Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / arm / cpu / sa1100 / timer.c

diff --git a/qemu/roms/u-boot/arch/arm/cpu/sa1100/timer.c b/qemu/roms/u-boot/arch/arm/cpu/sa1100/timer.c
new file mode 100644 (file)
index 0000000..0a0006b
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/sa1100/timer.c
@@ -0,0 +1,73 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <SA-1100.h>
+
+ulong get_timer (ulong base)
+{
+       return get_timer_masked ();
+}
+
+void __udelay (unsigned long usec)
+{
+       udelay_masked (usec);
+}
+
+ulong get_timer_masked (void)
+{
+       return OSCR;
+}
+
+void udelay_masked (unsigned long usec)
+{
+       ulong tmo;
+       ulong endtime;
+       signed long diff;
+
+       if (usec >= 1000) {
+               tmo = usec / 1000;
+               tmo *= CONFIG_SYS_HZ;
+               tmo /= 1000;
+       } else {
+               tmo = usec * CONFIG_SYS_HZ;
+               tmo /= (1000*1000);
+       }
+
+       endtime = get_timer_masked () + tmo;
+
+       do {
+               ulong now = get_timer_masked ();
+               diff = endtime - now;
+       } while (diff >= 0);
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM 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 ARM it returns the number of timer ticks per second.
+ */
+ulong get_tbclk (void)
+{
+       ulong tbclk;
+
+       tbclk = CONFIG_SYS_HZ;
+       return tbclk;
+}