs.

 *

 * Retrurns 0 on success, else a negative status code.

 *

 * Does not return until the remote CPU is nearly ready to execute <func>

 * or is or has executed.

 */



int

smp_call_function_single(int cpu, void (*func) (void *info), void *info,

			 int nonatomic, int wait)

{

	__u32 mask = 1 << cpu;



	return __smp_call_function_mask(func, info, nonatomic, wait, mask);

}

EXPORT_SYMBOL(smp_call_function_single);



/* Sorry about the name.  In an APIC based system, the APICs

 * themselves are programmed to send a timer interrupt.  This is used

 * by linux to reschedule the processor.  Voyager doesn't have this,