/* $OpenBSD: hibernate_var.h,v 1.14 2025/09/13 13:43:47 mlarkin Exp $ */ /* * Copyright (c) 2011 Mike Larkin <mlarkin@openbsd.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #define PIGLET_PAGE_MASK (L2_FRAME) /* * PML4 table for resume */ #define HIBERNATE_PML4T (PAGE_SIZE * 21) /* * amd64 uses a PDPT to map the first 512GB phys mem plus one more * to map any ranges of phys mem past 512GB (if needed) */ #define HIBERNATE_PDPT_LOW (PAGE_SIZE * 22) #define HIBERNATE_PDPT_HI (PAGE_SIZE * 23) /* * amd64 uses one PD to map the first 1GB phys mem plus one more to map any * other 1GB ranges within the first 512GB phys, plus one more to map any * 1GB range in any subsequent 512GB range */ #define HIBERNATE_PD_LOW (PAGE_SIZE * 24) #define HIBERNATE_PD_LOW2 (PAGE_SIZE * 25) #define HIBERNATE_PD_HI (PAGE_SIZE * 26) /* * amd64 uses one PT to map the first 2MB phys mem plus one more to map any * other 2MB range within the first 1GB, plus one more to map any 2MB range * in any subsequent 512GB range. */ #define HIBERNATE_PT_LOW (PAGE_SIZE * 27) #define HIBERNATE_PT_LOW2 (PAGE_SIZE * 28) #define HIBERNATE_PT_HI (PAGE_SIZE * 29) /* 3 pages for stack */ #define HIBERNATE_STACK_PAGE (PAGE_SIZE * 32) #define HIBERNATE_INFLATE_PAGE (PAGE_SIZE * 33) /* HIBERNATE_HIBALLOC_PAGE must be the last stolen page (see machdep.c) */ #define HIBERNATE_HIBALLOC_PAGE (PAGE_SIZE * 34) /* Use 4MB hibernation chunks */ #define HIBERNATE_CHUNK_SIZE 0x400000 #define HIBERNATE_CHUNK_TABLE_SIZE 0x200000 #define HIBERNATE_STACK_OFFSET 0x0F00 /* * Minimum amount of memory for hibernate support. This is used in early boot * when deciding if we can preallocate the piglet. If the machine does not * have at least HIBERNATE_MIN_MEMORY RAM, we won't support hibernate. This * avoids late allocation issues due to fragmented memory and failure to * hibernate. We need to be able to allocate 16MB contiguous memory, aligned * to 2MB. * * The default minimum required memory is 512MB (1ULL << 29). */ #define HIBERNATE_MIN_MEMORY (1ULL << 29)
