1 /* $NetBSD: mkdevsw.c,v 1.6 2008/04/28 20:24:12 martin Exp $ */ 2 3 /* 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by MAEKAWA Masahide (gehenna@NetBSD.org). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #if HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #endif 35 36 #include <stdio.h> 37 #include <string.h> 38 #include <errno.h> 39 #include <err.h> 40 41 #include "defs.h" 42 43 static void emitconv(FILE *); 44 static void emitdev(FILE *); 45 static void emitdevm(FILE *); 46 static void emitheader(FILE *); 47 48 int 49 mkdevsw(void) 50 { 51 FILE *fp; 52 53 if ((fp = fopen("devsw.c.tmp", "w")) == NULL) { 54 warn("cannot create devsw.c"); 55 return (1); 56 } 57 58 emitheader(fp); 59 emitdevm(fp); 60 emitconv(fp); 61 emitdev(fp); 62 63 fflush(fp); 64 if (ferror(fp)) { 65 warn("error writing devsw.c"); 66 fclose(fp); 67 return 1; 68 } 69 70 (void)fclose(fp); 71 72 if (moveifchanged("devsw.c.tmp", "devsw.c") != 0) { 73 warn("error renaming devsw.c"); 74 return (1); 75 } 76 77 return (0); 78 } 79 80 static void 81 emitheader(FILE *fp) 82 { 83 autogen_comment(fp, "devsw.c"); 84 85 fputs("#include <sys/param.h>\n" 86 "#include <sys/conf.h>\n" 87 "\n#define\tDEVSW_ARRAY_SIZE(x)\t" 88 "(sizeof((x))/sizeof((x)[0]))\n", fp); 89 } 90 91 /* 92 * Emit device switch table for character/block device. 93 */ 94 static void 95 emitdevm(FILE *fp) 96 { 97 struct devm *dm; 98 char mstr[16]; 99 int i; 100 101 fputs("\n/* device switch table for block device */\n", fp); 102 103 for (i = 0 ; i <= maxbdevm ; i++) { 104 (void)snprintf(mstr, sizeof(mstr), "%d", i); 105 if ((dm = ht_lookup(bdevmtab, intern(mstr))) == NULL) 106 continue; 107 108 fprintf(fp, "extern const struct bdevsw %s_bdevsw;\n", 109 dm->dm_name); 110 } 111 112 fputs("\nconst struct bdevsw *bdevsw0[] = {\n", fp); 113 114 for (i = 0 ; i <= maxbdevm ; i++) { 115 (void)snprintf(mstr, sizeof(mstr), "%d", i); 116 if ((dm = ht_lookup(bdevmtab, intern(mstr))) == NULL) { 117 fprintf(fp, "\tNULL,\n"); 118 } else { 119 fprintf(fp, "\t&%s_bdevsw,\n", dm->dm_name); 120 } 121 } 122 123 fputs("};\n\nconst struct bdevsw **bdevsw = bdevsw0;\n", fp); 124 125 fputs("const int sys_bdevsws = DEVSW_ARRAY_SIZE(bdevsw0);\n" 126 "int max_bdevsws = DEVSW_ARRAY_SIZE(bdevsw0);\n", fp); 127 128 fputs("\n/* device switch table for character device */\n", fp); 129 130 for (i = 0 ; i <= maxcdevm ; i++) { 131 (void)snprintf(mstr, sizeof(mstr), "%d", i); 132 if ((dm = ht_lookup(cdevmtab, intern(mstr))) == NULL) 133 continue; 134 135 fprintf(fp, "extern const struct cdevsw %s_cdevsw;\n", 136 dm->dm_name); 137 } 138 139 fputs("\nconst struct cdevsw *cdevsw0[] = {\n", fp); 140 141 for (i = 0 ; i <= maxcdevm ; i++) { 142 (void)snprintf(mstr, sizeof(mstr), "%d", i); 143 if ((dm = ht_lookup(cdevmtab, intern(mstr))) == NULL) { 144 fprintf(fp, "\tNULL,\n"); 145 } else { 146 fprintf(fp, "\t&%s_cdevsw,\n", dm->dm_name); 147 } 148 } 149 150 fputs("};\n\nconst struct cdevsw **cdevsw = cdevsw0;\n", fp); 151 152 fputs("const int sys_cdevsws = DEVSW_ARRAY_SIZE(cdevsw0);\n" 153 "int max_cdevsws = DEVSW_ARRAY_SIZE(cdevsw0);\n", fp); 154 } 155 156 /* 157 * Emit device major conversion table. 158 */ 159 static void 160 emitconv(FILE *fp) 161 { 162 struct devm *dm; 163 164 fputs("\n/* device conversion table */\n" 165 "struct devsw_conv devsw_conv0[] = {\n", fp); 166 TAILQ_FOREACH(dm, &alldevms, dm_next) { 167 fprintf(fp, "\t{ \"%s\", %d, %d },\n", dm->dm_name, 168 dm->dm_bmajor, dm->dm_cmajor); 169 } 170 fputs("};\n\n" 171 "struct devsw_conv *devsw_conv = devsw_conv0;\n" 172 "int max_devsw_convs = DEVSW_ARRAY_SIZE(devsw_conv0);\n", 173 fp); 174 } 175 176 /* 177 * Emit specific device major informations. 178 */ 179 static void 180 emitdev(FILE *fp) 181 { 182 struct devm *dm; 183 char mstr[16]; 184 185 fputs("\n", fp); 186 187 (void)strlcpy(mstr, "swap", sizeof(mstr)); 188 if ((dm = ht_lookup(bdevmtab, intern(mstr))) != NULL) { 189 fprintf(fp, "const dev_t swapdev = makedev(%d, 0);\n", 190 dm->dm_bmajor); 191 } 192 193 (void)strlcpy(mstr, "mem", sizeof(mstr)); 194 if ((dm = ht_lookup(cdevmtab, intern(mstr))) == NULL) 195 panic("memory device is not configured"); 196 fprintf(fp, "const dev_t zerodev = makedev(%d, DEV_ZERO);\n", 197 dm->dm_cmajor); 198 199 fputs("\n/* mem_no is only used in iskmemdev() */\n", fp); 200 fprintf(fp, "const int mem_no = %d;\n", dm->dm_cmajor); 201 } 202