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

   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  * Copyright (C) 2017 Cadence Design Systems Inc.
  10  */
  11
  12 #ifndef _XTENSA_PLATFORM_ISS_SIMCALL_H
  13 #define _XTENSA_PLATFORM_ISS_SIMCALL_H
  14
  15
  16 /*
  17  *  System call like services offered by the simulator host.
  18  */
  19
  20 #define SYS_nop         0       /* unused */
  21 #define SYS_exit        1       /*x*/
  22 #define SYS_fork        2
  23 #define SYS_read        3       /*x*/
  24 #define SYS_write       4       /*x*/
  25 #define SYS_open        5       /*x*/
  26 #define SYS_close       6       /*x*/
  27 #define SYS_rename      7       /*x 38 - waitpid */
  28 #define SYS_creat       8       /*x*/
  29 #define SYS_link        9       /*x (not implemented on WIN32) */
  30 #define SYS_unlink      10      /*x*/
  31 #define SYS_execv       11      /* n/a - execve */
  32 #define SYS_execve      12      /* 11 - chdir */
  33 #define SYS_pipe        13      /* 42 - time */
  34 #define SYS_stat        14      /* 106 - mknod */
  35 #define SYS_chmod       15
  36 #define SYS_chown       16      /* 202 - lchown */
  37 #define SYS_utime       17      /* 30 - break */
  38 #define SYS_wait        18      /* n/a - oldstat */
  39 #define SYS_lseek       19      /*x*/
  40 #define SYS_getpid      20
  41 #define SYS_isatty      21      /* n/a - mount */
  42 #define SYS_fstat       22      /* 108 - oldumount */
  43 #define SYS_time        23      /* 13 - setuid */
  44 #define SYS_gettimeofday 24     /*x 78 - getuid (not implemented on WIN32) */
  45 #define SYS_times       25      /*X 43 - stime (Xtensa-specific implementation) */
  46 #define SYS_socket      26
  47 #define SYS_sendto      27
  48 #define SYS_recvfrom    28
  49 #define SYS_select_one  29      /* not compitible select, one file descriptor at the time */
  50 #define SYS_bind        30
  51 #define SYS_ioctl       31
  52
  53 #define SYS_iss_argc    1000    /* returns value of argc */
  54 #define SYS_iss_argv_size 1001  /* bytes needed for argv & arg strings */
  55 #define SYS_iss_set_argv 1002   /* saves argv & arg strings at given addr */
  56
  57 /*
  58  * SYS_select_one specifiers
  59  */
  60
  61 #define  XTISS_SELECT_ONE_READ    1
  62 #define  XTISS_SELECT_ONE_WRITE   2
  63 #define  XTISS_SELECT_ONE_EXCEPT  3
  64
  65 static int errno;
  66
  67 static inline int __simc(int a, int b, int c, int d)
  68 {
  69         int ret;
  70         register int a1 asm("a2") = a;
  71         register int b1 asm("a3") = b;
  72         register int c1 asm("a4") = c;
  73         register int d1 asm("a5") = d;
  74         __asm__ __volatile__ (
  75                         "simcall\n"
  76                         "mov %0, a2\n"
  77                         "mov %1, a3\n"
  78                         : "=a" (ret), "=a" (errno), "+r"(a1), "+r"(b1)
  79                         : "r"(c1), "r"(d1)
  80                         : "memory");
  81         return ret;
  82 }
  83
  84 static inline int simc_exit(int exit_code)
  85 {
  86         return __simc(SYS_exit, exit_code, 0, 0);
  87 }
  88
  89 static inline int simc_open(const char *file, int flags, int mode)
  90 {
  91         return __simc(SYS_open, (int) file, flags, mode);
  92 }
  93
  94 static inline int simc_close(int fd)
  95 {
  96         return __simc(SYS_close, fd, 0, 0);
  97 }
  98
  99 static inline int simc_ioctl(int fd, int request, void *arg)
 100 {
 101         return __simc(SYS_ioctl, fd, request, (int) arg);
 102 }
 103
 104 static inline int simc_read(int fd, void *buf, size_t count)
 105 {
 106         return __simc(SYS_read, fd, (int) buf, count);
 107 }
 108
 109 static inline int simc_write(int fd, const void *buf, size_t count)
 110 {
 111         return __simc(SYS_write, fd, (int) buf, count);
 112 }
 113
 114 static inline int simc_poll(int fd)
 115 {
 116         struct timeval tv = { .tv_sec = 0, .tv_usec = 0 };
 117
 118         return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv);
 119 }
 120
 121 static inline int simc_lseek(int fd, uint32_t off, int whence)
 122 {
 123         return __simc(SYS_lseek, fd, off, whence);
 124 }
 125
 126 static inline int simc_argc(void)
 127 {
 128         return __simc(SYS_iss_argc, 0, 0, 0);
 129 }
 130
 131 static inline int simc_argv_size(void)
 132 {
 133         return __simc(SYS_iss_argv_size, 0, 0, 0);
 134 }
 135
 136 static inline void simc_argv(void *buf)
 137 {
 138         __simc(SYS_iss_set_argv, (int)buf, 0, 0);
 139 }
 140
 141 #endif /* _XTENSA_PLATFORM_ISS_SIMCALL_H */
 142