From 2570cc6430cf191b2b0f71b9dcfed46c94a645dc Mon Sep 17 00:00:00 2001
From: Michal Simek <michal.simek@xilinx.com>
Date: Wed, 12 Aug 2020 12:17:53 +0200
Subject: [PATCH] xilinx: common: Change bootm_size variable setting
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 581c88ad49..eab389d049 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__);
--
2.39.5