Lines Matching +full:four +full:- +full:cell
1 .. SPDX-License-Identifier: GPL-2.0
10 spufs - the SPU file system
16 The SPU file system is used on PowerPC machines that implement the Cell
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-
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.
90 When data has been read successfully, four bytes are placed in
91 the data buffer and the value four is returned.
101 If a count smaller than four is requested, read returns -1 and
104 return value is set to -1 and errno becomes EAGAIN.
109 When data has been read successfully, four bytes are placed in
110 the data buffer and the value four is returned.
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-
130 fully, four bytes are placed in the data buffer and the value four is
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
147 sets errno to EINVAL. Otherwise, a four byte value is placed in
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-
195 ter as a four byte long file. The operations on the fpcr file are:
198 If a count smaller than four is requested, read returns -1 and
199 sets errno to EINVAL. Otherwise, a four byte value is placed in
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
205 sets errno to EINVAL. Otherwise, a four byte value is copied
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
220 sets errno to EINVAL. Otherwise, a four byte value is placed in
225 If a count smaller than four is requested, write returns -1 and
226 sets errno to EINVAL. Otherwise, a four byte value is copied
236 These two files change the behavior of the signal1 and signal2 notifi-
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-
255 beginning to the first non-numeric character or the end of the