[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 7

The attached patches provides part 7 of an architecture implementation for the
Tensilica Xtensa CPU series.

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 130 insertions, 0 deletions

diff --git a/include/asm-xtensa/xtensa/simcall.h b/include/asm-xtensa/xtensa/simcall.h
new file mode 100644
index 000000000000..a2b868929a49
--- /dev/null
+++ b/include/asm-xtensa/xtensa/simcall.h
@@ -0,0 +1,130 @@
+#ifndef SIMCALL_INCLUDED
+#define SIMCALL_INCLUDED
+
+/*
+ * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
+ *
+ * include/asm-xtensa/xtensa/simcall.h  -  Simulator call numbers
+ *
+ * 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) 2002 Tensilica Inc.
+ */
+
+
+/*
+ *  System call like services offered by the simulator host.
+ *  These are modeled after the Linux 2.4 kernel system calls
+ *  for Xtensa processors.  However not all system calls and
+ *  not all functionality of a given system call are implemented,
+ *  or necessarily have well defined or equivalent semantics in
+ *  the context of a simulation (as opposed to a Unix kernel).
+ *
+ *  These services behave largely as if they had been invoked
+ *  as a task in the simulator host's operating system
+ *  (eg. files accessed are those of the simulator host).
+ *  However, these SIMCALLs model a virtual operating system
+ *  so that various definitions, bit assignments etc
+ *  (eg. open mode bits, errno values, etc) are independent
+ *  of the host operating system used to run the simulation.
+ *  Rather these definitions are specific to the Xtensa ISS.
+ *  This way Xtensa ISA code written to use these SIMCALLs
+ *  can (in principle) be simulated on any host.
+ *
+ *  Up to 6 parameters are passed in registers a3 to a8
+ *  (note the 6th parameter isn't passed on the stack,
+ *   unlike windowed function calling conventions).
+ *  The return value is in a2.  A negative value in the
+ *  range -4096 to -1 indicates a negated error code to be
+ *  reported in errno with a return value of -1, otherwise
+ *  the value in a2 is returned as is.
+ */
+
+/* These #defines need to match what's in Xtensa/OS/vxworks/xtiss/simcalls.c */
+
+#define SYS_nop         0       /* n/a - setup; used to flush register windows */
+#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
+
+/*
+ *  Other...
+ */
+#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 */
+
+/*
+ * SIMCALLs for the ferret memory debugger. All are invoked by
+ * libferret.a ...  ( Xtensa/Target-Libs/ferret )
+ */
+#define SYS_ferret           1010
+#define SYS_malloc           1011
+#define SYS_free             1012
+#define SYS_more_heap        1013
+#define SYS_no_heap          1014
+
+
+/*
+ *  Extra SIMCALLs for GDB:
+ */
+#define SYS_gdb_break         -1        /* invoked by XTOS on user exceptions if EPC points
+                                           to a break.n/break, regardless of cause! */
+#define SYS_xmon_out          -2        /* invoked by XMON: ... */
+#define SYS_xmon_in           -3        /* invoked by XMON: ... */
+#define SYS_xmon_flush        -4        /* invoked by XMON: ... */
+#define SYS_gdb_abort         -5        /* invoked by XTOS in _xtos_panic() */
+#define SYS_gdb_illegal_inst  -6        /* invoked by XTOS for illegal instructions (too deeply) */
+#define SYS_xmon_init         -7        /* invoked by XMON: ... */
+#define SYS_gdb_enter_sktloop -8        /* invoked by XTOS on debug exceptions */
+
+/*
+ *  SIMCALLs for vxWorks xtiss BSP:
+ */
+#define SYS_setup_ppp_pipes   -83
+#define SYS_log_msg           -84
+
+/*
+ *  Test SIMCALLs:
+ */
+#define SYS_test_write_state  -100
+#define SYS_test_read_state   -101
+
+/*
+ * SYS_select_one specifiers
+ */
+#define  XTISS_SELECT_ONE_READ    1
+#define  XTISS_SELECT_ONE_WRITE   2
+#define  XTISS_SELECT_ONE_EXCEPT  3
+
+#endif /* !SIMCALL_INCLUDED */