/**
Read from IO space
Argv[0] - "ioread"[.#] # is optional width 1, 2, or 4. Default 1
Argv[1] - Hex IO address
ior.4 0x3f8 ;Do a 32-bit IO Read from 0x3f8
ior 0x3f8 ;Do a 8-bit IO Read from 0x3f8
@param Argc Number of command arguments in Argv
@param Argv Array of strings that represent the parsed command line.
Argv[0] is the command name
@return EFI_SUCCESS
**/
EFI_STATUS
EblIoReadCmd (
IN UINTN Argc,
IN CHAR8 **Argv
)
{
UINTN Width;
UINTN Port;
UINTN Data;
if (Argc < 2) {
return EFI_INVALID_PARAMETER;
}
Port = AsciiStrHexToUintn (Argv[1]);
Width = WidthFromCommandName (Argv[0], 1);
if (Width == 1) {
Data = IoRead8 (Port);
} else if (Width == 2) {
Data = IoRead16 (Port);
} else if (Width == 4) {
Data = IoRead32 (Port);
} else {
return EFI_INVALID_PARAMETER;
}
AsciiPrint ("0x%04x = 0x%x", Port, Data);
return EFI_SUCCESS;
}
/**
Write to IO space
Argv[0] - "iowrite"[.#] # is optional width 1, 2, or 4. Default 1
Argv[1] - Hex IO address
Argv[2] - Hex data to write
iow.4 0x3f8 af ;Do a 32-bit IO write of af to 0x3f8
iow 0x3f8 af ;Do an 8-bit IO write of af to 0x3f8
@param Argc Number of command arguments in Argv
@param Argv Array of strings that represent the parsed command line.
Argv[0] is the command name
@return EFI_SUCCESS
**/
EFI_STATUS
EblIoWriteCmd (
IN UINTN Argc,
IN CHAR8 **Argv
)
{
UINTN Width;
UINTN Port;
UINTN Data;
if (Argc < 3) {
return EFI_INVALID_PARAMETER;
}
Port = AsciiStrHexToUintn (Argv[1]);
Data = AsciiStrHexToUintn (Argv[2]);
Width = WidthFromCommandName (Argv[0], 1);
if (Width == 1) {
IoWrite8 (Port, (UINT8)Data);
} else if (Width == 2) {
IoWrite16 (Port, (UINT16)Data);
} else if (Width == 4) {
IoWrite32 (Port, (UINT32)Data);
} else {
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
/**
Toggle page break global. This turns on and off prompting to Quit or hit any
key to continue when a command is about to scroll the screen with its output
Argv[0] - "hexdump"[.#] # is optional 1,2, or 4 for width
Argv[1] - Device or File to dump.
Argv[2] - Optional offset to start dumping
Argv[3] - Optional number of bytes to dump
@param Argc Number of command arguments in Argv
@param Argv Array of strings that represent the parsed command line.
Argv[0] is the command name
@return EFI_SUCCESS
**/
EFI_STATUS
EFIAPI
EblHexdumpCmd (
IN UINTN Argc,
IN CHAR8 **Argv
)
{
EFI_OPEN_FILE *File;
VOID *Location;
UINTN Size;
UINTN Width;
UINTN Offset = 0;
EFI_STATUS Status;
UINTN Chunk = HEXDUMP_CHUNK;
if ((Argc < 2) || (Argc > 4)) {
return EFI_INVALID_PARAMETER;
}
Width = WidthFromCommandName (Argv[0], 1);
if ((Width != 1) && (Width != 2) && (Width != 4)) {
return EFI_INVALID_PARAMETER;
}
File = EfiOpen (Argv[1], EFI_FILE_MODE_READ, 0);
if (File == NULL) {
return EFI_NOT_FOUND;
}
Location = AllocatePool (Chunk);
Size = (Argc > 3) ? AsciiStrHexToUintn (Argv[3]) : EfiTell (File, NULL);
Offset = 0;
if (Argc > 2) {
Offset = AsciiStrHexToUintn (Argv[2]);
if (Offset > 0) {
// Make sure size includes the part of the file we have skipped
Size += Offset;
}
}
Status = EfiSeek (File, Offset, EfiSeekStart);
if (EFI_ERROR (Status)) {
goto Exit;
}
for (; Offset + HEXDUMP_CHUNK <= Size; Offset += Chunk) {
Chunk = HEXDUMP_CHUNK;
Status = EfiRead (File, Location, &Chunk);
if (EFI_ERROR(Status)) {
AsciiPrint ("Error reading file content\n");
goto Exit;
}
Status = OutputData (Location, Chunk, Width, File->BaseOffset + Offset);
if (EFI_ERROR(Status)) {
if (Status == EFI_END_OF_FILE) {
Status = EFI_SUCCESS;
}
goto Exit;
}
}
// Any left over?
if (Offset < Size) {
Chunk = Size - Offset;
Status = EfiRead (File, Location, &Chunk);
if (EFI_ERROR(Status)) {
AsciiPrint ("Error reading file content\n");
goto Exit;
}
Status = OutputData (Location, Chunk, Width, File->BaseOffset + Offset);
if (EFI_ERROR(Status)) {
if (Status == EFI_END_OF_FILE) {
Status = EFI_SUCCESS;
}
goto Exit;
}
}
Exit:
EfiClose (File);
FreePool (Location);
return EFI_SUCCESS;
}
