Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / nds32 / cpu / n1213 / ag101 / watchdog.S

diff --git a/qemu/roms/u-boot/arch/nds32/cpu/n1213/ag101/watchdog.S b/qemu/roms/u-boot/arch/nds32/cpu/n1213/ag101/watchdog.S
new file mode 100644 (file)
index 0000000..8442241
--- /dev/null
+++ b/qemu/roms/u-boot/arch/nds32/cpu/n1213/ag101/watchdog.S
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <asm/arch-ag101/ag101.h>
+#include <linux/linkage.h>
+
+.text
+
+#ifndef CONFIG_SKIP_TRUNOFF_WATCHDOG
+ENTRY(turnoff_watchdog)
+
+#define WD_CR          0xC
+#define WD_ENABLE      0x1
+
+       ! Turn off the watchdog, according to Faraday FTWDT010 spec
+       li      $p0, (CONFIG_FTWDT010_BASE+WD_CR)       ! Get the addr of WD CR
+       lwi     $p1, [$p0]                              ! Get the config of WD
+       andi    $p1, $p1, 0x1f                          ! Wipe out useless bits
+       li      $r0, ~WD_ENABLE
+       and     $p1, $p1, $r0                           ! Set WD disable
+       sw      $p1, [$p0]                              ! Write back to WD CR
+
+       ! Disable Interrupts by clear GIE in $PSW reg
+       setgie.d
+
+       ret
+
+ENDPROC(turnoff_watchdog)
+#endif