Mercurial > hg > Members > kono > os9 > sbc09
annotate os9/makerom.c @ 15:bb6a2a9f59f1
boot ...
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Sat, 07 Jul 2018 19:57:39 +0900 |
| parents | 111e5defb8ab |
| children | 67046a9431a0 |
| rev | line source |
|---|---|
| 0 | 1 /* makerom.c |
| 2 build ROM image file os9.rom from module list | |
| 11 | 3 |
| 4 Shinji KONO Fri Jul 6 13:31:52 JST 2018 | |
| 5 | |
| 0 | 6 */ |
| 7 | |
| 8 #include <stdio.h> | |
| 9 #include <stdlib.h> | |
| 10 #include <strings.h> | |
| 11 #include <sys/stat.h> | |
| 12 | |
| 11 | 13 // #define DEBUG 1 |
| 14 | |
| 15 /* | |
| 16 * Level1 | |
| 17 * os9p1 should be 0xf800 | |
| 18 * it searches ram from the beginning | |
| 19 * rom modules are searched from just after the end of RAM | |
| 20 * | |
| 21 * Level2 | |
| 22 * Coco 512kb memory space | |
| 23 * last 8k is a ROM (can be switched?) ( block 0x3f ) | |
| 24 * os9p1 search module on 0x0d00~0x1e00 at block 0x3f | |
| 25 * | |
| 26 * 8k block ( offset 0xc000 ) | |
| 27 * | |
| 28 * 0xe000 - 0xccff 0xff | |
|
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29 * 0xed00 - 0xfeff os9 modules, os9p1 should be the last |
| 11 | 30 * MMU doesnot touch below |
| 31 * 0xff80 - 0xffdf IO port ( ACIA, clock, pdisk, MMU ) | |
| 32 * 0xffd0 - 0xffef boot code | |
| 33 * 0xfff0 - 0xffff intr vector | |
| 34 * ... next few blocks as extended ROM | |
| 35 * | |
| 36 */ | |
| 37 | |
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38 int level = 1; |
| 6 | 39 int IOBASE = 0xe000; |
| 40 int IOSIZE = 0x100; | |
| 41 char * outfile ; | |
| 0 | 42 |
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43 #define LV2START 0xffd0 // our own small boot for mmu |
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44 #define LV2ROMEND 0xff00 |
| 9 | 45 |
| 8 | 46 // #define DEBUG |
| 47 | |
| 0 | 48 typedef struct os9module { |
| 49 int size; | |
| 50 int location; | |
| 51 int ioflag; | |
| 52 unsigned char *mod; | |
| 53 char *name; | |
| 54 struct os9module *next; | |
| 55 } *MPTR ; | |
| 56 | |
| 57 struct os9module * | |
| 58 readOS9module(char *filename) | |
| 59 { | |
| 60 FILE *fp = fopen(filename,"rb"); | |
| 61 if (fp==0) { | |
| 62 fprintf(stderr,"cannot read %s\n",filename); | |
| 63 exit(1); | |
| 64 } | |
| 65 struct stat st; | |
| 66 fstat(fileno(fp),&st); | |
| 67 int size = st.st_size; | |
| 68 struct os9module *m = malloc(size + sizeof(struct os9module)); | |
| 69 m->size = size; | |
| 70 m->next = 0; | |
| 71 m->ioflag = 0; | |
| 72 m->mod = (unsigned char*)m + sizeof(struct os9module); | |
| 73 fread(m->mod , size, 1, fp); | |
| 74 m->name = (char*) (m->mod + (m->mod[4]*256 + m->mod[5]) ); | |
| 75 fclose(fp); | |
| 76 return m; | |
| 77 } | |
| 78 | |
| 79 void | |
| 80 fputword(unsigned short x, FILE *fp) | |
| 81 { | |
| 82 fputc((x>>8)&0xff,fp); | |
| 83 fputc(x&0xff,fp); | |
| 84 } | |
| 85 | |
| 86 void printOs9Str(char *p) | |
| 87 { | |
| 88 while((*p & 0x80)==0) { | |
| 89 putchar(*p); | |
| 90 p++; | |
| 91 } | |
| 92 putchar(*p & 0x7f); | |
| 93 } | |
| 94 | |
| 10 | 95 unsigned short |
| 96 getword(unsigned char *ptr) | |
| 97 { | |
| 98 return (ptr[0]<<8)+ptr[1]; | |
| 99 } | |
| 100 | |
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101 void rewrite_vector(MPTR m,int size, unsigned char *adr,int count) |
| 10 | 102 { |
| 103 // vector is a offset from $F100 (possibly os9p1 module address) | |
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104 int offset = -size-0xf100; |
| 10 | 105 for(int i=0;i<count;i++) { |
| 106 int vec = getword(adr); | |
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107 vec += offset; |
| 10 | 108 adr[0] = vec>>8; |
| 109 adr[1] = vec&0xff; | |
| 110 adr += 2; | |
| 111 } | |
| 112 } | |
| 113 | |
| 1 | 114 // calcurate position from the botton |
| 115 // avoid v09 IO map on 0xe000-0xe800 | |
| 116 // os9p1 have to be last and at 0xf800 | |
| 0 | 117 int findLocation(MPTR m, int loc) { |
| 118 if (m==0) return loc; | |
| 119 int top = findLocation(m->next, loc) - m->size; | |
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120 if (m->next==0) { |
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121 if (level == 1) |
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122 top = 0xf800; // OS9p1 |
| 10 | 123 else { |
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124 top = 0x10000-(m->size+0x100); |
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125 rewrite_vector(m,m->size,m->mod+getword(m->mod+2),7); |
| 10 | 126 } |
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127 } |
| 8 | 128 if (level==1 && !(( top+m->size < IOBASE ) || ( IOBASE+IOSIZE < top)) ) { |
| 0 | 129 top = IOBASE-m->size-1; |
| 130 m->ioflag = 1; | |
| 8 | 131 #ifdef DEBUG |
| 132 printf("*"); | |
| 133 #endif | |
| 11 | 134 } else if (level==2 && 0xed00 > top) { |
| 135 m->ioflag = 1; | |
| 0 | 136 } |
| 137 m->location = top; | |
| 8 | 138 #ifdef DEBUG |
| 139 printf("mod "); | |
| 140 printOs9Str(m->name); | |
| 141 printf(" \t: 0x%x - 0x%x\n",top, top + m->size); | |
| 142 #endif | |
| 0 | 143 return top; |
| 144 } | |
| 145 | |
| 146 int | |
| 147 main(int ac, char *av[]) | |
| 148 { | |
| 149 int vectable = 0; | |
| 150 struct os9module *m = 0, root ; | |
| 151 root.size = 0; | |
| 152 root.mod = 0; | |
| 153 m = &root; | |
| 154 | |
| 6 | 155 for(int i = 1 ; i<ac ; i++ ) { |
| 156 if (*av[i]=='-') { | |
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157 if (av[i][1] =='2') { // for level 2 |
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158 level = 2; |
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159 IOBASE = LV2ROMEND; |
| 6 | 160 } else if (av[i][1] =='o') { |
| 161 outfile = av[i+1]; | |
| 162 i += 1; | |
| 163 } else { | |
| 164 return 1; | |
| 165 } | |
| 166 continue; | |
| 167 } | |
| 0 | 168 struct os9module *cur; |
| 169 cur = readOS9module(av[i]); | |
| 170 m->next = cur; | |
| 171 m = cur; | |
| 172 } | |
| 173 | |
| 174 FILE *romfile; | |
| 175 unsigned pos; | |
| 6 | 176 if (outfile==0) return 1; |
| 0 | 177 |
| 6 | 178 romfile=fopen(outfile,"wb"); |
| 0 | 179 if(!romfile) { |
| 180 fprintf(stderr,"Cannot create file %s\n",av[1]); | |
| 181 exit(1); | |
| 182 } | |
| 183 | |
| 184 | |
| 185 int start = findLocation(root.next,0); | |
| 186 start = start&0xf800; | |
| 187 printf("\n\n"); | |
| 188 | |
| 11 | 189 if (level==2) { |
| 190 for(int i=0; i<0xd00; i++) fputc(0xff,romfile); | |
| 191 pos = 0xed00; | |
| 192 } else { | |
| 193 pos = start; | |
| 194 } | |
| 8 | 195 struct os9module *os9p1 = 0; |
| 0 | 196 for(struct os9module *cur = root.next; cur ; cur = cur->next ) { |
| 11 | 197 if ( level==2 && cur->ioflag ==1) continue; |
| 6 | 198 // last module have to os9p1 |
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199 if ( cur->next == 0 ) { |
| 8 | 200 os9p1 = cur; |
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201 if ( level==1 ) { |
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202 for(; pos < 0xf800 ; pos++) { // os9p1 begins at 0xf800 |
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203 fputc(0xff,romfile); |
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204 } |
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205 } else { |
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206 int pend = 0x10000-( cur->size +0x100); |
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207 for(; pos < pend ; pos++) { // os9p1 ends 0xfeff |
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208 fputc(0xff,romfile); |
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209 } |
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210 } |
| 0 | 211 } |
| 212 printf("mod "); | |
| 213 printOs9Str(cur->name); | |
| 214 fwrite(cur->mod, cur->size, 1, romfile); | |
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215 printf(" \t: 0x%x - 0x%x\n",pos, pos + cur->size-1); |
| 8 | 216 #ifdef DEBUG |
| 217 printf(" \t: 0x%x \n",cur->location); | |
| 218 printf(" \t: 0x%x - 0x%x : 0x%lx \n",pos, pos + cur->size, ftell(romfile)+start); | |
| 219 #endif | |
| 0 | 220 pos = pos+cur->size; |
| 11 | 221 if (level==1 && cur->ioflag) { |
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222 if (level==1) { |
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223 for(; pos < IOBASE + IOSIZE; pos++) { |
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224 fputc(0xff,romfile); |
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225 } |
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226 printf("*"); |
| 8 | 227 } |
| 0 | 228 } |
| 229 } | |
| 230 printf("os9 end %x\n",pos); | |
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231 if (level==1) { |
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232 vectable = 0x10000 - 2*7; |
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233 for( ; pos<vectable; pos++) fputc(0xff,romfile); |
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234 printf("vectbl %x\n",pos); |
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235 fputword(0xF82d,romfile); |
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236 fputword(0xF831,romfile); |
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237 fputword(0xF835,romfile); |
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238 fputword(0xF839,romfile); |
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239 fputword(0xF83d,romfile); |
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240 fputword(0xF841,romfile); |
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241 fputword(0xF876,romfile); |
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242 } else { |
| 8 | 243 char vector[] = "level2/vector"; |
| 244 FILE *fp = fopen(vector,"rb"); | |
| 245 if (fp==0) { | |
| 246 fprintf(stderr,"cannot read %s\n",vector); | |
| 247 exit(1); | |
| 248 } | |
| 9 | 249 for( ; pos<LV2START; pos++) fputc(0xff,romfile); |
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250 printf("vectbl %x\n",pos); |
| 8 | 251 for( ; pos<0xfff0; pos++) fputc(fgetc(fp),romfile); |
| 252 | |
| 253 #ifdef DEBUG | |
| 254 printf("os9entry %x\n",os9p1->location); | |
| 255 #endif | |
| 256 printf("os9entry %x\n",os9p1->location+getword(os9p1->mod+9)); | |
| 257 | |
| 258 fputword(os9p1->location+getword(os9p1->mod+9),romfile); // os9p1 entry point | |
| 11 | 259 unsigned short vec = os9p1->location+os9p1->size - 18; |
| 8 | 260 fputword(vec,romfile); |
| 261 fputword(vec+3,romfile); | |
| 262 fputword(vec+6,romfile); | |
| 263 | |
| 264 fputword(vec+9,romfile); | |
| 265 fputword(vec+12,romfile); | |
| 266 fputword(vec+15,romfile); | |
| 9 | 267 fputword(LV2START,romfile); |
| 11 | 268 |
| 269 pos = 0x10000; | |
| 15 | 270 int bootsize = 2; |
| 271 for(struct os9module *cur = root.next; cur ; cur = cur->next ) { | |
| 272 if ( cur->ioflag ==0) continue; | |
| 273 bootsize += cur->size; | |
| 274 } | |
| 275 fputc(bootsize>>8,romfile); | |
| 276 fputc(bootsize&0xff,romfile); | |
| 277 pos += 2; | |
| 11 | 278 for(struct os9module *cur = root.next; cur ; cur = cur->next ) { |
| 279 if ( cur->ioflag ==0) continue; | |
| 280 printf("mod "); | |
| 281 printOs9Str(cur->name); | |
| 282 fwrite(cur->mod, cur->size, 1, romfile); | |
| 283 printf(" \t: 0x%x - 0x%x\n",pos, pos + cur->size-1); | |
| 284 #ifdef DEBUG | |
| 285 printf(" \t: 0x%x \n",cur->location); | |
| 286 printf(" \t: 0x%x - 0x%x : 0x%lx \n",pos, pos + cur->size, ftell(romfile)+start); | |
| 287 #endif | |
| 15 | 288 pos += cur->size; |
| 11 | 289 } |
| 290 while(pos++ & 0x1fff) fputc(0xff,romfile); | |
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291 } |
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292 if (level==1) |
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293 printf("boot rom from 0x%lx\n",0x10000-ftell(romfile)); |
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294 else |
| 11 | 295 printf("boot rom from 0xc000 size 0x%lx\n",ftell(romfile)); |
| 0 | 296 fclose(romfile); |
| 297 return 0; | |
| 298 } | |
| 11 | 299 |
| 300 |