Mercurial > lcfOS
annotate cos/kernel/handlers.c @ 30:0148f55bfe24
Added static asserts and fixed pages
| author | windel |
|---|---|
| date | Thu, 29 Dec 2011 23:51:35 +0100 |
| parents | 7e3bdcb391dc |
| children | 88590c42320f |
| rev | line source |
|---|---|
| 14 | 1 #include "kernel.h" |
| 2 | |
| 3 // Assembler wrapper prototypes: | |
| 4 void INTDEF(void); | |
| 5 void INT0(void); | |
| 6 void INT1(void); | |
| 7 void INT2(void); | |
| 8 void INT3(void); | |
| 9 void INT4(void); | |
| 10 void INT5(void); | |
| 11 void INT6(void); | |
| 12 void INT7(void); | |
| 13 void INT8(void); | |
| 14 void INT9(void); | |
| 15 void INT10(void); | |
| 16 void INT11(void); | |
| 17 void INT12(void); | |
| 18 void INT13(void); | |
| 19 void INT14(void); | |
| 20 void INT15(void); | |
| 21 void INT16(void); | |
| 22 void INT17(void); | |
| 23 void INT18(void); | |
| 24 void INT19(void); | |
| 25 // Remapped handlers: | |
| 26 void INT32(void); | |
| 27 void INT33(void); | |
| 28 void INT34(void); | |
| 29 | |
| 30 // THE interrupt descriptor table: | |
| 24 | 31 IDT_entry *idt = (IDT_entry*)0x5000; |
| 17 | 32 volatile idtPointer idtP; |
| 14 | 33 |
| 17 | 34 void setIDTentry(int num, void (*handler)(), uint16_t selector, uint8_t flags) |
| 14 | 35 { |
| 36 // Fill one entry with IDT info: | |
| 37 uint64_t offset; | |
| 38 | |
| 17 | 39 // Typecast the function pointer to a number: |
| 40 offset = (uint64_t)handler; | |
| 14 | 41 |
| 24 | 42 //panic("Almost setting an IDT entry"); |
| 43 | |
| 17 | 44 // Set offset: |
| 45 idt[num].baseLow = offset & 0xFFFF; | |
| 46 idt[num].baseMid = (offset >> 16) & 0xFFFF; | |
| 47 idt[num].baseHigh = (offset >> 32) & 0xFFFFFFFF; | |
| 48 | |
| 49 // Set flags and selector: | |
| 50 idt[num].selector = selector; | |
| 51 idt[num].flags = flags; | |
| 52 | |
| 53 // Set reserved fields: | |
| 54 idt[num].reserved1 = 0; | |
| 55 idt[num].reserved2 = 0; | |
| 14 | 56 } |
| 57 | |
| 58 void setupIDT(void) { | |
| 59 int i; | |
| 26 | 60 |
| 14 | 61 // Fill all vectors with the default handler: |
| 62 for (i=0; i<256; i++) { | |
| 24 | 63 setIDTentry(i, INTDEF, 0x08, 0x8E); |
| 14 | 64 } |
| 65 | |
| 66 // Now set other then default handler: | |
| 17 | 67 setIDTentry(0, INT0, 0x08, 0x8E); |
| 68 setIDTentry(1, INT1, 0x08, 0x8E); | |
| 69 setIDTentry(2, INT2, 0x08, 0x8E); | |
| 70 setIDTentry(3, INT3, 0x08, 0x8E); | |
| 71 setIDTentry(4, INT4, 0x08, 0x8E); | |
| 72 setIDTentry(5, INT5, 0x08, 0x8E); | |
| 73 setIDTentry(6, INT6, 0x08, 0x8E); | |
| 74 setIDTentry(7, INT7, 0x08, 0x8E); | |
| 75 setIDTentry(8, INT8, 0x08, 0x8E); | |
| 76 setIDTentry(9, INT9, 0x08, 0x8E); | |
| 77 setIDTentry(10, INT10, 0x08, 0x8E); | |
| 78 setIDTentry(11, INT11, 0x08, 0x8E); | |
| 79 setIDTentry(12, INT12, 0x08, 0x8E); | |
| 80 setIDTentry(13, INT13, 0x08, 0x8E); | |
| 81 setIDTentry(14, INT14, 0x08, 0x8E); | |
| 82 setIDTentry(15, INT15, 0x08, 0x8E); | |
| 83 setIDTentry(16, INT16, 0x08, 0x8E); | |
| 84 setIDTentry(17, INT17, 0x08, 0x8E); | |
| 85 setIDTentry(18, INT18, 0x08, 0x8E); | |
| 86 setIDTentry(19, INT19, 0x08, 0x8E); | |
| 14 | 87 /* reserved interrupts: */ |
| 88 // From int20 - int31 | |
|
18
6129643f5c34
Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents:
17
diff
changeset
|
89 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
|
90 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
|
91 setIDTentry(34, INT34, 0x08, 0x8F); |
| 14 | 92 |
| 17 | 93 // Set the correct values in the IDT pointer: |
| 21 | 94 idtP.base = (uint64_t)idt; |
| 17 | 95 idtP.limit = (sizeof(IDT_entry) * 256) - 1; |
| 14 | 96 // call load IDT asm function: |
| 17 | 97 loadIDT(); |
| 14 | 98 |
| 99 PICremap(); | |
| 17 | 100 asm("sti"); |
| 14 | 101 } |
| 102 | |
| 103 // PIC functions: | |
| 104 void PICremap() { | |
| 105 unsigned char maskmaster, maskslave, pic1, pic2; | |
| 106 pic1 = 0x20; // remapping location master | |
| 107 pic2 = 0x28; | |
| 108 maskmaster = inb(0x21); // master cmd=0x20, data=0x21 | |
| 109 maskslave = inb(0xA1); // slave command=0xA0, data=0xA1 | |
| 110 | |
| 111 outb(0x20, 0x20); // end of init | |
| 112 | |
| 113 outb(0x20, 0x11); // init + ICW1_ICW2 | |
| 114 outb(0xA0, 0x11); // init + ICW1_ICW2 | |
| 115 | |
| 116 outb(0x21, pic1); // ICW2, write offset | |
| 117 outb(0xA1, pic2); // ICW2 | |
| 118 | |
| 119 outb(0x21, 4); // ICW3, write a 4! | |
| 120 outb(0xA1, 2); // ICW3, write a 2! | |
| 121 | |
| 122 outb(0x21, 1); // ICW4, 8086 mode | |
| 123 outb(0xA1, 1); // ICW4 | |
| 124 | |
| 125 outb(0x21, maskmaster); | |
| 126 outb(0xA1, maskslave); | |
| 127 } | |
| 128 | |
| 129 // Interrupt service routines: | |
| 130 | |
| 131 void INT0handler() | |
| 132 { | |
| 133 printf("INT0 called!\n"); | |
| 134 panic("Unhandled exception!"); | |
| 135 } | |
| 136 | |
| 137 void INT1handler() | |
| 138 { | |
| 139 printf("INT1 called!\n"); | |
| 140 panic("Unhandled exception!"); | |
| 141 } | |
| 142 | |
| 143 void INT2handler() | |
| 144 { | |
| 145 printf("INT2 called!\n"); | |
| 146 panic("Unhandled exception!"); | |
| 147 } | |
| 148 | |
| 149 void INT3handler() | |
| 150 { | |
| 151 printf("INT3 called!\n"); | |
| 152 panic("Unhandled exception!"); | |
| 153 } | |
| 154 | |
| 155 void INT4handler() | |
| 156 { | |
| 157 printf("INT4 called!\n"); | |
| 158 panic("Unhandled exception!"); | |
| 159 } | |
| 160 | |
| 161 void INT5handler() | |
| 162 { | |
| 163 printf("INT5 called!\n"); | |
| 164 panic("Unhandled exception!"); | |
| 165 } | |
| 166 | |
| 167 void INT6handler() | |
| 168 { | |
| 169 printf("INT6 called!\n"); | |
| 170 panic("Unhandled exception!"); | |
| 171 } | |
| 172 | |
| 173 void INT7handler() | |
| 174 { | |
| 175 printf("INT7 called!\n"); | |
| 176 panic("Unhandled exception!"); | |
| 177 } | |
| 178 | |
| 179 void INT8handler() | |
| 180 { | |
| 181 printf("INT8 called!\n"); | |
| 182 panic("Unhandled exception!"); | |
| 183 } | |
| 184 | |
| 185 void INT9handler() | |
| 186 { | |
| 187 printf("INT9 called!\n"); | |
| 188 panic("Unhandled exception!"); | |
| 189 } | |
| 190 | |
| 191 void INT10handler() | |
| 192 { | |
| 193 printf("INT10 called!\n"); | |
| 194 panic("Unhandled exception!"); | |
| 195 } | |
| 196 | |
| 197 void INT11handler() | |
| 198 { | |
| 199 printf("INT11 called!\n"); | |
| 200 panic("Unhandled exception!"); | |
| 201 } | |
| 202 | |
| 203 void INT12handler() | |
| 204 { | |
| 205 printf("INT12 called!\n"); | |
| 206 panic("Unhandled exception!"); | |
| 207 } | |
| 208 | |
| 209 void INT13handler() | |
| 210 { | |
| 211 printf("INT13 called!\n"); | |
| 212 panic("Unhandled exception!"); | |
| 213 } | |
| 214 | |
| 17 | 215 void* getUnusedPage() |
| 216 { | |
| 14 | 217 return 0; |
| 218 } | |
| 219 | |
| 17 | 220 void mappage(uint64_t address) { |
| 14 | 221 uint32_t pageDirIndex = address >> 22; |
| 222 uint32_t pageTableIndex = (address >> 12) & 0x3FF; | |
| 223 | |
| 224 printf("Allocating page at %d, tableindex=%d\n", pageDirIndex, pageTableIndex); | |
| 225 //uint32_t *pageTable = (uint32_t*)(pageDirectory[pageDirIndex] & 0xFFFFFC00); | |
| 226 } | |
| 227 | |
| 20 | 228 void INT14handler() |
| 14 | 229 { |
| 20 | 230 uint64_t faulting_address; |
| 231 | |
| 29 | 232 printf("Segfault!\n"); |
| 233 | |
| 20 | 234 // Retrieve failed page from CR2: |
| 235 asm volatile("mov %%cr2, %0" : "=r" (faulting_address)); | |
| 236 | |
| 237 printf("INT14 called! Page fault for address 0x%X!\n", faulting_address); | |
| 238 if ( (faulting_address & 0xF0000000) == 0xD0000000 ) { | |
| 239 mappage(faulting_address & 0xFFFFF000); | |
| 14 | 240 return; |
| 241 } | |
| 242 | |
| 243 panic("Unhandled exception!"); | |
| 244 } | |
| 245 | |
| 246 void INT15handler() | |
| 247 { | |
| 248 printf("INT15 called!\n"); | |
| 249 panic("Unhandled exception!"); | |
| 250 } | |
| 251 | |
| 252 void INT16handler() | |
| 253 { | |
| 254 printf("INT16 called!\n"); | |
| 255 panic("Unhandled exception!"); | |
| 256 } | |
| 257 | |
| 258 void INT17handler() | |
| 259 { | |
| 260 printf("INT17 called!\n"); | |
| 261 panic("Unhandled exception!"); | |
| 262 } | |
| 263 | |
| 264 void INT18handler() | |
| 265 { | |
| 266 printf("INT18 called!\n"); | |
| 267 panic("Unhandled exception!"); | |
| 268 } | |
| 269 | |
| 270 void INT19handler() | |
| 271 { | |
| 272 printf("INT19 called!\n"); | |
| 273 panic("Unhandled exception!"); | |
| 274 } | |
| 275 | |
| 276 // remapped IRQ from master PIC: | |
| 277 void INT32handler() | |
| 278 { | |
| 279 // System timer. | |
| 280 //printf("INT32 called!\n"); | |
| 281 // called very frequent, what is this? | |
| 282 timerDriverUpdate(); | |
|
18
6129643f5c34
Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents:
17
diff
changeset
|
283 // Acknowledge int: |
| 14 | 284 outb(0x20, 0x20); // EOI to master |
| 285 } | |
| 286 | |
| 287 void INT33handler() | |
| 288 { | |
| 289 //printf("INT33 called, key pressed????\n"); | |
| 290 unsigned char scancode = inb(0x60); | |
| 291 //printf("Scancode = 0x%x\n", scancode); | |
| 292 keyboardDriverUpdate(scancode); | |
| 293 outb(0x20, 0x20); // EOI to master | |
| 294 } | |
| 295 | |
| 296 void INT34handler() | |
| 297 { | |
| 298 printf("INT34 called!\n"); | |
| 299 } | |
| 300 | |
| 301 void INTDEF_handler() | |
| 302 { | |
| 29 | 303 panic("Default int handler called\n"); |
| 14 | 304 } |
| 305 |