xref: /linux/arch/xtensa/platforms/iss/include/platform/simcall-iss.h (revision 8be98d2f2a0a262f8bf8a0bc1fdf522b3c7aab17)
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 
56 static int errno;
57 
__simc(int a,int b,int c,int d)58 static 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