Mercurial > lcfOS
annotate cos/kernel/klib.c @ 34:8012221dd740
Fixes for uninitialized data. This causes problems on real machines
| author | windel |
|---|---|
| date | Mon, 16 Jan 2012 13:46:06 +0100 |
| parents | 3a6a9b929db0 |
| children | 91f91ff07ea8 |
| 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
|
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 { | |
| 19 while ( (inb(0x64) & 0x02) == 0x02) | |
| 20 { | |
| 21 ; | |
| 22 } | |
| 23 outb(0x64, 0xFE); | |
| 24 } | |
| 25 | |
| 28 | 26 void halt() |
| 27 { | |
| 28 asm volatile("cli"); | |
| 29 asm volatile("hlt"); | |
| 30 } | |
| 31 | |
|
32
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
29
diff
changeset
|
32 /* IO port helpers: */ |
| 24 | 33 void outb(uint16_t port, uint8_t value) |
| 34 { | |
| 35 asm volatile ("outb %1, %0" : : "dN" (port), "a" (value)); | |
| 36 } | |
| 37 | |
| 38 uint8_t inb(uint16_t port) | |
| 39 { | |
| 40 uint8_t ret; | |
| 41 asm volatile ("inb %1, %0" : "=a" (ret) : "dN" (port)); | |
| 42 return ret; | |
| 43 } | |
| 44 | |
| 45 uint16_t inw(uint16_t port) | |
| 46 { | |
| 47 uint16_t ret; | |
| 48 asm volatile ("inw %1, %0" : "=a" (ret) : "dN" (port)); | |
| 49 return ret; | |
| 50 } | |
| 51 | |
|
32
3a6a9b929db0
Added initial ramdisk and some virtual file system functions
windel
parents:
29
diff
changeset
|
52 /* string functions: */ |
| 24 | 53 int strncmp(const char* s1, const char* s2, int size) |
| 54 { | |
| 55 int i; | |
| 56 for (i=0; i<size; i++) | |
| 57 { | |
| 58 if (s1[i] != s2[i]) return 0; | |
| 59 } | |
| 60 return 1; | |
| 61 } | |
| 62 | |
| 28 | 63 void memset(void* data, uint8_t value, uint64_t size) |
| 64 { | |
| 65 uint64_t i; | |
| 66 uint8_t *data2 = (uint8_t*)data; | |
| 67 for (i = 0; i < size; i++) | |
| 68 { | |
| 69 data2[i] = value; | |
| 70 } | |
| 71 } | |
| 72 |