pm.c

该源码是AT91rm9200的U-boot原代码。

    (void)findData;
    return PM_FILE_INVALID;
}

/****************************************************************************
REMARKS:
Function to find the next file matching a search criteria in a directory.
****************************************************************************/
ibool PMAPI PM_findNextFile(
    void *handle,
    PM_findData *findData)
{
    // TODO: This function should find the next file in directory enumeration
    //       search given the search criteria defined in the call to
    //       PM_findFirstFile. The data should be converted and returned
    //       in the findData standard form.
    (void)handle;
    (void)findData;
    return false;
}

/****************************************************************************
REMARKS:
Function to close the find process
****************************************************************************/
void PMAPI PM_findClose(
    void *handle)
{
    // TODO: This function should close the find process. This may do
    //       nothing for some OS'es.
    (void)handle;
}

/****************************************************************************
REMARKS:
Function to determine if a drive is a valid drive or not. Under Unix this
function will return false for anything except a value of 3 (considered
the root drive, and equivalent to C: for non-Unix systems). The drive
numbering is:

    1   - Drive A:
    2   - Drive B:
    3   - Drive C:
    etc

****************************************************************************/
ibool PMAPI PM_driveValid(
    char drive)
{
    // Not supported in NT drivers
    (void)drive;
    return false;
}

/****************************************************************************
REMARKS:
Function to get the current working directory for the specififed drive.
Under Unix this will always return the current working directory regardless
of what the value of 'drive' is.
****************************************************************************/
void PMAPI PM_getdcwd(
    int drive,
    char *dir,
    int len)
{
    // Not supported in NT drivers
    (void)drive;
    (void)dir;
    (void)len;
}

/****************************************************************************
PARAMETERS:
base    - The starting physical base address of the region
size    - The size in bytes of the region
type    - Type to place into the MTRR register

RETURNS:
Error code describing the result.

REMARKS:
Function to enable write combining for the specified region of memory.
****************************************************************************/
int PMAPI PM_enableWriteCombine(
    ulong base,
    ulong size,
    uint type)
{
    return MTRR_enableWriteCombine(base,size,type);
}

/****************************************************************************
REMARKS:
Function to change the file attributes for a specific file.
****************************************************************************/
void PMAPI PM_setFileAttr(
    const char *filename,
    uint attrib)
{
    NTSTATUS                status;
    ACCESS_MASK             DesiredAccess = GENERIC_READ | GENERIC_WRITE;
    OBJECT_ATTRIBUTES       ObjectAttributes;
    ULONG                   ShareAccess = FILE_SHARE_READ;
    ULONG                   CreateDisposition = FILE_OPEN;
    HANDLE                  FileHandle = NULL;
    UNICODE_STRING          *uniFile = NULL;
    IO_STATUS_BLOCK         IoStatusBlock;
    FILE_BASIC_INFORMATION  FileBasic;
    char                    kernelFilename[PM_MAX_PATH+5];
    ULONG                   FileAttributes = 0;

    // Convert file attribute flags
    if (attrib & PM_FILE_READONLY)
        FileAttributes |= FILE_ATTRIBUTE_READONLY;
    if (attrib & PM_FILE_ARCHIVE)
        FileAttributes |= FILE_ATTRIBUTE_ARCHIVE;
    if (attrib & PM_FILE_HIDDEN)
        FileAttributes |= FILE_ATTRIBUTE_HIDDEN;
    if (attrib & PM_FILE_SYSTEM)
        FileAttributes |= FILE_ATTRIBUTE_SYSTEM;

    // Add prefix for addressing the file system. "\??\" is short for "\DosDevices\"
    strcpy(kernelFilename, "\\??\\");
    strcat(kernelFilename, filename);

    // Convert filename string to ansi string
    if ((uniFile = _PM_CStringToUnicodeString(kernelFilename)) == NULL)
        goto Exit;

    // Must open a file to query it's attributes
    InitializeObjectAttributes (&ObjectAttributes,
                                uniFile,
                                OBJ_CASE_INSENSITIVE,
                                NULL,
                                NULL );
    status = ZwCreateFile( &FileHandle,
                            DesiredAccess | SYNCHRONIZE,
                            &ObjectAttributes,
                            &IoStatusBlock,
                            NULL,                  //AllocationSize  OPTIONAL,
                            FILE_ATTRIBUTE_NORMAL,
                            ShareAccess,
                            CreateDisposition,
                            FILE_RANDOM_ACCESS,        //CreateOptions,
                            NULL,                  //EaBuffer  OPTIONAL,
                            0                      //EaLength (required if EaBuffer)
                            );
    if (!NT_SUCCESS (status))
        goto Exit;

    // Query timestamps
    status = ZwQueryInformationFile(FileHandle,
                                    &IoStatusBlock,
                                    &FileBasic,
                                    sizeof(FILE_BASIC_INFORMATION),
                                    FileBasicInformation
                                    );
    if (!NT_SUCCESS (status))
        goto Exit;

    // Change the four bits we change
    FileBasic.FileAttributes &= ~(FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_ARCHIVE
                                  | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM);
    FileBasic.FileAttributes |= FileAttributes;

    // Set timestamps
    ZwSetInformationFile(   FileHandle,
                            &IoStatusBlock,
                            &FileBasic,
                            sizeof(FILE_BASIC_INFORMATION),
                            FileBasicInformation
                            );

Exit:
    if (FileHandle) ZwClose(FileHandle);
    if (uniFile) _PM_FreeUnicodeString(uniFile);
    return;
}

/****************************************************************************
REMARKS:
Function to get the file attributes for a specific file.
****************************************************************************/
uint PMAPI PM_getFileAttr(
    const char *filename)
{
    NTSTATUS                status;
    ACCESS_MASK             DesiredAccess = GENERIC_READ | GENERIC_WRITE;
    OBJECT_ATTRIBUTES       ObjectAttributes;
    ULONG                   ShareAccess = FILE_SHARE_READ;
    ULONG                   CreateDisposition = FILE_OPEN;
    HANDLE                  FileHandle = NULL;
    UNICODE_STRING          *uniFile = NULL;
    IO_STATUS_BLOCK         IoStatusBlock;
    FILE_BASIC_INFORMATION  FileBasic;
    char                    kernelFilename[PM_MAX_PATH+5];
    ULONG                   FileAttributes = 0;
    uint                    retval = 0;

    // Add prefix for addressing the file system. "\??\" is short for "\DosDevices\"
    strcpy(kernelFilename, "\\??\\");
    strcat(kernelFilename, filename);

    // Convert filename string to ansi string
    if ((uniFile = _PM_CStringToUnicodeString(kernelFilename)) == NULL)
        goto Exit;

    // Must open a file to query it's attributes
    InitializeObjectAttributes (&ObjectAttributes,
                                uniFile,
                                OBJ_CASE_INSENSITIVE,
                                NULL,
                                NULL );
    status = ZwCreateFile( &FileHandle,
                           DesiredAccess | SYNCHRONIZE,
                           &ObjectAttributes,
                           &IoStatusBlock,
                           NULL,                  //AllocationSize  OPTIONAL,
                           FILE_ATTRIBUTE_NORMAL,
                           ShareAccess,
                           CreateDisposition,
                           FILE_RANDOM_ACCESS,        //CreateOptions,
                           NULL,                  //EaBuffer  OPTIONAL,
                           0                      //EaLength (required if EaBuffer)
                           );
    if (!NT_SUCCESS (status))
        goto Exit;

    // Query timestamps
    status = ZwQueryInformationFile(FileHandle,
                                    &IoStatusBlock,
                                    &FileBasic,
                                    sizeof(FILE_BASIC_INFORMATION),
                                    FileBasicInformation
                                    );
    if (!NT_SUCCESS (status))
        goto Exit;

    // Translate the file attributes
    if (FileBasic.FileAttributes & FILE_ATTRIBUTE_READONLY)
        retval |= PM_FILE_READONLY;
    if (FileBasic.FileAttributes & FILE_ATTRIBUTE_ARCHIVE)
        retval |= PM_FILE_ARCHIVE;
    if (FileBasic.FileAttributes & FILE_ATTRIBUTE_HIDDEN)
        retval |= PM_FILE_HIDDEN;
    if (FileBasic.FileAttributes & FILE_ATTRIBUTE_SYSTEM)
        retval |= PM_FILE_SYSTEM;

Exit:
    if (FileHandle) ZwClose(FileHandle);
    if (uniFile) _PM_FreeUnicodeString(uniFile);
    return retval;
}

/****************************************************************************
REMARKS:
Function to create a directory.
****************************************************************************/
ibool PMAPI PM_mkdir(
    const char *filename)
{
    // Not supported in NT drivers
    (void)filename;
    return false;
}

/****************************************************************************
REMARKS:
Function to remove a directory.
****************************************************************************/
ibool PMAPI PM_rmdir(
    const char *filename)
{
    // Not supported in NT drivers
    (void)filename;
    return false;
}

/****************************************************************************
REMARKS:
Function to get the file time and date for a specific file.
****************************************************************************/
ibool PMAPI PM_getFileTime(
    const char *filename,
    ibool gmTime,
    PM_time *time)
{
    // Not supported in NT drivers
    (void)filename;
    (void)gmTime;
    (void)time;
    return false;
}

/****************************************************************************
REMARKS:
Function to set the file time and date for a specific file.
****************************************************************************/
ibool PMAPI PM_setFileTime(
    const char *filename,
    ibool gmTime,
    PM_time *time)
{
    // Not supported in NT drivers
    (void)filename;
    (void)gmTime;
    (void)time;
    return false;
}