2021-10-09 06:11:52 +00:00
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use std::rc::Rc;
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2021-10-18 19:05:10 +00:00
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use std::cell::RefCell;
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2021-10-09 06:11:52 +00:00
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use crate::error::Error;
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use crate::system::System;
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2023-04-24 01:49:40 +00:00
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use crate::clock::{ClockTime, ClockDuration};
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2021-10-09 06:11:52 +00:00
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2021-10-24 05:22:02 +00:00
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/// A universal memory address used by the Addressable trait
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2021-10-17 03:30:50 +00:00
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pub type Address = u64;
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2021-10-09 06:11:52 +00:00
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2021-10-17 17:39:43 +00:00
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2021-10-11 22:04:39 +00:00
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/// A device that can change state over time. The `step()` method will be called
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/// by the containing `System` when the system clock advances. If an error occurs
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/// with any device, the `on_error()` method will be called to display any state
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/// information that might be helpful for debugging.
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2021-10-09 06:11:52 +00:00
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pub trait Steppable {
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2023-04-23 22:46:47 +00:00
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fn step(&mut self, system: &System) -> Result<ClockDuration, Error>;
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2021-10-09 06:11:52 +00:00
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fn on_error(&mut self, _system: &System) { }
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}
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2021-10-11 22:04:39 +00:00
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/// A device that can receive an interrupt. The `interrupt_state_change()` method
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/// will be called whenever an interrupt signal changes goes high or low.
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2021-10-09 06:11:52 +00:00
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pub trait Interruptable {
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2021-10-30 05:02:29 +00:00
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//fn interrupt_state_change(&mut self, state: bool, priority: u8, number: u8) -> Result<(), Error>;
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2021-10-09 06:11:52 +00:00
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}
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2021-10-17 03:30:50 +00:00
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/// A device that can be addressed to read data from or write data to the device.
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2023-03-06 04:19:49 +00:00
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#[allow(clippy::len_without_is_empty)]
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2021-10-17 03:30:50 +00:00
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pub trait Addressable {
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fn len(&self) -> usize;
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2023-04-24 01:49:40 +00:00
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fn read(&mut self, clock: ClockTime, addr: Address, data: &mut [u8]) -> Result<(), Error>;
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fn write(&mut self, clock: ClockTime, addr: Address, data: &[u8]) -> Result<(), Error>;
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2021-10-17 03:30:50 +00:00
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2023-04-24 01:49:40 +00:00
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fn read_u8(&mut self, clock: ClockTime, addr: Address) -> Result<u8, Error> {
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2021-10-27 00:33:23 +00:00
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let mut data = [0; 1];
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2023-04-24 01:49:40 +00:00
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self.read(clock, addr, &mut data)?;
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2021-10-27 00:33:23 +00:00
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Ok(data[0])
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}
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2023-04-24 01:49:40 +00:00
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fn read_beu16(&mut self, clock: ClockTime, addr: Address) -> Result<u16, Error> {
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2021-10-27 00:33:23 +00:00
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let mut data = [0; 2];
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2023-04-24 01:49:40 +00:00
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self.read(clock, addr, &mut data)?;
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2021-10-27 00:33:23 +00:00
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Ok(read_beu16(&data))
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2021-10-17 03:30:50 +00:00
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}
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2023-04-24 01:49:40 +00:00
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fn read_leu16(&mut self, clock: ClockTime, addr: Address) -> Result<u16, Error> {
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2021-11-03 03:33:27 +00:00
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let mut data = [0; 2];
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2023-04-24 01:49:40 +00:00
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self.read(clock, addr, &mut data)?;
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2021-11-03 03:33:27 +00:00
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Ok(read_leu16(&data))
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}
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2023-04-24 01:49:40 +00:00
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fn read_beu32(&mut self, clock: ClockTime, addr: Address) -> Result<u32, Error> {
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2021-10-27 00:33:23 +00:00
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let mut data = [0; 4];
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2023-04-24 01:49:40 +00:00
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self.read(clock, addr, &mut data)?;
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2021-10-27 00:33:23 +00:00
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Ok(read_beu32(&data))
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}
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2023-04-24 01:49:40 +00:00
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fn read_leu32(&mut self, clock: ClockTime, addr: Address) -> Result<u32, Error> {
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2021-11-03 03:33:27 +00:00
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let mut data = [0; 4];
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2023-04-24 01:49:40 +00:00
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self.read(clock, addr, &mut data)?;
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2021-11-03 03:33:27 +00:00
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Ok(read_leu32(&data))
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}
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2023-04-24 01:49:40 +00:00
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fn write_u8(&mut self, clock: ClockTime, addr: Address, value: u8) -> Result<(), Error> {
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let data = [value];
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self.write(clock, addr, &data)
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}
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2023-04-24 01:49:40 +00:00
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fn write_beu16(&mut self, clock: ClockTime, addr: Address, value: u16) -> Result<(), Error> {
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let mut data = [0; 2];
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write_beu16(&mut data, value);
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self.write(clock, addr, &data)
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}
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2023-04-24 01:49:40 +00:00
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fn write_leu16(&mut self, clock: ClockTime, addr: Address, value: u16) -> Result<(), Error> {
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let mut data = [0; 2];
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write_leu16(&mut data, value);
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self.write(clock, addr, &data)
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}
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2023-04-24 01:49:40 +00:00
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fn write_beu32(&mut self, clock: ClockTime, addr: Address, value: u32) -> Result<(), Error> {
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2021-11-03 03:33:27 +00:00
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let mut data = [0; 4];
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write_beu32(&mut data, value);
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self.write(clock, addr, &data)
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}
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2023-04-24 01:49:40 +00:00
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fn write_leu32(&mut self, clock: ClockTime, addr: Address, value: u32) -> Result<(), Error> {
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2021-11-03 03:33:27 +00:00
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let mut data = [0; 4];
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write_leu32(&mut data, value);
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self.write(clock, addr, &data)
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}
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}
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#[inline(always)]
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pub fn read_beu16(data: &[u8]) -> u16 {
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(data[0] as u16) << 8 |
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(data[1] as u16)
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}
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2021-11-03 03:33:27 +00:00
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#[inline(always)]
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pub fn read_leu16(data: &[u8]) -> u16 {
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(data[1] as u16) << 8 |
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(data[0] as u16)
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}
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2021-10-17 03:30:50 +00:00
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#[inline(always)]
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pub fn read_beu32(data: &[u8]) -> u32 {
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(data[0] as u32) << 24 |
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(data[1] as u32) << 16 |
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(data[2] as u32) << 8 |
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(data[3] as u32)
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}
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#[inline(always)]
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pub fn read_leu32(data: &[u8]) -> u32 {
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(data[3] as u32) << 24 |
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(data[2] as u32) << 16 |
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(data[1] as u32) << 8 |
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(data[0] as u32)
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}
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#[inline(always)]
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pub fn write_beu16(data: &mut [u8], value: u16) -> &mut [u8] {
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data[0] = (value >> 8) as u8;
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data[1] = value as u8;
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data
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}
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#[inline(always)]
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pub fn write_leu16(data: &mut [u8], value: u16) -> &mut [u8] {
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data[0] = value as u8;
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data[1] = (value >> 8) as u8;
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data
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}
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#[inline(always)]
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pub fn write_beu32(data: &mut [u8], value: u32) -> &mut [u8] {
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data[0] = (value >> 24) as u8;
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data[1] = (value >> 16) as u8;
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data[2] = (value >> 8) as u8;
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data[3] = value as u8;
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data
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2021-10-17 03:30:50 +00:00
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}
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#[inline(always)]
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pub fn write_leu32(data: &mut [u8], value: u32) -> &mut [u8] {
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data[0] = value as u8;
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data[1] = (value >> 8) as u8;
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data[2] = (value >> 16) as u8;
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data[3] = (value >> 24) as u8;
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data
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2021-10-17 03:30:50 +00:00
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}
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2021-10-26 19:17:59 +00:00
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2021-11-29 19:11:32 +00:00
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/// A device (cpu) that can debugged using the built-in debugger
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pub trait Debuggable {
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2021-12-21 03:53:12 +00:00
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fn debugging_enabled(&mut self) -> bool;
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fn set_debugging(&mut self, enable: bool);
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2021-11-29 19:11:32 +00:00
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fn add_breakpoint(&mut self, addr: Address);
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fn remove_breakpoint(&mut self, addr: Address);
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fn print_current_step(&mut self, system: &System) -> Result<(), Error>;
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fn print_disassembly(&mut self, addr: Address, count: usize);
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fn execute_command(&mut self, system: &System, args: &[&str]) -> Result<bool, Error>;
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}
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/// A device (peripheral) that can inspected using the built-in debugger
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pub trait Inspectable {
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fn inspect(&mut self, system: &System, args: &[&str]) -> Result<(), Error>;
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}
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2021-10-17 17:39:43 +00:00
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pub trait Transmutable {
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fn as_steppable(&mut self) -> Option<&mut dyn Steppable> {
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None
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}
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fn as_addressable(&mut self) -> Option<&mut dyn Addressable> {
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None
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}
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fn as_interruptable(&mut self) -> Option<&mut dyn Interruptable> {
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None
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}
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2021-10-26 19:17:59 +00:00
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fn as_debuggable(&mut self) -> Option<&mut dyn Debuggable> {
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None
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}
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2021-11-29 19:11:32 +00:00
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fn as_inspectable(&mut self) -> Option<&mut dyn Inspectable> {
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None
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}
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2021-10-17 17:39:43 +00:00
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}
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pub type TransmutableBox = Rc<RefCell<Box<dyn Transmutable>>>;
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pub fn wrap_transmutable<T: Transmutable + 'static>(value: T) -> TransmutableBox {
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Rc::new(RefCell::new(Box::new(value)))
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}
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2023-04-23 22:46:47 +00:00
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#[derive(Clone)]
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pub struct Device(TransmutableBox);
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impl Device {
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}
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2023-04-24 02:52:19 +00:00
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