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/*
Copyright 2021-2023 Gabriel Jensen.
This file is part of Luma.
Luma is free software: you can redistribute it
and/or modify it under the terms of the GNU
Affero General Public License as published by
the Free Software Foundation, either version 3
of the License, or (at your option) any later
version.
Luma is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU
Affero General Public License along with Luma.
If not, see <https://www.gnu.org/licenses/>.
*/
use sdl2::pixels::Color;
pub mod app;
pub mod configuration;
pub mod cpu;
pub mod cpu_handle;
pub mod instruction;
pub mod state;
pub const VERSION: (u32, u32) = (
0x0, // major
0x2D, // minor
);
pub enum Error {
BadAlignment( u32, u32),
InvalidArmOpcode( u32, u32),
InvalidThumbOpcode(u32, u16),
OutOfBounds( u32),
}
impl Error {
pub fn trap(&self) {
let message = match self {
Error::BadAlignment( address, alignment) => format!("bad alignment of address {address:#010X} (should be {alignment}-byte aligned)"),
Error::InvalidArmOpcode( address, opcode) => format!("invalid opcode {opcode:#034b} at {address:#010X}"),
Error::InvalidThumbOpcode( address, opcode) => format!("invalid opcode {opcode:#018b} at {address:#010X}"),
Error::OutOfBounds( address) => format!("out-of-bounds address {address:#010X} (limit is {:#010X})", MEMORY_LENGTH),
};
eprintln!("trap: {message}");
}
}
pub const MEMORY_LENGTH: u32 = 0x0E010000;
pub const BOOTLOADER_LENGTH: u32 = 0x00004000;
pub const IMAGE_LENGTH: u32 = 0x02000000;
pub const VIDEO_LENGTH: u32 = 0x00018000;
pub const PALETTE_LENGTH: u32 = 0x00000400;
pub const SCREEN_SIZE: (u8, u8) = (
0xF0, // width
0xA0, // height
);
pub const fn decode_colour(colour: u16) -> Color {
let red = ((colour & 0b0000000000011111) << 0x3) as u8;
let green = ((colour & 0b0000001111100000) >> 0x2) as u8;
let blue = ((colour & 0b0111110000000000) >> 0x7) as u8;
return Color::RGB(red, green, blue);
}
pub fn log(message: &str) {
// This optimises the function away.
if cfg!(debug_assertions) {
eprintln!("{message}");
}
}
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