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ARM: mvebu: handle unused DRAM banks with ECC enabled

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dram_ecc_scrubbing() had code to skip unused DRAM banks but it would not
work because mvebu_sdram_bs() returns 0 and the code was subtracting 1
before checking the size. Remove the -1 from the bank size and the +1
from the total which will skip unused banks and still calculate the
correct size. Put the -1 where it is needed for scrubbing via the xor
engine.

Reported-by: Joshua Scott <joshua.scott@alliedtelesis.co.nz>
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Chris Packham 2017-09-23 04:50:31 +12:00 • committed by Stefan Roese
parent 0a91e1cce4
commit c3ab274444
1 changed files with 3 additions and 3 deletions
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6
arch/arm/mach-mvebu/dram.c
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@ -179,11 +179,11 @@ static void dram_ecc_scrubbing(void)
reg_write(REG_SDRAM_CONFIG_ADDR, temp);
for (cs = 0; cs < CONFIG_NR_DRAM_BANKS; cs++) {
size = mvebu_sdram_bs(cs) - 1;
size = mvebu_sdram_bs(cs);
if (size == 0)
continue;
total = (u64)size + 1;
total = (u64)size;
total_mem += (u32)(total / (1 << 30));
start_addr = 0;
mv_xor_init2(cs);
@ -194,7 +194,7 @@ static void dram_ecc_scrubbing(void)
size -= start_addr;
}
mv_xor_mem_init(SCRB_XOR_CHAN, start_addr, size,
mv_xor_mem_init(SCRB_XOR_CHAN, start_addr, size - 1,
SCRUB_MAGIC, SCRUB_MAGIC);
/* Wait for previous transfer completion */