128 lines
4.2 KiB
C
128 lines
4.2 KiB
C
/* Prepare efiemu. E.g. allocate memory, load the runtime
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to appropriate place, etc */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/err.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/efiemu/efiemu.h>
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#include <grub/lib/crc.h>
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grub_err_t
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SUFFIX (grub_efiemu_prepare) (struct grub_efiemu_prepare_hook *prepare_hooks,
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struct grub_efiemu_configuration_table
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*config_tables)
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{
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grub_err_t err;
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int conftable_handle;
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struct grub_efiemu_configuration_table *cur;
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struct grub_efiemu_prepare_hook *curhook;
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int cntconftables = 0;
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TYPE (grub_efiemu_configuration_table) *conftables = 0;
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TYPE (grub_efiemu_runtime_services) *runtime_services;
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int i;
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int handle;
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grub_off_t off;
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grub_dprintf ("efiemu", "Preparing EfiEmu\n");
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/* Request space for the list of configuration tables */
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for (cur = config_tables; cur; cur = cur->next)
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cntconftables++;
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conftable_handle
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= grub_efiemu_request_memalign (GRUB_EFIEMU_PAGESIZE,
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cntconftables * sizeof (*conftables),
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GRUB_EFI_RUNTIME_SERVICES_DATA);
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/* Switch from phase 1 (counting) to phase 2 (real job) */
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grub_efiemu_alloc_syms ();
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grub_efiemu_mm_do_alloc ();
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grub_efiemu_system_table32 = 0;
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grub_efiemu_system_table64 = 0;
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/* Execute hooks */
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for (curhook = prepare_hooks; curhook; curhook = curhook->next)
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curhook->hook (curhook->data);
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/* Move runtime to its due place */
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if ((err = grub_efiemu_loadcore_load ()))
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{
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grub_efiemu_unload ();
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return err;
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}
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if ((err = grub_efiemu_resolve_symbol ("efiemu_system_table",
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&handle, &off)))
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{
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grub_efiemu_unload ();
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return err;
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}
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SUFFIX (grub_efiemu_system_table)
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= (TYPE (grub_efi_system_table) *)
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((grub_uint8_t *)grub_efiemu_mm_obtain_request (handle) + off);
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/* compute CRC32 of runtime_services */
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if ((err = grub_efiemu_resolve_symbol ("efiemu_runtime_services",
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&handle, &off)))
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return err;
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runtime_services = (TYPE (grub_efiemu_runtime_services) *)
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((grub_uint8_t *)grub_efiemu_mm_obtain_request (handle) + off);
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runtime_services->hdr.crc32 = 0;
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runtime_services->hdr.crc32 = grub_getcrc32
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(0, runtime_services, runtime_services->hdr.header_size);
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/* Put pointer to the list of configuration tables in system table */
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grub_efiemu_write_value
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(&(SUFFIX (grub_efiemu_system_table)->configuration_table), 0,
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conftable_handle, 0, 1,
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sizeof (SUFFIX (grub_efiemu_system_table)->configuration_table));
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SUFFIX(grub_efiemu_system_table)->num_table_entries = cntconftables;
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/* Fill the list of configuration tables */
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conftables = (TYPE (grub_efiemu_configuration_table) *)
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grub_efiemu_mm_obtain_request (conftable_handle);
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i = 0;
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for (cur = config_tables; cur; cur = cur->next, i++)
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{
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grub_memcpy (&(conftables[i].vendor_guid), &(cur->guid),
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sizeof (cur->guid));
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if (cur->get_table)
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conftables[i].vendor_table
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= PTR_TO_UINT64 (cur->get_table (cur->data));
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else
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conftables[i].vendor_table = PTR_TO_UINT64 (cur->data);
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}
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/* compute CRC32 of system table */
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SUFFIX (grub_efiemu_system_table)->hdr.crc32 = 0;
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SUFFIX (grub_efiemu_system_table)->hdr.crc32
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= grub_getcrc32 (0, SUFFIX (grub_efiemu_system_table),
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SUFFIX (grub_efiemu_system_table)->hdr.header_size);
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grub_dprintf ("efiemu","system_table = %p, runtime_services = %p,"
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" conftables = %p (%d entries)\n",
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SUFFIX (grub_efiemu_system_table), runtime_services,
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conftables, cntconftables);
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return GRUB_ERR_NONE;
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}
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