1 files changed, 70 insertions, 0 deletions
diff --git a/core/arch/arm32/kernel/tee_time_arm_generic_timer.c b/core/arch/arm32/kernel/tee_time_arm_generic_timer.c
new file mode 100644
index 0000000..be9df40
--- /dev/null
+++ b/core/arch/arm32/kernel/tee_time_arm_generic_timer.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2014, Linaro Limited
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ */
+
+#include <kernel/misc.h>
+#include <kernel/tee_time.h>
+#include <trace.h>
+#include <kernel/time_source.h>
+#include <mm/core_mmu.h>
+#include <utee_defines.h>
+#include <arm32.h>
+
+#include <assert.h>
+#include <stdint.h>
+#include <mpa.h>
+#include <arm32.h>
+
+static uint32_t do_div(uint64_t *dividend, uint32_t divisor)
+{
+	mpa_word_t remainder = 0, n0, n1;
+
+	n0 = (*dividend) & UINT_MAX;
+	n1 = ((*dividend) >> WORD_SIZE) & UINT_MAX;
+	*dividend = __mpa_div_dword(n0, n1, divisor, &remainder);
+	return remainder;
+}
+
+static TEE_Result arm_generic_timer_get_sys_time(TEE_Time *time)
+{
+	uint64_t cntpct = read_cntpct();
+	uint32_t cntfrq = read_cntfrq();
+	uint32_t remainder;
+
+	remainder = do_div(&cntpct, cntfrq);
+
+	time->seconds = (uint32_t)cntpct;
+	time->millis = remainder / (cntfrq / TEE_TIME_MILLIS_BASE);
+
+	return TEE_SUCCESS;
+}
+
+static const struct time_source arm_generic_timer_time_source = {
+	.name = "arm generic timer",
+	.get_sys_time = arm_generic_timer_get_sys_time,
+};
+
+REGISTER_TIME_SOURCE(arm_generic_timer_time_source)