[fsbl] add fsbl for cv181x/cv180x

Change-Id: I6809bc5016d4bc148f62be2ed3f8e928ec111f19

fsbl/lib/cpu/riscv/delay_timer.c

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <delay_timer.h>
+#include <platform.h>
+#include <mmio.h>
+#include "csr.h"
+
+#define SYS_COUNTER_FREQ_IN_US (SYS_COUNTER_FREQ_IN_SECOND / 1000000)
+
+static uint32_t 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_csr(time));
+}
+
+void trig_simulation_timer(uint32_t usec)
+{
+	uint32_t total_delta = (usec * SYS_COUNTER_FREQ_IN_US);
+
+	// Trig simulation bench to increse cntpct_el0
+	mmio_write_32(REG_GP_REG2, total_delta);
+}
+
+/***********************************************************
+ * Delay for the given number of microseconds. The driver must
+ * be initialized before calling this function.
+ ***********************************************************/
+void udelay(uint32_t usec)
+{
+	uint32_t start, delta, total_delta;
+
+	start = get_timer_value();
+
+	total_delta = (usec * SYS_COUNTER_FREQ_IN_US);
+
+	// Trig simulation bench to increse cntpct_el0
+	mmio_write_32(REG_GP_REG2, total_delta);
+
+	do {
+		/*
+		 * If the timer value wraps around, the subtraction will
+		 * overflow and it will still give the correct result.
+		 */
+		delta = start - get_timer_value(); /* Decreasing counter */
+
+	} while (delta < total_delta);
+}
+
+/***********************************************************
+ * Delay for the given number of milliseconds. The driver must
+ * be initialized before calling this function.
+ ***********************************************************/
+void mdelay(uint32_t msec)
+{
+	udelay(msec * 1000);
+}
+
+uint32_t get_timer(uint32_t base)
+{
+	if (base == 0)
+		return get_timer_value();
+	else
+		return (base - get_timer_value()) / SYS_COUNTER_FREQ_IN_US / 1000; // ms
+}
+
+uint32_t get_random_from_timer(uint32_t base)
+{
+	if (base == 0)
+		return get_timer_value();
+	else
+		return (base - get_timer_value()) / SYS_COUNTER_FREQ_IN_US % 100000;
+}
+
+void timer_init(void)
+{
+//	write_cntfrq_el0(SYS_COUNTER_FREQ_IN_SECOND);
+}
+
+uint32_t read_count_tick(void)
+{
+	return read_csr(time) / SYS_COUNTER_FREQ_IN_US;
+//	return read_cntpct_el0() / SYS_COUNTER_FREQ_IN_US;
+}