vmparam.h revision 219741
1139790Simp/*- 266458Sdfr * Copyright (c) 1988 University of Utah. 366458Sdfr * Copyright (c) 1992, 1993 466458Sdfr * The Regents of the University of California. All rights reserved. 566458Sdfr * 666458Sdfr * This code is derived from software contributed to Berkeley by 766458Sdfr * the Systems Programming Group of the University of Utah Computer 866458Sdfr * Science Department and Ralph Campbell. 966458Sdfr * 1066458Sdfr * Redistribution and use in source and binary forms, with or without 1166458Sdfr * modification, are permitted provided that the following conditions 1266458Sdfr * are met: 1366458Sdfr * 1. Redistributions of source code must retain the above copyright 1466458Sdfr * notice, this list of conditions and the following disclaimer. 1566458Sdfr * 2. Redistributions in binary form must reproduce the above copyright 1666458Sdfr * notice, this list of conditions and the following disclaimer in the 1766458Sdfr * documentation and/or other materials provided with the distribution. 1866458Sdfr * 4. Neither the name of the University nor the names of its contributors 1966458Sdfr * may be used to endorse or promote products derived from this software 2066458Sdfr * without specific prior written permission. 2166458Sdfr * 2266458Sdfr * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2366458Sdfr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2466458Sdfr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2566458Sdfr * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2666458Sdfr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2766458Sdfr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2866458Sdfr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2966458Sdfr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3066458Sdfr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3166458Sdfr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3266458Sdfr * SUCH DAMAGE. 3366458Sdfr * 3466458Sdfr * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 3566458Sdfr * 3666458Sdfr * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 37178296Smarcel * 38178296Smarcel * $FreeBSD: head/sys/ia64/include/vmparam.h 219741 2011-03-18 15:36:28Z marcel $ 3966458Sdfr */ 4066458Sdfr 41178296Smarcel#ifndef _MACHINE_VMPARAM_H_ 42178296Smarcel#define _MACHINE_VMPARAM_H_ 43178296Smarcel 4466458Sdfr/* 45170033Salc * USRSTACK is the top (end) of the user stack. Immediately above the user 46170033Salc * stack resides the syscall gateway page. 4766458Sdfr */ 48219741Smarcel#define USRSTACK VM_MAXUSER_ADDRESS 4966458Sdfr 5066458Sdfr/* 5166458Sdfr * Virtual memory related constants, all in bytes 5266458Sdfr */ 5366458Sdfr#ifndef MAXTSIZ 5466458Sdfr#define MAXTSIZ (1<<30) /* max text size (1G) */ 5566458Sdfr#endif 5666458Sdfr#ifndef DFLDSIZ 5766458Sdfr#define DFLDSIZ (1<<27) /* initial data size (128M) */ 5866458Sdfr#endif 5966458Sdfr#ifndef MAXDSIZ 6066458Sdfr#define MAXDSIZ (1<<30) /* max data size (1G) */ 6166458Sdfr#endif 6266458Sdfr#ifndef DFLSSIZ 6366458Sdfr#define DFLSSIZ (1<<21) /* initial stack size (2M) */ 6466458Sdfr#endif 6566458Sdfr#ifndef MAXSSIZ 6692670Speter#define MAXSSIZ (1<<28) /* max stack size (256M) */ 6766458Sdfr#endif 6866458Sdfr#ifndef SGROWSIZ 6966458Sdfr#define SGROWSIZ (128UL*1024) /* amount to grow stack */ 7066458Sdfr#endif 7166458Sdfr 7266458Sdfr/* 73106486Smarcel * We need region 7 virtual addresses for pagetables. 74106486Smarcel */ 75106486Smarcel#define UMA_MD_SMALL_ALLOC 76106486Smarcel 77106486Smarcel/* 78169291Salc * The physical address space is sparsely populated. 79169291Salc */ 80169291Salc#define VM_PHYSSEG_SPARSE 81169291Salc 82169291Salc/* 83170519Salc * The number of PHYSSEG entries is equal to the number of phys_avail 84170519Salc * entries. 85170519Salc */ 86170519Salc#define VM_PHYSSEG_MAX 49 87170519Salc 88170519Salc/* 89172317Salc * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool 90170519Salc * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 91170519Salc * the pool from which physical pages for small UMA objects are 92170519Salc * allocated. 93170519Salc */ 94172317Salc#define VM_NFREEPOOL 3 95172317Salc#define VM_FREEPOOL_CACHE 2 96170519Salc#define VM_FREEPOOL_DEFAULT 0 97170519Salc#define VM_FREEPOOL_DIRECT 1 98170519Salc 99170519Salc/* 100170519Salc * Create one free page list. 101170519Salc */ 102170519Salc#define VM_NFREELIST 1 103170519Salc#define VM_FREELIST_DEFAULT 0 104170519Salc 105170519Salc/* 106170519Salc * An allocation size of 256MB is supported in order to optimize the 107170519Salc * use of the identity mappings in region 7 by UMA. 108170519Salc */ 109170519Salc#define VM_NFREEORDER 16 110170519Salc 111170519Salc/* 112210550Sjhb * Only one memory domain. 113210550Sjhb */ 114210550Sjhb#ifndef VM_NDOMAIN 115210550Sjhb#define VM_NDOMAIN 1 116210550Sjhb#endif 117210550Sjhb 118210550Sjhb/* 119174938Salc * Disable superpage reservations. 120174938Salc */ 121174938Salc#ifndef VM_NRESERVLEVEL 122174938Salc#define VM_NRESERVLEVEL 0 123174938Salc#endif 124174938Salc 125174938Salc/* 12696912Smarcel * Manipulating region bits of an address. 12796912Smarcel */ 128208283Smarcel#define IA64_RR_BASE(n) (((uint64_t) (n)) << 61) 12996912Smarcel#define IA64_RR_MASK(x) ((x) & ((1L << 61) - 1)) 13096912Smarcel 13196912Smarcel#define IA64_PHYS_TO_RR7(x) ((x) | IA64_RR_BASE(7)) 13296912Smarcel 13396912Smarcel/* 134219691Smarcel * The Itanium architecture defines that all implementations support at 135219691Smarcel * least 51 virtual address bits (i.e. IMPL_VA_MSB=50). The unimplemented 136219691Smarcel * bits are sign-extended from VA{IMPL_VA_MSB}. As such, there's a gap in 137219691Smarcel * the virtual address range, which extends at most from 0x0004000000000000 138219691Smarcel * to 0x1ffbffffffffffff. We define the top half of a region in terms of 139219691Smarcel * this worst-case gap. 140219691Smarcel */ 141219691Smarcel#define IA64_REGION_TOP_HALF 0x1ffc000000000000 142219691Smarcel 143219691Smarcel/* 144119906Smarcel * Page size of the identity mappings in region 7. 145119906Smarcel */ 146119906Smarcel#ifndef LOG2_ID_PAGE_SIZE 147119906Smarcel#define LOG2_ID_PAGE_SIZE 28 /* 256M */ 148119906Smarcel#endif 149119906Smarcel 150119906Smarcel#define IA64_ID_PAGE_SHIFT (LOG2_ID_PAGE_SIZE) 151119906Smarcel#define IA64_ID_PAGE_SIZE (1<<(LOG2_ID_PAGE_SIZE)) 152119906Smarcel#define IA64_ID_PAGE_MASK (IA64_ID_PAGE_SIZE-1) 153119906Smarcel 154121268Smarcel#define IA64_BACKINGSTORE IA64_RR_BASE(4) 155121268Smarcel 156119906Smarcel/* 157219691Smarcel * Parameters for Pre-Boot Virtual Memory (PBVM). 158219691Smarcel * The kernel, its modules and metadata are loaded in the PBVM by the loader. 159219691Smarcel * The PBVM consists of pages for which the mapping is maintained in a page 160219691Smarcel * table. The page table is at least 1 EFI page large (i.e. 4KB), but can be 161219691Smarcel * larger to accommodate more PBVM. The maximum page table size is 1MB. With 162219691Smarcel * 8 bytes per page table entry, this means that the PBVM has at least 512 163219691Smarcel * pages and at most 128K pages. 164219691Smarcel * The GNU toolchain (in particular GNU ld) does not support an alignment 165219691Smarcel * larger than 64K. This means that we cannot guarantee page alignment for 166219691Smarcel * a page size that's larger than 64K. We do want to have text and data in 167219691Smarcel * different pages, which means that the maximum usable page size is 64KB. 168219691Smarcel * Consequently: 169219691Smarcel * The maximum total PBVM size is 8GB -- enough for a DVD image. A page table 170219691Smarcel * of a single EFI page (4KB) allows for 32MB of PBVM. 171219691Smarcel * 172219691Smarcel * The kernel is given the PA and size of the page table that provides the 173219691Smarcel * mapping of the PBVM. The page table itself is assumed to be mapped at a 174219691Smarcel * known virtual address and using a single translation wired into the CPU. 175219691Smarcel * As such, the page table is assumed to be a power of 2 and naturally aligned. 176219691Smarcel * The kernel also assumes that a good portion of the kernel text is mapped 177219691Smarcel * and wired into the CPU, but does not assume that the mapping covers the 178219691Smarcel * whole of PBVM. 179219691Smarcel */ 180219691Smarcel#define IA64_PBVM_RR 4 181219691Smarcel#define IA64_PBVM_BASE \ 182219691Smarcel (IA64_RR_BASE(IA64_PBVM_RR) + IA64_REGION_TOP_HALF) 183219691Smarcel 184219691Smarcel#define IA64_PBVM_PGTBL_MAXSZ 1048576 185219691Smarcel#define IA64_PBVM_PGTBL \ 186219691Smarcel (IA64_RR_BASE(IA64_PBVM_RR + 1) - IA64_PBVM_PGTBL_MAXSZ) 187219691Smarcel 188219691Smarcel#define IA64_PBVM_PAGE_SHIFT 16 /* 64KB */ 189219691Smarcel#define IA64_PBVM_PAGE_SIZE (1 << IA64_PBVM_PAGE_SHIFT) 190219691Smarcel#define IA64_PBVM_PAGE_MASK (IA64_PBVM_PAGE_SIZE - 1) 191219691Smarcel 192219691Smarcel/* 19366458Sdfr * Mach derived constants 19466458Sdfr */ 19566458Sdfr 19666458Sdfr/* user/kernel map constants */ 19766458Sdfr#define VM_MIN_ADDRESS 0 198219741Smarcel#define VM_MAXUSER_ADDRESS IA64_RR_BASE(5) 199115084Smarcel#define VM_GATEWAY_SIZE PAGE_SIZE 200219741Smarcel#define VM_MIN_KERNEL_ADDRESS (VM_MAXUSER_ADDRESS + VM_GATEWAY_SIZE) 20166458Sdfr#define VM_MAX_KERNEL_ADDRESS (IA64_RR_BASE(6) - 1) 202219741Smarcel#define VM_MAX_ADDRESS ~0UL 20366458Sdfr 204219741Smarcel#define KERNBASE VM_MAXUSER_ADDRESS 20596912Smarcel 20666458Sdfr/* virtual sizes (bytes) for various kernel submaps */ 20766458Sdfr#ifndef VM_KMEM_SIZE 20866458Sdfr#define VM_KMEM_SIZE (12 * 1024 * 1024) 20966458Sdfr#endif 21066458Sdfr 21166458Sdfr/* 21266458Sdfr * How many physical pages per KVA page allocated. 213168920Ssepotvin * min(max(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), 214168920Ssepotvin * VM_KMEM_SIZE_MIN), VM_KMEM_SIZE_MAX) 21566458Sdfr * is the total KVA space allocated for kmem_map. 21666458Sdfr */ 21766458Sdfr#ifndef VM_KMEM_SIZE_SCALE 21866458Sdfr#define VM_KMEM_SIZE_SCALE (4) /* XXX 8192 byte pages */ 21966458Sdfr#endif 22066458Sdfr 22166458Sdfr/* initial pagein size of beginning of executable file */ 22266458Sdfr#ifndef VM_INITIAL_PAGEIN 22366458Sdfr#define VM_INITIAL_PAGEIN 16 22466458Sdfr#endif 22566458Sdfr 226178296Smarcel#endif /* !_MACHINE_VMPARAM_H_ */ 227