diff options
| author | Stefan Roese <sr@denx.de> | 2014-11-19 09:37:48 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2014-11-19 13:08:14 +0100 |
| commit | 5fc3494fdb00dd7894090ce0c21936815a575558 (patch) | |
| tree | 2e74ea32d67e67d6eafa4e5eaac061939bbe56fb | |
| parent | c07e8da1a47f795d01ce2c26996b262869c8638f (diff) | |
| download | u-boot-5fc3494fdb00dd7894090ce0c21936815a575558.tar.gz | |
powerpc: mpc52xx: Clear GD in the main U-Boot stage for SPL usage
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>
| -rw-r--r-- | arch/powerpc/cpu/mpc5xxx/start.S | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc5xxx/start.S b/arch/powerpc/cpu/mpc5xxx/start.S index 02c706ec63..94eb0d3fff 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 |