able/vga
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Allow virtual address to be changed

Browse source
This commit is contained in:
Ryan Kennedy 2020-04-12 18:48:33 -05:00
parent 4e3460a273
commit ed2fdb74a1
1 changed files with 13 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
src/devices/bochs.rs
View file

@ -1,5 +1,5 @@
use super::pci::{find_pci_device, PciDevice, PciHeader};
use x86_64::instructions::port::Port;
use x86_64::{instructions::port::Port, PhysAddr, VirtAddr};
const BOCHS_ID: u32 = 0x1111_1234;
const BOCHS_INDEX_PORT_ADDRESS: u16 = 0x01CE;
@ -14,7 +14,6 @@ const VBE_DISPI_DISABLED: u16 = 0x00;
const VBE_DISPI_ENABLED: u16 = 0x01;
const VBE_DISPI_GETCAPS: u16 = 0x02;
const VBE_DISPI_LFB_ENABLED: u16 = 0x40;
const VBE_DISPI_NOCLEARMEM: u16 = 0x80;
#[derive(Debug, Copy, Clone)]
#[repr(u8)]
@ -66,8 +65,8 @@ pub struct BochsDevice {
index_port: Port<u16>,
data_port: Port<u16>,
pci_device: PciDevice,
physical_address: u32,
virtual_address: u64,
physical_address: PhysAddr,
virtual_address: VirtAddr,
}
impl BochsDevice {
@ -75,10 +74,11 @@ impl BochsDevice {
if let Some(pci_device) = find_pci_device(BOCHS_ID) {
let index_port = Port::new(BOCHS_INDEX_PORT_ADDRESS);
let data_port = Port::new(BOCHS_DATA_PORT_ADDRESS);
let physical_address = match pci_device.pci_header {
let base_address = match pci_device.pci_header {
PciHeader::PciHeaderType0 { base_addresses, .. } => base_addresses[0] & 0xFFFF_FFF0,
};
let virtual_address = physical_address as u64;
let physical_address = PhysAddr::new(base_address as u64);
let virtual_address = VirtAddr::new(base_address as u64);
Some(BochsDevice {
pci_device,
index_port,
@ -91,14 +91,18 @@ impl BochsDevice {
}
}
pub fn physical_address(&self) -> u32 {
pub fn physical_address(&self) -> PhysAddr {
self.physical_address
}
pub fn virtual_address(&self) -> u64 {
pub fn virtual_address(&self) -> VirtAddr {
self.virtual_address
}
pub fn set_virtual_address(&mut self, virtual_address: VirtAddr) {
self.virtual_address = virtual_address;
}
pub fn capabilities(&mut self) -> Capabilities {
unsafe {
// Save original value of VBE_DISPI_INDEX_ENABLE
@ -137,7 +141,7 @@ impl BochsDevice {
unsafe {
self.index_port.write(VBE_DISPI_INDEX_ENABLE);
self.data_port
.write(VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED | VBE_DISPI_NOCLEARMEM);
.write(VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
}
}