1/*
2 * include/asm-xtensa/platform-iss/simcall.h
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License.  See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2001 Tensilica Inc.
9 */
10
11#ifndef _XTENSA_PLATFORM_ISS_SIMCALL_H
12#define _XTENSA_PLATFORM_ISS_SIMCALL_H
13
14
15/*
16 *  System call like services offered by the simulator host.
17 */
18
19#define SYS_nop		0	/* unused */
20#define SYS_exit	1	/*x*/
21#define SYS_fork	2
22#define SYS_read	3	/*x*/
23#define SYS_write	4	/*x*/
24#define SYS_open	5	/*x*/
25#define SYS_close	6	/*x*/
26#define SYS_rename	7	/*x 38 - waitpid */
27#define SYS_creat	8	/*x*/
28#define SYS_link	9	/*x (not implemented on WIN32) */
29#define SYS_unlink	10	/*x*/
30#define SYS_execv	11	/* n/a - execve */
31#define SYS_execve	12	/* 11 - chdir */
32#define SYS_pipe	13	/* 42 - time */
33#define SYS_stat	14	/* 106 - mknod */
34#define SYS_chmod	15
35#define SYS_chown	16	/* 202 - lchown */
36#define SYS_utime	17	/* 30 - break */
37#define SYS_wait	18	/* n/a - oldstat */
38#define SYS_lseek	19	/*x*/
39#define SYS_getpid	20
40#define SYS_isatty	21	/* n/a - mount */
41#define SYS_fstat	22	/* 108 - oldumount */
42#define SYS_time	23	/* 13 - setuid */
43#define SYS_gettimeofday 24	/*x 78 - getuid (not implemented on WIN32) */
44#define SYS_times	25	/*X 43 - stime (Xtensa-specific implementation) */
45#define SYS_socket      26
46#define SYS_sendto      27
47#define SYS_recvfrom    28
48#define SYS_select_one  29      /* not compitible select, one file descriptor at the time */
49#define SYS_bind        30
50#define SYS_ioctl	31
51
52/*
53 * SYS_select_one specifiers
54 */
55
56#define  XTISS_SELECT_ONE_READ    1
57#define  XTISS_SELECT_ONE_WRITE   2
58#define  XTISS_SELECT_ONE_EXCEPT  3
59
60static int errno;
61
62static inline int __simc(int a, int b, int c, int d)
63{
64	int ret;
65	register int a1 asm("a2") = a;
66	register int b1 asm("a3") = b;
67	register int c1 asm("a4") = c;
68	register int d1 asm("a5") = d;
69	__asm__ __volatile__ (
70			"simcall\n"
71			"mov %0, a2\n"
72			"mov %1, a3\n"
73			: "=a" (ret), "=a" (errno), "+r"(a1), "+r"(b1)
74			: "r"(c1), "r"(d1)
75			: "memory");
76	return ret;
77}
78
79static inline int simc_open(const char *file, int flags, int mode)
80{
81	return __simc(SYS_open, (int) file, flags, mode);
82}
83
84static inline int simc_close(int fd)
85{
86	return __simc(SYS_close, fd, 0, 0);
87}
88
89static inline int simc_ioctl(int fd, int request, void *arg)
90{
91	return __simc(SYS_ioctl, fd, request, (int) arg);
92}
93
94static inline int simc_read(int fd, void *buf, size_t count)
95{
96	return __simc(SYS_read, fd, (int) buf, count);
97}
98
99static inline int simc_write(int fd, const void *buf, size_t count)
100{
101	return __simc(SYS_write, fd, (int) buf, count);
102}
103
104static inline int simc_poll(int fd)
105{
106	struct timeval tv = { .tv_sec = 0, .tv_usec = 0 };
107
108	return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv);
109}
110
111static inline int simc_lseek(int fd, uint32_t off, int whence)
112{
113	return __simc(SYS_lseek, fd, off, whence);
114}
115
116#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_H */
117
118