doc: imx: habv4: Add Secure Boot guide for i.MX6 and i.MX7 non-SPL targets

Add HABv4 documentation for non-SPL targets covering the
following topics:

- How to sign an securely boot an u-boot-dtb.imx image.
- How to extend the root of trust for additional boot images.
- Add 3 CSF examples.
- Add IVT generation script example.

Reviewed-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Utkarsh Gupta <utkarsh.gupta@nxp.com>
Signed-off-by: Breno Lima <breno.lima@nxp.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/doc/imx/habv4/script_examples/genIVT.pl b/doc/imx/habv4/script_examples/genIVT.pl
new file mode 100644
index 00000000000..84a4fcb16f3
--- /dev/null
+++ b/doc/imx/habv4/script_examples/genIVT.pl
@@ -0,0 +1,12 @@
+#! /usr/bin/perl -w
+use strict;
+open(my $out, '>:raw', 'ivt.bin') or die "Unable to open: $!";
+print $out pack("V", 0x412000D1); # Signature
+print $out pack("V", 0x80800000); # Load Address (*load_address)
+print $out pack("V", 0x0); # Reserved
+print $out pack("V", 0x0); # DCD pointer
+print $out pack("V", 0x0); # Boot Data
+print $out pack("V", 0x80EEA000); # Self Pointer (*ivt)
+print $out pack("V", 0x80EEA020); # CSF Pointer (*csf)
+print $out pack("V", 0x0); # Reserved
+close($out);