[PATCH] xilinx: common: change bootm_size to not go beyond ram_top

[Ricardo Salveti]

The available ram can be limited by ram_top as that depends on the
reserved memory nodes provided by the device-tree (via
board_get_usable_ram_top), so make sure to respect ram_top when setting
up bootm_size to avoid overlapping reserved memory regions (e.g. memory
used by OP-TEE).

The same logic is available in env_get_bootm_size when bootm_size is
not defined by the default environment.

Signed-off-by: Ricardo Salveti <ricardo at foundries.io>
---
 board/xilinx/common/board.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/board/xilinx/common/board.c b/board/xilinx/common/board.c
index 78a5d0efa86..4928fab2c96 100644
--- a/board/xilinx/common/board.c
+++ b/board/xilinx/common/board.c
@@ -389,6 +389,9 @@ int board_late_init_xilinx(void)
 	if (CONFIG_IS_ENABLED(ARCH_ZYNQ) || CONFIG_IS_ENABLED(MICROBLAZE))
 		bootm_size = min(bootm_size, (phys_size_t)(SZ_512M + SZ_256M));
 
+	if (gd->ram_base + bootm_size > gd->ram_top)
+		bootm_size = gd->ram_top - gd->ram_base;
+
 	ret |= env_set_hex("script_offset_f", CONFIG_BOOT_SCRIPT_OFFSET);
 
 	ret |= env_set_addr("bootm_low", (void *)gd->ram_base);
-- 
2.34.1