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, 35 insertions, 0 deletions

diff --git a/meta-xilinx-bsp/classes/xilinx-fetch-restricted.bbclass b/meta-xilinx-bsp/classes/xilinx-fetch-restricted.bbclass
new file mode 100644
index 00000000..a778ec7d
--- /dev/null
+++ b/meta-xilinx-bsp/classes/xilinx-fetch-restricted.bbclass
@@ -0,0 +1,35 @@
+# This class is setup to override the default fetching for the target recipe.
+# When fetching it forces PREMIRROR only fetching so that no attempts are made
+# to fetch the Xilinx downloads that are restricted to authenticated users only.
+#
+# The purpose of this class is to allow for automatation with pre-downloaded
+# content or content that is available with curated/user defined pre-mirrors
+# and or pre-populated downloads/ directories.
+
+python do_fetch() {
+    xilinx_restricted_url = "xilinx.com/member/forms/download"
+
+    src_uri = (d.getVar('SRC_URI') or "").split()
+    if len(src_uri) == 0:
+        return
+
+    for i in src_uri:
+        if xilinx_restricted_url in i:
+            # force the use of premirrors only, do not attempt download from xilinx.com
+            d.setVar("BB_FETCH_PREMIRRORONLY", "1")
+            break
+
+    try:
+        fetcher = bb.fetch2.Fetch(src_uri, d)
+        fetcher.download()
+    except bb.fetch2.NetworkAccess as e:
+        if xilinx_restricted_url in e.url:
+            # fatal on access to xilinx.com restricted downloads, print the url for manual download
+            bb.fatal("The following download cannot be fetched automatically. " \
+                "Please manually download the file and place it in the 'downloads' directory (or on an available PREMIRROR).\n" \
+                "  %s" % (e.url.split(";")[0]))
+        else:
+            bb.fatal(str(e))
+    except bb.fetch2.BBFetchException as e:
+        bb.fatal(str(e))
+}