/*- * 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: FreeBSD: src/sys/i386/include/vmparam.h,v 1.33 2000/03/30 */ #ifdef __arm__ #include <arm/vmparam.h> #else /* !__arm__ */ #ifndef _MACHINE_VMPARAM_H_ #define _MACHINE_VMPARAM_H_ /* * Virtual memory related constants, all in bytes */ #ifndef MAXTSIZ #define MAXTSIZ (1*1024*1024*1024) /* max text size */ #endif #ifndef DFLDSIZ #define DFLDSIZ (128*1024*1024) /* initial data size limit */ #endif #ifndef MAXDSIZ #define MAXDSIZ (1*1024*1024*1024) /* max data size */ #endif #ifndef DFLSSIZ #define DFLSSIZ (128*1024*1024) /* initial stack size limit */ #endif #ifndef MAXSSIZ #define MAXSSIZ (1*1024*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. */ #define VM_PHYSSEG_MAX 64 /* * 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 page tables and small UMA objects are allocated. * VM_FREEPOOL_LAZYINIT is a special-purpose pool that is populated only during * boot and is used to implement deferred initialization of page structures. */ #define VM_NFREEPOOL 3 #define VM_FREEPOOL_LAZYINIT 0 #define VM_FREEPOOL_DEFAULT 1 #define VM_FREEPOOL_DIRECT 2 /* * Create two free page lists: VM_FREELIST_DMA32 is for physical pages that have * physical addresses below 4G, and VM_FREELIST_DEFAULT is for all other * physical pages. */ #define VM_NFREELIST 2 #define VM_FREELIST_DEFAULT 0 #define VM_FREELIST_DMA32 1 /* * When PAGE_SIZE is 4KB, an allocation size of 16MB is supported in order * to optimize the use of the direct map by UMA. Specifically, a 64-byte * cache line contains at most 8 L2 BLOCK entries, 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 2MB page TLB misses and cache misses during the page table walk when * a 2MB page TLB miss does occur. * * When PAGE_SIZE is 16KB, an allocation size of 32MB is supported. This * size is used by level 0 reservations and L2 BLOCK mappings. */ #if PAGE_SIZE == PAGE_SIZE_4K #define VM_NFREEORDER 13 #elif PAGE_SIZE == PAGE_SIZE_16K #define VM_NFREEORDER 12 #else #error Unsupported page size #endif /* * Enable superpage reservations: 2 levels. */ #ifndef VM_NRESERVLEVEL #define VM_NRESERVLEVEL 2 #endif /* * Level 0 reservations consist of 16 pages when PAGE_SIZE is 4KB, and 128 * pages when PAGE_SIZE is 16KB. Level 1 reservations consist of 32 64KB * pages when PAGE_SIZE is 4KB, and 16 2M pages when PAGE_SIZE is 16KB. */ #if PAGE_SIZE == PAGE_SIZE_4K #ifndef VM_LEVEL_0_ORDER #define VM_LEVEL_0_ORDER 4 #endif #ifndef VM_LEVEL_1_ORDER #define VM_LEVEL_1_ORDER 5 #endif #elif PAGE_SIZE == PAGE_SIZE_16K #ifndef VM_LEVEL_0_ORDER #define VM_LEVEL_0_ORDER 7 #endif #ifndef VM_LEVEL_1_ORDER #define VM_LEVEL_1_ORDER 4 #endif #else #error Unsupported page size #endif /** * Address space layout. * * ARMv8 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 use the full 48 bits for each region, however the kernel may only use * a limited range within this space. * * Upper region: 0xffffffffffffffff Top of virtual memory * * 0xfffffeffffffffff End of DMAP * 0xffffa00000000000 Start of DMAP * * 0xffff027fffffffff End of KMSAN origin map * 0xffff020000000000 Start of KMSAN origin map * * 0xffff017fffffffff End of KMSAN shadow map * 0xffff010000000000 Start of KMSAN shadow map * * 0xffff009fffffffff End of KASAN shadow map * 0xffff008000000000 Start of KASAN shadow map * * 0xffff007fffffffff End of KVA * 0xffff000000000000 Kernel base address & start of KVA * * Hole: 0xfffeffffffffffff * 0x0001000000000000 * * Lower region: 0x0000ffffffffffff End of user address space * 0x0000000000000000 Start of user address space * * 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) /* 512 GiB of kernel addresses */ #define VM_MIN_KERNEL_ADDRESS (0xffff000000000000UL) #define VM_MAX_KERNEL_ADDRESS (0xffff008000000000UL) /* 128 GiB KASAN shadow map */ #define KASAN_MIN_ADDRESS (0xffff008000000000UL) #define KASAN_MAX_ADDRESS (0xffff00a000000000UL) /* 512GiB KMSAN shadow map */ #define KMSAN_SHAD_MIN_ADDRESS (0xffff010000000000UL) #define KMSAN_SHAD_MAX_ADDRESS (0xffff018000000000UL) /* 512GiB KMSAN origin map */ #define KMSAN_ORIG_MIN_ADDRESS (0xffff020000000000UL) #define KMSAN_ORIG_MAX_ADDRESS (0xffff028000000000UL) /* The address bits that hold a pointer authentication code */ #define PAC_ADDR_MASK (0x007f000000000000UL) #define PAC_ADDR_MASK_14 (0xff7f000000000000UL) /* The top-byte ignore address bits */ #define TBI_ADDR_MASK 0xff00000000000000UL /* If true addr is in the kernel address space */ #define ADDR_IS_KERNEL(addr) (((addr) & (1ul << 55)) == (1ul << 55)) /* If true addr is in the user address space */ #define ADDR_IS_USER(addr) (((addr) & (1ul << 55)) == 0) /* If true addr is in its canonical form (i.e. no TBI, PAC, etc.) */ #define ADDR_IS_CANONICAL(addr) \ (((addr) & 0xffff000000000000UL) == 0 || \ ((addr) & 0xffff000000000000UL) == 0xffff000000000000UL) #define ADDR_MAKE_CANONICAL(addr) ({ \ __typeof(addr) _tmp_addr = (addr); \ \ _tmp_addr &= ~0xffff000000000000UL; \ if (ADDR_IS_KERNEL(addr)) \ _tmp_addr |= 0xffff000000000000UL; \ \ _tmp_addr; \ }) /* 95 TiB maximum for the direct map region */ #define DMAP_MIN_ADDRESS (0xffffa00000000000UL) #define DMAP_MAX_ADDRESS (0xffffff0000000000UL) #define DMAP_MIN_PHYSADDR (dmap_phys_base) #define DMAP_MAX_PHYSADDR (dmap_phys_max) /* * Checks to see if a physical address is in the DMAP range. * - PHYS_IN_DMAP_RANGE will return true that may be within the DMAP range * but not accessible through the DMAP, e.g. device memory between two * DMAP physical address regions. * - PHYS_IN_DMAP will check if DMAP address is mapped before returning true. * * PHYS_IN_DMAP_RANGE should only be used when a check on the address is * performed, e.g. by checking the physical address is within phys_avail, * or checking the virtual address is mapped. */ #define PHYS_IN_DMAP_RANGE(pa) ((pa) >= DMAP_MIN_PHYSADDR && \ (pa) < DMAP_MAX_PHYSADDR) #define PHYS_IN_DMAP(pa) (PHYS_IN_DMAP_RANGE(pa) && \ pmap_klookup(PHYS_TO_DMAP(pa), NULL)) /* True if va is in the dmap range */ #define VIRT_IN_DMAP(va) ((va) >= DMAP_MIN_ADDRESS && \ (va) < (dmap_max_addr)) #define PMAP_HAS_DMAP 1 #define PHYS_TO_DMAP(pa) \ ({ \ KASSERT(PHYS_IN_DMAP_RANGE(pa), \ ("%s: PA out of range, PA: 0x%lx", __func__, \ (vm_paddr_t)(pa))); \ ((pa) - dmap_phys_base) + 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) + dmap_phys_base; \ }) #define VM_MIN_USER_ADDRESS (0x0000000000000000UL) #define VM_MAX_USER_ADDRESS (0x0001000000000000UL) #define VM_MINUSER_ADDRESS (VM_MIN_USER_ADDRESS) #define VM_MAXUSER_ADDRESS (VM_MAX_USER_ADDRESS) #define KERNBASE (VM_MIN_KERNEL_ADDRESS) #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE) #define USRSTACK SHAREDPAGE /* * How many physical pages per kmem arena virtual page. */ #ifndef VM_KMEM_SIZE_SCALE #define VM_KMEM_SIZE_SCALE (1) #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 #if !defined(KASAN) && !defined(KMSAN) #define UMA_USE_DMAP #endif #ifndef LOCORE extern vm_paddr_t dmap_phys_base; extern vm_paddr_t dmap_phys_max; extern vm_offset_t dmap_max_addr; #endif #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ #define DEVMAP_MAX_VADDR VM_MAX_KERNEL_ADDRESS /* * The pmap can create non-transparent large page mappings. */ #define PMAP_HAS_LARGEPAGES 1 /* * Need a page dump array for minidump. */ #define MINIDUMP_PAGE_TRACKING 1 #define MINIDUMP_STARTUP_PAGE_TRACKING 1 #endif /* !_MACHINE_VMPARAM_H_ */ #endif /* !__arm__ */
