core: add a direct 32-bit API

Add a direct 32-bit API to some functions; initially read file only.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

2 files changed, 49 insertions, 1 deletions

diff --git a/com32/include/com32.h b/com32/include/com32.h
index aa7fb4b6..9334efb8 100644
--- a/com32/include/com32.h
+++ b/com32/include/com32.h
@@ -1,7 +1,7 @@
 /* ----------------------------------------------------------------------- *
  *
  *   Copyright 2002-2009 H. Peter Anvin - All Rights Reserved
- *   Copyright 2009 Intel Corporation; author: H. Peter Anvin
+ *   Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin
  *
  *   Permission is hereby granted, free of charge, to any person
  *   obtaining a copy of this software and associated documentation
@@ -92,6 +92,8 @@ typedef struct {
 #define EFLAGS_VIP		0x00100000
 #define EFLAGS_ID		0x00200000
 
+struct com32_pmapi;
+
 extern struct com32_sys_args {
     uint32_t cs_sysargs;
     char *cs_cmdline;
@@ -101,6 +103,7 @@ extern struct com32_sys_args {
     void __cdecl(*cs_farcall) (uint32_t, const com32sys_t *, com32sys_t *);
     int __cdecl(*cs_cfarcall) (uint32_t, const void *, uint32_t);
     uint32_t cs_memsize;
+    const struct com32_pmapi *cs_pm;
 } __com32;
 
 /*
diff --git a/com32/include/syslinux/pmapi.h b/com32/include/syslinux/pmapi.h
new file mode 100644
index 00000000..848a5540
--- /dev/null
+++ b/com32/include/syslinux/pmapi.h
@@ -0,0 +1,45 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2002-2009 H. Peter Anvin - All Rights Reserved
+ *   Copyright 2009 Intel Corporation; author: H. Peter Anvin
+ *
+ *   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.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * pmapi.h
+ *
+ * Definitions for the Syslinux 4 protected-mode ABI
+ */
+
+#ifndef _SYSLINUX_PMAPI_H
+#define _SYSLINUX_PMAPI_H
+
+#include <stddef.h>
+#include <inttypes.h>
+
+struct com32_pmapi {
+    size_t (*read_file)(uint16_t *, void *, size_t);
+};
+
+#endif /* _SYSLINUX_PMAPI_H */