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 60 static int errno; 61 62 static 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 79 static inline int simc_open(const char *file, int flags, int mode) 80 { 81 return __simc(SYS_open, (int) file, flags, mode); 82 } 83 84 static inline int simc_close(int fd) 85 { 86 return __simc(SYS_close, fd, 0, 0); 87 } 88 89 static inline int simc_ioctl(int fd, int request, void *arg) 90 { 91 return __simc(SYS_ioctl, fd, request, (int) arg); 92 } 93 94 static inline int simc_read(int fd, void *buf, size_t count) 95 { 96 return __simc(SYS_read, fd, (int) buf, count); 97 } 98 99 static inline int simc_write(int fd, const void *buf, size_t count) 100 { 101 return __simc(SYS_write, fd, (int) buf, count); 102 } 103 104 static 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 } 110 111 static 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