Mercurial > lcfOS
annotate cos/kernel/handlers.c @ 33:d8185ddb6c7b
Added more interrupt handlers
| author | windel |
|---|---|
| date | Sun, 15 Jan 2012 13:39:49 +0100 |
| parents | 3a6a9b929db0 |
| children | 91f91ff07ea8 |
| rev | line source |
|---|---|
| 14 | 1 #include "kernel.h" |
| 2 | |
| 3 // Assembler wrapper prototypes: | |
| 31 | 4 void INT255(void); |
| 14 | 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 INT16(void); | |
| 21 void INT17(void); | |
| 22 void INT18(void); | |
| 23 void INT19(void); | |
| 33 | 24 // Remapped irq assembler wrappers: |
| 14 | 25 void INT32(void); |
| 26 void INT33(void); | |
| 27 void INT34(void); | |
| 33 | 28 void INT35(void); |
| 29 void INT36(void); | |
| 30 void INT37(void); | |
| 31 void INT38(void); | |
| 32 void INT39(void); | |
| 33 void INT40(void); | |
| 34 void INT41(void); | |
| 35 void INT42(void); | |
| 36 void INT43(void); | |
| 37 void INT44(void); | |
| 38 void INT45(void); | |
| 39 void INT46(void); | |
| 40 void INT47(void); | |
| 14 | 41 |
| 42 // THE interrupt descriptor table: | |
| 24 | 43 IDT_entry *idt = (IDT_entry*)0x5000; |
| 17 | 44 volatile idtPointer idtP; |
| 14 | 45 |
| 17 | 46 void setIDTentry(int num, void (*handler)(), uint16_t selector, uint8_t flags) |
| 14 | 47 { |
| 48 // Fill one entry with IDT info: | |
| 49 uint64_t offset; | |
| 50 | |
| 17 | 51 // Typecast the function pointer to a number: |
| 52 offset = (uint64_t)handler; | |
| 14 | 53 |
| 17 | 54 // Set offset: |
| 55 idt[num].baseLow = offset & 0xFFFF; | |
| 56 idt[num].baseMid = (offset >> 16) & 0xFFFF; | |
| 57 idt[num].baseHigh = (offset >> 32) & 0xFFFFFFFF; | |
| 58 | |
| 59 // Set flags and selector: | |
| 60 idt[num].selector = selector; | |
| 61 idt[num].flags = flags; | |
| 62 | |
| 63 // Set reserved fields: | |
| 64 idt[num].reserved1 = 0; | |
| 65 idt[num].reserved2 = 0; | |
| 14 | 66 } |
| 67 | |
| 68 void setupIDT(void) { | |
| 69 int i; | |
| 26 | 70 |
| 14 | 71 // Fill all vectors with the default handler: |
| 72 for (i=0; i<256; i++) { | |
| 31 | 73 setIDTentry(i, INT255, 0x08, 0x8E); |
| 14 | 74 } |
| 75 | |
| 76 // Now set other then default handler: | |
| 17 | 77 setIDTentry(0, INT0, 0x08, 0x8E); |
| 78 setIDTentry(1, INT1, 0x08, 0x8E); | |
| 79 setIDTentry(2, INT2, 0x08, 0x8E); | |
| 80 setIDTentry(3, INT3, 0x08, 0x8E); | |
| 81 setIDTentry(4, INT4, 0x08, 0x8E); | |
| 82 setIDTentry(5, INT5, 0x08, 0x8E); | |
| 83 setIDTentry(6, INT6, 0x08, 0x8E); | |
| 84 setIDTentry(7, INT7, 0x08, 0x8E); | |
| 85 setIDTentry(8, INT8, 0x08, 0x8E); | |
| 86 setIDTentry(9, INT9, 0x08, 0x8E); | |
| 87 setIDTentry(10, INT10, 0x08, 0x8E); | |
| 88 setIDTentry(11, INT11, 0x08, 0x8E); | |
| 89 setIDTentry(12, INT12, 0x08, 0x8E); | |
| 90 setIDTentry(13, INT13, 0x08, 0x8E); | |
| 91 setIDTentry(14, INT14, 0x08, 0x8E); | |
| 31 | 92 //setIDTentry(15, INT15, 0x08, 0x8E); |
| 17 | 93 setIDTentry(16, INT16, 0x08, 0x8E); |
| 94 setIDTentry(17, INT17, 0x08, 0x8E); | |
| 95 setIDTentry(18, INT18, 0x08, 0x8E); | |
| 96 setIDTentry(19, INT19, 0x08, 0x8E); | |
| 14 | 97 /* reserved interrupts: */ |
| 98 // From int20 - int31 | |
|
18
6129643f5c34
Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents:
17
diff
changeset
|
99 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
|
100 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
|
101 setIDTentry(34, INT34, 0x08, 0x8F); |
| 33 | 102 setIDTentry(35, INT35, 0x08, 0x8F); |
| 103 setIDTentry(36, INT36, 0x08, 0x8F); | |
| 104 setIDTentry(37, INT37, 0x08, 0x8F); | |
| 105 setIDTentry(38, INT38, 0x08, 0x8F); | |
| 106 setIDTentry(39, INT39, 0x08, 0x8F); | |
| 107 setIDTentry(40, INT40, 0x08, 0x8F); | |
| 108 setIDTentry(41, INT41, 0x08, 0x8F); | |
| 109 setIDTentry(42, INT42, 0x08, 0x8F); | |
| 110 setIDTentry(43, INT43, 0x08, 0x8F); | |
| 111 setIDTentry(44, INT44, 0x08, 0x8F); | |
| 112 setIDTentry(45, INT45, 0x08, 0x8F); | |
| 113 setIDTentry(46, INT46, 0x08, 0x8F); | |
| 114 setIDTentry(47, INT47, 0x08, 0x8F); | |
| 14 | 115 |
| 17 | 116 // Set the correct values in the IDT pointer: |
| 21 | 117 idtP.base = (uint64_t)idt; |
| 17 | 118 idtP.limit = (sizeof(IDT_entry) * 256) - 1; |
| 14 | 119 // call load IDT asm function: |
| 17 | 120 loadIDT(); |
| 14 | 121 |
| 122 PICremap(); | |
| 17 | 123 asm("sti"); |
| 14 | 124 } |
| 125 | |
| 126 // PIC functions: | |
| 127 void PICremap() { | |
| 128 unsigned char maskmaster, maskslave, pic1, pic2; | |
| 129 pic1 = 0x20; // remapping location master | |
| 130 pic2 = 0x28; | |
| 131 maskmaster = inb(0x21); // master cmd=0x20, data=0x21 | |
| 132 maskslave = inb(0xA1); // slave command=0xA0, data=0xA1 | |
| 133 | |
| 134 outb(0x20, 0x20); // end of init | |
| 135 | |
| 136 outb(0x20, 0x11); // init + ICW1_ICW2 | |
| 137 outb(0xA0, 0x11); // init + ICW1_ICW2 | |
| 138 | |
| 139 outb(0x21, pic1); // ICW2, write offset | |
| 140 outb(0xA1, pic2); // ICW2 | |
| 141 | |
| 142 outb(0x21, 4); // ICW3, write a 4! | |
| 143 outb(0xA1, 2); // ICW3, write a 2! | |
| 144 | |
| 145 outb(0x21, 1); // ICW4, 8086 mode | |
| 146 outb(0xA1, 1); // ICW4 | |
| 147 | |
| 148 outb(0x21, maskmaster); | |
| 149 outb(0xA1, maskslave); | |
| 150 } | |
| 151 | |
| 33 | 152 void gp_fault(uint64_t *regs) |
| 153 { | |
| 154 printf("GP fault\n"); | |
| 155 printf("Error code: %x\n", regs[8]); | |
| 156 printf("RIP: %x\n", regs[9]); | |
| 157 panic("No resolution to general protection fault!"); | |
| 158 } | |
| 159 | |
| 160 void page_fault(uint64_t *regs) | |
| 161 { | |
| 162 printf("Page fault\n"); | |
| 163 uint64_t faulting_address; | |
| 164 asm volatile("mov %%cr2, %0" : "=r" (faulting_address)); | |
| 165 printf("Error code: %x\n", regs[8]); | |
| 166 printf("RIP: %x\n", regs[9]); | |
| 167 printf("Faulting address: %x\n", faulting_address); | |
| 168 panic("No resolution to page fault!"); | |
| 169 | |
| 170 } | |
| 31 | 171 // Global isr handler: |
| 14 | 172 |
| 31 | 173 // Hopefully, this function get called with the correct registers. |
| 174 void isr_handler(uint64_t* registers) | |
| 14 | 175 { |
| 31 | 176 uint64_t intnum = registers[7]; |
| 14 | 177 |
|
32
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
31
diff
changeset
|
178 // TODO: make a list with handler pointers: |
| 31 | 179 if (intnum == 32) |
| 180 { | |
| 181 timerDriverUpdate(); | |
| 182 } | |
| 183 else if (intnum == 33) | |
| 184 { | |
|
32
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
31
diff
changeset
|
185 keyboardDriverUpdate(); |
| 31 | 186 } |
| 33 | 187 else if (intnum == 13) |
| 188 { | |
| 189 gp_fault(registers); | |
| 190 } | |
| 191 else if (intnum == 14) | |
| 192 { | |
| 193 page_fault(registers); | |
| 194 } | |
| 195 else if (intnum == 39) | |
| 196 { | |
| 197 printf("Spurious interrupt\n"); | |
| 198 } | |
| 31 | 199 else |
| 200 { | |
| 33 | 201 printf("Interrupt %d called, registers at: %x\n", registers[7], registers); |
| 202 panic("Paniek! Unhandled interrupt!"); | |
| 31 | 203 } |
| 14 | 204 |
|
32
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
31
diff
changeset
|
205 // TODO: EOI to slave? |
|
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
31
diff
changeset
|
206 // TODO: replace this with APIC code? |
| 31 | 207 outb(0x20, 0x20); // EOI to master |
| 14 | 208 } |
| 209 | |
| 31 | 210 // Interrupt service routines: |
| 14 | 211 |
| 20 | 212 void INT14handler() |
| 14 | 213 { |
| 20 | 214 uint64_t faulting_address; |
| 215 | |
| 29 | 216 printf("Segfault!\n"); |
| 217 | |
| 20 | 218 // Retrieve failed page from CR2: |
| 219 asm volatile("mov %%cr2, %0" : "=r" (faulting_address)); | |
| 220 | |
| 221 printf("INT14 called! Page fault for address 0x%X!\n", faulting_address); | |
| 14 | 222 |
| 223 panic("Unhandled exception!"); | |
| 224 } | |
| 225 | |
| 226 void INT15handler() | |
| 227 { | |
| 228 printf("INT15 called!\n"); | |
| 229 panic("Unhandled exception!"); | |
| 230 } | |
| 231 | |
| 232 void INTDEF_handler() | |
| 233 { | |
| 29 | 234 panic("Default int handler called\n"); |
| 14 | 235 } |
| 236 |