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efi: Move fdt helper into own file 

We only support FDT files with EFI on arm and arm64 systems, not
on x86. So move the helper that finds a prepopulated FDT UUID
into its own file and only build it for architectures where it
also gets called.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Alexander Graf 2016-11-21 16:23:02 +01:00 committed by Daniel Kiper
parent c9a8d037a8
commit 0d2345774d
4 changed files with 47 additions and 22 deletions
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2
grub-core/Makefile.core.def
View File

@ -212,8 +212,10 @@ kernel = {
arm_efi = kern/arm/efi/init.c;
arm_efi = kern/arm/efi/misc.c;
arm_efi = kern/efi/fdt.c;
arm64_efi = kern/arm64/efi/init.c;
arm64_efi = kern/efi/fdt.c;
i386_pc = kern/i386/pc/init.c;
i386_pc = kern/i386/pc/mmap.c;

43
grub-core/kern/efi/fdt.c Normal file
View File

@ -0,0 +1,43 @@
/* fdt.c - EFI Flattened Device Tree interaction */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2006,2007 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/efi/efi.h>
#include <grub/mm.h>
void *
grub_efi_get_firmware_fdt (void)
{
grub_efi_configuration_table_t *tables;
grub_efi_guid_t fdt_guid = GRUB_EFI_DEVICE_TREE_GUID;
void *firmware_fdt = NULL;
unsigned int i;
/* Look for FDT in UEFI config tables. */
tables = grub_efi_system_table->configuration_table;
for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
if (grub_memcmp (&tables[i].vendor_guid, &fdt_guid, sizeof (fdt_guid)) == 0)
{
firmware_fdt = tables[i].vendor_table;
grub_dprintf ("linux", "found registered FDT @ %p\n", firmware_fdt);
break;
}
return firmware_fdt;
}

22
grub-core/kern/efi/init.c
View File

@ -72,28 +72,6 @@ grub_machine_get_bootlocation (char **device, char **path)
}
}
void *
grub_efi_get_firmware_fdt (void)
{
grub_efi_configuration_table_t *tables;
grub_efi_guid_t fdt_guid = GRUB_EFI_DEVICE_TREE_GUID;
void *firmware_fdt = NULL;
unsigned int i;
/* Look for FDT in UEFI config tables. */
tables = grub_efi_system_table->configuration_table;
for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
if (grub_memcmp (&tables[i].vendor_guid, &fdt_guid, sizeof (fdt_guid)) == 0)
{
firmware_fdt = tables[i].vendor_table;
grub_dprintf ("linux", "found registered FDT @ %p\n", firmware_fdt);
break;
}
return firmware_fdt;
}
void
grub_efi_fini (void)
{

2
include/grub/efi/efi.h
View File

@ -81,7 +81,9 @@ extern void (*EXPORT_VAR(grub_efi_net_config)) (grub_efi_handle_t hnd,
char **device,
char **path);
#if defined(__arm__) || defined(__aarch64__)
void *EXPORT_FUNC(grub_efi_get_firmware_fdt)(void);
#endif
grub_addr_t grub_efi_modules_addr (void);