Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 123 insertions, 0 deletions

diff --git a/roms/u-boot/arch/microblaze/cpu/timer.c b/roms/u-boot/arch/microblaze/cpu/timer.c
new file mode 100644
index 000000000..647bdcd5b
--- /dev/null
+++ b/roms/u-boot/arch/microblaze/cpu/timer.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal  SIMEK <monstr@monstr.eu>
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <init.h>
+#include <log.h>
+#include <time.h>
+#include <asm/global_data.h>
+#include <asm/microblaze_timer.h>
+#include <asm/microblaze_intc.h>
+#include <linux/delay.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+volatile int timestamp = 0;
+microblaze_timer_t *tmr;
+
+ulong get_timer (ulong base)
+{
+	if (tmr)
+		return timestamp - base;
+	return timestamp++ - base;
+}
+
+void __udelay(unsigned long usec)
+{
+	u32 i;
+
+	if (tmr) {
+		i = get_timer(0);
+		while ((get_timer(0) - i) < (usec / 1000))
+			;
+	}
+}
+
+#ifndef CONFIG_SPL_BUILD
+static void timer_isr(void *arg)
+{
+	timestamp++;
+	tmr->control = tmr->control | TIMER_INTERRUPT;
+}
+
+int timer_init (void)
+{
+	int irq = -1;
+	u32 preload = 0;
+	u32 ret = 0;
+	const void *blob = gd->fdt_blob;
+	int node = 0;
+	u32 cell[2];
+
+	debug("TIMER: Initialization\n");
+
+	/* Do not init before relocation */
+	if (!(gd->flags & GD_FLG_RELOC))
+		return 0;
+
+	node = fdt_node_offset_by_compatible(blob, node,
+				"xlnx,xps-timer-1.00.a");
+	if (node != -1) {
+		fdt_addr_t base = fdtdec_get_addr(blob, node, "reg");
+		if (base == FDT_ADDR_T_NONE)
+			return -1;
+
+		debug("TIMER: Base addr %lx\n", base);
+		tmr = (microblaze_timer_t *)base;
+
+		ret = fdtdec_get_int_array(blob, node, "interrupts",
+					    cell, ARRAY_SIZE(cell));
+		if (ret)
+			return ret;
+
+		irq = cell[0];
+		debug("TIMER: IRQ %x\n", irq);
+
+		preload = fdtdec_get_int(blob, node, "clock-frequency", 0);
+		preload /= CONFIG_SYS_HZ;
+	} else {
+		return node;
+	}
+
+	if (tmr && preload && irq >= 0) {
+		tmr->loadreg = preload;
+		tmr->control = TIMER_INTERRUPT | TIMER_RESET;
+		tmr->control = TIMER_ENABLE | TIMER_ENABLE_INTR |\
+					TIMER_RELOAD | TIMER_DOWN_COUNT;
+		timestamp = 0;
+		ret = install_interrupt_handler (irq, timer_isr, (void *)tmr);
+		if (ret)
+			tmr = NULL;
+	}
+	/* No problem if timer is not found/initialized */
+	return 0;
+}
+#else
+int timer_init(void)
+{
+	return 0;
+}
+#endif
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On Microblaze it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On Microblaze it returns the number of timer ticks per second.
+ */
+ulong get_tbclk(void)
+{
+	return CONFIG_SYS_HZ;
+}