z8
97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
// https://blog.fpmurphy.com/2015/01/list-acpi-tables-from-uefi-shell.html
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// Copyright (c) 2015 Finnbarr P. Murphy. All rights reserved.
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// Display list of ACPI tables
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// License: BSD License
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#include <efi.h>
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#include <efilib.h>
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#include "listacpi.h"
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UINTN
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myStrnCmpA(CHAR8* s1, CHAR8* s2, UINTN len)
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{
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while (*s1 && len) {
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if (*s1 != *s2) {
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break;
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}
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s1 += 1;
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s2 += 1;
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len -= 1;
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}
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return len ? *s1 - *s2 : 0;
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}
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VOID
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Ascii2UnicodeStr(CHAR8* String, CHAR16* UniString, UINT8 length)
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{
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int len = length;
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while (*String != '\0' && len > 0) {
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*(UniString++) = (CHAR16) * (String++);
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len--;
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}
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*UniString = '\0';
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}
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int
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ParseRSDP(EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER* Rsdp, CHAR16* GuidStr)
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{
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EFI_ACPI_SDT_HEADER* Xsdt, * Entry;
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CHAR16 SigStr[20], OemStr[20];
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UINT32 EntryCount;
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UINT64* EntryPtr;
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int Index;
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Print(L"\n\nACPI GUID: %s\n", GuidStr);
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Ascii2UnicodeStr((CHAR8*)(Rsdp->OemId), OemStr, 6);
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Print(L"\nFound RSDP. Version: %d OEM ID: %s\n", (int)(Rsdp->Revision), OemStr);
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if (Rsdp->Revision >= EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER_REVISION) {
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Xsdt = (EFI_ACPI_SDT_HEADER*)(Rsdp->XsdtAddress);
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}
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else {
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Print(L"ERROR: No XSDT table found.\n");
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return 1;
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}
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if (myStrnCmpA("XSDT", (CHAR8*)(VOID*)(Xsdt->Signature), 4)) {
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Print(L"ERROR: Invalid XSDT table found.\n");
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return 1;
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}
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Ascii2UnicodeStr((CHAR8*)(Xsdt->OemId), OemStr, 6);
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EntryCount = (Xsdt->Length - sizeof(EFI_ACPI_SDT_HEADER)) / sizeof(UINT64);
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Print(L"Found XSDT. OEM ID: %s Entry Count: %d\n\n", OemStr, EntryCount);
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EntryPtr = (UINT64*)(Xsdt + 1);
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for (Index = 0; Index < EntryCount; Index++, EntryPtr++) {
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Entry = (EFI_ACPI_SDT_HEADER*)((UINTN)(*EntryPtr));
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Ascii2UnicodeStr((CHAR8*)(Entry->Signature), SigStr, 4);
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Ascii2UnicodeStr((CHAR8*)(Entry->OemId), OemStr, 6);
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Print(L"Found ACPI table: %s Version: %d OEM ID: %s\n", SigStr, (int)(Entry->Revision), OemStr);
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}
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return 0;
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}
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VOID
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Guid2String(CHAR16* Buffer, EFI_GUID* Guid)
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{
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SPrint(Buffer, 0, L"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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Guid->Data1,
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Guid->Data2,
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Guid->Data3,
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Guid->Data4[0],
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Guid->Data4[1],
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Guid->Data4[2],
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Guid->Data4[3],
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Guid->Data4[4],
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Guid->Data4[5],
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Guid->Data4[6],
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Guid->Data4[7]);
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}
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