[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>
diff --git a/include/asm-xtensa/xtensa/simcall.h b/include/asm-xtensa/xtensa/simcall.h
new file mode 100644
index 0000000..a2b8689
--- /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 */