1 files changed, 49 insertions, 0 deletions
diff --git a/plat/intel/soc/common/socfpga_delay_timer.c b/plat/intel/soc/common/socfpga_delay_timer.c
new file mode 100644
index 0000000..dcd51e2
--- /dev/null
+++ b/plat/intel/soc/common/socfpga_delay_timer.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2019-2022, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <arch_helpers.h>
+#include <drivers/delay_timer.h>
+#include <lib/mmio.h>
+#include "socfpga_plat_def.h"
+
+#define SOCFPGA_GLOBAL_TIMER		0xffd01000
+#define SOCFPGA_GLOBAL_TIMER_EN		0x3
+
+static timer_ops_t plat_timer_ops;
+/********************************************************************
+ * The timer delay function
+ ********************************************************************/
+static uint32_t socfpga_get_timer_value(void)
+{
+	/*
+	 * Generic delay timer implementation expects the timer to be a down
+	 * counter. We apply bitwise NOT operator to the tick values returned
+	 * by read_cntpct_el0() to simulate the down counter. The value is
+	 * clipped from 64 to 32 bits.
+	 */
+	return (uint32_t)(~read_cntpct_el0());
+}
+
+void socfpga_delay_timer_init_args(void)
+{
+	plat_timer_ops.get_timer_value	= socfpga_get_timer_value;
+	plat_timer_ops.clk_mult		= 1;
+	plat_timer_ops.clk_div		= PLAT_SYS_COUNTER_FREQ_IN_MHZ;
+
+	timer_init(&plat_timer_ops);
+
+}
+
+void socfpga_delay_timer_init(void)
+{
+	socfpga_delay_timer_init_args();
+	mmio_write_32(SOCFPGA_GLOBAL_TIMER, SOCFPGA_GLOBAL_TIMER_EN);
+
+	asm volatile("msr cntp_ctl_el0, %0" : : "r" (SOCFPGA_GLOBAL_TIMER_EN));
+	asm volatile("msr cntp_tval_el0, %0" : : "r" (~0));
+
+}