1 files changed, 92 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/arch/microblaze/cpu/timer.c b/qemu/roms/u-boot/arch/microblaze/cpu/timer.c
new file mode 100644
index 000000000..3960bbb08
--- /dev/null
+++ b/qemu/roms/u-boot/arch/microblaze/cpu/timer.c
@@ -0,0 +1,92 @@
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal  SIMEK <monstr@monstr.eu>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/microblaze_timer.h>
+#include <asm/microblaze_intc.h>
+
+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))
+			;
+	} else {
+		for (i = 0; i < (usec * XILINX_CLOCK_FREQ / 10000000); i++)
+			;
+	}
+}
+
+#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;
+
+#if defined(CONFIG_SYS_TIMER_0_ADDR) && defined(CONFIG_SYS_INTC_0_NUM)
+	preload = XILINX_CLOCK_FREQ / CONFIG_SYS_HZ;
+	irq = CONFIG_SYS_TIMER_0_IRQ;
+	tmr = (microblaze_timer_t *) (CONFIG_SYS_TIMER_0_ADDR);
+#endif
+
+	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;
+}