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

2026-09-06 03:52:57 +08:00
commit b1928b41c0
21813 changed files with 4413081 additions and 0 deletions
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+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <lib/mmio.h>
+#include <mcucfg.h>
+#include <mt_timer.h>
+#include <platform_def.h>
+
+static void enable_systimer_compensation(void)
+{
+	unsigned int reg;
+
+	reg = mmio_read_32(CNTCR_REG);
+	reg &= ~COMP_15_EN;
+	reg |= COMP_20_EN;
+	mmio_write_32(CNTCR_REG, reg);
+
+	NOTICE("[systimer] CNTCR_REG(0x%x)\n", mmio_read_32(CNTCR_REG));
+}
+
+void mt_systimer_init(void)
+{
+	/* systimer is default on, so we only enable systimer compensation */
+	enable_systimer_compensation();
+}
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef MT_TIMER_H
+#define MT_TIMER_H
+
+
+#define SYSTIMER_BASE       (0x10017000)
+#define CNTCR_REG           (SYSTIMER_BASE + 0x0)
+#define CNTSR_REG           (SYSTIMER_BASE + 0x4)
+
+#define COMP_15_EN          (1 << 10)
+#define COMP_20_EN          (1 << 11)
+
+void mt_systimer_init(void);
+
+#endif /* MT_TIMER_H */