diff options
author | H. Peter Anvin <hpa@zytor.com> | 2007-07-11 12:18:51 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-12 10:55:55 -0700 |
commit | 337496eb73ec970fe008095fdb2b2af60a2a7fa3 (patch) | |
tree | 9a2ae52b83a3283a6dd48e765211882c0928bc1d /arch/i386 | |
parent | 449f2ab946b5ffbc357d815e8e3cce8def642984 (diff) |
Voyager support for the new x86 setup code
Voyager support for the new x86 setup code. This implements the same
functionality as the assembly version.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/i386')
-rw-r--r-- | arch/i386/boot/voyager.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/i386/boot/voyager.c b/arch/i386/boot/voyager.c new file mode 100644 index 00000000000..9221614d0db --- /dev/null +++ b/arch/i386/boot/voyager.c @@ -0,0 +1,46 @@ +/* -*- linux-c -*- ------------------------------------------------------- * + * + * Copyright (C) 1991, 1992 Linus Torvalds + * Copyright 2007 rPath, Inc. - All Rights Reserved + * + * This file is part of the Linux kernel, and is made available under + * the terms of the GNU General Public License version 2. + * + * ----------------------------------------------------------------------- */ + +/* + * arch/i386/boot/voyager.c + * + * Get the Voyager config information + */ + +#include "boot.h" + +#ifdef CONFIG_X86_VOYAGER + +int query_voyager(void) +{ + u8 err; + u16 es, di; + /* Abuse the apm_bios_info area for this */ + u8 *data_ptr = (u8 *)&boot_params.apm_bios_info; + + data_ptr[0] = 0xff; /* Flag on config not found(?) */ + + asm("pushw %%es ; " + "int $0x15 ; " + "setc %0 ; " + "movw %%es, %1 ; " + "popw %%es" + : "=qm" (err), "=rm" (es), "=D" (di) + : "a" (0xffc0)); + + if (err) + return -1; /* Not Voyager */ + + set_fs(es); + copy_from_fs(data_ptr, di, 7); /* Table is 7 bytes apparently */ + return 0; +} + +#endif /* CONFIG_X86_VOYAGER */ |