blob: 2e4e085bb19e79aa63c14c039a551a1f16fed15e [file] [log] [blame]
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2003,2004,2005,2007,2008 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/memory.h>
#include <grub/ieee1275/ieee1275.h>
#include <grub/types.h>
grub_err_t
grub_machine_mmap_iterate (grub_memory_hook_t hook)
{
grub_ieee1275_phandle_t root;
grub_ieee1275_phandle_t memory;
grub_uint32_t available[32];
grub_ssize_t available_size;
grub_uint32_t address_cells = 1;
grub_uint32_t size_cells = 1;
int i;
/* Determine the format of each entry in `available'. */
grub_ieee1275_finddevice ("/", &root);
grub_ieee1275_get_integer_property (root, "#address-cells", &address_cells,
sizeof address_cells, 0);
grub_ieee1275_get_integer_property (root, "#size-cells", &size_cells,
sizeof size_cells, 0);
if (size_cells > address_cells)
address_cells = size_cells;
/* Load `/memory/available'. */
if (grub_ieee1275_finddevice ("/memory", &memory))
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
"couldn't find /memory node");
if (grub_ieee1275_get_integer_property (memory, "available", available,
sizeof available, &available_size))
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
"couldn't examine /memory/available property");
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_BROKEN_ADDRESS_CELLS))
{
address_cells = 1;
size_cells = 1;
}
/* Decode each entry and call `hook'. */
i = 0;
available_size /= sizeof (grub_uint32_t);
while (i < available_size)
{
grub_uint64_t address;
grub_uint64_t size;
address = available[i++];
if (address_cells == 2)
address = (address << 32) | available[i++];
size = available[i++];
if (size_cells == 2)
size = (size << 32) | available[i++];
if (hook (address, size, GRUB_MEMORY_AVAILABLE))
break;
}
return grub_errno;
}