[src/trunk]: src/sys/arch Remove the __HAVE_CPU_UAREA_ROUTINES code from x86.

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3f174601a141
branches:  trunk
changeset: 831210:3f174601a141
user:      maxv <maxv%NetBSD.org@localhost>
date:      Fri Mar 16 12:19:35 2018 +0000

description:
Remove the __HAVE_CPU_UAREA_ROUTINES code from x86.

It was available only in amd64, and I disabled it a few months ago in
order to support SVS. Regardless of SVS this option was questionable,
since it made stack overflows more difficult to detect.

diffstat:

 sys/arch/amd64/include/types.h |   3 +-
 sys/arch/x86/x86/vm_machdep.c  |  59 +----------------------------------------
 2 files changed, 3 insertions(+), 59 deletions(-)

diffs (94 lines):

diff -r fee6671e3e39 -r 3f174601a141 sys/arch/amd64/include/types.h
--- a/sys/arch/amd64/include/types.h    Fri Mar 16 12:10:16 2018 +0000
+++ b/sys/arch/amd64/include/types.h    Fri Mar 16 12:19:35 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: types.h,v 1.54 2018/01/11 09:00:04 maxv Exp $  */
+/*     $NetBSD: types.h,v 1.55 2018/03/16 12:19:35 maxv Exp $  */
 
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
@@ -106,7 +106,6 @@
 #define        __HAVE_DIRECT_MAP 1
 #define        __HAVE_MM_MD_DIRECT_MAPPED_IO
 #define        __HAVE_MM_MD_DIRECT_MAPPED_PHYS
-/* #define     __HAVE_CPU_UAREA_ROUTINES */
 #if !defined(NO_PCI_MSI_MSIX)
 #define        __HAVE_PCI_MSI_MSIX
 #endif
diff -r fee6671e3e39 -r 3f174601a141 sys/arch/x86/x86/vm_machdep.c
--- a/sys/arch/x86/x86/vm_machdep.c     Fri Mar 16 12:10:16 2018 +0000
+++ b/sys/arch/x86/x86/vm_machdep.c     Fri Mar 16 12:19:35 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vm_machdep.c,v 1.32 2018/01/18 07:25:34 maxv Exp $     */
+/*     $NetBSD: vm_machdep.c,v 1.33 2018/03/16 12:19:35 maxv Exp $     */
 
 /*-
  * Copyright (c) 1982, 1986 The Regents of the University of California.
@@ -80,7 +80,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.32 2018/01/18 07:25:34 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.33 2018/03/16 12:19:35 maxv Exp $");
 
 #include "opt_mtrr.h"
 
@@ -367,58 +367,3 @@
        bp->b_data = bp->b_saveaddr;
        bp->b_saveaddr = 0;
 }
-
-#ifdef __HAVE_CPU_UAREA_ROUTINES
-void *
-cpu_uarea_alloc(bool system)
-{
-       struct pglist pglist;
-       int error;
-
-       /*
-        * Allocate a new physically contiguous uarea which can be
-        * direct-mapped.
-        */
-       error = uvm_pglistalloc(USPACE, 0, ptoa(physmem), 0, 0, &pglist, 1, 1);
-       if (error) {
-               return NULL;
-       }
-
-       /*
-        * Get the physical address from the first page.
-        */
-       const struct vm_page * const pg = TAILQ_FIRST(&pglist);
-       KASSERT(pg != NULL);
-       const paddr_t pa = VM_PAGE_TO_PHYS(pg);
-
-       /*
-        * We need to return a direct-mapped VA for the pa.
-        */
-
-       return (void *)PMAP_MAP_POOLPAGE(pa);
-}
-
-/*
- * Return true if we freed it, false if we didn't.
- */
-bool
-cpu_uarea_free(void *vva)
-{
-       vaddr_t va = (vaddr_t) vva;
-
-       if (va < PMAP_DIRECT_BASE || va >= PMAP_DIRECT_END) {
-               return false;
-       }
-
-       /*
-        * Since the pages are physically contiguous, the vm_page structures
-        * will be as well.
-        */
-       struct vm_page *pg = PHYS_TO_VM_PAGE(PMAP_UNMAP_POOLPAGE(va));
-       KASSERT(pg != NULL);
-       for (size_t i = 0; i < UPAGES; i++, pg++) {
-               uvm_pagefree(pg);
-       }
-       return true;
-}
-#endif /* __HAVE_CPU_UAREA_ROUTINES */