libroot/os: Fix missing time funcs on riscv64

Change-Id: I291ebc949d63860e20eb609e4d3d2f600309d4e9
Reviewed-on: https://review.haiku-os.org/c/1553
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

src/system/libroot/os/arch/riscv64/Jamfile

@@ -13,7 +13,11 @@ for architectureObject in [ MultiArchSubDirSetup riscv64 ] {
 		SEARCH_SOURCE += [ FDirName $(SUBDIR) $(DOTDOT) generic ] ;
 
 		MergeObject <$(architecture)>os_arch_$(TARGET_ARCH).o :
+			stack_frame.c
+			system_time.c
+
 			tls.c
+			time.c
 			thread.c
 
 			generic_atomic.cpp

src/system/libroot/os/arch/riscv64/stack_frame.c

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2008, Ingo Weinhold, ingo_weinhold@gmx.de.
+ * Distributed under the terms of the MIT License.
+*/
+
+#include <SupportDefs.h>
+
+#include <libroot_private.h>
+
+
+void*
+get_stack_frame(void)
+{
+	// TODO: Implement!
+	return NULL;
+}
+
+
+void*
+__arch_get_caller(void)
+{
+	// TODO: Implement!
+	return NULL;
+}
+

src/system/libroot/os/arch/riscv64/system_time.c

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2012, Haiku, Inc.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		François Revol <revol@free.fr>
+ */
+
+#include <OS.h>
+
+#include <arch_cpu.h>
+#include <libroot_private.h>
+#include <real_time_data.h>
+
+static vint32 *sConversionFactor;
+
+//XXX: this is a hack
+// remove me when platform code works
+static int64
+__riscv64_get_time_base(void)
+{
+	static uint64 time_dilation_field = 0;
+	return time_dilation_field++;
+}
+
+bigtime_t
+system_time(void)
+{
+	uint64 timeBase = __riscv64_get_time_base();
+
+	uint32 cv = sConversionFactor ? *sConversionFactor : 0;
+	return (timeBase >> 32) * cv + (((timeBase & 0xffffffff) * cv) >> 32);
+}

src/system/libroot/os/arch/riscv64/time.c

@@ -0,0 +1,32 @@
+/* 
+ * Copyright 2006, Ingo Weinhold <bonefish@cs.tu-berlin.de>.
+ * Distributed under the terms of the MIT License.
+ */
+
+#include <OS.h>
+
+#include <arch_cpu.h>
+#include <libroot_private.h>
+#include <real_time_data.h>
+
+
+static struct arch_real_time_data *sRealTimeData;
+
+void
+__arch_init_time(struct real_time_data *data, bool setDefaults)
+{
+	sRealTimeData = &data->arch_data;
+
+	if (setDefaults) {
+		sRealTimeData->system_time_conversion_factor = 1000000000LL;
+	}
+
+	// __riscv64_setup_system_time(&sRealTimeData->system_time_conversion_factor);
+}
+
+
+bigtime_t
+__arch_get_system_time_offset(struct real_time_data *data)
+{
+	return 0;
+}