Lines Matching +full:string +full:- +full:support
1 .. SPDX-License-Identifier: GPL-2.0
10 spufs - the SPU file system
26 logical SPU. Users can change permissions on those files, but not actu-
43 The files in spufs mostly follow the standard behavior for regular sys-
44 tem calls like read(2) or write(2), but often support only a subset of
49 All files that support the read(2) operation also support readv(2) and
50 all files that support the write(2) operation also support writev(2).
51 All files support the access(2) and stat(2) family of operations, but
55 All files support the chmod(2)/fchmod(2) and chown(2)/fchown(2) opera-
81 The first SPU to CPU communication mailbox. This file is read-only and
82 can be read in units of 32 bits. The file can only be used in non-
87 If a count smaller than four is requested, read returns -1 and
89 box, the return value is set to -1 and errno becomes EAGAIN.
101 If a count smaller than four is requested, read returns -1 and
104 return value is set to -1 and errno becomes EAGAIN.
118 The CPU to SPU communation mailbox. It is write-only and can be written
122 four is requested, write returns -1 and sets errno to EINVAL. If there
124 opened with O_NONBLOCK, the return value is set to -1 and errno becomes
129 reads from its PPE mailbox channel. When data has been read success-
139 Read-only files that contain the length of the current queue, i.e. how
141 written to wbox without blocking. The files can be read only in 4-byte
142 units and return a big-endian binary integer number. The possible
146 If a count smaller than four is requested, read returns -1 and
155 Internal registers of the SPU. The representation is an ASCII string
180 completing the string, regardless of changes to the register by
181 a running SPU task. When a complete string has been read, all
187 the value given in the string. The string is parsed from the
188 beginning to the first non-numeric character or the end of the
194 This file gives access to the Floating Point Status and Control Regis-
198 If a count smaller than four is requested, read returns -1 and
200 the data buffer, containing the current value of the fpcr regis-
204 If a count smaller than four is requested, write returns -1 and
210 The two signal notification channels of an SPU. These are read-write
215 is reset to zero. The possible operations on an open signal1 or sig-
219 If a count smaller than four is requested, read returns -1 and
225 If a count smaller than four is requested, write returns -1 and
236 These two files change the behavior of the signal1 and signal2 notifi-
237 cation files. The contain a numerical ASCII string which is read as
240 mode 1 (logical OR), the hardware accumulates the bits that are subse-
246 required length for the digit plus a newline character, subse-
247 quent reads from the same file descriptor will result in com-
248 pleting the string. When a complete string has been read, all
254 the value given in the string. The string is parsed from the
255 beginning to the first non-numeric character or the end of the