C++ (Cpp) cpufeatures_deps_enable Examples

Example #1

File: dt_cpu_ftrs.c Project: andyprice/linux

static int __init dt_cpu_ftrs_scan_callback(unsigned long node, const char
					    *uname, int depth, void *data)
{
	const __be32 *prop;
	int count, i;
	u32 isa;

	/* We are scanning "ibm,powerpc-cpu-features" nodes only */
	if (!of_flat_dt_is_compatible(node, "ibm,powerpc-cpu-features"))
		return 0;

	prop = of_get_flat_dt_prop(node, "isa", NULL);
	if (!prop)
		/* We checked before, "can't happen" */
		return 0;

	isa = be32_to_cpup(prop);

	/* Count and allocate space for cpu features */
	of_scan_flat_dt_subnodes(node, count_cpufeatures_subnodes,
						&nr_dt_cpu_features);
	dt_cpu_features = __va(
		memblock_alloc(sizeof(struct dt_cpu_feature)*
				nr_dt_cpu_features, PAGE_SIZE));

	cpufeatures_setup_start(isa);

	/* Scan nodes into dt_cpu_features and enable those without deps  */
	count = 0;
	of_scan_flat_dt_subnodes(node, scan_cpufeatures_subnodes, &count);

	/* Recursive enable remaining features with dependencies */
	for (i = 0; i < nr_dt_cpu_features; i++) {
		struct dt_cpu_feature *f = &dt_cpu_features[i];

		cpufeatures_deps_enable(f);
	}

	prop = of_get_flat_dt_prop(node, "display-name", NULL);
	if (prop && strlen((char *)prop) != 0) {
		strlcpy(dt_cpu_name, (char *)prop, sizeof(dt_cpu_name));
		cur_cpu_spec->cpu_name = dt_cpu_name;
	}

	cpufeatures_setup_finished();

	memblock_free(__pa(dt_cpu_features),
			sizeof(struct dt_cpu_feature)*nr_dt_cpu_features);

	return 0;
}

Example #2

File: dt_cpu_ftrs.c Project: AlexShiLucky/linux

static void __init cpufeatures_deps_enable(struct dt_cpu_feature *f)
{
	const __be32 *prop;
	int len;
	int nr_deps;
	int i;

	if (f->enabled || f->disabled)
		return;

	prop = of_get_flat_dt_prop(f->node, "dependencies", &len);
	if (!prop) {
		pr_warn("%s: missing dependencies property", f->name);
		return;
	}

	nr_deps = len / sizeof(int);

	for (i = 0; i < nr_deps; i++) {
		unsigned long phandle = be32_to_cpu(prop[i]);
		int j;

		for (j = 0; j < nr_dt_cpu_features; j++) {
			struct dt_cpu_feature *d = &dt_cpu_features[j];

			if (of_get_flat_dt_phandle(d->node) == phandle) {
				cpufeatures_deps_enable(d);
				if (d->disabled) {
					f->disabled = 1;
					return;
				}
			}
		}
	}

	if (cpufeatures_process_feature(f))
		f->enabled = 1;
	else
		f->disabled = 1;
}