2010-12-02 Jayant Sonar jayant.sonar@kpitcummins.com

            Kaushik Phatak  kaushik.phatak@kpitcummins.com

        * configure.in: Add CR16 support.
        * configure: Regenerated.
        * cr16/aclocal.m4: New.
        * cr16/close.c: New.
        * cr16/configure: New.
        * cr16/configure.in: New.
        * cr16/crt1.S: New.
        * cr16/crti.S: New.
        * cr16/crtn.S: New.
        * cr16/dvz_hndl.c: New.
        * cr16/_exit.c: New.
        * cr16/flg_hndl.c: New.
        * cr16/fstat.c: New.
        * cr16/_getenv.c: New.
        * cr16/getpid.c: New.
        * cr16/iad_hndl.c: New.
        * cr16/intable.c: New.
        * cr16/isatty.c: New.
        * cr16/kill.c: New.
        * cr16/lseek.c: New.
        * cr16/Makefile.in: New.
        * cr16/open.c: New.
        * cr16/putnum.c: New.
        * cr16/read.c: New.
        * cr16/_rename.c: New.
        * cr16/sbrk.c: New.
        * cr16/sim.ld: New.
        * cr16/stat.c: New.
        * cr16/svc_hndl.c: New.
        * cr16/time.c: New.
        * cr16/und_hndl.c: New.
        * cr16/unlink.c: New.
        * cr16/write.c: New.

1 files changed, 98 insertions, 0 deletions

diff --git a/libgloss/cr16/crt1.S b/libgloss/cr16/crt1.S
new file mode 100644
index 000000000..eee6fc10b
--- /dev/null
+++ b/libgloss/cr16/crt1.S
@@ -0,0 +1,98 @@
+ ##############################################################################
+ # crt0.s -- CR16 default start-up routine                                    #
+ #                                                                            #
+ # Copyright (c) 2004 National Semiconductor Corporation                      #
+ #                                                                            #
+ # The authors hereby grant permission to use, copy, modify, distribute,      #
+ # and license this software and its documentation for any purpose, provided  #
+ # that existing copyright notices are retained in all copies and that this   #
+ # notice is included verbatim in any distributions. No written agreement,    #
+ # license, or royalty fee is required for any of the authorized uses.        #
+ # Modifications to this software may be copyrighted by their authors         #
+ # and need not follow the licensing terms described here, provided that      #
+ # the new terms are clearly indicated on the first page of each file where   #
+ # they apply.                                                                #
+ #                                                                            #
+ # This is the  start routine of your CR16 program.                           #
+ # It is linked with your application automatically. You can use              #
+ # this routine as a template and modify it to your needs, yet this           #
+ # file must be supplied for the compiler.                                    #
+ # It is assumed that the following symbols are defined in your linker        #
+ # script: __STACK_START, __ISTACK_START                                      #
+ ##############################################################################
+
+	.text
+#ifdef __CR16CP__
+	.align 4
+#else
+	.align 2
+#endif
+	.global	_main
+	.global	_atexit
+	.global	_exit
+	.global	_start
+	.global	__fini
+	.global	__init
+	.global	__STACK_START
+	.global	__ISTACK_START
+
+_start:
+
+ #----------------------------------------------------------------------------#
+ # Initialize the stack pointers. The constants __STACK_START and             #
+ # __ISTACK_START should be defined in the linker script.                     #
+
+	movd	$__STACK_START, (sp)
+
+	movd	$__ISTACK_START, (r1,r0)
+	lprd	(r1,r0), isp
+
+ #----------------------------------------------------------------------------#
+ # Initialize the default sections according to the linker script.            #
+
+#	bal 	(ra), __init_bss_data
+
+ #----------------------------------------------------------------------#
+ # Set the Extended Dispatch bit in the CFG register. This is the       #
+ # default configuration for CR16C.                                     #
+
+	spr	cfg, r0			# Set dispatch table width
+	orw	$0x100, r0
+	lpr	r0, cfg
+
+ #----------------------------------------------------------------------------#
+
+
+ #----------------------------------------------------------------------------#
+ # Handle global and static constructurs execution and setup                  #
+ # destructors to be called from exit.                                        #
+
+	bal	(ra),__init
+	movd	$__fini@c, (r3,r2)
+	bal     (ra), _atexit
+
+ #----------------------------------------------------------------------------#
+ # Jump to the main function in your application.                             #
+
+#ifdef __INT32__
+	movd    $0, (r3,r2) # Number of arguments
+	movd    $0, (r5,r4) # conatins pointer to argument string.
+#else
+	movw    $0, r2      # Number of arguments
+	movd    $0, (r4,r3) # conatins pointer to argument string.
+#endif
+	bal		(ra), _main
+
+ #----------------------------------------------------------------------------#
+ # Upon returning from the main function (if it isn't an infinite loop),      #
+ # jump to the exit function. The exit function is located in the             #
+ # library 'libc.a'.                                                          #
+
+#ifdef __INT32__
+	movd	(r1,r0), (r3,r2) # _main return value gets forwarded.
+#else
+	movw	r0, r2		# _main return value gets forwarded.
+#endif
+	br		_exit		# returns control to the functional simulator.
+
+