Thu Jul 30 07:31:30 2020 UTC ()

Update a comment


(skrll)

diff -r1.27 -r1.28 src/sys/arch/mips/mips/pmap_machdep.c

--- src/sys/arch/mips/mips/pmap_machdep.c 2020/03/11 13:30:31	1.27
+++ src/sys/arch/mips/mips/pmap_machdep.c 2020/07/30 07:31:30	1.28

 @@ -1,14 +1,14 @@
-/*	$NetBSD: pmap_machdep.c,v 1.27 2020/03/11 13:30:31 thorpej Exp $	*/
+/*	$NetBSD: pmap_machdep.c,v 1.28 2020/07/30 07:31:30 skrll Exp $	*/
 /*-
  * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
  * All rights reserved.
+ *
  * This code is derived from software contributed to The NetBSD Foundation
  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
  * NASA Ames Research Center and by Chris G. Demetriou.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
 @@ -57,27 +57,27 @@
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
+ *
  *	@(#)pmap.c	8.4 (Berkeley) 1/26/94
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap_machdep.c,v 1.27 2020/03/11 13:30:31 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap_machdep.c,v 1.28 2020/07/30 07:31:30 skrll Exp $");
 /*
  *	Manages physical address maps.
+ *
  *	In addition to hardware address maps, this
  *	module is called upon to provide software-use-only
  *	maps which may or may not be stored in the same
  *	form as hardware maps.  These pseudo-maps are
  *	used to store intermediate results from copy
  *	operations to and from address spaces.
+ *
  *	Since the information managed by this module is
  *	also stored by the logical address mapping module,
 @@ -694,30 +694,30 @@ pmap_md_page_syncicache(struct vm_page *
 		    PAGE_SIZE);
+	}
 #ifdef MULTIPROCESSOR
 	pv_entry_t pv = &mdpg->mdpg_first;
 	const register_t va = (intptr_t)trunc_page(pv->pv_va);
 	pmap_tlb_syncicache(va, onproc);
 #endif
+}
 struct vm_page *
 pmap_md_alloc_poolpage(int flags)
+{
 	/*
-	 * On 32bit kernels, we must make sure that we only allocate pages that
+	 * The VM_FREELIST used for pool pages is only set on 32bit kernels.
-	 * can be mapped via KSEG0.  On 64bit kernels, try to allocated from
+	 * This is to must make sure that we only allocate pages that
-	 * the first 4G.  If all memory is in KSEG0/4G, then we can just
+	 * can be mapped via KSEG0.  On 64bit kernels, all memory can be
-	 * use the default freelist otherwise we must use the pool page list.
+	 * mapped via XKPHYS so just use the default freelist.
 	 */
 	if (mips_poolpage_vmfreelist != VM_FREELIST_DEFAULT)
 		return uvm_pagealloc_strat(NULL, 0, NULL, flags,
 		    UVM_PGA_STRAT_ONLY, mips_poolpage_vmfreelist);
 	return uvm_pagealloc(NULL, 0, NULL, flags);
+}
 vaddr_t
 pmap_md_map_poolpage(paddr_t pa, size_t len)
+{
 	struct vm_page * const pg = PHYS_TO_VM_PAGE(pa);