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1 #ifndef _ASM_X86_BOOTPARAM_H
2 #define _ASM_X86_BOOTPARAM_H
3 
4 /* setup_data types */
5 #define SETUP_NONE			0
6 #define SETUP_E820_EXT			1
7 #define SETUP_DTB			2
8 #define SETUP_PCI			3
9 #define SETUP_EFI			4
10 
11 /* ram_size flags */
12 #define RAMDISK_IMAGE_START_MASK	0x07FF
13 #define RAMDISK_PROMPT_FLAG		0x8000
14 #define RAMDISK_LOAD_FLAG		0x4000
15 
16 /* loadflags */
17 #define LOADED_HIGH	(1<<0)
18 #define KASLR_FLAG	(1<<1)
19 #define QUIET_FLAG	(1<<5)
20 #define KEEP_SEGMENTS	(1<<6)
21 #define CAN_USE_HEAP	(1<<7)
22 
23 /* xloadflags */
24 #define XLF_KERNEL_64			(1<<0)
25 #define XLF_CAN_BE_LOADED_ABOVE_4G	(1<<1)
26 #define XLF_EFI_HANDOVER_32		(1<<2)
27 #define XLF_EFI_HANDOVER_64		(1<<3)
28 #define XLF_EFI_KEXEC			(1<<4)
29 
30 #ifndef __ASSEMBLY__
31 
32 #include <linux/types.h>
33 #include <linux/screen_info.h>
34 #include <linux/apm_bios.h>
35 #include <linux/edd.h>
36 #include <asm/e820.h>
37 #include <asm/ist.h>
38 #include <video/edid.h>
39 
40 /* extensible setup data list node */
41 struct setup_data {
42 	__u64 next;
43 	__u32 type;
44 	__u32 len;
45 	__u8 data[0];
46 };
47 
48 struct setup_header {
49 	__u8	setup_sects;
50 	__u16	root_flags;
51 	__u32	syssize;
52 	__u16	ram_size;
53 	__u16	vid_mode;
54 	__u16	root_dev;
55 	__u16	boot_flag;
56 	__u16	jump;
57 	__u32	header;
58 	__u16	version;
59 	__u32	realmode_swtch;
60 	__u16	start_sys;
61 	__u16	kernel_version;
62 	__u8	type_of_loader;
63 	__u8	loadflags;
64 	__u16	setup_move_size;
65 	__u32	code32_start;
66 	__u32	ramdisk_image;
67 	__u32	ramdisk_size;
68 	__u32	bootsect_kludge;
69 	__u16	heap_end_ptr;
70 	__u8	ext_loader_ver;
71 	__u8	ext_loader_type;
72 	__u32	cmd_line_ptr;
73 	__u32	initrd_addr_max;
74 	__u32	kernel_alignment;
75 	__u8	relocatable_kernel;
76 	__u8	min_alignment;
77 	__u16	xloadflags;
78 	__u32	cmdline_size;
79 	__u32	hardware_subarch;
80 	__u64	hardware_subarch_data;
81 	__u32	payload_offset;
82 	__u32	payload_length;
83 	__u64	setup_data;
84 	__u64	pref_address;
85 	__u32	init_size;
86 	__u32	handover_offset;
87 } __attribute__((packed));
88 
89 struct sys_desc_table {
90 	__u16 length;
91 	__u8  table[14];
92 };
93 
94 /* Gleaned from OFW's set-parameters in cpu/x86/pc/linux.fth */
95 struct olpc_ofw_header {
96 	__u32 ofw_magic;	/* OFW signature */
97 	__u32 ofw_version;
98 	__u32 cif_handler;	/* callback into OFW */
99 	__u32 irq_desc_table;
100 } __attribute__((packed));
101 
102 struct efi_info {
103 	__u32 efi_loader_signature;
104 	__u32 efi_systab;
105 	__u32 efi_memdesc_size;
106 	__u32 efi_memdesc_version;
107 	__u32 efi_memmap;
108 	__u32 efi_memmap_size;
109 	__u32 efi_systab_hi;
110 	__u32 efi_memmap_hi;
111 };
112 
113 /* The so-called "zeropage" */
114 struct boot_params {
115 	struct screen_info screen_info;			/* 0x000 */
116 	struct apm_bios_info apm_bios_info;		/* 0x040 */
117 	__u8  _pad2[4];					/* 0x054 */
118 	__u64  tboot_addr;				/* 0x058 */
119 	struct ist_info ist_info;			/* 0x060 */
120 	__u8  _pad3[16];				/* 0x070 */
121 	__u8  hd0_info[16];	/* obsolete! */		/* 0x080 */
122 	__u8  hd1_info[16];	/* obsolete! */		/* 0x090 */
123 	struct sys_desc_table sys_desc_table; /* obsolete! */	/* 0x0a0 */
124 	struct olpc_ofw_header olpc_ofw_header;		/* 0x0b0 */
125 	__u32 ext_ramdisk_image;			/* 0x0c0 */
126 	__u32 ext_ramdisk_size;				/* 0x0c4 */
127 	__u32 ext_cmd_line_ptr;				/* 0x0c8 */
128 	__u8  _pad4[116];				/* 0x0cc */
129 	struct edid_info edid_info;			/* 0x140 */
130 	struct efi_info efi_info;			/* 0x1c0 */
131 	__u32 alt_mem_k;				/* 0x1e0 */
132 	__u32 scratch;		/* Scratch field! */	/* 0x1e4 */
133 	__u8  e820_entries;				/* 0x1e8 */
134 	__u8  eddbuf_entries;				/* 0x1e9 */
135 	__u8  edd_mbr_sig_buf_entries;			/* 0x1ea */
136 	__u8  kbd_status;				/* 0x1eb */
137 	__u8  _pad5[3];					/* 0x1ec */
138 	/*
139 	 * The sentinel is set to a nonzero value (0xff) in header.S.
140 	 *
141 	 * A bootloader is supposed to only take setup_header and put
142 	 * it into a clean boot_params buffer. If it turns out that
143 	 * it is clumsy or too generous with the buffer, it most
144 	 * probably will pick up the sentinel variable too. The fact
145 	 * that this variable then is still 0xff will let kernel
146 	 * know that some variables in boot_params are invalid and
147 	 * kernel should zero out certain portions of boot_params.
148 	 */
149 	__u8  sentinel;					/* 0x1ef */
150 	__u8  _pad6[1];					/* 0x1f0 */
151 	struct setup_header hdr;    /* setup header */	/* 0x1f1 */
152 	__u8  _pad7[0x290-0x1f1-sizeof(struct setup_header)];
153 	__u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX];	/* 0x290 */
154 	struct e820entry e820_map[E820MAX];		/* 0x2d0 */
155 	__u8  _pad8[48];				/* 0xcd0 */
156 	struct edd_info eddbuf[EDDMAXNR];		/* 0xd00 */
157 	__u8  _pad9[276];				/* 0xeec */
158 } __attribute__((packed));
159 
160 enum {
161 	X86_SUBARCH_PC = 0,
162 	X86_SUBARCH_LGUEST,
163 	X86_SUBARCH_XEN,
164 	X86_SUBARCH_INTEL_MID,
165 	X86_SUBARCH_CE4100,
166 	X86_NR_SUBARCHS,
167 };
168 
169 #endif /* __ASSEMBLY__ */
170 
171 #endif /* _ASM_X86_BOOTPARAM_H */
172