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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-s390/tape390.h
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-s390/tape390.h')
-rw-r--r--include/asm-s390/tape390.h39
1 files changed, 39 insertions, 0 deletions
diff --git a/include/asm-s390/tape390.h b/include/asm-s390/tape390.h
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1/*************************************************************************
2 *
3 * tape390.h
4 * enables user programs to display messages on the tape device
5 *
6 * S390 and zSeries version
7 * Copyright (C) 2001 IBM Corporation
8 * Author(s): Despina Papadopoulou <despina_p@de.ibm.com>
9 *
10 *************************************************************************/
11
12#ifndef _TAPE390_H
13#define _TAPE390_H
14
15#define TAPE390_DISPLAY _IOW('d', 1, struct display_struct)
16
17/*
18 * The TAPE390_DISPLAY ioctl calls the Load Display command
19 * which transfers 17 bytes of data from the channel to the subsystem:
20 * - 1 format control byte, and
21 * - two 8-byte messages
22 *
23 * Format control byte:
24 * 0-2: New Message Overlay
25 * 3: Alternate Messages
26 * 4: Blink Message
27 * 5: Display Low/High Message
28 * 6: Reserved
29 * 7: Automatic Load Request
30 *
31 */
32
33typedef struct display_struct {
34 char cntrl;
35 char message1[8];
36 char message2[8];
37} display_struct;
38
39#endif