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

Gedare Bloom gedare at rtems.org
Wed Jul 29 15:54:34 UTC 2020


I'm a little concerned about namespace pollution.

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.
> + * 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.
> + *
> + * $FreeBSD$
> + */
> +
> +#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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