source: bootcd/isolinux/syslinux-6.03/com32/include/syslinux/linux.h

Last change on this file was e16e8f2, checked in by Edwin Eefting <edwin@datux.nl>, 3 years ago

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[e16e8f2]1/* ----------------------------------------------------------------------- *
2 *
3 *   Copyright 2007-2008 H. Peter Anvin - All Rights Reserved
4 *   Copyright 2012 Intel Corporation; author: H. Peter Anvin
5 *
6 *   Permission is hereby granted, free of charge, to any person
7 *   obtaining a copy of this software and associated documentation
8 *   files (the "Software"), to deal in the Software without
9 *   restriction, including without limitation the rights to use,
10 *   copy, modify, merge, publish, distribute, sublicense, and/or
11 *   sell copies of the Software, and to permit persons to whom
12 *   the Software is furnished to do so, subject to the following
13 *   conditions:
14 *
15 *   The above copyright notice and this permission notice shall
16 *   be included in all copies or substantial portions of the Software.
17 *
18 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
20 *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
22 *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
23 *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 *   OTHER DEALINGS IN THE SOFTWARE.
26 *
27 * ----------------------------------------------------------------------- */
28
29/*
30 * syslinux/linux.h
31 *
32 * Definitions used to boot a Linux kernel
33 */
34
35#ifndef _SYSLINUX_LINUX_H
36#define _SYSLINUX_LINUX_H
37
38#include <stddef.h>
39#include <stdint.h>
40#include <klibc/compiler.h>
41
42/* A chunk of an initramfs.  These are kept as a doubly-linked
43   circular list with headnode; the headnode is distinguished by
44   having len == 0.  The data pointer can be NULL if data_len is zero;
45   if data_len < len then the balance of the region is zeroed. */
46
47struct initramfs {
48    struct initramfs *prev, *next;
49    size_t len;
50    size_t align;
51    const void *data;
52    size_t data_len;
53};
54#define INITRAMFS_MAX_ALIGN     4096
55
56struct setup_data_header {
57        uint64_t next;
58        uint32_t type;
59        uint32_t len;
60} __packed;
61
62struct setup_data {
63    struct setup_data *prev, *next;
64    const void *data;
65    struct setup_data_header hdr;
66};
67
68#define SETUP_NONE      0
69#define SETUP_E820_EXT  1
70#define SETUP_DTB       2
71
72#define XLF_KERNEL_64                   (1 << 0)
73#define XLF_CAN_BE_LOADED_ABOVE_4G      (1 << 1)
74#define XLF_EFI_HANDOVER_32             (1 << 2)
75#define XLF_EFI_HANDOVER_64             (1 << 3)
76
77struct linux_header {
78    uint8_t boot_sector_1[0x0020];
79    uint16_t old_cmd_line_magic;
80    uint16_t old_cmd_line_offset;
81    uint8_t boot_sector_2[0x01f1 - 0x0024];
82    uint8_t setup_sects;
83    uint16_t root_flags;
84    uint32_t syssize;
85    uint16_t ram_size;
86    uint16_t vid_mode;
87    uint16_t root_dev;
88    uint16_t boot_flag;
89    uint16_t jump;
90    uint32_t header;
91    uint16_t version;
92    uint32_t realmode_swtch;
93    uint16_t start_sys;
94    uint16_t kernel_version;
95    uint8_t type_of_loader;
96    uint8_t loadflags;
97    uint16_t setup_move_size;
98    uint32_t code32_start;
99    uint32_t ramdisk_image;
100    uint32_t ramdisk_size;
101    uint32_t bootsect_kludge;
102    uint16_t heap_end_ptr;
103    uint16_t pad1;
104    uint32_t cmd_line_ptr;
105    uint32_t initrd_addr_max;
106    uint32_t kernel_alignment;
107    uint8_t relocatable_kernel;
108    uint8_t min_alignment;
109    uint16_t xloadflags;
110    uint32_t cmdline_max_len;
111    uint32_t hardware_subarch;
112    uint64_t hardware_subarch_data;
113    uint32_t payload_offset;
114    uint32_t payload_length;
115    uint64_t setup_data;
116    uint64_t pref_address;
117    uint32_t init_size;
118    uint32_t handover_offset;
119} __packed;
120
121struct screen_info {
122        uint8_t  orig_x;                /* 0x00 */
123        uint8_t  orig_y;                /* 0x01 */
124        uint16_t ext_mem_k;     /* 0x02 */
125        uint16_t orig_video_page;       /* 0x04 */
126        uint8_t  orig_video_mode;       /* 0x06 */
127        uint8_t  orig_video_cols;       /* 0x07 */
128        uint8_t  flags;         /* 0x08 */
129        uint8_t  unused2;               /* 0x09 */
130        uint16_t orig_video_ega_bx;/* 0x0a */
131        uint16_t unused3;               /* 0x0c */
132        uint8_t  orig_video_lines;      /* 0x0e */
133        uint8_t  orig_video_isVGA;      /* 0x0f */
134        uint16_t orig_video_points;/* 0x10 */
135
136        /* VESA graphic mode -- linear frame buffer */
137        uint16_t lfb_width;     /* 0x12 */
138        uint16_t lfb_height;    /* 0x14 */
139        uint16_t lfb_depth;     /* 0x16 */
140        uint32_t lfb_base;              /* 0x18 */
141        uint32_t lfb_size;              /* 0x1c */
142        uint16_t cl_magic, cl_offset; /* 0x20 */
143        uint16_t lfb_linelength;        /* 0x24 */
144        uint8_t  red_size;              /* 0x26 */
145        uint8_t  red_pos;               /* 0x27 */
146        uint8_t  green_size;    /* 0x28 */
147        uint8_t  green_pos;     /* 0x29 */
148        uint8_t  blue_size;     /* 0x2a */
149        uint8_t  blue_pos;              /* 0x2b */
150        uint8_t  rsvd_size;     /* 0x2c */
151        uint8_t  rsvd_pos;              /* 0x2d */
152        uint16_t vesapm_seg;    /* 0x2e */
153        uint16_t vesapm_off;    /* 0x30 */
154        uint16_t pages;         /* 0x32 */
155        uint16_t vesa_attributes;       /* 0x34 */
156        uint32_t capabilities;     /* 0x36 */
157        uint8_t  _reserved[6];  /* 0x3a */
158} __packed;
159
160int syslinux_boot_linux(void *kernel_buf, size_t kernel_size,
161                        struct initramfs *initramfs,
162                        struct setup_data *setup_data,
163                        char *cmdline);
164
165/* Initramfs manipulation functions */
166
167struct initramfs *initramfs_init(void);
168int initramfs_add_data(struct initramfs *ihead, const void *data,
169                       size_t data_len, size_t len, size_t align);
170int initramfs_mknod(struct initramfs *ihead, const char *filename,
171                    int do_mkdir,
172                    uint16_t mode, size_t len, uint32_t major, uint32_t minor);
173int initramfs_add_file(struct initramfs *ihead, const void *data,
174                       size_t data_len, size_t len,
175                       const char *filename, int do_mkdir, uint32_t mode);
176int initramfs_load_file(struct initramfs *ihead, const char *src_filename,
177                        const char *dst_filename, int do_mkdir, uint32_t mode);
178int initramfs_add_trailer(struct initramfs *ihead);
179int initramfs_load_archive(struct initramfs *ihead, const char *filename);
180
181/* Get the combined size of the initramfs */
182static inline uint32_t initramfs_size(struct initramfs *initramfs)
183{
184    struct initramfs *ip;
185    uint32_t size = 0;
186
187    if (!initramfs)
188        return 0;
189
190    for (ip = initramfs->next; ip->len; ip = ip->next) {
191        size = (size + ip->align - 1) & ~(ip->align - 1);       /* Alignment */
192        size += ip->len;
193    }
194
195    return size;
196}
197
198/* Setup data manipulation functions */
199
200struct setup_data *setup_data_init(void);
201int setup_data_add(struct setup_data *head, uint32_t type,
202                   const void *data, size_t data_len);
203int setup_data_load(struct setup_data *head, uint32_t type,
204                    const char *filename);
205
206#endif /* _SYSLINUX_LINUX_H */
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