Support for PC BIOS functions.

1 files changed, 113 insertions, 0 deletions

diff --git a/sys/i386/include/pc/bios.h b/sys/i386/include/pc/bios.h
new file mode 100644
index 0000000..96c7db6
--- /dev/null
+++ b/sys/i386/include/pc/bios.h
@@ -0,0 +1,113 @@
+/*-
+ * Copyright (c) 1997 Michael Smith
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *      $Id$
+ */
+
+/* 
+ * Signature structure for the BIOS32 Service Directory header 
+ */
+struct bios32_SDheader 
+{
+    u_int8_t	sig[4];
+    u_int32_t	entry;
+    u_int8_t	revision;
+    u_int8_t	len;
+    u_int8_t	cksum;
+    u_int8_t	pad[5];
+};
+
+/* 
+ * BIOS32 Service Directory entry.  Caller supplies name, bios32_SDlookup
+ * fills in the rest of the details.
+ */
+struct bios32_SDentry 
+{
+    union 
+    {
+	u_int8_t	name[4];	/* service identifier */
+	u_int32_t	id;		/* as a 32-bit value */
+    } ident;
+    u_int32_t	base;			/* base of service */
+    u_int32_t	len;			/* service length */
+    u_int32_t	entry;			/* entrypoint offset from base */
+};
+
+extern int		bios32_SDlookup(struct bios32_SDentry *ent);
+extern u_int32_t	bios_sigsearch(u_int32_t start, u_char *sig, int siglen, 
+					 int paralen, int sigofs);
+
+/*
+ * Call a 32-bit BIOS function
+ */
+struct bios32_args {
+    u_long eax;
+    u_long ebx;
+    u_long ecx;
+    u_long edx;
+};
+extern void		bios32(caddr_t func_addr, struct bios32_args *args);
+
+#define BIOS_PADDRTOVADDR(x)	(((x) - ISA_HOLE_START) + atdevbase)
+#define BIOS_VADDRTOPADDR(x)	(((x) - atdevbase) + ISA_HOLE_START)
+
+
+/*
+ * System Management BIOS / Desktop Management Interface tables
+ */
+
+struct DMI_table 
+{
+    u_int8_t	sig[5];			/* "_DMI_" */
+    u_int8_t	cksum;			/* checksum */
+    u_int16_t	st_size;		/* total length of SMBIOS table (bytes)*/
+    u_int32_t	st_base;		/* base address of the SMBIOS table (physical) */
+    u_int16_t	st_entries;		/* total number of structures present in the table */
+    u_int8_t	bcd_revision;		/* interface revision number */
+    u_int8_t	pad[2];
+};
+
+struct SMBIOS_table 
+{
+    u_int8_t	sig[4];			/* "_SM_" */
+    u_int8_t	cksum;			/* checksum */
+    u_int8_t	len;			/* structure length */
+    u_int8_t	major, minor;		/* major/minor revision numbers */
+    u_int16_t	st_maxsize;		/* largest structure size (bytes) */
+    u_int8_t	revision;		/* entrypoint revision */
+    u_int8_t	pad[5];
+    struct DMI_table dmi;		/* follows immediately */
+};
+
+
+/* 
+ * Exported lookup results 
+ */
+extern struct bios32_SDentry	PCIbios;
+extern struct SMBIOS_table	*SMBIOS_table;
+extern struct DMI_table		*DMI_table;
+
+
+