--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usr/src/grub/grub-0.97/stage2/common.c	Fri Nov 07 21:36:41 2008 -0700
@@ -0,0 +1,354 @@
+/* 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"
+};
+
+
+/* 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 ();
+}