3 files changed, 168 insertions, 0 deletions
diff --git a/share/man/man9/Makefile b/share/man/man9/Makefile
index d757682..663466f 100644
--- a/share/man/man9/Makefile
+++ b/share/man/man9/Makefile
@@ -244,6 +244,7 @@ MAN=	accept_filter.9 \
 	sysctl.9 \
 	sysctl_add_oid.9 \
 	sysctl_ctx_init.9 \
+	SYSINIT.9 \
 	taskqueue.9 \
 	thread_exit.9 \
 	time.9 \
@@ -1211,6 +1212,7 @@ MLINKS+=sysctl_ctx_init.9 sysctl_ctx_entry_add.9 \
 	sysctl_ctx_init.9 sysctl_ctx_entry_del.9 \
 	sysctl_ctx_init.9 sysctl_ctx_entry_find.9 \
 	sysctl_ctx_init.9 sysctl_ctx_free.9
+MLINKS+=SYSINIT.9 SYSUNINIT.9
 MLINKS+=taskqueue.9 TASK_INIT.9 \
 	taskqueue.9 taskqueue_cancel.9 \
 	taskqueue.9 taskqueue_create.9 \
diff --git a/share/man/man9/SYSINIT.9 b/share/man/man9/SYSINIT.9
new file mode 100644
index 0000000..9140dd8
--- /dev/null
+++ b/share/man/man9/SYSINIT.9
@@ -0,0 +1,163 @@
+.\" Copyright (c) 2003 Hiten M. Pandya
+.\" 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd December 1, 2010
+.Dt SYSINIT 9
+.Os
+.Sh NAME
+.Nm SYSINIT ,
+.Nm SYSUNINIT 
+.Nd a framework for dynamic kernel initialization
+.Sh SYNOPSIS
+.In sys/param.h
+.In sys/kernel.h
+.Fn SYSINIT "uniquifier" "enum sysinit_sub_id subsystem" "enum sysinit_elem_order order" "sysinit_cfunc_t func" "const void *ident"
+.Fn SYSUNINIT "uniquifier" "enum sysinit_sub_id subsystem" "enum sysinit_elem_order order" "sysinit_cfunc_t func" "const void *ident"
+.Sh DESCRIPTION
+.Nm
+is a mechanism for scheduling the execution of initialization and teardown
+routines.
+This is similar to init and fini routines with the addition of explicit
+ordering metadata.
+It allows runtime ordering of subsystem initialization in the kernel as well
+as kernel modules (KLDs).
+.Pp
+The
+.Fn SYSINIT
+macro creates a
+.Vt struct sysinit
+and stores it in a startup linker set.
+The
+.Vt struct sysinit
+type as well as the subsystem identifier constants
+.Pq Dv SI_SUB_*
+and initialization ordering constants
+.Pq Dv SI_ORDER_*
+are defined in
+.In sys/kernel.h :
+.Bd -literal
+struct sysinit {
+	enum sysinit_sub_id subsystem;	/* subsystem identifier*/
+	enum sysinit_elem_order	order;	/* init order within subsystem*/
+	sysinit_cfunc_t func;		/* function             */
+	const void	*udata;		/* multiplexer/argument */
+};
+.Ed
+.Pp
+The
+.Fn SYSINIT
+macro takes a
+.Fa uniquifier
+argument to identify the particular function dispatch data,
+the
+.Fa subsystem
+type of startup interface, the subsystem element
+.Fa order
+of initialization within the subsystem, the
+.Fa func
+function to call,
+and the data specified in
+.Fa ident
+argument to pass the function.
+.Pp
+The
+.Fn SYSUNINIT
+macro behaves similarly to the
+.Fn SYSINIT
+macro except that it adds the data to a shutdown linker set.
+.Pp
+The startup linker set for the kernel is scanned during boot to build a
+sorted list of initialization routines.
+The initialization routines are then executed in the sorted order.
+The
+.Fa subsystem
+is used as the primary key and is sorted in ascending order.
+The
+.Fa order
+is used as the secondary key and is sorted in ascending order.
+The relative order of two routines that have the same
+.Fa subsystem
+and
+.Fa order
+is undefined.
+.Pp
+The startup linker sets for modules that are loaded together with the kernel
+by the boot loader are scanned during the
+.Dv SI_SUB_KLD
+subsystem initialization.
+These modules' initialization routines are sorted and merged into the kernel's
+list of startup routines and are executed during boot along with the kernel's
+initialization routines.
+Note that this has the effect that any initialization routines in a kernel
+module that are scheduled earlier than
+.Dv SI_SUB_KLD
+are not executed until after
+.Dv SI_SUB_KLD
+during boot.
+.Pp
+The startup linker set for a kernel module loaded at runtime via
+.Xr kldload 2
+is scanned, sorted, and executed when the module is loaded.
+.Pp
+The shutdown linker set for a kernel module is scanned, sorted, and executed
+when a kernel module is unloaded.
+The teardown routines are sorted in the reverse order of the initialization
+routines.
+The teardown routines of the kernel and any loaded modules are
+.Sy not
+executed during shutdown.
+.Sh EXAMPLES
+This example shows the SYSINIT which displays the copyright notice during boot:
+.Bd -literal -offset indent
+static void
+print_caddr_t(void *data)
+{
+	printf("%s", (char *)data);
+}
+SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t,
+    copyright);
+.Ed
+.Sh SEE ALSO
+.Xr kld 4 ,
+.Xr DECLARE_MODULE 9 ,
+.Xr DEV_MODULE 9 ,
+.Xr DRIVER_MODULE 9 ,
+.Xr MTX_SYSINIT 9 ,
+.Xr SYSCALL_MODULE 9
+.Sh HISTORY
+The
+.Nm
+framework first appeared in
+.Fx 2.2 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+framework was written by
+.An Terrence Lambert Aq terry@FreeBSD.org .
+.Pp
+This manual page was written by
+.An Hiten Pandya Aq hmp@FreeBSD.org .
diff --git a/share/man/man9/bus_space.9 b/share/man/man9/bus_space.9
index 5a18dfb..b3234c4 100644
--- a/share/man/man9/bus_space.9
+++ b/share/man/man9/bus_space.9
@@ -719,6 +719,9 @@ or which return data read from bus space (i.e., functions which
 do not obviously return an error code) do not fail.
 They could only fail
 if given invalid arguments, and in that case their behaviour is undefined.
+Functions which take a count of bytes have undefined results if the specified
+.Fa count
+is zero.
 .Sh TYPES
 Several types are defined in
 .In machine/bus.h