From 2dc94f5862cfc9bae087ea04dfac56bcf0d0a02f Mon Sep 17 00:00:00 2001
From: ty2-yuen <tsz2.yuen@live.uwe.ac.uk>
Date: Fri, 6 Nov 2020 15:23:25 +0000
Subject: [PATCH] Delete kernel.c
---
minimalOS/kernel.c | 115 ---------------------------------------------
1 file changed, 115 deletions(-)
delete mode 100644 minimalOS/kernel.c
diff --git a/minimalOS/kernel.c b/minimalOS/kernel.c
deleted file mode 100644
index e41db16..0000000
--- a/minimalOS/kernel.c
+++ /dev/null
@@ -1,115 +0,0 @@
-/*
- * Desc: Minimal OS, to show how to boot an x86 machine. UFCFWK-15-2
- */
-#if !defined(__cplusplus)
-#include <stdbool.h> /* C doesn't have booleans by default. */
-#endif
-#include <stddef.h>
-#include <stdint.h>
-
-/* Check if the compiler thinks we 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 tutorial needs to be compiled with a ix86-elf compiler"
-#endif
-
-/* Hardware text mode color constants. */
-enum vga_color {
- COLOR_BLACK = 0,
- COLOR_BLUE = 1,
- COLOR_GREEN = 2,
- COLOR_CYAN = 3,
- COLOR_RED = 4,
- COLOR_MAGENTA = 5,
- COLOR_BROWN = 6,
- COLOR_LIGHT_GREY = 7,
- COLOR_DARK_GREY = 8,
- COLOR_LIGHT_BLUE = 9,
- COLOR_LIGHT_GREEN = 10,
- COLOR_LIGHT_CYAN = 11,
- COLOR_LIGHT_RED = 12,
- COLOR_LIGHT_MAGENTA = 13,
- COLOR_LIGHT_BROWN = 14,
- COLOR_WHITE = 15,
-};
-
-uint8_t make_color(enum vga_color fg, enum vga_color bg) {
- return fg | bg << 4;
-}
-
-uint16_t make_vgaentry(char c, uint8_t color) {
- uint16_t c16 = c;
- uint16_t color16 = color;
- return c16 | color16 << 8;
-}
-
-size_t strlen(const char* str) {
- size_t ret = 0;
- while ( str[ret] != 0 )
- ret++;
- return ret;
-}
-
-static const size_t VGA_WIDTH = 80;
-static const size_t VGA_HEIGHT = 25;
-
-size_t terminal_row;
-size_t terminal_column;
-uint8_t terminal_color;
-uint16_t* terminal_buffer;
-
-void terminal_initialize() {
- terminal_row = 0;
- terminal_column = 0;
- terminal_color = make_color(COLOR_LIGHT_GREY, COLOR_BLACK);
- terminal_buffer = (uint16_t*) 0xB8000;
- for (size_t y = 0; y < VGA_HEIGHT; y++) {
- for (size_t x = 0; x < VGA_WIDTH; x++) {
- const size_t index = y * VGA_WIDTH + x;
- terminal_buffer[index] = make_vgaentry(' ', terminal_color);
- }
- }
-}
-
-void terminal_setcolor(uint8_t color) {
- terminal_color = color;
-}
-
-void terminal_putentryat(char c, uint8_t color, size_t x, size_t y) {
- const size_t index = y * VGA_WIDTH + x;
- terminal_buffer[index] = make_vgaentry(c, color);
-}
-
-void terminal_putchar(char c) {
- terminal_putentryat(c, terminal_color, terminal_column, terminal_row);
- if (++terminal_column == VGA_WIDTH) {
- terminal_column = 0;
- if (++terminal_row == VGA_HEIGHT) {
- terminal_row = 0;
- }
- }
-}
-
-void terminal_writestring(const char* data) {
- size_t datalen = strlen(data);
- for (size_t i = 0; i < datalen; i++)
- terminal_putchar(data[i]);
-}
-
-#if defined(__cplusplus)
-extern "C" /* Use C linkage for kernel_main. */
-#endif
-void kernel_main() {
- /* Initialize terminal interface */
- terminal_initialize();
-
- /* Since there is no support for newlines in terminal_putchar
- * yet, '\n' will produce some VGA specific character instead.
- * This is normal.
- */
- terminal_writestring("Hello, kernel World!\n");
-}
--
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