Index: kernel/generic/include/ps/cpuinfo.h
===================================================================
--- kernel/generic/include/ps/cpuinfo.h	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
+++ kernel/generic/include/ps/cpuinfo.h	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2010 Stanislav Kozina
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup generic
+ * @{
+ */
+/** @file
+ */
+
+#ifndef KERN_PS_CPU_H_
+#define KERN_PS_CPU_H_
+
+typedef struct {
+	unsigned int id;
+	uint16_t frequency_mhz;
+	uint64_t idle_ticks;
+	uint64_t busy_ticks;
+} uspace_cpu_info_t;
+
+#endif
+
+/** @}
+ */
Index: kernel/generic/include/ps/load.h
===================================================================
--- kernel/generic/include/ps/load.h	(revision 79edc36068b3e69b1d1719de0dc8332601090c30)
+++ kernel/generic/include/ps/load.h	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
@@ -33,6 +33,6 @@
  */
 
-#ifndef KERN_LOAD_H_
-#define KERN_LOAD_H_
+#ifndef KERN_PS_LOAD_H_
+#define KERN_PS_LOAD_H_
 
 extern void get_avenrun(unsigned long *loads, int shift);
Index: kernel/generic/include/ps/ps.h
===================================================================
--- kernel/generic/include/ps/ps.h	(revision 79edc36068b3e69b1d1719de0dc8332601090c30)
+++ kernel/generic/include/ps/ps.h	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
@@ -33,12 +33,14 @@
  */
 
-#ifndef KERN_PS_H_
-#define KERN_PS_H_
+#ifndef KERN_PS_PS_H_
+#define KERN_PS_PS_H_
 
 #include <ps/taskinfo.h>
+#include <ps/cpuinfo.h>
 
 extern size_t sys_ps_get_tasks(task_id_t *uspace_ids, size_t size);
 extern int sys_ps_get_task_info(task_id_t *uspace_id, task_info_t *uspace_info);
 extern int sys_ps_get_threads(task_id_t *uspace_id, thread_info_t *uspace_infos, size_t size);
+extern int sys_ps_get_cpu_info(uspace_cpu_info_t *uspace_cpu);
 
 #endif
Index: kernel/generic/include/ps/uptime.h
===================================================================
--- kernel/generic/include/ps/uptime.h	(revision 79edc36068b3e69b1d1719de0dc8332601090c30)
+++ kernel/generic/include/ps/uptime.h	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
@@ -33,6 +33,6 @@
  */
 
-#ifndef KERN_UPTIME_H_
-#define KERN_UPTIME_H_
+#ifndef KERN_PS_UPTIME_H_
+#define KERN_PS_UPTIME_H_
 
 extern int sys_ps_get_uptime(uint64_t *user_load);
Index: kernel/generic/include/syscall/syscall.h
===================================================================
--- kernel/generic/include/syscall/syscall.h	(revision 79edc36068b3e69b1d1719de0dc8332601090c30)
+++ kernel/generic/include/syscall/syscall.h	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
@@ -88,4 +88,5 @@
 	SYS_DEBUG_DISABLE_CONSOLE,
 
+	SYS_PS_GET_CPU_INFO,
 	SYS_PS_GET_TASKS,
 	SYS_PS_GET_TASK_INFO,
Index: kernel/generic/src/cpu/cpu.c
===================================================================
--- kernel/generic/src/cpu/cpu.c	(revision 79edc36068b3e69b1d1719de0dc8332601090c30)
+++ kernel/generic/src/cpu/cpu.c	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
@@ -48,4 +48,5 @@
 #include <adt/list.h>
 #include <print.h>
+#include <sysinfo/sysinfo.h>
 
 cpu_t *cpus;
@@ -96,4 +97,6 @@
 	cpu_identify();
 	cpu_arch_init();
+
+	sysinfo_set_item_val("cpu.count", NULL, config.cpu_count);
 }
 
Index: kernel/generic/src/proc/scheduler.c
===================================================================
--- kernel/generic/src/proc/scheduler.c	(revision 79edc36068b3e69b1d1719de0dc8332601090c30)
+++ kernel/generic/src/proc/scheduler.c	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
@@ -202,5 +202,7 @@
 		 */
 
+		 spinlock_lock(&CPU->lock);
 		 CPU->idle = true;
+		 spinlock_unlock(&CPU->lock);
 		 cpu_sleep();
 		 goto loop;
Index: kernel/generic/src/ps/cpu.c
===================================================================
--- kernel/generic/src/ps/cpu.c	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
+++ kernel/generic/src/ps/cpu.c	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2010 Stanislav Kozina
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup genericps
+ * @{
+ */
+
+/**
+ * @file
+ * @brief	CPU listing.
+ */
+
+#include <ps/ps.h>
+#include <ps/cpuinfo.h>
+#include <arch/asm.h>
+#include <cpu.h>
+#include <syscall/copy.h>
+
+#define WRITE_CPU_INFO(dst, i, src) copy_to_uspace(dst+i, src, sizeof(uspace_cpu_info_t))
+
+int sys_ps_get_cpu_info(uspace_cpu_info_t *uspace_cpu)
+{
+	size_t i;
+	uspace_cpu_info_t cpuinfo;
+	ipl_t ipl;
+	ipl = interrupts_disable();
+
+	for (i = 0; i < config.cpu_count; ++i) {
+		spinlock_lock(&cpus[i].lock);
+		cpuinfo.id = cpus[i].id;
+		cpuinfo.frequency_mhz = cpus[i].frequency_mhz;
+		cpuinfo.busy_ticks = cpus[i].busy_ticks;
+		cpuinfo.idle_ticks = cpus[i].idle_ticks;
+		spinlock_unlock(&cpus[i].lock);
+		WRITE_CPU_INFO(uspace_cpu, i, &cpuinfo);
+	}
+
+	interrupts_restore(ipl);
+	return 0;
+}
+
+/** @}
+ */
Index: kernel/generic/src/syscall/syscall.c
===================================================================
--- kernel/generic/src/syscall/syscall.c	(revision 79edc36068b3e69b1d1719de0dc8332601090c30)
+++ kernel/generic/src/syscall/syscall.c	(revision 62550dcebaf6572f33fa63e95f98ecc3f61f4cec)
@@ -170,4 +170,5 @@
 
 	/* Ps calls */
+	(syshandler_t) sys_ps_get_cpu_info,
 	(syshandler_t) sys_ps_get_tasks,
 	(syshandler_t) sys_ps_get_task_info,
