implement first draft of RAMDiskDevice

1 files changed, 33 insertions, 1 deletions

diff --git a/kernel/devices/src/storage/RAMDisk/RAMDiskDevice.cpp b/kernel/devices/src/storage/RAMDisk/RAMDiskDevice.cpp
index 8d8f51e..1e650d8 100644
--- a/kernel/devices/src/storage/RAMDisk/RAMDiskDevice.cpp
+++ b/kernel/devices/src/storage/RAMDisk/RAMDiskDevice.cpp
@@ -1,6 +1,38 @@
 #include "devices/storage/RAMDisk/RAMDiskDevice.hpp"
 
+#include "kapi/memory.hpp"
+#include "kapi/system.hpp"
+
+#include <kstd/print>
+
+#include <cstddef>
+
 namespace devices::storage::ram_disk
 {
-  // TODO BA-FS26 implement ram disk device functionality
+  ram_disk_device::ram_disk_device(kapi::memory::linear_address data_start, size_t data_size)
+      : m_data_start(data_start)
+      , m_data_size(data_size)
+  {}
+
+  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.");
+    // }
+
+    auto const offset = block_index * block_size;
+    if (offset + block_size >
+        m_data_size)  // TODO BA-FS26 really correct, what if block_size doesn't divide m_data_size?
+    {
+      kapi::system::panic("[RAM DISK DEVICE] read_block out of bounds.");
+    }
+
+    auto const source = static_cast<std::byte *>(m_data_start) + offset;
+    for (size_t i = 0; i < block_size; ++i)
+    {
+      kstd::println("address: {}, value: {}", source + i, std::to_integer<unsigned int>(*(source + i)));
+    }
+    // std::memcpy(buffer, source, block_size);
+  }
 }  // namespace devices::storage::ram_disk
\ No newline at end of file