Hello,
I am using 2.4.18 on a proprietary 8260 board. It appears that
CPU_FTR_HPTE_TABLE is not supported for the 8260(603e). Therefore,
MMU_init_hw in ppc_mmu.c returns without patching create_hpte and
flush_hash_page in hashtable.S or allocating hash memory.
However, a Data Access Exception(0x300) eventually calls create_hpte,
trashing my memory.
What am I missing here?
Jim
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Jim Mar writes:
I am using 2.4.18 on a proprietary 8260 board. It appears that
CPU_FTR_HPTE_TABLE is not supported for the 8260(603e). Therefore,
MMU_init_hw in ppc_mmu.c returns without patching create_hpte and
flush_hash_page in hashtable.S or allocating hash memory.
However, a Data Access Exception(0x300) eventually calls create_hpte,
trashing my memory.
This is fixed in the official 2.4.19 and in the current linuxppc_2_4
and linuxppc_2_4_devel trees. The code that calls hash_page (which calls
create_hpte) in the DSI handler is in a feature section, which means
it gets overwritten with NOPs if we don't have a hash table.
Paul.
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