c70af4875e
words, every architecture is now auto-sizing the kmem arena. This revision
changes kmeminit() so that the definition of VM_KMEM_SIZE_SCALE becomes
mandatory and the definition of VM_KMEM_SIZE becomes optional.
Replace or eliminate all existing definitions of VM_KMEM_SIZE. With
auto-sizing enabled, VM_KMEM_SIZE effectively became an alternate spelling
for VM_KMEM_SIZE_MIN on most architectures. Use VM_KMEM_SIZE_MIN for
clarity.
Change kmeminit() so that the effect of defining VM_KMEM_SIZE is similar to
that of setting the tunable vm.kmem_size. Whereas the macros
VM_KMEM_SIZE_{MAX,MIN,SCALE} have had the same effect as the tunables
vm.kmem_size_{max,min,scale}, the effects of VM_KMEM_SIZE and vm.kmem_size
have been distinct. In particular, whereas VM_KMEM_SIZE was overridden by
VM_KMEM_SIZE_{MAX,MIN,SCALE} and vm.kmem_size_{max,min,scale}, vm.kmem_size
was not. Remedy this inconsistency. Now, VM_KMEM_SIZE can be used to set
the size of the kmem arena at compile-time without that value being
overridden by auto-sizing.
Update the nearby comments to reflect the kmem submap being replaced by the
kmem arena. Stop duplicating the auto-sizing formula in every machine-
dependent vmparam.h and place it in kmeminit() where auto-sizing takes
place.
Reviewed by: kib (an earlier version)
Sponsored by: EMC / Isilon Storage Division
207 lines
7.0 KiB
C
207 lines
7.0 KiB
C
/*-
|
|
* Copyright (c) 1988 University of Utah.
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* the Systems Programming Group of the University of Utah Computer
|
|
* Science Department and Ralph Campbell.
|
|
*
|
|
* 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
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* 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.
|
|
*
|
|
* from: Utah $Hdr: vmparam.h 1.16 91/01/18$
|
|
*
|
|
* @(#)vmparam.h 8.2 (Berkeley) 4/22/94
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_VMPARAM_H_
|
|
#define _MACHINE_VMPARAM_H_
|
|
|
|
/*
|
|
* Virtual memory related constants, all in bytes
|
|
*/
|
|
#ifndef MAXTSIZ
|
|
#define MAXTSIZ (1<<30) /* max text size (1G) */
|
|
#endif
|
|
#ifndef DFLDSIZ
|
|
#define DFLDSIZ (1<<27) /* initial data size (128M) */
|
|
#endif
|
|
#ifndef MAXDSIZ
|
|
#define MAXDSIZ (1<<30) /* max data size (1G) */
|
|
#endif
|
|
#ifndef DFLSSIZ
|
|
#define DFLSSIZ (1<<21) /* initial stack size (2M) */
|
|
#endif
|
|
#ifndef MAXSSIZ
|
|
#define MAXSSIZ (1<<28) /* max stack size (256M) */
|
|
#endif
|
|
#ifndef SGROWSIZ
|
|
#define SGROWSIZ (128UL*1024) /* amount to grow stack */
|
|
#endif
|
|
|
|
/*
|
|
* We need region 7 virtual addresses for pagetables.
|
|
*/
|
|
#define UMA_MD_SMALL_ALLOC
|
|
|
|
/*
|
|
* The physical address space is sparsely populated.
|
|
*/
|
|
#define VM_PHYSSEG_SPARSE
|
|
|
|
/*
|
|
* The number of PHYSSEG entries is equal to the number of phys_avail
|
|
* entries.
|
|
*/
|
|
#define VM_PHYSSEG_MAX 49
|
|
|
|
/*
|
|
* Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
|
|
* from which physical pages are allocated and VM_FREEPOOL_DIRECT is
|
|
* the pool from which physical pages for small UMA objects are
|
|
* allocated.
|
|
*/
|
|
#define VM_NFREEPOOL 3
|
|
#define VM_FREEPOOL_CACHE 2
|
|
#define VM_FREEPOOL_DEFAULT 0
|
|
#define VM_FREEPOOL_DIRECT 1
|
|
|
|
/*
|
|
* Create one free page list.
|
|
*/
|
|
#define VM_NFREELIST 1
|
|
#define VM_FREELIST_DEFAULT 0
|
|
|
|
/*
|
|
* An allocation size of 256MB is supported in order to optimize the
|
|
* use of the identity mappings in region 7 by UMA.
|
|
*/
|
|
#define VM_NFREEORDER 16
|
|
|
|
/*
|
|
* Disable superpage reservations.
|
|
*/
|
|
#ifndef VM_NRESERVLEVEL
|
|
#define VM_NRESERVLEVEL 0
|
|
#endif
|
|
|
|
#define IA64_VM_MINKERN_REGION 4
|
|
|
|
/*
|
|
* Manipulating region bits of an address.
|
|
*/
|
|
#define IA64_RR_BASE(n) (((uint64_t) (n)) << 61)
|
|
#define IA64_RR_MASK(x) ((x) & ((1L << 61) - 1))
|
|
|
|
#define IA64_PHYS_TO_RR6(x) ((x) | IA64_RR_BASE(6))
|
|
#define IA64_PHYS_TO_RR7(x) ((x) | IA64_RR_BASE(7))
|
|
|
|
/*
|
|
* The Itanium architecture defines that all implementations support at
|
|
* least 51 virtual address bits (i.e. IMPL_VA_MSB=50). The unimplemented
|
|
* bits are sign-extended from VA{IMPL_VA_MSB}. As such, there's a gap in
|
|
* the virtual address range, which extends at most from 0x0004000000000000
|
|
* to 0x1ffbffffffffffff. We define the top half of a region in terms of
|
|
* this worst-case gap.
|
|
*/
|
|
#define IA64_REGION_GAP_START 0x0004000000000000
|
|
#define IA64_REGION_GAP_EXTEND 0x1ffc000000000000
|
|
|
|
/*
|
|
* Parameters for Pre-Boot Virtual Memory (PBVM).
|
|
* The kernel, its modules and metadata are loaded in the PBVM by the loader.
|
|
* The PBVM consists of pages for which the mapping is maintained in a page
|
|
* table. The page table is at least 1 EFI page large (i.e. 4KB), but can be
|
|
* larger to accommodate more PBVM. The maximum page table size is 1MB. With
|
|
* 8 bytes per page table entry, this means that the PBVM has at least 512
|
|
* pages and at most 128K pages.
|
|
* The GNU toolchain (in particular GNU ld) does not support an alignment
|
|
* larger than 64K. This means that we cannot guarantee page alignment for
|
|
* a page size that's larger than 64K. We do want to have text and data in
|
|
* different pages, which means that the maximum usable page size is 64KB.
|
|
* Consequently:
|
|
* The maximum total PBVM size is 8GB -- enough for a DVD image. A page table
|
|
* of a single EFI page (4KB) allows for 32MB of PBVM.
|
|
*
|
|
* The kernel is given the PA and size of the page table that provides the
|
|
* mapping of the PBVM. The page table itself is assumed to be mapped at a
|
|
* known virtual address and using a single translation wired into the CPU.
|
|
* As such, the page table is assumed to be a power of 2 and naturally aligned.
|
|
* The kernel also assumes that a good portion of the kernel text is mapped
|
|
* and wired into the CPU, but does not assume that the mapping covers the
|
|
* whole of PBVM.
|
|
*/
|
|
#define IA64_PBVM_RR IA64_VM_MINKERN_REGION
|
|
#define IA64_PBVM_BASE \
|
|
(IA64_RR_BASE(IA64_PBVM_RR) + IA64_REGION_GAP_EXTEND)
|
|
|
|
#define IA64_PBVM_PGTBL_MAXSZ 1048576
|
|
#define IA64_PBVM_PGTBL \
|
|
(IA64_RR_BASE(IA64_PBVM_RR + 1) - IA64_PBVM_PGTBL_MAXSZ)
|
|
|
|
#define IA64_PBVM_PAGE_SHIFT 16 /* 64KB */
|
|
#define IA64_PBVM_PAGE_SIZE (1 << IA64_PBVM_PAGE_SHIFT)
|
|
#define IA64_PBVM_PAGE_MASK (IA64_PBVM_PAGE_SIZE - 1)
|
|
|
|
/*
|
|
* Mach derived constants
|
|
*/
|
|
|
|
/* user/kernel map constants */
|
|
#define VM_MIN_ADDRESS 0
|
|
#define VM_MAXUSER_ADDRESS IA64_RR_BASE(IA64_VM_MINKERN_REGION)
|
|
#define VM_MIN_KERNEL_ADDRESS VM_MAXUSER_ADDRESS
|
|
#define VM_INIT_KERNEL_ADDRESS IA64_RR_BASE(IA64_VM_MINKERN_REGION + 1)
|
|
#define VM_MAX_KERNEL_ADDRESS (IA64_RR_BASE(IA64_VM_MINKERN_REGION + 2) - 1)
|
|
#define VM_MAX_ADDRESS ~0UL
|
|
|
|
/* We link the kernel at IA64_PBVM_BASE. */
|
|
#define KERNBASE IA64_PBVM_BASE
|
|
|
|
/*
|
|
* USRSTACK is the top (end) of the user stack. Immediately above the user
|
|
* stack resides the syscall gateway page.
|
|
*/
|
|
#define USRSTACK VM_MAXUSER_ADDRESS
|
|
#define IA64_BACKINGSTORE (USRSTACK - (2 * MAXSSIZ) - PAGE_SIZE)
|
|
|
|
/*
|
|
* How many physical pages per kmem arena virtual page.
|
|
*/
|
|
#ifndef VM_KMEM_SIZE_SCALE
|
|
#define VM_KMEM_SIZE_SCALE (4)
|
|
#endif
|
|
|
|
/* initial pagein size of beginning of executable file */
|
|
#ifndef VM_INITIAL_PAGEIN
|
|
#define VM_INITIAL_PAGEIN 16
|
|
#endif
|
|
|
|
#define ZERO_REGION_SIZE (2 * 1024 * 1024) /* 2MB */
|
|
|
|
#endif /* !_MACHINE_VMPARAM_H_ */
|