187 lines
4.2 KiB
C
187 lines
4.2 KiB
C
|
/*
|
||
|
* GRUB -- GRand Unified Bootloader
|
||
|
* Copyright (C) 2002,2003,2004,2005,2006,2007 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/kernel.h>
|
||
|
#include <grub/mm.h>
|
||
|
#include <grub/machine/time.h>
|
||
|
#include <grub/machine/init.h>
|
||
|
#include <grub/machine/memory.h>
|
||
|
#include <grub/machine/console.h>
|
||
|
#include <grub/machine/kernel.h>
|
||
|
#include <grub/types.h>
|
||
|
#include <grub/err.h>
|
||
|
#include <grub/dl.h>
|
||
|
#include <grub/misc.h>
|
||
|
#include <grub/loader.h>
|
||
|
#include <grub/env.h>
|
||
|
#include <grub/cache.h>
|
||
|
#include <grub/time.h>
|
||
|
#include <grub/symbol.h>
|
||
|
#include <grub/cpu/io.h>
|
||
|
|
||
|
#define GRUB_FLOPPY_REG_DIGITAL_OUTPUT 0x3f2
|
||
|
|
||
|
extern char _start[];
|
||
|
extern char _end[];
|
||
|
|
||
|
grub_addr_t grub_os_area_addr;
|
||
|
grub_size_t grub_os_area_size;
|
||
|
grub_size_t grub_lower_mem, grub_upper_mem;
|
||
|
|
||
|
/* FIXME: we need interrupts to do this right */
|
||
|
static grub_uint32_t grub_time_tics = 0;
|
||
|
|
||
|
grub_uint32_t
|
||
|
grub_get_rtc (void)
|
||
|
{
|
||
|
return grub_time_tics;
|
||
|
}
|
||
|
|
||
|
/* Stop the floppy drive from spinning, so that other software is
|
||
|
jumped to with a known state. */
|
||
|
void
|
||
|
grub_stop_floppy (void)
|
||
|
{
|
||
|
grub_outb (0, GRUB_FLOPPY_REG_DIGITAL_OUTPUT);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
grub_millisleep (grub_uint32_t ms __attribute__ ((unused)))
|
||
|
{
|
||
|
}
|
||
|
|
||
|
void
|
||
|
grub_exit ()
|
||
|
{
|
||
|
grub_printf ("grub_exit() is not implemented.\n");
|
||
|
grub_stop ();
|
||
|
}
|
||
|
|
||
|
void
|
||
|
grub_reboot ()
|
||
|
{
|
||
|
grub_printf ("grub_reboot() is not implemented.\n");
|
||
|
grub_stop ();
|
||
|
}
|
||
|
|
||
|
void
|
||
|
grub_halt (int no_apm __attribute__ ((unused)))
|
||
|
{
|
||
|
grub_printf ("grub_halt() is not implemented.\n");
|
||
|
grub_stop ();
|
||
|
}
|
||
|
|
||
|
void
|
||
|
grub_arch_sync_caches (void *address __attribute__ ((unused)),
|
||
|
grub_size_t len __attribute__ ((unused)))
|
||
|
{
|
||
|
}
|
||
|
|
||
|
static char *
|
||
|
make_install_device (void)
|
||
|
{
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
grub_machine_init (void)
|
||
|
{
|
||
|
/* Initialize the console as early as possible. */
|
||
|
grub_console_init ();
|
||
|
|
||
|
grub_lower_mem = GRUB_MEMORY_MACHINE_LOWER_USABLE;
|
||
|
grub_upper_mem = 0;
|
||
|
|
||
|
auto int heap_init (mem_region_t);
|
||
|
int heap_init (mem_region_t mem_region)
|
||
|
{
|
||
|
grub_uint64_t addr = mem_region->addr;
|
||
|
grub_uint64_t size = mem_region->size;
|
||
|
|
||
|
#if GRUB_CPU_SIZEOF_VOID_P == 4
|
||
|
/* Restrict ourselves to 32-bit memory space. */
|
||
|
if (addr > ULONG_MAX)
|
||
|
{
|
||
|
grub_upper_mem = ULONG_MAX;
|
||
|
return 0;
|
||
|
}
|
||
|
if (addr + size > ULONG_MAX)
|
||
|
size = ULONG_MAX - addr;
|
||
|
#endif
|
||
|
|
||
|
grub_upper_mem = grub_max (grub_upper_mem, addr + size);
|
||
|
|
||
|
if (mem_region->type != GRUB_LINUXBIOS_MEMORY_AVAILABLE)
|
||
|
return 0;
|
||
|
|
||
|
/* Avoid the lower memory. */
|
||
|
if (addr < GRUB_MEMORY_MACHINE_LOWER_SIZE)
|
||
|
{
|
||
|
if (addr + size <= GRUB_MEMORY_MACHINE_LOWER_SIZE)
|
||
|
return 0;
|
||
|
else
|
||
|
{
|
||
|
size -= GRUB_MEMORY_MACHINE_LOWER_SIZE - addr;
|
||
|
addr = GRUB_MEMORY_MACHINE_LOWER_SIZE;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (addr == GRUB_MEMORY_MACHINE_UPPER_START
|
||
|
|| (addr >= GRUB_MEMORY_MACHINE_LOWER_SIZE
|
||
|
&& addr <= GRUB_MEMORY_MACHINE_UPPER_START
|
||
|
&& (addr + size > GRUB_MEMORY_MACHINE_UPPER_START)))
|
||
|
{
|
||
|
grub_size_t quarter = size >> 2;
|
||
|
|
||
|
grub_os_area_addr = addr;
|
||
|
grub_os_area_size = size - quarter;
|
||
|
grub_mm_init_region ((void *) (grub_os_area_addr + grub_os_area_size),
|
||
|
quarter);
|
||
|
}
|
||
|
else
|
||
|
grub_mm_init_region ((void *) addr, (grub_size_t) size);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
grub_available_iterate (heap_init);
|
||
|
|
||
|
/* This variable indicates size, not offset. */
|
||
|
grub_upper_mem -= GRUB_MEMORY_MACHINE_UPPER_START;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
grub_machine_set_prefix (void)
|
||
|
{
|
||
|
/* Initialize the prefix. */
|
||
|
grub_env_set ("prefix", make_install_device ());
|
||
|
}
|
||
|
|
||
|
void
|
||
|
grub_machine_fini (void)
|
||
|
{
|
||
|
grub_console_fini ();
|
||
|
}
|
||
|
|
||
|
/* Return the end of the core image. */
|
||
|
grub_addr_t
|
||
|
grub_arch_modules_addr (void)
|
||
|
{
|
||
|
return ALIGN_UP(_end, GRUB_MOD_ALIGN);
|
||
|
}
|