Implementation acpi tables through structs

1 files changed, 101 insertions, 0 deletions

diff --git a/drivers/acpi/acpi.h b/drivers/acpi/acpi.h
new file mode 100644
index 0000000..28221d7
--- /dev/null
+++ b/drivers/acpi/acpi.h
@@ -0,0 +1,101 @@
+#include <types.h>
+#include <StringOperations.h>
+
+
+typedef decltype(nullptr) nulltype;
+
+struct descHeader
+{
+    char signature[4];
+    uint32 length;
+    uint8 revision;
+    uint8 checksum;
+    char oemId[6];
+    uint64 oemTableId;
+    uint32 oemRevision;
+    uint32 creatorId;
+    uint32 creatorRevision;
+} __attribute__((packed));
+
+struct rsdt
+{
+    descHeader header;
+    uint32 firstEntryAddr;
+} __attribute__((packed, aligned(sizeof(uint32))));
+
+struct xsdt
+{
+    descHeader header;
+    uint64 firstEntryAddr;
+} __attribute__((packed, aligned(sizeof(uint32))));
+
+struct rsdp
+{
+    char signature[8];
+    uint8 checksum;
+    char oemId[6];
+    uint8 revision;
+    uint32 rsdtAddress;
+    uint32 length;
+    uint32 xsdtAddress;
+    uint8 extendedChecksum;
+    char reserved[3];
+} __attribute__((packed));
+
+class DescriptorTable
+{
+
+};
+
+class Entry
+{
+    private:
+        uint32 sizeHeadersInBytes;
+        const struct descHeader **headers;
+        // DescriptorTable &tables;
+    public:
+        Entry() = delete;
+        Entry(const uint32 sizeEntriesBytes, const uint32 *entryAddress);
+        Entry(const nulltype null);
+};
+
+class Rsdt
+{
+    private:
+        const struct rsdt* rsdtStruct;
+        Entry entry;
+    public:
+        Rsdt() = delete;
+        Rsdt(const uint32 addr);
+        Rsdt(const nulltype null);
+        const Entry& getEntries();
+};
+
+class Xsdt
+{
+    private:
+        const struct xsdt* xsdtStruct;
+    public:
+        Xsdt() = delete;
+        Xsdt(const uint32 addr);
+        Xsdt(const nulltype null);
+};
+
+class Rsdp
+{
+    private:
+        const uint8 validFieldRevision = 2;
+        // RSDP memory address areas in IA-PC systems
+        const char *rsdpSign = "RSD PTR ";
+        const MemArea rsdpRomMemArea = MemArea(0xe0000, 0xfffff);
+        const MemArea rsdpEbdaMemArea = MemArea(0x80000, 0x803ff);
+
+        const struct rsdp *rsdpStruct;
+        Rsdt rsdtObj;
+        Xsdt xsdtObj;
+    public:
+        Rsdp();
+        const Rsdt *getRsdt() const;
+        const Xsdt *getXsdt() const;
+
+};