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sys/param.h was manually adjusted to not define __NetBSD_Version__ since it will be defined by the compiler.
203 lines
No EOL
6.8 KiB
C
Vendored
203 lines
No EOL
6.8 KiB
C
Vendored
/* $NetBSD: vmparam.h,v 1.13 2022/10/16 06:14:53 skrll Exp $ */
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/*-
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* Copyright (c) 2014, 2020 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry, and Nick Hudson.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RISCV_VMPARAM_H_
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#define _RISCV_VMPARAM_H_
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#include <riscv/param.h>
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#ifdef _KERNEL_OPT
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#include "opt_multiprocessor.h"
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#endif
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/*
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* Machine dependent VM constants for RISCV.
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*/
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/*
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* We use a 4K page on both RV64 and RV32 systems.
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* Override PAGE_* definitions to compile-time constants.
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*/
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#define PAGE_SHIFT PGSHIFT
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#define PAGE_SIZE (1 << PAGE_SHIFT)
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#define PAGE_MASK (PAGE_SIZE - 1)
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/*
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* USRSTACK is the top (end) of the user stack.
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*
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* USRSTACK needs to start a page below the maxuser address so that a memory
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* access with a maximum displacement (0x7ff) won't cross into the kernel's
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* address space. We use PAGE_SIZE instead of 0x800 since these need to be
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* page-aligned.
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*/
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#define USRSTACK (VM_MAXUSER_ADDRESS-PAGE_SIZE) /* Start of user stack */
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#define USRSTACK32 ((uint32_t)VM_MAXUSER_ADDRESS32-PAGE_SIZE)
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/*
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* Virtual memory related constants, all in bytes
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*/
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#ifndef MAXTSIZ
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#define MAXTSIZ (128*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (256*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (1536*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (120*1024*1024) /* max stack size */
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#endif
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/*
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* Virtual memory related constants, all in bytes
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*/
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#ifndef DFLDSIZ32
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#define DFLDSIZ32 DFLDSIZ /* initial data size limit */
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#endif
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#ifndef MAXDSIZ32
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#define MAXDSIZ32 MAXDSIZ /* max data size */
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#endif
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#ifndef DFLSSIZ32
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#define DFLSSIZ32 DFLTSIZ /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ32
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#define MAXSSIZ32 MAXSSIZ /* max stack size */
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#endif
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/*
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* PTEs for mapping user space into the kernel for phyio operations.
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* The default PTE number is enough to cover 8 disks * MAXBSIZE.
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*/
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#ifndef USRIOSIZE
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#define USRIOSIZE (MAXBSIZE/PAGE_SIZE * 8)
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#endif
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/*
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* User/kernel map constants.
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*/
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#define VM_MIN_ADDRESS ((vaddr_t)0x00000000)
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#ifdef _LP64 /* Sv39 / Sv48 / Sv57 */
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/*
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* kernel virtual space layout:
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* 0xffff_ffc0_0000_0000 - 64GiB KERNEL VM Space (inc. text/data/bss)
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* (0xffff_ffc0_4000_0000 +1GiB) KERNEL VM start of KVA
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* (0xffff_ffd0_0000_0000 64GiB) reserved
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* 0xffff_ffe0_0000_0000 - 128GiB direct mapping
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*/
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#define VM_MAXUSER_ADDRESS ((vaddr_t)0x0000004000000000 - 16 * PAGE_SIZE)
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xffffffc000000000)
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xffffffd000000000)
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#else /* Sv32 */
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#define VM_MAXUSER_ADDRESS ((vaddr_t)-0x7fffffff-1)/* 0xffffffff80000000 */
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)-0x7fffffff-1)/* 0xffffffff80000000 */
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-0x40000000) /* 0xffffffffc0000000 */
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#endif
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#define VM_KERNEL_BASE VM_MIN_KERNEL_ADDRESS
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#define VM_KERNEL_SIZE 0x2000000 /* 32 MiB (8 / 16 megapages) */
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#define VM_KERNEL_DTB_BASE (VM_KERNEL_BASE + VM_KERNEL_SIZE)
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#define VM_KERNEL_DTB_SIZE 0x1000000 /* 16 MiB (4 / 8 megapages) */
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#define VM_KERNEL_IO_BASE (VM_KERNEL_DTB_BASE + VM_KERNEL_DTB_SIZE)
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#define VM_KERNEL_IO_SIZE 0x1000000 /* 16 MiB (4 / 8 megapages) */
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#define VM_KERNEL_RESERVED (VM_KERNEL_SIZE + VM_KERNEL_DTB_SIZE + VM_KERNEL_IO_SIZE)
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#define VM_KERNEL_VM_BASE (VM_MIN_KERNEL_ADDRESS + VM_KERNEL_RESERVED)
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#define VM_KERNEL_VM_SIZE (VM_MAX_KERNEL_ADDRESS - VM_KERNEL_VM_BASE)
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#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
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#define VM_MAXUSER_ADDRESS32 ((vaddr_t)(1UL << 31))/* 0x0000000080000000 */
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#ifdef _LP64
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/*
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* Since we have the address space, we map all of physical memory (RAM)
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* using gigapages on SV39, terapages on SV48 and petapages on SV57.
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*/
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#define RISCV_DIRECTMAP_MASK ((vaddr_t) 0xffffffe000000000L)
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#define RISCV_DIRECTMAP_SIZE (-RISCV_DIRECTMAP_MASK - PAGE_SIZE) /* 128GiB */
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#define RISCV_DIRECTMAP_START RISCV_DIRECTMAP_MASK
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#define RISCV_DIRECTMAP_END (RISCV_DIRECTMAP_START + RISCV_DIRECTMAP_SIZE)
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#define RISCV_KVA_P(va) (((vaddr_t) (va) & RISCV_DIRECTMAP_MASK) != 0)
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#define RISCV_PA_TO_KVA(pa) ((vaddr_t) ((pa) | RISCV_DIRECTMAP_START))
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#define RISCV_KVA_TO_PA(va) ((paddr_t) ((va) & ~RISCV_DIRECTMAP_MASK))
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#endif
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/*
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* The address to which unspecified mapping requests default
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*/
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#define __USE_TOPDOWN_VM
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#define VM_DEFAULT_ADDRESS_TOPDOWN(da, sz) \
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trunc_page(USRSTACK - MAXSSIZ - (sz) - user_stack_guard_size)
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#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
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round_page((vaddr_t)(da) + (vsize_t)maxdmap)
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#define VM_DEFAULT_ADDRESS32_TOPDOWN(da, sz) \
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trunc_page(USRSTACK32 - MAXSSIZ32 - (sz) - user_stack_guard_size)
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#define VM_DEFAULT_ADDRESS32_BOTTOMUP(da, sz) \
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round_page((vaddr_t)(da) + (vsize_t)MAXDSIZ32)
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/* virtual sizes (bytes) for various kernel submaps */
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#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
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/* VM_PHYSSEG_MAX defined by platform-dependent code. */
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#ifndef VM_PHYSSEG_MAX
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#define VM_PHYSSEG_MAX 16
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#endif
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#if VM_PHYSSEG_MAX == 1
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
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#else
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
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#endif
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#define VM_PHYSSEG_NOADD /* can add RAM after vm_mem_init */
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#ifndef VM_NFREELIST
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#define VM_NFREELIST 2 /* 2 distinct memory segments */
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#define VM_FREELIST_DEFAULT 0
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#define VM_FREELIST_DIRECTMAP 1
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#endif
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#ifdef _KERNEL
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#define UVM_KM_VMFREELIST riscv_poolpage_vmfreelist
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extern int riscv_poolpage_vmfreelist;
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#ifdef _LP64
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void * cpu_uarea_alloc(bool);
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bool cpu_uarea_free(void *);
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#endif
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#endif
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#endif /* ! _RISCV_VMPARAM_H_ */ |