xnu-7195.101.1.tar.gz

[apple/xnu.git] / osfmk / i386 / hibernate_restore.c

/*
 * Copyright (c) 2008 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*!
 * i386/x86_64-specific functions required to support hibernation resume.
 */

#include <i386/pmap.h>
#include <i386/proc_reg.h>
#include <IOKit/IOHibernatePrivate.h>
#include <vm/WKdm_new.h>

#include <machine/pal_hibernate.h>

extern pd_entry_t BootPTD[2048];

// src is virtually mapped, not page aligned,
// dst is a physical 4k page aligned ptr, len is one 4K page
// src & dst will not overlap

uintptr_t
hibernate_restore_phys_page(uint64_t src, uint64_t dst, uint32_t len, uint32_t procFlags)
{
	(void)procFlags;
	uint64_t * d;
	uint64_t * s;

	if (src == 0) {
		return (uintptr_t)dst;
	}

	d = (uint64_t *)pal_hib_map(DEST_COPY_AREA, dst);
	s = (uint64_t *) (uintptr_t)src;

	__nosan_memcpy(d, s, len);

	return (uintptr_t)d;
}
#undef hibprintf

void hibprintf(const char *fmt, ...);

uintptr_t
pal_hib_map(uintptr_t virt, uint64_t phys)
{
	uintptr_t index;

	switch (virt) {
	case DEST_COPY_AREA:
	case SRC_COPY_AREA:
	case COPY_PAGE_AREA:
	case BITMAP_AREA:
	case IMAGE_AREA:
	case IMAGE2_AREA:
	case SCRATCH_AREA:
	case WKDM_AREA:
		break;

	default:
		asm("cli;hlt;");
		break;
	}
	if (phys < WKDM_AREA) {
		// first 4Gb is all mapped,
		// and do not expect source areas to cross 4Gb
		return phys;
	}
	index = (virt >> I386_LPGSHIFT);
	virt += (uintptr_t)(phys & I386_LPGMASK);
	phys  = ((phys & ~((uint64_t)I386_LPGMASK)) | INTEL_PTE_PS  | INTEL_PTE_VALID | INTEL_PTE_WRITE);
	if (phys == BootPTD[index]) {
		return virt;
	}
	BootPTD[index] = phys;
	invlpg(virt);
	BootPTD[index + 1] = (phys + I386_LPGBYTES);
	invlpg(virt + I386_LPGBYTES);

	return virt;
}

void
pal_hib_restore_pal_state(uint32_t *arg)
{
	(void)arg;
}

void
pal_hib_resume_init(__unused pal_hib_ctx_t *ctx, __unused hibernate_page_list_t *map, __unused uint32_t *nextFree)
{
}

void
pal_hib_restored_page(__unused pal_hib_ctx_t *ctx, __unused pal_hib_restore_stage_t stage, __unused ppnum_t ppnum)
{
}

void
pal_hib_patchup(__unused pal_hib_ctx_t *ctx)
{
}

void
pal_hib_decompress_page(void *src, void *dst, void *scratch, unsigned int compressedSize)
{
	WKdm_decompress_new((WK_word*)src, (WK_word*)dst, (WK_word*)scratch, compressedSize);
}