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kern: reflect nintendo cache management behavior for initial processes

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This commit is contained in:
Michael Scire 2021-10-25 13:02:35 -07:00
parent 54dde406bc
commit 6ad3219656
1 changed files with 5 additions and 3 deletions
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8
libraries/libmesosphere/source/kern_k_initial_process_reader.cpp
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@ -180,9 +180,11 @@ namespace ams::kern {
}
/* Flush caches. */
/* NOTE: official kernel does an entire cache flush by set/way here, which is incorrect as other cores are online. */
/* We will simply flush by virtual address, since that's what ARM says is correct to do. */
MESOSPHERE_R_ABORT_UNLESS(cpu::FlushDataCache(GetVoidPointer(address), params.code_num_pages * PageSize));
/* NOTE: This seems incorrect according to arm spec, which says not to flush via set/way after boot. */
/* However, Nintendo flushes the entire cache here and not doing so has caused reports of abort with ESR_EL1 */
/* as 0x02000000 (unknown abort) to occur. */
MESOSPHERE_UNUSED(params);
cpu::FlushEntireDataCache();
cpu::InvalidateEntireInstructionCache();
return ResultSuccess();