UBI文件生成规则

今天看了marvell的UBI 文件生成的规则，对那几个参数逐渐明白了。

LOCAL_PATH := $(call my-dir)

#Generate UBI FS image, currently only Linux Host is supported.

MKFS.UBIFS := $(HOST_OUT_EXECUTABLES)/mkfs.ubifs

UBINIZE := $(HOST_OUT_EXECUTABLES)/ubinize

SYSTEM_UBINIZE_CFG:=$(LOCAL_PATH)/system_ubinize.cfg

USERDATA_UBINIZE_CFG:=$(LOCAL_PATH)/userdata_ubinize.cfg

MASSSTORAGE_UBINIZE_CFG:=$(LOCAL_PATH)/internal_storage_ubinize.cfg

# "system" partition: begin=0x11800000 size=0x7680000 (118MB)

# size of PEB:0x40000 (256KB or 262144)

# size of LEB:0x3F000 (252KB or 258048)

# -m : 2KiB

# -e : 252KB

# -c : Number-of-PEB=0x7680000/0x40000=0x1da, 10 blocks are reserved for bad block handling, so

#                         Number-of-LEB=0x1da - 10=0x1d0(or 464)

# vol_size= Number-of-LEB * size-of-LEB=0x1d0 * 0x3F000 = 0x7230000 (or 119734272 bytes or 114.18MB)

# vol_size need to write to system_ubinize.cfg

file := $(PRODUCT_OUT)/system_ubifs.img

$(file): $(PRODUCT_OUT)/system.img | $(MKFS.UBIFS)

@echo "Target system ubifs image: $@"

@$(MKFS.UBIFS) -x lzo -m 2KiB -e 258048 -c 393 -o $@ -d $(PRODUCT_OUT)/system/ -F 

# -m

# -s

# -p

file := $(PRODUCT_OUT)/system_ubi.img

$(file): $(PRODUCT_OUT)/system_ubifs.img | $(UBINIZE)

@echo "Target system ubi partition image: $@"

@CWD=$$(pwd) && cd $(PRODUCT_OUT) && $${CWD}/$(UBINIZE) -o $${CWD}/$@ -m 2KiB -p 256KiB -s 2KiB $${CWD}/$(SYSTEM_UBINIZE_CFG)

droidcore: $(file)

# "userdata" partition: begin=0x8800000 size=0x22c00000 (556MB)

# size of PEB:0x40000 (256KB or 262144)

# size of LEB:0x3F000 (252KB or 258048)

# -m : 2 KiB

# -e : 252KB

# -c : Number-of-PEB=0x13800000/0x40000=0x4E0, 10 blocks are reserved for bad block handling, so

#                         Number-of-LEB=0x4E0 - 10 = 0x4D6 (or 1238) 

# vol_size= Number-of-LEB * size-of-LEB =0x4D6 * 0x3F000 =0x130AA000( 319463424 or 304.664MB)

# vol_size need to write to userdata_ubinize.cfg

file := $(PRODUCT_OUT)/userdata_ubifs.img

$(file): $(PRODUCT_OUT)/userdata.img | $(MKFS.UBIFS)

@echo "Target userdata ubifs image: $@"

@$(MKFS.UBIFS) -m 2KiB -e 258048 -c 2143 -o $@ -d $(PRODUCT_OUT)/data/ -F 

file := $(PRODUCT_OUT)/userdata_ubi.img

$(file): $(PRODUCT_OUT)/userdata_ubifs.img | $(UBINIZE)

@echo "Target userdata ubi partition image: $@"

@CWD=$$(pwd) && cd $(PRODUCT_OUT) && $${CWD}/$(UBINIZE) -o $${CWD}/$@ -m 2KiB -p 256KiB -s 2KiB $${CWD}/$(USERDATA_UBINIZE_CFG)

droidcore: $(file)

# "massstorage" partition: begin=0x1c000000 size=0x13800000 (312MB)

# size of PEB:0x40000 (256KB or 262144)

# size of LEB:0x3F000 (252KB or 258048)

# -m : 2 KiB

# -e : 252KB

# -c : Number-of-PEB=0x22c00000/0x40000=0x8B0, 10 blocks are reserved for bad block handling, so

#                         Number-of-LEB=0x8B0 - 10(A) = 0x8A6 (or 2214) 

# vol_size= Number-of-LEB * size-of-LEB =0x8A6 * 0x3F000 =0x220DA000( 571318272 or 544.851MB)

file := $(PRODUCT_OUT)/internal_storage_ubifs.img

$(file): $(PRODUCT_OUT)/system.img | $(MKFS.UBIFS)

@echo "Target massstorage ubifs image: $@"

@mkdir -p $(PRODUCT_OUT)/internal_storage

@dd if=/dev/zero of=android_internal.img bs=512 count=500000

@mkfs.vfat android_internal.img

@CWD=$$(pwd) && mv $${CWD}/android_internal.img $(PRODUCT_OUT)/internal_storage

@$(MKFS.UBIFS) -m 2KiB -e 258048 -c 1167 -o $@ -d $(PRODUCT_OUT)/internal_storage 

file := $(PRODUCT_OUT)/internal_storage_ubi.img

$(file): $(PRODUCT_OUT)/internal_storage_ubifs.img | $(UBINIZE)

@echo "Target massstorage ubi partition image: $@"

@CWD=$$(pwd) && cd $(PRODUCT_OUT) && $${CWD}/$(UBINIZE) -o $${CWD}/$@ -m 2KiB -p 256KiB -s 2KiB $${CWD}/$(MASSSTORAGE_UBINIZE_CFG)

droidcore: $(file)