From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:51 +0200 Subject: Adding upstream version 2.06. Signed-off-by: Daniel Baumann --- grub-core/kern/ieee1275/mmap.c | 83 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 grub-core/kern/ieee1275/mmap.c (limited to 'grub-core/kern/ieee1275/mmap.c') diff --git a/grub-core/kern/ieee1275/mmap.c b/grub-core/kern/ieee1275/mmap.c new file mode 100644 index 0000000..bf325ea --- /dev/null +++ b/grub-core/kern/ieee1275/mmap.c @@ -0,0 +1,83 @@ +/* + * 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 . + */ + +#include +#include +#include + +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; +} -- cgit v1.2.3