Initial revision

shared_src/mb_info.h

@@ -0,0 +1,141 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1996   Erich Boleyn  <erich@uruk.org>
+ *
+ *  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.
+ */
+
+/*
+ *  The structure type "mod_list" is used by the "multiboot_info" structure.
+ */
+
+struct mod_list
+{
+  /* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
+  unsigned long mod_start;
+  unsigned long mod_end;
+
+  /* Module command line */
+  unsigned long cmdline;
+
+  /* padding to take it to 16 bytes (must be zero) */
+  unsigned long pad;
+};
+
+
+/*
+ *  INT-15, AX=E820 style "AddressRangeDescriptor"
+ *  ...with a "size" parameter on the front which is the structure size - 4,
+ *  pointing to the next one, up until the full buffer length of the memory
+ *  map has been reached.
+ */
+
+struct AddrRangeDesc
+{
+  unsigned long size;
+  unsigned long BaseAddrLow;
+  unsigned long BaseAddrHigh;
+  unsigned long LengthLow;
+  unsigned long LengthHigh;
+  unsigned long Type;
+
+  /* unspecified optional padding... */
+};
+
+/* usable memory "Type", all others are reserved.  */
+#define MB_ARD_MEMORY       1
+
+
+/*
+ *  MultiBoot Info description
+ *
+ *  This is the struct passed to the boot image.  This is done by placing
+ *  its address in the EAX register.
+ */
+
+struct multiboot_info
+{
+  /* MultiBoot info version number */
+  unsigned long flags;
+
+  /* Available memory from BIOS */
+  unsigned long mem_lower;
+  unsigned long mem_upper;
+
+  /* "root" partition */
+  unsigned long boot_device;
+
+  /* Kernel command line */
+  unsigned long cmdline;
+
+  /* Boot-Module list */
+  unsigned long mods_count;
+  unsigned long mods_addr;
+
+  union
+  {
+    struct
+    {
+      /* (a.out) Kernel symbol table info */
+      unsigned long tabsize;
+      unsigned long strsize;
+      unsigned long addr;
+      unsigned long pad;
+    } a;
+
+    struct
+    {
+      /* (ELF) Kernel section header table */
+      unsigned long num;
+      unsigned long size;
+      unsigned long addr;
+      unsigned long shndx;
+    } e;
+  } syms;
+
+  /* Memory Mapping buffer */
+  unsigned long mmap_length;
+  unsigned long mmap_addr;
+};
+
+/*
+ *  Flags to be set in the 'flags' parameter above
+ */
+
+/* is there basic lower/upper memory information? */
+#define MB_INFO_MEMORY          0x1
+/* is there a boot device set? */
+#define MB_INFO_BOOTDEV         0x2
+/* is the command-line defined? */
+#define MB_INFO_CMDLINE         0x4
+/* are there modules to do something with? */
+#define MB_INFO_MODS            0x8
+
+/* These next two are mutually exclusive */
+
+/* is there a symbol table loaded? */
+#define MB_INFO_AOUT_SYMS       0x10
+/* is there an ELF section header table? */
+#define MB_INFO_ELF_SHDR        0x20
+
+/* is there a full memory map? */
+#define MB_INFO_MEM_MAP         0x40
+
+/*
+ *  The following value must be present in the EAX register.
+ */
+
+#define MULTIBOOT_VALID         0x2BADB002
+