On Fri, Aug 27, 2010 at 21:07, Ardelean, Andrei <Andrei.Ardelean@xxxxxxx> wrote: > I am using MALTA board with 74K. > From your email I understand that the bootloader must uncompress the > Kernel before launching it, so the compressed Kernel cannot run and > decompress itself? Could you confirm? I am asking that because in some > book I have read that Linux can boot a compressed image and the Kernel > was able to uncompress itself, but maybe it was my misunderstanding. Linux itself indeed cannot decompress itself. It's decompressed either by the bootloader, or by the (pre-Linux) early startup code which is wrapped around the kernel. > -----Original Message----- > From: wu zhangjin [mailto:wuzhangjin@xxxxxxxxx] > Sent: Friday, August 27, 2010 1:09 PM > To: Ardelean, Andrei > Cc: linux-mips@xxxxxxxxxxxxxx > Subject: Re: Does Linux Mips support compressed Kernel? > > Hi, > > On 8/27/10, Ardelean, Andrei <Andrei.Ardelean@xxxxxxx> wrote: >> Hi, >> >> Does Linux Mips support compressed Kernel? > > The answer maybe yes for we have added the basic compressed kernel > support from 2.6.33: > > arch/mips/boot/compressed/ > > but which board are you using? I just checked the arch/mips/Kconfig of > 2.6.35 and only found the following boards enabled it: > > config MACH_ALCHEMY > bool "Alchemy processor based machines" > select SYS_SUPPORTS_ZBOOT > > config AR7 > bool "Texas Instruments AR7" > [snip] > select SYS_SUPPORTS_ZBOOT_UART16550 > > config MACH_LOONGSON > bool "Loongson family of machines" > select SYS_SUPPORTS_ZBOOT_UART16550 > > config MIPS_MALTA > bool "MIPS Malta board" > [snip] > select SYS_SUPPORTS_ZBOOT > >> How can I obtain it? >> > > If your board are not related to any of the ones above, then, you may > need to select SYS_SUPPORTS_ZBOOT for your board and try it. > > If it doesn't work, you may need to debug it with serial port or the > other methods. If your board have a 16550 compatible serial port, you > may be possible to select SYS_SUPPORTS_ZBOOT_UART16550 instead of > SYS_SUPPORTS_ZBOOT to enable the serial port debugging support, and at > last, to enable the serial port debugging output, you need to enable > CONFIG_DEBUG_ZBOOT. > > You can get more help from arch/mips/boot/compressed/ > > BTW, to enable the zboot support, the bootloader of your board may > need the capability to parse the elf file. > > Regards, > Wu Zhangjin > > -- Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
