/* $NetBSD: vmparam.h,v 1.11 2019/03/29 16:04:54 scole Exp $ */ /*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * 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. * 3. 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. * * @(#)vmparam.h 5.9 (Berkeley) 5/12/91 */ #ifndef _VMPARAM_H_ #define _VMPARAM_H_ #define USRSTACK VM_MAX_ADDRESS /* XXX: Revisit vm address space. */ /* * 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 #define IA64_VM_MINKERN_REGION 4 /* * PTEs for mapping user space into the kernel for phyio operations. * 64 pte's are enough to cover 8 disks * MAXBSIZE. */ #ifndef USRIOSIZE #define USRIOSIZE 64 #endif /* * 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) #define IA64_ID_PAGE_SHIFT 28 /* 256M */ #define IA64_ID_PAGE_SIZE (1 << IA64_ID_PAGE_SHIFT) #define IA64_ID_PAGE_MASK (IA64_ID_PAGE_SIZE-1) /* XXX freebsd uses #define IA64_BACKINGSTORE (USRSTACK - (2 * MAXSSIZ) - PAGE_SIZE) */ #define IA64_BACKINGSTORE IA64_RR_BASE(4) #define PAGE_SHIFT 14 /* 16K pages by default. */ #define PAGE_SIZE (1 << PAGE_SHIFT) #define PAGE_MASK (PAGE_SIZE - 1) /* user/kernel map constants */ #define VM_MIN_ADDRESS ((vaddr_t)0) #define VM_MAX_ADDRESS ((vaddr_t) IA64_RR_BASE(5)) #define VM_GATEWAY_SIZE PAGE_SIZE #define VM_MAXUSER_ADDRESS (VM_MAX_ADDRESS + VM_GATEWAY_SIZE) #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 ((vaddr_t) (IA64_RR_BASE(6) - 1)) //https://nxr.netbsd.org/xref/src/sys/uvm/uvm_page.h#294 #define VM_PHYSSEG_MAX 16 /* XXX: */ #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH //https://nxr.netbsd.org/xref/src/tests/sys/uvm/t_uvm_physseg_load.c#98 #define VM_NFREELIST 1 /* XXX: */ #define VM_FREELIST_DEFAULT 0 /* XXX: */ /* virtual sizes (bytes) for various kernel submaps */ #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) #endif /* _VMPARAM_H_ */