linux/include/asm-xtensa/xtensa/simcall.h

#ifndef SIMCALL_INCLUDED
#define SIMCALL_INCLUDED

/*
 * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
 *
 * include/asm-xtensa/xtensa/simcall.h  -  Simulator call numbers
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file "COPYING" in the main directory of
 * this archive for more details.
 *
 * Copyright (C) 2002 Tensilica Inc.
 */


/*
 *  System call like services offered by the simulator host.
 *  These are modeled after the Linux 2.4 kernel system calls
 *  for Xtensa processors.  However not all system calls and
 *  not all functionality of a given system call are implemented,
 *  or necessarily have well defined or equivalent semantics in
 *  the context of a simulation (as opposed to a Unix kernel).
 *
 *  These services behave largely as if they had been invoked
 *  as a task in the simulator host's operating system
 *  (eg. files accessed are those of the simulator host).
 *  However, these SIMCALLs model a virtual operating system
 *  so that various definitions, bit assignments etc
 *  (eg. open mode bits, errno values, etc) are independent
 *  of the host operating system used to run the simulation.
 *  Rather these definitions are specific to the Xtensa ISS.
 *  This way Xtensa ISA code written to use these SIMCALLs
 *  can (in principle) be simulated on any host.
 *
 *  Up to 6 parameters are passed in registers a3 to a8
 *  (note the 6th parameter isn't passed on the stack,
 *   unlike windowed function calling conventions).
 *  The return value is in a2.  A negative value in the
 *  range -4096 to -1 indicates a negated error code to be
 *  reported in errno with a return value of -1, otherwise
 *  the value in a2 is returned as is.
 */

/* These #defines need to match what's in Xtensa/OS/vxworks/xtiss/simcalls.c */

#define SYS_nop		0	/* n/a - setup; used to flush register windows */
#define SYS_exit	1	/*x*/
#define SYS_fork	2
#define SYS_read	3	/*x*/
#define SYS_write	4	/*x*/
#define SYS_open	5	/*x*/
#define SYS_close	6	/*x*/
#define SYS_rename	7	/*x 38 - waitpid */
#define SYS_creat	8	/*x*/
#define SYS_link	9	/*x (not implemented on WIN32) */
#define SYS_unlink	10	/*x*/
#define SYS_execv	11	/* n/a - execve */
#define SYS_execve	12	/* 11 - chdir */
#define SYS_pipe	13	/* 42 - time */
#define SYS_stat	14	/* 106 - mknod */
#define SYS_chmod	15
#define SYS_chown	16	/* 202 - lchown */
#define SYS_utime	17	/* 30 - break */
#define SYS_wait	18	/* n/a - oldstat */
#define SYS_lseek	19	/*x*/
#define SYS_getpid	20
#define SYS_isatty	21	/* n/a - mount */
#define SYS_fstat	22	/* 108 - oldumount */
#define SYS_time	23	/* 13 - setuid */
#define SYS_gettimeofday 24	/*x 78 - getuid (not implemented on WIN32) */
#define SYS_times	25	/*X 43 - stime (Xtensa-specific implementation) */
#define SYS_socket      26
#define SYS_sendto      27
#define SYS_recvfrom    28
#define SYS_select_one  29      /* not compitible select, one file descriptor at the time */
#define SYS_bind        30
#define SYS_ioctl	31

/*
 *  Other...
 */
#define SYS_iss_argc      1000	/* returns value of argc */
#define SYS_iss_argv_size 1001	/* bytes needed for argv & arg strings */
#define SYS_iss_set_argv  1002	/* saves argv & arg strings at given addr */

/*
 * SIMCALLs for the ferret memory debugger. All are invoked by
 * libferret.a ...  ( Xtensa/Target-Libs/ferret )
 */
#define SYS_ferret           1010
#define SYS_malloc           1011
#define SYS_free             1012
#define SYS_more_heap        1013
#define SYS_no_heap          1014


/*
 *  Extra SIMCALLs for GDB:
 */
#define SYS_gdb_break         -1	/* invoked by XTOS on user exceptions if EPC points
					   to a break.n/break, regardless of cause! */
#define SYS_xmon_out          -2	/* invoked by XMON: ... */
#define SYS_xmon_in           -3	/* invoked by XMON: ... */
#define SYS_xmon_flush        -4	/* invoked by XMON: ... */
#define SYS_gdb_abort         -5	/* invoked by XTOS in _xtos_panic() */
#define SYS_gdb_illegal_inst  -6	/* invoked by XTOS for illegal instructions (too deeply) */
#define SYS_xmon_init         -7	/* invoked by XMON: ... */
#define SYS_gdb_enter_sktloop -8	/* invoked by XTOS on debug exceptions */

/*
 *  SIMCALLs for vxWorks xtiss BSP:
 */
#define SYS_setup_ppp_pipes   -83
#define SYS_log_msg           -84

/*
 *  Test SIMCALLs:
 */
#define SYS_test_write_state  -100
#define SYS_test_read_state   -101

/*
 * SYS_select_one specifiers
 */
#define  XTISS_SELECT_ONE_READ    1
#define  XTISS_SELECT_ONE_WRITE   2
#define  XTISS_SELECT_ONE_EXCEPT  3

#endif /* !SIMCALL_INCLUDED */