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| author | Rabara Niravkumar L <niravkumar.l.rabara@intel.com> | 2022-03-05 04:41:18 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-03-16 11:56:39 +0300 |
| commit | e1bca853dddcb57cbf084acbf35e3654cef6fc75 (patch) | |
| tree | f72231843fdc138fb9c6cb261e5775bb0482ee05 /arch/mips/bcm47xx/serial.c | |
| parent | b0596da1a019c092ca5ab64d6999f5e28d52865e (diff) | |
| download | linux-e1bca853dddcb57cbf084acbf35e3654cef6fc75.tar.xz | |
EDAC/altera: Add SDRAM ECC check for U-Boot
A bug in legacy U-Boot causes a crash during SDRAM boot if ECC is not
enabled in the bitstream but enabled in the Linux config.
Memory mapped read of the ECC Enabled bit was only enabled if U-Boot
determined ECC was enabled in the bitstream.
The Linux driver checks the ECC enable bit using a memory map read.
In the ECC disabled bitstream case, U-Boot didn't enable ECC register
memory map reads and since they are not allowed this results in a crash.
Always read the ECC Enable register through a SMC call which is always
allowed and it works with legacy and current U-Boot.
[ bp: Massage commit message. ]
Signed-off-by: Rabara Niravkumar L <niravkumar.l.rabara@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Dinh Nguyen <dinguyen@kernel.org>
Link: https://lore.kernel.org/r/20220305014118.4794-1-niravkumar.l.rabara@intel.com
Diffstat (limited to 'arch/mips/bcm47xx/serial.c')
0 files changed, 0 insertions, 0 deletions