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