1 files changed, 71 insertions, 0 deletions
diff --git a/plat/brcm/board/common/timer_sync.c b/plat/brcm/board/common/timer_sync.c
new file mode 100644
index 0000000..7e33a94
--- /dev/null
+++ b/plat/brcm/board/common/timer_sync.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2015 - 2020, Broadcom
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <lib/mmio.h>
+
+#include <platform_def.h>
+#include <timer_sync.h>
+
+/*******************************************************************************
+ * Defines related to time sync and satelite timers
+ ******************************************************************************/
+#define TIME_SYNC_WR_ENA	((uint32_t)0xACCE55 << 8)
+#define IHOST_STA_TMR_CTRL	0x1800
+#define IHOST_SAT_TMR_INC_L	0x1814
+#define IHOST_SAT_TMR_INC_H	0x1818
+
+#define SAT_TMR_CYCLE_DELAY	2
+#define SAT_TMR_32BIT_WRAP_VAL	(BIT_64(32) - SAT_TMR_CYCLE_DELAY)
+
+void ihost_enable_satellite_timer(unsigned int cluster_id)
+{
+	uintptr_t ihost_base;
+	uint32_t time_lx, time_h;
+	uintptr_t ihost_enable;
+
+	VERBOSE("Program iHost%u satellite timer\n", cluster_id);
+	ihost_base = IHOST0_BASE + cluster_id * IHOST_ADDR_SPACE;
+
+	/* this read starts the satellite timer counting from 0 */
+	ihost_enable = CENTRAL_TIMER_GET_IHOST_ENA_BASE + cluster_id * 4;
+	time_lx = mmio_read_32(ihost_enable);
+
+	/*
+	 * Increment the satellite timer by the central timer plus 2
+	 * to accommodate for a 1 cycle delay through NOC
+	 * plus counter starting from 0.
+	 */
+	mmio_write_32(ihost_base + IHOST_SAT_TMR_INC_L,
+		      time_lx + SAT_TMR_CYCLE_DELAY);
+
+	/*
+	 * Read the latched upper data, if lx will wrap by adding 2 to it
+	 * we need to handle the wrap
+	 */
+	time_h = mmio_read_32(CENTRAL_TIMER_GET_H);
+	if (time_lx >= SAT_TMR_32BIT_WRAP_VAL)
+		mmio_write_32(ihost_base + IHOST_SAT_TMR_INC_H, time_h + 1);
+	else
+		mmio_write_32(ihost_base + IHOST_SAT_TMR_INC_H, time_h);
+}
+
+void brcm_timer_sync_init(void)
+{
+	unsigned int cluster_id;
+
+	/* Get the Time Sync module out of reset */
+	mmio_setbits_32(CDRU_MISC_RESET_CONTROL,
+			BIT(CDRU_MISC_RESET_CONTROL_TS_RESET_N));
+
+	/* Deassert the Central Timer TIMER_EN signal for all module */
+	mmio_write_32(CENTRAL_TIMER_SAT_TMR_ENA, TIME_SYNC_WR_ENA);
+
+	/* enables/programs iHost0 satellite timer*/
+	cluster_id = MPIDR_AFFLVL1_VAL(read_mpidr());
+	ihost_enable_satellite_timer(cluster_id);
+}