LXR linux/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
  65static int errno;
  66
  67static 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
  84static inline int simc_exit(int exit_code)
  85{
  86        return __simc(SYS_exit, exit_code, 0, 0);
  87}
  88
  89static inline int simc_open(const char *file, int flags, int mode)
  90{
  91        return __simc(SYS_open, (int) file, flags, mode);
  92}
  93
  94static inline int simc_close(int fd)
  95{
  96        return __simc(SYS_close, fd, 0, 0);
  97}
  98
  99static inline int simc_ioctl(int fd, int request, void *arg)
 100{
 101        return __simc(SYS_ioctl, fd, request, (int) arg);
 102}
 103
 104static inline int simc_read(int fd, void *buf, size_t count)
 105{
 106        return __simc(SYS_read, fd, (int) buf, count);
 107}
 108
 109static inline int simc_write(int fd, const void *buf, size_t count)
 110{
 111        return __simc(SYS_write, fd, (int) buf, count);
 112}
 113
 114static 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
 121static inline int simc_lseek(int fd, uint32_t off, int whence)
 122{
 123        return __simc(SYS_lseek, fd, off, whence);
 124}
 125
 126static inline int simc_argc(void)
 127{
 128        return __simc(SYS_iss_argc, 0, 0, 0);
 129}
 130
 131static inline int simc_argv_size(void)
 132{
 133        return __simc(SYS_iss_argv_size, 0, 0, 0);
 134}
 135
 136static 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
 143