Mercurial > lcfOS
annotate cos/kernel/handlers.c @ 20:b1fed2171e1a
Now working with 2 MB pages
| author | windel |
|---|---|
| date | Mon, 28 Nov 2011 20:54:40 +0100 |
| parents | 6129643f5c34 |
| children | 66e9c332c845 |
| rev | line source |
|---|---|
| 14 | 1 #include "kernel.h" |
| 2 | |
| 3 void panic(char *msg) { | |
| 4 printf("Kernel panic: "); | |
| 5 printf(msg); | |
|
18
6129643f5c34
Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents:
17
diff
changeset
|
6 magicBochsBreak(); |
| 14 | 7 halt(); |
| 8 } | |
| 9 | |
| 10 // Assembler wrapper prototypes: | |
| 11 void INTDEF(void); | |
| 12 void INT0(void); | |
| 13 void INT1(void); | |
| 14 void INT2(void); | |
| 15 void INT3(void); | |
| 16 void INT4(void); | |
| 17 void INT5(void); | |
| 18 void INT6(void); | |
| 19 void INT7(void); | |
| 20 void INT8(void); | |
| 21 void INT9(void); | |
| 22 void INT10(void); | |
| 23 void INT11(void); | |
| 24 void INT12(void); | |
| 25 void INT13(void); | |
| 26 void INT14(void); | |
| 27 void INT15(void); | |
| 28 void INT16(void); | |
| 29 void INT17(void); | |
| 30 void INT18(void); | |
| 31 void INT19(void); | |
| 32 // Remapped handlers: | |
| 33 void INT32(void); | |
| 34 void INT33(void); | |
| 35 void INT34(void); | |
| 36 | |
| 37 // THE interrupt descriptor table: | |
| 20 | 38 IDT_entry *idt = (IDT_entry*)0x0; |
| 17 | 39 volatile idtPointer idtP; |
| 14 | 40 |
| 17 | 41 void setIDTentry(int num, void (*handler)(), uint16_t selector, uint8_t flags) |
| 14 | 42 { |
| 43 // Fill one entry with IDT info: | |
| 44 uint64_t offset; | |
| 45 | |
| 17 | 46 // Typecast the function pointer to a number: |
| 47 offset = (uint64_t)handler; | |
| 14 | 48 |
| 17 | 49 // Set offset: |
| 50 idt[num].baseLow = offset & 0xFFFF; | |
| 51 idt[num].baseMid = (offset >> 16) & 0xFFFF; | |
| 52 idt[num].baseHigh = (offset >> 32) & 0xFFFFFFFF; | |
| 53 | |
| 54 // Set flags and selector: | |
| 55 idt[num].selector = selector; | |
| 56 idt[num].flags = flags; | |
| 57 | |
| 58 // Set reserved fields: | |
| 59 idt[num].reserved1 = 0; | |
| 60 idt[num].reserved2 = 0; | |
| 14 | 61 } |
| 62 | |
| 63 void setupIDT(void) { | |
| 64 int i; | |
| 65 // Fill all vectors with the default handler: | |
| 66 for (i=0; i<256; i++) { | |
| 17 | 67 setIDTentry(i, &INTDEF, 0x08, 0x8E); |
| 14 | 68 } |
| 69 | |
| 70 // Now set other then default handler: | |
| 17 | 71 setIDTentry(0, INT0, 0x08, 0x8E); |
| 72 setIDTentry(1, INT1, 0x08, 0x8E); | |
| 73 setIDTentry(2, INT2, 0x08, 0x8E); | |
| 74 setIDTentry(3, INT3, 0x08, 0x8E); | |
| 75 setIDTentry(4, INT4, 0x08, 0x8E); | |
| 76 setIDTentry(5, INT5, 0x08, 0x8E); | |
| 77 setIDTentry(6, INT6, 0x08, 0x8E); | |
| 78 setIDTentry(7, INT7, 0x08, 0x8E); | |
| 79 setIDTentry(8, INT8, 0x08, 0x8E); | |
| 80 setIDTentry(9, INT9, 0x08, 0x8E); | |
| 81 setIDTentry(10, INT10, 0x08, 0x8E); | |
| 82 setIDTentry(11, INT11, 0x08, 0x8E); | |
| 83 setIDTentry(12, INT12, 0x08, 0x8E); | |
| 84 setIDTentry(13, INT13, 0x08, 0x8E); | |
| 85 setIDTentry(14, INT14, 0x08, 0x8E); | |
| 86 setIDTentry(15, INT15, 0x08, 0x8E); | |
| 87 setIDTentry(16, INT16, 0x08, 0x8E); | |
| 88 setIDTentry(17, INT17, 0x08, 0x8E); | |
| 89 setIDTentry(18, INT18, 0x08, 0x8E); | |
| 90 setIDTentry(19, INT19, 0x08, 0x8E); | |
| 14 | 91 /* reserved interrupts: */ |
| 92 // From int20 - int31 | |
|
18
6129643f5c34
Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents:
17
diff
changeset
|
93 setIDTentry(32, INT32, 0x08, 0x8F); |
|
6129643f5c34
Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents:
17
diff
changeset
|
94 setIDTentry(33, INT33, 0x08, 0x8F); |
|
6129643f5c34
Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents:
17
diff
changeset
|
95 setIDTentry(34, INT34, 0x08, 0x8F); |
| 14 | 96 |
| 17 | 97 // Set the correct values in the IDT pointer: |
| 98 idtP.base = (uint64_t)&idt; | |
| 99 idtP.limit = (sizeof(IDT_entry) * 256) - 1; | |
| 14 | 100 // call load IDT asm function: |
| 17 | 101 loadIDT(); |
| 14 | 102 |
| 103 PICremap(); | |
|
18
6129643f5c34
Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents:
17
diff
changeset
|
104 magicBochsBreak(); |
| 17 | 105 printf("enable ints\n"); |
| 106 asm("sti"); | |
| 107 printf("Done!\n"); | |
| 14 | 108 } |
| 109 | |
| 110 // PIC functions: | |
| 111 void PICremap() { | |
| 112 unsigned char maskmaster, maskslave, pic1, pic2; | |
| 113 pic1 = 0x20; // remapping location master | |
| 114 pic2 = 0x28; | |
| 115 maskmaster = inb(0x21); // master cmd=0x20, data=0x21 | |
| 116 maskslave = inb(0xA1); // slave command=0xA0, data=0xA1 | |
| 117 | |
| 118 outb(0x20, 0x20); // end of init | |
| 119 | |
| 120 outb(0x20, 0x11); // init + ICW1_ICW2 | |
| 121 outb(0xA0, 0x11); // init + ICW1_ICW2 | |
| 122 | |
| 123 outb(0x21, pic1); // ICW2, write offset | |
| 124 outb(0xA1, pic2); // ICW2 | |
| 125 | |
| 126 outb(0x21, 4); // ICW3, write a 4! | |
| 127 outb(0xA1, 2); // ICW3, write a 2! | |
| 128 | |
| 129 outb(0x21, 1); // ICW4, 8086 mode | |
| 130 outb(0xA1, 1); // ICW4 | |
| 131 | |
| 132 outb(0x21, maskmaster); | |
| 133 outb(0xA1, maskslave); | |
| 134 } | |
| 135 | |
| 136 // Interrupt service routines: | |
| 137 | |
| 138 void INT0handler() | |
| 139 { | |
| 140 printf("INT0 called!\n"); | |
| 141 panic("Unhandled exception!"); | |
| 142 } | |
| 143 | |
| 144 void INT1handler() | |
| 145 { | |
| 146 printf("INT1 called!\n"); | |
| 147 panic("Unhandled exception!"); | |
| 148 } | |
| 149 | |
| 150 void INT2handler() | |
| 151 { | |
| 152 printf("INT2 called!\n"); | |
| 153 panic("Unhandled exception!"); | |
| 154 } | |
| 155 | |
| 156 void INT3handler() | |
| 157 { | |
| 158 printf("INT3 called!\n"); | |
| 159 panic("Unhandled exception!"); | |
| 160 } | |
| 161 | |
| 162 void INT4handler() | |
| 163 { | |
| 164 printf("INT4 called!\n"); | |
| 165 panic("Unhandled exception!"); | |
| 166 } | |
| 167 | |
| 168 void INT5handler() | |
| 169 { | |
| 170 printf("INT5 called!\n"); | |
| 171 panic("Unhandled exception!"); | |
| 172 } | |
| 173 | |
| 174 void INT6handler() | |
| 175 { | |
| 176 printf("INT6 called!\n"); | |
| 177 panic("Unhandled exception!"); | |
| 178 } | |
| 179 | |
| 180 void INT7handler() | |
| 181 { | |
| 182 printf("INT7 called!\n"); | |
| 183 panic("Unhandled exception!"); | |
| 184 } | |
| 185 | |
| 186 void INT8handler() | |
| 187 { | |
| 188 printf("INT8 called!\n"); | |
| 189 panic("Unhandled exception!"); | |
| 190 } | |
| 191 | |
| 192 void INT9handler() | |
| 193 { | |
| 194 printf("INT9 called!\n"); | |
| 195 panic("Unhandled exception!"); | |
| 196 } | |
| 197 | |
| 198 void INT10handler() | |
| 199 { | |
| 200 printf("INT10 called!\n"); | |
| 201 panic("Unhandled exception!"); | |
| 202 } | |
| 203 | |
| 204 void INT11handler() | |
| 205 { | |
| 206 printf("INT11 called!\n"); | |
| 207 panic("Unhandled exception!"); | |
| 208 } | |
| 209 | |
| 210 void INT12handler() | |
| 211 { | |
| 212 printf("INT12 called!\n"); | |
| 213 panic("Unhandled exception!"); | |
| 214 } | |
| 215 | |
| 216 void INT13handler() | |
| 217 { | |
| 218 printf("INT13 called!\n"); | |
| 219 panic("Unhandled exception!"); | |
| 220 } | |
| 221 | |
| 17 | 222 void* getUnusedPage() |
| 223 { | |
| 14 | 224 return 0; |
| 225 } | |
| 226 | |
| 17 | 227 void mappage(uint64_t address) { |
| 14 | 228 uint32_t pageDirIndex = address >> 22; |
| 229 uint32_t pageTableIndex = (address >> 12) & 0x3FF; | |
| 230 | |
| 231 printf("Allocating page at %d, tableindex=%d\n", pageDirIndex, pageTableIndex); | |
| 232 //uint32_t *pageTable = (uint32_t*)(pageDirectory[pageDirIndex] & 0xFFFFFC00); | |
| 233 } | |
| 234 | |
| 20 | 235 void INT14handler() |
| 14 | 236 { |
| 20 | 237 uint64_t faulting_address; |
| 238 | |
| 239 // Retrieve failed page from CR2: | |
| 240 asm volatile("mov %%cr2, %0" : "=r" (faulting_address)); | |
| 241 | |
| 242 printf("INT14 called! Page fault for address 0x%X!\n", faulting_address); | |
| 243 if ( (faulting_address & 0xF0000000) == 0xD0000000 ) { | |
| 244 mappage(faulting_address & 0xFFFFF000); | |
| 14 | 245 return; |
| 246 } | |
| 247 | |
| 248 panic("Unhandled exception!"); | |
| 249 } | |
| 250 | |
| 251 void INT15handler() | |
| 252 { | |
| 253 printf("INT15 called!\n"); | |
| 254 panic("Unhandled exception!"); | |
| 255 } | |
| 256 | |
| 257 void INT16handler() | |
| 258 { | |
| 259 printf("INT16 called!\n"); | |
| 260 panic("Unhandled exception!"); | |
| 261 } | |
| 262 | |
| 263 void INT17handler() | |
| 264 { | |
| 265 printf("INT17 called!\n"); | |
| 266 panic("Unhandled exception!"); | |
| 267 } | |
| 268 | |
| 269 void INT18handler() | |
| 270 { | |
| 271 printf("INT18 called!\n"); | |
| 272 panic("Unhandled exception!"); | |
| 273 } | |
| 274 | |
| 275 void INT19handler() | |
| 276 { | |
| 277 printf("INT19 called!\n"); | |
| 278 panic("Unhandled exception!"); | |
| 279 } | |
| 280 | |
| 281 // remapped IRQ from master PIC: | |
| 282 void INT32handler() | |
| 283 { | |
| 284 // System timer. | |
| 285 //printf("INT32 called!\n"); | |
| 286 // called very frequent, what is this? | |
| 287 timerDriverUpdate(); | |
|
18
6129643f5c34
Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents:
17
diff
changeset
|
288 // Acknowledge int: |
| 14 | 289 outb(0x20, 0x20); // EOI to master |
| 290 } | |
| 291 | |
| 292 void INT33handler() | |
| 293 { | |
| 294 //printf("INT33 called, key pressed????\n"); | |
| 295 unsigned char scancode = inb(0x60); | |
| 296 //printf("Scancode = 0x%x\n", scancode); | |
| 297 keyboardDriverUpdate(scancode); | |
| 298 outb(0x20, 0x20); // EOI to master | |
| 299 } | |
| 300 | |
| 301 void INT34handler() | |
| 302 { | |
| 303 printf("INT34 called!\n"); | |
| 304 } | |
| 305 | |
| 306 void INTDEF_handler() | |
| 307 { | |
| 308 printf("Default int handler called\n"); | |
| 309 } | |
| 310 | |
| 311 |