/*- * 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 /* * Only one memory domain. */ #ifndef VM_NDOMAIN #define VM_NDOMAIN 1 #endif /* * 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 IA64_RR_BASE(IA64_VM_MINKERN_REGION + 1) #define VM_MAX_KERNEL_ADDRESS \ (VM_MIN_KERNEL_ADDRESS + IA64_REGION_GAP_START - 1) #define VM_MAX_ADDRESS ~0UL #define KERNBASE VM_MAXUSER_ADDRESS /* * 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) /* virtual sizes (bytes) for various kernel submaps */ #ifndef VM_KMEM_SIZE #define VM_KMEM_SIZE (12 * 1024 * 1024) #endif /* * How many physical pages per KVA page allocated. * min(max(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), * VM_KMEM_SIZE_MIN), VM_KMEM_SIZE_MAX) * is the total KVA space allocated for kmem_map. */ #ifndef VM_KMEM_SIZE_SCALE #define VM_KMEM_SIZE_SCALE (4) /* XXX 8192 byte pages */ #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_ */