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annotate cos/kernel/handlers.c @ 282:c137f1fe3e65
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| author | Windel Bouwman |
|---|---|
| date | Fri, 15 Nov 2013 09:32:37 +0100 |
| parents | 24ce177e01e8 |
| children |
| rev | line source |
|---|---|
| 14 | 1 #include "kernel.h" |
| 2 | |
| 3 // Assembler wrapper prototypes: | |
| 40 | 4 extern void INT255(void); |
| 5 extern void INT0(void); | |
| 6 extern void INT1(void); | |
| 7 extern void INT2(void); | |
| 8 extern void INT3(void); | |
| 9 extern void INT4(void); | |
| 10 extern void INT5(void); | |
| 11 extern void INT6(void); | |
| 12 extern void INT7(void); | |
| 13 extern void INT8(void); | |
| 14 extern void INT9(void); | |
| 15 extern void INT10(void); | |
| 16 extern void INT11(void); | |
| 17 extern void INT12(void); | |
| 18 extern void INT13(void); | |
| 19 extern void INT14(void); | |
| 20 extern void INT16(void); | |
| 21 extern void INT17(void); | |
| 22 extern void INT18(void); | |
| 23 extern void INT19(void); | |
| 33 | 24 // Remapped irq assembler wrappers: |
| 40 | 25 extern void INT32(void); |
| 26 extern void INT33(void); | |
| 27 extern void INT34(void); | |
| 28 extern void INT35(void); | |
| 29 extern void INT36(void); | |
| 30 extern void INT37(void); | |
| 31 extern void INT38(void); | |
| 32 extern void INT39(void); | |
| 33 extern void INT40(void); | |
| 34 extern void INT41(void); | |
| 35 extern void INT42(void); | |
| 36 extern void INT43(void); | |
| 37 extern void INT44(void); | |
| 38 extern void INT45(void); | |
| 39 extern void INT46(void); | |
| 40 extern 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 { |
| 36 | 48 // Fill one entry with IDT info: |
| 49 uint64_t offset; | |
| 14 | 50 |
| 36 | 51 // Typecast the function pointer to a number: |
| 52 offset = (uint64_t)handler; | |
| 14 | 53 |
| 36 | 54 // Set offset: |
| 55 idt[num].baseLow = offset & 0xFFFF; | |
| 56 idt[num].baseMid = (offset >> 16) & 0xFFFF; | |
| 57 idt[num].baseHigh = (offset >> 32) & 0xFFFFFFFF; | |
| 17 | 58 |
| 36 | 59 // Set flags and selector: |
| 60 idt[num].selector = selector; | |
| 61 idt[num].flags = flags; | |
| 17 | 62 |
| 36 | 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 | |
| 36 | 152 /* Function that prints the contents of all registers |
| 153 on the interrupted stack. */ | |
| 154 void display_registers(uint64_t *regs) | |
| 155 { | |
| 156 // Pushed by interrupt handler assembler: | |
| 157 printf("rax: %x\n", regs[6]); | |
| 158 printf("rbx: %x\n", regs[3]); | |
| 159 printf("rcx: %x\n", regs[5]); | |
| 160 printf("rdx: %x\n", regs[4]); | |
| 161 printf("rsi: %x\n", regs[1]); | |
| 162 printf("rdi: %x\n", regs[0]); | |
| 163 printf("rbp: %x\n", regs[2]); | |
| 164 // Pushed by CPU: | |
| 165 printf("rip: %x\n", regs[9]); | |
| 166 } | |
| 167 | |
| 33 | 168 void gp_fault(uint64_t *regs) |
| 169 { | |
| 170 printf("GP fault\n"); | |
| 171 printf("Error code: %x\n", regs[8]); | |
| 36 | 172 display_registers(regs); |
| 33 | 173 panic("No resolution to general protection fault!"); |
| 174 } | |
| 175 | |
| 176 void page_fault(uint64_t *regs) | |
| 177 { | |
| 178 printf("Page fault\n"); | |
| 179 uint64_t faulting_address; | |
| 180 asm volatile("mov %%cr2, %0" : "=r" (faulting_address)); | |
| 181 printf("Error code: %x\n", regs[8]); | |
| 36 | 182 display_registers(regs); |
| 33 | 183 printf("Faulting address: %x\n", faulting_address); |
| 184 panic("No resolution to page fault!"); | |
| 185 | |
| 186 } | |
| 40 | 187 |
| 31 | 188 // Global isr handler: |
| 189 // Hopefully, this function get called with the correct registers. | |
| 190 void isr_handler(uint64_t* registers) | |
| 14 | 191 { |
| 31 | 192 uint64_t intnum = registers[7]; |
| 14 | 193 |
|
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3a6a9b929db0
Added initial ramdisk and some virtual file system functions
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parents:
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changeset
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194 // TODO: make a list with handler pointers: |
| 31 | 195 if (intnum == 32) |
| 196 { | |
| 197 timerDriverUpdate(); | |
| 198 } | |
| 199 else if (intnum == 33) | |
| 200 { | |
|
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parents:
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201 keyboardDriverUpdate(); |
| 31 | 202 } |
| 33 | 203 else if (intnum == 13) |
| 204 { | |
| 205 gp_fault(registers); | |
| 206 } | |
| 207 else if (intnum == 14) | |
| 208 { | |
| 209 page_fault(registers); | |
| 210 } | |
| 211 else if (intnum == 39) | |
| 212 { | |
| 213 printf("Spurious interrupt\n"); | |
| 214 } | |
| 31 | 215 else |
| 216 { | |
| 33 | 217 printf("Interrupt %d called, registers at: %x\n", registers[7], registers); |
| 218 panic("Paniek! Unhandled interrupt!"); | |
| 31 | 219 } |
| 14 | 220 |
|
32
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
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changeset
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221 // TODO: EOI to slave? |
|
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
31
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changeset
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222 // TODO: replace this with APIC code? |
| 31 | 223 outb(0x20, 0x20); // EOI to master |
| 14 | 224 } |
| 225 |