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audk/ArmPlatformPkg/Bds/BdsEntry.c

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/** @file
*
* Copyright (c) 2011, ARM Limited. All rights reserved.
*
* This program and the accompanying materials
* are licensed and made available under the terms and conditions of the BSD License
* which accompanies this distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
**/
#include <PiDxe.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiLib.h>
#include <Library/PerformanceLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/PcdLib.h>
#include <Library/BdsUnixLib.h>
#include <Protocol/Bds.h>
#include <Protocol/DevicePathToText.h>
#include <Guid/GlobalVariable.h>
#define MAX_CMD_LINE 256
VOID
EFIAPI
BdsEntry (
IN EFI_BDS_ARCH_PROTOCOL *This
);
EFI_HANDLE mBdsImageHandle = NULL;
EFI_BDS_ARCH_PROTOCOL gBdsProtocol = {
BdsEntry,
};
EFI_STATUS GetEnvironmentVariable (
IN CONST CHAR16* VariableName,
IN VOID* DefaultValue,
IN UINTN DefaultSize,
OUT VOID** Value)
{
EFI_STATUS Status;
UINTN Size;
// Try to get the variable size.
*Value = NULL;
Size = 0;
Status = gRT->GetVariable ((CHAR16 *) VariableName, &gEfiGlobalVariableGuid, NULL, &Size, *Value);
if (Status == EFI_NOT_FOUND) {
// If the environment variable does not exist yet then set it with the default value
Status = gRT->SetVariable (
(CHAR16*)VariableName,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
DefaultSize,
DefaultValue
);
*Value = DefaultValue;
} else if (Status == EFI_BUFFER_TOO_SMALL) {
// Get the environment variable value
*Value = AllocatePool (Size);
if (*Value == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = gRT->GetVariable ((CHAR16 *)VariableName, &gEfiGlobalVariableGuid, NULL, &Size, *Value);
if (EFI_ERROR (Status)) {
FreePool(*Value);
return EFI_INVALID_PARAMETER;
}
} else {
*Value = DefaultValue;
return Status;
}
return EFI_SUCCESS;
}
EFI_STATUS
InitializeConsole (
VOID
)
{
EFI_STATUS Status;
UINTN NoHandles;
EFI_HANDLE *Buffer;
BOOLEAN AllDriversConnected;
AllDriversConnected = FALSE;
//
// Now we need to setup the EFI System Table with information about the console devices.
// This code is normally in the console spliter driver on platforms that support multiple
// consoles at the same time
//
Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiSimpleTextOutProtocolGuid, NULL, &NoHandles, &Buffer);
if (EFI_ERROR (Status)) {
BdsConnectAllDrivers();
AllDriversConnected = TRUE;
Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiSimpleTextOutProtocolGuid, NULL, &NoHandles, &Buffer);
}
if (!EFI_ERROR (Status)) {
// Use the first SimpleTextOut we find and update the EFI System Table
gST->ConsoleOutHandle = Buffer[0];
gST->StandardErrorHandle = Buffer[0];
Status = gBS->HandleProtocol (Buffer[0], &gEfiSimpleTextOutProtocolGuid, (VOID **)&gST->ConOut);
ASSERT_EFI_ERROR (Status);
gST->StdErr = gST->ConOut;
FreePool (Buffer);
} else {
return Status;
}
Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiSimpleTextInProtocolGuid, NULL, &NoHandles, &Buffer);
if (EFI_ERROR (Status) && !AllDriversConnected) {
BdsConnectAllDrivers();
Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiSimpleTextInProtocolGuid, NULL, &NoHandles, &Buffer);
}
if (!EFI_ERROR (Status)) {
// Use the first SimpleTextIn we find and update the EFI System Table
gST->ConsoleInHandle = Buffer[0];
Status = gBS->HandleProtocol (Buffer[0], &gEfiSimpleTextInProtocolGuid, (VOID **)&gST->ConIn);
ASSERT_EFI_ERROR (Status);
FreePool (Buffer);
} else {
return Status;
}
return EFI_SUCCESS;
}
EFI_STATUS
GetHIInputAscii (
CHAR8 *CmdLine,
UINTN MaxCmdLine
) {
UINTN CmdLineIndex;
UINTN WaitIndex;
CHAR8 Char;
EFI_INPUT_KEY Key;
EFI_STATUS Status;
CmdLine[0] = '\0';
for (CmdLineIndex = 0; CmdLineIndex < MaxCmdLine; ) {
Status = gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &WaitIndex);
ASSERT_EFI_ERROR (Status);
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
ASSERT_EFI_ERROR (Status);
Char = (CHAR8)Key.UnicodeChar;
if ((Char == '\n') || (Char == '\r') || (Char == 0x7f)) {
CmdLine[CmdLineIndex] = '\0';
AsciiPrint ("\n");
return EFI_SUCCESS;
} else if ((Char == '\b') || (Key.ScanCode == SCAN_LEFT) || (Key.ScanCode == SCAN_DELETE)){
if (CmdLineIndex != 0) {
CmdLineIndex--;
AsciiPrint ("\b \b");
}
} else {
CmdLine[CmdLineIndex++] = Char;
AsciiPrint ("%c", Char);
}
}
return EFI_SUCCESS;
}
VOID
ListDevicePaths (
IN BOOLEAN AllDrivers
) {
EFI_STATUS Status;
UINTN HandleCount;
EFI_HANDLE *HandleBuffer;
UINTN Index;
EFI_DEVICE_PATH_PROTOCOL* DevicePathProtocol;
CHAR16* String;
EFI_DEVICE_PATH_TO_TEXT_PROTOCOL* EfiDevicePathToTextProtocol;
if (AllDrivers) {
BdsConnectAllDrivers();
}
Status = gBS->LocateProtocol(&gEfiDevicePathToTextProtocolGuid, NULL, (VOID **)&EfiDevicePathToTextProtocol);
if (EFI_ERROR (Status)) {
AsciiPrint ("Did not find the DevicePathToTextProtocol.\n");
return;
}
Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiDevicePathProtocolGuid, NULL, &HandleCount, &HandleBuffer);
if (EFI_ERROR (Status)) {
AsciiPrint ("No device path found\n");
return;
}
for (Index = 0; Index < HandleCount; Index++) {
Status = gBS->HandleProtocol (HandleBuffer[Index], &gEfiDevicePathProtocolGuid, (VOID **)&DevicePathProtocol);
String = EfiDevicePathToTextProtocol->ConvertDevicePathToText(DevicePathProtocol,TRUE,TRUE);
Print (L"\t- [%d] %s\n",Index, String);
}
}
INTN BdsComparefile (
IN CHAR16 *DeviceFilePath1,
IN CHAR16 *DeviceFilePath2,
VOID **FileImage1,VOID **FileImage2,UINTN* FileSize
);
/**
This function uses policy data from the platform to determine what operating
system or system utility should be loaded and invoked. This function call
also optionally make the use of user input to determine the operating system
or system utility to be loaded and invoked. When the DXE Core has dispatched
all the drivers on the dispatch queue, this function is called. This
function will attempt to connect the boot devices required to load and invoke
the selected operating system or system utility. During this process,
additional firmware volumes may be discovered that may contain addition DXE
drivers that can be dispatched by the DXE Core. If a boot device cannot be
fully connected, this function calls the DXE Service Dispatch() to allow the
DXE drivers from any newly discovered firmware volumes to be dispatched.
Then the boot device connection can be attempted again. If the same boot
device connection operation fails twice in a row, then that boot device has
failed, and should be skipped. This function should never return.
@param This The EFI_BDS_ARCH_PROTOCOL instance.
@return None.
**/
VOID
EFIAPI
BdsEntry (
IN EFI_BDS_ARCH_PROTOCOL *This
)
{
EFI_STATUS Status;
CHAR8 CmdLine[MAX_CMD_LINE];
VOID* DefaultVariableValue;
UINTN DefaultVariableSize;
CHAR16 *LinuxKernelDP;
CHAR8 *LinuxAtag;
CHAR16 *FdtDP;
PERF_END (NULL, "DXE", NULL, 0);
PERF_START (NULL, "BDS", NULL, 0);
Status = InitializeConsole();
ASSERT_EFI_ERROR(Status);
while (1) {
// Get the Linux Kernel Device Path from Environment Variable
DefaultVariableValue = (VOID*)PcdGetPtr(PcdLinuxKernelDP);
DefaultVariableSize = StrSize((CHAR16*)DefaultVariableValue);
GetEnvironmentVariable(L"LinuxKernelDP",DefaultVariableValue,DefaultVariableSize,(VOID**)&LinuxKernelDP);
// Get the Linux ATAG from Environment Variable
DefaultVariableValue = (VOID*)PcdGetPtr(PcdLinuxAtag);
DefaultVariableSize = AsciiStrSize((CHAR8*)DefaultVariableValue);
GetEnvironmentVariable(L"LinuxAtag",DefaultVariableValue,DefaultVariableSize,(VOID**)&LinuxAtag);
// Get the FDT Device Path from Environment Variable
DefaultVariableValue = (VOID*)PcdGetPtr(PcdFdtDP);
DefaultVariableSize = StrSize((CHAR16*)DefaultVariableValue);
GetEnvironmentVariable(L"FdtDP",DefaultVariableValue,DefaultVariableSize,(VOID**)&FdtDP);
AsciiPrint ("1. Start EBL\n\r");
AsciiPrint ("2. List Device Paths of all the drivers\n");
AsciiPrint ("3. Start Linux\n");
Print (L"\t- Kernel: %s\n", LinuxKernelDP);
AsciiPrint ("\t- Atag: %a\n", LinuxAtag);
Print (L"\t- Fdt: %s\n", FdtDP);
AsciiPrint ("Choice: ");
Status = GetHIInputAscii(CmdLine,MAX_CMD_LINE);
ASSERT_EFI_ERROR (Status);
if (AsciiStrCmp(CmdLine,"1") == 0) {
// Start EBL
Status = BdsLoadApplication(L"Ebl");
if (Status == EFI_NOT_FOUND) {
AsciiPrint ("Error: EFI Application not found.\n");
} else {
AsciiPrint ("Error: Status Code: 0x%X\n",(UINT32)Status);
}
} else if (AsciiStrCmp(CmdLine,"2") == 0) {
ListDevicePaths (TRUE);
} else if (AsciiStrCmp(CmdLine,"3") == 0) {
// Start Linux Kernel
Status = BdsBootLinux(LinuxKernelDP,LinuxAtag,FdtDP);
if (EFI_ERROR(Status)) {
AsciiPrint ("Error: Fail to start Linux (0x%X)\n",(UINT32)Status);
}
} else {
AsciiPrint ("Error: Invalid choice.\n");
}
}
}
EFI_STATUS
EFIAPI
BdsInitialize (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
mBdsImageHandle = ImageHandle;
Status = gBS->InstallMultipleProtocolInterfaces (
&mBdsImageHandle,
&gEfiBdsArchProtocolGuid, &gBdsProtocol,
NULL
);
ASSERT_EFI_ERROR (Status);
return Status;
}
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