Date: Sun, 2 Nov 2014 21:34:25 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r273989 - head/sys/i386/isa Message-ID: <201411022134.sA2LYPxd049587@svn.freebsd.org>
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Author: jhb Date: Sun Nov 2 21:34:24 2014 New Revision: 273989 URL: https://svnweb.freebsd.org/changeset/base/273989 Log: MFamd64: Explicitly initialize the mxcsr during npxinit(). Modified: head/sys/i386/isa/npx.c Modified: head/sys/i386/isa/npx.c ============================================================================== --- head/sys/i386/isa/npx.c Sun Nov 2 20:57:19 2014 (r273988) +++ head/sys/i386/isa/npx.c Sun Nov 2 21:34:24 2014 (r273989) @@ -55,6 +55,7 @@ __FBSDID("$FreeBSD$"); #include <sys/syslog.h> #endif #include <sys/signalvar.h> +#include <vm/uma.h> #include <machine/asmacros.h> #include <machine/cputypes.h> @@ -99,6 +100,7 @@ __FBSDID("$FreeBSD$"); #ifdef CPU_ENABLE_SSE #define fxrstor(addr) __asm __volatile("fxrstor %0" : : "m" (*(addr))) #define fxsave(addr) __asm __volatile("fxsave %0" : "=m" (*(addr))) +#define ldmxcsr(csr) __asm __volatile("ldmxcsr %0" : : "m" (csr)) #define stmxcsr(addr) __asm __volatile("stmxcsr %0" : : "m" (*(addr))) #endif #else /* !(__GNUCLIKE_ASM && !lint) */ @@ -114,6 +116,7 @@ void frstor(caddr_t addr); #ifdef CPU_ENABLE_SSE void fxsave(caddr_t addr); void fxrstor(caddr_t addr); +void ldmxcsr(u_int csr); void stmxcsr(u_int *csr); #endif @@ -364,6 +367,12 @@ npxinit(void) #endif control = __INITIAL_NPXCW__; fldcw(control); +#ifdef CPU_ENABLE_SSE + if (cpu_fxsr) { + mxcsr = __INITIAL_MXCSR__; + ldmxcsr(mxcsr); + } +#endif start_emulating(); intr_restore(saveintr); }
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