diff --git a/grub2-xcat/grub2-res.tar.gz b/grub2-xcat/grub2-res.tar.gz
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Binary files /dev/null and b/grub2-xcat/grub2-res.tar.gz differ
diff --git a/grub2-xcat/grub2-xcat.spec b/grub2-xcat/grub2-xcat.spec
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+++ b/grub2-xcat/grub2-xcat.spec
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+Summary: grub2 resources generated by grub2-mknetdir
+Name: grub2-xcat
+Version: 1.0
+#Release: snap%(date +"%Y%m%d%H%M")
+Release: 1
+License: EPL
+Group: Applications/System
+Vendor: IBM Corp.
+Packager: IBM Corp.
+#Distribution: %{?_distribution:%{_distribution}}%{!?_distribution:%{_vendor}}
+Prefix: /tftpboot/boot/grub2
+BuildRoot: /var/tmp/%{name}-root
+BuildArch: noarch
+Source1: grub2-res.tar.gz
+
+Provides: grub2-xcat 
+Requires:/bin/sh
+
+
+%description
+grub2-xcat provides some grub2 resources generated by grub2-mknetdir,including grub2 modules and grub2 image.
+
+%define _binaries_in_noarch_packages_terminate_build   0
+
+%prep
+#cp ./grub2-res.tar.gz /root/rpmbuild/SOURCES/
+#%ifos linux
+#tar zxf %{SOURCE1}
+#%else
+#rm -rf tftpboot
+#cp %{SOURCE1} /opt/freeware/src/packages/BUILD
+#gunzip -f grub2-res.tar.gz
+#tar -xf grub2-res.tar
+#%endif
+
+%build
+
+%pre
+
+
+%install
+mkdir -p $RPM_BUILD_ROOT/%{prefix}/
+cd $RPM_BUILD_ROOT/%{prefix}/
+
+%ifos linux
+tar zxf %{SOURCE1}
+%else
+cp %{SOURCE1} $RPM_BUILD_ROOT/%{prefix}/
+gunzip -f grub2-res.tar.gz
+tar -xf grub2-res.tar
+%endif
+
+
+
+%post
+ln -s -f %{prefix}/powerpc-ieee1275/core.elf %{prefix}/grub2.ppc
+exit 0
+
+%clean
+
+
+%files
+#%{prefix}
+# one for sles, one for rhel. yes, it's ugly...
+%{prefix}/powerpc-ieee1275/
+%defattr(-,root,root)
+
+%postun
+
+if [ "$1" = "0"  ]; then
+   rm %{prefix}/grub2.ppc
+fi
+true
diff --git a/grub2-xcat/readme b/grub2-xcat/readme
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+++ b/grub2-xcat/readme
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+#build steps:
+1. 
+#cp ./grub2-res.tar.gz /root/rpmbuild/SOURCES/
+2.
+rpmbuild -bb ./grub2-xcat.spec
+
+
+#notes:
+the grub2-res.tar.gz is generated by:
+1.run the following cmd on a RHEL7-PPC64 node:
+#grub2-mknetdir  --net-directory=/tftpboot/
+#cd /tftpboot/boot/grub2/
+#tar -czvf /tmp/grub2-res.tar.gz ./powerpc-ieee1275/