| 1 | /* |
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| 2 | * The authors hereby grant permission to use, copy, modify, distribute, |
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| 3 | * and license this software and its documentation for any purpose, provided |
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| 4 | * that existing copyright notices are retained in all copies and that this |
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| 5 | * notice is included verbatim in any distributions. No written agreement, |
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| 6 | * license, or royalty fee is required for any of the authorized uses. |
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| 7 | * Modifications to this software may be copyrighted by their authors |
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| 8 | * and need not follow the licensing terms described here, provided that |
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| 9 | * the new terms are clearly indicated on the first page of each file where |
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| 10 | * they apply. |
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| 11 | */ |
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| 12 | |
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| 13 | /************************************************************************ |
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| 14 | * |
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| 15 | * excause.h |
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| 16 | * |
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| 17 | * (c) Copyright 2001-2003 Analog Devices, Inc. All rights reserved. |
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| 18 | * |
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| 19 | ************************************************************************/ |
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| 20 | |
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| 21 | /* |
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| 22 | ** Definitions of constants for the four user-level bits in EXCAUSE, |
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| 23 | ** the field from SYSSTAT that is set when the EXCPT instruction is |
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| 24 | ** invoked. |
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| 25 | */ |
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| 26 | |
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| 27 | #ifndef _EXCAUSE_H |
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| 28 | #define _EXCAUSE_H |
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| 29 | |
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| 30 | /* |
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| 31 | ** Value 0x0 - exit program. (halt) |
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| 32 | ** R0 => exit status. |
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| 33 | */ |
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| 34 | |
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| 35 | #define EX_EXIT_PROG 0x0 |
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| 36 | |
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| 37 | /* |
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| 38 | ** Value 0x1 - abnormal exit (abort) |
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| 39 | */ |
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| 40 | |
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| 41 | #define EX_ABORT_PROG 0x1 |
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| 42 | |
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| 43 | /* |
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| 44 | ** Value 0x2 - invoke system service. |
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| 45 | ** R0 => command. |
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| 46 | ** R1 => first arg |
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| 47 | ** R2 => second arg |
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| 48 | */ |
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| 49 | |
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| 50 | #define EX_SYS_REQ 0x2 |
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| 51 | |
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| 52 | /* |
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| 53 | ** Available commands: |
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| 54 | */ |
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| 55 | |
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| 56 | #define EX_SYSREQ_NONE 0x00 /* Do nothing */ |
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| 57 | #define EX_SYSREQ_REG_ISR 0x01 /* Register an interrupt handler. |
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| 58 | R1==EVT entry, R2==func ptr |
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| 59 | Returns previous entry in R0. */ |
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| 60 | #define EX_SYSREQ_RAISE_INT 0x02 /* Cause an interrupt |
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| 61 | R1 = int number */ |
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| 62 | /* |
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| 63 | ** Values 0x3 to 0x4 currently undefined. |
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| 64 | */ |
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| 65 | |
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| 66 | /* |
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| 67 | ** Value 0x5 - File I/O |
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| 68 | ** R0 => first arg |
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| 69 | ** R1 => second arg |
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| 70 | ** R2 => third arg |
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| 71 | ** R4 => command |
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| 72 | ** result => R0 |
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| 73 | */ |
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| 74 | |
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| 75 | #define EX_FILE_IO 0x5 |
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| 76 | |
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| 77 | /* |
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| 78 | ** Available commands: |
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| 79 | ** XXX stdout/stderr are handled separately for writing. |
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| 80 | */ |
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| 81 | |
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| 82 | #define EX_FILEIO_OPEN 0x00 /* R0 => dev, R1=> path, R2=>mode */ |
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| 83 | #define EX_FILEIO_CLOSE 0x01 /* R0=> fid */ |
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| 84 | #define EX_FILEIO_WRITE 0x02 /* R0=>fid, R1=>data, R2=>length */ |
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| 85 | #define EX_FILEIO_READ 0x03 /* R0=>fid, R1=>data, R2=>length */ |
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| 86 | #define EX_FILEIO_SEEK 0x04 /* R0=>fid, R1=>offset, R2=>mode */ |
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| 87 | #define EX_FILEIO_DUP 0x05 /* R0=>fid */ |
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| 88 | |
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| 89 | /* |
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| 90 | ** Values 0x6 to 0xF currently undefined. |
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| 91 | */ |
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| 92 | |
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| 93 | #endif /* _EXCAUSE_H */ |
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