diff options
| author | jhb <jhb@FreeBSD.org> | 2014-11-02 21:34:24 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2014-11-02 21:34:24 +0000 |
| commit | 664d599f04040f719929d3a38d2a787553abb88f (patch) | |
| tree | 1ffecbe1e3c44be0ec83cf58a0cbb4b3fdbc7ed4 /sys/i386/isa/npx.c | |
| parent | 1c8237d7eb2052b6f9683464506befd12807ed3f (diff) | |
| download | FreeBSD-src-664d599f04040f719929d3a38d2a787553abb88f.zip FreeBSD-src-664d599f04040f719929d3a38d2a787553abb88f.tar.gz | |
MFamd64: Explicitly initialize the mxcsr during npxinit().
Diffstat (limited to 'sys/i386/isa/npx.c')
| -rw-r--r-- | sys/i386/isa/npx.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/i386/isa/npx.c b/sys/i386/isa/npx.c index dd8403a..dbbfba2 100644 --- a/sys/i386/isa/npx.c +++ b/sys/i386/isa/npx.c @@ -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); } |
