From f73002bc015aa8518a88a98d2e305e8c2868bf50 Mon Sep 17 00:00:00 2001 From: Dirk Eibach Date: Mon, 3 Nov 2014 10:56:31 +0100 Subject: ppc: Fix ppc4xx CONFIG_SYS_GENERIC_BOARD I realized that with v2014.10 u-boot is not starting up on ppc4xx boards with CONFIG_SYS_GENERIC_BOARD set. I bisected it down to this: d54d7eb support blackfin board initialization in generic board_f With d29437a ppc: Make ppc4xx ready for CONFIG_SYS_GENERIC_BOARD I set gd to a defined value for ppc4xx in cpu_init_f(). I did not realize that the gd struct has also to be memset() to zero at this point. But at least commit d54d7eb assumes it is: @@ -516,11 +528,13 @@ static int reserve_malloc(void) /* (permanently) allocate a Board Info struct */ static int reserve_board(void) { - gd->start_addr_sp -= sizeof(bd_t); - gd->bd = (bd_t *)map_sysmem(gd->start_addr_sp, sizeof(bd_t)); - memset(gd->bd, '\0', sizeof(bd_t)); - debug("Reserving %zu Bytes for Board Info at: %08lx\n", - sizeof(bd_t), gd->start_addr_sp); + if (!gd->bd) { + gd->start_addr_sp -= sizeof(bd_t); + gd->bd = (bd_t *)map_sysmem(gd->start_addr_sp, sizeof(bd_t)); + memset(gd->bd, '\0', sizeof(bd_t)); + debug("Reserving %zu Bytes for Board Info at: %08lx\n", + sizeof(bd_t), gd->start_addr_sp); + } return 0; } #endif This might also be an issue on other architectures, so maintainers should check. Signed-off-by: Dirk Eibach Signed-off-by: Stefan Roese --- arch/powerpc/cpu/ppc4xx/cpu_init.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch') diff --git a/arch/powerpc/cpu/ppc4xx/cpu_init.c b/arch/powerpc/cpu/ppc4xx/cpu_init.c index 22561231cb..e5a0e21e36 100644 --- a/arch/powerpc/cpu/ppc4xx/cpu_init.c +++ b/arch/powerpc/cpu/ppc4xx/cpu_init.c @@ -451,6 +451,9 @@ cpu_init_f (void) #endif /* CONFIG_440SP/SPE || CONFIG_460EX/GT || CONFIG_405EX */ gd = (gd_t *)(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET); + + /* Clear initial global data */ + memset((void *)gd, 0, sizeof(gd_t)); } /* -- cgit v1.2.1