On 09.08.2018 23:42, Marek Vasut wrote:
On 08/09/2018 09:04 PM, Simon Goldschmidt wrote:
There were NULL pointers dereferenced because DM was used
too early without correct initialization:
- malloc_simple returned NULL when called from preloader_console_init()
because gd->malloc_limit was 0
- uclass_add dereferenced gd->uclass_root members which were NULL because
dm_init (or one of its relatives) has not been called.
All this is fixed by calling spl_early_init before calling
preloader_console_init.
This fixes commit 73172753f4f3 ("ARM: socfpga: Convert to DM serial")
Signed-off-by: Simon Goldschmidt <simon.k.r.goldschm...@gmail.com>
---
v2:
- Don't remove gd->malloc_base assignment at the end of board_init_f()
(moved to an extra patch)
arch/arm/mach-socfpga/spl_gen5.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/mach-socfpga/spl_gen5.c b/arch/arm/mach-socfpga/spl_gen5.c
index d6fe7d35af..9bdfaa3c1e 100644
--- a/arch/arm/mach-socfpga/spl_gen5.c
+++ b/arch/arm/mach-socfpga/spl_gen5.c
@@ -86,6 +86,7 @@ void board_init_f(ulong dummy)
const struct cm_config *cm_default_cfg = cm_get_default_config();
unsigned long sdram_size;
unsigned long reg;
+ int ret;
/*
* First C code to run. Clear fake OCRAM ECC first as SBE
@@ -152,6 +153,12 @@ void board_init_f(ulong dummy)
/* unfreeze / thaw all IO banks */
sys_mgr_frzctrl_thaw_req();
+ ret = spl_early_init();
Uh, but isn't this called from common/spl/spl.c ? I suspect the SoCFPGA
SPL is a bit weird.
Ehrm, I copied this from spl_s10.c, but other boards seem to do this,
too. Honestly, I don't know how any SPL can use DM serial without this
being called. Maybe other SPLs initialize the serial port later (not in
board_init_f).
common/spl/spl.c calls spl_init(), which also calls the part that
spl_early_init() calls.
I can only take other SPLs as reference and from reading all the code, I
think this should be good.
Simon
+ if (ret) {
+ debug("spl_early_init() failed: %d\n", ret);
+ hang();
+ }
+
/* enable console uart printing */
preloader_console_init();
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