Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / bootcount / bootcount_davinci.c

diff --git a/qemu/roms/u-boot/drivers/bootcount/bootcount_davinci.c b/qemu/roms/u-boot/drivers/bootcount/bootcount_davinci.c
new file mode 100644 (file)
index 0000000..fa87b5e
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/bootcount/bootcount_davinci.c
@@ -0,0 +1,42 @@
+/*
+ * (C) Copyright 2011
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * A bootcount driver for the RTC IP block found on many TI platforms.
+ * This requires the RTC clocks, etc, to be enabled prior to use and
+ * not all boards with this IP block on it will have the RTC in use.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <bootcount.h>
+#include <asm/davinci_rtc.h>
+
+void bootcount_store(ulong a)
+{
+       struct davinci_rtc *reg =
+               (struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
+
+       /*
+        * write RTC kick register to enable write
+        * for RTC Scratch registers. Scratch0 and 1 are
+        * used for bootcount values.
+        */
+       writel(RTC_KICK0R_WE, &reg->kick0r);
+       writel(RTC_KICK1R_WE, &reg->kick1r);
+       raw_bootcount_store(&reg->scratch2,
+                           (BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff));
+}
+
+ulong bootcount_load(void)
+{
+       unsigned long val;
+       struct davinci_rtc *reg =
+               (struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
+
+       val = raw_bootcount_load(&reg->scratch2);
+       if ((val & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
+               return 0;
+       else
+               return val & 0x0000ffff;
+}