• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  *  GRUB  --  GRand Unified Bootloader
3  *  Copyright (C) 2000  Free Software Foundation, Inc.
4  *
5  *  This program is free software; you can redistribute it and/or modify
6  *  it under the terms of the GNU General Public License as published by
7  *  the Free Software Foundation; either version 2 of the License, or
8  *  (at your option) any later version.
9  *
10  *  This program is distributed in the hope that it will be useful,
11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  *  GNU General Public License for more details.
14  *
15  *  You should have received a copy of the GNU General Public License
16  *  along with this program; if not, write to the Free Software
17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18  */
19 
20 /*
21  *  The structure type "mod_list" is used by the "multiboot_info" structure.
22  */
23 
24 #ifndef MBOOT_MB_INFO_H
25 #define MBOOT_MB_INFO_H
26 
27 #include <inttypes.h>
28 
29 struct mod_list {
30     /* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
31     uint32_t mod_start;
32     uint32_t mod_end;
33 
34     /* Module command line */
35     uint32_t cmdline;
36 
37     /* padding to take it to 16 bytes (must be zero) */
38     uint32_t pad;
39 };
40 
41 /*
42  *  INT-15, AX=E820 style "AddressRangeDescriptor"
43  *  ...with a "size" parameter on the front which is the structure size - 4,
44  *  pointing to the next one, up until the full buffer length of the memory
45  *  map has been reached.
46  */
47 
48 struct AddrRangeDesc {
49     uint32_t size;
50     uint64_t BaseAddr;
51     uint64_t Length;
52     uint32_t Type;
53     /* unspecified optional padding... */
54 } __attribute__ ((packed));
55 
56 /* usable memory "Type", all others are reserved.  */
57 #define MB_ARD_MEMORY		1
58 
59 /* Drive Info structure.  */
60 struct drive_info {
61     /* The size of this structure.  */
62     uint32_t size;
63 
64     /* The BIOS drive number.  */
65     uint8_t drive_number;
66 
67     /* The access mode (see below).  */
68     uint8_t drive_mode;
69 
70     /* The BIOS geometry.  */
71     uint16_t drive_cylinders;
72     uint8_t drive_heads;
73     uint8_t drive_sectors;
74 
75     /* The array of I/O ports used for the drive.  */
76     uint16_t drive_ports[0];
77 };
78 
79 /* Drive Mode.  */
80 #define MB_DI_CHS_MODE		0
81 #define MB_DI_LBA_MODE		1
82 
83 /* APM BIOS info.  */
84 struct apm_info {
85     uint16_t version;
86     uint16_t cseg;
87     uint32_t offset;
88     uint16_t cseg_16;
89     uint16_t dseg_16;
90     uint16_t cseg_len;
91     uint16_t cseg_16_len;
92     uint16_t dseg_16_len;
93 };
94 
95 /*
96  *  MultiBoot Info description
97  *
98  *  This is the struct passed to the boot image.  This is done by placing
99  *  its address in the EAX register.
100  */
101 
102 struct multiboot_info {
103     /* MultiBoot info version number */
104     uint32_t flags;
105 
106     /* Available memory from BIOS */
107     uint32_t mem_lower;
108     uint32_t mem_upper;
109 
110     /* "root" partition */
111     uint32_t boot_device;
112 
113     /* Kernel command line */
114     uint32_t cmdline;
115 
116     /* Boot-Module list */
117     uint32_t mods_count;
118     uint32_t mods_addr;
119 
120     union {
121 	struct {
122 	    /* (a.out) Kernel symbol table info */
123 	    uint32_t tabsize;
124 	    uint32_t strsize;
125 	    uint32_t addr;
126 	    uint32_t pad;
127 	} a;
128 	struct {
129 	    /* (ELF) Kernel section header table */
130 	    uint32_t num;
131 	    uint32_t size;
132 	    uint32_t addr;
133 	    uint32_t shndx;
134 	} e;
135     } syms;
136 
137     /* Memory Mapping buffer */
138     uint32_t mmap_length;
139     uint32_t mmap_addr;
140 
141     /* Drive Info buffer */
142     uint32_t drives_length;
143     uint32_t drives_addr;
144 
145     /* ROM configuration table */
146     uint32_t config_table;
147 
148     /* Boot Loader Name */
149     uint32_t boot_loader_name;
150 
151     /* APM table */
152     uint32_t apm_table;
153 
154     /* Video */
155     uint32_t vbe_control_info;
156     uint32_t vbe_mode_info;
157     uint16_t vbe_mode;
158     uint16_t vbe_interface_seg;
159     uint16_t vbe_interface_off;
160     uint16_t vbe_interface_len;
161 };
162 
163 /*
164  *  Flags to be set in the 'flags' parameter above
165  */
166 
167 /* is there basic lower/upper memory information? */
168 #define MB_INFO_MEMORY			0x00000001
169 /* is there a boot device set? */
170 #define MB_INFO_BOOTDEV			0x00000002
171 /* is the command-line defined? */
172 #define MB_INFO_CMDLINE			0x00000004
173 /* are there modules to do something with? */
174 #define MB_INFO_MODS			0x00000008
175 
176 /* These next two are mutually exclusive */
177 
178 /* is there a symbol table loaded? */
179 #define MB_INFO_AOUT_SYMS		0x00000010
180 /* is there an ELF section header table? */
181 #define MB_INFO_ELF_SHDR		0x00000020
182 
183 /* is there a full memory map? */
184 #define MB_INFO_MEM_MAP			0x00000040
185 
186 /* Is there drive info?  */
187 #define MB_INFO_DRIVE_INFO		0x00000080
188 
189 /* Is there a config table?  */
190 #define MB_INFO_CONFIG_TABLE		0x00000100
191 
192 /* Is there a boot loader name?  */
193 #define MB_INFO_BOOT_LOADER_NAME	0x00000200
194 
195 /* Is there a APM table?  */
196 #define MB_INFO_APM_TABLE		0x00000400
197 
198 /* Is there video information?  */
199 #define MB_INFO_VIDEO_INFO		0x00000800
200 
201 /*
202  *  The following value must be present in the EAX register.
203  */
204 
205 #define MULTIBOOT_VALID			0x2BADB002
206 
207 #endif /* MBOOT_MB_INFO_H */
208