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