2 Value transformations between stdio and the UEFI environment.
4 Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials are licensed and made available under
6 the terms and conditions of the BSD License that accompanies this distribution.
7 The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
16 #include <LibConfig.h>
17 #include <sys/EfiCdefs.h>
21 #include <Efi/SysEfi.h>
23 /** Translate the Open flags into a Uefi Open Modes value.
26 O_RDONLY, O_WRONLY, O_RDWR // Pick only one
28 O_NONBLOCK, O_APPEND, O_CREAT, O_TRUNC, O_EXCL // ORed with one of the previous
30 The UEFI Open modes are:
31 // ******************************************************
33 // ******************************************************
34 #define EFI_FILE_MODE_READ 0x0000000000000001
35 #define EFI_FILE_MODE_WRITE 0x0000000000000002
36 #define EFI_FILE_MODE_CREATE 0x8000000000000000
41 Oflags2EFI( int oflags
)
45 // Build the Open Modes
46 flags
= (UINT64
)((oflags
& O_ACCMODE
) + 1); // Handle the Read/Write flags
47 if(flags
& EFI_FILE_MODE_WRITE
) { // Asking for write only?
48 // EFI says the only two RW modes are read-only and read+write.
49 flags
= EFI_FILE_MODE_READ
| EFI_FILE_MODE_WRITE
;
51 if(oflags
& (O_CREAT
| O_TRUNC
)) { // Now add the Create flag.
52 // Also added if O_TRUNC set since we will need to create a new file.
53 // We just set the flags here since the only valid EFI mode with create
54 // is Read+Write+Create.
55 flags
= EFI_FILE_MODE_READ
| EFI_FILE_MODE_WRITE
| EFI_FILE_MODE_CREATE
;
60 /* Transform the permissions flags into their equivalent UEFI File Attribute bits.
61 This transformation is most frequently used when translating attributes for use
62 by the UEFI EFI_FILE_PROTOCOL.SetInfo() function.
64 The UEFI File attributes are:
65 // ******************************************************
67 // ******************************************************
68 #define EFI_FILE_READ_ONLY 0x0000000000000001
69 #define EFI_FILE_HIDDEN 0x0000000000000002
70 #define EFI_FILE_SYSTEM 0x0000000000000004
71 #define EFI_FILE_RESERVED 0x0000000000000008
72 #define EFI_FILE_DIRECTORY 0x0000000000000010
73 #define EFI_FILE_ARCHIVE 0x0000000000000020
74 #define EFI_FILE_VALID_ATTR 0x0000000000000037
76 The input permission flags consist of the following flags:
77 O_RDONLY -- open for reading only
78 O_WRONLY -- open for writing only
79 O_RDWR -- open for reading and writing
80 O_ACCMODE -- mask for above modes
81 O_NONBLOCK -- no delay
82 O_APPEND -- set append mode
83 O_CREAT -- create if nonexistent
84 O_TRUNC -- truncate to zero length
85 O_EXCL -- error if already exists
86 O_HIDDEN -- Hidden file attribute
87 O_SYSTEM -- System file attribute
88 O_ARCHIVE -- Archive file attribute
95 /* File is Read-Only. */
96 if((mode
& O_ACCMODE
) == 0) {
97 flags
= EFI_FILE_READ_ONLY
;
99 /* Set the Hidden attribute. */
100 if((mode
& O_HIDDEN
) != 0) {
101 flags
|= EFI_FILE_HIDDEN
;
103 /* Set the System attribute. */
104 if((mode
& O_SYSTEM
) != 0) {
105 flags
|= EFI_FILE_SYSTEM
;
107 /* Set the Archive attribute. */
108 if((mode
& O_ARCHIVE
) != 0) {
109 flags
|= EFI_FILE_ARCHIVE
;
114 /* Converts the first several EFI status values into the appropriate errno value.
117 EFI2errno( RETURN_STATUS Status
)
125 case RETURN_INVALID_PARAMETER
:
128 case RETURN_UNSUPPORTED
:
131 case RETURN_BAD_BUFFER_SIZE
:
132 case RETURN_BUFFER_TOO_SMALL
:
135 case RETURN_NOT_READY
:
138 case RETURN_WRITE_PROTECTED
:
141 case RETURN_OUT_OF_RESOURCES
: // May be overridden by specific functions
144 case RETURN_VOLUME_FULL
:
147 case RETURN_NOT_FOUND
:
148 case RETURN_NO_MAPPING
:
154 case RETURN_NOT_STARTED
:
157 case RETURN_ALREADY_STARTED
:
163 case RETURN_ICMP_ERROR
:
164 case RETURN_TFTP_ERROR
:
165 case RETURN_PROTOCOL_ERROR
:
168 case RETURN_INCOMPATIBLE_VERSION
:
171 case RETURN_ACCESS_DENIED
:
172 case RETURN_SECURITY_VIOLATION
:
175 /* case RETURN_LOAD_ERROR:
176 case RETURN_DEVICE_ERROR:
177 case RETURN_VOLUME_CORRUPTED:
178 case RETURN_NO_MEDIA:
179 case RETURN_MEDIA_CHANGED:
180 case RETURN_NO_RESPONSE:
181 case RETURN_CRC_ERROR:
182 case RETURN_END_OF_MEDIA:
183 case RETURN_END_OF_FILE:
184 case RETURN_INVALID_LANGUAGE: