Date: Sat, 2 Sep 2006 11:56:45 +0530 From: "Bharath Bhushan" <bharath.bhushan@gmail.com> To: freebsd-ia32@freebsd.org Subject: io apic question Message-ID: <29683db20609012326i351eb455ja3b0aade681c7773@mail.gmail.com>
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I am looking at 4.9 sources. When the local apic is mapped into SMPpt in sys/i386/i386/pmap.c:pmap_bootstrap(), it is mapped cache-disabled (PG_N). When the IO apics are being mapped into SMPpt in sys/i386/i386/mp_machdep.c:mptable_pass2(), it is *not* mapped cache-disabled. Why is this difference? In 5.5, I see that ioapic_create() calls pmap_createdev(), which allocates cache-enabled kind of mapping. Am I missing something here? -- Thanks Bharath
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