Release 4.14 arch/xtensa/platforms/iss/include/platform/simcall.h

/*
 * include/asm-xtensa/platform-iss/simcall.h
 *
 * 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) 2001 Tensilica Inc.
 * Copyright (C) 2017 Cadence Design Systems Inc.
 */

#ifndef _XTENSA_PLATFORM_ISS_SIMCALL_H

#define _XTENSA_PLATFORM_ISS_SIMCALL_H


/*
 *  System call like services offered by the simulator host.
 */


#define SYS_nop		0	
/* unused */

#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


#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 */

/*
 * SYS_select_one specifiers
 */


#define  XTISS_SELECT_ONE_READ    1

#define  XTISS_SELECT_ONE_WRITE   2

#define  XTISS_SELECT_ONE_EXCEPT  3


static int errno;



static inline int __simc(int a, int b, int c, int d)
{
	int ret;
	register int a1 asm("a2") = a;
	register int b1 asm("a3") = b;
	register int c1 asm("a4") = c;
	register int d1 asm("a5") = d;
	__asm__ __volatile__ (
                        "simcall\n"
                        "mov %0, a2\n"
                        "mov %1, a3\n"
                        : "=a" (ret), "=a" (errno), "+r"(a1), "+r"(b1)
                        : "r"(c1), "r"(d1)
                        : "memory");
	return ret;
}

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static inline int simc_exit(int exit_code)
{
	return __simc(SYS_exit, exit_code, 0, 0);
}

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static inline int simc_open(const char *file, int flags, int mode)
{
	return __simc(SYS_open, (int) file, flags, mode);
}

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static inline int simc_close(int fd)
{
	return __simc(SYS_close, fd, 0, 0);
}

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static inline int simc_ioctl(int fd, int request, void *arg)
{
	return __simc(SYS_ioctl, fd, request, (int) arg);
}

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static inline int simc_read(int fd, void *buf, size_t count)
{
	return __simc(SYS_read, fd, (int) buf, count);
}

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static inline int simc_write(int fd, const void *buf, size_t count)
{
	return __simc(SYS_write, fd, (int) buf, count);
}

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static inline int simc_poll(int fd)
{
	struct timeval tv = { .tv_sec = 0, .tv_usec = 0 };

	return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv);
}

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static inline int simc_lseek(int fd, uint32_t off, int whence)
{
	return __simc(SYS_lseek, fd, off, whence);
}

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static inline int simc_argc(void)
{
	return __simc(SYS_iss_argc, 0, 0, 0);
}

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static inline int simc_argv_size(void)
{
	return __simc(SYS_iss_argv_size, 0, 0, 0);
}

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static inline void simc_argv(void *buf)
{
	__simc(SYS_iss_set_argv, (int)buf, 0, 0);
}

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#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_H */

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Directory: arch/xtensa/platforms/iss/include/platform

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