[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/base/topology.c b/ap/os/linux/linux-3.4.x/drivers/base/topology.c
new file mode 100644
index 0000000..ae989c5
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/base/topology.c
@@ -0,0 +1,196 @@
+/*
+ * driver/base/topology.c - Populate sysfs with cpu topology information
+ *
+ * Written by: Zhang Yanmin, Intel Corporation
+ *
+ * Copyright (C) 2006, Intel Corp.
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/cpu.h>
+#include <linux/module.h>
+#include <linux/hardirq.h>
+#include <linux/topology.h>
+
+#define define_one_ro_named(_name, _func) \
+ static DEVICE_ATTR(_name, 0444, _func, NULL)
+
+#define define_one_ro(_name) \
+ static DEVICE_ATTR(_name, 0444, show_##_name, NULL)
+
+#define define_id_show_func(name) \
+static ssize_t show_##name(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ unsigned int cpu = dev->id; \
+ return sprintf(buf, "%d\n", topology_##name(cpu)); \
+}
+
+#if defined(topology_thread_cpumask) || defined(topology_core_cpumask) || \
+ defined(topology_book_cpumask)
+static ssize_t show_cpumap(int type, const struct cpumask *mask, char *buf)
+{
+ ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf;
+ int n = 0;
+
+ if (len > 1) {
+ n = type?
+ cpulist_scnprintf(buf, len-2, mask) :
+ cpumask_scnprintf(buf, len-2, mask);
+ buf[n++] = '\n';
+ buf[n] = '\0';
+ }
+ return n;
+}
+#endif
+
+#ifdef arch_provides_topology_pointers
+#define define_siblings_show_map(name) \
+static ssize_t show_##name(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ unsigned int cpu = dev->id; \
+ return show_cpumap(0, topology_##name(cpu), buf); \
+}
+
+#define define_siblings_show_list(name) \
+static ssize_t show_##name##_list(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ unsigned int cpu = dev->id; \
+ return show_cpumap(1, topology_##name(cpu), buf); \
+}
+
+#else
+#define define_siblings_show_map(name) \
+static ssize_t show_##name(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ return show_cpumap(0, topology_##name(dev->id), buf); \
+}
+
+#define define_siblings_show_list(name) \
+static ssize_t show_##name##_list(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return show_cpumap(1, topology_##name(dev->id), buf); \
+}
+#endif
+
+#define define_siblings_show_func(name) \
+ define_siblings_show_map(name); define_siblings_show_list(name)
+
+define_id_show_func(physical_package_id);
+define_one_ro(physical_package_id);
+
+define_id_show_func(core_id);
+define_one_ro(core_id);
+
+define_siblings_show_func(thread_cpumask);
+define_one_ro_named(thread_siblings, show_thread_cpumask);
+define_one_ro_named(thread_siblings_list, show_thread_cpumask_list);
+
+define_siblings_show_func(core_cpumask);
+define_one_ro_named(core_siblings, show_core_cpumask);
+define_one_ro_named(core_siblings_list, show_core_cpumask_list);
+
+#ifdef CONFIG_SCHED_BOOK
+define_id_show_func(book_id);
+define_one_ro(book_id);
+define_siblings_show_func(book_cpumask);
+define_one_ro_named(book_siblings, show_book_cpumask);
+define_one_ro_named(book_siblings_list, show_book_cpumask_list);
+#endif
+
+static struct attribute *default_attrs[] = {
+ &dev_attr_physical_package_id.attr,
+ &dev_attr_core_id.attr,
+ &dev_attr_thread_siblings.attr,
+ &dev_attr_thread_siblings_list.attr,
+ &dev_attr_core_siblings.attr,
+ &dev_attr_core_siblings_list.attr,
+#ifdef CONFIG_SCHED_BOOK
+ &dev_attr_book_id.attr,
+ &dev_attr_book_siblings.attr,
+ &dev_attr_book_siblings_list.attr,
+#endif
+ NULL
+};
+
+static struct attribute_group topology_attr_group = {
+ .attrs = default_attrs,
+ .name = "topology"
+};
+
+/* Add/Remove cpu_topology interface for CPU device */
+static int __cpuinit topology_add_dev(unsigned int cpu)
+{
+ struct device *dev = get_cpu_device(cpu);
+
+ return sysfs_create_group(&dev->kobj, &topology_attr_group);
+}
+
+static void __cpuinit topology_remove_dev(unsigned int cpu)
+{
+ struct device *dev = get_cpu_device(cpu);
+
+ sysfs_remove_group(&dev->kobj, &topology_attr_group);
+}
+
+static int __cpuinit topology_cpu_callback(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
+{
+ unsigned int cpu = (unsigned long)hcpu;
+ int rc = 0;
+
+ switch (action) {
+ case CPU_UP_PREPARE:
+ case CPU_UP_PREPARE_FROZEN:
+ rc = topology_add_dev(cpu);
+ break;
+ case CPU_UP_CANCELED:
+ case CPU_UP_CANCELED_FROZEN:
+ case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
+ topology_remove_dev(cpu);
+ break;
+ }
+ return notifier_from_errno(rc);
+}
+
+static int __cpuinit topology_sysfs_init(void)
+{
+ int cpu;
+ int rc;
+
+ for_each_online_cpu(cpu) {
+ rc = topology_add_dev(cpu);
+ if (rc)
+ return rc;
+ }
+ hotcpu_notifier(topology_cpu_callback, 0);
+
+ return 0;
+}
+
+device_initcall(topology_sysfs_init);