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uImage: 使用gzip compressed方式生成uImage
UBOOT解压缩内核比内核自解压要快1.6s,可以提高启动速度。 不压缩是最快的,lzo稍慢,以后有机会可以迁移到lzo压缩方式。
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@@ -61,7 +61,7 @@ endif
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quiet_cmd_uimage = UIMAGE $@
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cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A arm -O linux -T kernel \
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-C none -a $(LOADADDR) -e $(STARTADDR) \
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-C gzip -a $(LOADADDR) -e $(STARTADDR) \
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-n 'Linux-$(KERNELRELEASE)' -d $< $@
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ifeq ($(CONFIG_ZBOOT_ROM),y)
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@@ -77,9 +77,13 @@ else
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$(obj)/uImage: STARTADDR=$(LOADADDR)
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endif
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$(obj)/uImage: $(obj)/zImage FORCE
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$(obj)/Image.gz: $(obj)/Image FORCE
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$(call if_changed,gzip)
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@echo ' Image: $@ is ready'
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$(obj)/uImage: $(obj)/Image.gz FORCE
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$(call if_changed,uimage)
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@echo ' Image $@ is ready'
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@echo ' Image: $@ is ready'
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$(obj)/bootp/bootp: $(obj)/zImage initrd FORCE
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$(Q)$(MAKE) $(build)=$(obj)/bootp $@
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