2001-11-08 Dennis Ehlin (ECS) <Dennis.Ehlin@ecs.ericsson.se>

	This modification is part of the submitted modifications necessary to
	support the IBM PPC405 family.  This submission was reviewed by
	Thomas Doerfler <Thomas.Doerfler@imd-systems.de> who ensured it did
	not negatively impact the ppc403 BSPs.  The submission and tracking
	process was captured as PR50.
	* ChangeLog, Makefile.am, README, bsp_specs, bsp_specs.dl, configure.ac,
	times, dlentry/.cvsignore, dlentry/Makefile.am, dlentry/dlentry.S,
	include/.cvsignore, include/Makefile.am, include/bsp.h,
	include/bspopts.h.in, include/coverhd.h, startup/.cvsignore,
	startup/Makefile.am, startup/bspclean.c, startup/bspstart.c,
	startup/linkcmds, startup/linkcmds.dl, startup/setvec.c,
	wrapup/.cvsignore, wrapup/Makefile.am: New files that are
	part of the new gen405 BSP.

3 files changed, 196 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/powerpc/gen405/dlentry/.cvsignore b/c/src/lib/libbsp/powerpc/gen405/dlentry/.cvsignore
new file mode 100644
index 0000000000..282522db03
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/gen405/dlentry/.cvsignore
@@ -0,0 +1,2 @@
+Makefile
+Makefile.in
diff --git a/c/src/lib/libbsp/powerpc/gen405/dlentry/Makefile.am b/c/src/lib/libbsp/powerpc/gen405/dlentry/Makefile.am
new file mode 100644
index 0000000000..62d8995315
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/gen405/dlentry/Makefile.am
@@ -0,0 +1,33 @@
+##
+## $Id$
+##
+
+AUTOMAKE_OPTIONS = foreign 1.4
+
+PGM = $(ARCH)/dlentry.rel
+
+S_FILES = dlentry.S
+S_O_FILES = $(S_FILES:%.S=$(ARCH)/%.o)
+
+OBJS = $(S_O_FILES)
+
+include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg
+include $(top_srcdir)/../../../../../../automake/compile.am
+include $(top_srcdir)/../../../../../../automake/lib.am
+
+#
+# (OPTIONAL) Add local stuff here using +=
+#
+
+$(PGM): $(OBJS)
+	$(make-rel)
+
+# the .rel file built here will be put into libbsp.a by ../wrapup/Makefile
+
+all-local: $(ARCH) $(OBJS) $(PGM)
+
+.PRECIOUS: $(PGM)
+
+EXTRA_DIST = dlentry.S
+
+include $(top_srcdir)/../../../../../../automake/local.am
diff --git a/c/src/lib/libbsp/powerpc/gen405/dlentry/dlentry.S b/c/src/lib/libbsp/powerpc/gen405/dlentry/dlentry.S
new file mode 100644
index 0000000000..856e01cb06
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/gen405/dlentry/dlentry.S
@@ -0,0 +1,161 @@
+/*  dlentry.s
+ *
+ *  This file contains the entry code for RTEMS programs starting
+ *  after download to RAM
+ *
+ *  Author:	Thomas Doerfler <td@imd.m.isar.de>
+ *              IMD Ingenieurbuero fuer Microcomputertechnik
+ *
+ *  COPYRIGHT (c) 1998 by IMD
+ * 
+ *  Changes from IMD are covered by the original distributions terms.
+ *  This file has been derived from the papyrus BSP:	
+ *
+ *  This file contains the entry veneer for RTEMS programs
+ *  downloaded to Papyrus.
+ *
+ *  Author:	Andrew Bray <andy@i-cubed.co.uk>
+ *
+ *  COPYRIGHT (c) 1995 by i-cubed ltd.
+ *
+ *  To anyone who acknowledges that this file is provided "AS IS"
+ *  without any express or implied warranty:
+ *      permission to use, copy, modify, and distribute this file
+ *      for any purpose is hereby granted without fee, provided that
+ *      the above copyright notice and this notice appears in all
+ *      copies, and that the name of i-cubed limited not be used in
+ *      advertising or publicity pertaining to distribution of the
+ *      software without specific, written prior permission.
+ *      i-cubed limited makes no representations about the suitability
+ *      of this software for any purpose.
+ *
+ *  $Id$
+ *
+ *  derived from "helas403/dlentry.S":	
+ *  Id: dlentry.S,v 1.2 2000/08/02 16:30:57 joel Exp 
+ */
+
+#include "asm.h"
+
+/*
+ *  The gen405 ELF link scripts support three special sections:
+ *    .entry    The actual entry point
+ *    .vectors  The section containing the interrupt entry veneers.
+ */
+
+/*
+ *  Downloaded code loads the vectors separately to 0x00000100,
+ *  so .entry can be over 256 bytes.
+ *
+ *  The other sections are linked in the following order:
+ *    .entry
+ *    .text
+ *    .data
+ *    .bss
+ * see linker command file for section placement	
+ *
+ *  The initial stack is set to stack.end
+ *
+ *  All the entry veneer has to do is to clear the BSS.
+ */
+
+/*
+ *  GDB likes to have debugging information for the entry veneer.
+ *  Here was some DWARF information. IMD removed it, because we
+ *  could not check, whether it was still correct. Sorry.
+	
+ */
+
+.globl __eabi 
+
+				
+#if PPC_ASM == PPC_ASM_ELF
+        .section .entry
+#else
+	.csect .text[PR]
+#endif
+
+	PUBLIC_VAR (download_entry)
+SYM(download_entry):
+	bl	.startup
+base_addr:	
+
+/*---------------------------------------------------------------------------
+ * Parameters from linker
+ *--------------------------------------------------------------------------*/
+toc_pointer:	
+#if PPC_ASM == PPC_ASM_ELF
+	.long	s.got
+#else
+	.long	TOC[tc0]
+#endif
+bss_length:	
+	.long	bss.size
+bss_addr:	
+	.long	bss.start
+stack_top:
+	.long	stack.end
+/*---------------------------------------------------------------------------
+ * Reset_entry.
+ *--------------------------------------------------------------------------*/
+.startup:
+	/* Get start address, stack grows down from here... */
+	mflr	r1
+
+	/* Assume Bank regs set up..., cache etc. */
+        bl      bssclr
+
+	.extern SYM(__vectors)
+
+	lis	r2,__vectors@h          /* set EVPR exc. vector prefix */
+	mtspr	evpr,r2	
+
+        /*-------------------------------------------------------------------
+         * C_setup.
+         *------------------------------------------------------------------*/
+        lwz     r2,toc_pointer-base_addr(r1)       /* set r2 to toc */
+        lwz     r1,stack_top-base_addr(r1)         /* set r1 to stack_top */
+
+        addi    r1,r1,-56-4              /* start stack at text_addr - 56 */
+        addi    r3,r0,0x0                /* clear r3 */
+	stw	r3, 0(r1)		 /* Clear stack chain */
+	stw	r3, 4(r1)
+	stw	r3, 8(r1)
+	stw	r3, 12(r1)
+        lis	r5,environ@ha
+        la	r5,environ@l(r5)	/* environp */
+	li	r4, 0			/* argv */
+	li	r3, 0			/* argc */
+        .extern SYM (boot_card)
+        b       SYM (boot_card) 	 /* call the first C routine */
+
+/*---------------------------------------------------------------------------
+ * bssclr.
+ *--------------------------------------------------------------------------*/
+bssclr:
+        /*-------------------------------------------------------------------
+         * Data move finished, zero out bss.
+         *------------------------------------------------------------------*/
+        lwz     r2,bss_addr-base_addr(r1)   /* start of bss set by loader */
+        lwz     r3,bss_length-base_addr(r1) /* bss length */
+        rlwinm. r3,r3,30,0x3FFFFFFF     /* form length/4 */
+        beqlr                           /* no bss */
+        mtctr   r3                      /* set ctr reg */
+        xor     r6,r6,r6                /* r6 = 0 */
+clear_bss:
+        stswi   r6,r2,0x4               /* store r6 */
+        addi    r2,r2,0x4               /* update r2 */
+        bdnz    clear_bss               /* decrement counter and loop */
+        blr                             /* return */
+.L_text_e:
+
+#if PPC_ABI == PPC_ABI_POWEROPEN
+	DESCRIPTOR (startup)
+#endif
+
+	.comm	environ,4,4
+
+/* no eabi */
+__eabi:
+    blr
+