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authorJustin Hibbits <jhibbits@FreeBSD.org>2018-04-20 03:19:44 +0000
committerJustin Hibbits <jhibbits@FreeBSD.org>2018-04-20 03:19:44 +0000
commit2914706ab09b565d52ec4ae4fcca8025fdcd214b (patch)
treee7d7b94286e3e23e0e3d480e95f53e0a5ee370a0 /usr.bin
parent5ea3fdc7759782f8ea07545796ca11bfb0b0348a (diff)
downloadsrc-2914706ab09b565d52ec4ae4fcca8025fdcd214b.tar.gz
src-2914706ab09b565d52ec4ae4fcca8025fdcd214b.zip
powerpc64: Add DSCR support
Summary: Powerpc64 has support for a register called Data Stream Control Register (DSCR), which basically controls how the hardware controls the caching and prefetch for stream operations. Since mfdscr and mtdscr are privileged instructions, we need to emulate them, and keep the custom DSCR configuration per thread. The purpose of this feature is to change DSCR depending on the operation, set to DSCR Default Prefetch Depth to deepest on string operations, as memcpy. Submitted by: Breno Leitao Differential Revision: https://reviews.freebsd.org/D15081
Notes
Notes: svn path=/head/; revision=332807
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