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Differential D47485

arm: switch the BUSDMA buffers to normal uncached memory
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Authored by mmel on Nov 8 2024, 12:17 PM.
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Reviewers
andrew
Group Reviewers
ARM
Commits
rG52c00b65a76e: arm: switch the BUSDMA buffers to normal uncached memory
rG60799897ea89: arm: switch the BUSDMA buffers to normal uncached memory
rG248109448f6a: arm: switch the BUSDMA buffers to normal uncached memory
Summary

The BUSDMA buffer is treated as normal memory during compilation and compiler
is free to inline/optimize basic functions (i.e. memset, memcpy) accessing
buffers, including when an instruction is generated that performs a word
access to unaligned data. We support this, but only if the buffer in question
is mapped as normal memory (cached or not), but not to memory mapped as
strongly ordered or device type.

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rG FreeBSD src repository
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sys/
arm/
include/
2 lines

Diff 146264

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sys/arm/include/vm.h

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