Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / arm / cpu / armv7 / arch_timer.c

diff --git a/qemu/roms/u-boot/arch/arm/cpu/armv7/arch_timer.c b/qemu/roms/u-boot/arch/arm/cpu/armv7/arch_timer.c
new file mode 100644 (file)
index 0000000..0588e2b
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/armv7/arch_timer.c
@@ -0,0 +1,58 @@
+/*
+ * (C) Copyright 2012-2014
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <div64.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int timer_init(void)
+{
+       gd->arch.tbl = 0;
+       gd->arch.tbu = 0;
+
+       gd->arch.timer_rate_hz = CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ;
+
+       return 0;
+}
+
+unsigned long long get_ticks(void)
+{
+       ulong nowl, nowu;
+
+       asm volatile("mrrc p15, 0, %0, %1, c14" : "=r" (nowl), "=r" (nowu));
+
+       gd->arch.tbl = nowl;
+       gd->arch.tbu = nowu;
+
+       return (((unsigned long long)gd->arch.tbu) << 32) | gd->arch.tbl;
+}
+
+
+ulong get_timer(ulong base)
+{
+       return lldiv(get_ticks(), gd->arch.timer_rate_hz) - base;
+}
+
+void __udelay(unsigned long usec)
+{
+       unsigned long long endtime;
+
+       endtime = lldiv((unsigned long long)usec * gd->arch.timer_rate_hz,
+                       1000UL);
+
+       endtime += get_ticks();
+
+       while (get_ticks() < endtime)
+               ;
+}
+
+ulong get_tbclk(void)
+{
+       return gd->arch.timer_rate_hz;
+}