3611c4f42e
In order to maintain the coding style consistency, it was requested to replace the methods that use "__asm__ __volatile__" with "asm volatile". Signed-off-by: Jesús Diéguez Fernández <jesusdf@gmail.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
82 lines
2.2 KiB
C
82 lines
2.2 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/cpu/io.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/acpi.h>
|
|
#include <grub/i18n.h>
|
|
#include <grub/pci.h>
|
|
#include <grub/mm.h>
|
|
|
|
const char bochs_shutdown[] = "Shutdown";
|
|
|
|
/*
|
|
* This call is special... it never returns... in fact it should simply
|
|
* hang at this point!
|
|
*/
|
|
static inline void __attribute__ ((noreturn))
|
|
stop (void)
|
|
{
|
|
asm volatile ("cli");
|
|
while (1)
|
|
{
|
|
asm volatile ("hlt");
|
|
}
|
|
}
|
|
|
|
static int
|
|
grub_shutdown_pci_iter (grub_pci_device_t dev, grub_pci_id_t pciid,
|
|
void *data __attribute__ ((unused)))
|
|
{
|
|
/* QEMU. */
|
|
if (pciid == 0x71138086)
|
|
{
|
|
grub_pci_address_t addr;
|
|
addr = grub_pci_make_address (dev, 0x40);
|
|
grub_pci_write (addr, 0x7001);
|
|
addr = grub_pci_make_address (dev, 0x80);
|
|
grub_pci_write (addr, grub_pci_read (addr) | 1);
|
|
grub_outw (0x2000, 0x7004);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
grub_halt (void)
|
|
{
|
|
unsigned int i;
|
|
|
|
#if defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_MULTIBOOT)
|
|
grub_acpi_halt ();
|
|
#endif
|
|
|
|
/* Disable interrupts. */
|
|
asm volatile ("cli");
|
|
|
|
/* Bochs, QEMU, etc. Removed in newer QEMU releases. */
|
|
for (i = 0; i < sizeof (bochs_shutdown) - 1; i++)
|
|
grub_outb (bochs_shutdown[i], 0x8900);
|
|
|
|
grub_pci_iterate (grub_shutdown_pci_iter, NULL);
|
|
|
|
grub_puts_ (N_("GRUB doesn't know how to halt this machine yet!"));
|
|
|
|
/* In order to return we'd have to check what the previous status of IF
|
|
flag was. But user most likely doesn't want to return anyway ... */
|
|
stop ();
|
|
}
|