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//! Kernel Entry
const boot = @import("boot.zig");
const asm_ops = @import("../asm/asm.zig");
pub const BootParams = boot.BootParams;
pub fn main(boot_params_ptr: *boot.BootParams) noreturn {
if (!boot_params_ptr.is_valid()) {
if (boot_params_ptr.framebuffer.base != 0) {
draw_error_screen(boot_params_ptr);
}
asm_ops.cpu.halt.halt_loop();
}
draw_boot_screen(boot_params_ptr);
asm_ops.cpu.halt.halt_loop();
}
fn draw_boot_screen(params: *boot.BootParams) void {
const fb = params.framebuffer;
const base: [*]u32 = @ptrFromInt(fb.base);
const stride = fb.stride;
const bg_color: u32 = switch (fb.pixel_format) {
.rgb => 0x1E0030,
.bgr => 0x30001E,
else => 0x1E0030,
};
var row: u32 = 0;
while (row < fb.height) : (row += 1) {
var col: u32 = 0;
while (col < fb.width) : (col += 1) {
base[row * stride + col] = bg_color;
}
}
const text_color: u32 = switch (fb.pixel_format) {
.rgb => 0x00FFFF,
.bgr => 0xFFFF00,
else => 0x00FFFF,
};
const banner = [_][]const u8{
" A K K III BBB A ",
" A A K K I B B A A ",
" AAAAA KK I BBB AAAAA ",
" A A K K I B B A A ",
" A A K K III BBB A A ",
};
const start_x = (fb.width - 29 * 8) / 2;
const start_y = fb.height / 3;
for (banner, 0..) |line, line_row| {
for (line, 0..) |char, line_col| {
if (char != ' ') {
draw_block(base, stride, start_x + @as(u32, @truncate(line_col)) * 8, start_y + @as(u32, @truncate(line_row)) * 12, text_color);
}
}
}
const subtitle = "AkibaOS Kernel Loaded Successfully";
const subtitle_x = (fb.width - @as(u32, @truncate(subtitle.len)) * 8) / 2;
const subtitle_y = start_y + 80;
for (0..subtitle.len) |idx| {
draw_small_block(base, stride, subtitle_x + @as(u32, @truncate(idx)) * 8, subtitle_y, 0xFF80C0);
}
}
fn draw_error_screen(params: *boot.BootParams) void {
const fb = params.framebuffer;
const base: [*]u32 = @ptrFromInt(fb.base);
const stride = fb.stride;
const error_color: u32 = switch (fb.pixel_format) {
.rgb => 0xFF0000,
.bgr => 0x0000FF,
else => 0xFF0000,
};
var row: u32 = 0;
while (row < fb.height) : (row += 1) {
var col: u32 = 0;
while (col < fb.width) : (col += 1) {
base[row * stride + col] = error_color;
}
}
}
fn draw_block(base: [*]u32, stride: u32, x_pos: u32, y_pos: u32, color: u32) void {
var dy: u32 = 0;
while (dy < 10) : (dy += 1) {
var dx: u32 = 0;
while (dx < 6) : (dx += 1) {
base[(y_pos + dy) * stride + x_pos + dx] = color;
}
}
}
fn draw_small_block(base: [*]u32, stride: u32, x_pos: u32, y_pos: u32, color: u32) void {
var dy: u32 = 0;
while (dy < 2) : (dy += 1) {
var dx: u32 = 0;
while (dx < 6) : (dx += 1) {
base[(y_pos + dy) * stride + x_pos + dx] = color;
}
}
}
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