forked from AbleOS/ableos
IDE: clean everything up
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8a1c77db58
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f993f6d7b9
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@ -6,11 +6,7 @@
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use core::panic::PanicInfo;
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use crate::{
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arch::gdt,
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println,
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rhai_shell::KEYBUFF,
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};
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use crate::{arch::gdt, println, rhai_shell::KEYBUFF};
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use cpuio::outb;
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use pic8259::ChainedPics;
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use qrcode::QrCode;
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@ -7,9 +7,9 @@
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use core::num::TryFromIntError;
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// FIXME: platform agnostic-ify these
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use x86_64::instructions::{port::Port, interrupts};
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use x86_64::structures::paging::{FrameAllocator, FrameDeallocator};
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use x86_64::instructions::{interrupts, port::Port};
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use x86_64::structures::paging::{mapper::MapToError, Mapper, Page, PhysFrame, Size4KiB};
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use x86_64::structures::paging::{FrameAllocator, FrameDeallocator};
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use x86_64::VirtAddr;
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use crate::arch::memory::BootInfoFrameAllocator;
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@ -21,6 +21,9 @@ use super::PciDeviceInfo;
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const PRDT_START: u64 = 0xffff_ffff_0000_0000;
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const BUFFER_START: u64 = 0xffff_ffff_0000_1000;
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/// ATA logical sector size, in bytes
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const SECTOR_SIZE: u16 = 512;
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/// Bus Master IDE Command
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const BMIC_OFFSET: u16 = 0;
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/// Bus Master IDE Status
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@ -251,7 +254,17 @@ impl PciIde {
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Ok(())
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}
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pub fn read(&mut self) -> Result<(), TryFromIntError> {
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pub fn read(
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&mut self,
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channel: Channel,
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drive: Drive,
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lba: u64,
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sector_count: u16,
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) -> Result<Vec<u8>, TryFromIntError> {
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// FIXME: make this an error
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assert!(lba < 0xFFFFFFFFFFFF);
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let byte_count = sector_count * SECTOR_SIZE;
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// prepare PRD table
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let prd = PRDT_START as *mut PhysRegionDescriptor;
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unsafe {
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@ -259,8 +272,7 @@ impl PciIde {
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.start_address()
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.as_u64()
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.try_into()?;
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// we want to read 512 bytes
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(*prd).byte_count = 512;
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(*prd).byte_count = byte_count;
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// this is the end of table
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(*prd).eot = 1 << 7;
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// this byte is reserved, we should probably set it to 0
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@ -268,40 +280,42 @@ impl PciIde {
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}
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unsafe {
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self.load_prdt(Channel::Primary);
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self.stop(Channel::Primary);
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self.set_read(Channel::Primary);
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self.clear_bmi_status(Channel::Primary);
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select_drive(Drive::Master, Channel::Primary);
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set_lba(Channel::Primary, 0, 1);
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ata_send_command(CMD_READ_DMA_EXT, Channel::Primary);
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self.start(Channel::Primary);
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self.load_prdt(channel);
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self.stop(channel);
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self.set_read(channel);
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self.clear_bmi_status(channel);
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select_drive(drive, channel);
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set_lba(channel, lba, sector_count);
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ata_send_command(CMD_READ_DMA_EXT, channel);
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self.start(channel);
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}
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loop {
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let status = self.bmi_status(Channel::Primary);
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trace!("read status: 0b{status:b}");
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loop {
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let status = unsafe { self.bmi_status(channel) };
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// Bit 2 (INT) set?
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if (status >> 2) & 1 == 1 {
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break;
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}
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}
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// FIXME: error handling
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// Stop DMA
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self.stop(Channel::Primary);
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// Clear the interrupt bit
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self.clear_bmi_status(Channel::Primary);
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for i in 0..512 {
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let addr = (BUFFER_START + i) as *mut u8;
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trace!("byte {i}: {}", *addr);
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// Bit 2 (INT) set?
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if (status >> 2) & 1 == 1 {
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break;
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}
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}
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Ok(())
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// FIXME: error handling
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unsafe {
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// Stop DMA
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self.stop(channel);
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// Clear the interrupt bit
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self.clear_bmi_status(channel);
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}
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let mut buffer = Vec::with_capacity(byte_count as usize);
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for i in 0..512 {
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let addr = (BUFFER_START + i) as *mut u8;
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buffer.push(unsafe { *addr });
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}
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Ok(buffer)
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}
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pub fn device_info(&self) -> PciDeviceInfo {
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@ -512,7 +526,7 @@ struct IdeDevice {
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}
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#[derive(Copy, Clone, Debug)]
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enum Channel {
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pub enum Channel {
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Primary,
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Secondary,
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}
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@ -524,7 +538,7 @@ impl Channel {
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}
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#[derive(Copy, Clone, Debug)]
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enum Drive {
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pub enum Drive {
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Master,
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Slave,
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}
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@ -6,6 +6,7 @@
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use crate::arch::drivers::sysinfo::master;
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use crate::arch::interrupts::{reset_pit_for_cpu, set_pit_2};
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use crate::devices::pci::ide::{Channel, Drive};
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use crate::devices::pci::{PciDevice, PCI_DEVICES};
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use crate::filesystem;
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use crate::filesystem::vfs::VFS;
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@ -113,7 +114,7 @@ pub fn scratchpad() {
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BANNER_WIDTH
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);
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let piix_ide_device = {
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let pci_ide_device = {
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let pci_devices = PCI_DEVICES.lock();
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pci_devices
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.iter()
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@ -127,10 +128,15 @@ pub fn scratchpad() {
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})
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.unwrap()
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};
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let mut piix_ide_device = piix_ide_device.lock();
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if let PciDevice::Ide(device) = &mut *piix_ide_device {
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device.read().unwrap()
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{
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let mut pci_ide_device = pci_ide_device.lock();
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if let PciDevice::Ide(device) = &mut *pci_ide_device {
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let first_sector = device.read(Channel::Primary, Drive::Master, 0, 1).unwrap();
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trace!("IDE Primary/Master sector 0: {first_sector:?}");
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}
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}
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real_shell();
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}
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