summaryrefslogtreecommitdiffstats
path: root/arch/x86/include/uapi/asm/bootparam.h
blob: 8669c6bdbb84691c2425f4fa17d32fd2300f4040 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _ASM_X86_BOOTPARAM_H
#define _ASM_X86_BOOTPARAM_H

/* setup_data/setup_indirect types */
#define SETUP_NONE			0
#define SETUP_E820_EXT			1
#define SETUP_DTB			2
#define SETUP_PCI			3
#define SETUP_EFI			4
#define SETUP_APPLE_PROPERTIES		5
#define SETUP_JAILHOUSE			6

#define SETUP_INDIRECT			(1<<31)

/* SETUP_INDIRECT | max(SETUP_*) */
#define SETUP_TYPE_MAX			(SETUP_INDIRECT | SETUP_JAILHOUSE)

/* ram_size flags */
#define RAMDISK_IMAGE_START_MASK	0x07FF
#define RAMDISK_PROMPT_FLAG		0x8000
#define RAMDISK_LOAD_FLAG		0x4000

/* loadflags */
#define LOADED_HIGH	(1<<0)
#define KASLR_FLAG	(1<<1)
#define QUIET_FLAG	(1<<5)
#define KEEP_SEGMENTS	(1<<6)
#define CAN_USE_HEAP	(1<<7)

/* xloadflags */
#define XLF_KERNEL_64			(1<<0)
#define XLF_CAN_BE_LOADED_ABOVE_4G	(1<<1)
#define XLF_EFI_HANDOVER_32		(1<<2)
#define XLF_EFI_HANDOVER_64		(1<<3)
#define XLF_EFI_KEXEC			(1<<4)
#define XLF_5LEVEL			(1<<5)
#define XLF_5LEVEL_ENABLED		(1<<6)

#ifndef __ASSEMBLY__

#include <linux/types.h>
#include <linux/screen_info.h>
#include <linux/apm_bios.h>
#include <linux/edd.h>
#include <asm/ist.h>
#include <video/edid.h>

/* extensible setup data list node */
struct setup_data {
	__u64 next;
	__u32 type;
	__u32 len;
	__u8 data[0];
};

/* extensible setup indirect data node */
struct setup_indirect {
	__u32 type;
	__u32 reserved;  /* Reserved, must be set to zero. */
	__u64 len;
	__u64 addr;
};

struct setup_header {
	__u8	setup_sects;
	__u16	root_flags;
	__u32	syssize;
	__u16	ram_size;
	__u16	vid_mode;
	__u16	root_dev;
	__u16	boot_flag;
	__u16	jump;
	__u32	header;
	__u16	version;
	__u32	realmode_swtch;
	__u16	start_sys_seg;
	__u16	kernel_version;
	__u8	type_of_loader;
	__u8	loadflags;
	__u16	setup_move_size;
	__u32	code32_start;
	__u32	ramdisk_image;
	__u32	ramdisk_size;
	__u32	bootsect_kludge;
	__u16	heap_end_ptr;
	__u8	ext_loader_ver;
	__u8	ext_loader_type;
	__u32	cmd_line_ptr;
	__u32	initrd_addr_max;
	__u32	kernel_alignment;
	__u8	relocatable_kernel;
	__u8	min_alignment;
	__u16	xloadflags;
	__u32	cmdline_size;
	__u32	hardware_subarch;
	__u64	hardware_subarch_data;
	__u32	payload_offset;
	__u32	payload_length;
	__u64	setup_data;
	__u64	pref_address;
	__u32	init_size;
	__u32	handover_offset;
	__u32	kernel_info_offset;
} __attribute__((packed));

struct sys_desc_table {
	__u16 length;
	__u8  table[14];
};

/* Gleaned from OFW's set-parameters in cpu/x86/pc/linux.fth */
struct olpc_ofw_header {
	__u32 ofw_magic;	/* OFW signature */
	__u32 ofw_version;
	__u32 cif_handler;	/* callback into OFW */
	__u32 irq_desc_table;
} __attribute__((packed));

struct efi_info {
	__u32 efi_loader_signature;
	__u32 efi_systab;
	__u32 efi_memdesc_size;
	__u32 efi_memdesc_version;
	__u32 efi_memmap;
	__u32 efi_memmap_size;
	__u32 efi_systab_hi;
	__u32 efi_memmap_hi;
};

/*
 * This is the maximum number of entries in struct boot_params::e820_table
 * (the zeropage), which is part of the x86 boot protocol ABI:
 */
#define E820_MAX_ENTRIES_ZEROPAGE 128

/*
 * The E820 memory region entry of the boot protocol ABI:
 */
struct boot_e820_entry {
	__u64 addr;
	__u64 size;
	__u32 type;
} __attribute__((packed));

/*
 * Smallest compatible version of jailhouse_setup_data required by this kernel.
 */
#define JAILHOUSE_SETUP_REQUIRED_VERSION	1

/*
 * The boot loader is passing platform information via this Jailhouse-specific
 * setup data structure.
 */
struct jailhouse_setup_data {
	struct {
		__u16	version;
		__u16	compatible_version;
	} __attribute__((packed)) hdr;
	struct {
		__u16	pm_timer_address;
		__u16	num_cpus;
		__u64	pci_mmconfig_base;
		__u32	tsc_khz;
		__u32	apic_khz;
		__u8	standard_ioapic;
		__u8	cpu_ids[255];
	} __attribute__((packed)) v1;
	struct {
		__u32	flags;
	} __attribute__((packed)) v2;
} __attribute__((packed));

/* The so-called "zeropage" */
struct boot_params {
	struct screen_info screen_info;			/* 0x000 */
	struct apm_bios_info apm_bios_info;		/* 0x040 */
	__u8  _pad2[4];					/* 0x054 */
	__u64  tboot_addr;				/* 0x058 */
	struct ist_info ist_info;			/* 0x060 */
	__u64 acpi_rsdp_addr;				/* 0x070 */
	__u8  _pad3[8];					/* 0x078 */
	__u8  hd0_info[16];	/* obsolete! */		/* 0x080 */
	__u8  hd1_info[16];	/* obsolete! */		/* 0x090 */
	struct sys_desc_table sys_desc_table; /* obsolete! */	/* 0x0a0 */
	struct olpc_ofw_header olpc_ofw_header;		/* 0x0b0 */
	__u32 ext_ramdisk_image;			/* 0x0c0 */
	__u32 ext_ramdisk_size;				/* 0x0c4 */
	__u32 ext_cmd_line_ptr;				/* 0x0c8 */
	__u8  _pad4[116];				/* 0x0cc */
	struct edid_info edid_info;			/* 0x140 */
	struct efi_info efi_info;			/* 0x1c0 */
	__u32 alt_mem_k;				/* 0x1e0 */
	__u32 scratch;		/* Scratch field! */	/* 0x1e4 */
	__u8  e820_entries;				/* 0x1e8 */
	__u8  eddbuf_entries;				/* 0x1e9 */
	__u8  edd_mbr_sig_buf_entries;			/* 0x1ea */
	__u8  kbd_status;				/* 0x1eb */
	__u8  secure_boot;				/* 0x1ec */
	__u8  _pad5[2];					/* 0x1ed */
	/*
	 * The sentinel is set to a nonzero value (0xff) in header.S.
	 *
	 * A bootloader is supposed to only take setup_header and put
	 * it into a clean boot_params buffer. If it turns out that
	 * it is clumsy or too generous with the buffer, it most
	 * probably will pick up the sentinel variable too. The fact
	 * that this variable then is still 0xff will let kernel
	 * know that some variables in boot_params are invalid and
	 * kernel should zero out certain portions of boot_params.
	 */
	__u8  sentinel;					/* 0x1ef */
	__u8  _pad6[1];					/* 0x1f0 */
	struct setup_header hdr;    /* setup header */	/* 0x1f1 */
	__u8  _pad7[0x290-0x1f1-sizeof(struct setup_header)];
	__u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX];	/* 0x290 */
	struct boot_e820_entry e820_table[E820_MAX_ENTRIES_ZEROPAGE]; /* 0x2d0 */
	__u8  _pad8[48];				/* 0xcd0 */
	struct edd_info eddbuf[EDDMAXNR];		/* 0xd00 */
	__u8  _pad9[276];				/* 0xeec */
} __attribute__((packed));

/**
 * enum x86_hardware_subarch - x86 hardware subarchitecture
 *
 * The x86 hardware_subarch and hardware_subarch_data were added as of the x86
 * boot protocol 2.07 to help distinguish and support custom x86 boot
 * sequences. This enum represents accepted values for the x86
 * hardware_subarch.  Custom x86 boot sequences (not X86_SUBARCH_PC) do not
 * have or simply *cannot* make use of natural stubs like BIOS or EFI, the
 * hardware_subarch can be used on the Linux entry path to revector to a
 * subarchitecture stub when needed. This subarchitecture stub can be used to
 * set up Linux boot parameters or for special care to account for nonstandard
 * handling of page tables.
 *
 * These enums should only ever be used by x86 code, and the code that uses
 * it should be well contained and compartamentalized.
 *
 * KVM and Xen HVM do not have a subarch as these are expected to follow
 * standard x86 boot entries. If there is a genuine need for "hypervisor" type
 * that should be considered separately in the future. Future guest types
 * should seriously consider working with standard x86 boot stubs such as
 * the BIOS or EFI boot stubs.
 *
 * WARNING: this enum is only used for legacy hacks, for platform features that
 *	    are not easily enumerated or discoverable. You should not ever use
 *	    this for new features.
 *
 * @X86_SUBARCH_PC: Should be used if the hardware is enumerable using standard
 *	PC mechanisms (PCI, ACPI) and doesn't need a special boot flow.
 * @X86_SUBARCH_LGUEST: Used for x86 hypervisor demo, lguest, deprecated
 * @X86_SUBARCH_XEN: Used for Xen guest types which follow the PV boot path,
 * 	which start at asm startup_xen() entry point and later jump to the C
 * 	xen_start_kernel() entry point. Both domU and dom0 type of guests are
 * 	currently supportd through this PV boot path.
 * @X86_SUBARCH_INTEL_MID: Used for Intel MID (Mobile Internet Device) platform
 *	systems which do not have the PCI legacy interfaces.
 * @X86_SUBARCH_CE4100: Used for Intel CE media processor (CE4100) SoC for
 * 	for settop boxes and media devices, the use of a subarch for CE4100
 * 	is more of a hack...
 */
enum x86_hardware_subarch {
	X86_SUBARCH_PC = 0,
	X86_SUBARCH_LGUEST,
	X86_SUBARCH_XEN,
	X86_SUBARCH_INTEL_MID,
	X86_SUBARCH_CE4100,
	X86_NR_SUBARCHS,
};

#endif /* __ASSEMBLY__ */

#endif /* _ASM_X86_BOOTPARAM_H */