DSP

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(74)：initramfs

2019-07-13 17:25发布

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快乐虾 http://blog.csdn.net/lights_joy/ lights@hb165.com    本文适用于 ADI bf561 DSP 优视BF561EVB开发板 uclinux-2008r1.5-rc3(smp patch) Visual DSP++ 5.0(update 5)    欢迎转载，但请保留作者信息   默认情况下，内核使用了initramfs做为rootfs，而为了将rootfs与内核放在一起，在链接文件ldf中做了一下处理：          .init.ramfs          {          INPUT_SECTION_ALIGN(4)                ___initramfs_start = .;                INPUT_SECTIONS($LIBRARIES_SML3_CM(.init.ramfs))                ___initramfs_end = .;          } > MEM_UCLINUX_INIT_RAMFS .init.ramfs这个段其实只有一个数据，那就是rootfs。为此选择rootfs.initramfs这个文件，将之插入到内核中。建一个.s的汇编文件，插入两行代码： .section .init.ramfs,"a" .inc/binary "rootfs.initramfs" 这样，就可以将rootfs.initramfs文件的内容放到.init.ramfs段中了。 参考VDSP文档： INC/BINARY, Include Contents of a File The .INC/BINARY directive includes the content of file at the current location. You can control the search paths used via the -i command-line switch (click here). Syntax: .INC/BINARY [ symbol = ] "filename" [,skip [,count]] ; .INC/BINARY [ symbol[] = ] "filename" [,skip [,count]] ; where symbol – the name of a symbol to associate with the data being included from the filefilename – the name of the file to include. The argument is enclosed in double quotes. The skip argument skips a number of bytes from the start of the file. The count argument indicates the maximum number of bytes to read. Example: .SECTION data1; .VAR jim; .INC/BINARY sym[] = "bert",10,6; .VAR fred; .INC/BINARY Image1[] = "photos/Picture1.jpg";

1       参考资料

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(69)：SHARED_MEMORY(2009-02-20) uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(70)：保留VDSP的heap(2009-02-20) uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(71)：l1_data_sram_init的疑惑(2009-02-20) uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(72)：中断时SP的保存(2009-2-22) uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(73)：.init.setup(2009-02-27)