58eae8361c
In the current multi image build process the DTBs end up uncompressed in the PBL. This can be annoying because the PBL is often very size constrained. This patch allows to put the DTBs in as lzo compressed binary into the PBL. Since lzo offers quite good compression ratios for DTBs no other compression algorithm has been implemented for now. Boards which want to use the compressed DTBs only have to change the __dtb_ prefix in the DTB name to __dtb_z_. Also they should select ARM_USE_COMPRESSED_DTB to make sure barebox supports uncompressing the DTB. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
76 lines
1.7 KiB
Bash
Executable file
76 lines
1.7 KiB
Bash
Executable file
#!/bin/bash
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name=$1
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dtb=$2
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imd=$3
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echo "#include <asm-generic/barebox.lds.h>"
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le32() {
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printf ".byte 0x%02x, 0x%02x, 0x%02x, 0x%02x\n" \
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$(($1 & 0xff)) \
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$((($1 >> 8) & 0xff)) \
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$((($1 >> 16) & 0xff)) \
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$((($1 >> 24) & 0xff))
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}
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FDTGET=scripts/dtc/fdtget
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if [ "$imd" = "y" ]; then
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echo ".section .barebox_imd_0.${name},\"a\""
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echo ".global __imd_${name}_start"
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echo "__imd_${name}_start:"
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compat=$($FDTGET -d notfound -t bi "$dtb" / compatible | sed "s^ ^,^g")
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if [ "$compat" != "notfound" ]; then
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compatlen=$($FDTGET -t s "$dtb" / compatible | wc -c)
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le32 0x640c8005
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le32 $compatlen
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echo ".byte " $compat
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echo ".balign 4"
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fi
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model=$($FDTGET -d notfound -t bi "$dtb" / model | sed "s^ ^,^g")
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if [ "$model" != "notfound" ]; then
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modellen=$($FDTGET -t s "$dtb" / model | wc -c)
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le32 0x640c8004
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le32 $modellen
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echo ".byte " $model
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echo ".balign 4"
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fi
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fi
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echo ".section .dtb.rodata.${name},\"a\""
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echo ".balign STRUCT_ALIGNMENT"
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echo ".global __dtb_${name}_start"
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echo "__dtb_${name}_start:"
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echo ".incbin \"$dtb\""
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echo "__dtb_${name}_end:"
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echo ".global __dtb_${name}_end"
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echo ".balign STRUCT_ALIGNMENT"
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lzop -f -9 $dtb -o $dtb.lzo
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if [ $? != 0 ]; then
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exit 1
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fi
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compressed=$(stat $dtb.lzo -c "%s")
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uncompressed=$(stat $dtb -c "%s")
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echo ".section .dtb.rodata.${name}.z,\"a\""
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echo ".balign STRUCT_ALIGNMENT"
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echo ".global __dtb_z_${name}_start"
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echo "__dtb_z_${name}_start:"
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printf ".word 0x%08x\n" 0x7b66bcbd
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printf ".word 0x%08x\n" $compressed
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printf ".word 0x%08x\n" $uncompressed
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echo ".incbin \"$dtb.lzo\""
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echo "__dtb_z_${name}_end:"
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echo ".global __dtb_z_${name}_end"
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echo ".balign STRUCT_ALIGNMENT"
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if [ "$imd" = "y" ]; then
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echo ".word __imd_${name}_start"
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fi
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