/* * 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[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, hook_data)) break; } return grub_errno; }