Add qemu 2.4.0

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

diff --git a/qemu/roms/u-boot/arch/arm/cpu/armv7/omap-common/utils.c b/qemu/roms/u-boot/arch/arm/cpu/armv7/omap-common/utils.c
new file mode 100644 (file)
index 0000000..1696c2d
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/armv7/omap-common/utils.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2011 Linaro Limited
+ * Aneesh V <aneesh@ti.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+#include <common.h>
+#include <asm/arch/sys_proto.h>
+static void do_cancel_out(u32 *num, u32 *den, u32 factor)
+{
+       while (1) {
+               if (((*num)/factor*factor == (*num)) &&
+                  ((*den)/factor*factor == (*den))) {
+                       (*num) /= factor;
+                       (*den) /= factor;
+               } else
+                       break;
+       }
+}
+
+/*
+ * Cancel out the denominator and numerator of a fraction
+ * to get smaller numerator and denominator.
+ */
+void cancel_out(u32 *num, u32 *den, u32 den_limit)
+{
+       do_cancel_out(num, den, 2);
+       do_cancel_out(num, den, 3);
+       do_cancel_out(num, den, 5);
+       do_cancel_out(num, den, 7);
+       do_cancel_out(num, den, 11);
+       do_cancel_out(num, den, 13);
+       do_cancel_out(num, den, 17);
+       while ((*den) > den_limit) {
+               *num /= 2;
+               /*
+                * Round up the denominator so that the final fraction
+                * (num/den) is always <= the desired value
+                */
+               *den = (*den + 1) / 2;
+       }
+}
+
+void __weak usb_fake_mac_from_die_id(u32 *id)
+{
+       uint8_t device_mac[6];
+
+       if (!getenv("usbethaddr")) {
+               /*
+                * create a fake MAC address from the processor ID code.
+                * first byte is 0x02 to signify locally administered.
+                */
+               device_mac[0] = 0x02;
+               device_mac[1] = id[3] & 0xff;
+               device_mac[2] = id[2] & 0xff;
+               device_mac[3] = id[1] & 0xff;
+               device_mac[4] = id[0] & 0xff;
+               device_mac[5] = (id[0] >> 8) & 0xff;
+
+               eth_setenv_enetaddr("usbethaddr", device_mac);
+       }
+}