On Wed, Nov 26, 2025 at 11:41:14AM +0100, [email protected] wrote: > On Tuesday, November 25, 2025 17:35 CET, Tom Rini <[email protected]> wrote: > > > On Tue, Nov 25, 2025 at 05:14:12PM +0100, Alexander Feilke wrote: > > > > > From: Alexander Feilke <[email protected]> > > > > > > Description: U-Boot hangs silently during boot when enabling DEBUG in > > > lib/fdtdec.c > > > > > > Not sure if its really a bug or rather a configuration issue on my side. > > > > > > Minimal steps to reproduce: <see patch> > > > > > > The hang is caused by `panic("FDT overlap");` later inside the if block. > > > (see `lib/fdtdec.c:1279` in `fdt_find_separate(void)`) > > > > > > Additionally, no boot log can be seen because serial is initialized after > > > loading the devicetree in this boot stage (see `common/board_r.c:665` in > > > `initcall_run_r(void)`) > > > > > > Tested on i.MX6 with configs for tqma6d_mba6 and other tq boards that > > > aren't, > > > mainlined yet (tqma6ulx_mba6ul and tqma7d_mba7). > > > > > > Any idea what to look for to fix this on our side? > > > > > > Thanks in advance, > > > Alexander > > > > For very early failures you might need to look at enabling DEBUG_UART > > which wires in a more direct "just write this to serial port". > > > > -- > > Tom > > Thanks for pointing that out. The debug log shows that the global data is > still located in the SRAM after relocation. > Printing all variables involved in the panic condition shows, that the stack > pointer also overflowed, so there appear to be two separate issues. > > if (top > (void *)gd || top > (void *)&stack_ptr) { > > including top, sp and sys_init_sp_addr for completeness: > > <debug_uart> > FDT 8789d3a0 gd 0091de40 > top 878a7aa8 sp 878543e7 > sys_init_sp_addr 0091ff20 > FDT overlap > resetting ... > System reset not supported on this platform > ### ERROR ### Please RESET the board ### > > > Note: I don't use CUSTOM_SYS_INIT_SP_ADDR so the default is used. > GENERATED_GBL_DATA_SIZE is 0xe0 > > #define SYS_INIT_SP_ADDR (CFG_SYS_INIT_RAM_ADDR + CFG_SYS_INIT_RAM_SIZE > - GENERATED_GBL_DATA_SIZE) > #define CFG_SYS_INIT_RAM_ADDR IRAM_BASE_ADDR > #define CFG_SYS_INIT_RAM_SIZE IRAM_SIZE > > Do you have any idea how to address these two problems?
Are there similar configs upstream? I know that imx6 is not generally broken, I boot my mx6cuboxi on current next (and master recently) and it's not failing like that, for example. Also, adding in one of the imx custodians.. -- Tom
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