meta-xilinx: Restructuring meta-xilinx to support multiple layers

As discussed previously on mailing list, we are proceeding with layer
restructuring. For rocko release we will have the following layers

meta-xilinx
        ->meta-xilinx-bsp (current meta-xilinx)
        ->meta-xilinx-contrib

In the subsequent releases we will add other layers from Xilinx
meta-xilinx
        ->meta-xilinx-bsp (current meta-xilinx)
        ->meta-petalinux
        ->meta-xilinx-tools
        ->meta-xilinx-contrib

This will provide one clone to get all the required meta layers from
Xilinx for a complete solution, and the users can blacklist any layer
which they don't want to use using bblayer.conf.
This will enables us to help our vendors/partners to add their reference
designs, board definitions etc.

Recipe changes :
 * Move reference design zybo-linux-bd.bb to meta-xilinx-contrib
 * Move kernel patches realted to zybo-linux-bd-zynq7 board to
   meta-xilinx-contrib
 * Update README

Signed-off-by: Manjukumar Matha <manjukumar.harthikote-matha@xilinx.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-7/0004-gcc-config-microblaze-Use-default-ident-output-gener.patch b/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-7/0004-gcc-config-microblaze-Use-default-ident-output-gener.patch
new file mode 100644
index 00000000..3b8a2f5d
--- /dev/null
+++ b/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-7/0004-gcc-config-microblaze-Use-default-ident-output-gener.patch
@@ -0,0 +1,80 @@
+From 308ac81945b2674953797a9db4aee98397f88362 Mon Sep 17 00:00:00 2001
+From: Nathan Rossi <nathan@nathanrossi.com>
+Date: Sat, 27 May 2017 00:00:17 +1000
+Subject: [PATCH 4/4] gcc/config/microblaze: Use default ident output
+ generation
+
+Remove the MicroBlaze specific TARGET_ASM_OUTPUT_IDENT definition, and
+use the default.
+
+Signed-off-by: Nathan Rossi <nathan@nathanrossi.com>
+Upstream-Status: Unsubmitted
+---
+ gcc/config/microblaze/microblaze-protos.h |  1 -
+ gcc/config/microblaze/microblaze.c        | 24 ------------------------
+ gcc/config/microblaze/microblaze.h        |  2 +-
+ 3 files changed, 1 insertion(+), 26 deletions(-)
+
+diff --git a/gcc/config/microblaze/microblaze-protos.h b/gcc/config/microblaze/microblaze-protos.h
+index 9ba8f2d46f..b56e052ae4 100644
+--- a/gcc/config/microblaze/microblaze-protos.h
++++ b/gcc/config/microblaze/microblaze-protos.h
+@@ -51,7 +51,6 @@ extern int microblaze_regno_ok_for_base_p (int, int);
+ extern HOST_WIDE_INT microblaze_initial_elimination_offset (int, int);
+ extern void microblaze_declare_object (FILE *, const char *, const char *,
+    const char *, int);
+-extern void microblaze_asm_output_ident (const char *);
+ extern int microblaze_legitimate_pic_operand (rtx);
+ extern bool microblaze_tls_referenced_p (rtx);
+ extern int symbol_mentioned_p (rtx);
+diff --git a/gcc/config/microblaze/microblaze.c b/gcc/config/microblaze/microblaze.c
+index d0f86fd460..bba6983b65 100644
+--- a/gcc/config/microblaze/microblaze.c
++++ b/gcc/config/microblaze/microblaze.c
+@@ -3351,30 +3351,6 @@ microblaze_eh_return (rtx op0)
+   emit_insn (gen_movsi (gen_rtx_MEM (Pmode, stack_pointer_rtx), op0));
+ }
+ 
+-/* Queue an .ident string in the queue of top-level asm statements.
+-   If the string size is below the threshold, put it into .sdata2.
+-   If the front-end is done, we must be being called from toplev.c.
+-   In that case, do nothing.  */
+-void 
+-microblaze_asm_output_ident (const char *string)
+-{
+-  const char *section_asm_op;
+-  int size;
+-  char *buf;
+-
+-  if (symtab->state != PARSING)
+-    return;
+-
+-  size = strlen (string) + 1;
+-  if (size <= microblaze_section_threshold)
+-    section_asm_op = SDATA2_SECTION_ASM_OP;
+-  else
+-    section_asm_op = READONLY_DATA_SECTION_ASM_OP;
+-
+-  buf = ACONCAT ((section_asm_op, "\n\t.ascii \"", string, "\\0\"\n", NULL));
+-  symtab->finalize_toplevel_asm (build_string (strlen (buf), buf));
+-}
+-
+ static void
+ microblaze_elf_asm_init_sections (void)
+ {
+diff --git a/gcc/config/microblaze/microblaze.h b/gcc/config/microblaze/microblaze.h
+index 2c9ece1d6c..ccd77e8b4d 100644
+--- a/gcc/config/microblaze/microblaze.h
++++ b/gcc/config/microblaze/microblaze.h
+@@ -743,7 +743,7 @@ do {                                                                        \
+ #define STRING_ASM_OP                  "\t.asciz\t"
+ 
+ #undef TARGET_ASM_OUTPUT_IDENT
+-#define TARGET_ASM_OUTPUT_IDENT microblaze_asm_output_ident
++#define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive
+ 
+ /* Default to -G 8 */
+ #ifndef MICROBLAZE_DEFAULT_GVALUE
+-- 
+2.11.0
+