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>

diff --git a/arch/xtensa/platforms/iss/include/platform/simcall-iss.h b/arch/xtensa/platforms/iss/include/platform/simcall-iss.h
new file mode 100644 (file)
index 0000000..5a1e7a1
--- /dev/null
+++ b/arch/xtensa/platforms/iss/include/platform/simcall-iss.h
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2021 Cadence Design Systems Inc. */
+
+#ifndef _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H
+#define _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H
+
+/*
+ *  System call like services offered by the simulator host.
+ */
+
+#define SYS_nop                0       /* unused */
+#define SYS_exit       1       /*x*/
+#define SYS_fork       2
+#define SYS_read       3       /*x*/
+#define SYS_write      4       /*x*/
+#define SYS_open       5       /*x*/
+#define SYS_close      6       /*x*/
+#define SYS_rename     7       /*x 38 - waitpid */
+#define SYS_creat      8       /*x*/
+#define SYS_link       9       /*x (not implemented on WIN32) */
+#define SYS_unlink     10      /*x*/
+#define SYS_execv      11      /* n/a - execve */
+#define SYS_execve     12      /* 11 - chdir */
+#define SYS_pipe       13      /* 42 - time */
+#define SYS_stat       14      /* 106 - mknod */
+#define SYS_chmod      15
+#define SYS_chown      16      /* 202 - lchown */
+#define SYS_utime      17      /* 30 - break */
+#define SYS_wait       18      /* n/a - oldstat */
+#define SYS_lseek      19      /*x*/
+#define SYS_getpid     20
+#define SYS_isatty     21      /* n/a - mount */
+#define SYS_fstat      22      /* 108 - oldumount */
+#define SYS_time       23      /* 13 - setuid */
+#define SYS_gettimeofday 24    /*x 78 - getuid (not implemented on WIN32) */
+#define SYS_times      25      /*X 43 - stime (Xtensa-specific implementation) */
+#define SYS_socket      26
+#define SYS_sendto      27
+#define SYS_recvfrom    28
+#define SYS_select_one  29      /* not compatible select, one file descriptor at the time */
+#define SYS_bind        30
+#define SYS_ioctl      31
+
+#define SYS_iss_argc   1000    /* returns value of argc */
+#define SYS_iss_argv_size 1001 /* bytes needed for argv & arg strings */
+#define SYS_iss_set_argv 1002  /* saves argv & arg strings at given addr */
+
+/*
+ * SYS_select_one specifiers
+ */
+
+#define  XTISS_SELECT_ONE_READ    1
+#define  XTISS_SELECT_ONE_WRITE   2
+#define  XTISS_SELECT_ONE_EXCEPT  3
+
+static int errno;
+
+static inline int __simc(int a, int b, int c, int d)
+{
+       register int a1 asm("a2") = a;
+       register int b1 asm("a3") = b;
+       register int c1 asm("a4") = c;
+       register int d1 asm("a5") = d;
+       __asm__ __volatile__ (
+                       "simcall\n"
+                       : "+r"(a1), "+r"(b1)
+                       : "r"(c1), "r"(d1)
+                       : "memory");
+       errno = b1;
+       return a1;
+}
+
+#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H */

diff --git a/arch/xtensa/platforms/iss/include/platform/simcall.h b/arch/xtensa/platforms/iss/include/platform/simcall.h
index 5ba2454..612080b 100644 (file)
--- a/arch/xtensa/platforms/iss/include/platform/simcall.h
+++ b/arch/xtensa/platforms/iss/include/platform/simcall.h
@@ -6,78 +6,13 @@
  * for more details.
  *
  * Copyright (C) 2001 Tensilica Inc.
- * Copyright (C) 2017 Cadence Design Systems Inc.
+ * Copyright (C) 2017 - 2021 Cadence Design Systems Inc.
  */
 
 #ifndef _XTENSA_PLATFORM_ISS_SIMCALL_H
 #define _XTENSA_PLATFORM_ISS_SIMCALL_H
 
-
-/*
- *  System call like services offered by the simulator host.
- */
-
-#define SYS_nop                0       /* unused */
-#define SYS_exit       1       /*x*/
-#define SYS_fork       2
-#define SYS_read       3       /*x*/
-#define SYS_write      4       /*x*/
-#define SYS_open       5       /*x*/
-#define SYS_close      6       /*x*/
-#define SYS_rename     7       /*x 38 - waitpid */
-#define SYS_creat      8       /*x*/
-#define SYS_link       9       /*x (not implemented on WIN32) */
-#define SYS_unlink     10      /*x*/
-#define SYS_execv      11      /* n/a - execve */
-#define SYS_execve     12      /* 11 - chdir */
-#define SYS_pipe       13      /* 42 - time */
-#define SYS_stat       14      /* 106 - mknod */
-#define SYS_chmod      15
-#define SYS_chown      16      /* 202 - lchown */
-#define SYS_utime      17      /* 30 - break */
-#define SYS_wait       18      /* n/a - oldstat */
-#define SYS_lseek      19      /*x*/
-#define SYS_getpid     20
-#define SYS_isatty     21      /* n/a - mount */
-#define SYS_fstat      22      /* 108 - oldumount */
-#define SYS_time       23      /* 13 - setuid */
-#define SYS_gettimeofday 24    /*x 78 - getuid (not implemented on WIN32) */
-#define SYS_times      25      /*X 43 - stime (Xtensa-specific implementation) */
-#define SYS_socket      26
-#define SYS_sendto      27
-#define SYS_recvfrom    28
-#define SYS_select_one  29      /* not compatible select, one file descriptor at the time */
-#define SYS_bind        30
-#define SYS_ioctl      31
-
-#define SYS_iss_argc   1000    /* returns value of argc */
-#define SYS_iss_argv_size 1001 /* bytes needed for argv & arg strings */
-#define SYS_iss_set_argv 1002  /* saves argv & arg strings at given addr */
-
-/*
- * SYS_select_one specifiers
- */
-
-#define  XTISS_SELECT_ONE_READ    1
-#define  XTISS_SELECT_ONE_WRITE   2
-#define  XTISS_SELECT_ONE_EXCEPT  3
-
-static int errno;
-
-static inline int __simc(int a, int b, int c, int d)
-{
-       register int a1 asm("a2") = a;
-       register int b1 asm("a3") = b;
-       register int c1 asm("a4") = c;
-       register int d1 asm("a5") = d;
-       __asm__ __volatile__ (
-                       "simcall\n"
-                       : "+r"(a1), "+r"(b1)
-                       : "r"(c1), "r"(d1)
-                       : "memory");
-       errno = b1;
-       return a1;
-}
+#include <platform/simcall-iss.h>
 
 static inline int simc_exit(int exit_code)
 {
@@ -137,4 +72,3 @@ static inline void simc_argv(void *buf)
 }
 
 #endif /* _XTENSA_PLATFORM_ISS_SIMCALL_H */
-