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authorMatt Fleming <matt.fleming@linux.intel.com>2011-05-25 08:39:47 +0100
committerMatt Fleming <matt.fleming@linux.intel.com>2011-05-25 08:44:48 +0100
commit565952b9d86d769471d500caab5ebba9bc36c363 (patch)
tree46ca624afd1d6997d4ebfb91345613b42deb5e70 /com32/elflink/ldlinux/advwrite.c
parenteecc876ef99deb4cf753db5b31d5eb1f83600b6c (diff)
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ldlinux: Add support for Auxillary Data Vector
Move all the code for the ADV into ldlinux so that it doesn't have any dependencies on other modules. We also need a way to initialize the ADV from ldlinux, so add another vector to the comboot API. Signed-off-by: Matt Fleming <matt.fleming@linux.intel.com>
Diffstat (limited to 'com32/elflink/ldlinux/advwrite.c')
-rw-r--r--com32/elflink/ldlinux/advwrite.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/com32/elflink/ldlinux/advwrite.c b/com32/elflink/ldlinux/advwrite.c
new file mode 100644
index 00000000..4152eea5
--- /dev/null
+++ b/com32/elflink/ldlinux/advwrite.c
@@ -0,0 +1,45 @@
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2007-2008 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.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * syslinux/advwrite.c
+ *
+ * Write back the ADV
+ */
+
+#include <syslinux/adv.h>
+#include <klibc/compiler.h>
+#include <com32.h>
+
+int syslinux_adv_write(void)
+{
+ static com32sys_t reg;
+
+ reg.eax.w[0] = 0x001d;
+ __intcall(0x22, &reg, &reg);
+ return (reg.eflags.l & EFLAGS_CF) ? -1 : 0;
+}