diff options
Diffstat (limited to 'sys/riscv/include/vmparam.h')
| -rw-r--r-- | sys/riscv/include/vmparam.h | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/sys/riscv/include/vmparam.h b/sys/riscv/include/vmparam.h new file mode 100644 index 0000000..08d3c3b --- /dev/null +++ b/sys/riscv/include/vmparam.h @@ -0,0 +1,239 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * Copyright (c) 1994 John S. Dyson + * 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. + * + * from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91 + * from: FreeBSD: src/sys/i386/include/vmparam.h,v 1.33 2000/03/30 + * $FreeBSD$ + */ + +#ifndef _MACHINE_VMPARAM_H_ +#define _MACHINE_VMPARAM_H_ + +/* + * Virtual memory related constants, all in bytes + */ +#ifndef MAXTSIZ +#define MAXTSIZ (32*1024*1024) /* max text size */ +#endif +#ifndef DFLDSIZ +#define DFLDSIZ (128*1024*1024) /* initial data size limit */ +#endif +#ifndef MAXDSIZ +#define MAXDSIZ (128*1024*1024) /* max data size */ +#endif +#ifndef DFLSSIZ +#define DFLSSIZ (2*1024*1024) /* initial stack size limit */ +#endif +#ifndef MAXSSIZ +#define MAXSSIZ (8*1024*1024) /* max stack size */ +#endif +#ifndef SGROWSIZ +#define SGROWSIZ (128*1024) /* amount to grow stack */ +#endif + +/* + * The physical address space is sparsely populated. + */ +#define VM_PHYSSEG_SPARSE + +/* + * The number of PHYSSEG entries must be one greater than the number + * of phys_avail entries because the phys_avail entry that spans the + * largest physical address that is accessible by ISA DMA is split + * into two PHYSSEG entries. + */ +#define VM_PHYSSEG_MAX 64 + +/* + * Create two 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 2 +#define VM_FREEPOOL_DEFAULT 0 +#define VM_FREEPOOL_DIRECT 1 + +/* + * Create two free page lists: VM_FREELIST_DEFAULT is for physical + * pages that are above the largest physical address that is + * accessible by ISA DMA and VM_FREELIST_ISADMA is for physical pages + * that are below that address. + */ +#define VM_NFREELIST 2 +#define VM_FREELIST_DEFAULT 0 +#define VM_FREELIST_ISADMA 1 + +/* + * An allocation size of 16MB is supported in order to optimize the + * use of the direct map by UMA. Specifically, a cache line contains + * at most four TTEs, collectively mapping 16MB of physical memory. + * By reducing the number of distinct 16MB "pages" that are used by UMA, + * the physical memory allocator reduces the likelihood of both 4MB + * page TLB misses and cache misses caused by 4MB page TLB misses. + */ +#define VM_NFREEORDER 12 + +/* + * Enable superpage reservations: 1 level. + */ +#ifndef VM_NRESERVLEVEL +#define VM_NRESERVLEVEL 1 +#endif + +/* + * Level 0 reservations consist of 512 pages. + */ +#ifndef VM_LEVEL_0_ORDER +#define VM_LEVEL_0_ORDER 9 +#endif + +/** + * Address space layout. + * + * RISC-V implements up to a 48 bit virtual address space. The address space is + * split into 2 regions at each end of the 64 bit address space, with an + * out of range "hole" in the middle. + * + * We limit the size of the two spaces to 39 bits each. + * + * Upper region: 0xffffffffffffffff + * 0xffffffffc0000000 + * + * Hole: 0xffffffffbfffffff + * 0x0000000080000000 + * + * Lower region: 0x000000007fffffff + * 0x0000000000000000 + * + * We use the upper region for the kernel, and the lower region for userland. + * + * We define some interesting address constants: + * + * VM_MIN_ADDRESS and VM_MAX_ADDRESS define the start and end of the entire + * 64 bit address space, mostly just for convenience. + * + * VM_MIN_KERNEL_ADDRESS and VM_MAX_KERNEL_ADDRESS define the start and end of + * mappable kernel virtual address space. + * + * VM_MIN_USER_ADDRESS and VM_MAX_USER_ADDRESS define the start and end of the + * user address space. + */ +#define VM_MIN_ADDRESS (0x0000000000000000UL) +#define VM_MAX_ADDRESS (0xffffffffffffffffUL) + +/* 256 MiB of kernel addresses */ +#define VM_MIN_KERNEL_ADDRESS (0xffffffffc0000000UL) +#define VM_MAX_KERNEL_ADDRESS (0xffffffffcfffffffUL) + +/* Direct Map for 512 MiB of PA: 0x0 - 0x1fffffff */ +#define DMAP_MIN_ADDRESS (0xffffffffd0000000UL) +#define DMAP_MAX_ADDRESS (0xffffffffefffffffUL) + +#define DMAP_MIN_PHYSADDR (0x0000000000000000UL) +#define DMAP_MAX_PHYSADDR (DMAP_MAX_ADDRESS - DMAP_MIN_ADDRESS) + +/* True if pa is in the dmap range */ +#define PHYS_IN_DMAP(pa) ((pa) <= DMAP_MAX_PHYSADDR) +/* True if va is in the dmap range */ +#define VIRT_IN_DMAP(va) ((va) >= DMAP_MIN_ADDRESS && \ + (va) <= DMAP_MAX_ADDRESS) + +#define PHYS_TO_DMAP(pa) \ +({ \ + KASSERT(PHYS_IN_DMAP(pa), \ + ("%s: PA out of range, PA: 0x%lx", __func__, \ + (vm_paddr_t)(pa))); \ + (pa) | DMAP_MIN_ADDRESS; \ +}) + +#define DMAP_TO_PHYS(va) \ +({ \ + KASSERT(VIRT_IN_DMAP(va), \ + ("%s: VA out of range, VA: 0x%lx", __func__, \ + (vm_offset_t)(va))); \ + (va) & ~DMAP_MIN_ADDRESS; \ +}) + +#define VM_MIN_USER_ADDRESS (0x0000000000000000UL) +#define VM_MAX_USER_ADDRESS (0x0000000080000000UL) + +#define VM_MINUSER_ADDRESS (VM_MIN_USER_ADDRESS) +#define VM_MAXUSER_ADDRESS (VM_MAX_USER_ADDRESS) + +#define KERNBASE (VM_MIN_KERNEL_ADDRESS) +#define USRSTACK (VM_MAX_USER_ADDRESS) +#define KERNENTRY (0x200) + +/* + * How many physical pages per kmem arena virtual page. + */ +#ifndef VM_KMEM_SIZE_SCALE +#define VM_KMEM_SIZE_SCALE (3) +#endif + +/* + * Optional floor (in bytes) on the size of the kmem arena. + */ +#ifndef VM_KMEM_SIZE_MIN +#define VM_KMEM_SIZE_MIN (16 * 1024 * 1024) +#endif + +/* + * Optional ceiling (in bytes) on the size of the kmem arena: 60% of the + * kernel map. + */ +#ifndef VM_KMEM_SIZE_MAX +#define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \ + VM_MIN_KERNEL_ADDRESS + 1) * 3 / 5) +#endif + +/* + * Initial pagein size of beginning of executable file. + */ +#ifndef VM_INITIAL_PAGEIN +#define VM_INITIAL_PAGEIN 16 +#endif + +/* + * RISCVTODO + * #define UMA_MD_SMALL_ALLOC + */ + +extern u_int tsb_kernel_ldd_phys; +extern vm_offset_t vm_max_kernel_address; +extern vm_offset_t init_pt_va; + +#define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ + +#endif /* !_MACHINE_VMPARAM_H_ */ |
