| /* |
| * The authors hereby grant permission to use, copy, modify, distribute, |
| * and license this software and its documentation for any purpose, provided |
| * that existing copyright notices are retained in all copies and that this |
| * notice is included verbatim in any distributions. No written agreement, |
| * license, or royalty fee is required for any of the authorized uses. |
| * Modifications to this software may be copyrighted by their authors |
| * and need not follow the licensing terms described here, provided that |
| * the new terms are clearly indicated on the first page of each file where |
| * they apply. |
| */ |
| |
| /************************************************************************ |
| * |
| * excause.h |
| * |
| * (c) Copyright 2001-2003 Analog Devices, Inc. All rights reserved. |
| * |
| ************************************************************************/ |
| |
| /* |
| ** Definitions of constants for the four user-level bits in EXCAUSE, |
| ** the field from SYSSTAT that is set when the EXCPT instruction is |
| ** invoked. |
| */ |
| |
| #ifndef _EXCAUSE_H |
| #define _EXCAUSE_H |
| |
| /* |
| ** Value 0x0 - exit program. (halt) |
| ** R0 => exit status. |
| */ |
| |
| #define EX_EXIT_PROG 0x0 |
| |
| /* |
| ** Value 0x1 - abnormal exit (abort) |
| */ |
| |
| #define EX_ABORT_PROG 0x1 |
| |
| /* |
| ** Value 0x2 - invoke system service. |
| ** R0 => command. |
| ** R1 => first arg |
| ** R2 => second arg |
| */ |
| |
| #define EX_SYS_REQ 0x2 |
| |
| /* |
| ** Available commands: |
| */ |
| |
| #define EX_SYSREQ_NONE 0x00 /* Do nothing */ |
| #define EX_SYSREQ_REG_ISR 0x01 /* Register an interrupt handler. |
| R1==EVT entry, R2==func ptr |
| Returns previous entry in R0. */ |
| #define EX_SYSREQ_RAISE_INT 0x02 /* Cause an interrupt |
| R1 = int number */ |
| /* |
| ** Values 0x3 to 0x4 currently undefined. |
| */ |
| |
| /* |
| ** Value 0x5 - File I/O |
| ** R0 => first arg |
| ** R1 => second arg |
| ** R2 => third arg |
| ** R4 => command |
| ** result => R0 |
| */ |
| |
| #define EX_FILE_IO 0x5 |
| |
| /* |
| ** Available commands: |
| ** XXX stdout/stderr are handled separately for writing. |
| */ |
| |
| #define EX_FILEIO_OPEN 0x00 /* R0 => dev, R1=> path, R2=>mode */ |
| #define EX_FILEIO_CLOSE 0x01 /* R0=> fid */ |
| #define EX_FILEIO_WRITE 0x02 /* R0=>fid, R1=>data, R2=>length */ |
| #define EX_FILEIO_READ 0x03 /* R0=>fid, R1=>data, R2=>length */ |
| #define EX_FILEIO_SEEK 0x04 /* R0=>fid, R1=>offset, R2=>mode */ |
| #define EX_FILEIO_DUP 0x05 /* R0=>fid */ |
| |
| /* |
| ** Values 0x6 to 0xF currently undefined. |
| */ |
| |
| #endif /* _EXCAUSE_H */ |
