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1965aae3 PA |
1 | #ifndef _ASM_X86_BOOTPARAM_H |
2 | #define _ASM_X86_BOOTPARAM_H | |
48c7ae67 | 3 | |
09c205af PA |
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 | |
1fec0533 | 9 | #define SETUP_EFI 4 |
09c205af PA |
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) | |
78cac48c | 18 | #define KASLR_FLAG (1<<1) |
09c205af PA |
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) | |
456a29dd | 28 | #define XLF_EFI_KEXEC (1<<4) |
09c205af PA |
29 | |
30 | #ifndef __ASSEMBLY__ | |
31 | ||
48c7ae67 PA |
32 | #include <linux/types.h> |
33 | #include <linux/screen_info.h> | |
34 | #include <linux/apm_bios.h> | |
48c7ae67 | 35 | #include <linux/edd.h> |
238b706d PA |
36 | #include <asm/e820.h> |
37 | #include <asm/ist.h> | |
48c7ae67 PA |
38 | #include <video/edid.h> |
39 | ||
8b664aa6 HY |
40 | /* extensible setup data list node */ |
41 | struct setup_data { | |
afaafe50 RR |
42 | __u64 next; |
43 | __u32 type; | |
44 | __u32 len; | |
45 | __u8 data[0]; | |
8b664aa6 HY |
46 | }; |
47 | ||
48c7ae67 | 48 | struct setup_header { |
ee8e7cfe RR |
49 | __u8 setup_sects; |
50 | __u16 root_flags; | |
51 | __u32 syssize; | |
52 | __u16 ram_size; | |
ee8e7cfe RR |
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; | |
ee8e7cfe RR |
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; | |
5031296c PA |
70 | __u8 ext_loader_ver; |
71 | __u8 ext_loader_type; | |
ee8e7cfe RR |
72 | __u32 cmd_line_ptr; |
73 | __u32 initrd_addr_max; | |
74 | __u32 kernel_alignment; | |
75 | __u8 relocatable_kernel; | |
09c205af PA |
76 | __u8 min_alignment; |
77 | __u16 xloadflags; | |
ee8e7cfe RR |
78 | __u32 cmdline_size; |
79 | __u32 hardware_subarch; | |
80 | __u64 hardware_subarch_data; | |
8b664aa6 HY |
81 | __u32 payload_offset; |
82 | __u32 payload_length; | |
83 | __u64 setup_data; | |
8af21e7e MF |
84 | __u64 pref_address; |
85 | __u32 init_size; | |
9ca8f72a | 86 | __u32 handover_offset; |
48c7ae67 PA |
87 | } __attribute__((packed)); |
88 | ||
89 | struct sys_desc_table { | |
ee8e7cfe RR |
90 | __u16 length; |
91 | __u8 table[14]; | |
48c7ae67 PA |
92 | }; |
93 | ||
fd699c76 AS |
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 | ||
48c7ae67 | 102 | struct efi_info { |
5b83683f | 103 | __u32 efi_loader_signature; |
ee8e7cfe RR |
104 | __u32 efi_systab; |
105 | __u32 efi_memdesc_size; | |
106 | __u32 efi_memdesc_version; | |
107 | __u32 efi_memmap; | |
108 | __u32 efi_memmap_size; | |
5b83683f HY |
109 | __u32 efi_systab_hi; |
110 | __u32 efi_memmap_hi; | |
48c7ae67 PA |
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 */ | |
31625340 JC |
117 | __u8 _pad2[4]; /* 0x054 */ |
118 | __u64 tboot_addr; /* 0x058 */ | |
238b706d | 119 | struct ist_info ist_info; /* 0x060 */ |
ee8e7cfe RR |
120 | __u8 _pad3[16]; /* 0x070 */ |
121 | __u8 hd0_info[16]; /* obsolete! */ /* 0x080 */ | |
122 | __u8 hd1_info[16]; /* obsolete! */ /* 0x090 */ | |
94916301 | 123 | struct sys_desc_table sys_desc_table; /* obsolete! */ /* 0x0a0 */ |
fd699c76 | 124 | struct olpc_ofw_header olpc_ofw_header; /* 0x0b0 */ |
09c205af PA |
125 | __u32 ext_ramdisk_image; /* 0x0c0 */ |
126 | __u32 ext_ramdisk_size; /* 0x0c4 */ | |
127 | __u32 ext_cmd_line_ptr; /* 0x0c8 */ | |
128 | __u8 _pad4[116]; /* 0x0cc */ | |
48c7ae67 PA |
129 | struct edid_info edid_info; /* 0x140 */ |
130 | struct efi_info efi_info; /* 0x1c0 */ | |
ee8e7cfe RR |
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 */ | |
b2d0b7a0 | 136 | __u8 kbd_status; /* 0x1eb */ |
09c205af PA |
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 */ | |
48c7ae67 | 151 | struct setup_header hdr; /* setup header */ /* 0x1f1 */ |
ee8e7cfe RR |
152 | __u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)]; |
153 | __u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */ | |
48c7ae67 | 154 | struct e820entry e820_map[E820MAX]; /* 0x2d0 */ |
ee8e7cfe | 155 | __u8 _pad8[48]; /* 0xcd0 */ |
48c7ae67 | 156 | struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */ |
ee8e7cfe | 157 | __u8 _pad9[276]; /* 0xeec */ |
48c7ae67 PA |
158 | } __attribute__((packed)); |
159 | ||
18c78a96 LR |
160 | /** |
161 | * enum x86_hardware_subarch - x86 hardware subarchitecture | |
162 | * | |
163 | * The x86 hardware_subarch and hardware_subarch_data were added as of the x86 | |
164 | * boot protocol 2.07 to help distinguish and support custom x86 boot | |
165 | * sequences. This enum represents accepted values for the x86 | |
166 | * hardware_subarch. Custom x86 boot sequences (not X86_SUBARCH_PC) do not | |
167 | * have or simply *cannot* make use of natural stubs like BIOS or EFI, the | |
168 | * hardware_subarch can be used on the Linux entry path to revector to a | |
169 | * subarchitecture stub when needed. This subarchitecture stub can be used to | |
170 | * set up Linux boot parameters or for special care to account for nonstandard | |
171 | * handling of page tables. | |
172 | * | |
173 | * These enums should only ever be used by x86 code, and the code that uses | |
174 | * it should be well contained and compartamentalized. | |
175 | * | |
176 | * KVM and Xen HVM do not have a subarch as these are expected to follow | |
177 | * standard x86 boot entries. If there is a genuine need for "hypervisor" type | |
178 | * that should be considered separately in the future. Future guest types | |
179 | * should seriously consider working with standard x86 boot stubs such as | |
180 | * the BIOS or EFI boot stubs. | |
181 | * | |
182 | * WARNING: this enum is only used for legacy hacks, for platform features that | |
183 | * are not easily enumerated or discoverable. You should not ever use | |
184 | * this for new features. | |
185 | * | |
186 | * @X86_SUBARCH_PC: Should be used if the hardware is enumerable using standard | |
187 | * PC mechanisms (PCI, ACPI) and doesn't need a special boot flow. | |
188 | * @X86_SUBARCH_LGUEST: Used for x86 hypervisor demo, lguest | |
189 | * @X86_SUBARCH_XEN: Used for Xen guest types which follow the PV boot path, | |
190 | * which start at asm startup_xen() entry point and later jump to the C | |
191 | * xen_start_kernel() entry point. Both domU and dom0 type of guests are | |
192 | * currently supportd through this PV boot path. | |
193 | * @X86_SUBARCH_INTEL_MID: Used for Intel MID (Mobile Internet Device) platform | |
194 | * systems which do not have the PCI legacy interfaces. | |
195 | * @X86_SUBARCH_CE4100: Used for Intel CE media processor (CE4100) SoC for | |
196 | * for settop boxes and media devices, the use of a subarch for CE4100 | |
197 | * is more of a hack... | |
198 | */ | |
199 | enum x86_hardware_subarch { | |
162bc7ab PJ |
200 | X86_SUBARCH_PC = 0, |
201 | X86_SUBARCH_LGUEST, | |
202 | X86_SUBARCH_XEN, | |
712b6aa8 | 203 | X86_SUBARCH_INTEL_MID, |
c751e17b | 204 | X86_SUBARCH_CE4100, |
162bc7ab PJ |
205 | X86_NR_SUBARCHS, |
206 | }; | |
207 | ||
09c205af | 208 | #endif /* __ASSEMBLY__ */ |
162bc7ab | 209 | |
1965aae3 | 210 | #endif /* _ASM_X86_BOOTPARAM_H */ |