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delete VM_DEFAULT_ADDRESS and commentary which is no longer used/true.

This commit is contained in:
christos 2014-01-25 15:17:17 +00:00
parent b07f3fe235
commit 37493adfb4
1 changed files with 2 additions and 38 deletions
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40
sys/uvm/uvm_param.h
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_param.h,v 1.32 2014/01/25 05:14:03 christos Exp $ */
/* $NetBSD: uvm_param.h,v 1.33 2014/01/25 15:17:17 christos Exp $ */
/*
* Copyright (c) 1991, 1993
@ -211,52 +211,16 @@ extern const int *const uvmexp_pageshift;
#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
#define trunc_page(x) ((x) & ~PAGE_MASK)
/*
* Set up the default mapping address (VM_DEFAULT_ADDRESS) according to:
*
* USE_TOPDOWN_VM: a kernel option to enable on a per-kernel basis
* which only be used on ports that define...
* __HAVE_TOPDOWN_VM: a per-port option to offer the topdown option
*
* __USE_TOPDOWN_VM: a per-port option to unconditionally use it
*
* if __USE_TOPDOWN_VM is defined, the port can specify a default vm
* address, or we will use the topdown default from below. If it is
* NOT defined, then the port can offer topdown as an option, but it
* MUST define the VM_DEFAULT_ADDRESS macro itself.
*/
#ifndef VM_DEFAULT_ADDRESS_BOTTOMUP
#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
round_page((vaddr_t)(da) + (vsize_t)maxdmap)
#endif
#ifndef VM_DEFAULT_ADDRESS_TOPDOWN
#define VM_DEFAULT_ADDRESS_TOPDOWN(da, sz) \
trunc_page(VM_MAXUSER_ADDRESS - MAXSSIZ - (sz))
#endif
#if defined(USE_TOPDOWN_VM) || defined(__USE_TOPDOWN_VM)
# if !defined(__HAVE_TOPDOWN_VM) && !defined(__USE_TOPDOWN_VM)
# error "Top down memory allocation not enabled for this system"
# else /* !__HAVE_TOPDOWN_VM && !__USE_TOPDOWN_VM */
# define __USING_TOPDOWN_VM
# if !defined(VM_DEFAULT_ADDRESS)
# if !defined(__USE_TOPDOWN_VM)
# error "Top down memory allocation not configured for this system"
# else /* !__USE_TOPDOWN_VM */
# define VM_DEFAULT_ADDRESS(da, sz) VM_DEFAULT_ADDRESS_TOPDOWN(da, sz)
# endif /* !__USE_TOPDOWN_VM */
# endif /* !VM_DEFAULT_ADDRESS */
# endif /* !__HAVE_TOPDOWN_VM && !__USE_TOPDOWN_VM */
#endif /* USE_TOPDOWN_VM || __USE_TOPDOWN_VM */
#if !defined(__USING_TOPDOWN_VM)
# if defined(VM_DEFAULT_ADDRESS)
# error "Default vm address should not be defined here"
# else /* VM_DEFAULT_ADDRESS */
# define VM_DEFAULT_ADDRESS(da, sz) VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz)
# endif /* VM_DEFAULT_ADDRESS */
#endif /* !__USING_TOPDOWN_VM */
extern int ubc_nwins; /* number of UBC mapping windows */
extern int ubc_winshift; /* shift for a UBC mapping window */
extern u_int uvm_emap_size; /* size of emap */