C++ set_smp_cross_call函数代码示例

void mcpm_smp_init_cpus(void)
{
	unsigned int i, ncores;

	ncores = MAX_NR_CLUSTERS * MAX_CPUS_PER_CLUSTER;
	printk("[%s] ncores=%d\n", __func__, ncores);

	/*
	 * sanity check, the cr_cpu_ids is configured form CONFIG_NR_CPUS
	 */
	if (ncores > nr_cpu_ids) {
	        printk("SMP: %u cores greater than maximum (%u), clipping\n",
				ncores, nr_cpu_ids);
	        ncores = nr_cpu_ids;
	}

	for (i = 0; i < ncores; i++) {
	    set_cpu_possible(i, true);
	}
#ifdef CONFIG_ARCH_SUN9IW1
	/* FIXME: init sun9i mcpm cpu map */
	sun9i_mcpm_cpu_map_init();
#endif
#ifdef CONFIG_ARCH_SUN8IW6
	/* FIXME: init sun9i mcpm cpu map */
	sun8i_mcpm_cpu_map_init();
#endif
#if defined(CONFIG_ARM_SUNXI_CPUIDLE)
	set_smp_cross_call(sunxi_raise_softirq);
#else
	set_smp_cross_call(gic_raise_softirq);
#endif
}

/*
 * Setup the set of possible CPUs (via set_cpu_possible)
 */
void sunxi_smp_init_cpus(void)
{
    unsigned int i, ncores;

    ncores = get_nr_cores();
    pr_debug("[%s] ncores=%d\n", __func__, ncores);

    /*
     * sanity check, the cr_cpu_ids is configured form CONFIG_NR_CPUS
     */
    if (ncores > nr_cpu_ids) {
        pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
                ncores, nr_cpu_ids);
        ncores = nr_cpu_ids;
    }

    for (i = 0; i < ncores; i++) {
        set_cpu_possible(i, true);
    }

#if defined(CONFIG_ARM_SUNXI_CPUIDLE)
    set_smp_cross_call(sunxi_raise_softirq);
#else
    set_smp_cross_call(gic_raise_softirq);
#endif
}

/*
 * Initialise the CPU possible map early - this describes the CPUs
 * which may be present or become present in the system.
 */
static void __init omap4_smp_init_cpus(void)
{
	unsigned int i = 0, ncores = 1, cpu_id;

	/* Use ARM cpuid check here, as SoC detection will not work so early */
	cpu_id = read_cpuid(CPUID_ID) & CPU_MASK;
	if (cpu_id == CPU_CORTEX_A9) {
		/*
		 * Currently we can't call ioremap here because
		 * SoC detection won't work until after init_early.
		 */
		scu_base =  OMAP2_L4_IO_ADDRESS(OMAP44XX_SCU_BASE);
		BUG_ON(!scu_base);
		ncores = scu_get_core_count(scu_base);
	} else if (cpu_id == CPU_CORTEX_A15) {
		ncores = OMAP5_CORE_COUNT;
	}

	/* sanity check */
	if (ncores > nr_cpu_ids) {
		pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
			ncores, nr_cpu_ids);
		ncores = nr_cpu_ids;
	}

	for (i = 0; i < ncores; i++)
		set_cpu_possible(i, true);

	set_smp_cross_call(gic_raise_softirq);
}

/*
 * 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)
{
	unsigned int i, ncores;

	/*
	 * Currently we can't call ioremap here because
	 * SoC detection won't work until after init_early.
	 */
	scu_base =  OMAP2_L4_IO_ADDRESS(OMAP44XX_SCU_BASE);
	BUG_ON(!scu_base);

	ncores = scu_get_core_count(scu_base);

	/* sanity check */
	if (ncores > nr_cpu_ids) {
		pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
			ncores, nr_cpu_ids);
		ncores = nr_cpu_ids;
	}

	for (i = 0; i < ncores; i++)
		set_cpu_possible(i, true);

	set_smp_cross_call(gic_raise_softirq);
}

static void __init vexpress_dt_smp_init_cpus(void)
{
	int ncores = 0, i;

	switch (vexpress_dt_scu) {
	case GENERIC_SCU:
		ncores = of_scan_flat_dt(vexpress_dt_cpus_num, NULL);
		break;
	case CORTEX_A9_SCU:
		ncores = scu_get_core_count(vexpress_dt_cortex_a9_scu_base);
		break;
	default:
		WARN_ON(1);
		break;
	}

	if (ncores < 2)
		return;

	if (ncores > nr_cpu_ids) {
		pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
				ncores, nr_cpu_ids);
		ncores = nr_cpu_ids;
	}

	for (i = 0; i < ncores; ++i)
		set_cpu_possible(i, true);

	set_smp_cross_call(gic_raise_softirq);
}

/*
 * 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)
{
	unsigned int i, ncores;

	/*
	 * Currently we can't call ioremap here because
	 * SoC detection won't work until after init_early.
	 */
	scu_base =  OMAP2_L4_IO_ADDRESS(OMAP44XX_SCU_BASE);
	BUG_ON(!scu_base);

	ncores = scu_get_core_count(scu_base);

	/* sanity check */
	if (ncores > NR_CPUS) {
		printk(KERN_WARNING
		       "OMAP4: no. of cores (%d) greater than configured "
		       "maximum of %d - clipping\n",
		       ncores, NR_CPUS);
		ncores = NR_CPUS;
	}

	for (i = 0; i < ncores; i++)
		set_cpu_possible(i, true);

	set_smp_cross_call(gic_raise_softirq);
}

/*
 * 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)
{
	unsigned int ncores = available_cpus();
	unsigned int i;

	if (ncores > nr_cpu_ids) {
		pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
			ncores, nr_cpu_ids);
		ncores = nr_cpu_ids;
	}

	for (i = 0; i < ncores; i++)
		set_cpu_possible(i, true);

	/* If only one CPU is possible, platform_smp_prepare_cpus() will
	   never get called. We must therefore initialize the reset handler
	   here. If there is more than one CPU, we must wait until after
	   the cpu_present_mask has been updated with all present CPUs in
	   platform_smp_prepare_cpus() before initializing the reset handler. */
	if (ncores == 1) {
		tegra_cpu_reset_handler_init();
		tegra_all_cpus_booted = true;
	}

	set_smp_cross_call(gic_raise_softirq);
}

void __init smp_init_cpus(void)
{
    unsigned int i, ncores;

    /*
     * NoteXXX: CPU 1 may not be reset clearly after power-ON.
     *          Need to apply a S/W workaround to manualy reset it first.
     */
    u32 val;
    val = *(volatile u32 *)0xF0009010;
    mt65xx_reg_sync_writel(val | 0x2, 0xF0009010);
    udelay(10);
    mt65xx_reg_sync_writel(val & ~0x2, 0xF0009010);
    udelay(10);

    ncores = scu_get_core_count((void *)SCU_BASE);

    if (ncores > NR_CPUS) {
        printk(KERN_WARNING
               "SCU core count (%d) > NR_CPUS (%d)\n", ncores, NR_CPUS);
        printk(KERN_WARNING
               "set nr_cores to NR_CPUS (%d)\n", NR_CPUS);
        ncores = NR_CPUS;
    }

    for (i = 0; i < ncores; i++)
        set_cpu_possible(i, true);

    set_smp_cross_call(irq_raise_softirq);

}

void __init smp_init_cpus(void)
{
	void __iomem *scu_base = scu_base_addr();
	unsigned int i, ncores;

	if (soc_is_exynos4210() || soc_is_exynos4212() ||
	    soc_is_exynos5250())
		ncores = 2;
	else if (soc_is_exynos4412() || soc_is_exynos5410())
		ncores = 4;
	else
		ncores = scu_base ? scu_get_core_count(scu_base) : 1;

	/* sanity check */
	if (ncores > nr_cpu_ids) {
		pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
			ncores, nr_cpu_ids);
		ncores = nr_cpu_ids;
	}

	for (i = 0; i < ncores; i++)
		set_cpu_possible(i, true);

	set_smp_cross_call(gic_raise_softirq);
}

/*
 * Initialise the CPU possible map early - this describes the CPUs
 * which may be present or become present in the system. The msm8x60
 * does not support the ARM SCU, so just set the possible cpu mask to
 * NR_CPUS.
 */
void __init smp_init_cpus(void)
{
	unsigned int i;

	for (i = 0; i < NR_CPUS; i++)
		set_cpu_possible(i, true);

        set_smp_cross_call(gic_raise_softirq);
}

/*
 * 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)
{
	unsigned int i, ncores = scu_get_core_count(scu_base);
	
	for (i = 0; i < ncores; i++)
		set_cpu_possible(i, true);

	set_smp_cross_call(gic_raise_softirq);
}

void __init smp_init_cpus(void)
{
	unsigned int i, ncores = get_core_count();

	for (i = 0; i < ncores; i++)
		cpu_set(i, cpu_possible_map);

	set_smp_cross_call(gic_raise_softirq);
}

/*
 * 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)
{
	unsigned int i, ncores = scu_get_core_count(RK30_SCU_BASE);

	if (ncores > nr_cpu_ids) {
		pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
			ncores, nr_cpu_ids);
		ncores = nr_cpu_ids;
	}

	for (i = 0; i < ncores; i++)
		set_cpu_possible(i, true);

#ifdef CONFIG_FIQ
	set_smp_cross_call(gic_raise_softirq_non_secure);
#else
	set_smp_cross_call(gic_raise_softirq);
#endif
}

/*
 * 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)
{
	int i, ncores;

	ncores = scu_get_core_count(SCU_PERIPH_BASE);

	for (i = 0; i < ncores; i++)
		set_cpu_possible(i, true);

	set_smp_cross_call(gic_raise_softirq);
}

/*
 * Initialise the CPU possible map early - this describes the CPUs
 * which may be present or become present in the system.
 */
void __init msm8625_smp_init_cpus(void)
{
	void __iomem *scu_base = scu_base_addr();

	unsigned int i, ncores;

	ncores = scu_base ? scu_get_core_count(scu_base) : 1;

	for (i = 0; i < ncores; i++)
		set_cpu_possible(i, true);

	set_smp_cross_call(gic_raise_softirq);
}