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	1	/*
	2	* Copyright (c) 2008 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28	/*!
	29	* i386/x86_64-specific functions required to support hibernation resume.
	30	*/
	31
	32	#include <i386/pmap.h>
	33	#include <i386/proc_reg.h>
	34	#include <IOKit/IOHibernatePrivate.h>
	35	#include <vm/WKdm_new.h>
	36
	37	#include <machine/pal_hibernate.h>
	38
	39	extern pd_entry_t BootPTD[2048];
	40
	41	// src is virtually mapped, not page aligned,
	42	// dst is a physical 4k page aligned ptr, len is one 4K page
	43	// src & dst will not overlap
	44
	45	uintptr_t
	46	hibernate_restore_phys_page(uint64_t src, uint64_t dst, uint32_t len, uint32_t procFlags)
	47	{
	48	(void)procFlags;
	49	uint64_t * d;
	50	uint64_t * s;
	51
	52	if (src == 0) {
	53	return (uintptr_t)dst;
	54	}
	55
	56	d = (uint64_t *)pal_hib_map(DEST_COPY_AREA, dst);
	57	s = (uint64_t *) (uintptr_t)src;
	58
	59	__nosan_memcpy(d, s, len);
	60
	61	return (uintptr_t)d;
	62	}
	63	#undef hibprintf
	64
	65	void hibprintf(const char *fmt, ...);
	66
	67	uintptr_t
	68	pal_hib_map(uintptr_t virt, uint64_t phys)
	69	{
	70	uintptr_t index;
	71
	72	switch (virt) {
	73	case DEST_COPY_AREA:
	74	case SRC_COPY_AREA:
	75	case COPY_PAGE_AREA:
	76	case BITMAP_AREA:
	77	case IMAGE_AREA:
	78	case IMAGE2_AREA:
	79	case SCRATCH_AREA:
	80	case WKDM_AREA:
	81	break;
	82
	83	default:
	84	asm("cli;hlt;");
	85	break;
	86	}
	87	if (phys < WKDM_AREA) {
	88	// first 4Gb is all mapped,
	89	// and do not expect source areas to cross 4Gb
	90	return phys;
	91	}
	92	index = (virt >> I386_LPGSHIFT);
	93	virt += (uintptr_t)(phys & I386_LPGMASK);
	94	phys = ((phys & ~((uint64_t)I386_LPGMASK)) \| INTEL_PTE_PS \| INTEL_PTE_VALID \| INTEL_PTE_WRITE);
	95	if (phys == BootPTD[index]) {
	96	return virt;
	97	}
	98	BootPTD[index] = phys;
	99	invlpg(virt);
	100	BootPTD[index + 1] = (phys + I386_LPGBYTES);
	101	invlpg(virt + I386_LPGBYTES);
	102
	103	return virt;
	104	}
	105
	106	void
	107	pal_hib_restore_pal_state(uint32_t *arg)
	108	{
	109	(void)arg;
	110	}
	111
	112	void
	113	pal_hib_resume_init(__unused pal_hib_ctx_t ctx, __unused hibernate_page_list_t map, __unused uint32_t *nextFree)
	114	{
	115	}
	116
	117	void
	118	pal_hib_restored_page(__unused pal_hib_ctx_t *ctx, __unused pal_hib_restore_stage_t stage, __unused ppnum_t ppnum)
	119	{
	120	}
	121
	122	void
	123	pal_hib_patchup(__unused pal_hib_ctx_t *ctx)
	124	{
	125	}
	126
	127	void
	128	pal_hib_decompress_page(void src, void dst, void *scratch, unsigned int compressedSize)
	129	{
	130	WKdm_decompress_new((WK_word)src, (WK_word)dst, (WK_word*)scratch, compressedSize);
	131	}