/*
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 register 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 register Public License for more details.
You should have received a copy of the GNU
Affero register Public License along with Luma.
If not, see <https://www.gnu.org/licenses/>.
*/
use crate::{log, log_status};
use crate::cpu_mode::CpuMode;
use crate::state::State;
impl State {
pub fn bank(&mut self, mode: CpuMode) {
log_status!("banking to {}", mode.name());
let bank_index = bank_index(mode);
self.registers[0x0] = &mut self.banks[bank_index.0][ 0x0] as *mut u32;
self.registers[0x1] = &mut self.banks[bank_index.1][ 0x1] as *mut u32;
self.registers[0x2] = &mut self.banks[bank_index.2][ 0x2] as *mut u32;
self.registers[0x3] = &mut self.banks[bank_index.3][ 0x3] as *mut u32;
self.registers[0x4] = &mut self.banks[bank_index.4][ 0x4] as *mut u32;
self.registers[0x5] = &mut self.banks[bank_index.5][ 0x5] as *mut u32;
self.registers[0x6] = &mut self.banks[bank_index.6][ 0x6] as *mut u32;
self.registers[0x7] = &mut self.banks[bank_index.7][ 0x7] as *mut u32;
self.registers[0x8] = &mut self.banks[bank_index.8][ 0x8] as *mut u32;
self.registers[0x9] = &mut self.banks[bank_index.9][ 0x9] as *mut u32;
self.registers[0xA] = &mut self.banks[bank_index.10][0xA] as *mut u32;
self.registers[0xB] = &mut self.banks[bank_index.11][0xB] as *mut u32;
self.registers[0xC] = &mut self.banks[bank_index.12][0xC] as *mut u32;
self.registers[0xD] = &mut self.banks[bank_index.13][0xD] as *mut u32;
self.registers[0xE] = &mut self.banks[bank_index.14][0xE] as *mut u32;
self.registers[0xF] = &mut self.banks[bank_index.15][0xF] as *mut u32;
log!("new register layout:");
log!(" r0: {:#010X} r4: {:#010X} r8: {:#010X} r12: {:#010X}", self.read_register(0x0), self.read_register(0x4), self.read_register(0x8), self.read_register(0xC));
log!(" r1: {:#010X} r5: {:#010X} r9: {:#010X} sp: {:#010X}", self.read_register(0x1), self.read_register(0x5), self.read_register(0x9), self.read_register(0xD));
log!(" r2: {:#010X} r6: {:#010X} r10: {:#010X} lr: {:#010X}", self.read_register(0x2), self.read_register(0x6), self.read_register(0xA), self.read_register(0xE));
log!(" r3: {:#010X} r7: {:#010X} r11: {:#010X} pc: {:#010X}", self.read_register(0x3), self.read_register(0x7), self.read_register(0xB), self.read_register(0xF));
}
}
#[must_use]
fn bank_index(mode: CpuMode) -> (
usize, // r0
usize, // r1
usize, // r2
usize, // r3
usize, // r4
usize, // r5
usize, // r6
usize, // r7
usize, // r8
usize, // r9
usize, // r10
usize, // r11
usize, // r12
usize, // sp
usize, // lr
usize, // pc
) {
use CpuMode::*;
return match mode {
User => (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0),
System => (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0),
FastInterruptRequest => (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x0),
InterruptRequest => (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2, 0x2, 0x0),
Supervisor => (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3, 0x3, 0x0),
Abort => (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4, 0x4, 0x0),
Undefined => (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x5, 0x5, 0x0),
};
}
