1 files changed, 94 insertions, 0 deletions
diff --git a/src/zenmonitor-lib.c b/src/zenmonitor-lib.c
new file mode 100644
index 0000000..dded8f3
--- /dev/null
+++ b/src/zenmonitor-lib.c
@@ -0,0 +1,94 @@
+#include <cpuid.h>
+
+#include "zenpower.h"
+#include "msr.h"
+#include "os.h"
+#include "zenmonitor.h"
+
+#define AMD_STRING "AuthenticAMD"
+#define ZEN_FAMILY 0x17
+
+// AMD PPR = https://www.amd.com/system/files/TechDocs/54945_PPR_Family_17h_Models_00h-0Fh.pdf
+
+gboolean check_zen() {
+    guint32 eax = 0, ebx = 0, ecx = 0, edx = 0, ext_family;
+    char vendor[13];
+
+    __get_cpuid(0, &eax, &ebx, &ecx, &edx);
+
+    memcpy(vendor, &ebx, 4);
+    memcpy(vendor+4, &edx, 4);
+    memcpy(vendor+8, &ecx, 4);
+    vendor[12] = 0;
+
+    if (strcmp(vendor, AMD_STRING) != 0){
+        return FALSE;
+    }
+
+    __get_cpuid(1, &eax, &ebx, &ecx, &edx);
+
+    ext_family = ((eax >> 8) & 0xF) + ((eax >> 20) & 0xFF);
+    if (ext_family != ZEN_FAMILY){
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
+gchar *cpu_model() {
+    guint32 eax = 0, ebx = 0, ecx = 0, edx = 0;
+    char model[48];
+
+    // AMD PPR: page 65-68 - CPUID_Fn80000002_EAX-CPUID_Fn80000004_EDX
+    __get_cpuid(0x80000002, &eax, &ebx, &ecx, &edx);
+    memcpy(model, &eax, 4);
+    memcpy(model+4, &ebx, 4);
+    memcpy(model+8, &ecx, 4);
+    memcpy(model+12, &edx, 4);
+
+    __get_cpuid(0x80000003, &eax, &ebx, &ecx, &edx);
+    memcpy(model+16, &eax, 4);
+    memcpy(model+20, &ebx, 4);
+    memcpy(model+24, &ecx, 4);
+    memcpy(model+28, &edx, 4);
+
+    __get_cpuid(0x80000004, &eax, &ebx, &ecx, &edx);
+    memcpy(model+32, &eax, 4);
+    memcpy(model+36, &ebx, 4);
+    memcpy(model+40, &ecx, 4);
+    memcpy(model+44, &edx, 4);
+
+    model[48] = 0;
+    return g_strdup(g_strchomp(model));
+}
+
+guint get_core_count() {
+    guint eax = 0, ebx = 0, ecx = 0, edx = 0;
+    guint logical_cpus, threads_per_code;
+
+    // AMD PPR: page 57 - CPUID_Fn00000001_EBX
+    __get_cpuid(1, &eax, &ebx, &ecx, &edx);
+    logical_cpus = (ebx >> 16) & 0xFF;
+
+    // AMD PPR: page 82 - CPUID_Fn8000001E_EBX
+    __get_cpuid(0x8000001E, &eax, &ebx, &ecx, &edx);
+    threads_per_code = ((ebx >> 8) & 0xF) + 1;
+
+    if (threads_per_code == 0)
+        return logical_cpus;
+
+    return logical_cpus / threads_per_code;
+}
+
+SensorInit *sensor_init_new() {
+    return g_new0(SensorInit, 1);
+}
+
+void sensor_init_free(SensorInit *s) {
+    if (s) {
+        g_free(s->label);
+        g_free(s->hint);
+        g_free(s);
+    }
+}
+