Mercurial > lcfOS
view cos/kernel/klib.c @ 293:6aa721e7b10b
Try to improve build sequence
author | Windel Bouwman |
---|---|
date | Thu, 28 Nov 2013 20:39:37 +0100 |
parents | 91f91ff07ea8 |
children |
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#include "kernel.h" /* Panic and shutdown functions */ void magicBochsBreak() { asm volatile("xchg %bx, %bx"); } void panic(char *msg) { printf("Kernel panic: "); printf(msg); magicBochsBreak(); halt(); } void reboot() { // Use the keyboard to reboot: while ( (inb(0x64) & 0x02) == 0x02) { ; } outb(0x64, 0xFE); } void halt() { asm volatile("cli"); // Disable interrupts. asm volatile("hlt"); // Halt processor } /* IO port helpers: */ void outb(uint16_t port, uint8_t value) { asm volatile ("outb %1, %0" : : "dN" (port), "a" (value)); } uint8_t inb(uint16_t port) { uint8_t ret; asm volatile ("inb %1, %0" : "=a" (ret) : "dN" (port)); return ret; } uint16_t inw(uint16_t port) { uint16_t ret; asm volatile ("inw %1, %0" : "=a" (ret) : "dN" (port)); return ret; } /* string functions: */ int strncmp(const char* s1, const char* s2, int size) { int i; for (i=0; i<size; i++) { if (s1[i] != s2[i]) return 0; } return 1; } void memset(void* data, uint8_t value, uint64_t size) { uint64_t i; uint8_t *data2 = (uint8_t*)data; for (i = 0; i < size; i++) { data2[i] = value; } }