OpenSBI: Added IPI extension

kernel/drivers/opensbi/extensions/ipi.cpp

@@ -0,0 +1,28 @@
+#include "opensbi/extensions/ipi.h"
+
+namespace drivers {
+namespace opensbi::ipi {
+
+    namespace {
+        enum class ExtensionId {
+            IPI = 0x735049
+        };
+
+        enum class FunctionId {
+            SEND_IPI
+        };
+    }
+
+    SbiRet send_ipi(
+            unsigned long hart_mask,
+            unsigned long hart_mask_base) {
+        return ecall(
+            static_cast<sbiword_t>(ExtensionId::IPI),
+            static_cast<sbiword_t>(FunctionId::SEND_IPI),
+            hart_mask,
+            hart_mask_base);
+    }
+
+}  // End namespace opensbi::ipi
+}  // End namespace drivers
+

kernel/drivers/opensbi/include/opensbi/extensions/ipi.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "opensbi/opensbi.h"
+
+namespace drivers {
+namespace opensbi::ipi {
+
+    SbiRet send_ipi(
+        unsigned long hart_mask,
+        unsigned long hart_mask_base);
+
+}  // End namespace opensbi::ipi
+}  // End namespace drivers

kernel/drivers/opensbi/meson.build

@@ -3,7 +3,8 @@ kernel_sources += [
         'opensbi.cpp',
         'extensions/legacy.cpp',
         'extensions/base.cpp',
-        'extensions/timer.cpp'
+        'extensions/timer.cpp',
+        'extensions/ipi.cpp'
     ),
 ]