CloverBootloader/MemoryFix/OsxAptioFixDrv/NVRAMDebug.c

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/**
NVRAM debug stuff.
by dmazar
**/
#include <Library/UefiLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/DebugLib.h>
#include <Library/PrintLib.h>
#include "NVRAMDebug.h"
// DBG_TO: 0=no debug, 1=serial, 2=console
// serial requires
// [PcdsFixedAtBuild]
// gEfiMdePkgTokenSpaceGuid.PcdDebugPropertyMask|0x07
// gEfiMdePkgTokenSpaceGuid.PcdDebugPrintErrorLevel|0xFFFFFFFF
// in package DSC file
#define DBG_TO 0
#if DBG_TO == 2
#define DBG(...) AsciiPrint(__VA_ARGS__);
#elif DBG_TO == 1
#define DBG(...) DebugPrint(1, __VA_ARGS__);
#else
#define DBG(...)
#endif
// NVRAM var guid.
EFI_GUID gEfiNVRAMDebugVarGuid = DEBUG_LOG_NVRAM_VAR_GUID;
// Debug log buffer.
CHAR8 DebugLogBuffer[DEBUG_LOG_SIZE];
// Pointer to the current end (beginning of a free space) of the log in the buffer.
CHAR8 *DebugLogBufferPtr = NULL;
/** Appends given data to the log and writes it to NVRAM variable. */
EFI_STATUS EFIAPI
NVRAMDebugLog(CHAR8 *Format, ...)
{
EFI_STATUS Status;
VA_LIST Marker;
UINTN DataSize;
UINTN DataWritten;
if (DebugLogBufferPtr == NULL) {
// init pointer to the buffer start
DebugLogBufferPtr = DebugLogBuffer;
}
DataSize = DEBUG_LOG_SIZE - (DebugLogBufferPtr - DebugLogBuffer);
if (DataSize < 2) {
return EFI_BUFFER_TOO_SMALL;
}
// add text to buffer
VA_START (Marker, Format);
DataWritten = AsciiVSPrint(DebugLogBufferPtr, DataSize, Format, Marker);
VA_END (Marker);
DebugLogBufferPtr += DataWritten;
// delete prev value
//Status = gRT->SetVariable(L"DebugLog", &gEfiNVRAMDebugVarGuid,
// EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_NON_VOLATILE,
// 0, DebugLogBuffer);
// write new value
Status = gRT->SetVariable(
DEBUG_LOG_NVRAM_VAR_NAME,
&gEfiNVRAMDebugVarGuid,
EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_NON_VOLATILE,
DebugLogBufferPtr - DebugLogBuffer,
DebugLogBuffer
);
return Status;
}