64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* init.c - initialize an arm-based EFI system */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2013 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/env.h>
|
|
#include <grub/kernel.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/mm.h>
|
|
#include <grub/time.h>
|
|
#include <grub/efi/efi.h>
|
|
#include <grub/loader.h>
|
|
|
|
static grub_uint64_t timer_frequency_in_khz;
|
|
|
|
static grub_uint64_t
|
|
grub_efi_get_time_ms (void)
|
|
{
|
|
grub_uint64_t tmr;
|
|
asm volatile("mrs %0, cntvct_el0" : "=r" (tmr));
|
|
|
|
return tmr / timer_frequency_in_khz;
|
|
}
|
|
|
|
|
|
void
|
|
grub_machine_init (void)
|
|
{
|
|
grub_uint64_t timer_frequency;
|
|
|
|
grub_efi_init ();
|
|
|
|
asm volatile("mrs %0, cntfrq_el0" : "=r" (timer_frequency));
|
|
timer_frequency_in_khz = timer_frequency / 1000;
|
|
|
|
grub_install_get_time_ms (grub_efi_get_time_ms);
|
|
}
|
|
|
|
void
|
|
grub_machine_fini (int flags)
|
|
{
|
|
if (!(flags & GRUB_LOADER_FLAG_NORETURN))
|
|
return;
|
|
|
|
grub_efi_fini ();
|
|
|
|
if (!(flags & GRUB_LOADER_FLAG_EFI_KEEP_ALLOCATED_MEMORY))
|
|
grub_efi_memory_fini ();
|
|
}
|