1/* SPDX-License-Identifier: GPL-2.0 */
2/* Copyright (C) 2021 Cadence Design Systems Inc. */
3
4#ifndef _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H
5#define _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H
6
7/*
8 *  System call like services offered by the simulator host.
9 */
10
11#define SYS_nop		0	/* unused */
12#define SYS_exit	1	/*x*/
13#define SYS_fork	2
14#define SYS_read	3	/*x*/
15#define SYS_write	4	/*x*/
16#define SYS_open	5	/*x*/
17#define SYS_close	6	/*x*/
18#define SYS_rename	7	/*x 38 - waitpid */
19#define SYS_creat	8	/*x*/
20#define SYS_link	9	/*x (not implemented on WIN32) */
21#define SYS_unlink	10	/*x*/
22#define SYS_execv	11	/* n/a - execve */
23#define SYS_execve	12	/* 11 - chdir */
24#define SYS_pipe	13	/* 42 - time */
25#define SYS_stat	14	/* 106 - mknod */
26#define SYS_chmod	15
27#define SYS_chown	16	/* 202 - lchown */
28#define SYS_utime	17	/* 30 - break */
29#define SYS_wait	18	/* n/a - oldstat */
30#define SYS_lseek	19	/*x*/
31#define SYS_getpid	20
32#define SYS_isatty	21	/* n/a - mount */
33#define SYS_fstat	22	/* 108 - oldumount */
34#define SYS_time	23	/* 13 - setuid */
35#define SYS_gettimeofday 24	/*x 78 - getuid (not implemented on WIN32) */
36#define SYS_times	25	/*X 43 - stime (Xtensa-specific implementation) */
37#define SYS_socket      26
38#define SYS_sendto      27
39#define SYS_recvfrom    28
40#define SYS_select_one  29      /* not compatible select, one file descriptor at the time */
41#define SYS_bind        30
42#define SYS_ioctl	31
43
44#define SYS_iss_argc	1000	/* returns value of argc */
45#define SYS_iss_argv_size 1001	/* bytes needed for argv & arg strings */
46#define SYS_iss_set_argv 1002	/* saves argv & arg strings at given addr */
47
48/*
49 * SYS_select_one specifiers
50 */
51
52#define  XTISS_SELECT_ONE_READ    1
53#define  XTISS_SELECT_ONE_WRITE   2
54#define  XTISS_SELECT_ONE_EXCEPT  3
55
56static int errno;
57
58static inline int __simc(int a, int b, int c, int d)
59{
60	register int a1 asm("a2") = a;
61	register int b1 asm("a3") = b;
62	register int c1 asm("a4") = c;
63	register int d1 asm("a5") = d;
64	__asm__ __volatile__ (
65			"simcall\n"
66			: "+r"(a1), "+r"(b1)
67			: "r"(c1), "r"(d1)
68			: "memory");
69	errno = b1;
70	return a1;
71}
72
73#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H */
74