DSP

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

2019-07-13 17:25发布

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