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         uint32_t idx;
  47
  48         if (src == 0)
  49                 return (uintptr_t)dst;
  50
  51         d = (uint64_t *)pal_hib_map(DEST_COPY_AREA, dst);
  52         s = (uint64_t *) (uintptr_t)src;
  53
  54         for (idx = 0; idx < (len / (uint32_t)sizeof(uint64_t)); idx++)
  55                 d[idx] = s[idx];
  56
  57         return (uintptr_t)d;
  58 }
  59 #undef hibprintf
  60
  61 void hibprintf(const char *fmt, ...);
  62
  63 uintptr_t
  64 pal_hib_map(uintptr_t virt, uint64_t phys)
  65 {
  66     uintptr_t index;
  67
  68     switch (virt)
  69     {
  70         case DEST_COPY_AREA:
  71         case SRC_COPY_AREA:
  72         case COPY_PAGE_AREA:
  73         case BITMAP_AREA:
  74         case IMAGE_AREA:
  75         case IMAGE2_AREA:
  76             break;
  77         default:
  78             asm("cli;hlt;");
  79             break;
  80     }
  81
  82     index = (virt >> I386_LPGSHIFT);
  83     virt += (uintptr_t)(phys & I386_LPGMASK);
  84     phys  = ((phys & ~((uint64_t)I386_LPGMASK)) | INTEL_PTE_PS  | INTEL_PTE_VALID | INTEL_PTE_WRITE);
  85     BootPTD[index] = phys;
  86     invlpg(virt);
  87     BootPTD[index + 1] = (phys + I386_LPGBYTES);
  88     invlpg(virt + I386_LPGBYTES);
  89
  90     return (virt);
  91 }
  92
  93 void hibernateRestorePALState(uint32_t *arg)
  94 {
  95     (void)arg;
  96 }
  97
  98 void
  99 pal_hib_patchup(void)
 100 {
 101 }