PERFORCE change 30840 for review

[Marcel Moolenaar]

http://perforce.freebsd.org/chv.cgi?CH=30840

Change 30840 by marcel at marcel_nfs on 2003/05/08 23:56:50

	Only set the ia32 flags (eflags and cflg) when executing an
	ia32 application.
	Also, enable the high FP registers by default. The ia32
	engine needs them.

Affected files ...

.. //depot/projects/ia64_epc/sys/ia64/ia32/ia32_sysvec.c#4 edit
.. //depot/projects/ia64_epc/sys/ia64/ia64/machdep.c#23 edit
.. //depot/projects/ia64_epc/sys/ia64/ia64/mp_machdep.c#10 edit

Differences ...

==== //depot/projects/ia64_epc/sys/ia64/ia32/ia32_sysvec.c#4 (text+ko) ====

@@ -248,8 +248,12 @@
 
 	exec_setregs(td, entry, stack, ps_strings);
 
-	/* Mark this process as using the ia32 instruction set. */
+	/*
+	 * Mark this process as using the ia32 instruction set and
+	 * enable the high FP registers by default.
+	 */
 	frame->tf_special.psr |= IA64_PSR_IS;
+	frame->tf_special.psr &= ~IA64_PSR_DFH;
 
 	codesel = LSEL(LUCODE_SEL, SEL_UPL);
 	datasel = LSEL(LUDATA_SEL, SEL_UPL);
@@ -333,9 +337,9 @@
 	frame->tf_scratch.gr30 = ldtseg; /* LDTD */
 	frame->tf_scratch.gr31 = gdtseg; /* GDTD */
 
-#if 0
+	/* Set ia32 control registers on this processor. */
+	ia64_set_cflg(CR0_PE | CR0_PG | ((long)(CR4_XMM | CR4_FXSR) << 32));
 	ia64_set_eflag(PSL_USER);
-#endif
 
 	/* PS_STRINGS value for BSD/OS binaries.  It is 0 for non-BSD/OS. */
 	frame->tf_scratch.gr11 = IA32_PS_STRINGS;

==== //depot/projects/ia64_epc/sys/ia64/ia64/machdep.c#23 (text+ko) ====

@@ -729,12 +729,6 @@
 	PCPU_SET(curthread, &thread0);
 
 	/*
-	 * Set ia32 control registers.
-	 */
-	ia64_set_cflg((CR0_PE | CR0_PG)
-		      | ((long)(CR4_XMM | CR4_FXSR) << 32));
-
-	/*
 	 * Initialize the rest of proc 0's PCB.
 	 *
 	 * Set the kernel sp, reserving space for an (empty) trapframe,

==== //depot/projects/ia64_epc/sys/ia64/ia64/mp_machdep.c#10 (text+ko) ====

@@ -97,9 +97,6 @@
 
 	ia64_set_fpsr(IA64_FPSR_DEFAULT);
 
-	/* Set ia32 control registers. */
-	ia64_set_cflg(CR0_PE | CR0_PG | ((long)(CR4_XMM|CR4_FXSR) << 32));
-
 	/* Wait until it's time for us to be unleashed */
 	while (ap_spin)
 		/* spin */;