smp_plat.h

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/*
 * ARM specific SMP header, this contains our implementation
 * details.
 */
#ifndef __ASMARM_SMP_PLAT_H
#define __ASMARM_SMP_PLAT_H

#include <asm/cputype.h>

/*
 * Return true if we are running on a SMP platform
 */
static inline bool is_smp(void)
{
#ifndef CONFIG_SMP
    return false;
#elif defined(CONFIG_SMP_ON_UP)
    extern unsigned int smp_on_up;
    return !!smp_on_up;
#else
    return true;
#endif
}

/* all SMP configurations have the extended CPUID registers */
static inline int tlb_ops_need_broadcast(void)
{
    if (!is_smp())
        return 0;

    return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2;
}

#if !defined(CONFIG_SMP) || __LINUX_ARM_ARCH__ >= 7
#define cache_ops_need_broadcast()  0
#else
static inline int cache_ops_need_broadcast(void)
{
    if (!is_smp())
        return 0;

    return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 1;
}
#endif

/*
 * Logical CPU mapping.
 */
extern int __cpu_logical_map[];
#define cpu_logical_map(cpu)    __cpu_logical_map[cpu]

#endif