Linux kernel for arm32 requires dtb and initrd to be placed in low memory to work properly. This requirement is described in chapter 4b) and 5) in Linux documentation (Documentation/arm/booting.rst).
There is an issue on arm32 with 2GB of memory that bootm_size is bigger than Linux lowmem (for example with VMSPLIT_3G). That's why limit bootm size on these systems not to be above 768MB.
Signed-off-by: Michal Simek michal.simek@xilinx.com ---
board/xilinx/common/board.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/board/xilinx/common/board.c b/board/xilinx/common/board.c index 581c88ad49a4..eab389d049f2 100644 --- a/board/xilinx/common/board.c +++ b/board/xilinx/common/board.c @@ -78,11 +78,15 @@ void *board_fdt_blob_setup(void) int board_late_init_xilinx(void) { u32 ret = 0; + phys_size_t bootm_size = gd->ram_size; + + if (CONFIG_IS_ENABLED(ARCH_ZYNQ)) + bootm_size = min(bootm_size, (phys_size_t)(SZ_512M + SZ_256M));
ret |= env_set_hex("script_offset_f", CONFIG_BOOT_SCRIPT_OFFSET);
ret |= env_set_addr("bootm_low", (void *)gd->ram_base); - ret |= env_set_addr("bootm_size", (void *)gd->ram_size); + ret |= env_set_addr("bootm_size", (void *)bootm_size);
if (ret) printf("%s: Saving run time variables FAILED\n", __func__);