brcm47xx: image: build alternative TRX using less optimized LZMA

There is a group of devices that lzma-loader doesn't work with. They
simply hang at "Starting program at 0x80001000" which is really hard to
debug and we didn't find any solution for this for years.

Broadcom doesn't use lzma-loader on these devices anyway. They decided
to drop lzma-loader and use less optimal LZMA compression that can be
handled by CFE itself (it doesn't use dictionary).

So support these devices we will need kernel compressed with different
parameters and trx without a loader.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Backport of r42205

SVN-Revision: 42371

diff --git a/target/linux/brcm47xx/image/Makefile b/target/linux/brcm47xx/image/Makefile
index 584bb6cac6a21e28d3146118b9feee226d0ee9fb..d19a13ee60ca9184eaed22663015df447684a50f 100644 (file)
--- a/target/linux/brcm47xx/image/Makefile
+++ b/target/linux/brcm47xx/image/Makefile
@@ -12,7 +12,12 @@ define Build/Clean
 endef
 
 define Image/Prepare
+       # Optimized LZMA compression (with dictionary), handled by lzma-loader.
        cat $(KDIR)/vmlinux | $(STAGING_DIR_HOST)/bin/lzma e -si -so -eos -lc1 -lp2 -pb2 > $(KDIR)/vmlinux.lzma
+
+       # Less optimal LZMA compression (no dictionary), handled by CFE.
+       $(STAGING_DIR_HOST)/bin/lzma e -so -d16 $(KDIR)/vmlinux > $(KDIR)/vmlinux-nodictionary.lzma
+
        gzip -nc9 $(KDIR)/vmlinux > $(KDIR)/vmlinux.gz
 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
        cat $(KDIR)/vmlinux-initramfs | $(STAGING_DIR_HOST)/bin/lzma e -si -so -eos -lc1 -lp2 -pb2 > $(KDIR)/vmlinux-initramfs.lzma
@@ -230,6 +235,9 @@ define Image/Build
        $(STAGING_DIR_HOST)/bin/trx -o $(BIN_DIR)/$(IMG_PREFIX)-$(1).trx \
                -f $(KDIR)/loader.gz -f $(KDIR)/vmlinux.lzma \
                $(call trxalign/$(1),$(1))
+       $(STAGING_DIR_HOST)/bin/trx -o $(BIN_DIR)/$(IMG_PREFIX)-$(1)-noloader-nodictionary.trx \
+               -f $(KDIR)/vmlinux-nodictionary.lzma \
+               $(call trxalign/$(1),$(1))
        $(STAGING_DIR_HOST)/bin/trx -o $(BIN_DIR)/$(IMG_PREFIX)-$(1)-gz.trx \
                -f $(KDIR)/vmlinux.gz \
                $(call trxalign/$(1),$(1))