67 lines
No EOL
1.7 KiB
C
67 lines
No EOL
1.7 KiB
C
/* Check if the compiler thinks you are targeting the wrong operating system. */
|
|
#if defined(__linux__)
|
|
#error "You are not using a cross-compiler, you will most certainly run into trouble"
|
|
#endif
|
|
|
|
/* This tutorial will only work for the 32-bit ix86 targets. */
|
|
#if !defined(__i386__)
|
|
#error "This kernel needs to be compiled with a ix86-elf compiler"
|
|
#endif
|
|
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include "terminal.c"
|
|
#include "memory.c"
|
|
#include "interrupts.c"
|
|
|
|
static inline bool are_interrupts_enabled() {
|
|
unsigned long flags;
|
|
asm volatile ( "pushf\n\t"
|
|
"pop %0"
|
|
: "=g"(flags) );
|
|
return flags & (1 << 9);
|
|
}
|
|
|
|
void kernel_main(void)
|
|
{
|
|
/* Initialize terminal interface */
|
|
terminal_initialize();
|
|
|
|
terminal_putchar('H');
|
|
terminal_putchar('e');
|
|
terminal_putchar('l');
|
|
terminal_putchar('l');
|
|
terminal_putchar('o');
|
|
|
|
terminal_setcolor(vga_entry_color(VGA_COLOR_GREEN, VGA_COLOR_BLACK));
|
|
terminal_writestring(" kernel");
|
|
terminal_setcolor(vga_entry_color(VGA_COLOR_LIGHT_GREY, VGA_COLOR_BLACK));
|
|
terminal_writestring(" World!\n");
|
|
terminal_writestring("Newlines!\n");
|
|
|
|
char* memory_str = alloc(sizeof(char) * 7);
|
|
for (int i = 0; i < 6; i++) {
|
|
memory_str[i] = "Memory"[i];
|
|
}
|
|
memory_str[6] = 0;
|
|
|
|
char* management_str = alloc(sizeof(char) * 13);
|
|
for (int i = 0; i < 13; i++) {
|
|
management_str[i] = " management!\n"[i];
|
|
}
|
|
management_str[13] = 0;
|
|
|
|
terminal_writestring(memory_str);
|
|
terminal_writestring(management_str);
|
|
|
|
terminal_writestring((are_interrupts_enabled())? "Interrupts!\n": "No interrupts :(\n");
|
|
|
|
interrupt_init();
|
|
|
|
for(;;) {
|
|
char curr_char = getchar();
|
|
terminal_putchar(curr_char);
|
|
}
|
|
} |