On Tue, Sep 06, 2016 at 04:12:55PM +0200, Petr Kulhavy wrote:
On 06/09/16 16:00, Eric Nelson wrote:
Hi Tom,
On 09/06/2016 06:40 AM, Tom Rini wrote:
On Fri, Sep 02, 2016 at 10:53:58PM +0200, Petr Kulhavy wrote:
Another place this doesn't work (which is where it doesn't work for me) is when the console is already open and I can't easily take it away to shoot over the next stage via Y-MODEM.
Would it be possible to implement having the next stage also be sent via imx_usb_loader? ie there's examples today of doing u-boot.imx + kernel
- initrd via imx_usb_loader, so what would be needed for SPL +
u-boot.img (+ kenrel + initrd) via imx_usb_loader? Thanks!
SPL+u-boot.img could be bundled into a single image through the use of plugins which would require:
- updates to mkimage to support plugins, and
- Makefile updates to produce a third output (u-boot.imx?), and
- an update to SPL startup on i.MX to check for the plugin flag
and return to the boot ROM after startup (instead of loading U-Boot) if set.
Maybe this jumping to RBL forth and back is not needed at all. If the SPL+img was loaded as one chunk into DRAM instead of the on-chip RAM (would require DDR initialization via DCD as it happens for the IMX image) then the SPL could jump directly into the uboot image, couldn't it?
Yes but many of the use cases involve "get away from doing DCD script DDR init". That's basically what the u-boot.imx version does, there's the header up front that does DDR init and then u-boot is loaded into DRAM.