| /* |
| * 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, void *hook_data) |
| { |
| grub_ieee1275_phandle_t root; |
| grub_ieee1275_phandle_t memory; |
| grub_uint32_t available[128]; |
| 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 (available_size < 0 || (grub_size_t) available_size > sizeof (available)) |
| return grub_error (GRUB_ERR_UNKNOWN_DEVICE, |
| "/memory response buffer exceeded"); |
| |
| 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, hook_data)) |
| break; |
| } |
| |
| return grub_errno; |
| } |