GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/arm/mach-socfpga/timer.c

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  Copyright (C) 2012 Altera Corporation <www.altera.com>
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/timer.h>
+
+#define TIMER_LOAD_VAL		0xFFFFFFFF
+
+static const struct socfpga_timer *timer_base = (void *)CONFIG_SYS_TIMERBASE;
+
+/*
+ * Timer initialization
+ */
+int timer_init(void)
+{
+	writel(TIMER_LOAD_VAL, &timer_base->load_val);
+	writel(TIMER_LOAD_VAL, &timer_base->curr_val);
+	writel(readl(&timer_base->ctrl) | 0x3, &timer_base->ctrl);
+	return 0;
+}