Add qemu 2.4.0

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

diff --git a/qemu/roms/u-boot/arch/arm/cpu/pxa/timer.c b/qemu/roms/u-boot/arch/arm/cpu/pxa/timer.c
new file mode 100644 (file)
index 0000000..c4717de
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/pxa/timer.c
@@ -0,0 +1,85 @@
+/*
+ * Marvell PXA2xx/3xx timer driver
+ *
+ * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <asm/arch/pxa-regs.h>
+#include <asm/io.h>
+#include <common.h>
+#include <div64.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define        TIMER_LOAD_VAL  0xffffffff
+
+#define        timestamp       (gd->arch.tbl)
+#define        lastinc         (gd->arch.lastinc)
+
+#if defined(CONFIG_CPU_PXA27X) || defined(CONFIG_CPU_MONAHANS)
+#define        TIMER_FREQ_HZ   3250000
+#elif defined(CONFIG_CPU_PXA25X)
+#define        TIMER_FREQ_HZ   3686400
+#else
+#error "Timer frequency unknown - please config PXA CPU type"
+#endif
+
+static unsigned long long tick_to_time(unsigned long long tick)
+{
+       return lldiv(tick * CONFIG_SYS_HZ, TIMER_FREQ_HZ);
+}
+
+static unsigned long long us_to_tick(unsigned long long us)
+{
+       return lldiv(us * TIMER_FREQ_HZ, 1000000);
+}
+
+int timer_init(void)
+{
+       writel(0, OSCR);
+       return 0;
+}
+
+unsigned long long get_ticks(void)
+{
+       /* Current tick value */
+       uint32_t now = readl(OSCR);
+
+       if (now >= lastinc) {
+               /*
+                * Normal mode (non roll)
+                * Move stamp forward with absolute diff ticks
+                */
+               timestamp += (now - lastinc);
+       } else {
+               /* We have rollover of incrementer */
+               timestamp += (TIMER_LOAD_VAL - lastinc) + now;
+       }
+
+       lastinc = now;
+       return timestamp;
+}
+
+ulong get_timer(ulong base)
+{
+       return tick_to_time(get_ticks()) - base;
+}
+
+void __udelay(unsigned long usec)
+{
+       unsigned long long tmp;
+       ulong tmo;
+
+       tmo = us_to_tick(usec);
+       tmp = get_ticks() + tmo;        /* get current timestamp */
+
+       while (get_ticks() < tmp)       /* loop till event */
+                /*NOP*/;
+}
+
+ulong get_tbclk(void)
+{
+       return TIMER_FREQ_HZ;
+}