1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
#pragma once
#include <AK/RetainPtr.h>
#include <Kernel/Devices/DiskDevice.h>
#include <Kernel/IRQHandler.h>
#include <Kernel/Lock.h>
#include <Kernel/PCI.h>
#include <Kernel/PhysicalAddress.h>
#include <Kernel/VM/PhysicalPage.h>
struct PhysicalRegionDescriptor {
PhysicalAddress offset;
word size { 0 };
word end_of_table { 0 };
};
class IDEDiskDevice final : public IRQHandler
, public DiskDevice {
AK_MAKE_ETERNAL
public:
static NonnullRefPtr<IDEDiskDevice> create();
virtual ~IDEDiskDevice() override;
// ^DiskDevice
virtual unsigned block_size() const override;
virtual bool read_block(unsigned index, byte*) const override;
virtual bool write_block(unsigned index, const byte*) override;
virtual bool read_blocks(unsigned index, word count, byte*) override;
virtual bool write_blocks(unsigned index, word count, const byte*) override;
protected:
IDEDiskDevice();
private:
// ^IRQHandler
virtual void handle_irq() override;
// ^DiskDevice
virtual const char* class_name() const override;
void initialize();
bool wait_for_irq();
bool read_sectors_with_dma(dword lba, word count, byte*);
bool write_sectors_with_dma(dword lba, word count, const byte*);
bool read_sectors(dword lba, word count, byte* buffer);
bool write_sectors(dword lba, word count, const byte* data);
Lock m_lock { "IDEDiskDevice" };
word m_cylinders { 0 };
word m_heads { 0 };
word m_sectors_per_track { 0 };
word m_io_base { 0 };
volatile bool m_interrupted { false };
volatile byte m_device_error { 0 };
PCI::Address m_pci_address;
PhysicalRegionDescriptor m_prdt;
RefPtr<PhysicalPage> m_dma_buffer_page;
word m_bus_master_base { 0 };
Lockable<bool> m_dma_enabled;
};
|
