1 files changed, 79 insertions, 0 deletions
diff --git a/src/soc/cavium/cn81xx/clock.c b/src/soc/cavium/cn81xx/clock.c
new file mode 100644
index 0000000000..bd6514cd41
--- /dev/null
+++ b/src/soc/cavium/cn81xx/clock.c
@@ -0,0 +1,79 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018       Facebook, Inc.
+ * Copyright 2003-2017  Cavium Inc.  <support@cavium.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <soc/clock.h>
+#include <arch/io.h>
+#include <soc/addressmap.h>
+
+#define PLL_REF_CLK	50000000	/* 50 MHz */
+
+union cavm_rst_boot {
+	u64 u;
+	struct {
+		u64 rboot_pin:1;
+		u64 rboot:1;
+		u64 lboot:10;
+		u64 lboot_ext23:6;
+		u64 lboot_ext45:6;
+		u64 reserved_24_29:6;
+		u64 lboot_oci:3;
+		u64 pnr_mul:6;
+		u64 reserved_39_39:1;
+		u64 c_mul:7;
+		u64 reserved_47_54:8;
+		u64 dis_scan:1;
+		u64 dis_huk:1;
+		u64 vrm_err:1;
+		u64 jt_tstmode:1;
+		u64 ckill_ppdis:1;
+		u64 trusted_mode:1;
+		u64 ejtagdis:1;
+		u64 jtcsrdis:1;
+		u64 chipkill:1;
+	} s;
+};
+
+/**
+ * Returns the reference clock speed in Hz
+ */
+u64 thunderx_get_ref_clock(void)
+{
+	return PLL_REF_CLK;
+}
+
+
+/**
+ * Returns the I/O clock speed in Hz
+ */
+u64 thunderx_get_io_clock(void)
+{
+	union cavm_rst_boot rst_boot;
+
+	rst_boot.u = read64((void *)RST_PF_BAR0);
+
+	return rst_boot.s.pnr_mul * PLL_REF_CLK;
+}
+
+/**
+ * Returns the core clock speed in Hz
+ */
+u64 thunderx_get_core_clock(void)
+{
+	union cavm_rst_boot rst_boot;
+
+	rst_boot.u = read64((void *)RST_PF_BAR0);
+
+	return rst_boot.s.c_mul * PLL_REF_CLK;
+}