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authorGabor Juhos <juhosg@openwrt.org>2014-04-12 09:52:58 +0000
committerGabor Juhos <juhosg@openwrt.org>2014-04-12 09:52:58 +0000
commitfd53cfa31b7ecc69a452aee38b792e053a420255 (patch)
tree02835df3052314887faa5b70855a0fb42ef654ab /target/linux/ar71xx/image
parent1bce5e83284a9fb8c5c9eb3f53bf1335a3f52744 (diff)
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ar71xx: add comments for image Makefile.
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com> Patchwork: http://patchwork.openwrt.org/patch/5075/ Signed-off-by: Gabor Juhos <juhosg@openwrt.org> SVN-Revision: 40464
Diffstat (limited to 'target/linux/ar71xx/image')
-rw-r--r--target/linux/ar71xx/image/Makefile50
1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/ar71xx/image/Makefile b/target/linux/ar71xx/image/Makefile
index c9c2f56..6234ba2 100644
--- a/target/linux/ar71xx/image/Makefile
+++ b/target/linux/ar71xx/image/Makefile
@@ -13,6 +13,8 @@ JFFS2_BLOCKSIZE = 64k 128k 256k
rootfs_type=$(patsubst jffs2-%,jffs2,$(patsubst squashfs-%,squashfs,$(1)))
+# $(1): rootfs type.
+# $(2): board name.
define imgname
$(BIN_DIR)/$(IMG_PREFIX)-$(2)-$(call rootfs_type,$(1))
endef
@@ -41,13 +43,23 @@ endef
SINGLE_PROFILES:=
+# $(1) : name of image build method to be used, e.g., TPLINK-LZMA, AthLzma.
+# $(2) : name of the build template to be used, e.g. 64k, 64kraw, 128k, etc.
+# $(3) : name of the profile to be defined.
+# $(4) : board name.
+# $(5)~$(7) : arguments for $(mkcmdline)
+# board=$(1) console=$(2),$(3)
+# $(8)~$(12): extra arguments.
define SingleProfile
+ # $(1): action name, e.g. loader, buildkernel, squashfs, etc.
define Image/Build/Profile/$(3)
$$(call Image/Build/Template/$(2)/$$(1),$(1),$(4),$$(call mkcmdline,$(5),$(6),$(7)),$(8),$(9),$(10),$(11),$(12))
endef
SINGLE_PROFILES += $(3)
endef
+# $(1), name of the MultiProfile to be added.
+# $(2), name of Profiles to be included in the MultiProfile.
define MultiProfile
define Image/Build/Profile/$(1)
$(foreach p,$(2),
@@ -62,6 +74,9 @@ KDIR_TMP:=$(KDIR)/tmp
VMLINUX:=$(BIN_DIR)/$(IMG_PREFIX)-vmlinux
UIMAGE:=$(BIN_DIR)/$(IMG_PREFIX)-uImage
+# $(1): input file.
+# $(2): output file.
+# $(3): extra arguments for lzma.
define CompressLzma
$(STAGING_DIR_HOST)/bin/lzma e $(1) -lc1 -lp2 -pb2 $(3) $(2)
endef
@@ -76,6 +91,10 @@ define PatchKernel/initramfs
cp $(KDIR_TMP)/vmlinux-initramfs-$(1) $(call imgname,initramfs,$(1)).bin
endef
+# $(1): board name.
+# $(2): kernel command line.
+# $(3): extra argumetns for lzma.
+# $(4): name suffix, e.g. "-initramfs".
define PatchKernelLzma
cp $(KDIR)/vmlinux$(4) $(KDIR_TMP)/vmlinux$(4)-$(1)
$(STAGING_DIR_HOST)/bin/patch-cmdline $(KDIR_TMP)/vmlinux$(4)-$(1) "$(strip $(2))"
@@ -89,12 +108,21 @@ define PatchKernelGzip
endef
ifneq ($(SUBTARGET),mikrotik)
+# $(1): compression method of the data.
+# $(2): extra arguments.
+# $(3): input data file.
+# $(4): output file.
define MkuImage
mkimage -A mips -O linux -T kernel -a 0x80060000 -C $(1) $(2) \
-e 0x80060000 -n 'MIPS OpenWrt Linux-$(LINUX_VERSION)' \
-d $(3) $(4)
endef
+# $(1): board name.
+# $(2): kernel command line.
+# $(3): extra arguments for lzma.
+# $(4): name suffix, e.g. "-initramfs".
+# $(5): extra arguments for mkimage.
define MkuImageLzma
$(call PatchKernelLzma,$(1),$(2),$(3),$(4))
$(call MkuImage,lzma,$(5),$(KDIR_TMP)/vmlinux$(4)-$(1).bin.lzma,$(KDIR_TMP)/vmlinux$(4)-$(1).uImage)
@@ -120,7 +148,12 @@ define MkuImageOKLI
endef
endif
+# $(1): name of the 1st file.
+# $(3): name of the 2nd file.
+# $(5): name of the output file.
+# $(6): padding size.
define CatFiles
+ # $(4): size limit of the output file.
if [ $(2) -eq 0 ]; then \
filename="$(3)"; fstype=$$$${filename##*\.}; \
case "$$$${fstype}" in \
@@ -141,6 +174,8 @@ define CatFiles
echo "Warning: $(5) is too big (> $(4) bytes)" >&2; \
rm -f $(5); \
fi; \
+ # $(2): size limit of the 1st file.
+ # $(4): size limit of the 2nd file.
else if [ $(2) -gt 262144 ]; then \
if [ `stat -c%s "$(1)"` -gt $(2) ]; then \
echo "Warning: $(1) is too big (> $(2) bytes)" >&2; \
@@ -149,6 +184,8 @@ define CatFiles
else \
( dd if=$(1) bs=$(2) conv=sync; dd if=$(3) ) > $(5); \
fi; fi; \
+ # $(2): padding size for the 2nd file.
+ # $(4): size limit of the output file.
else \
( dd if=$(1) bs=$(2) conv=sync; dd if=$(3) ) > $(5); \
if [ `stat -c%s $(5)` -gt $(4) ]; then \
@@ -158,6 +195,11 @@ define CatFiles
fi; fi
endef
+# $(1): rootfs type.
+# $(2): board name.
+# $(3): kernel image size limit.
+# $(4): rootfs image size limit.
+# $(5): padding argument for padjffs2.
Sysupgrade/KR=$(call CatFiles,$(2),$(3),$(KDIR)/root.$(1),$(4),$(call sysupname,$(1),$(5)))
Sysupgrade/KRuImage=$(call CatFiles,$(KDIR_TMP)/vmlinux-$(2).uImage,$(3),$(KDIR)/root.$(1),$(4),$(call sysupname,$(1),$(2)),$(5))
Sysupgrade/RKuImage=$(call CatFiles,$(KDIR)/root.$(1),$(4),$(KDIR_TMP)/vmlinux-$(2).uImage,$(3),$(call sysupname,$(1),$(2)))
@@ -875,7 +917,14 @@ define Jffs2Template
endef
endef
+# $(1): template name to be defined.
+# $(2): squashfs suffix to be used.
+# $(3): jffs2 suffix to be used.
define BuildTemplate
+ # $(1) : name of build method.
+ # $(2) : board name.
+ # $(3) : kernel command line.
+ # $(4)~$(8): extra arguments.
define Image/Build/Template/$(1)/initramfs
$$(call Image/Build/$$(1)/initramfs,initramfs,$$(2),$$(3),$$(4),$$(5),$$(6),$$(7),$$(8))
endef
@@ -1162,6 +1211,7 @@ endif
$(call Image/Build/Profile/$(if $(CONFIG_IB),Default,$(IMAGE_PROFILE)),loader)
endef
+# $(1): filesystem type.
define Image/Build
$(call Image/Build/$(call rootfs_type,$(1)),$(1))
$(call Image/Build/Profile/$(IMAGE_PROFILE),$(1))