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 */ 142 143