/* $NetBSD: vmparam.h,v 1.1.12.1 2017/08/31 08:32:39 bouyer Exp $ */ /*- * Copyright (c) 2014 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #ifndef _RISCV_VMPARAM_H_ #define _RISCV_VMPARAM_H_ #include #ifdef _KERNEL_OPT #include "opt_multiprocessor.h" #endif /* * Machine dependent VM constants for RISCV. */ /* * We use a 8K page on RV64 and 4K on RV32 systems. * Override PAGE_* definitions to compile-time constants. */ #define PAGE_SHIFT PGSHIFT #define PAGE_SIZE (1 << PAGE_SHIFT) #define PAGE_MASK (PAGE_SIZE - 1) /* * USRSTACK is the top (end) of the user stack. * * USRSTACK needs to start a page below the maxuser address so that a memory * access with a maximum displacement (0x7ff) won't cross into the kernel's * address space. We use PAGE_SIZE instead of 0x800 since these need to be * page-aligned. */ #define USRSTACK (VM_MAXUSER_ADDRESS-PAGE_SIZE) /* Start of user stack */ #define USRSTACK32 ((uint32_t)VM_MAXUSER32_ADDRESS-PAGE_SIZE) /* * Virtual memory related constants, all in bytes */ #ifndef MAXTSIZ #define MAXTSIZ (128*1024*1024) /* max text size */ #endif #ifndef DFLDSIZ #define DFLDSIZ (256*1024*1024) /* initial data size limit */ #endif #ifndef MAXDSIZ #define MAXDSIZ (1536*1024*1024) /* max data size */ #endif #ifndef DFLSSIZ #define DFLSSIZ (16*1024*1024) /* initial stack size limit */ #endif #ifndef MAXSSIZ #define MAXSSIZ (120*1024*1024) /* max stack size */ #endif /* * Virtual memory related constants, all in bytes */ #ifndef MAXTSIZ32 #define MAXTSIZ32 MAXTSIZ /* max text size */ #endif #ifndef DFLDSIZ32 #define DFLDSIZ32 DFLDSIZ /* initial data size limit */ #endif #ifndef MAXDSIZ32 #define MAXDSIZ32 MAXDSIZ /* max data size */ #endif #ifndef DFLSSIZ32 #define DFLSSIZ32 DFLTSIZ /* initial stack size limit */ #endif #ifndef MAXSSIZ32 #define MAXSSIZ32 MAXSSIZ /* max stack size */ #endif /* * PTEs for mapping user space into the kernel for phyio operations. * The default PTE number is enough to cover 8 disks * MAXBSIZE. */ #ifndef USRIOSIZE #define USRIOSIZE (MAXBSIZE/PAGE_SIZE * 8) #endif // user/kernel map constants // These use negative addresses since RISCV addresses are signed. #define VM_MIN_ADDRESS ((vaddr_t)0x00000000) #ifdef _LP64 #define VM_MAXUSER_ADDRESS ((vaddr_t) 1L << 42) /* 0x0000040000000000 */ // For 64-bit kernels, we could, in theory, have 8TB (42 (13+29) bits worth) // of KVA space. We need to divide that between KVA for direct-mapped memory, // space for I/O devices (someday), the kernel's mapped space. For now, we are // going to restrict ourselves to use highest 8GB of KVA. The highest 2GB of // that KVA will be used to direct map memory. #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) -PAGE_SIZE << 18) /* 0xFFFFFFFF80000000 */ #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) -PAGE_SIZE << 20) /* 0xFFFFFFFE00000000 */ #else #define VM_MAXUSER_ADDRESS ((vaddr_t)-0x7fffffff-1)/* 0xFFFFFFFF80000000 */ // We reserve the bottom (nonnegative) address for user, then split the upper // 2GB into two 1GB, the lower for mapped KVA and the upper for direct-mapped. #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)-0x7fffffff-1)/* 0xFFFFFFFF80000000 */ #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-0x40000000) /* 0xFFFFFFFFC0000000 */ #endif #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS #define VM_MAXUSER32_ADDRESS ((vaddr_t)(1UL << 31))/* 0x0000000080000000 */ /* * The address to which unspecified mapping requests default */ #define __USE_TOPDOWN_VM #define VM_DEFAULT_ADDRESS_TOPDOWN(da, sz) \ trunc_page(USRSTACK - MAXSSIZ - (sz) - user_stack_guard_size) #define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \ round_page((vaddr_t)(da) + (vsize_t)maxdmap) #define VM_DEFAULT_ADDRESS32_TOPDOWN(da, sz) \ trunc_page(USRSTACK32 - MAXSSIZ32 - (sz) - user_stack_guard_size) #define VM_DEFAULT_ADDRESS32_BOTTOMUP(da, sz) \ round_page((vaddr_t)(da) + (vsize_t)MAXDSIZ32) /* virtual sizes (bytes) for various kernel submaps */ #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) /* VM_PHYSSEG_MAX defined by platform-dependent code. */ #ifndef VM_PHYSSEG_MAX #define VM_PHYSSEG_MAX 1 #endif #if VM_PHYSSEG_MAX == 1 #define VM_PHYSSEG_STRAT VM_PSTRAT_LINEAR #else #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH #endif #define VM_PHYSSEG_NOADD /* can add RAM after vm_mem_init */ #ifndef VM_NFREELIST #define VM_NFREELIST 2 /* 2 distinct memory segments */ #define VM_FREELIST_DEFAULT 0 #define VM_FREELIST_DIRECTMAP 1 #endif #ifdef _KERNEL #define UVM_KM_VMFREELIST riscv_poolpage_vmfreelist extern int riscv_poolpage_vmfreelist; #ifdef _LP64 void * cpu_uarea_alloc(bool); bool cpu_uarea_free(void *); #endif #endif #endif /* ! _RISCV_VMPARAM_H_ */