New files -- from rtems-LM-980406 which was based on an RTEMS from 12/97.

This was called the dmv170 BSP in that source tree but since the DMV171
is now obsolete, we have transitioned to the DMV177 and have no intention
of checking compatibility with any other models.

2 files changed, 173 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/powerpc/dmv177/start/Makefile.in b/c/src/lib/libbsp/powerpc/dmv177/start/Makefile.in
new file mode 100644
index 0000000000..10d2b8a9ea
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/dmv177/start/Makefile.in
@@ -0,0 +1,56 @@
+#
+#  $Id$
+#
+
+@SET_MAKE@
+srcdir = @srcdir@
+top_srcdir = @top_srcdir@
+VPATH = @srcdir@
+RTEMS_ROOT = @RTEMS_ROOT@
+PROJECT_ROOT = @PROJECT_ROOT@
+RTEMS_CUSTOM = $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
+
+PGMS=${ARCH}/start.o
+
+# C source names, if any, go here -- minus the .c
+C_PIECES=
+C_FILES=$(C_PIECES:%=%.c)
+C_O_FILES=$(C_PIECES:%=${ARCH}/%.o)
+
+H_FILES=
+
+# Assembly source names, if any, go here -- minus the .s
+S_PIECES=start
+S_FILES=$(S_PIECES:%=%.s)
+S_O_FILES=$(S_FILES:%.s=${ARCH}/%.o)
+
+SRCS=$(C_FILES) $(CC_FILES) $(H_FILES) $(S_FILES)
+OBJS=$(C_O_FILES) $(CC_O_FILES) $(S_O_FILES)
+
+include $(RTEMS_CUSTOM)
+include $(PROJECT_ROOT)/make/leaf.cfg
+
+#
+# (OPTIONAL) Add local stuff here using +=
+#
+
+DEFINES  +=
+CPPFLAGS +=
+CFLAGS   +=
+
+LD_PATHS  +=
+LD_LIBS   +=
+LDFLAGS   +=
+
+#
+# Add your list of files to delete here.  The config files
+#  already know how to delete some stuff, so you may want
+#  to just run 'make clean' first to see what gets missed.
+#  'make clobber' already includes 'make clean'
+#
+
+CLEAN_ADDITIONS +=
+CLOBBER_ADDITIONS +=
+
+all:	${ARCH} $(SRCS) $(OBJS) $(PGM)
+	$(INSTALL_VARIANT) -m 555 ${PGMS} ${PROJECT_RELEASE}/lib
diff --git a/c/src/lib/libbsp/powerpc/dmv177/start/start.s b/c/src/lib/libbsp/powerpc/dmv177/start/start.s
new file mode 100644
index 0000000000..1b471c0d8c
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/dmv177/start/start.s
@@ -0,0 +1,117 @@
+/*
+ * This is based on the mvme-crt0.S file from libgloss/rs6000.
+ * crt0.S -- startup file for PowerPC systems.
+ *
+ * Copyright (c) 1995 Cygnus Support
+ *
+ * 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.
+ *
+ *  $Id$
+ */
+
+#include <rtems/score/targopts.h>
+#include "ppc-asm.h"
+
+	.file	"start.s"
+	.section ".got2","aw"
+	.align	2
+
+.LCTOC1 = .+32768
+
+	.extern	FUNC_NAME(atexit)
+	.globl	FUNC_NAME(__atexit)
+	.section ".sdata","aw"
+	.align	2
+FUNC_NAME(__atexit):			/* tell C's eabi-ctor's we have an atexit function */
+	.long	FUNC_NAME(atexit)@fixup	/* and that it is to register __do_global_dtors */
+
+	.section ".fixup","aw"
+	.align	2
+	.long	FUNC_NAME(__atexit)
+
+	.section ".got2","aw"
+.Ltable = .-.LCTOC1
+	.long	.LCTOC1			/* address we think .LCTOC1 is loaded at */
+
+.Lbss_start = .-.LCTOC1
+	.long	__bss_start
+
+.Lend = .-.LCTOC1
+	.long	_end
+
+.Lstack = .-.LCTOC1			/* stack address if set by user */
+	.long	__stack
+
+	.text
+.Lptr:
+	.long .LCTOC1-.Laddr
+
+	.globl	_start
+	.type	_start,@function
+_start:
+	lis     r5,0
+	mr      r4,r5
+	ori     r4,r4,0x0000            /* 0x2030  */
+        mtmsr   r4
+
+/* Add special purpose register initialization based upon the console driver
+ * initialization of these registers   XXXXX
+ */
+
+	bl	.Laddr			/* get current address */
+	
+.Laddr:
+	mflr	r4			/* real address of .Laddr */
+	lwz	r5,(.Lptr-.Laddr)(r4)	/* linker generated address of .LCTOC1 */
+	add	r5,r5,r4		/* correct to real pointer */
+	lwz	r4,.Ltable(r5)		/* get linker's idea of where .Laddr is */
+	subf	r4,r4,r5		/* calculate difference between where linked and current */
+
+	/* clear bss */
+	lwz	r6,.Lbss_start(r5)	/* calculate beginning of the BSS */
+	lwz	r7,.Lend(r5)		/* calculate end of the BSS */
+	add	r6,r6,r4		/* adjust pointers */
+	add	r7,r7,r4
+
+	cmplw	1,r6,r7
+	bc	4,4,.Ldone
+
+	subf	r8,r6,r7		/* number of bytes to zero */
+	srwi	r9,r8,2			/* number of words to zero */
+	mtctr	r9
+	li	r0,0			/* zero to clear memory */
+	addi	r6,r6,-4		/* adjust so we can use stwu */
+.Lloop:
+	stwu	r0,4(r6)		/* zero bss */
+	bdnz	.Lloop
+
+.Ldone:
+
+	lwz	r0,.Lstack(r5)		/* stack address or 0 */
+	cmplwi	1,r0,0			/* equal to 0? */
+	bc	12,6,.Lnostack		/* use default stack if == 0 */
+	mr	sp,r0			/* use user defined stack */
+
+.Lnostack:
+	/* set up initial stack frame */
+	addi	sp,sp,-4		/* make sure we don't overwrite debug mem */
+	lis	r0,0
+	stw	r0,0(sp)		/* clear back chain */
+	stwu	sp,-56(sp)		/* push another stack frame */
+
+	/* Let her rip */
+	bl	FUNC_NAME(main)
+
+	/* return value from main is argument to exit */
+	bl	FUNC_NAME(exit)
+	trap
+.Lstart:
+	.size	_start,.Lstart-_start