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Markup: .Fn instead of .Nm, .Tn, offset indent, newline for a new sentence.

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jruoho 2010-05-05 05:49:38 +00:00
parent 4a4dc62ed5
commit 50ad9a0506
1 changed files with 38 additions and 22 deletions
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60
share/man/man9/man9.i386/bioscall.9
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@ -1,4 +1,4 @@
.\" $NetBSD: bioscall.9,v 1.8 2008/04/30 13:10:59 martin Exp $ .\" $NetBSD: bioscall.9,v 1.9 2010/05/05 05:49:38 jruoho Exp $
.\" .\"
.\" Copyright (c) 1998 The NetBSD Foundation, Inc. .\" Copyright (c) 1998 The NetBSD Foundation, Inc.
.\" All rights reserved. .\" All rights reserved.
@ -27,7 +27,7 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE. .\" POSSIBILITY OF SUCH DAMAGE.
.\" .\"
.Dd October 1, 1998 .Dd May 5, 2010
.Dt BIOSCALL 9 i386 .Dt BIOSCALL 9 i386
.Os .Os
.Sh NAME .Sh NAME
@ -39,9 +39,10 @@
.Fn bioscall "int function" "struct bioscallregs *regs" .Fn bioscall "int function" "struct bioscallregs *regs"
.Sh DESCRIPTION .Sh DESCRIPTION
The The
.Nm .Fn bioscall
function switches the processor into real mode, calls the BIOS interrupt function switches the processor into real mode, calls the
numbered .Tn BIOS
interrupt numbered
.Fa function , .Fa function ,
and returns to protected mode. and returns to protected mode.
.Pp .Pp
@ -50,10 +51,13 @@ bootstrap when necessary to probe devices or pseudo-devices.
.Pp .Pp
The register values specified by The register values specified by
.Fa *regs .Fa *regs
(with one exception) are installed before the BIOS interrupt is called. (with one exception) are installed before the
The processor flags are handled specially. Only the following flags are .Tn BIOS
passed to the interrupt is called.
BIOS from the registers in The processor flags are handled specially.
Only the following flags are passed to the
.Tn BIOS
from the registers in
.Fa regs .Fa regs
(the remainder come from the processor's flags register at the time (the remainder come from the processor's flags register at the time
of the call): of the call):
@ -71,23 +75,32 @@ structure is defined to contain structures for each register, to allow
access to 32-, 16- or 8-bit wide sections of the registers. access to 32-, 16- or 8-bit wide sections of the registers.
Definitions are provided which simplify access to the union members. Definitions are provided which simplify access to the union members.
.Sh RETURN VALUES .Sh RETURN VALUES
.Nm The
fills in .Fn bioscall
function fills in
.Fa *regs .Fa *regs
with the processor registers as returned from the BIOS call. with the processor registers as returned from the
.Tn BIOS
call.
.Sh EXAMPLES .Sh EXAMPLES
The Advanced Power Management driver calls The Advanced Power Management driver calls
.Nm .Fn bioscall
by setting up a register structure with the APM installation check and by setting up a register structure with the
device types in registers .Tn APM
installation check and device types in registers
.Fa ax .Fa ax
and and
.Fa bx , .Fa bx ,
then calls the BIOS to fetch the details for calling the APM support then calls the
through a protected-mode interface. The BIOS returns these details in .Tn BIOS
the registers: to fetch the details for calling the
.Tn APM
support through a protected-mode interface.
The
.Tn BIOS
returns these details in the registers:
.Pp .Pp
.Bd -literal .Bd -literal -offset indent
#include \*[Lt]i386/bioscall.h\*[Gt] #include \*[Lt]i386/bioscall.h\*[Gt]
#include \*[Lt]i386/apmvar.h\*[Gt] #include \*[Lt]i386/apmvar.h\*[Gt]
struct bioscallregs regs; struct bioscallregs regs;
@ -104,11 +117,14 @@ bioscall(APM_SYSTEM_BIOS, \*[Am]regs);
.Sh REFERENCES .Sh REFERENCES
.Xr apm 4 .Xr apm 4
.Sh HISTORY .Sh HISTORY
.Nm The
first appeared in .Fn bioscall
function first appeared in
.Nx 1.3 . .Nx 1.3 .
.Sh BUGS .Sh BUGS
Not all BIOS functions are safe to call through the trampoline, as they Not all
.Tn BIOS
functions are safe to call through the trampoline, as they
may depend on system state which has been disturbed or used for other may depend on system state which has been disturbed or used for other
purposes once the purposes once the
.Nx .Nx