Add MXS bootlets package

MXS platforms (imx23 and imx28) are relying on bootlets as their first
stage bootloaders, that can then either start a regular second stage
bootloader or directly a Linux kernel. However, the Makefile allows
only to build u-boot and linux images at the same time, which is
not very convenient as we will more likely use only one of them,
so we need to duplicate a bit what is already done so that we are able
to choose what we want to generate.

thomas.petazzoni@free-electrons.com:

 * Remove incorrect dependency on BR2_PACKAGE_ELFTOSB

 * Each board configuration option is for one board, not multiple
   boards, so use singular.

 * The i.MX28 support is for i.MX28 EVK only, reflect that in the
   option prompt and the option name.

 * Use 'generic-package' instead of GENTARGETS

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/boot/mxs-bootlets/barebox_ivt.bd b/boot/mxs-bootlets/barebox_ivt.bd
new file mode 100644
index 000000000..e02ddd68f
--- /dev/null
+++ b/boot/mxs-bootlets/barebox_ivt.bd
@@ -0,0 +1,34 @@
+// STMP378x ROM command script to load and run U-Boot
+
+sources {
+	power_prep="./power_prep/power_prep";
+	sdram_prep="./boot_prep/boot_prep";
+	barebox="./barebox";
+}
+
+section (0) {
+
+	//----------------------------------------------------------
+	// Power Supply initialization
+	//----------------------------------------------------------
+
+	load power_prep;
+	load ivt (entry = power_prep:_start) > 0x8000;
+	hab call 0x8000;
+
+	//----------------------------------------------------------
+	// SDRAM initialization
+	//----------------------------------------------------------
+
+	load sdram_prep;
+        load ivt (entry = sdram_prep:_start) > 0x8000;
+        hab call 0x8000;
+	//----------------------------------------------------------
+	//  Load and call u_boot - ELF ARM image
+	//----------------------------------------------------------
+
+        load barebox;
+        load ivt (entry = barebox:exception_vectors) > 0x8000;
+	hab call 0x8000;
+
+}