[PATCH RTEMS 2/7] libfreebsd: Import OFW files from FreeBSD.

Niteesh G. S. niteesh.gs at gmail.com
Thu Jul 30 12:09:41 UTC 2020


On Thu, Jul 30, 2020 at 1:11 AM Gedare Bloom <gedare at rtems.org> wrote:

> On Wed, Jul 29, 2020 at 12:56 PM Niteesh G. S. <niteesh.gs at gmail.com>
> wrote:
> >
> >
> > On Wed, Jul 29, 2020 at 9:24 PM Gedare Bloom <gedare at rtems.org> wrote:
> >>
> >> I'm a little concerned about namespace pollution.
> >
> >
> > Can you please explain about namespace pollution?
> >
>
> I alluded to this elsewhere. The global symbols (global vars,
> functions) and anything defined in a header (structs, typedefs) that
> gets included by applications (end users) will be in the same
> namespace as the application code. This means that the user may get a
> surprise because of a name collision.
>

Thank you.

>
> >
> >>
> >> On Wed, Jul 15, 2020 at 12:32 AM G S Niteesh Babu <niteesh.gs at gmail.com>
> wrote:
> >> >
> >> > freebsd head: b8c57b4
> >> >
> >> > The following files have been imported from FreeBSD to implement
> >> > OF_* functions into RTEMS.
> >> > 1) openfirm.h
> >> > 2) openfirm.c
> >> > 3) ofw_fdt.c
> >> > ---
> >> >  cpukit/include/dev/ofw/openfirm.h            | 187 ++++
> >> >  cpukit/libfreebsd/freebsd/dev/ofw/ofw_fdt.c  | 479 +++++++++++
> >> >  cpukit/libfreebsd/freebsd/dev/ofw/openfirm.c | 848
> +++++++++++++++++++
> >> >  3 files changed, 1514 insertions(+)
> >> >  create mode 100644 cpukit/include/dev/ofw/openfirm.h
> >> >  create mode 100644 cpukit/libfreebsd/freebsd/dev/ofw/ofw_fdt.c
> >> >  create mode 100644 cpukit/libfreebsd/freebsd/dev/ofw/openfirm.c
> >> >
> >> > diff --git a/cpukit/include/dev/ofw/openfirm.h
> b/cpukit/include/dev/ofw/openfirm.h
> >> > new file mode 100644
> >> > index 0000000000..74a7075367
> >> > --- /dev/null
> >> > +++ b/cpukit/include/dev/ofw/openfirm.h
> >> > @@ -0,0 +1,187 @@
> >> > +/*     $NetBSD: openfirm.h,v 1.1 1998/05/15 10:16:00 tsubai Exp $
>   */
> >> > +
> >> > +/*-
> >> > + * SPDX-License-Identifier: (BSD-4-Clause AND BSD-2-Clause-FreeBSD)
> >> > + *
> >> > + * Copyright (C) 1995, 1996 Wolfgang Solfrank.
> >> > + * Copyright (C) 1995, 1996 TooLs GmbH.
> >> > + * 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.
> >> > + * 3. All advertising materials mentioning features or use of this
> software
> >> > + *    must display the following acknowledgement:
> >> > + *     This product includes software developed by TooLs GmbH.
> This is not good. See if they released this clause, otherwise we can't
> use this code. Sorry I didn't notice the license issue before.
>

OK. This is bad news. But how can I check if they had released the clause?



> >> > + * 4. The name of TooLs GmbH may not be used to endorse or promote
> products
> >> > + *    derived from this software without specific prior written
> permission.
> I always liked the contradictory nature of #3 and #4.
>
> >> > + *
> >> > + * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
> >> > + */
> >> > +/*
> >> > + * Copyright (C) 2000 Benno Rice.
> >> > + * 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 Benno Rice ``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 TOOLS GMBH 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.
> >> > + *
> >> > + * $FreeBSD$
> >> > + */
> >> > +
> >> > +#ifndef _DEV_OPENFIRM_H_
> >> > +#define _DEV_OPENFIRM_H_
> >> > +
> >> > +#include <sys/types.h>
> >> > +#include <machine/_bus.h>
> >> > +
> >> > +/*
> >> > + * Prototypes for Open Firmware Interface Routines
> >> > + */
> >> > +
> >> > +typedef uint32_t       ihandle_t;
> >> > +typedef uint32_t       phandle_t;
> >> > +typedef uint32_t       pcell_t;
> >> > +
> >> > +#ifdef _KERNEL
> >> > +#include <sys/malloc.h>
> >> > +
> >> > +#include <machine/ofw_machdep.h>
> >> > +
> >> > +MALLOC_DECLARE(M_OFWPROP);
> >> > +
> >> > +/*
> >> > + * Open Firmware interface initialization.  OF_install installs the
> named
> >> > + * interface as the Open Firmware access mechanism, OF_init
> initializes it.
> >> > + */
> >> > +
> >> > +boolean_t      OF_install(char *name, int prio);
> >> > +int            OF_init(void *cookie);
> >> > +
> >> > +/*
> >> > + * Known Open Firmware interface names
> >> > + */
> >> > +
> >> > +#define        OFW_STD_DIRECT  "ofw_std"       /* Standard OF
> interface */
> >> > +#define        OFW_STD_REAL    "ofw_real"      /* Real-mode OF
> interface */
> >> > +#define        OFW_STD_32BIT   "ofw_32bit"     /* 32-bit OF
> interface */
> >> > +#define        OFW_FDT         "ofw_fdt"       /* Flattened Device
> Tree */
> >> > +
> >> > +/* Generic functions */
> >> > +int            OF_test(const char *name);
> >> > +void           OF_printf(const char *fmt, ...);
> >> > +
> >> > +/* Device tree functions */
> >> > +phandle_t      OF_peer(phandle_t node);
> >> > +phandle_t      OF_child(phandle_t node);
> >> > +phandle_t      OF_parent(phandle_t node);
> >> > +ssize_t                OF_getproplen(phandle_t node, const char
> *propname);
> >> > +ssize_t                OF_getprop(phandle_t node, const char
> *propname, void *buf,
> >> > +                   size_t len);
> >> > +ssize_t                OF_getencprop(phandle_t node, const char
> *prop, pcell_t *buf,
> >> > +                   size_t len); /* Same as getprop, but maintains
> endianness */
> >> > +int            OF_hasprop(phandle_t node, const char *propname);
> >> > +ssize_t                OF_searchprop(phandle_t node, const char
> *propname, void *buf,
> >> > +                   size_t len);
> >> > +ssize_t                OF_searchencprop(phandle_t node, const char
> *propname,
> >> > +                   pcell_t *buf, size_t len);
> >> > +ssize_t                OF_getprop_alloc(phandle_t node, const char
> *propname,
> >> > +                   void **buf);
> >> > +ssize_t                OF_getprop_alloc_multi(phandle_t node, const
> char *propname,
> >> > +                   int elsz, void **buf);
> >> > +ssize_t                OF_getencprop_alloc(phandle_t node, const
> char *propname,
> >> > +                   void **buf);
> >> > +ssize_t                OF_getencprop_alloc_multi(phandle_t node,
> const char *propname,
> >> > +                   int elsz, void **buf);
> >> > +void           OF_prop_free(void *buf);
> >> > +int            OF_nextprop(phandle_t node, const char *propname,
> char *buf,
> >> > +                   size_t len);
> >> > +int            OF_setprop(phandle_t node, const char *name, const
> void *buf,
> >> > +                   size_t len);
> >> > +ssize_t                OF_canon(const char *path, char *buf, size_t
> len);
> >> > +phandle_t      OF_finddevice(const char *path);
> >> > +ssize_t                OF_package_to_path(phandle_t node, char *buf,
> size_t len);
> >> > +
> >> > +/*
> >> > + * Some OF implementations (IBM, FDT) have a concept of effective
> phandles
> >> > + * used for device-tree cross-references. Given one of these,
> returns the
> >> > + * real phandle. If one can't be found (or running on OF
> implementations
> >> > + * without this property), returns its input.
> >> > + */
> >> > +phandle_t      OF_node_from_xref(phandle_t xref);
> >> > +phandle_t      OF_xref_from_node(phandle_t node);
> >> > +
> >> > +/*
> >> > + * When properties contain references to other nodes using xref
> handles it is
> >> > + * often necessary to use interfaces provided by the driver for the
> referenced
> >> > + * instance.  These routines allow a driver that provides such an
> interface to
> >> > + * register its association with an xref handle, and for other
> drivers to obtain
> >> > + * the device_t associated with an xref handle.
> >> > + */
> >> > +device_t       OF_device_from_xref(phandle_t xref);
> >> > +phandle_t      OF_xref_from_device(device_t dev);
> >> > +int            OF_device_register_xref(phandle_t xref, device_t dev);
> >> > +
> >> > +/* Device I/O functions */
> >> > +ihandle_t      OF_open(const char *path);
> >> > +void           OF_close(ihandle_t instance);
> >> > +ssize_t                OF_read(ihandle_t instance, void *buf, size_t
> len);
> >> > +ssize_t                OF_write(ihandle_t instance, const void *buf,
> size_t len);
> >> > +int            OF_seek(ihandle_t instance, uint64_t where);
> >> > +
> >> > +phandle_t      OF_instance_to_package(ihandle_t instance);
> >> > +ssize_t                OF_instance_to_path(ihandle_t instance, char
> *buf, size_t len);
> >> > +int            OF_call_method(const char *method, ihandle_t instance,
> >> > +                   int nargs, int nreturns, ...);
> >> > +
> >> > +/* Memory functions */
> >> > +void           *OF_claim(void *virtrequest, size_t size, u_int
> align);
> >> > +void           OF_release(void *virt, size_t size);
> >> > +
> >> > +/* Control transfer functions */
> >> > +void           OF_enter(void);
> >> > +void           OF_exit(void) __attribute__((noreturn));
> >> > +
> >> > +/* User interface functions */
> >> > +int            OF_interpret(const char *cmd, int nreturns, ...);
> >> > +
> >> > +/*
> >> > + * Decode the Nth register property of the given device node and
> create a bus
> >> > + * space tag and handle for accessing it.  This is for use in
> setting up things
> >> > + * like early console output before newbus is available.
> >> > + */
> >> > +int            OF_decode_addr(phandle_t dev, int regno,
> bus_space_tag_t *ptag,
> >> > +                   bus_space_handle_t *phandle, bus_size_t *sz);
> >> > +
> >> > +#endif /* _KERNEL */
> >> > +#endif /* _DEV_OPENFIRM_H_ */
> >> > \ No newline at end of file
> >> > diff --git a/cpukit/libfreebsd/freebsd/dev/ofw/ofw_fdt.c
> b/cpukit/libfreebsd/freebsd/dev/ofw/ofw_fdt.c
> >> > new file mode 100644
> >> > index 0000000000..e4f72e8142
> >> > --- /dev/null
> >> > +++ b/cpukit/libfreebsd/freebsd/dev/ofw/ofw_fdt.c
> >> > @@ -0,0 +1,479 @@
> >> > +/*-
> >> > + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
> >> > + *
> >> > + * Copyright (c) 2009-2010 The FreeBSD Foundation
> >> > + * All rights reserved.
> >> > + *
> >> > + * This software was developed by Semihalf under sponsorship from
> >> > + * the FreeBSD Foundation.
> >> > + *
> >> > + * 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.
> >> > + */
> >> > +
> >> > +#include <sys/cdefs.h>
> >> > +__FBSDID("$FreeBSD$");
> >> > +
> >> > +#include <sys/param.h>
> >> > +#include <sys/kernel.h>
> >> > +#include <sys/malloc.h>
> >> > +#include <sys/systm.h>
> >> > +
> >> > +#include <contrib/libfdt/libfdt.h>
> >> > +
> >> > +#include <machine/stdarg.h>
> >> > +
> >> > +#include <dev/fdt/fdt_common.h>
> >> > +#include <dev/ofw/ofwvar.h>
> >> > +#include <dev/ofw/openfirm.h>
> >> > +#include <dev/ofw/ofw_bus_subr.h>
> >> > +
> >> > +#include "ofw_if.h"
> >> > +
> >> > +#ifdef DEBUG
> >> > +#define debugf(fmt, args...) do { printf("%s(): ", __func__);  \
> >> > +    printf(fmt,##args); } while (0)
> >> > +#else
> >> > +#define debugf(fmt, args...)
> >> > +#endif
> >> > +
> >> > +#if defined(__arm__)
> >> > +#if defined(SOC_MV_ARMADAXP) || defined(SOC_MV_ARMADA38X) || \
> >> > +    defined(SOC_MV_DISCOVERY) || defined(SOC_MV_DOVE) || \
> >> > +    defined(SOC_MV_FREY) || defined(SOC_MV_KIRKWOOD) || \
> >> > +    defined(SOC_MV_LOKIPLUS) || defined(SOC_MV_ORION)
> >> > +#define FDT_MARVELL
> >> > +#endif
> >> > +#endif
> >> > +
> >> > +static int ofw_fdt_init(ofw_t, void *);
> >> > +static phandle_t ofw_fdt_peer(ofw_t, phandle_t);
> >> > +static phandle_t ofw_fdt_child(ofw_t, phandle_t);
> >> > +static phandle_t ofw_fdt_parent(ofw_t, phandle_t);
> >> > +static phandle_t ofw_fdt_instance_to_package(ofw_t, ihandle_t);
> >> > +static ssize_t ofw_fdt_getproplen(ofw_t, phandle_t, const char *);
> >> > +static ssize_t ofw_fdt_getprop(ofw_t, phandle_t, const char *, void
> *, size_t);
> >> > +static int ofw_fdt_nextprop(ofw_t, phandle_t, const char *, char *,
> size_t);
> >> > +static int ofw_fdt_setprop(ofw_t, phandle_t, const char *, const
> void *,
> >> > +    size_t);
> >> > +static ssize_t ofw_fdt_canon(ofw_t, const char *, char *, size_t);
> >> > +static phandle_t ofw_fdt_finddevice(ofw_t, const char *);
> >> > +static ssize_t ofw_fdt_instance_to_path(ofw_t, ihandle_t, char *,
> size_t);
> >> > +static ssize_t ofw_fdt_package_to_path(ofw_t, phandle_t, char *,
> size_t);
> >> > +static int ofw_fdt_interpret(ofw_t, const char *, int, cell_t *);
> >> > +
> >> > +static ofw_method_t ofw_fdt_methods[] = {
> >> > +       OFWMETHOD(ofw_init,                     ofw_fdt_init),
> >> > +       OFWMETHOD(ofw_peer,                     ofw_fdt_peer),
> >> > +       OFWMETHOD(ofw_child,                    ofw_fdt_child),
> >> > +       OFWMETHOD(ofw_parent,                   ofw_fdt_parent),
> >> > +       OFWMETHOD(ofw_instance_to_package,
> ofw_fdt_instance_to_package),
> >> > +       OFWMETHOD(ofw_getproplen,               ofw_fdt_getproplen),
> >> > +       OFWMETHOD(ofw_getprop,                  ofw_fdt_getprop),
> >> > +       OFWMETHOD(ofw_nextprop,                 ofw_fdt_nextprop),
> >> > +       OFWMETHOD(ofw_setprop,                  ofw_fdt_setprop),
> >> > +       OFWMETHOD(ofw_canon,                    ofw_fdt_canon),
> >> > +       OFWMETHOD(ofw_finddevice,               ofw_fdt_finddevice),
> >> > +       OFWMETHOD(ofw_instance_to_path,
>  ofw_fdt_instance_to_path),
> >> > +       OFWMETHOD(ofw_package_to_path,
> ofw_fdt_package_to_path),
> >> > +       OFWMETHOD(ofw_interpret,                ofw_fdt_interpret),
> >> > +       { 0, 0 }
> >> > +};
> >> > +
> >> > +static ofw_def_t ofw_fdt = {
> >> > +       OFW_FDT,
> >> > +       ofw_fdt_methods,
> >> > +       0
> >> > +};
> >> > +OFW_DEF(ofw_fdt);
> >> > +
> >> > +static void *fdtp = NULL;
> >> > +
> >> > +static int
> >> > +sysctl_handle_dtb(SYSCTL_HANDLER_ARGS)
> >> > +{
> >> > +
> >> > +        return (sysctl_handle_opaque(oidp, fdtp,
> fdt_totalsize(fdtp), req));
> >> > +}
> >> > +
> >> > +static void
> >> > +sysctl_register_fdt_oid(void *arg)
> >> > +{
> >> > +
> >> > +       /* If there is no FDT registered, skip adding the sysctl */
> >> > +       if (fdtp == NULL)
> >> > +               return;
> >> > +
> >> > +       SYSCTL_ADD_PROC(NULL, SYSCTL_STATIC_CHILDREN(_hw_fdt),
> OID_AUTO, "dtb",
> >> > +           CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
> >> > +           sysctl_handle_dtb, "", "Device Tree Blob");
> >> > +}
> >> > +SYSINIT(dtb_oid, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_register_fdt_oid,
> NULL);
> >> > +
> >> > +static int
> >> > +ofw_fdt_init(ofw_t ofw, void *data)
> >> > +{
> >> > +       int err;
> >> > +
> >> > +       /* Check FDT blob integrity */
> >> > +       if ((err = fdt_check_header(data)) != 0)
> >> > +               return (err);
> >> > +
> >> > +       fdtp = data;
> >> > +       return (0);
> >> > +}
> >> > +
> >> > +/*
> >> > + * Device tree functions.
> >> > + *
> >> > + * We use the offset from fdtp to the node as the 'phandle' in OF
> interface.
> >> > + *
> >> > + * phandle is a u32 value, therefore we cannot use the pointer to
> node as
> >> > + * phandle in 64 bit. We also do not use the usual fdt offset as
> phandle,
> >> > + * as it can be 0, and the OF interface has special meaning for
> phandle 0.
> >> > + */
> >> > +
> >> > +static phandle_t
> >> > +fdt_offset_phandle(int offset)
> >> > +{
> >> > +       if (offset < 0)
> >> > +               return (0);
> >> > +       return ((phandle_t)offset + fdt_off_dt_struct(fdtp));
> >> > +}
> >> > +
> >> > +static int
> >> > +fdt_phandle_offset(phandle_t p)
> >> > +{
> >> > +       int pint = (int)p;
> >> > +       int dtoff = fdt_off_dt_struct(fdtp);
> >> > +
> >> > +       if (pint < dtoff)
> >> > +               return (-1);
> >> > +       return (pint - dtoff);
> >> > +}
> >> > +
> >> > +/* Return the next sibling of this node or 0. */
> >> > +static phandle_t
> >> > +ofw_fdt_peer(ofw_t ofw, phandle_t node)
> >> > +{
> >> > +       int offset;
> >> > +
> >> > +       if (node == 0) {
> >> > +               /* Find root node */
> >> > +               offset = fdt_path_offset(fdtp, "/");
> >> > +
> >> > +               return (fdt_offset_phandle(offset));
> >> > +       }
> >> > +
> >> > +       offset = fdt_phandle_offset(node);
> >> > +       if (offset < 0)
> >> > +               return (0);
> >> > +       offset = fdt_next_subnode(fdtp, offset);
> >> > +       return (fdt_offset_phandle(offset));
> >> > +}
> >> > +
> >> > +/* Return the first child of this node or 0. */
> >> > +static phandle_t
> >> > +ofw_fdt_child(ofw_t ofw, phandle_t node)
> >> > +{
> >> > +       int offset;
> >> > +
> >> > +       offset = fdt_phandle_offset(node);
> >> > +       if (offset < 0)
> >> > +               return (0);
> >> > +       offset = fdt_first_subnode(fdtp, offset);
> >> > +       return (fdt_offset_phandle(offset));
> >> > +}
> >> > +
> >> > +/* Return the parent of this node or 0. */
> >> > +static phandle_t
> >> > +ofw_fdt_parent(ofw_t ofw, phandle_t node)
> >> > +{
> >> > +       int offset, paroffset;
> >> > +
> >> > +       offset = fdt_phandle_offset(node);
> >> > +       if (offset < 0)
> >> > +               return (0);
> >> > +
> >> > +       paroffset = fdt_parent_offset(fdtp, offset);
> >> > +       return (fdt_offset_phandle(paroffset));
> >> > +}
> >> > +
> >> > +/* Return the package handle that corresponds to an instance handle.
> */
> >> > +static phandle_t
> >> > +ofw_fdt_instance_to_package(ofw_t ofw, ihandle_t instance)
> >> > +{
> >> > +
> >> > +       /* Where real OF uses ihandles in the tree, FDT uses xref
> phandles */
> >> > +       return (OF_node_from_xref(instance));
> >> > +}
> >> > +
> >> > +/* Get the length of a property of a package. */
> >> > +static ssize_t
> >> > +ofw_fdt_getproplen(ofw_t ofw, phandle_t package, const char
> *propname)
> >> > +{
> >> > +       const void *prop;
> >> > +       int offset, len;
> >> > +
> >> > +       offset = fdt_phandle_offset(package);
> >> > +       if (offset < 0)
> >> > +               return (-1);
> >> > +
> >> > +       len = -1;
> >> > +       prop = fdt_getprop(fdtp, offset, propname, &len);
> >> > +
> >> > +       if (prop == NULL && strcmp(propname, "name") == 0) {
> >> > +               /* Emulate the 'name' property */
> >> > +               fdt_get_name(fdtp, offset, &len);
> >> > +               return (len + 1);
> >> > +       }
> >> > +
> >> > +       if (prop == NULL && offset == fdt_path_offset(fdtp,
> "/chosen")) {
> >> > +               if (strcmp(propname, "fdtbootcpu") == 0)
> >> > +                       return (sizeof(cell_t));
> >> > +               if (strcmp(propname, "fdtmemreserv") == 0)
> >> > +                       return
> (sizeof(uint64_t)*2*fdt_num_mem_rsv(fdtp));
> >> > +       }
> >> > +
> >> > +       if (prop == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (len);
> >> > +}
> >> > +
> >> > +/* Get the value of a property of a package. */
> >> > +static ssize_t
> >> > +ofw_fdt_getprop(ofw_t ofw, phandle_t package, const char *propname,
> void *buf,
> >> > +    size_t buflen)
> >> > +{
> >> > +       const void *prop;
> >> > +       const char *name;
> >> > +       int len, offset;
> >> > +       uint32_t cpuid;
> >> > +
> >> > +       offset = fdt_phandle_offset(package);
> >> > +       if (offset < 0)
> >> > +               return (-1);
> >> > +
> >> > +       prop = fdt_getprop(fdtp, offset, propname, &len);
> >> > +
> >> > +       if (prop == NULL && strcmp(propname, "name") == 0) {
> >> > +               /* Emulate the 'name' property */
> >> > +               name = fdt_get_name(fdtp, offset, &len);
> >> > +               strncpy(buf, name, buflen);
> >> > +               return (len + 1);
> >> > +       }
> >> > +
> >> > +       if (prop == NULL && offset == fdt_path_offset(fdtp,
> "/chosen")) {
> >> > +               if (strcmp(propname, "fdtbootcpu") == 0) {
> >> > +                       cpuid =
> cpu_to_fdt32(fdt_boot_cpuid_phys(fdtp));
> >> > +                       len = sizeof(cpuid);
> >> > +                       prop = &cpuid;
> >> > +               }
> >> > +               if (strcmp(propname, "fdtmemreserv") == 0) {
> >> > +                       prop = (char *)fdtp +
> fdt_off_mem_rsvmap(fdtp);
> >> > +                       len =
> sizeof(uint64_t)*2*fdt_num_mem_rsv(fdtp);
> >> > +               }
> >> > +       }
> >> > +
> >> > +       if (prop == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       bcopy(prop, buf, min(len, buflen));
> >> > +
> >> > +       return (len);
> >> > +}
> >> > +
> >> > +/*
> >> > + * Get the next property of a package. Return values:
> >> > + *  -1: package or previous property does not exist
> >> > + *   0: no more properties
> >> > + *   1: success
> >> > + */
> >> > +static int
> >> > +ofw_fdt_nextprop(ofw_t ofw, phandle_t package, const char *previous,
> char *buf,
> >> > +    size_t size)
> >> > +{
> >> > +       const void *prop;
> >> > +       const char *name;
> >> > +       int offset;
> >> > +
> >> > +       offset = fdt_phandle_offset(package);
> >> > +       if (offset < 0)
> >> > +               return (-1);
> >> > +
> >> > +       if (previous == NULL)
> >> > +               /* Find the first prop in the node */
> >> > +               offset = fdt_first_property_offset(fdtp, offset);
> >> > +       else {
> >> > +               fdt_for_each_property_offset(offset, fdtp, offset) {
> >> > +                       prop = fdt_getprop_by_offset(fdtp, offset,
> &name, NULL);
> >> > +                       if (prop == NULL)
> >> > +                               return (-1); /* Internal error */
> >> > +                       /* Skip until we find 'previous', then bail
> out */
> >> > +                       if (strcmp(name, previous) != 0)
> >> > +                               continue;
> >> > +                       offset = fdt_next_property_offset(fdtp,
> offset);
> >> > +                       break;
> >> > +               }
> >> > +       }
> >> > +
> >> > +       if (offset < 0)
> >> > +               return (0); /* No properties */
> >> > +
> >> > +       prop = fdt_getprop_by_offset(fdtp, offset, &name, &offset);
> >> > +       if (prop == NULL)
> >> > +               return (-1); /* Internal error */
> >> > +
> >> > +       strncpy(buf, name, size);
> >> > +
> >> > +       return (1);
> >> > +}
> >> > +
> >> > +/* Set the value of a property of a package. */
> >> > +static int
> >> > +ofw_fdt_setprop(ofw_t ofw, phandle_t package, const char *propname,
> >> > +    const void *buf, size_t len)
> >> > +{
> >> > +       int offset;
> >> > +
> >> > +       offset = fdt_phandle_offset(package);
> >> > +       if (offset < 0)
> >> > +               return (-1);
> >> > +
> >> > +       if (fdt_setprop_inplace(fdtp, offset, propname, buf, len) !=
> 0)
> >> > +               /* Try to add property, when setting value inplace
> failed */
> >> > +               return (fdt_setprop(fdtp, offset, propname, buf,
> len));
> >> > +
> >> > +       return (0);
> >> > +}
> >> > +
> >> > +/* Convert a device specifier to a fully qualified pathname. */
> >> > +static ssize_t
> >> > +ofw_fdt_canon(ofw_t ofw, const char *device, char *buf, size_t len)
> >> > +{
> >> > +
> >> > +       return (-1);
> >> > +}
> >> > +
> >> > +/* Return a package handle for the specified device. */
> >> > +static phandle_t
> >> > +ofw_fdt_finddevice(ofw_t ofw, const char *device)
> >> > +{
> >> > +       int offset;
> >> > +
> >> > +       offset = fdt_path_offset(fdtp, device);
> >> > +       if (offset < 0)
> >> > +               return (-1);
> >> > +       return (fdt_offset_phandle(offset));
> >> > +}
> >> > +
> >> > +/* Return the fully qualified pathname corresponding to an instance.
> */
> >> > +static ssize_t
> >> > +ofw_fdt_instance_to_path(ofw_t ofw, ihandle_t instance, char *buf,
> size_t len)
> >> > +{
> >> > +       phandle_t phandle;
> >> > +
> >> > +       phandle = OF_instance_to_package(instance);
> >> > +       if (phandle == -1)
> >> > +               return (-1);
> >> > +
> >> > +       return (OF_package_to_path(phandle, buf, len));
> >> > +}
> >> > +
> >> > +/* Return the fully qualified pathname corresponding to a package. */
> >> > +static ssize_t
> >> > +ofw_fdt_package_to_path(ofw_t ofw, phandle_t package, char *buf,
> size_t len)
> >> > +{
> >> > +
> >> > +       return (-1);
> >> > +}
> >> > +
> >> > +#if defined(FDT_MARVELL)
> >> > +static int
> >> > +ofw_fdt_fixup(ofw_t ofw)
> >> > +{
> >> > +#define FDT_MODEL_LEN  80
> >> > +       char model[FDT_MODEL_LEN];
> >> > +       phandle_t root;
> >> > +       ssize_t len;
> >> > +       int i;
> >> > +
> >> > +       if ((root = ofw_fdt_finddevice(ofw, "/")) == -1)
> >> > +               return (ENODEV);
> >> > +
> >> > +       if ((len = ofw_fdt_getproplen(ofw, root, "model")) <= 0)
> >> > +               return (0);
> >> > +
> >> > +       bzero(model, FDT_MODEL_LEN);
> >> > +       if (ofw_fdt_getprop(ofw, root, "model", model, FDT_MODEL_LEN)
> <= 0)
> >> > +               return (0);
> >> > +
> >> > +       /*
> >> > +        * Search fixup table and call handler if appropriate.
> >> > +        */
> >> > +       for (i = 0; fdt_fixup_table[i].model != NULL; i++) {
> >> > +               if (strncmp(model, fdt_fixup_table[i].model,
> >> > +                   FDT_MODEL_LEN) != 0)
> >> > +                       /*
> >> > +                        * Sometimes it's convenient to provide one
> >> > +                        * fixup entry that refers to many boards.
> >> > +                        * To handle this case, simply check if model
> >> > +                        * is compatible parameter
> >> > +                        */
> >> > +                       if(!ofw_bus_node_is_compatible(root,
> >> > +                           fdt_fixup_table[i].model))
> >> > +                               continue;
> >> > +
> >> > +               if (fdt_fixup_table[i].handler != NULL)
> >> > +                       (*fdt_fixup_table[i].handler)(root);
> >> > +       }
> >> > +
> >> > +       return (0);
> >> > +}
> >> > +#endif
> >> > +
> >> > +static int
> >> > +ofw_fdt_interpret(ofw_t ofw, const char *cmd, int nret, cell_t
> *retvals)
> >> > +{
> >> > +#if defined(FDT_MARVELL)
> >> > +       int rv;
> >> > +
> >> > +       /*
> >> > +        * Note: FDT does not have the possibility to 'interpret'
> commands,
> >> > +        * but we abuse the interface a bit to use it for doing
> non-standard
> >> > +        * operations on the device tree blob.
> >> > +        *
> >> > +        * Currently the only supported 'command' is to trigger
> performing
> >> > +        * fixups.
> >> > +        */
> >> > +       if (strncmp("perform-fixup", cmd, 13) != 0)
> >> > +               return (0);
> >> > +
> >> > +       rv = ofw_fdt_fixup(ofw);
> >> > +       if (nret > 0)
> >> > +               retvals[0] = rv;
> >> > +
> >> > +       return (rv);
> >> > +#else
> >> > +       return (0);
> >> > +#endif
> >> > +}
> >> > \ No newline at end of file
> >> > diff --git a/cpukit/libfreebsd/freebsd/dev/ofw/openfirm.c
> b/cpukit/libfreebsd/freebsd/dev/ofw/openfirm.c
> >> > new file mode 100644
> >> > index 0000000000..50ebf2cf16
> >> > --- /dev/null
> >> > +++ b/cpukit/libfreebsd/freebsd/dev/ofw/openfirm.c
> >> > @@ -0,0 +1,848 @@
> >> > +/*     $NetBSD: Locore.c,v 1.7 2000/08/20 07:04:59 tsubai Exp $
>   */
> >> > +
> >> > +/*-
> >> > + * SPDX-License-Identifier: BSD-4-Clause
> >> > + *
> >> > + * Copyright (C) 1995, 1996 Wolfgang Solfrank.
> >> > + * Copyright (C) 1995, 1996 TooLs GmbH.
> >> > + * 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.
> >> > + * 3. All advertising materials mentioning features or use of this
> software
> >> > + *    must display the following acknowledgement:
> >> > + *     This product includes software developed by TooLs GmbH.
> >> > + * 4. The name of TooLs GmbH may not be used to endorse or promote
> products
> >> > + *    derived from this software without specific prior written
> permission.
> >> > + *
> >> > + * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
> >> > + */
> >> > +/*-
> >> > + * Copyright (C) 2000 Benno Rice.
> >> > + * 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 Benno Rice ``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 TOOLS GMBH 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.
> >> > + */
> >> > +
> >> > +#include <sys/cdefs.h>
> >> > +__FBSDID("$FreeBSD$");
> >> > +
> >> > +#include "opt_platform.h"
> >> > +
> >> > +#include <sys/param.h>
> >> > +#include <sys/kernel.h>
> >> > +#include <sys/lock.h>
> >> > +#include <sys/malloc.h>
> >> > +#include <sys/mutex.h>
> >> > +#include <sys/queue.h>
> >> > +#include <sys/systm.h>
> >> > +#include <sys/endian.h>
> >> > +
> >> > +#include <machine/stdarg.h>
> >> > +
> >> > +#include <dev/ofw/ofwvar.h>
> >> > +#include <dev/ofw/openfirm.h>
> >> > +
> >> > +#include "ofw_if.h"
> >> > +
> >> > +static void OF_putchar(int c, void *arg);
> >> > +
> >> > +MALLOC_DEFINE(M_OFWPROP, "openfirm", "Open Firmware properties");
> >> > +
> >> > +static ihandle_t stdout;
> >> > +
> >> > +static ofw_def_t       *ofw_def_impl = NULL;
> >> > +static ofw_t           ofw_obj;
> >> > +static struct ofw_kobj ofw_kernel_obj;
> >> > +static struct kobj_ops ofw_kernel_kops;
> >> > +
> >> > +struct xrefinfo {
> >> > +       phandle_t       xref;
> >> > +       phandle_t       node;
> >> > +       device_t        dev;
> >> > +       SLIST_ENTRY(xrefinfo) next_entry;
> >> > +};
> >> > +
> >> > +static SLIST_HEAD(, xrefinfo) xreflist =
> SLIST_HEAD_INITIALIZER(xreflist);
> >> > +static struct mtx xreflist_lock;
> >> > +static boolean_t xref_init_done;
> >> > +
> >> > +#define        FIND_BY_XREF    0
> >> > +#define        FIND_BY_NODE    1
> >> > +#define        FIND_BY_DEV     2
> >> > +
> >> > +/*
> >> > + * xref-phandle-device lookup helper routines.
> >> > + *
> >> > + * As soon as we are able to use malloc(), walk the node tree and
> build a list
> >> > + * of info that cross-references node handles, xref handles, and
> device_t
> >> > + * instances.  This list exists primarily to allow association of a
> device_t
> >> > + * with an xref handle, but it is also used to speed up translation
> between xref
> >> > + * and node handles.  Before malloc() is available we have to
> recursively search
> >> > + * the node tree each time we want to translate between a node and
> xref handle.
> >> > + * Afterwards we can do the translations by searching this much
> shorter list.
> >> > + */
> >> > +static void
> >> > +xrefinfo_create(phandle_t node)
> >> > +{
> >> > +       struct xrefinfo * xi;
> >> > +       phandle_t child, xref;
> >> > +
> >> > +       /*
> >> > +        * Recursively descend from parent, looking for nodes with a
> property
> >> > +        * named either "phandle", "ibm,phandle", or
> "linux,phandle".  For each
> >> > +        * such node found create an entry in the xreflist.
> >> > +        */
> >> > +       for (child = OF_child(node); child != 0; child =
> OF_peer(child)) {
> >> > +               xrefinfo_create(child);
> >> > +               if (OF_getencprop(child, "phandle", &xref,
> sizeof(xref)) ==
> >> > +                   -1 && OF_getencprop(child, "ibm,phandle", &xref,
> >> > +                   sizeof(xref)) == -1 && OF_getencprop(child,
> >> > +                   "linux,phandle", &xref, sizeof(xref)) == -1)
> >> > +                       continue;
> >> > +               xi = malloc(sizeof(*xi), M_OFWPROP, M_WAITOK |
> M_ZERO);
> >> > +               xi->node = child;
> >> > +               xi->xref = xref;
> >> > +               SLIST_INSERT_HEAD(&xreflist, xi, next_entry);
> >> > +       }
> >> > +}
> >> > +
> >> > +static void
> >> > +xrefinfo_init(void *unsed)
> >> > +{
> >> > +
> >> > +       /*
> >> > +        * There is no locking during this init because it runs much
> earlier
> >> > +        * than any of the clients/consumers of the xref list data,
> but we do
> >> > +        * initialize the mutex that will be used for access later.
> >> > +        */
> >> > +       mtx_init(&xreflist_lock, "OF xreflist lock", NULL, MTX_DEF);
> >> > +       xrefinfo_create(OF_peer(0));
> >> > +       xref_init_done = true;
> >> > +}
> >> > +SYSINIT(xrefinfo, SI_SUB_KMEM, SI_ORDER_ANY, xrefinfo_init, NULL);
> >> > +
> >> > +static struct xrefinfo *
> >> > +xrefinfo_find(uintptr_t key, int find_by)
> >> > +{
> >> > +       struct xrefinfo *rv, *xi;
> >> > +
> >> > +       rv = NULL;
> >> > +       mtx_lock(&xreflist_lock);
> >> > +       SLIST_FOREACH(xi, &xreflist, next_entry) {
> >> > +               if ((find_by == FIND_BY_XREF && (phandle_t)key ==
> xi->xref) ||
> >> > +                   (find_by == FIND_BY_NODE && (phandle_t)key ==
> xi->node) ||
> >> > +                   (find_by == FIND_BY_DEV && key ==
> (uintptr_t)xi->dev)) {
> >> > +                       rv = xi;
> >> > +                       break;
> >> > +               }
> >> > +       }
> >> > +       mtx_unlock(&xreflist_lock);
> >> > +       return (rv);
> >> > +}
> >> > +
> >> > +static struct xrefinfo *
> >> > +xrefinfo_add(phandle_t node, phandle_t xref, device_t dev)
> >> > +{
> >> > +       struct xrefinfo *xi;
> >> > +
> >> > +       xi = malloc(sizeof(*xi), M_OFWPROP, M_WAITOK);
> >> > +       xi->node = node;
> >> > +       xi->xref = xref;
> >> > +       xi->dev  = dev;
> >> > +       mtx_lock(&xreflist_lock);
> >> > +       SLIST_INSERT_HEAD(&xreflist, xi, next_entry);
> >> > +       mtx_unlock(&xreflist_lock);
> >> > +       return (xi);
> >> > +}
> >> > +
> >> > +/*
> >> > + * OFW install routines.  Highest priority wins, equal priority also
> >> > + * overrides allowing last-set to win.
> >> > + */
> >> > +SET_DECLARE(ofw_set, ofw_def_t);
> >> > +
> >> > +boolean_t
> >> > +OF_install(char *name, int prio)
> >> > +{
> >> > +       ofw_def_t *ofwp, **ofwpp;
> >> > +       static int curr_prio = 0;
> >> > +
> >> > +       /* Allow OF layer to be uninstalled */
> >> > +       if (name == NULL) {
> >> > +               ofw_def_impl = NULL;
> >> > +               return (FALSE);
> >> > +       }
> >> > +
> >> > +       /*
> >> > +        * Try and locate the OFW kobj corresponding to the name.
> >> > +        */
> >> > +       SET_FOREACH(ofwpp, ofw_set) {
> >> > +               ofwp = *ofwpp;
> >> > +
> >> > +               if (ofwp->name &&
> >> > +                   !strcmp(ofwp->name, name) &&
> >> > +                   prio >= curr_prio) {
> >> > +                       curr_prio = prio;
> >> > +                       ofw_def_impl = ofwp;
> >> > +                       return (TRUE);
> >> > +               }
> >> > +       }
> >> > +
> >> > +       return (FALSE);
> >> > +}
> >> > +
> >> > +/* Initializer */
> >> > +int
> >> > +OF_init(void *cookie)
> >> > +{
> >> > +       phandle_t chosen;
> >> > +       int rv;
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       ofw_obj = &ofw_kernel_obj;
> >> > +       /*
> >> > +        * Take care of compiling the selected class, and
> >> > +        * then statically initialize the OFW object.
> >> > +        */
> >> > +       kobj_class_compile_static(ofw_def_impl, &ofw_kernel_kops);
> >> > +       kobj_init_static((kobj_t)ofw_obj, ofw_def_impl);
> >> > +
> >> > +       rv = OFW_INIT(ofw_obj, cookie);
> >> > +
> >> > +       if ((chosen = OF_finddevice("/chosen")) != -1)
> >> > +               if (OF_getencprop(chosen, "stdout", &stdout,
> >> > +                   sizeof(stdout)) == -1)
> >> > +                       stdout = -1;
> >> > +
> >> > +       return (rv);
> >> > +}
> >> > +
> >> > +static void
> >> > +OF_putchar(int c, void *arg __unused)
> >> > +{
> >> > +       char cbuf;
> >> > +
> >> > +       if (c == '\n') {
> >> > +               cbuf = '\r';
> >> > +               OF_write(stdout, &cbuf, 1);
> >> > +       }
> >> > +
> >> > +       cbuf = c;
> >> > +       OF_write(stdout, &cbuf, 1);
> >> > +}
> >> > +
> >> > +void
> >> > +OF_printf(const char *fmt, ...)
> >> > +{
> >> > +       va_list va;
> >> > +
> >> > +       va_start(va, fmt);
> >> > +       (void)kvprintf(fmt, OF_putchar, NULL, 10, va);
> >> > +       va_end(va);
> >> > +}
> >> > +
> >> > +/*
> >> > + * Generic functions
> >> > + */
> >> > +
> >> > +/* Test to see if a service exists. */
> >> > +int
> >> > +OF_test(const char *name)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_TEST(ofw_obj, name));
> >> > +}
> >> > +
> >> > +int
> >> > +OF_interpret(const char *cmd, int nreturns, ...)
> >> > +{
> >> > +       va_list ap;
> >> > +       cell_t slots[16];
> >> > +       int i = 0;
> >> > +       int status;
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       status = OFW_INTERPRET(ofw_obj, cmd, nreturns, slots);
> >> > +       if (status == -1)
> >> > +               return (status);
> >> > +
> >> > +       va_start(ap, nreturns);
> >> > +       while (i < nreturns)
> >> > +               *va_arg(ap, cell_t *) = slots[i++];
> >> > +       va_end(ap);
> >> > +
> >> > +       return (status);
> >> > +}
> >> > +
> >> > +/*
> >> > + * Device tree functions
> >> > + */
> >> > +
> >> > +/* Return the next sibling of this node or 0. */
> >> > +phandle_t
> >> > +OF_peer(phandle_t node)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (0);
> >> > +
> >> > +       return (OFW_PEER(ofw_obj, node));
> >> > +}
> >> > +
> >> > +/* Return the first child of this node or 0. */
> >> > +phandle_t
> >> > +OF_child(phandle_t node)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (0);
> >> > +
> >> > +       return (OFW_CHILD(ofw_obj, node));
> >> > +}
> >> > +
> >> > +/* Return the parent of this node or 0. */
> >> > +phandle_t
> >> > +OF_parent(phandle_t node)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (0);
> >> > +
> >> > +       return (OFW_PARENT(ofw_obj, node));
> >> > +}
> >> > +
> >> > +/* Return the package handle that corresponds to an instance handle.
> */
> >> > +phandle_t
> >> > +OF_instance_to_package(ihandle_t instance)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_INSTANCE_TO_PACKAGE(ofw_obj, instance));
> >> > +}
> >> > +
> >> > +/* Get the length of a property of a package. */
> >> > +ssize_t
> >> > +OF_getproplen(phandle_t package, const char *propname)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_GETPROPLEN(ofw_obj, package, propname));
> >> > +}
> >> > +
> >> > +/* Check existence of a property of a package. */
> >> > +int
> >> > +OF_hasprop(phandle_t package, const char *propname)
> >> > +{
> >> > +
> >> > +       return (OF_getproplen(package, propname) >= 0 ? 1 : 0);
> >> > +}
> >> > +
> >> > +/* Get the value of a property of a package. */
> >> > +ssize_t
> >> > +OF_getprop(phandle_t package, const char *propname, void *buf,
> size_t buflen)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_GETPROP(ofw_obj, package, propname, buf, buflen));
> >> > +}
> >> > +
> >> > +ssize_t
> >> > +OF_getencprop(phandle_t node, const char *propname, pcell_t *buf,
> size_t len)
> >> > +{
> >> > +       ssize_t retval;
> >> > +       int i;
> >> > +
> >> > +       KASSERT(len % 4 == 0, ("Need a multiple of 4 bytes"));
> >> > +
> >> > +       retval = OF_getprop(node, propname, buf, len);
> >> > +       if (retval <= 0)
> >> > +               return (retval);
> >> > +
> >> > +       for (i = 0; i < len/4; i++)
> >> > +               buf[i] = be32toh(buf[i]);
> >> > +
> >> > +       return (retval);
> >> > +}
> >> > +
> >> > +/*
> >> > + * Recursively search the node and its parent for the given
> property, working
> >> > + * downward from the node to the device tree root.  Returns the
> value of the
> >> > + * first match.
> >> > + */
> >> > +ssize_t
> >> > +OF_searchprop(phandle_t node, const char *propname, void *buf,
> size_t len)
> >> > +{
> >> > +       ssize_t rv;
> >> > +
> >> > +       for (; node != 0; node = OF_parent(node))
> >> > +               if ((rv = OF_getprop(node, propname, buf, len)) != -1)
> >> > +                       return (rv);
> >> > +       return (-1);
> >> > +}
> >> > +
> >> > +ssize_t
> >> > +OF_searchencprop(phandle_t node, const char *propname, pcell_t *buf,
> size_t len)
> >> > +{
> >> > +       ssize_t rv;
> >> > +
> >> > +       for (; node != 0; node = OF_parent(node))
> >> > +               if ((rv = OF_getencprop(node, propname, buf, len)) !=
> -1)
> >> > +                       return (rv);
> >> > +       return (-1);
> >> > +}
> >> > +
> >> > +/*
> >> > + * Store the value of a property of a package into newly allocated
> memory
> >> > + * (using the M_OFWPROP malloc pool and M_WAITOK).
> >> > + */
> >> > +ssize_t
> >> > +OF_getprop_alloc(phandle_t package, const char *propname, void **buf)
> >> > +{
> >> > +       int len;
> >> > +
> >> > +       *buf = NULL;
> >> > +       if ((len = OF_getproplen(package, propname)) == -1)
> >> > +               return (-1);
> >> > +
> >> > +       if (len > 0) {
> >> > +               *buf = malloc(len, M_OFWPROP, M_WAITOK);
> >> > +               if (OF_getprop(package, propname, *buf, len) == -1) {
> >> > +                       free(*buf, M_OFWPROP);
> >> > +                       *buf = NULL;
> >> > +                       return (-1);
> >> > +               }
> >> > +       }
> >> > +       return (len);
> >> > +}
> >> > +
> >> > +/*
> >> > + * Store the value of a property of a package into newly allocated
> memory
> >> > + * (using the M_OFWPROP malloc pool and M_WAITOK).  elsz is the size
> of a
> >> > + * single element, the number of elements is return in number.
> >> > + */
> >> > +ssize_t
> >> > +OF_getprop_alloc_multi(phandle_t package, const char *propname, int
> elsz, void **buf)
> >> > +{
> >> > +       int len;
> >> > +
> >> > +       *buf = NULL;
> >> > +       if ((len = OF_getproplen(package, propname)) == -1 ||
> >> > +           len % elsz != 0)
> >> > +               return (-1);
> >> > +
> >> > +       if (len > 0) {
> >> > +               *buf = malloc(len, M_OFWPROP, M_WAITOK);
> >> > +               if (OF_getprop(package, propname, *buf, len) == -1) {
> >> > +                       free(*buf, M_OFWPROP);
> >> > +                       *buf = NULL;
> >> > +                       return (-1);
> >> > +               }
> >> > +       }
> >> > +       return (len / elsz);
> >> > +}
> >> > +
> >> > +ssize_t
> >> > +OF_getencprop_alloc(phandle_t package, const char *name, void **buf)
> >> > +{
> >> > +       ssize_t ret;
> >> > +
> >> > +       ret = OF_getencprop_alloc_multi(package, name,
> sizeof(pcell_t),
> >> > +           buf);
> >> > +       if (ret < 0)
> >> > +               return (ret);
> >> > +       else
> >> > +               return (ret * sizeof(pcell_t));
> >> > +}
> >> > +
> >> > +ssize_t
> >> > +OF_getencprop_alloc_multi(phandle_t package, const char *name, int
> elsz,
> >> > +    void **buf)
> >> > +{
> >> > +       ssize_t retval;
> >> > +       pcell_t *cell;
> >> > +       int i;
> >> > +
> >> > +       retval = OF_getprop_alloc_multi(package, name, elsz, buf);
> >> > +       if (retval == -1)
> >> > +               return (-1);
> >> > +
> >> > +       cell = *buf;
> >> > +       for (i = 0; i < retval * elsz / 4; i++)
> >> > +               cell[i] = be32toh(cell[i]);
> >> > +
> >> > +       return (retval);
> >> > +}
> >> > +
> >> > +/* Free buffer allocated by OF_getencprop_alloc or OF_getprop_alloc
> */
> >> > +void OF_prop_free(void *buf)
> >> > +{
> >> > +
> >> > +       free(buf, M_OFWPROP);
> >> > +}
> >> > +
> >> > +/* Get the next property of a package. */
> >> > +int
> >> > +OF_nextprop(phandle_t package, const char *previous, char *buf,
> size_t size)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_NEXTPROP(ofw_obj, package, previous, buf, size));
> >> > +}
> >> > +
> >> > +/* Set the value of a property of a package. */
> >> > +int
> >> > +OF_setprop(phandle_t package, const char *propname, const void *buf,
> size_t len)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_SETPROP(ofw_obj, package, propname, buf,len));
> >> > +}
> >> > +
> >> > +/* Convert a device specifier to a fully qualified pathname. */
> >> > +ssize_t
> >> > +OF_canon(const char *device, char *buf, size_t len)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_CANON(ofw_obj, device, buf, len));
> >> > +}
> >> > +
> >> > +/* Return a package handle for the specified device. */
> >> > +phandle_t
> >> > +OF_finddevice(const char *device)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_FINDDEVICE(ofw_obj, device));
> >> > +}
> >> > +
> >> > +/* Return the fully qualified pathname corresponding to an instance.
> */
> >> > +ssize_t
> >> > +OF_instance_to_path(ihandle_t instance, char *buf, size_t len)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_INSTANCE_TO_PATH(ofw_obj, instance, buf, len));
> >> > +}
> >> > +
> >> > +/* Return the fully qualified pathname corresponding to a package. */
> >> > +ssize_t
> >> > +OF_package_to_path(phandle_t package, char *buf, size_t len)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_PACKAGE_TO_PATH(ofw_obj, package, buf, len));
> >> > +}
> >> > +
> >> > +/* Look up effective phandle (see FDT/PAPR spec) */
> >> > +static phandle_t
> >> > +OF_child_xref_phandle(phandle_t parent, phandle_t xref)
> >> > +{
> >> > +       phandle_t child, rxref;
> >> > +
> >> > +       /*
> >> > +        * Recursively descend from parent, looking for a node with a
> property
> >> > +        * named either "phandle", "ibm,phandle", or "linux,phandle"
> that
> >> > +        * matches the xref we are looking for.
> >> > +        */
> >> > +
> >> > +       for (child = OF_child(parent); child != 0; child =
> OF_peer(child)) {
> >> > +               rxref = OF_child_xref_phandle(child, xref);
> >> > +               if (rxref != -1)
> >> > +                       return (rxref);
> >> > +
> >> > +               if (OF_getencprop(child, "phandle", &rxref,
> sizeof(rxref)) ==
> >> > +                   -1 && OF_getencprop(child, "ibm,phandle", &rxref,
> >> > +                   sizeof(rxref)) == -1 && OF_getencprop(child,
> >> > +                   "linux,phandle", &rxref, sizeof(rxref)) == -1)
> >> > +                       continue;
> >> > +
> >> > +               if (rxref == xref)
> >> > +                       return (child);
> >> > +       }
> >> > +
> >> > +       return (-1);
> >> > +}
> >> > +
> >> > +phandle_t
> >> > +OF_node_from_xref(phandle_t xref)
> >> > +{
> >> > +       struct xrefinfo *xi;
> >> > +       phandle_t node;
> >> > +
> >> > +       if (xref_init_done) {
> >> > +               if ((xi = xrefinfo_find(xref, FIND_BY_XREF)) == NULL)
> >> > +                       return (xref);
> >> > +               return (xi->node);
> >> > +       }
> >> > +
> >> > +       if ((node = OF_child_xref_phandle(OF_peer(0), xref)) == -1)
> >> > +               return (xref);
> >> > +       return (node);
> >> > +}
> >> > +
> >> > +phandle_t
> >> > +OF_xref_from_node(phandle_t node)
> >> > +{
> >> > +       struct xrefinfo *xi;
> >> > +       phandle_t xref;
> >> > +
> >> > +       if (xref_init_done) {
> >> > +               if ((xi = xrefinfo_find(node, FIND_BY_NODE)) == NULL)
> >> > +                       return (node);
> >> > +               return (xi->xref);
> >> > +       }
> >> > +
> >> > +       if (OF_getencprop(node, "phandle", &xref, sizeof(xref)) == -1
> &&
> >> > +           OF_getencprop(node, "ibm,phandle", &xref, sizeof(xref))
> == -1 &&
> >> > +           OF_getencprop(node, "linux,phandle", &xref, sizeof(xref))
> == -1)
> >> > +               return (node);
> >> > +       return (xref);
> >> > +}
> >> > +
> >> > +device_t
> >> > +OF_device_from_xref(phandle_t xref)
> >> > +{
> >> > +       struct xrefinfo *xi;
> >> > +
> >> > +       if (xref_init_done) {
> >> > +               if ((xi = xrefinfo_find(xref, FIND_BY_XREF)) == NULL)
> >> > +                       return (NULL);
> >> > +               return (xi->dev);
> >> > +       }
> >> > +       panic("Attempt to find device before xreflist_init");
> >> > +}
> >> > +
> >> > +phandle_t
> >> > +OF_xref_from_device(device_t dev)
> >> > +{
> >> > +       struct xrefinfo *xi;
> >> > +
> >> > +       if (xref_init_done) {
> >> > +               if ((xi = xrefinfo_find((uintptr_t)dev, FIND_BY_DEV))
> == NULL)
> >> > +                       return (0);
> >> > +               return (xi->xref);
> >> > +       }
> >> > +       panic("Attempt to find xref before xreflist_init");
> >> > +}
> >> > +
> >> > +int
> >> > +OF_device_register_xref(phandle_t xref, device_t dev)
> >> > +{
> >> > +       struct xrefinfo *xi;
> >> > +
> >> > +       /*
> >> > +        * If the given xref handle doesn't already exist in the list
> then we
> >> > +        * add a list entry.  In theory this can only happen on a
> system where
> >> > +        * nodes don't contain phandle properties and xref and node
> handles are
> >> > +        * synonymous, so the xref handle is added as the node handle
> as well.
> >> > +        */
> >> > +       if (xref_init_done) {
> >> > +               if ((xi = xrefinfo_find(xref, FIND_BY_XREF)) == NULL)
> >> > +                       xrefinfo_add(xref, xref, dev);
> >> > +               else
> >> > +                       xi->dev = dev;
> >> > +               return (0);
> >> > +       }
> >> > +       panic("Attempt to register device before xreflist_init");
> >> > +}
> >> > +
> >> > +/*  Call the method in the scope of a given instance. */
> >> > +int
> >> > +OF_call_method(const char *method, ihandle_t instance, int nargs,
> int nreturns,
> >> > +    ...)
> >> > +{
> >> > +       va_list ap;
> >> > +       cell_t args_n_results[12];
> >> > +       int n, status;
> >> > +
> >> > +       if (nargs > 6 || ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +       va_start(ap, nreturns);
> >> > +       for (n = 0; n < nargs; n++)
> >> > +               args_n_results[n] = va_arg(ap, cell_t);
> >> > +
> >> > +       status = OFW_CALL_METHOD(ofw_obj, instance, method, nargs,
> nreturns,
> >> > +           args_n_results);
> >> > +       if (status != 0)
> >> > +               return (status);
> >> > +
> >> > +       for (; n < nargs + nreturns; n++)
> >> > +               *va_arg(ap, cell_t *) = args_n_results[n];
> >> > +       va_end(ap);
> >> > +       return (0);
> >> > +}
> >> > +
> >> > +/*
> >> > + * Device I/O functions
> >> > + */
> >> > +
> >> > +/* Open an instance for a device. */
> >> > +ihandle_t
> >> > +OF_open(const char *device)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (0);
> >> > +
> >> > +       return (OFW_OPEN(ofw_obj, device));
> >> > +}
> >> > +
> >> > +/* Close an instance. */
> >> > +void
> >> > +OF_close(ihandle_t instance)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return;
> >> > +
> >> > +       OFW_CLOSE(ofw_obj, instance);
> >> > +}
> >> > +
> >> > +/* Read from an instance. */
> >> > +ssize_t
> >> > +OF_read(ihandle_t instance, void *addr, size_t len)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_READ(ofw_obj, instance, addr, len));
> >> > +}
> >> > +
> >> > +/* Write to an instance. */
> >> > +ssize_t
> >> > +OF_write(ihandle_t instance, const void *addr, size_t len)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_WRITE(ofw_obj, instance, addr, len));
> >> > +}
> >> > +
> >> > +/* Seek to a position. */
> >> > +int
> >> > +OF_seek(ihandle_t instance, uint64_t pos)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return (-1);
> >> > +
> >> > +       return (OFW_SEEK(ofw_obj, instance, pos));
> >> > +}
> >> > +
> >> > +/*
> >> > + * Memory functions
> >> > + */
> >> > +
> >> > +/* Claim an area of memory. */
> >> > +void *
> >> > +OF_claim(void *virt, size_t size, u_int align)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return ((void *)-1);
> >> > +
> >> > +       return (OFW_CLAIM(ofw_obj, virt, size, align));
> >> > +}
> >> > +
> >> > +/* Release an area of memory. */
> >> > +void
> >> > +OF_release(void *virt, size_t size)
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return;
> >> > +
> >> > +       OFW_RELEASE(ofw_obj, virt, size);
> >> > +}
> >> > +
> >> > +/*
> >> > + * Control transfer functions
> >> > + */
> >> > +
> >> > +/* Suspend and drop back to the Open Firmware interface. */
> >> > +void
> >> > +OF_enter()
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               return;
> >> > +
> >> > +       OFW_ENTER(ofw_obj);
> >> > +}
> >> > +
> >> > +/* Shut down and drop back to the Open Firmware interface. */
> >> > +void
> >> > +OF_exit()
> >> > +{
> >> > +
> >> > +       if (ofw_def_impl == NULL)
> >> > +               panic("OF_exit: Open Firmware not available");
> >> > +
> >> > +       /* Should not return */
> >> > +       OFW_EXIT(ofw_obj);
> >> > +
> >> > +       for (;;)                        /* just in case */
> >> > +               ;
> >> > +}
> >> > \ No newline at end of file
> >> > --
> >> > 2.17.1
> >> >
>
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