I'm a little concerned about namespace pollution.
On Wed, Jul 15, 2020 at 12:32 AM G S Niteesh Babu <[email protected]> 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 > _______________________________________________ devel mailing list [email protected] http://lists.rtems.org/mailman/listinfo/devel
