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bootparam.h
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1 #ifndef _ASM_X86_BOOTPARAM_H
2 #define _ASM_X86_BOOTPARAM_H
3 
4 #include <linux/types.h>
5 #include <linux/screen_info.h>
6 #include <linux/apm_bios.h>
7 #include <linux/edd.h>
8 #include <asm/e820.h>
9 #include <asm/ist.h>
10 #include <video/edid.h>
11 
12 /* setup data types */
13 #define SETUP_NONE 0
14 #define SETUP_E820_EXT 1
15 #define SETUP_DTB 2
16 
17 /* extensible setup data list node */
18 struct setup_data {
19  __u64 next;
20  __u32 type;
21  __u32 len;
22  __u8 data[0];
23 };
24 
25 struct setup_header {
26  __u8 setup_sects;
27  __u16 root_flags;
28  __u32 syssize;
29  __u16 ram_size;
30 #define RAMDISK_IMAGE_START_MASK 0x07FF
31 #define RAMDISK_PROMPT_FLAG 0x8000
32 #define RAMDISK_LOAD_FLAG 0x4000
33  __u16 vid_mode;
34  __u16 root_dev;
35  __u16 boot_flag;
36  __u16 jump;
37  __u32 header;
38  __u16 version;
39  __u32 realmode_swtch;
40  __u16 start_sys;
41  __u16 kernel_version;
42  __u8 type_of_loader;
43  __u8 loadflags;
44 #define LOADED_HIGH (1<<0)
45 #define QUIET_FLAG (1<<5)
46 #define KEEP_SEGMENTS (1<<6)
47 #define CAN_USE_HEAP (1<<7)
48  __u16 setup_move_size;
49  __u32 code32_start;
50  __u32 ramdisk_image;
51  __u32 ramdisk_size;
52  __u32 bootsect_kludge;
53  __u16 heap_end_ptr;
54  __u8 ext_loader_ver;
55  __u8 ext_loader_type;
56  __u32 cmd_line_ptr;
57  __u32 initrd_addr_max;
58  __u32 kernel_alignment;
59  __u8 relocatable_kernel;
60  __u8 _pad2[3];
61  __u32 cmdline_size;
62  __u32 hardware_subarch;
63  __u64 hardware_subarch_data;
64  __u32 payload_offset;
65  __u32 payload_length;
66  __u64 setup_data;
67  __u64 pref_address;
68  __u32 init_size;
69  __u32 handover_offset;
70 } __attribute__((packed));
71 
72 struct sys_desc_table {
73  __u16 length;
74  __u8 table[14];
75 };
76 
77 /* Gleaned from OFW's set-parameters in cpu/x86/pc/linux.fth */
78 struct olpc_ofw_header {
79  __u32 ofw_magic; /* OFW signature */
80  __u32 ofw_version;
81  __u32 cif_handler; /* callback into OFW */
82  __u32 irq_desc_table;
83 } __attribute__((packed));
84 
85 struct efi_info {
86  __u32 efi_loader_signature;
87  __u32 efi_systab;
88  __u32 efi_memdesc_size;
89  __u32 efi_memdesc_version;
90  __u32 efi_memmap;
91  __u32 efi_memmap_size;
92  __u32 efi_systab_hi;
93  __u32 efi_memmap_hi;
94 };
95 
96 /* The so-called "zeropage" */
97 struct boot_params {
98  struct screen_info screen_info; /* 0x000 */
99  struct apm_bios_info apm_bios_info; /* 0x040 */
100  __u8 _pad2[4]; /* 0x054 */
101  __u64 tboot_addr; /* 0x058 */
102  struct ist_info ist_info; /* 0x060 */
103  __u8 _pad3[16]; /* 0x070 */
104  __u8 hd0_info[16]; /* obsolete! */ /* 0x080 */
105  __u8 hd1_info[16]; /* obsolete! */ /* 0x090 */
106  struct sys_desc_table sys_desc_table; /* 0x0a0 */
107  struct olpc_ofw_header olpc_ofw_header; /* 0x0b0 */
108  __u8 _pad4[128]; /* 0x0c0 */
109  struct edid_info edid_info; /* 0x140 */
110  struct efi_info efi_info; /* 0x1c0 */
111  __u32 alt_mem_k; /* 0x1e0 */
112  __u32 scratch; /* Scratch field! */ /* 0x1e4 */
113  __u8 e820_entries; /* 0x1e8 */
114  __u8 eddbuf_entries; /* 0x1e9 */
115  __u8 edd_mbr_sig_buf_entries; /* 0x1ea */
116  __u8 kbd_status; /* 0x1eb */
117  __u8 _pad6[5]; /* 0x1ec */
118  struct setup_header hdr; /* setup header */ /* 0x1f1 */
119  __u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)];
120  __u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */
121  struct e820entry e820_map[E820MAX]; /* 0x2d0 */
122  __u8 _pad8[48]; /* 0xcd0 */
123  struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */
124  __u8 _pad9[276]; /* 0xeec */
125 } __attribute__((packed));
126 
127 enum {
128  X86_SUBARCH_PC = 0,
129  X86_SUBARCH_LGUEST,
130  X86_SUBARCH_XEN,
131  X86_SUBARCH_MRST,
132  X86_SUBARCH_CE4100,
133  X86_NR_SUBARCHS,
134 };
135 
136 
137 
138 #endif /* _ASM_X86_BOOTPARAM_H */
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