Add syslinux_reboot()

1 files changed, 47 insertions, 0 deletions

diff --git a/com32/lib/syslinux/reboot.c b/com32/lib/syslinux/reboot.c
new file mode 100644
index 00000000..32905cb9
--- /dev/null
+++ b/com32/lib/syslinux/reboot.c
@@ -0,0 +1,47 @@
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 2007 H. Peter Anvin - All Rights Reserved
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *   
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *   
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * reboot.c
+ *
+ * Provoke a system reboot
+ */
+
+#include <stddef.h>
+#include <com32.h>
+#include <syslinux/reboot.h>
+
+__noreturn syslinux_reboot(int warm)
+{
+  uint16_t * const reboot_flag = (uint16_t *)0x472;
+  
+  *reboot_flag = warm ? 0x1234 : 0;
+  __farcall(0xf000, 0xfff0, &__com32_zero_regs, NULL);
+
+  while(1)
+    asm volatile("hlt");
+}