When an MPC5200 based board is used with SPL support, the main U-Boot needs to clear the GD (global data) struct again.
Otherwise the generic board init code in board_init_f (when CONFIG_SYS_GENERIC_BOARD is defined) will not initialize all GD variables correctly. Resulting in a hangup on the a4m2k board.
Signed-off-by: Stefan Roese sr@denx.de Cc: Wolfgang Denk wd@denx.de --- arch/powerpc/cpu/mpc5xxx/start.S | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/arch/powerpc/cpu/mpc5xxx/start.S b/arch/powerpc/cpu/mpc5xxx/start.S index 02c706e..94eb0d3 100644 --- a/arch/powerpc/cpu/mpc5xxx/start.S +++ b/arch/powerpc/cpu/mpc5xxx/start.S @@ -76,6 +76,21 @@ _start: * been done in the SPL u-boot version. */ GET_GOT /* initialize GOT access */ + + /* + * The GD (global data) struct needs to get cleared. Lets do + * this by calling memset(). + * This function is called when the platform is build with SPL + * support from the main (full-blown) U-Boot. And the GD needs + * to get cleared (again) so that the following generic + * board support code, defined via CONFIG_SYS_GENERIC_BOARD, + * initializes all variables correctly. + */ + mr r3, r2 /* parameter 1: GD pointer */ + li r4,0 /* parameter 2: value to fill */ + li r5,GD_SIZE /* parameter 3: count */ + bl memset + bl board_init_f /* run 1st part of board init code (in Flash)*/ /* NOTREACHED - board_init_f() does not return */ #else