From: Peter Dinda <pdinda@northwestern.edu>
Date: Wed, 20 Aug 2014 14:35:38 +0000 (-0500)
Subject: DVFS - added forgotten user-space library
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=commitdiff_plain;h=a82645917cee62af80d1f1c3b537a12807c25606

DVFS - added forgotten user-space library
---

diff --git a/linux_usr/v3_user_dvfs.c b/linux_usr/v3_user_dvfs.c
new file mode 100644
index 0000000..8d4d930
--- /dev/null
+++ b/linux_usr/v3_user_dvfs.c
@@ -0,0 +1,76 @@
+#include <unistd.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <malloc.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "v3_ctrl.h"
+#include "v3_user_dvfs.h"
+
+int v3_user_dvfs_acquire_direct(uint32_t core)
+{
+    struct v3_dvfs_ctrl_request r;
+
+    r.cmd=V3_DVFS_ACQUIRE;
+    r.acq_type=V3_DVFS_DIRECT;
+    r.pcore=core;
+    r.freq_khz=0;
+    r.pstate=0;
+
+    return v3_dev_ioctl(V3_DVFS_CTRL,&r);
+}
+
+int v3_user_dvfs_acquire_external(uint32_t core)
+{
+    struct v3_dvfs_ctrl_request r;
+
+    r.cmd=V3_DVFS_ACQUIRE;
+    r.acq_type=V3_DVFS_EXTERNAL;
+    r.pcore=core;
+    r.freq_khz=0;
+    r.pstate=0;
+
+    return v3_dev_ioctl(V3_DVFS_CTRL,&r);
+}
+
+int v3_user_dvfs_release(uint32_t core)
+{
+    struct v3_dvfs_ctrl_request r;
+
+    r.cmd=V3_DVFS_RELEASE;
+    r.acq_type=V3_DVFS_DIRECT;
+    r.pcore=core;
+    r.freq_khz=0;
+    r.pstate=0;
+
+    return v3_dev_ioctl(V3_DVFS_CTRL,&r);
+}
+
+
+int v3_user_dvfs_set_pstate(uint32_t core, uint8_t pstate)
+{
+    struct v3_dvfs_ctrl_request r;
+
+    r.cmd=V3_DVFS_SETPSTATE;
+    r.acq_type=V3_DVFS_DIRECT;
+    r.pcore=core;
+    r.freq_khz=0;
+    r.pstate=pstate;
+
+    return v3_dev_ioctl(V3_DVFS_CTRL,&r);
+}
+
+int v3_user_dvfs_set_freq(uint32_t core, uint64_t freq_khz)
+{
+    struct v3_dvfs_ctrl_request r;
+
+    r.cmd=V3_DVFS_SETFREQ;
+    r.acq_type=V3_DVFS_EXTERNAL;
+    r.pcore=core;
+    r.freq_khz=freq_khz;
+    r.pstate=0;
+
+    return v3_dev_ioctl(V3_DVFS_CTRL,&r);
+}
+
diff --git a/linux_usr/v3_user_dvfs.h b/linux_usr/v3_user_dvfs.h
new file mode 100644
index 0000000..12e02e0
--- /dev/null
+++ b/linux_usr/v3_user_dvfs.h
@@ -0,0 +1,19 @@
+#ifndef _V3_USER_DVFS_
+#define _V3_USER_DVFS_
+
+#include <stdint.h>
+#include "v3_ctrl.h"
+#include "iface-pstate-ctrl.h"
+
+// Use these together
+int v3_user_dvfs_acquire_direct(uint32_t core); 
+int v3_user_dvfs_set_pstate(uint32_t core, uint8_t pstate);
+
+// Use these together
+int v3_user_dvfs_acquire_external(uint32_t core); 
+int v3_user_dvfs_set_freq(uint32_t core, uint64_t freq_khz);
+
+int v3_user_dvfs_release(uint32_t core); 
+
+#endif
+