[PATCH] xilinx: common: Do not save fdt_blob to bss section

[Michal Simek]

pá 4. 9. 2020 v 16:41 odesílatel Michal Simek <michal.simek at xilinx.com> napsal:
>
> For SPL flow without specifying address for DT loading DTB is automatically
> appended behind U-Boot code. Specifically _end symbol is used. Just behind
> it there is place for bss section.
> It means if early code is using static variable and there is a write to
> this variable DTB file is corrupted if variable is located between DTB
> start and end.
> In this particular case offset of this variable from bss section start is
> very small (0x40) that's why DT is currupted which breaks this boot flow.
>
> Signed-off-by: Michal Simek <michal.simek at xilinx.com>
> ---
>
>  board/xilinx/common/board.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/board/xilinx/common/board.c b/board/xilinx/common/board.c
> index 569a418dbbff..06331cd88311 100644
> --- a/board/xilinx/common/board.c
> +++ b/board/xilinx/common/board.c
> @@ -45,7 +45,7 @@ int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
>  #if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
>  void *board_fdt_blob_setup(void)
>  {
> -       static void *fdt_blob;
> +       void *fdt_blob;
>
>  #if !defined(CONFIG_VERSAL_NO_DDR) && !defined(CONFIG_ZYNQMP_NO_DDR)
>         fdt_blob = (void *)CONFIG_XILINX_OF_BOARD_DTB_ADDR;
> --
> 2.28.0
>

Applied.
M

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs