/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 2009,2010  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/kernel.h>
#include <grub/misc.h>
#include <grub/env.h>
#include <grub/time.h>
#include <grub/types.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/time.h>
#include <grub/machine/kernel.h>
#include <grub/machine/memory.h>
#include <grub/cpu/kernel.h>

extern void grub_video_sm712_init (void);
extern void grub_video_init (void);
extern void grub_bitmap_init (void);
extern void grub_font_init (void);
extern void grub_gfxterm_init (void);
extern void grub_at_keyboard_init (void);

/* FIXME: use interrupt to count high.  */
grub_uint64_t
grub_get_rtc (void)
{
  static grub_uint32_t high = 0;
  static grub_uint32_t last = 0;
  grub_uint32_t low;

  asm volatile ("mfc0 %0, $9": "=r" (low));
  if (low < last)
    high++;
  last = low;

  return (((grub_uint64_t) high) << 32) | low;
}

grub_err_t
grub_machine_mmap_iterate (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t,
							 grub_uint64_t,
							 grub_uint32_t))
{
  hook (GRUB_ARCH_LOWMEMPSTART, grub_arch_memsize << 20,
	GRUB_MACHINE_MEMORY_AVAILABLE);
  hook (GRUB_ARCH_HIGHMEMPSTART, grub_arch_highmemsize << 20,
	GRUB_MACHINE_MEMORY_AVAILABLE);
  return GRUB_ERR_NONE;
}


static void *
get_modules_end (void)
{
  struct grub_module_info *modinfo;
  struct grub_module_header *header;
  grub_addr_t modbase;

  modbase = grub_arch_modules_addr ();
  modinfo = (struct grub_module_info *) modbase;

  /* Check if there are any modules.  */
  if ((modinfo == 0) || modinfo->magic != GRUB_MODULE_MAGIC)
    return modinfo;

  for (header = (struct grub_module_header *) (modbase + modinfo->offset);
       header < (struct grub_module_header *) (modbase + modinfo->size);
       header = (struct grub_module_header *) ((char *) header + header->size));

  return header;
}

void
grub_machine_init (void)
{
  void *modend;
  modend = get_modules_end ();
  grub_mm_init_region (modend, (grub_arch_memsize << 20)
		       - (((grub_addr_t) modend) - GRUB_ARCH_LOWMEMVSTART));
  /* FIXME: use upper memory as well.  */
  grub_install_get_time_ms (grub_rtc_get_time_ms);

  /* Initialize output terminal (can't be done earlier, as gfxterm
     relies on a working heap.  */
  grub_video_sm712_init ();
  grub_video_init ();
  grub_bitmap_init ();
  grub_font_init ();
  grub_gfxterm_init ();

  grub_at_keyboard_init ();
}

void
grub_machine_fini (void)
{
}

void
grub_exit (void)
{
  while (1);
}

void
grub_halt (void)
{
  while (1);
}

void
grub_reboot (void)
{
  while (1);
}