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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [libgloss/] [bfin/] [include/] [sys/] [excause.h] - Rev 281
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/* * 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 * * Copyright (C) 2008 Analog Devices, Inc. * ************************************************************************/ /* ** 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 */
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