arch/all-pc/boot/grub2-aros/grub-core/lib/ieee1275/relocator.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2010  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/relocator.h>
  20 #include <grub/relocator_private.h>
  21 #include <grub/memory.h>
  22 #include <grub/ieee1275/ieee1275.h>
  23
  24 unsigned
  25 grub_relocator_firmware_get_max_events (void)
  26 {
  27   int counter = 0;
  28   auto int NESTED_FUNC_ATTR count (grub_uint64_t addr __attribute__ ((unused)),
  29                                    grub_uint64_t len __attribute__ ((unused)),
  30                                    grub_memory_type_t type __attribute__ ((unused)));
  31   int NESTED_FUNC_ATTR count (grub_uint64_t addr __attribute__ ((unused)),
  32                               grub_uint64_t len __attribute__ ((unused)),
  33                               grub_memory_type_t type __attribute__ ((unused)))
  34   {
  35     counter++;
  36     return 0;
  37   }
  38
  39   if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_CANNOT_INTERPRET))
  40     return 0;
  41   grub_machine_mmap_iterate (count);
  42   return 2 * counter;
  43 }
  44
  45 unsigned
  46 grub_relocator_firmware_fill_events (struct grub_relocator_mmap_event *events)
  47 {
  48   int counter = 0;
  49   auto int NESTED_FUNC_ATTR fill (grub_uint64_t addr, grub_uint64_t len,
  50                                   grub_memory_type_t type);
  51   int NESTED_FUNC_ATTR fill (grub_uint64_t addr, grub_uint64_t len,
  52                              grub_memory_type_t type)
  53   {
  54     if (type != GRUB_MEMORY_AVAILABLE)
  55       return 0;
  56
  57     if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_PRE1_5M_CLAIM))
  58       {
  59         if (addr + len <= 0x180000)
  60           return 0;
  61
  62         if (addr < 0x180000)
  63           {
  64             len = addr + len - 0x180000;
  65             addr = 0x180000;
  66           }
  67       }
  68
  69     events[counter].type = REG_FIRMWARE_START;
  70     events[counter].pos = addr;
  71     counter++;
  72     events[counter].type = REG_FIRMWARE_END;
  73     events[counter].pos = addr + len;
  74     counter++;
  75
  76     return 0;
  77   }
  78
  79   if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_CANNOT_INTERPRET))
  80     return 0;
  81   grub_machine_mmap_iterate (fill);
  82   return counter;
  83 }
  84
  85 int
  86 grub_relocator_firmware_alloc_region (grub_addr_t start, grub_size_t size)
  87 {
  88   grub_err_t err;
  89   err = grub_claimmap (start, size);
  90   grub_errno = 0;
  91   return (err == 0);
  92 }
  93
  94 void
  95 grub_relocator_firmware_free_region (grub_addr_t start, grub_size_t size)
  96 {
  97   grub_ieee1275_release (start, size);
  98 }