osfmk/i386/hibernate_restore.c

   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 #include <i386/pmap.h>
  29 #include <i386/proc_reg.h>
  30 #include <IOKit/IOHibernatePrivate.h>
  31
  32 #include <i386/pal_hibernate.h>
  33
  34 extern pd_entry_t BootPTD[2048];
  35
  36 // src is virtually mapped, not page aligned,
  37 // dst is a physical 4k page aligned ptr, len is one 4K page
  38 // src & dst will not overlap
  39
  40 uintptr_t
  41 hibernate_restore_phys_page(uint64_t src, uint64_t dst, uint32_t len, uint32_t procFlags)
  42 {
  43         (void)procFlags;
  44         uint64_t * d;
  45         uint64_t * s;
  46
  47         if (src == 0)
  48                 return (uintptr_t)dst;
  49
  50         d = (uint64_t *)pal_hib_map(DEST_COPY_AREA, dst);
  51         s = (uint64_t *) (uintptr_t)src;
  52
  53         __nosan_memcpy(d, s, len);
  54
  55         return (uintptr_t)d;
  56 }
  57 #undef hibprintf
  58
  59 void hibprintf(const char *fmt, ...);
  60
  61 uintptr_t
  62 pal_hib_map(uintptr_t virt, uint64_t phys)
  63 {
  64     uintptr_t index;
  65
  66     switch (virt)
  67     {
  68         case DEST_COPY_AREA:
  69         case SRC_COPY_AREA:
  70         case COPY_PAGE_AREA:
  71         case BITMAP_AREA:
  72         case IMAGE_AREA:
  73         case IMAGE2_AREA:
  74             break;
  75
  76         default:
  77             asm("cli;hlt;");
  78             break;
  79     }
  80     if (phys < IMAGE2_AREA)
  81     {
  82         // first 4Gb is all mapped,
  83         // and do not expect source areas to cross 4Gb
  84         return (phys);
  85     }
  86     index = (virt >> I386_LPGSHIFT);
  87     virt += (uintptr_t)(phys & I386_LPGMASK);
  88     phys  = ((phys & ~((uint64_t)I386_LPGMASK)) | INTEL_PTE_PS  | INTEL_PTE_VALID | INTEL_PTE_WRITE);
  89     if (phys == BootPTD[index]) return (virt);
  90     BootPTD[index] = phys;
  91     invlpg(virt);
  92     BootPTD[index + 1] = (phys + I386_LPGBYTES);
  93     invlpg(virt + I386_LPGBYTES);
  94
  95     return (virt);
  96 }
  97
  98 void hibernateRestorePALState(uint32_t *arg)
  99 {
 100     (void)arg;
 101 }
 102
 103 void
 104 pal_hib_patchup(void)
 105 {
 106 }