Initial commit

2023-10-29 16:42:16 +01:00
commit 4ede0f9eb0
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+// https://blog.fpmurphy.com/2015/01/list-acpi-tables-from-uefi-shell.html
+// Copyright (c) 2015  Finnbarr P. Murphy. All rights reserved.
+// Display list of ACPI tables 
+// License: BSD License
+
+#include <efi.h>
+#include <efilib.h>
+#include "listacpi.h"
+
+UINTN
+myStrnCmpA(CHAR8* s1, CHAR8* s2, UINTN len)
+{
+    while (*s1 && len) {
+        if (*s1 != *s2) {
+            break;
+        }
+        s1 += 1;
+        s2 += 1;
+        len -= 1;
+    }
+
+    return len ? *s1 - *s2 : 0;
+}
+
+
+VOID
+Ascii2UnicodeStr(CHAR8* String, CHAR16* UniString, UINT8 length)
+{
+    int len = length;
+
+    while (*String != '\0' && len > 0) {
+        *(UniString++) = (CHAR16) * (String++);
+        len--;
+    }
+    *UniString = '\0';
+}
+
+
+int
+ParseRSDP(EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER* Rsdp, CHAR16* GuidStr)
+{
+    EFI_ACPI_SDT_HEADER* Xsdt, * Entry;
+    CHAR16 SigStr[20], OemStr[20];
+    UINT32 EntryCount;
+    UINT64* EntryPtr;
+    int Index;
+
+    Print(L"\n\nACPI GUID: %s\n", GuidStr);
+    Ascii2UnicodeStr((CHAR8*)(Rsdp->OemId), OemStr, 6);
+    Print(L"\nFound RSDP. Version: %d  OEM ID: %s\n", (int)(Rsdp->Revision), OemStr);
+
+    if (Rsdp->Revision >= EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER_REVISION) {
+        Xsdt = (EFI_ACPI_SDT_HEADER*)(Rsdp->XsdtAddress);
+    }
+    else {
+        Print(L"ERROR: No XSDT table found.\n");
+        return 1;
+    }
+
+    if (myStrnCmpA("XSDT", (CHAR8*)(VOID*)(Xsdt->Signature), 4)) {
+        Print(L"ERROR: Invalid XSDT table found.\n");
+        return 1;
+    }
+
+    Ascii2UnicodeStr((CHAR8*)(Xsdt->OemId), OemStr, 6);
+    EntryCount = (Xsdt->Length - sizeof(EFI_ACPI_SDT_HEADER)) / sizeof(UINT64);
+    Print(L"Found XSDT. OEM ID: %s  Entry Count: %d\n\n", OemStr, EntryCount);
+
+    EntryPtr = (UINT64*)(Xsdt + 1);
+    for (Index = 0; Index < EntryCount; Index++, EntryPtr++) {
+        Entry = (EFI_ACPI_SDT_HEADER*)((UINTN)(*EntryPtr));
+        Ascii2UnicodeStr((CHAR8*)(Entry->Signature), SigStr, 4);
+        Ascii2UnicodeStr((CHAR8*)(Entry->OemId), OemStr, 6);
+        Print(L"Found ACPI table: %s  Version: %d  OEM ID: %s\n", SigStr, (int)(Entry->Revision), OemStr);
+    }
+
+    return 0;
+}
+
+
+VOID
+Guid2String(CHAR16* Buffer, EFI_GUID* Guid)
+{
+    SPrint(Buffer, 0, L"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+        Guid->Data1,
+        Guid->Data2,
+        Guid->Data3,
+        Guid->Data4[0],
+        Guid->Data4[1],
+        Guid->Data4[2],
+        Guid->Data4[3],
+        Guid->Data4[4],
+        Guid->Data4[5],
+        Guid->Data4[6],
+        Guid->Data4[7]);
+}