The older 16 KiB limit was overly optimistic. The FEL SPL binary is loaded at the address 0x2000 (which is also the entry point), and the stack pointer is set by the FEL BROM code to 0x5E00 on Allwinner A20 right at the start. This gives us around 15872 bytes for everything (code, data and stack). Considering that the stack usage is somewhere between 1 KiB and 1.5 KiB (mostly because of printf buffers), setting 14 KiB as the FEL SPL size limit is reasonable.
Signed-off-by: Siarhei Siamashka siarhei.siamashka@gmail.com --- include/configs/sunxi-common.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h index c644ad4..85965f4 100644 --- a/include/configs/sunxi-common.h +++ b/include/configs/sunxi-common.h @@ -155,7 +155,7 @@
#define CONFIG_SPL_START_S_PATH "arch/arm/cpu/armv7/sunxi" #define CONFIG_SPL_TEXT_BASE 0x2000 -#define CONFIG_SPL_MAX_SIZE 0x4000 /* 16 KiB */ +#define CONFIG_SPL_MAX_SIZE 0x3800 /* 14 KiB */
#else /* CONFIG_SPL */