Separated functionality into separate files. Added initial (untested) support for ARM.
This commit is contained in:
160
kernel/brados.c
160
kernel/brados.c
@ -1,156 +1,44 @@
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#include <brados/string.h>
|
||||
#include <video/vga.h>
|
||||
|
||||
// Make sure we are using the right compiler
|
||||
#if defined(__linux__)
|
||||
#error "You are using the wrong compiler."
|
||||
#endif
|
||||
|
||||
// Color constants
|
||||
enum vga_color
|
||||
// Test various VGA functionality
|
||||
void vgaTests(struct vgastate *term)
|
||||
{
|
||||
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
|
||||
};
|
||||
|
||||
// Create a VGA color
|
||||
uint8_t make_color(enum vga_color fg, enum vga_color bg)
|
||||
{
|
||||
return fg | bg << 4;
|
||||
}
|
||||
|
||||
// Create a VGA character
|
||||
uint16_t make_vgaEntry(char c, uint8_t color)
|
||||
{
|
||||
uint16_t c16 = c;
|
||||
uint16_t color16 = color;
|
||||
return c16 | color16 << 8;
|
||||
}
|
||||
|
||||
// Calculate the length of a string
|
||||
size_t strlen(const char *str)
|
||||
{
|
||||
size_t len = 0;
|
||||
while (str[len] != 0)
|
||||
len++;
|
||||
return len;
|
||||
}
|
||||
|
||||
static const size_t VGA_WIDTH = 80;
|
||||
static const size_t VGA_HEIGHT = 24;
|
||||
|
||||
size_t term_row, term_col;
|
||||
uint8_t term_color;
|
||||
uint16_t *term_buf;
|
||||
|
||||
// Initialize the terminal
|
||||
void term_init()
|
||||
{
|
||||
term_row = term_col = 0;
|
||||
term_color = make_color(COLOR_LIGHT_GREY, COLOR_BLACK);
|
||||
term_buf = (uint16_t *) 0xB8000;
|
||||
// Test line wrapping
|
||||
term_writeStr(term, "Welcome to the desert of the real. I thought what I'd do was I'd pretend I was one of those deaf mutes.\n\n");
|
||||
|
||||
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;
|
||||
term_buf[index] = make_vgaEntry(' ', term_color);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Set the terminal color
|
||||
void term_setColor(uint8_t color)
|
||||
{
|
||||
term_color = color;
|
||||
}
|
||||
|
||||
// Place a character in the buffer
|
||||
void term_putEntryAt(char c, uint8_t color, size_t x, size_t y)
|
||||
{
|
||||
const size_t index = y * VGA_WIDTH + x;
|
||||
term_buf[index] = make_vgaEntry(c, color);
|
||||
}
|
||||
|
||||
// Scroll down 1 line
|
||||
void term_scroll()
|
||||
{
|
||||
for (size_t y = 1; y < VGA_HEIGHT; y++) {
|
||||
for (size_t x = 0; x < VGA_WIDTH; x++) {
|
||||
const size_t index = y * VGA_WIDTH + x;
|
||||
const size_t indexBelow = (y - 1) * VGA_WIDTH + x;
|
||||
term_buf[indexBelow] = term_buf[index];
|
||||
}
|
||||
}
|
||||
// Test colors
|
||||
term_setColor(term, make_color(VGA_COLOR_BLACK, VGA_COLOR_WHITE));
|
||||
term_writeStr(term, "This text should be inverse.\n");
|
||||
term_setColor(term, make_color(VGA_COLOR_LIGHT_BLUE, VGA_COLOR_GREEN));
|
||||
term_writeStr(term, "This text should be colorful.\n\n");
|
||||
|
||||
for (size_t x = 0; x < VGA_WIDTH; x++) {
|
||||
const size_t index = (VGA_HEIGHT - 1) * VGA_WIDTH + x;
|
||||
term_buf[index] = ' ';
|
||||
// Test scrolling
|
||||
term_setColor(term, make_color(VGA_COLOR_LIGHT_GREY, VGA_COLOR_BLACK));
|
||||
for (size_t i = 0; i < 20; i++) {
|
||||
term_writeStr(term, "Printing some lines.\n");
|
||||
for (volatile size_t j = 0; j < 100000000; j++);
|
||||
}
|
||||
}
|
||||
|
||||
// Write a character to the terminal
|
||||
void term_putChar(char c)
|
||||
{
|
||||
if (c == '\n')
|
||||
term_col = VGA_WIDTH - 1;
|
||||
else
|
||||
term_putEntryAt(c, term_color, term_col, term_row);
|
||||
|
||||
if (++term_col == VGA_WIDTH) {
|
||||
term_col = 0;
|
||||
if (++term_row == VGA_HEIGHT) {
|
||||
term_row--;
|
||||
term_scroll();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Write a string to the terminal
|
||||
void term_writeStr(const char *data)
|
||||
{
|
||||
size_t dataLen = strlen(data);
|
||||
for (size_t i = 0; i < dataLen; i++)
|
||||
term_putChar(data[i]);
|
||||
}
|
||||
|
||||
// Main kernel function
|
||||
void brados_main()
|
||||
{
|
||||
term_init();
|
||||
struct vgastate term;
|
||||
term_init(&term);
|
||||
|
||||
// Test printing and newlines
|
||||
term_writeStr("Welcome to BRaDOS!\n");
|
||||
term_writeStr("written by L. Bradley LaBoon\n\n");
|
||||
// Welcome message
|
||||
term_writeStr(&term, "Welcome to BRaDOS!\n");
|
||||
term_writeStr(&term, "written by L. Bradley LaBoon\n\n");
|
||||
|
||||
// Test line wrapping
|
||||
term_writeStr("The Laughing Man always says: 'I thought what I'd do was I'd pretend I was one of those deaf mutes.'\n\n");
|
||||
vgaTests(&term);
|
||||
|
||||
// Test colors
|
||||
term_setColor(make_color(COLOR_BLACK, COLOR_WHITE));
|
||||
term_writeStr("This text should be inverse.\n");
|
||||
term_setColor(make_color(COLOR_LIGHT_BLUE, COLOR_GREEN));
|
||||
term_writeStr("This text should be colorful.\n\n");
|
||||
|
||||
// Test scrolling
|
||||
term_setColor(make_color(COLOR_LIGHT_GREY, COLOR_BLACK));
|
||||
for (size_t i = 0; i < 20; i++) {
|
||||
term_writeStr("Printing some lines.\n");
|
||||
for (size_t j = 0; j < 100000000; j++);
|
||||
}
|
||||
|
||||
term_writeStr("Done.");
|
||||
term_writeStr(&term, "Done.");
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user