2N/A/*
2N/A * GRUB -- GRand Unified Bootloader
2N/A * Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc.
2N/A *
2N/A * GRUB is free software: you can redistribute it and/or modify
2N/A * it under the terms of the GNU General Public License as published by
2N/A * the Free Software Foundation, either version 3 of the License, or
2N/A * (at your option) any later version.
2N/A *
2N/A * GRUB is distributed in the hope that it will be useful,
2N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
2N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2N/A * GNU General Public License for more details.
2N/A *
2N/A * You should have received a copy of the GNU General Public License
2N/A * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
2N/A */
2N/A
2N/A#include <grub/kernel.h>
2N/A#include <grub/mm.h>
2N/A#include <grub/machine/boot.h>
2N/A#include <grub/i386/floppy.h>
2N/A#include <grub/machine/memory.h>
2N/A#include <grub/machine/console.h>
2N/A#include <grub/machine/kernel.h>
2N/A#include <grub/machine/int.h>
2N/A#include <grub/types.h>
2N/A#include <grub/err.h>
2N/A#include <grub/dl.h>
2N/A#include <grub/misc.h>
2N/A#include <grub/loader.h>
2N/A#include <grub/env.h>
2N/A#include <grub/cache.h>
2N/A#include <grub/time.h>
2N/A#include <grub/cpu/tsc.h>
2N/A
2N/Astruct mem_region
2N/A{
2N/A grub_addr_t addr;
2N/A grub_size_t size;
2N/A};
2N/A
2N/A#define MAX_REGIONS 32
2N/A
2N/Astatic struct mem_region mem_regions[MAX_REGIONS];
2N/Astatic int num_regions;
2N/A
2N/Avoid (*grub_pc_net_config) (char **device, char **path);
2N/A
2N/A/*
2N/A * return the real time in ticks, of which there are about
2N/A * 18-20 per second
2N/A */
2N/Agrub_uint32_t
2N/Agrub_get_rtc (void)
2N/A{
2N/A struct grub_bios_int_registers regs;
2N/A
2N/A regs.eax = 0;
2N/A regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
2N/A grub_bios_interrupt (0x1a, &regs);
2N/A
2N/A return (regs.ecx << 16) | (regs.edx & 0xffff);
2N/A}
2N/A
2N/Avoid
2N/Agrub_machine_get_bootlocation (char **device, char **path)
2N/A{
2N/A char *ptr;
2N/A grub_uint8_t boot_drive, dos_part, bsd_part;
2N/A
2N/A boot_drive = (grub_boot_device >> 24);
2N/A dos_part = (grub_boot_device >> 16);
2N/A bsd_part = (grub_boot_device >> 8);
2N/A
2N/A /* No hardcoded root partition - make it from the boot drive and the
2N/A partition number encoded at the install time. */
2N/A if (boot_drive == GRUB_BOOT_MACHINE_PXE_DL)
2N/A {
2N/A if (grub_pc_net_config)
2N/A grub_pc_net_config (device, path);
2N/A return;
2N/A }
2N/A
2N/A /* XXX: This should be enough. */
2N/A#define DEV_SIZE 100
2N/A *device = grub_malloc (DEV_SIZE);
2N/A ptr = *device;
2N/A grub_snprintf (*device, DEV_SIZE,
2N/A "%cd%u", (boot_drive & 0x80) ? 'h' : 'f',
2N/A boot_drive & 0x7f);
2N/A ptr += grub_strlen (ptr);
2N/A
2N/A if (dos_part != 0xff)
2N/A grub_snprintf (ptr, DEV_SIZE - (ptr - *device),
2N/A ",%u", dos_part + 1);
2N/A ptr += grub_strlen (ptr);
2N/A
2N/A if (bsd_part != 0xff)
2N/A grub_snprintf (ptr, DEV_SIZE - (ptr - *device), ",%u",
2N/A bsd_part + 1);
2N/A ptr += grub_strlen (ptr);
2N/A *ptr = 0;
2N/A}
2N/A
2N/A/* Add a memory region. */
2N/Astatic void
2N/Aadd_mem_region (grub_addr_t addr, grub_size_t size)
2N/A{
2N/A if (num_regions == MAX_REGIONS)
2N/A /* Ignore. */
2N/A return;
2N/A
2N/A mem_regions[num_regions].addr = addr;
2N/A mem_regions[num_regions].size = size;
2N/A num_regions++;
2N/A}
2N/A
2N/A/* Compact memory regions. */
2N/Astatic void
2N/Acompact_mem_regions (void)
2N/A{
2N/A int i, j;
2N/A
2N/A /* Sort them. */
2N/A for (i = 0; i < num_regions - 1; i++)
2N/A for (j = i + 1; j < num_regions; j++)
2N/A if (mem_regions[i].addr > mem_regions[j].addr)
2N/A {
2N/A struct mem_region tmp = mem_regions[i];
2N/A mem_regions[i] = mem_regions[j];
2N/A mem_regions[j] = tmp;
2N/A }
2N/A
2N/A /* Merge overlaps. */
2N/A for (i = 0; i < num_regions - 1; i++)
2N/A if (mem_regions[i].addr + mem_regions[i].size >= mem_regions[i + 1].addr)
2N/A {
2N/A j = i + 1;
2N/A
2N/A if (mem_regions[i].addr + mem_regions[i].size
2N/A < mem_regions[j].addr + mem_regions[j].size)
2N/A mem_regions[i].size = (mem_regions[j].addr + mem_regions[j].size
2N/A - mem_regions[i].addr);
2N/A
2N/A grub_memmove (mem_regions + j, mem_regions + j + 1,
2N/A (num_regions - j - 1) * sizeof (struct mem_region));
2N/A i--;
2N/A num_regions--;
2N/A }
2N/A}
2N/A
2N/Agrub_addr_t grub_modbase;
2N/Aextern grub_uint8_t _start[], _edata[];
2N/A
2N/Avoid
2N/Agrub_machine_init (void)
2N/A{
2N/A int i;
2N/A#if 0
2N/A int grub_lower_mem;
2N/A#endif
2N/A
2N/A grub_modbase = GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR + (_edata - _start);
2N/A
2N/A /* Initialize the console as early as possible. */
2N/A grub_console_init ();
2N/A
2N/A /* This sanity check is useless since top of GRUB_MEMORY_MACHINE_RESERVED_END
2N/A is used for stack and if it's unavailable we wouldn't have gotten so far.
2N/A */
2N/A#if 0
2N/A grub_lower_mem = grub_get_conv_memsize () << 10;
2N/A
2N/A /* Sanity check. */
2N/A if (grub_lower_mem < GRUB_MEMORY_MACHINE_RESERVED_END)
2N/A grub_fatal ("too small memory");
2N/A#endif
2N/A
2N/A/* FIXME: This prevents loader/i386/linux.c from using low memory. When our
2N/A heap implements support for requesting a chunk in low memory, this should
2N/A no longer be a problem. */
2N/A#if 0
2N/A /* Add the lower memory into free memory. */
2N/A if (grub_lower_mem >= GRUB_MEMORY_MACHINE_RESERVED_END)
2N/A add_mem_region (GRUB_MEMORY_MACHINE_RESERVED_END,
2N/A grub_lower_mem - GRUB_MEMORY_MACHINE_RESERVED_END);
2N/A#endif
2N/A
2N/A auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t,
2N/A grub_memory_type_t);
2N/A int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size,
2N/A grub_memory_type_t type)
2N/A {
2N/A /* Avoid the lower memory. */
2N/A if (addr < 0x100000)
2N/A {
2N/A if (size <= 0x100000 - addr)
2N/A return 0;
2N/A
2N/A size -= 0x100000 - addr;
2N/A addr = 0x100000;
2N/A }
2N/A
2N/A /* Ignore >4GB. */
2N/A if (addr <= 0xFFFFFFFF && type == GRUB_MEMORY_AVAILABLE)
2N/A {
2N/A grub_size_t len;
2N/A
2N/A len = (grub_size_t) ((addr + size > 0xFFFFFFFF)
2N/A ? 0xFFFFFFFF - addr
2N/A : size);
2N/A add_mem_region (addr, len);
2N/A }
2N/A
2N/A return 0;
2N/A }
2N/A
2N/A grub_machine_mmap_iterate (hook);
2N/A
2N/A compact_mem_regions ();
2N/A
2N/A for (i = 0; i < num_regions; i++)
2N/A grub_mm_init_region ((void *) mem_regions[i].addr, mem_regions[i].size);
2N/A
2N/A grub_tsc_init ();
2N/A}
2N/A
2N/Avoid
2N/Agrub_machine_fini (void)
2N/A{
2N/A grub_console_fini ();
2N/A grub_stop_floppy ();
2N/A}