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xilinx: common: Change bootm_size variable setting

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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>
This commit is contained in:
Michal Simek 2020-08-12 12:17:53 +02:00
parent ca0f616530
commit 2570cc6430
1 changed files with 5 additions and 1 deletions
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6
board/xilinx/common/board.c
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@ -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__);