75 lines
2.1 KiB
C
75 lines
2.1 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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#include "shell.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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terminal_state state;
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terminal_initialize_state(&state);
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terminal_set_color(&state, VGA_COLOR_BLACK, VGA_COLOR_RED);
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terminal_write_char(&state, 'H');
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terminal_set_color(&state, VGA_COLOR_BLACK, VGA_COLOR_GREEN);
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terminal_write_char(&state, 'e');
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terminal_set_color(&state, VGA_COLOR_BLACK, VGA_COLOR_BLUE);
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terminal_write_char(&state, 'l');
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terminal_set_color(&state, VGA_COLOR_BLACK, VGA_COLOR_MAGENTA);
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terminal_write_char(&state, 'l');
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terminal_set_color(&state, VGA_COLOR_BLACK, VGA_COLOR_WHITE);
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terminal_write_char(&state, 'o');
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terminal_set_color(&state, VGA_COLOR_GREEN, VGA_COLOR_WHITE);
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terminal_write_str(&state," kernel");
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terminal_set_color(&state, VGA_COLOR_LIGHT_GREY, VGA_COLOR_BLACK);
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terminal_write_str(&state," World!\n");
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terminal_write_str(&state,"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_write_str(&state,memory_str); */
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/* terminal_write_str(&state,management_str); */
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terminal_write_str(&state, (are_interrupts_enabled())? "Interrupts!\n": "No interrupts :(\n");
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shell_set_terminal_state(&state);
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exception_set_terminal_state(&state);
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interrupt_init();
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for(;;) {
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shell_step();
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}
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}
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