Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / xtensa / platforms / iss / include / platform / simcall.h

diff --git a/kernel/arch/xtensa/platforms/iss/include/platform/simcall.h b/kernel/arch/xtensa/platforms/iss/include/platform/simcall.h
new file mode 100644 (file)
index 0000000..12b15ad
--- /dev/null
+++ b/kernel/arch/xtensa/platforms/iss/include/platform/simcall.h
@@ -0,0 +1,117 @@
+/*
+ * include/asm-xtensa/platform-iss/simcall.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 Tensilica 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 compitible select, one file descriptor at the time */
+#define SYS_bind        30
+#define SYS_ioctl      31
+
+/*
+ * 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)
+{
+       int ret;
+       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"
+                       "mov %0, a2\n"
+                       "mov %1, a3\n"
+                       : "=a" (ret), "=a" (errno), "+r"(a1), "+r"(b1)
+                       : "r"(c1), "r"(d1)
+                       : "memory");
+       return ret;
+}
+
+static inline int simc_open(const char *file, int flags, int mode)
+{
+       return __simc(SYS_open, (int) file, flags, mode);
+}
+
+static inline int simc_close(int fd)
+{
+       return __simc(SYS_close, fd, 0, 0);
+}
+
+static inline int simc_ioctl(int fd, int request, void *arg)
+{
+       return __simc(SYS_ioctl, fd, request, (int) arg);
+}
+
+static inline int simc_read(int fd, void *buf, size_t count)
+{
+       return __simc(SYS_read, fd, (int) buf, count);
+}
+
+static inline int simc_write(int fd, const void *buf, size_t count)
+{
+       return __simc(SYS_write, fd, (int) buf, count);
+}
+
+static inline int simc_poll(int fd)
+{
+       struct timeval tv = { .tv_sec = 0, .tv_usec = 0 };
+
+       return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv);
+}
+
+static inline int simc_lseek(int fd, uint32_t off, int whence)
+{
+       return __simc(SYS_lseek, fd, off, whence);
+}
+
+#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_H */
+