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 47 struct 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 56 struct setup_data_header { 57 uint64_t next; 58 uint32_t type; 59 uint32_t len; 60 } __packed; 61 62 struct 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 77 struct 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; 120 121 struct 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; 159 160 int 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 */ 166 167 struct initramfs *initramfs_init(void); 168 int initramfs_add_data(struct initramfs *ihead, const void *data, 169 size_t data_len, size_t len, size_t align); 170 int 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); 173 int 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); 176 int initramfs_load_file(struct initramfs *ihead, const char *src_filename, 177 const char *dst_filename, int do_mkdir, uint32_t mode); 178 int initramfs_add_trailer(struct initramfs *ihead); 179 int initramfs_load_archive(struct initramfs *ihead, const char *filename); 180 181 /* Get the combined size of the initramfs */ 182 static 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 */ 199 200 struct setup_data *setup_data_init(void); 201 int setup_data_add(struct setup_data *head, uint32_t type, 202 const void *data, size_t data_len); 203 int setup_data_load(struct setup_data *head, uint32_t type, 204 const char *filename); 205 206 #endif /* _SYSLINUX_LINUX_H */ 207
