OpenSolaris_b135/grub/grub-0.97/stage2/common.c
/* common.c - miscellaneous shared variables and routines */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2004 Free Software Foundation, Inc.
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <shared.h>
#ifdef SUPPORT_NETBOOT
#include <grub.h>
#include <bootp.h>
#endif
/*
* Shared BIOS/boot data.
*/
struct multiboot_info mbi;
unsigned long saved_drive;
unsigned long saved_partition;
unsigned long cdrom_drive;
#ifndef STAGE1_5
#ifdef SOLARIS_NETBOOT
unsigned long dhcpack_length;
unsigned long dhcpack_buf;
#endif /* SOLARIS_NETBOOT */
unsigned long saved_mem_upper;
/* This saves the maximum size of extended memory (in KB). */
unsigned long extended_memory;
#endif
/*
* Error code stuff.
*/
grub_error_t errnum = ERR_NONE;
#ifndef STAGE1_5
char *err_list[] =
{
[ERR_NONE] = 0,
[ERR_BAD_ARGUMENT] = "Invalid argument",
[ERR_BAD_FILENAME] =
"Filename must be either an absolute pathname or blocklist",
[ERR_BAD_FILETYPE] = "Bad file or directory type",
[ERR_BAD_GZIP_DATA] = "Bad or corrupt data while decompressing file",
[ERR_BAD_GZIP_HEADER] = "Bad or incompatible header in compressed file",
[ERR_BAD_PART_TABLE] = "Partition table invalid or corrupt",
[ERR_BAD_VERSION] = "Mismatched or corrupt version of stage1/stage2",
[ERR_BELOW_1MB] = "Loading below 1MB is not supported",
[ERR_BOOT_COMMAND] = "Kernel must be loaded before booting",
[ERR_BOOT_FAILURE] = "Unknown boot failure",
[ERR_BOOT_FEATURES] = "Unsupported Multiboot features requested",
[ERR_DEV_FORMAT] = "Unrecognized device string",
[ERR_DEV_NEED_INIT] = "Device not initialized yet",
[ERR_DEV_VALUES] = "Invalid device requested",
[ERR_EXEC_FORMAT] = "Invalid or unsupported executable format",
[ERR_FILELENGTH] =
"Filesystem compatibility error, cannot read whole file",
[ERR_FILE_NOT_FOUND] = "File not found",
[ERR_FSYS_CORRUPT] = "Inconsistent filesystem structure",
[ERR_FSYS_MOUNT] = "Cannot mount selected partition",
[ERR_GEOM] = "Selected cylinder exceeds maximum supported by BIOS",
[ERR_NEED_LX_KERNEL] = "Linux kernel must be loaded before initrd",
[ERR_NEED_MB_KERNEL] = "Multiboot kernel must be loaded before modules",
[ERR_NO_DISK] = "Selected disk does not exist",
[ERR_NO_DISK_SPACE] = "No spare sectors on the disk",
[ERR_NO_PART] = "No such partition",
[ERR_NUMBER_OVERFLOW] = "Overflow while parsing number",
[ERR_NUMBER_PARSING] = "Error while parsing number",
[ERR_OUTSIDE_PART] = "Attempt to access block outside partition",
[ERR_PRIVILEGED] = "Must be authenticated",
[ERR_READ] = "Disk read error",
[ERR_SYMLINK_LOOP] = "Too many symbolic links",
[ERR_UNALIGNED] = "File is not sector aligned",
[ERR_UNRECOGNIZED] = "Unrecognized command",
[ERR_WONT_FIT] = "Selected item cannot fit into memory",
[ERR_WRITE] = "Disk write error",
[ERR_BAD_GZIP_CRC] = "Incorrect gunzip CRC checksum",
[ERR_FILESYSTEM_NOT_FOUND] = "File System not found",
/* this zfs file system is not found in the pool of the device */
[ERR_NO_BOOTPATH] = "No valid boot path found in the zfs label. This may be caused by attempting to boot from an off-lined device.",
[ERR_NEWER_VERSION] = "Newer on-disk pool version",
[ERR_NOTXPM] = "Image not in XPM graphics format",
[ERR_TOOMANYCOLORS] = "Image cannot use more than 14 colors",
[ERR_CORRUPTXPM] = "File contains corrupt XPM image data"
};
/* static for BIOS memory map fakery */
static struct AddrRangeDesc fakemap[3] =
{
{20, 0, 0, MB_ARD_MEMORY},
{20, 0x100000, 0, MB_ARD_MEMORY},
{20, 0x1000000, 0, MB_ARD_MEMORY}
};
/* A big problem is that the memory areas aren't guaranteed to be:
(1) contiguous, (2) sorted in ascending order, or (3) non-overlapping.
Thus this kludge. */
static unsigned long
mmap_avail_at (unsigned long bottom)
{
unsigned long long top;
unsigned long addr;
int cont;
top = bottom;
do
{
for (cont = 0, addr = mbi.mmap_addr;
addr < mbi.mmap_addr + mbi.mmap_length;
addr += *((unsigned long *) addr) + 4)
{
struct AddrRangeDesc *desc = (struct AddrRangeDesc *) addr;
if (desc->Type == MB_ARD_MEMORY
&& desc->BaseAddr <= top
&& desc->BaseAddr + desc->Length > top)
{
top = desc->BaseAddr + desc->Length;
cont++;
}
}
}
while (cont);
/* For now, GRUB assumes 32bits addresses, so... */
if (top > 0xFFFFFFFF)
top = 0xFFFFFFFF;
return (unsigned long) top - bottom;
}
#endif /* ! STAGE1_5 */
/* This queries for BIOS information. */
void
init_bios_info (void)
{
#ifndef STAGE1_5
unsigned long cont, memtmp, addr;
int drive;
#endif
/*
* Get information from BIOS on installed RAM.
*/
mbi.mem_lower = get_memsize (0);
mbi.mem_upper = get_memsize (1);
#ifndef STAGE1_5
/*
* We need to call this somewhere before trying to put data
* above 1 MB, since without calling it, address line 20 will be wired
* to 0. Not too desirable.
*/
gateA20 (1);
/* Store the size of extended memory in EXTENDED_MEMORY, in order to
tell it to non-Multiboot OSes. */
extended_memory = mbi.mem_upper;
/*
* The "mbi.mem_upper" variable only recognizes upper memory in the
* first memory region. If there are multiple memory regions,
* the rest are reported to a Multiboot-compliant OS, but otherwise
* unused by GRUB.
*/
addr = get_code_end ();
mbi.mmap_addr = addr;
mbi.mmap_length = 0;
cont = 0;
do
{
cont = get_mmap_entry ((void *) addr, cont);
/* If the returned buffer's length is zero, quit. */
if (! *((unsigned long *) addr))
break;
mbi.mmap_length += *((unsigned long *) addr) + 4;
addr += *((unsigned long *) addr) + 4;
}
while (cont);
if (mbi.mmap_length)
{
unsigned long long max_addr;
/*
* This is to get the lower memory, and upper memory (up to the
* first memory hole), into the "mbi.mem_{lower,upper}"
* elements. This is for OS's that don't care about the memory
* map, but might care about total RAM available.
*/
mbi.mem_lower = mmap_avail_at (0) >> 10;
mbi.mem_upper = mmap_avail_at (0x100000) >> 10;
/* Find the maximum available address. Ignore any memory holes. */
for (max_addr = 0, addr = mbi.mmap_addr;
addr < mbi.mmap_addr + mbi.mmap_length;
addr += *((unsigned long *) addr) + 4)
{
struct AddrRangeDesc *desc = (struct AddrRangeDesc *) addr;
if (desc->Type == MB_ARD_MEMORY && desc->Length > 0
&& desc->BaseAddr + desc->Length > max_addr)
max_addr = desc->BaseAddr + desc->Length;
}
extended_memory = (max_addr - 0x100000) >> 10;
}
else if ((memtmp = get_eisamemsize ()) != -1)
{
cont = memtmp & ~0xFFFF;
memtmp = memtmp & 0xFFFF;
if (cont != 0)
extended_memory = (cont >> 10) + 0x3c00;
else
extended_memory = memtmp;
if (!cont || (memtmp == 0x3c00))
memtmp += (cont >> 10);
else
{
/* XXX should I do this at all ??? */
mbi.mmap_addr = (unsigned long) fakemap;
mbi.mmap_length = sizeof (fakemap);
fakemap[0].Length = (mbi.mem_lower << 10);
fakemap[1].Length = (memtmp << 10);
fakemap[2].Length = cont;
}
mbi.mem_upper = memtmp;
}
saved_mem_upper = mbi.mem_upper;
#ifdef SUPPORT_NETBOOT
#ifdef SOLARIS_NETBOOT
/* leave room for dhcpack_buf */
dhcpack_buf = addr;
addr += sizeof (struct dhcp_t);
#endif
#endif
/* Get the drive info. */
/* FIXME: This should be postponed until a Multiboot kernel actually
requires it, because this could slow down the start-up
unreasonably. */
mbi.drives_length = 0;
mbi.drives_addr = addr;
/* For now, GRUB doesn't probe floppies, since it is trivial to map
floppy drives to BIOS drives. */
for (drive = 0x80; drive < 0x88; drive++)
{
struct geometry geom;
struct drive_info *info = (struct drive_info *) addr;
unsigned short *port;
/* Get the geometry. This ensures that the drive is present. */
if (get_diskinfo (drive, &geom))
break;
/* Clean out the I/O map. */
grub_memset ((char *) io_map, 0,
IO_MAP_SIZE * sizeof (unsigned short));
/* Disable to probe I/O ports temporarily, because this doesn't
work with some BIOSes (maybe they are too buggy). */
#if 0
/* Track the int13 handler. */
track_int13 (drive);
#endif
/* Set the information. */
info->drive_number = drive;
info->drive_mode = ((geom.flags & BIOSDISK_FLAG_LBA_EXTENSION)
? MB_DI_LBA_MODE : MB_DI_CHS_MODE);
info->drive_cylinders = geom.cylinders;
info->drive_heads = geom.heads;
info->drive_sectors = geom.sectors;
addr += sizeof (struct drive_info);
for (port = io_map; *port; port++, addr += sizeof (unsigned short))
*((unsigned short *) addr) = *port;
info->size = addr - (unsigned long) info;
mbi.drives_length += info->size;
}
/* Get the ROM configuration table by INT 15, AH=C0h. */
mbi.config_table = get_rom_config_table ();
/* Set the boot loader name. */
mbi.boot_loader_name = (unsigned long) "GNU GRUB " VERSION;
/* Get the APM BIOS table. */
get_apm_info ();
if (apm_bios_info.version)
mbi.apm_table = (unsigned long) &apm_bios_info;
/*
* Initialize other Multiboot Info flags.
*/
mbi.flags = (MB_INFO_MEMORY | MB_INFO_CMDLINE | MB_INFO_BOOTDEV
| MB_INFO_DRIVE_INFO | MB_INFO_CONFIG_TABLE
| MB_INFO_BOOT_LOADER_NAME);
if (apm_bios_info.version)
mbi.flags |= MB_INFO_APM_TABLE;
#endif /* STAGE1_5 */
/* Set boot drive and partition. */
saved_drive = boot_drive;
saved_partition = install_partition;
/* Set cdrom drive. */
{
struct geometry geom;
/* Get the geometry. */
if (get_diskinfo (boot_drive, &geom)
|| ! (geom.flags & BIOSDISK_FLAG_CDROM))
cdrom_drive = GRUB_INVALID_DRIVE;
else
cdrom_drive = boot_drive;
}
/* Start main routine here. */
cmain ();
}