Date: Sun, 22 Mar 2009 18:56:27 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r190272 - in head/sys: amd64/include i386/include Message-ID: <200903221856.n2MIuRhW076966@svn.freebsd.org>
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Author: alc Date: Sun Mar 22 18:56:26 2009 New Revision: 190272 URL: http://svn.freebsd.org/changeset/base/190272 Log: Update stale comments. The alternate address space mapping was eliminated when PAE support was added to i386. The direct mapping exists on amd64. Modified: head/sys/amd64/include/pmap.h head/sys/i386/include/pmap.h Modified: head/sys/amd64/include/pmap.h ============================================================================== --- head/sys/amd64/include/pmap.h Sun Mar 22 17:22:14 2009 (r190271) +++ head/sys/amd64/include/pmap.h Sun Mar 22 18:56:26 2009 (r190272) @@ -160,13 +160,7 @@ typedef u_int64_t pml4_entry_t; #define PDESHIFT (3) /* - * Address of current and alternate address space page table maps - * and directories. - * XXX it might be saner to just direct map all of physical memory - * into the kernel using 2MB pages. We have enough space to do - * it (2^47 bits of KVM, while current max physical addressability - * is 2^40 physical bits). Then we can get rid of the evil hole - * in the page tables and the evil overlapping. + * Address of current address space page table maps and directories. */ #ifdef _KERNEL #define addr_PTmap (KVADDR(PML4PML4I, 0, 0, 0)) Modified: head/sys/i386/include/pmap.h ============================================================================== --- head/sys/i386/include/pmap.h Sun Mar 22 17:22:14 2009 (r190271) +++ head/sys/i386/include/pmap.h Sun Mar 22 18:56:26 2009 (r190272) @@ -174,8 +174,7 @@ typedef uint32_t pt_entry_t; #endif /* - * Address of current and alternate address space page table maps - * and directories. + * Address of current address space page table maps and directories. */ #ifdef _KERNEL extern pt_entry_t PTmap[];
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