Hi: York
I set bootargs as the following steps:
=> env default mtdparts
=> printenv mtdparts
mtdparts=mtdparts=60000000.nor:1m(nor_bank0_rcw),1m(nor_bank0_uboot),1m(nor_bank0_uboot_env),1m(nor_bank0_fman_uconde),40m(nor_bank0_fit),1m(nor_bank4_rcw),1m(nor_bank4_uboot),1m(nor_bank4_uboot_env),1m(nor_bank4_fman_ucode),40m(nor_bank4_fit);7e800000.flash:1m(nand_uboot),1m(nand_uboot_env),20m(nand_fit);spi0.0:1m(uboot),5m(kernel),1m(dtb),9m(file_system)
=> env default bootargs
=> printenv bootargs
bootargs=console=ttyS0,115200 root=/dev/ram0 earlycon=uart8250,mmio,0x21c0500
${mtdparts}
The macro CONFIG_BOOTARGS only be extern as an char-string, and it will be
spliced into default_environment array .
const uchar default_environment[] = {
#ifdef CONFIG_BOOTARGS
"bootargs=" CONFIG_BOOTARGS "\0"
#endif
The variable we use to have $consoledev, $othbootargs was used in the
following cases:
858 #define CONFIG_BOOTCOMMAND \
859 "setenv bootargs root=/dev/ram rw " \
860 "console=$consoledev,$baudrate $othbootargs;" \
861 "setenv ramdiskaddr 0x02000000;" \
862 "setenv fdtaddr 0x00c00000;" \
863 "setenv loadaddr 0x1000000;" \
864 "bootm $loadaddr $ramdiskaddr $fdtaddr"
Because the "setenv" will be executed , So the variable could be extended.
What do you suggest?
Best Regards
Wenbin Song
> -----Original Message-----
> From: York Sun [mailto:york....@nxp.com]
> Sent: Wednesday, April 06, 2016 12:39 PM
> To: Wenbin Song <wenbin.s...@nxp.com>; Mingkai Hu
> <mingkai...@nxp.com>; u-boot@lists.denx.de
> Cc: Qianyu Gong <qianyu.g...@nxp.com>; Shaohui Xie
> <shaohui....@nxp.com>; Zhiqiang Hou <zhiqiang....@nxp.com>
> Subject: Re: [PATCH] armv8/ls1043a: Add MTD partition scheme
>
> On 04/05/2016 09:20 PM, Wenbin Song wrote:
> > Hi: York
> >
> > Do you mean that I should use $mtdpart to instead of
> "MTDPARTS_DEFAULT" ?
> >
> > As follows:
> > #define CONFIG_BOOTARGS "console=ttyS0,115200
> root=/dev/ram0 " \
> >
> > "earlycon=uart8250,mmio,0x21c0500 " \
> > "$mtdparts"
> >
> > If so, the variable $mtdparts can't be extend ,like that:
> >
> > root@ls1043aqds:~# cat /proc/cmdline
> > console=ttyS0,115200 root=/dev/ram0 earlycon=uart8250,mmio,0x21c0500
> > ${mtdparts}
> >
>
> What do you see "print bootargs" under U-Boot?
> I thought the variable can be extended when U-Boot runs the command. Like
> we used to have $consoledev, $othbootargs, etc.
>
> York
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