Hello,
I've been working on a QorIQ P1022 board (controlcenterd) to run the
newest U-Boot on it, and I encountered some strange behavior.
During boot, we get these error messages
"
ERROR: Cannot import environment: errno = 12
at common/env_common.c:221/env_import()
*** Warning - import failed, using default environment
ERROR: Environment import failed: errno = 12
at common/env_common.c:123/set_default_env()
## Can't malloc 9 bytes
"
After bisecting, I found out that the commit 4683b22 (mmc:fsl_esdhc
invalidate dcache before read) apparently causes this. With the
additional d-cache invalidations in place, malloc and free calls fail.
Now, after some experimenting, I found out that deactivating the
d-cache invalidation when reading the first sector is enough; that is,
if one replaces the first invalidation
"
if (data->flags & MMC_DATA_READ)
check_and_invalidate_dcache_range(cmd, data);
"
with
"
if (data->flags & MMC_DATA_READ && (cmd->cmdidx !=
MMC_CMD_READ_SINGLE_BLOCK || cmd->cmdarg != 0))
check_and_invalidate_dcache_range(cmd, data);
"
in fsl_esdhc.c, it seems to work, but I have no idea why that is the case.
Any ideas would be greatly appreciated.
Best regards,
Mario
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