Sync/gnu-efi/lib/init.c
Curle d588e232c4 Major overhaul of this branch.
This branch has been dedicated to purely the UEFI bootloader.
As such, all other code has been removed.

This code can be compiled with Visual Studio, gcc or llvm.
2019-07-17 21:10:29 +01:00

215 lines
4.2 KiB
C

/*++
Copyright (c) 1998 Intel Corporation
Module Name:
Abstract:
Revision History
--*/
#include "lib.h"
VOID
EFIDebugVariable (
VOID
);
VOID
InitializeLib (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
/*++
Routine Description:
Initializes EFI library for use
Arguments:
Firmware's EFI system table
Returns:
None
--*/
{
EFI_LOADED_IMAGE *LoadedImage;
EFI_STATUS Status;
CHAR8 *LangCode;
if (!LibInitialized) {
LibInitialized = TRUE;
LibFwInstance = FALSE;
LibImageHandle = ImageHandle;
//
// Set up global pointer to the system table, boot services table,
// and runtime services table
//
ST = SystemTable;
BS = SystemTable->BootServices;
RT = SystemTable->RuntimeServices;
// ASSERT (CheckCrc(0, &ST->Hdr));
// ASSERT (CheckCrc(0, &BS->Hdr));
// ASSERT (CheckCrc(0, &RT->Hdr));
//
// Initialize pool allocation type
//
if (ImageHandle) {
Status = uefi_call_wrapper(
BS->HandleProtocol,
3,
ImageHandle,
&LoadedImageProtocol,
(VOID*)&LoadedImage
);
if (!EFI_ERROR(Status)) {
PoolAllocationType = LoadedImage->ImageDataType;
}
EFIDebugVariable ();
}
//
// Initialize Guid table
//
InitializeGuid();
InitializeLibPlatform(ImageHandle,SystemTable);
}
//
//
//
if (ImageHandle && UnicodeInterface == &LibStubUnicodeInterface) {
LangCode = LibGetVariable (VarLanguage, &EfiGlobalVariable);
InitializeUnicodeSupport (LangCode);
if (LangCode) {
FreePool (LangCode);
}
}
}
VOID
InitializeUnicodeSupport (
CHAR8 *LangCode
)
{
EFI_UNICODE_COLLATION_INTERFACE *Ui;
EFI_STATUS Status;
CHAR8 *Languages;
UINTN Index, Position, Length;
UINTN NoHandles;
EFI_HANDLE *Handles;
//
// If we don't know it, lookup the current language code
//
LibLocateHandle (ByProtocol, &UnicodeCollationProtocol, NULL, &NoHandles, &Handles);
if (!LangCode || !NoHandles) {
goto Done;
}
//
// Check all driver's for a matching language code
//
for (Index=0; Index < NoHandles; Index++) {
Status = uefi_call_wrapper(BS->HandleProtocol, 3, Handles[Index], &UnicodeCollationProtocol, (VOID*)&Ui);
if (EFI_ERROR(Status)) {
continue;
}
//
// Check for a matching language code
//
Languages = Ui->SupportedLanguages;
Length = strlena(Languages);
for (Position=0; Position < Length; Position += ISO_639_2_ENTRY_SIZE) {
//
// If this code matches, use this driver
//
if (CompareMem (Languages+Position, LangCode, ISO_639_2_ENTRY_SIZE) == 0) {
UnicodeInterface = Ui;
goto Done;
}
}
}
Done:
//
// Cleanup
//
if (Handles) {
FreePool (Handles);
}
}
VOID
EFIDebugVariable (
VOID
)
{
EFI_STATUS Status;
UINT32 Attributes;
UINTN DataSize;
UINTN NewEFIDebug;
DataSize = sizeof(EFIDebug);
Status = uefi_call_wrapper(RT->GetVariable, 5, L"EFIDebug", &EfiGlobalVariable, &Attributes, &DataSize, &NewEFIDebug);
if (!EFI_ERROR(Status)) {
EFIDebug = NewEFIDebug;
}
}
/*
* Calls to memset/memcpy may be emitted implicitly by GCC or MSVC
* even when -ffreestanding or /NODEFAULTLIB are in effect.
*/
#ifndef __SIZE_TYPE__
#define __SIZE_TYPE__ UINTN
#endif
void *memset(void *s, int c, __SIZE_TYPE__ n)
{
unsigned char *p = s;
while (n--)
*p++ = c;
return s;
}
void *memcpy(void *dest, const void *src, __SIZE_TYPE__ n)
{
const unsigned char *q = src;
unsigned char *p = dest;
while (n--)
*p++ = *q++;
return dest;
}