D30797.diff
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	diff --git a/stand/powerpc/ofw/cas.c b/stand/powerpc/ofw/cas.c
	--- a/stand/powerpc/ofw/cas.c
	+++ b/stand/powerpc/ofw/cas.c
	@@ -232,10 +232,10 @@
	}
	}

	- if (radix_mmu && (var = getenv("radix_mmu")) != NULL && var[0] != '0')
	- ov5[OV5_MMU_INDEX] = OV5_MMU_RADIX;
	- else
	+ if ((var = getenv("radix_mmu")) != NULL && var[0] == '0')
	radix_mmu = 0;
	+ if (radix_mmu)
	+ ov5[OV5_MMU_INDEX] = OV5_MMU_RADIX;

	inst = OF_open("/");
	if (inst == -1) {
	diff --git a/sys/powerpc/aim/aim_machdep.c b/sys/powerpc/aim/aim_machdep.c
	--- a/sys/powerpc/aim/aim_machdep.c
	+++ b/sys/powerpc/aim/aim_machdep.c
	@@ -586,8 +586,10 @@
	{
	if ((cpu_features2 & PPC_FEATURE2_ARCH_3_00) == 0)
	radix_mmu = 0;
	- else
	+ else {
	+ radix_mmu = 1;
	TUNABLE_INT_FETCH("radix_mmu", &radix_mmu);
	+ }

	/*
	* When using Radix, set the start and end of kva early, to be able to
	diff --git a/sys/powerpc/powerpc/pmap_dispatch.c b/sys/powerpc/powerpc/pmap_dispatch.c
	--- a/sys/powerpc/powerpc/pmap_dispatch.c
	+++ b/sys/powerpc/powerpc/pmap_dispatch.c
	@@ -83,7 +83,7 @@

	SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters");

	-int superpages_enabled = 0;
	+int superpages_enabled = 1;
	SYSCTL_INT(_vm_pmap, OID_AUTO, superpages_enabled, CTLFLAG_RDTUN,
	&superpages_enabled, 0, "Enable support for transparent superpages");