Mercurial > lcfOS
annotate cos/kernel/klib.c @ 299:674789d9ff37
Added a doc
| author | Windel Bouwman |
|---|---|
| date | Sun, 01 Dec 2013 18:37:23 +0100 |
| parents | 91f91ff07ea8 |
| children |
| rev | line source |
|---|---|
| 24 | 1 #include "kernel.h" |
| 2 | |
|
32
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
29
diff
changeset
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3 /* Panic and shutdown functions */ |
| 29 | 4 void magicBochsBreak() |
| 5 { | |
| 6 asm volatile("xchg %bx, %bx"); | |
| 7 } | |
| 8 | |
| 24 | 9 void panic(char *msg) |
| 10 { | |
| 11 printf("Kernel panic: "); | |
| 12 printf(msg); | |
| 13 magicBochsBreak(); | |
| 14 halt(); | |
| 15 } | |
| 16 | |
| 26 | 17 void reboot() |
| 18 { | |
| 36 | 19 // Use the keyboard to reboot: |
| 26 | 20 while ( (inb(0x64) & 0x02) == 0x02) |
| 21 { | |
| 22 ; | |
| 23 } | |
| 24 outb(0x64, 0xFE); | |
| 25 } | |
| 26 | |
| 28 | 27 void halt() |
| 28 { | |
| 36 | 29 asm volatile("cli"); // Disable interrupts. |
| 30 asm volatile("hlt"); // Halt processor | |
| 28 | 31 } |
| 32 | |
|
32
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
29
diff
changeset
|
33 /* IO port helpers: */ |
| 24 | 34 void outb(uint16_t port, uint8_t value) |
| 35 { | |
| 36 asm volatile ("outb %1, %0" : : "dN" (port), "a" (value)); | |
| 37 } | |
| 38 | |
| 39 uint8_t inb(uint16_t port) | |
| 40 { | |
| 41 uint8_t ret; | |
| 42 asm volatile ("inb %1, %0" : "=a" (ret) : "dN" (port)); | |
| 43 return ret; | |
| 44 } | |
| 45 | |
| 46 uint16_t inw(uint16_t port) | |
| 47 { | |
| 48 uint16_t ret; | |
| 49 asm volatile ("inw %1, %0" : "=a" (ret) : "dN" (port)); | |
| 50 return ret; | |
| 51 } | |
| 52 | |
|
32
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
29
diff
changeset
|
53 /* string functions: */ |
| 24 | 54 int strncmp(const char* s1, const char* s2, int size) |
| 55 { | |
| 36 | 56 int i; |
| 57 for (i=0; i<size; i++) | |
| 58 { | |
| 59 if (s1[i] != s2[i]) return 0; | |
| 60 } | |
| 61 return 1; | |
| 24 | 62 } |
| 63 | |
| 28 | 64 void memset(void* data, uint8_t value, uint64_t size) |
| 65 { | |
| 66 uint64_t i; | |
| 67 uint8_t *data2 = (uint8_t*)data; | |
| 68 for (i = 0; i < size; i++) | |
| 69 { | |
| 70 data2[i] = value; | |
| 71 } | |
| 72 } | |
| 73 |