/* $NetBSD: nubus.c,v 1.65 2014/10/18 08:33:26 snj Exp $ */ /* * Copyright (c) 1995, 1996 Allen Briggs. 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 Allen Briggs. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 __KERNEL_RCSID(0, "$NetBSD: nubus.c,v 1.65 2014/10/18 08:33:26 snj Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DEBUG #define NDB_PROBE 0x1 #define NDB_FOLLOW 0x2 #define NDB_ARITH 0x4 static int nubus_debug = 0 /* | NDB_PROBE | NDB_FOLLOW | NDB_ARITH */ ; #endif static int nubus_print(void *, const char *); static int nubus_match(device_t, cfdata_t, void *); static void nubus_attach(device_t, device_t, void *); static int nubus_video_resource(int); static int nubus_probe_slot(bus_space_tag_t, bus_space_handle_t, int, nubus_slot *); static u_int32_t nubus_calc_CRC(bus_space_tag_t, bus_space_handle_t, nubus_slot *); static u_long nubus_adjust_ptr(u_int8_t, u_long, long); static u_int8_t nubus_read_1(bus_space_tag_t, bus_space_handle_t, u_int8_t, u_long); #ifdef notyet static u_int16_t nubus_read_2(bus_space_tag_t, bus_space_handle_t, u_int8_t, u_long); #endif static u_int32_t nubus_read_4(bus_space_tag_t, bus_space_handle_t, u_int8_t, u_long); CFATTACH_DECL_NEW(nubus, sizeof(struct nubus_softc), nubus_match, nubus_attach, NULL, NULL); static int nubus_match(device_t parent, cfdata_t cf, void *aux) { static int nubus_matched = 0; /* Allow only one instance. */ if (nubus_matched) return (0); nubus_matched = 1; return (1); } static void nubus_attach(device_t parent, device_t self, void *aux) { struct nubus_attach_args na_args; struct mainbus_attach_args *mba; bus_space_tag_t bst; bus_space_handle_t bsh; nubus_slot fmtblock; nubus_dir dir; nubus_dirent dirent; nubus_type slottype; u_long entry; int i, rsrcid; u_int8_t lanes; mba = aux; KASSERT(NULL != mba->mba_dmat); printf("\n"); for (i = NUBUS_MIN_SLOT; i <= NUBUS_MAX_SLOT; i++) { na_args.slot = i; na_args.na_tag = bst = mba->mba_bst; na_args.na_dmat = mba->mba_dmat; if (bus_space_map(bst, NUBUS_SLOT2PA(na_args.slot), NBMEMSIZE, 0, &bsh)) { #ifdef DEBUG if (nubus_debug & NDB_PROBE) printf("%s: failed to map slot %x, " "address %p (in use?)\n", device_xname(self), i, (void *)NUBUS_SLOT2PA(i)); #endif continue; } if (nubus_probe_slot(bst, bsh, i, &fmtblock) <= 0) { notfound: bus_space_unmap(bst, bsh, NBMEMSIZE); continue; } rsrcid = 0x80; lanes = fmtblock.bytelanes; nubus_get_main_dir(&fmtblock, &dir); /* * Get the resource for the first function on the card. * This is assumed to be at resource ID 0x80. If we can * not find this entry (as we can not on some video cards), * check to see if we can get a different ID from the list * of video resources given to us by the booter. If that * doesn't work either, take the first resource following * the board resource. * If we only find a board resource, report that. * There are cards that do not have anything else; their * driver then has to match on the board resource and * the card name. */ if (nubus_find_rsrc(bst, bsh, &fmtblock, &dir, rsrcid, &dirent) <= 0) { if ((rsrcid = nubus_video_resource(i)) == -1) { int has_board_rsrc = 0; /* * Since nubus_find_rsrc failed, the directory * is back at its base. */ entry = dir.curr_ent; /* * All nubus cards should have a board * resource, but be sure that's what it * is before we skip it, and note the fact. */ rsrcid = nubus_read_1(bst, bsh, lanes, entry); if (rsrcid == 0x1) { has_board_rsrc = 1; entry = nubus_adjust_ptr(lanes, dir.curr_ent, 4); } rsrcid = nubus_read_1(bst, bsh, lanes, entry); /* end of chain? */ if (rsrcid == 0xff) { if (!has_board_rsrc) goto notfound; else rsrcid = 0x01; } #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("\tUsing rsrc 0x%x.\n", rsrcid); #endif } /* * Try to find the resource passed by the booter * or the one we just tracked down. */ if (nubus_find_rsrc(bst, bsh, &fmtblock, &dir, rsrcid, &dirent) <= 0) goto notfound; } nubus_get_dir_from_rsrc(&fmtblock, &dirent, &dir); if (nubus_find_rsrc(bst, bsh, &fmtblock, &dir, NUBUS_RSRC_TYPE, &dirent) <= 0) goto notfound; if (nubus_get_ind_data(bst, bsh, &fmtblock, &dirent, (void *)&slottype, sizeof(nubus_type)) <= 0) goto notfound; /* * If this is a display card, try to pull out the correct * display mode as passed by the booter. */ if (slottype.category == NUBUS_CATEGORY_DISPLAY) { int r; if ((r = nubus_video_resource(i)) != -1) { nubus_get_main_dir(&fmtblock, &dir); if (nubus_find_rsrc(bst, bsh, &fmtblock, &dir, r, &dirent) <= 0) goto notfound; nubus_get_dir_from_rsrc(&fmtblock, &dirent, &dir); if (nubus_find_rsrc(bst, bsh, &fmtblock, &dir, NUBUS_RSRC_TYPE, &dirent) <= 0) goto notfound; if (nubus_get_ind_data(bst, bsh, &fmtblock, &dirent, (void *)&slottype, sizeof(nubus_type)) <= 0) goto notfound; rsrcid = r; } } na_args.slot = i; na_args.rsrcid = rsrcid; na_args.category = slottype.category; na_args.type = slottype.type; na_args.drsw = slottype.drsw; na_args.drhw = slottype.drhw; na_args.fmt = &fmtblock; bus_space_unmap(bst, bsh, NBMEMSIZE); config_found(self, &na_args, nubus_print); } enable_nubus_intr(); } static int nubus_print(void *aux, const char *pnp) { struct nubus_attach_args *na = (struct nubus_attach_args *)aux; bus_space_tag_t bst = na->na_tag; bus_space_handle_t bsh; if (pnp) { aprint_normal("%s slot %x", pnp, na->slot); if (bus_space_map(bst, NUBUS_SLOT2PA(na->slot), NBMEMSIZE, 0, &bsh) == 0) { aprint_normal(": %s", nubus_get_card_name(bst, bsh, na->fmt)); aprint_normal(" (Vendor: %s,", nubus_get_vendor(bst, bsh, na->fmt, NUBUS_RSRC_VEND_ID)); aprint_normal(" Part: %s)", nubus_get_vendor(bst, bsh, na->fmt, NUBUS_RSRC_VEND_PART)); bus_space_unmap(bst, bsh, NBMEMSIZE); } #ifdef DIAGNOSTIC else aprint_normal(":"); aprint_normal(" Type: %04x %04x %04x %04x", na->category, na->type, na->drsw, na->drhw); #endif } else { aprint_normal(" slot %x", na->slot); } return (UNCONF); } static int nubus_video_resource(int slot) { extern u_int16_t mac68k_vrsrc_vec[]; int i; for (i = 0 ; i < 6 ; i++) if ((mac68k_vrsrc_vec[i] & 0xff) == slot) return ((mac68k_vrsrc_vec[i] >> 8) & 0xff); return (-1); } /* * Probe a given nubus slot. If a card is there and we can get the * format block from its clutching decl. ROMs, fill the format block * and return non-zero. If we can't find a card there with a valid * decl. ROM, return 0. * * First, we check to see if we can access the memory at the tail * end of the slot. If so, then we check for a bytelanes byte. We * could probably just return a failure status if we bus error on * the first try, but there really is little reason not to go ahead * and check the other three locations in case there's a weird card * out there. * * Checking for a card involves locating the "bytelanes" byte which * tells us how to interpret the declaration ROM's data. The format * block is at the top of the card's standard memory space and the * bytelanes byte is at the end of that block. * * After some inspection of the bytelanes byte, it appears that it * takes the form 0xXY where Y is a bitmask of the bytelanes in use * and X is a bitmask of the lanes to ignore. Hence, (X ^ Y) == 0 * and (less obviously), Y will have the upper N bits clear if it is * found N bytes from the last possible location. Both that and * the exclusive-or check are made. * * If a valid */ static u_int8_t nbits[] = {0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4}; static int nubus_probe_slot(bus_space_tag_t bst, bus_space_handle_t bsh, int slot, nubus_slot *fmt) { u_long ofs, hdr; int i, j, found, hdr_size; u_int8_t lanes; #ifdef DEBUG if (nubus_debug & NDB_PROBE) printf("probing slot %x\n", slot); #endif /* * The idea behind this glorious work of art is to probe for only * valid bytelanes values at appropriate locations (see DC&D p. 159 * for a list). Note the pattern: the first 8 values are at offset * 0xffffff in the slot's space; the next 4 values at 0xfffffe; the * next 2 values at 0xfffffd; and the last one at 0xfffffc. * * The nested loops implement an efficient search of this space, * probing first for a valid address, then checking for each of the * valid bytelanes values at that address. */ ofs = NBMEMSIZE; lanes = 0xf; for (j = 8, found = 0; j > 0 && !found; j >>= 1) { ofs--; for (i = j; i > 0; i--, lanes--) { if (!mac68k_bus_space_probe(bst, bsh, ofs, 1)) { lanes -= i; break; } if (bus_space_read_1(bst, bsh, ofs) == (((~lanes & 0xf) << 4) | lanes)) { found = 1; break; } } } if (!found) { #ifdef DEBUG if (nubus_debug & NDB_PROBE) printf("bytelanes not found for slot %x\n", slot); #endif return 0; } fmt->bytelanes = lanes; fmt->step = nbits[(lanes & 0x0f)]; fmt->slot = slot; /* XXX redundant; get rid of this someday */ #ifdef DEBUG if (nubus_debug & NDB_PROBE) printf("bytelanes of 0x%x found for slot 0x%x.\n", fmt->bytelanes, slot); #endif /* * Go ahead and attempt to load format header. * First, we need to find the first byte beyond memory that * would be valid. This is necessary for NUBUS_ROM_offset() * to work. */ hdr = NBMEMSIZE; hdr_size = 20; i = 0x10 | (lanes & 0x0f); while ((i & 1) == 0) { hdr++; i >>= 1; } fmt->top = hdr; hdr = nubus_adjust_ptr(lanes, hdr, -hdr_size); #ifdef DEBUG if (nubus_debug & NDB_PROBE) printf("fmt->top is 0x%lx, that minus 0x%x puts us at 0x%lx.\n", fmt->top, hdr_size, hdr); if (nubus_debug & NDB_ARITH) for (i = 1 ; i < 8 ; i++) printf("0x%lx - 0x%x = 0x%lx, + 0x%x = 0x%lx.\n", hdr, i, nubus_adjust_ptr(lanes, hdr, -i), i, nubus_adjust_ptr(lanes, hdr, i)); #endif fmt->directory_offset = 0xff000000 | nubus_read_4(bst, bsh, lanes, hdr); hdr = nubus_adjust_ptr(lanes, hdr, 4); fmt->length = nubus_read_4(bst, bsh, lanes, hdr); hdr = nubus_adjust_ptr(lanes, hdr, 4); fmt->crc = nubus_read_4(bst, bsh, lanes, hdr); hdr = nubus_adjust_ptr(lanes, hdr, 4); fmt->revision_level = nubus_read_1(bst, bsh, lanes, hdr); hdr = nubus_adjust_ptr(lanes, hdr, 1); fmt->format = nubus_read_1(bst, bsh, lanes, hdr); hdr = nubus_adjust_ptr(lanes, hdr, 1); fmt->test_pattern = nubus_read_4(bst, bsh, lanes, hdr); #ifdef DEBUG if (nubus_debug & NDB_PROBE) { printf("Directory offset 0x%x\t", fmt->directory_offset); printf("Length 0x%x\t", fmt->length); printf("CRC 0x%x\n", fmt->crc); printf("Revision level 0x%x\t", fmt->revision_level); printf("Format 0x%x\t", fmt->format); printf("Test Pattern 0x%x\n", fmt->test_pattern); } #endif if ((fmt->directory_offset & 0x00ff0000) == 0) { printf("Invalid looking directory offset (0x%x)!\n", fmt->directory_offset); return 0; } if (fmt->test_pattern != NUBUS_ROM_TEST_PATTERN) { printf("Nubus--test pattern invalid:\n"); printf(" slot 0x%x, bytelanes 0x%x?\n", fmt->slot, lanes); printf(" read test 0x%x, compare with 0x%x.\n", fmt->test_pattern, NUBUS_ROM_TEST_PATTERN); return 0; } /* Perform CRC */ if (fmt->crc != nubus_calc_CRC(bst, bsh, fmt)) { printf("Nubus--crc check failed, slot 0x%x.\n", fmt->slot); return 0; } return 1; } static u_int32_t nubus_calc_CRC(bus_space_tag_t bst, bus_space_handle_t bsh, nubus_slot *fmt) { #if 0 u_long base, ptr, crc_loc; u_int32_t sum; u_int8_t lanes = fmt->bytelanes; base = fmt->top; crc_loc = NUBUS_ROM_offset(fmt, base, -12); ptr = NUBUS_ROM_offset(fmt, base, -fmt->length); sum = 0; while (ptr < base) roll #1, sum if (ptr == crc_loc) { roll #3, sum ptr = nubus_adjust_ptr(lanes, ptr, 3); } else { sum += nubus_read_1(bst, bsh, lanes, ptr); } ptr = nubus_adjust_ptr(lanes, ptr, 1); } return sum; #endif return fmt->crc; } /* * Compute byte offset on card, taking into account bytelanes. * Base must be on a valid bytelane for this function to work. * Return the new address. * * XXX -- There has GOT to be a better way to do this. */ static u_long nubus_adjust_ptr(u_int8_t lanes, u_long base, long amt) { u_int8_t b, t; if (!amt) return base; if (amt < 0) { amt = -amt; b = lanes; t = (b << 4); b <<= (3 - (base & 0x3)); while (amt) { b <<= 1; if (b == t) b = lanes; if (b & 0x08) amt--; base--; } return base; } t = (lanes & 0xf) | 0x10; b = t >> (base & 0x3); while (amt) { b >>= 1; if (b == 1) b = t; if (b & 1) amt--; base++; } return base; } static u_int8_t nubus_read_1(bus_space_tag_t bst, bus_space_handle_t bsh, u_int8_t lanes, u_long ofs) { return bus_space_read_1(bst, bsh, ofs); } #ifdef notyet /* Nothing uses this, yet */ static u_int16_t nubus_read_2(bus_space_tag_t bst, bus_space_handle_t bsh, u_int8_t lanes, u_long ofs) { u_int16_t s; s = (nubus_read_1(bst, bsh, lanes, ofs) << 8); ofs = nubus_adjust_ptr(lanes, ofs, 1); s |= nubus_read_1(bst, bsh, lanes, ofs); return s; } #endif static u_int32_t nubus_read_4(bus_space_tag_t bst, bus_space_handle_t bsh, u_int8_t lanes, u_long ofs) { u_int32_t l; int i; l = 0; for (i = 0; i < 4; i++) { l = (l << 8) | nubus_read_1(bst, bsh, lanes, ofs); ofs = nubus_adjust_ptr(lanes, ofs, 1); } return l; } void nubus_get_main_dir(nubus_slot *fmt, nubus_dir *dir_return) { #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_main_dir(%p, %p)\n", fmt, dir_return); #endif dir_return->dirbase = nubus_adjust_ptr(fmt->bytelanes, fmt->top, fmt->directory_offset - 20); dir_return->curr_ent = dir_return->dirbase; } void nubus_get_dir_from_rsrc(nubus_slot *fmt, nubus_dirent *dirent, nubus_dir *dir_return) { u_long loc; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_dir_from_rsrc(%p, %p, %p).\n", fmt, dirent, dir_return); #endif if ((loc = dirent->offset) & 0x800000) { loc |= 0xff000000; } dir_return->dirbase = nubus_adjust_ptr(fmt->bytelanes, dirent->myloc, loc); dir_return->curr_ent = dir_return->dirbase; } int nubus_find_rsrc(bus_space_tag_t bst, bus_space_handle_t bsh, nubus_slot *fmt, nubus_dir *dir, u_int8_t rsrcid, nubus_dirent *dirent_return) { u_long entry; u_int8_t byte, lanes = fmt->bytelanes; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_find_rsrc(%p, %p, 0x%x, %p)\n", fmt, dir, rsrcid, dirent_return); #endif if (fmt->test_pattern != NUBUS_ROM_TEST_PATTERN) return -1; entry = dir->curr_ent; do { byte = nubus_read_1(bst, bsh, lanes, entry); #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("\tFound rsrc 0x%x.\n", byte); #endif if (byte == rsrcid) { dirent_return->myloc = entry; dirent_return->rsrc_id = rsrcid; entry = nubus_read_4(bst, bsh, lanes, entry); dirent_return->offset = (entry & 0x00ffffff); return 1; } if (byte == 0xff) { entry = dir->dirbase; } else { entry = nubus_adjust_ptr(lanes, entry, 4); } } while (entry != (u_long)dir->curr_ent); return 0; } int nubus_get_ind_data(bus_space_tag_t bst, bus_space_handle_t bsh, nubus_slot *fmt, nubus_dirent *dirent, char *data_return, int nbytes) { u_long loc; u_int8_t lanes = fmt->bytelanes; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_ind_data(%p, %p, %p, %d).\n", fmt, dirent, data_return, nbytes); #endif if ((loc = dirent->offset) & 0x800000) { loc |= 0xff000000; } loc = nubus_adjust_ptr(lanes, dirent->myloc, loc); while (nbytes--) { *data_return++ = nubus_read_1(bst, bsh, lanes, loc); loc = nubus_adjust_ptr(lanes, loc, 1); } return 1; } int nubus_get_c_string(bus_space_tag_t bst, bus_space_handle_t bsh, nubus_slot *fmt, nubus_dirent *dirent, char *data_return, int max_bytes) { u_long loc; u_int8_t lanes = fmt->bytelanes; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_c_string(%p, %p, %p, %d).\n", fmt, dirent, data_return, max_bytes); #endif if ((loc = dirent->offset) & 0x800000) loc |= 0xff000000; loc = nubus_adjust_ptr(lanes, dirent->myloc, loc); *data_return = '\0'; while (max_bytes--) { if ((*data_return++ = nubus_read_1(bst, bsh, lanes, loc)) == 0) return 1; loc = nubus_adjust_ptr(lanes, loc, 1); } *(data_return-1) = '\0'; return 0; } /* * Get list of address ranges for an sMemory resource * -> DC&D, p.171 */ int nubus_get_smem_addr_rangelist(bus_space_tag_t bst, bus_space_handle_t bsh, nubus_slot *fmt, nubus_dirent *dirent, void *data_return) { u_long loc; u_int8_t lanes = fmt->bytelanes; long blocklen; void *blocklist; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_smem_addr_rangelist(%p, %p, %p).\n", fmt, dirent, data_return); #endif if ((loc = dirent->offset) & 0x800000) { loc |= 0xff000000; } loc = nubus_adjust_ptr(lanes, dirent->myloc, loc); /* Obtain the block length from the head of the list */ blocklen = nubus_read_4(bst, bsh, lanes, loc); /* * malloc a block of (blocklen) bytes * caller must recycle block after use */ blocklist = malloc(blocklen,M_TEMP,M_WAITOK); /* read ((blocklen - 4) / 8) (length,offset) pairs into block */ nubus_get_ind_data(bst, bsh, fmt, dirent, blocklist, blocklen); #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) { int ii; nubus_smem_rangelist *rlist; rlist = (nubus_smem_rangelist *)blocklist; printf("\tblock@%p, len 0x0%X\n", rlist, rlist->length); for (ii=0; ii < ((blocklen - 4) / 8); ii++) { printf("\tRange %d: base addr 0x%X [0x%X]\n", ii, rlist->range[ii].offset, rlist->range[ii].length); } } #endif *(void **)data_return = blocklist; return 1; } static const char *huh = "???"; const char * nubus_get_vendor(bus_space_tag_t bst, bus_space_handle_t bsh, nubus_slot *fmt, int rsrc) { static char str_ret[64]; nubus_dir dir; nubus_dirent ent; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_vendor(%p, 0x%x).\n", fmt, rsrc); #endif nubus_get_main_dir(fmt, &dir); if (nubus_find_rsrc(bst, bsh, fmt, &dir, 1, &ent) <= 0) return huh; nubus_get_dir_from_rsrc(fmt, &ent, &dir); if (nubus_find_rsrc(bst, bsh, fmt, &dir, NUBUS_RSRC_VENDORINFO, &ent) <= 0) return huh; nubus_get_dir_from_rsrc(fmt, &ent, &dir); if (nubus_find_rsrc(bst, bsh, fmt, &dir, rsrc, &ent) <= 0) return huh; nubus_get_c_string(bst, bsh, fmt, &ent, str_ret, 64); return str_ret; } const char * nubus_get_card_name(bus_space_tag_t bst, bus_space_handle_t bsh, nubus_slot *fmt) { static char name_ret[64]; nubus_dir dir; nubus_dirent ent; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_card_name(%p).\n", fmt); #endif nubus_get_main_dir(fmt, &dir); if (nubus_find_rsrc(bst, bsh, fmt, &dir, 1, &ent) <= 0) return huh; nubus_get_dir_from_rsrc(fmt, &ent, &dir); if (nubus_find_rsrc(bst, bsh, fmt, &dir, NUBUS_RSRC_NAME, &ent) <= 0) return huh; nubus_get_c_string(bst, bsh, fmt, &ent, name_ret, 64); return name_ret; } #ifdef DEBUG void nubus_scan_slot(bus_space_tag_t bst, int slotno) { int i=0, state=0; char twirl[] = "-\\|/"; bus_space_handle_t sc_bsh; if (bus_space_map(bst, NUBUS_SLOT2PA(slotno), NBMEMSIZE, 0, &sc_bsh)) { printf("nubus_scan_slot: failed to map slot %x\n", slotno); return; } printf("Scanning slot %c for accessible regions:\n", slotno == 9 ? '9' : slotno - 10 + 'A'); for (i=0 ; i