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xtensa: ISS: split simcall implementation from semihosting interface
Disconnect existing ISS simcall implementation from the semihosting interface to allow for alternative implementations selectable at configure time. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov
parent
4671076c4d
commit
54467c126b
73
arch/xtensa/platforms/iss/include/platform/simcall-iss.h
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73
arch/xtensa/platforms/iss/include/platform/simcall-iss.h
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@ -0,0 +1,73 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2021 Cadence Design Systems Inc. */
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#ifndef _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H
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#define _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H
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/*
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* System call like services offered by the simulator host.
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*/
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#define SYS_nop 0 /* unused */
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#define SYS_exit 1 /*x*/
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#define SYS_fork 2
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#define SYS_read 3 /*x*/
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#define SYS_write 4 /*x*/
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#define SYS_open 5 /*x*/
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#define SYS_close 6 /*x*/
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#define SYS_rename 7 /*x 38 - waitpid */
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#define SYS_creat 8 /*x*/
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#define SYS_link 9 /*x (not implemented on WIN32) */
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#define SYS_unlink 10 /*x*/
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#define SYS_execv 11 /* n/a - execve */
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#define SYS_execve 12 /* 11 - chdir */
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#define SYS_pipe 13 /* 42 - time */
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#define SYS_stat 14 /* 106 - mknod */
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#define SYS_chmod 15
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#define SYS_chown 16 /* 202 - lchown */
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#define SYS_utime 17 /* 30 - break */
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#define SYS_wait 18 /* n/a - oldstat */
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#define SYS_lseek 19 /*x*/
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#define SYS_getpid 20
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#define SYS_isatty 21 /* n/a - mount */
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#define SYS_fstat 22 /* 108 - oldumount */
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#define SYS_time 23 /* 13 - setuid */
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#define SYS_gettimeofday 24 /*x 78 - getuid (not implemented on WIN32) */
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#define SYS_times 25 /*X 43 - stime (Xtensa-specific implementation) */
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#define SYS_socket 26
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#define SYS_sendto 27
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#define SYS_recvfrom 28
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#define SYS_select_one 29 /* not compatible select, one file descriptor at the time */
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#define SYS_bind 30
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#define SYS_ioctl 31
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#define SYS_iss_argc 1000 /* returns value of argc */
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#define SYS_iss_argv_size 1001 /* bytes needed for argv & arg strings */
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#define SYS_iss_set_argv 1002 /* saves argv & arg strings at given addr */
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/*
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* SYS_select_one specifiers
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*/
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#define XTISS_SELECT_ONE_READ 1
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#define XTISS_SELECT_ONE_WRITE 2
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#define XTISS_SELECT_ONE_EXCEPT 3
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static int errno;
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static inline int __simc(int a, int b, int c, int d)
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{
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register int a1 asm("a2") = a;
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register int b1 asm("a3") = b;
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register int c1 asm("a4") = c;
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register int d1 asm("a5") = d;
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__asm__ __volatile__ (
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"simcall\n"
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: "+r"(a1), "+r"(b1)
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: "r"(c1), "r"(d1)
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: "memory");
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errno = b1;
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return a1;
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}
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#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H */
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@ -6,78 +6,13 @@
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* for more details.
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*
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* Copyright (C) 2001 Tensilica Inc.
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* Copyright (C) 2017 Cadence Design Systems Inc.
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* Copyright (C) 2017 - 2021 Cadence Design Systems Inc.
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*/
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#ifndef _XTENSA_PLATFORM_ISS_SIMCALL_H
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#define _XTENSA_PLATFORM_ISS_SIMCALL_H
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/*
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* System call like services offered by the simulator host.
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*/
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#define SYS_nop 0 /* unused */
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#define SYS_exit 1 /*x*/
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#define SYS_fork 2
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#define SYS_read 3 /*x*/
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#define SYS_write 4 /*x*/
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#define SYS_open 5 /*x*/
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#define SYS_close 6 /*x*/
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#define SYS_rename 7 /*x 38 - waitpid */
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#define SYS_creat 8 /*x*/
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#define SYS_link 9 /*x (not implemented on WIN32) */
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#define SYS_unlink 10 /*x*/
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#define SYS_execv 11 /* n/a - execve */
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#define SYS_execve 12 /* 11 - chdir */
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#define SYS_pipe 13 /* 42 - time */
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#define SYS_stat 14 /* 106 - mknod */
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#define SYS_chmod 15
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#define SYS_chown 16 /* 202 - lchown */
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#define SYS_utime 17 /* 30 - break */
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#define SYS_wait 18 /* n/a - oldstat */
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#define SYS_lseek 19 /*x*/
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#define SYS_getpid 20
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#define SYS_isatty 21 /* n/a - mount */
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#define SYS_fstat 22 /* 108 - oldumount */
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#define SYS_time 23 /* 13 - setuid */
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#define SYS_gettimeofday 24 /*x 78 - getuid (not implemented on WIN32) */
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#define SYS_times 25 /*X 43 - stime (Xtensa-specific implementation) */
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#define SYS_socket 26
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#define SYS_sendto 27
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#define SYS_recvfrom 28
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#define SYS_select_one 29 /* not compatible select, one file descriptor at the time */
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#define SYS_bind 30
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#define SYS_ioctl 31
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#define SYS_iss_argc 1000 /* returns value of argc */
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#define SYS_iss_argv_size 1001 /* bytes needed for argv & arg strings */
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#define SYS_iss_set_argv 1002 /* saves argv & arg strings at given addr */
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/*
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* SYS_select_one specifiers
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*/
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#define XTISS_SELECT_ONE_READ 1
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#define XTISS_SELECT_ONE_WRITE 2
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#define XTISS_SELECT_ONE_EXCEPT 3
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static int errno;
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static inline int __simc(int a, int b, int c, int d)
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{
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register int a1 asm("a2") = a;
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register int b1 asm("a3") = b;
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register int c1 asm("a4") = c;
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register int d1 asm("a5") = d;
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__asm__ __volatile__ (
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"simcall\n"
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: "+r"(a1), "+r"(b1)
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: "r"(c1), "r"(d1)
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: "memory");
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errno = b1;
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return a1;
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}
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#include <platform/simcall-iss.h>
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static inline int simc_exit(int exit_code)
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{
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@ -137,4 +72,3 @@ static inline void simc_argv(void *buf)
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}
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#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_H */
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