blob: 1bc475de2b2ad237a2787e79a8c91b777fde41d3 (
plain)
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
|
#include "devices/storage/RAMDisk/RAMDiskDevice.hpp"
#include "kapi/boot_module/boot_module.hpp"
#include "kapi/system.hpp"
#include "devices/BlockDevice.hpp"
#include <kstd/cstring>
#include <cstddef>
namespace devices::storage::ram_disk
{
ram_disk_device::ram_disk_device() // TODO BA-FS26 remove when kstd::vector is available
: block_device(0, 0)
{}
ram_disk_device::ram_disk_device(kapi::boot_modules::boot_module const & module, size_t major, size_t minor)
: block_device(major, minor)
, m_boot_module(module)
{}
auto ram_disk_device::read_block(size_t block_index, void * buffer) const -> void
{
if (buffer == nullptr)
{
kapi::system::panic("[RAM DISK DEVICE] read_block called with null buffer.");
}
// TODO BA-FS26 add bounds checking based on module size?
// TODO BA-FS26 fill with 0 after the end of the module, if the block extends beyond it?
auto const offset = block_index * block_size;
auto const source = static_cast<std::byte *>(m_boot_module.start_address) + offset;
kstd::libc::memcpy(buffer, source, block_size);
}
auto ram_disk_device::write_block(size_t block_index, void const * buffer) -> void
{
if (buffer == nullptr)
{
kapi::system::panic("[RAM DISK DEVICE] write_block called with null buffer.");
}
// TODO BA-FS26 add bounds checking based on module size?
// TODO BA-FS26 ignore writes beyond the end of the module?
auto const offset = block_index * block_size;
auto const destination = static_cast<std::byte *>(m_boot_module.start_address) + offset;
kstd::libc::memcpy(destination, buffer, block_size);
}
} // namespace devices::storage::ram_disk
|
