5ebc275d6f
* conf/x86_64-efi.rmk (kernel_mod_SOURCES): Add kern/time.c, kern/i386/tsc.c and kern/i386/pit.c. * include/grub/i386/tsc.h (grub_cpu_is_cpuid_supported): Handle x86_64 platform. * kern/i386/efi/init.c: Replace <grub/cpu/tsc.h> with <grub/i386/tsc.h>. * kern/i386/pit.c: Replace <grub/cpu/io.h> with <grub/i386/io.h>.
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 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/types.h>
|
|
#include <grub/i386/io.h>
|
|
#include <grub/i386/pit.h>
|
|
|
|
#define TIMER2_REG_CONTROL 0x42
|
|
#define TIMER_REG_COMMAND 0x43
|
|
#define TIMER2_REG_LATCH 0x61
|
|
|
|
#define TIMER2_SELECT 0x80
|
|
#define TIMER_ENABLE_LSB 0x20
|
|
#define TIMER_ENABLE_MSB 0x10
|
|
#define TIMER2_LATCH 0x20
|
|
|
|
void
|
|
grub_pit_wait (grub_uint16_t tics)
|
|
{
|
|
grub_outb (TIMER2_SELECT | TIMER_ENABLE_LSB | TIMER_ENABLE_MSB, TIMER_REG_COMMAND);
|
|
grub_outb (tics & 0xff, TIMER2_REG_CONTROL);
|
|
grub_outb (tics >> 8, TIMER2_REG_CONTROL);
|
|
|
|
while ((grub_inb (TIMER2_REG_LATCH) & TIMER2_LATCH) == 0x00);
|
|
}
|