Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / post / cpu / mpc8xx / watchdog.c

diff --git a/qemu/roms/u-boot/post/cpu/mpc8xx/watchdog.c b/qemu/roms/u-boot/post/cpu/mpc8xx/watchdog.c
new file mode 100644 (file)
index 0000000..a070539
--- /dev/null
+++ b/qemu/roms/u-boot/post/cpu/mpc8xx/watchdog.c
@@ -0,0 +1,59 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+
+/*
+ * Watchdog test
+ *
+ * The test verifies the watchdog timer operation.
+ * On the first iteration, the test routine disables interrupts and
+ * makes a 10-second delay. If the system does not reboot during this delay,
+ * the watchdog timer is not operational and the test fails. If the system
+ * reboots, on the second iteration the test routine reports a success.
+ */
+
+#include <post.h>
+#include <watchdog.h>
+
+#if CONFIG_POST & CONFIG_SYS_POST_WATCHDOG
+
+static ulong gettbl (void)
+{
+       ulong r;
+
+  asm ("mftbl %0":"=r" (r));
+
+       return r;
+}
+
+int watchdog_post_test (int flags)
+{
+       if (flags & POST_REBOOT) {
+               /* Test passed */
+
+               return 0;
+       } else {
+               /* 10-second delay */
+               int ints = disable_interrupts ();
+               ulong base = gettbl ();
+               ulong clk = get_tbclk ();
+
+               while ((gettbl () - base) / 10 < clk);
+
+               if (ints)
+                       enable_interrupts ();
+
+               /*
+                * If we have reached this point, the watchdog timer
+                * does not work
+                */
+               return -1;
+       }
+}
+
+#endif /* CONFIG_POST & CONFIG_SYS_POST_WATCHDOG */