mp.c File Reference

Multiprocessor functions. More...

#include <ipxe/timer.h>
#include <ipxe/mp.h>

Go to the source code of this file.

Macros
#define	MP_MAX_CPUID_WAIT_MS   10
	Time to wait for application processors. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
unsigned int	mp_boot_cpuid (void)
	Get boot CPU identifier. More...
unsigned int	mp_max_cpuid (void)
	Get maximum CPU identifier. More...

Detailed Description

Multiprocessor functions.

Definition in file mp.c.

Macro Definition Documentation

MP_MAX_CPUID_WAIT_MS

#define MP_MAX_CPUID_WAIT_MS   10

Time to wait for application processors.

Definition at line 36 of file mp.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

mp_boot_cpuid()

unsigned int mp_boot_cpuid

(

void

)

Get boot CPU identifier.

Return values

id	Boot CPU identifier

Definition at line 43 of file mp.c.

                                    {
        unsigned int max = 0;

        /* Update maximum to accommodate boot processor */
        mp_exec_boot ( mp_update_max_cpuid, &max );
        DBGC ( &mp_call, "MP boot processor ID is %#x\n", max );

        return max;
}

References DBGC, max, mp_call(), mp_exec_boot(), and mp_update_max_cpuid.

Referenced by mp_max_cpuid(), and ucode_update_all().

mp_max_cpuid()

unsigned int mp_max_cpuid

(

void

)

Get maximum CPU identifier.

Return values

max	Maximum CPU identifier

Definition at line 58 of file mp.c.

                                   {
        unsigned int max = mp_boot_cpuid();

        /* Update maximum to accommodate application processors */
        mp_start_all ( mp_update_max_cpuid, &max );
        mdelay ( MP_MAX_CPUID_WAIT_MS );
        DBGC ( &mp_call, "MP observed maximum CPU ID is %#x\n", max );

        return max;
}

References DBGC, max, mdelay(), mp_boot_cpuid(), mp_call(), MP_MAX_CPUID_WAIT_MS, mp_start_all(), and mp_update_max_cpuid.

Referenced by ucode_update_all().