Date: Tue, 23 Aug 2016 21:40:32 +0000 (UTC) From: Nathan Whitehorn <nwhitehorn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r304706 - projects/powernv/powerpc/aim Message-ID: <201608232140.u7NLeWYs077420@repo.freebsd.org>
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Author: nwhitehorn Date: Tue Aug 23 21:40:32 2016 New Revision: 304706 URL: https://svnweb.freebsd.org/changeset/base/304706 Log: Use the correct value of the IS selector in tlbiel when flushing the TLB. The way-based mechanism (IS=11) on newer CPUs can in principle cause problems on older ones, so use a CPU-dependent selection. Modified: projects/powernv/powerpc/aim/moea64_native.c Modified: projects/powernv/powerpc/aim/moea64_native.c ============================================================================== --- projects/powernv/powerpc/aim/moea64_native.c Tue Aug 23 21:34:36 2016 (r304705) +++ projects/powernv/powerpc/aim/moea64_native.c Tue Aug 23 21:40:32 2016 (r304706) @@ -465,9 +465,23 @@ tlbia(void) register_t msr, scratch; #endif + i = 0xc00; /* IS = 11 */ + switch (mfpvr() >> 16) { + case IBM970: + case IBM970FX: + case IBM970MP: + case IBM970GX: + case IBMPOWER4: + case IBMPOWER4PLUS: + case IBMPOWER5: + case IBMPOWER5PLUS: + i = 0; /* IS not supported */ + break; + } + TLBSYNC(); - for (i = 0x800 /* IS=10 */; i < 0xFF000; i += 0x00001000) { + for (; i < 0x200000; i += 0x00001000) { #ifdef __powerpc64__ __asm __volatile("tlbiel %0" :: "r"(i)); #else
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