:boom: See below.

HCoreLdr: Start effort to load HCoreKrnl in case of a non-installer
scenario.
HCoreKrnl: Start working on disk abstraction (AHCI) and rework PE format
header file.

Signed-off-by: Amlal El Mahrouss <amlalelmahrouss@icloud.com>

5 files changed, 122 insertions, 0 deletions

diff --git a/Private/Drivers/ACPI/.gitkeep b/Private/Drivers/ACPI/.gitkeep
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/Private/Drivers/ACPI/.gitkeep
diff --git a/Private/Drivers/ACPI/ACPI.hpp b/Private/Drivers/ACPI/ACPI.hpp
new file mode 100644
index 00000000..1a4329fc
--- /dev/null
+++ b/Private/Drivers/ACPI/ACPI.hpp
@@ -0,0 +1,67 @@
+/* -------------------------------------------
+
+    Copyright Mahrouss Logic
+
+------------------------------------------- */
+
+#ifndef __ACPI__
+#define __ACPI__
+
+/**
+    https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html
+    https://wiki.osdev.org/RSDT
+*/
+
+#include <NewKit/Defines.hpp>
+
+namespace HCore {
+class SDT {
+ public:
+  Char Signature[4];
+  UInt32 Length;
+  UInt8 Revision;
+  Char Checksum;
+  Char OemId[6];
+  Char OemTableId[8];
+  UInt32 OemRev;
+  UInt32 CreatorID;
+  UInt32 CreatorRevision;
+};
+
+class RSDP : public SDT {
+ public:
+  UInt32 RsdtAddress;
+  UIntPtr XsdtAddress;
+  UInt8 ExtendedChecksum;
+  UInt8 Reserved0[3];
+};
+
+class ConfigHeader {
+ public:
+  UInt64 BaseAddress;
+  UInt16 PciSegGroup;
+  UInt8 StartBus;
+  UInt8 EndBus;
+  UInt32 Reserved;
+};
+
+enum class AddressSpace : UInt8 {
+  SystemMemory = 0,
+  SystemIO = 1,
+  Pci = 2,
+  Controller = 3,
+  SmBus = 4,
+  Invalid = 0xFF,
+};
+
+class Address {
+ public:
+  AddressSpace AddressSpaceId;
+  UInt8 RegisterBitWidth;
+  UInt8 RegisterBitOffset;
+  UInt8 Reserved;
+  UIntPtr Address;
+};
+}  // namespace HCore
+
+#endif  // !__ACPI__
diff --git a/Private/Drivers/ACPI/ACPIManager.hxx b/Private/Drivers/ACPI/ACPIManager.hxx
new file mode 100644
index 00000000..dc3dd573
--- /dev/null
+++ b/Private/Drivers/ACPI/ACPIManager.hxx
@@ -0,0 +1,44 @@
+/* -------------------------------------------
+
+    Copyright Mahrouss Logic
+
+------------------------------------------- */
+
+#ifndef __ACPI_MANAGER__
+#define __ACPI_MANAGER__
+
+#include <Drivers/ACPI/ACPI.hpp>
+#include <KernelKit/DebugOutput.hpp>
+#include <NewKit/Defines.hpp>
+#include <NewKit/Ref.hpp>
+
+namespace HCore {
+class ACPIManager final {
+ public:
+  explicit ACPIManager(voidPtr rsdptr);
+  ~ACPIManager() = default;
+
+  ACPIManager &operator=(const ACPIManager &) = default;
+  ACPIManager(const ACPIManager &) = default;
+
+ public:
+  void Shutdown();  // shutdown
+  void Reset();     // soft-reboot
+
+  ErrorOr<voidPtr> Find(const char *signature);
+
+  bool Checksum(const char *checksum, SSizeT len);  // watch for collides!
+
+ public:
+  ErrorOr<voidPtr> operator[](const char *signature) {
+    return this->Find(signature);
+  }
+
+ private:
+  VoidPtr m_Rsdp;    // pointer to root descriptor.
+  SSizeT m_Entries;  // number of entries, -1 tells that no invalid entries were
+                     // found.
+};
+}  // namespace HCore
+
+#endif  // !__ACPI_MANAGER__
diff --git a/Private/Drivers/ACPI/compile_flags.txt b/Private/Drivers/ACPI/compile_flags.txt
new file mode 100644
index 00000000..1bc51142
--- /dev/null
+++ b/Private/Drivers/ACPI/compile_flags.txt
@@ -0,0 +1,4 @@
+-I./
+-I../
+-I../../
+-std=c++20
diff --git a/Private/Drivers/AHCI/API.hxx b/Private/Drivers/AHCI/API.hxx
index 8b137891..2a02b434 100644
--- a/Private/Drivers/AHCI/API.hxx
+++ b/Private/Drivers/AHCI/API.hxx
@@ -1 +1,8 @@
+/* -------------------------------------------
+
+    Copyright Mahrouss Logic
+
+------------------------------------------- */
+
+#pragma once