/*- * Copyright (c) 2001 - 2003 by Thomas Moestl . * Copyright (c) 2005 Marius Strobl * 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, * without modification, immediately at the beginning of the file. * 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 __FBSDID("$FreeBSD$"); #include "opt_platform.h" #include #include #include #include #include #include #include #include #include #include "ofw_bus_if.h" #define OFW_COMPAT_LEN 255 #define OFW_STATUS_LEN 16 int ofw_bus_gen_setup_devinfo(struct ofw_bus_devinfo *obd, phandle_t node) { if (obd == NULL) return (ENOMEM); /* The 'name' property is considered mandatory. */ if ((OF_getprop_alloc(node, "name", 1, (void **)&obd->obd_name)) == -1) return (EINVAL); OF_getprop_alloc(node, "compatible", 1, (void **)&obd->obd_compat); OF_getprop_alloc(node, "device_type", 1, (void **)&obd->obd_type); OF_getprop_alloc(node, "model", 1, (void **)&obd->obd_model); OF_getprop_alloc(node, "status", 1, (void **)&obd->obd_status); obd->obd_node = node; return (0); } void ofw_bus_gen_destroy_devinfo(struct ofw_bus_devinfo *obd) { if (obd == NULL) return; if (obd->obd_compat != NULL) free(obd->obd_compat, M_OFWPROP); if (obd->obd_model != NULL) free(obd->obd_model, M_OFWPROP); if (obd->obd_name != NULL) free(obd->obd_name, M_OFWPROP); if (obd->obd_type != NULL) free(obd->obd_type, M_OFWPROP); if (obd->obd_status != NULL) free(obd->obd_status, M_OFWPROP); } int ofw_bus_gen_child_pnpinfo_str(device_t cbdev, device_t child, char *buf, size_t buflen) { if (ofw_bus_get_name(child) != NULL) { strlcat(buf, "name=", buflen); strlcat(buf, ofw_bus_get_name(child), buflen); } if (ofw_bus_get_compat(child) != NULL) { strlcat(buf, " compat=", buflen); strlcat(buf, ofw_bus_get_compat(child), buflen); } return (0); }; const char * ofw_bus_gen_get_compat(device_t bus, device_t dev) { const struct ofw_bus_devinfo *obd; obd = OFW_BUS_GET_DEVINFO(bus, dev); if (obd == NULL) return (NULL); return (obd->obd_compat); } const char * ofw_bus_gen_get_model(device_t bus, device_t dev) { const struct ofw_bus_devinfo *obd; obd = OFW_BUS_GET_DEVINFO(bus, dev); if (obd == NULL) return (NULL); return (obd->obd_model); } const char * ofw_bus_gen_get_name(device_t bus, device_t dev) { const struct ofw_bus_devinfo *obd; obd = OFW_BUS_GET_DEVINFO(bus, dev); if (obd == NULL) return (NULL); return (obd->obd_name); } phandle_t ofw_bus_gen_get_node(device_t bus, device_t dev) { const struct ofw_bus_devinfo *obd; obd = OFW_BUS_GET_DEVINFO(bus, dev); if (obd == NULL) return (0); return (obd->obd_node); } const char * ofw_bus_gen_get_type(device_t bus, device_t dev) { const struct ofw_bus_devinfo *obd; obd = OFW_BUS_GET_DEVINFO(bus, dev); if (obd == NULL) return (NULL); return (obd->obd_type); } const char * ofw_bus_get_status(device_t dev) { const struct ofw_bus_devinfo *obd; obd = OFW_BUS_GET_DEVINFO(device_get_parent(dev), dev); if (obd == NULL) return (NULL); return (obd->obd_status); } int ofw_bus_status_okay(device_t dev) { const char *status; status = ofw_bus_get_status(dev); if (status == NULL || strcmp(status, "okay") == 0 || strcmp(status, "ok") == 0) return (1); return (0); } int ofw_bus_node_status_okay(phandle_t node) { char status[OFW_STATUS_LEN]; int len; len = OF_getproplen(node, "status"); if (len <= 0) return (1); OF_getprop(node, "status", status, OFW_STATUS_LEN); if ((len == 5 && (bcmp(status, "okay", len) == 0)) || (len == 3 && (bcmp(status, "ok", len)))) return (1); return (0); } static int ofw_bus_node_is_compatible_int(const char *compat, int len, const char *onecompat) { int onelen, l, ret; onelen = strlen(onecompat); ret = 0; while (len > 0) { if (strlen(compat) == onelen && strncasecmp(compat, onecompat, onelen) == 0) { /* Found it. */ ret = 1; break; } /* Slide to the next sub-string. */ l = strlen(compat) + 1; compat += l; len -= l; } return (ret); } int ofw_bus_node_is_compatible(phandle_t node, const char *compatstr) { char compat[OFW_COMPAT_LEN]; int len, rv; if ((len = OF_getproplen(node, "compatible")) <= 0) return (0); bzero(compat, OFW_COMPAT_LEN); if (OF_getprop(node, "compatible", compat, OFW_COMPAT_LEN) < 0) return (0); rv = ofw_bus_node_is_compatible_int(compat, len, compatstr); return (rv); } int ofw_bus_is_compatible(device_t dev, const char *onecompat) { phandle_t node; const char *compat; int len; if ((compat = ofw_bus_get_compat(dev)) == NULL) return (0); if ((node = ofw_bus_get_node(dev)) == -1) return (0); /* Get total 'compatible' prop len */ if ((len = OF_getproplen(node, "compatible")) <= 0) return (0); return (ofw_bus_node_is_compatible_int(compat, len, onecompat)); } int ofw_bus_is_compatible_strict(device_t dev, const char *compatible) { const char *compat; size_t len; if ((compat = ofw_bus_get_compat(dev)) == NULL) return (0); len = strlen(compatible); if (strlen(compat) == len && strncasecmp(compat, compatible, len) == 0) return (1); return (0); } const struct ofw_compat_data * ofw_bus_search_compatible(device_t dev, const struct ofw_compat_data *compat) { if (compat == NULL) return NULL; for (; compat->ocd_str != NULL; ++compat) { if (ofw_bus_is_compatible(dev, compat->ocd_str)) break; } return (compat); } int ofw_bus_has_prop(device_t dev, const char *propname) { phandle_t node; if ((node = ofw_bus_get_node(dev)) == -1) return (0); return (OF_hasprop(node, propname)); } void ofw_bus_setup_iinfo(phandle_t node, struct ofw_bus_iinfo *ii, int intrsz) { pcell_t addrc; int msksz; if (OF_getencprop(node, "#address-cells", &addrc, sizeof(addrc)) == -1) addrc = 2; ii->opi_addrc = addrc * sizeof(pcell_t); ii->opi_imapsz = OF_getencprop_alloc(node, "interrupt-map", 1, (void **)&ii->opi_imap); if (ii->opi_imapsz > 0) { msksz = OF_getencprop_alloc(node, "interrupt-map-mask", 1, (void **)&ii->opi_imapmsk); /* * Failure to get the mask is ignored; a full mask is used * then. We barf on bad mask sizes, however. */ if (msksz != -1 && msksz != ii->opi_addrc + intrsz) panic("ofw_bus_setup_iinfo: bad interrupt-map-mask " "property!"); } } int ofw_bus_lookup_imap(phandle_t node, struct ofw_bus_iinfo *ii, void *reg, int regsz, void *pintr, int pintrsz, void *mintr, int mintrsz, phandle_t *iparent) { uint8_t maskbuf[regsz + pintrsz]; int rv; if (ii->opi_imapsz <= 0) return (0); KASSERT(regsz >= ii->opi_addrc, ("ofw_bus_lookup_imap: register size too small: %d < %d", regsz, ii->opi_addrc)); if (node != -1) { rv = OF_getencprop(node, "reg", reg, regsz); if (rv < regsz) panic("ofw_bus_lookup_imap: cannot get reg property"); } return (ofw_bus_search_intrmap(pintr, pintrsz, reg, ii->opi_addrc, ii->opi_imap, ii->opi_imapsz, ii->opi_imapmsk, maskbuf, mintr, mintrsz, iparent)); } /* * Map an interrupt using the firmware reg, interrupt-map and * interrupt-map-mask properties. * The interrupt property to be mapped must be of size intrsz, and pointed to * by intr. The regs property of the node for which the mapping is done must * be passed as regs. This property is an array of register specifications; * the size of the address part of such a specification must be passed as * physsz. Only the first element of the property is used. * imap and imapsz hold the interrupt mask and it's size. * imapmsk is a pointer to the interrupt-map-mask property, which must have * a size of physsz + intrsz; it may be NULL, in which case a full mask is * assumed. * maskbuf must point to a buffer of length physsz + intrsz. * The interrupt is returned in result, which must point to a buffer of length * rintrsz (which gives the expected size of the mapped interrupt). * Returns number of cells in the interrupt if a mapping was found, 0 otherwise. */ int ofw_bus_search_intrmap(void *intr, int intrsz, void *regs, int physsz, void *imap, int imapsz, void *imapmsk, void *maskbuf, void *result, int rintrsz, phandle_t *iparent) { phandle_t parent; uint8_t *ref = maskbuf; uint8_t *uiintr = intr; uint8_t *uiregs = regs; uint8_t *uiimapmsk = imapmsk; uint8_t *mptr; pcell_t paddrsz; pcell_t pintrsz; int i, rsz, tsz; rsz = -1; if (imapmsk != NULL) { for (i = 0; i < physsz; i++) ref[i] = uiregs[i] & uiimapmsk[i]; for (i = 0; i < intrsz; i++) ref[physsz + i] = uiintr[i] & uiimapmsk[physsz + i]; } else { bcopy(regs, ref, physsz); bcopy(intr, ref + physsz, intrsz); } mptr = imap; i = imapsz; paddrsz = 0; while (i > 0) { bcopy(mptr + physsz + intrsz, &parent, sizeof(parent)); #ifndef OFW_IMAP_NO_IPARENT_ADDR_CELLS /* * Find if we need to read the parent address data. * CHRP-derived OF bindings, including ePAPR-compliant FDTs, * use this as an optional part of the specifier. */ if (OF_getencprop(OF_node_from_xref(parent), "#address-cells", &paddrsz, sizeof(paddrsz)) == -1) paddrsz = 0; /* default */ paddrsz *= sizeof(pcell_t); #endif if (OF_searchencprop(OF_node_from_xref(parent), "#interrupt-cells", &pintrsz, sizeof(pintrsz)) == -1) pintrsz = 1; /* default */ pintrsz *= sizeof(pcell_t); /* Compute the map stride size. */ tsz = physsz + intrsz + sizeof(phandle_t) + paddrsz + pintrsz; KASSERT(i >= tsz, ("ofw_bus_search_intrmap: truncated map")); if (bcmp(ref, mptr, physsz + intrsz) == 0) { bcopy(mptr + physsz + intrsz + sizeof(parent) + paddrsz, result, MIN(rintrsz, pintrsz)); if (iparent != NULL) *iparent = parent; return (pintrsz/sizeof(pcell_t)); } mptr += tsz; i -= tsz; } return (0); } int ofw_bus_msimap(phandle_t node, uint16_t pci_rid, phandle_t *msi_parent, uint32_t *msi_rid) { pcell_t *map, mask, msi_base, rid_base, rid_length; ssize_t len; uint32_t masked_rid, rid; int err, i; /* TODO: This should be OF_searchprop_alloc if we had it */ len = OF_getencprop_alloc(node, "msi-map", sizeof(*map), (void **)&map); if (len < 0) { if (msi_parent != NULL) { *msi_parent = 0; OF_getencprop(node, "msi-parent", msi_parent, sizeof(*msi_parent)); } if (msi_rid != NULL) *msi_rid = pci_rid; return (0); } err = ENOENT; rid = 0; mask = 0xffffffff; OF_getencprop(node, "msi-map-mask", &mask, sizeof(mask)); masked_rid = pci_rid & mask; for (i = 0; i < len; i += 4) { rid_base = map[i + 0]; rid_length = map[i + 3]; if (masked_rid < rid_base || masked_rid >= (rid_base + rid_length)) continue; msi_base = map[i + 2]; if (msi_parent != NULL) *msi_parent = map[i + 1]; if (msi_rid != NULL) *msi_rid = masked_rid - rid_base + msi_base; err = 0; break; } free(map, M_OFWPROP); return (err); } int ofw_bus_reg_to_rl(device_t dev, phandle_t node, pcell_t acells, pcell_t scells, struct resource_list *rl) { uint64_t phys, size; ssize_t i, j, rid, nreg, ret; uint32_t *reg; char *name; /* * This may be just redundant when having ofw_bus_devinfo * but makes this routine independent of it. */ ret = OF_getprop_alloc(node, "name", sizeof(*name), (void **)&name); if (ret == -1) name = NULL; ret = OF_getencprop_alloc(node, "reg", sizeof(*reg), (void **)®); nreg = (ret == -1) ? 0 : ret; if (nreg % (acells + scells) != 0) { if (bootverbose) device_printf(dev, "Malformed reg property on <%s>\n", (name == NULL) ? "unknown" : name); nreg = 0; } for (i = 0, rid = 0; i < nreg; i += acells + scells, rid++) { phys = size = 0; for (j = 0; j < acells; j++) { phys <<= 32; phys |= reg[i + j]; } for (j = 0; j < scells; j++) { size <<= 32; size |= reg[i + acells + j]; } /* Skip the dummy reg property of glue devices like ssm(4). */ if (size != 0) resource_list_add(rl, SYS_RES_MEMORY, rid, phys, phys + size - 1, size); } free(name, M_OFWPROP); free(reg, M_OFWPROP); return (0); } /* * Get interrupt parent for given node. * Returns 0 if interrupt parent doesn't exist. */ phandle_t ofw_bus_find_iparent(phandle_t node) { phandle_t iparent; if (OF_searchencprop(node, "interrupt-parent", &iparent, sizeof(iparent)) == -1) { for (iparent = node; iparent != 0; iparent = OF_parent(iparent)) { if (OF_hasprop(iparent, "interrupt-controller")) break; } iparent = OF_xref_from_node(iparent); } return (iparent); } int ofw_bus_intr_to_rl(device_t dev, phandle_t node, struct resource_list *rl, int *rlen) { phandle_t iparent; uint32_t icells, *intr; int err, i, irqnum, nintr, rid; boolean_t extended; nintr = OF_getencprop_alloc(node, "interrupts", sizeof(*intr), (void **)&intr); if (nintr > 0) { iparent = ofw_bus_find_iparent(node); if (iparent == 0) { device_printf(dev, "No interrupt-parent found, " "assuming direct parent\n"); iparent = OF_parent(node); iparent = OF_xref_from_node(iparent); } if (OF_searchencprop(OF_node_from_xref(iparent), "#interrupt-cells", &icells, sizeof(icells)) == -1) { device_printf(dev, "Missing #interrupt-cells " "property, assuming <1>\n"); icells = 1; } if (icells < 1 || icells > nintr) { device_printf(dev, "Invalid #interrupt-cells property " "value <%d>, assuming <1>\n", icells); icells = 1; } extended = false; } else { nintr = OF_getencprop_alloc(node, "interrupts-extended", sizeof(*intr), (void **)&intr); if (nintr <= 0) return (0); extended = true; } err = 0; rid = 0; for (i = 0; i < nintr; i += icells) { if (extended) { iparent = intr[i++]; if (OF_searchencprop(OF_node_from_xref(iparent), "#interrupt-cells", &icells, sizeof(icells)) == -1) { device_printf(dev, "Missing #interrupt-cells " "property\n"); err = ENOENT; break; } if (icells < 1 || (i + icells) > nintr) { device_printf(dev, "Invalid #interrupt-cells " "property value <%d>\n", icells); err = ERANGE; break; } } irqnum = ofw_bus_map_intr(dev, iparent, icells, &intr[i]); resource_list_add(rl, SYS_RES_IRQ, rid++, irqnum, irqnum, 1); } if (rlen != NULL) *rlen = rid; free(intr, M_OFWPROP); return (err); } int ofw_bus_intr_by_rid(device_t dev, phandle_t node, int wanted_rid, phandle_t *producer, int *ncells, pcell_t **cells) { phandle_t iparent; uint32_t icells, *intr; int err, i, nintr, rid; boolean_t extended; nintr = OF_getencprop_alloc(node, "interrupts", sizeof(*intr), (void **)&intr); if (nintr > 0) { iparent = ofw_bus_find_iparent(node); if (iparent == 0) { device_printf(dev, "No interrupt-parent found, " "assuming direct parent\n"); iparent = OF_parent(node); iparent = OF_xref_from_node(iparent); } if (OF_searchencprop(OF_node_from_xref(iparent), "#interrupt-cells", &icells, sizeof(icells)) == -1) { device_printf(dev, "Missing #interrupt-cells " "property, assuming <1>\n"); icells = 1; } if (icells < 1 || icells > nintr) { device_printf(dev, "Invalid #interrupt-cells property " "value <%d>, assuming <1>\n", icells); icells = 1; } extended = false; } else { nintr = OF_getencprop_alloc(node, "interrupts-extended", sizeof(*intr), (void **)&intr); if (nintr <= 0) return (ESRCH); extended = true; } err = ESRCH; rid = 0; for (i = 0; i < nintr; i += icells, rid++) { if (extended) { iparent = intr[i++]; if (OF_searchencprop(OF_node_from_xref(iparent), "#interrupt-cells", &icells, sizeof(icells)) == -1) { device_printf(dev, "Missing #interrupt-cells " "property\n"); err = ENOENT; break; } if (icells < 1 || (i + icells) > nintr) { device_printf(dev, "Invalid #interrupt-cells " "property value <%d>\n", icells); err = ERANGE; break; } } if (rid == wanted_rid) { *cells = malloc(icells * sizeof(**cells), M_OFWPROP, M_WAITOK); *producer = iparent; *ncells= icells; memcpy(*cells, intr + i, icells * sizeof(**cells)); err = 0; break; } } free(intr, M_OFWPROP); return (err); } phandle_t ofw_bus_find_child(phandle_t start, const char *child_name) { char *name; int ret; phandle_t child; for (child = OF_child(start); child != 0; child = OF_peer(child)) { ret = OF_getprop_alloc(child, "name", sizeof(*name), (void **)&name); if (ret == -1) continue; if (strcmp(name, child_name) == 0) { free(name, M_OFWPROP); return (child); } free(name, M_OFWPROP); } return (0); } phandle_t ofw_bus_find_compatible(phandle_t node, const char *onecompat) { phandle_t child, ret; void *compat; int len; /* * Traverse all children of 'start' node, and find first with * matching 'compatible' property. */ for (child = OF_child(node); child != 0; child = OF_peer(child)) { len = OF_getprop_alloc(child, "compatible", 1, &compat); if (len >= 0) { ret = ofw_bus_node_is_compatible_int(compat, len, onecompat); free(compat, M_OFWPROP); if (ret != 0) return (child); } ret = ofw_bus_find_compatible(child, onecompat); if (ret != 0) return (ret); } return (0); } /** * @brief Return child of bus whose phandle is node * * A direct child of @p will be returned if it its phandle in the * OFW tree is @p node. Otherwise, NULL is returned. * * @param bus The bus to examine * @param node The phandle_t to look for. */ device_t ofw_bus_find_child_device_by_phandle(device_t bus, phandle_t node) { device_t *children, retval, child; int nkid, i; /* * Nothing can match the flag value for no node. */ if (node == -1) return (NULL); /* * Search the children for a match. We microoptimize * a bit by not using ofw_bus_get since we already know * the parent. We do not recurse. */ if (device_get_children(bus, &children, &nkid) != 0) return (NULL); retval = NULL; for (i = 0; i < nkid; i++) { child = children[i]; if (OFW_BUS_GET_NODE(bus, child) == node) { retval = child; break; } } free(children, M_TEMP); return (retval); } /* * Parse property that contain list of xrefs and values * (like standard "clocks" and "resets" properties) * Input arguments: * node - consumers device node * list_name - name of parsed list - "clocks" * cells_name - name of size property - "#clock-cells" * idx - the index of the requested list entry, or, if -1, an indication * to return the number of entries in the parsed list. * Output arguments: * producer - handle of producer * ncells - number of cells in result or the number of items in the list when * idx == -1. * cells - array of decoded cells */ static int ofw_bus_parse_xref_list_internal(phandle_t node, const char *list_name, const char *cells_name, int idx, phandle_t *producer, int *ncells, pcell_t **cells) { phandle_t pnode; phandle_t *elems; uint32_t pcells; int rv, i, j, nelems, cnt; elems = NULL; nelems = OF_getencprop_alloc(node, list_name, sizeof(*elems), (void **)&elems); if (nelems <= 0) return (ENOENT); rv = (idx == -1) ? 0 : ENOENT; for (i = 0, cnt = 0; i < nelems; i += pcells, cnt++) { pnode = elems[i++]; if (OF_getencprop(OF_node_from_xref(pnode), cells_name, &pcells, sizeof(pcells)) == -1) { printf("Missing %s property\n", cells_name); rv = ENOENT; break; } if ((i + pcells) > nelems) { printf("Invalid %s property value <%d>\n", cells_name, pcells); rv = ERANGE; break; } if (cnt == idx) { *cells= malloc(pcells * sizeof(**cells), M_OFWPROP, M_WAITOK); *producer = pnode; *ncells = pcells; for (j = 0; j < pcells; j++) (*cells)[j] = elems[i + j]; rv = 0; break; } } if (elems != NULL) free(elems, M_OFWPROP); if (idx == -1 && rv == 0) *ncells = cnt; return (rv); } /* * Parse property that contain list of xrefs and values * (like standard "clocks" and "resets" properties) * Input arguments: * node - consumers device node * list_name - name of parsed list - "clocks" * cells_name - name of size property - "#clock-cells" * idx - the index of the requested list entry (>= 0) * Output arguments: * producer - handle of producer * ncells - number of cells in result * cells - array of decoded cells */ int ofw_bus_parse_xref_list_alloc(phandle_t node, const char *list_name, const char *cells_name, int idx, phandle_t *producer, int *ncells, pcell_t **cells) { KASSERT(idx >= 0, ("ofw_bus_parse_xref_list_alloc: negative index supplied")); return (ofw_bus_parse_xref_list_internal(node, list_name, cells_name, idx, producer, ncells, cells)); } /* * Parse property that contain list of xrefs and values * (like standard "clocks" and "resets" properties) * and determine the number of items in the list * Input arguments: * node - consumers device node * list_name - name of parsed list - "clocks" * cells_name - name of size property - "#clock-cells" * Output arguments: * count - number of items in list */ int ofw_bus_parse_xref_list_get_length(phandle_t node, const char *list_name, const char *cells_name, int *count) { return (ofw_bus_parse_xref_list_internal(node, list_name, cells_name, -1, NULL, count, NULL)); } /* * Find index of string in string list property (case sensitive). */ int ofw_bus_find_string_index(phandle_t node, const char *list_name, const char *name, int *idx) { char *elems; int rv, i, cnt, nelems; elems = NULL; nelems = OF_getprop_alloc(node, list_name, 1, (void **)&elems); if (nelems <= 0) return (ENOENT); rv = ENOENT; for (i = 0, cnt = 0; i < nelems; cnt++) { if (strcmp(elems + i, name) == 0) { *idx = cnt; rv = 0; break; } i += strlen(elems + i) + 1; } if (elems != NULL) free(elems, M_OFWPROP); return (rv); } /* * Create zero terminated array of strings from string list property. */ int ofw_bus_string_list_to_array(phandle_t node, const char *list_name, const char ***out_array) { char *elems, *tptr; const char **array; int i, cnt, nelems, len; elems = NULL; nelems = OF_getprop_alloc(node, list_name, 1, (void **)&elems); if (nelems <= 0) return (nelems); /* Count number of strings. */ for (i = 0, cnt = 0; i < nelems; cnt++) i += strlen(elems + i) + 1; /* Allocate space for arrays and all strings. */ array = malloc((cnt + 1) * sizeof(char *) + nelems, M_OFWPROP, M_WAITOK); /* Get address of first string. */ tptr = (char *)(array + cnt + 1); /* Copy strings. */ memcpy(tptr, elems, nelems); free(elems, M_OFWPROP); /* Fill string pointers. */ for (i = 0, cnt = 0; i < nelems; cnt++) { len = strlen(tptr) + 1; array[cnt] = tptr; i += len; tptr += len; } array[cnt] = 0; *out_array = array; return (cnt); }