C++ (Cpp) init_cpu_topology示例

示例#1

文件： setup.c 项目： Broadcom/stblinux

void __init start_parisc(void)
{
	extern void early_trap_init(void);

	int ret, cpunum;
	struct pdc_coproc_cfg coproc_cfg;

	/* check QEMU/SeaBIOS marker in PAGE0 */
	running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0);

	cpunum = smp_processor_id();

	init_cpu_topology();

	set_firmware_width_unlocked();

	ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
	if (ret >= 0 && coproc_cfg.ccr_functional) {
		mtctl(coproc_cfg.ccr_functional, 10);

		per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
		per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;

		asm volatile ("fstd	%fr0,8(%sp)");
	} else {

示例#2

文件： smp.c 项目： 47fortyseven/custom_kernel_hermes

void __init smp_prepare_cpus(unsigned int max_cpus)
{
	int err;
	unsigned int cpu, ncores = num_possible_cpus();

	init_cpu_topology();

	smp_store_cpu_info(smp_processor_id());


	/*
	 * are we trying to boot more cores than exist?
	 */
	if (max_cpus > ncores)
		max_cpus = ncores;

	/* Don't bother if we're effectively UP */
	if (max_cpus <= 1)
		return;

	/*
	 * Initialise the present map (which describes the set of CPUs
	 * actually populated at the present time) and release the
	 * secondaries from the bootloader.
	 *
	 * Make sure we online at most (max_cpus - 1) additional CPUs.
	 */
	max_cpus--;
	for_each_possible_cpu(cpu) {
		if (max_cpus == 0)
			break;

		if (cpu == smp_processor_id())
			continue;

		if (!cpu_ops[cpu])
			continue;

		err = cpu_ops[cpu]->cpu_prepare(cpu);
		if (err)
			continue;

		set_cpu_present(cpu, true);
		max_cpus--;
	}
}

示例#3

文件： smp.c 项目： bradbishop/linux

void __init smp_prepare_cpus(unsigned int max_cpus)
{
	int err;
	unsigned int cpu;
	unsigned int this_cpu;

	init_cpu_topology();

	this_cpu = smp_processor_id();
	store_cpu_topology(this_cpu);
	numa_store_cpu_info(this_cpu);

	/*
	 * If UP is mandated by "nosmp" (which implies "maxcpus=0"), don't set
	 * secondary CPUs present.
	 */
	if (max_cpus == 0)
		return;

	/*
	 * Initialise the present map (which describes the set of CPUs
	 * actually populated at the present time) and release the
	 * secondaries from the bootloader.
	 */
	for_each_possible_cpu(cpu) {

		if (cpu == smp_processor_id())
			continue;

		if (!cpu_ops[cpu])
			continue;

		err = cpu_ops[cpu]->cpu_prepare(cpu);
		if (err)
			continue;

		set_cpu_present(cpu, true);
		numa_store_cpu_info(cpu);
	}
}

示例#4

文件： setup.c 项目： CCNITSilchar/linux

void __init start_parisc(void)
{
	extern void early_trap_init(void);

	int ret, cpunum;
	struct pdc_coproc_cfg coproc_cfg;

	cpunum = smp_processor_id();

	init_cpu_topology();

	set_firmware_width_unlocked();

	ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
	if (ret >= 0 && coproc_cfg.ccr_functional) {
		mtctl(coproc_cfg.ccr_functional, 10);

		per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
		per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;

		asm volatile ("fstd	%fr0,8(%sp)");
	} else {

示例#5

文件： smp.c 项目： lbule/android_kernel_htc_m9pw

void __init smp_prepare_cpus(unsigned int max_cpus)
{
	int err;
	unsigned int cpu, ncores = num_possible_cpus();

	init_cpu_topology();

	smp_store_cpu_info(smp_processor_id());


	if (max_cpus > ncores)
		max_cpus = ncores;

	
	if (max_cpus <= 1)
		return;

	max_cpus--;
	for_each_possible_cpu(cpu) {
		if (max_cpus == 0)
			break;

		if (cpu == smp_processor_id())
			continue;

		if (!cpu_ops[cpu])
			continue;

		err = cpu_ops[cpu]->cpu_prepare(cpu);
		if (err)
			continue;

		set_cpu_present(cpu, true);
		max_cpus--;
	}
}