207 lines
6.3 KiB
C
207 lines
6.3 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 2007-2008 H. Peter Anvin - All Rights Reserved
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* Copyright 2012 Intel Corporation; author: H. Peter Anvin
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall
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* be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* syslinux/linux.h
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*
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* Definitions used to boot a Linux kernel
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*/
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#ifndef _SYSLINUX_LINUX_H
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#define _SYSLINUX_LINUX_H
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#include <stddef.h>
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#include <stdint.h>
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#include <klibc/compiler.h>
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/* A chunk of an initramfs. These are kept as a doubly-linked
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circular list with headnode; the headnode is distinguished by
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having len == 0. The data pointer can be NULL if data_len is zero;
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if data_len < len then the balance of the region is zeroed. */
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struct initramfs {
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struct initramfs *prev, *next;
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size_t len;
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size_t align;
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const void *data;
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size_t data_len;
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};
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#define INITRAMFS_MAX_ALIGN 4096
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struct setup_data_header {
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uint64_t next;
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uint32_t type;
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uint32_t len;
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} __packed;
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struct setup_data {
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struct setup_data *prev, *next;
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const void *data;
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struct setup_data_header hdr;
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};
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#define SETUP_NONE 0
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#define SETUP_E820_EXT 1
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#define SETUP_DTB 2
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#define XLF_KERNEL_64 (1 << 0)
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#define XLF_CAN_BE_LOADED_ABOVE_4G (1 << 1)
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#define XLF_EFI_HANDOVER_32 (1 << 2)
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#define XLF_EFI_HANDOVER_64 (1 << 3)
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struct linux_header {
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uint8_t boot_sector_1[0x0020];
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uint16_t old_cmd_line_magic;
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uint16_t old_cmd_line_offset;
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uint8_t boot_sector_2[0x01f1 - 0x0024];
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uint8_t setup_sects;
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uint16_t root_flags;
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uint32_t syssize;
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uint16_t ram_size;
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uint16_t vid_mode;
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uint16_t root_dev;
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uint16_t boot_flag;
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uint16_t jump;
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uint32_t header;
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uint16_t version;
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uint32_t realmode_swtch;
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uint16_t start_sys;
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uint16_t kernel_version;
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uint8_t type_of_loader;
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uint8_t loadflags;
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uint16_t setup_move_size;
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uint32_t code32_start;
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uint32_t ramdisk_image;
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uint32_t ramdisk_size;
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uint32_t bootsect_kludge;
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uint16_t heap_end_ptr;
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uint16_t pad1;
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uint32_t cmd_line_ptr;
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uint32_t initrd_addr_max;
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uint32_t kernel_alignment;
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uint8_t relocatable_kernel;
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uint8_t min_alignment;
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uint16_t xloadflags;
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uint32_t cmdline_max_len;
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uint32_t hardware_subarch;
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uint64_t hardware_subarch_data;
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uint32_t payload_offset;
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uint32_t payload_length;
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uint64_t setup_data;
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uint64_t pref_address;
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uint32_t init_size;
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uint32_t handover_offset;
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} __packed;
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struct screen_info {
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uint8_t orig_x; /* 0x00 */
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uint8_t orig_y; /* 0x01 */
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uint16_t ext_mem_k; /* 0x02 */
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uint16_t orig_video_page; /* 0x04 */
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uint8_t orig_video_mode; /* 0x06 */
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uint8_t orig_video_cols; /* 0x07 */
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uint8_t flags; /* 0x08 */
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uint8_t unused2; /* 0x09 */
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uint16_t orig_video_ega_bx;/* 0x0a */
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uint16_t unused3; /* 0x0c */
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uint8_t orig_video_lines; /* 0x0e */
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uint8_t orig_video_isVGA; /* 0x0f */
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uint16_t orig_video_points;/* 0x10 */
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/* VESA graphic mode -- linear frame buffer */
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uint16_t lfb_width; /* 0x12 */
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uint16_t lfb_height; /* 0x14 */
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uint16_t lfb_depth; /* 0x16 */
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uint32_t lfb_base; /* 0x18 */
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uint32_t lfb_size; /* 0x1c */
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uint16_t cl_magic, cl_offset; /* 0x20 */
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uint16_t lfb_linelength; /* 0x24 */
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uint8_t red_size; /* 0x26 */
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uint8_t red_pos; /* 0x27 */
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uint8_t green_size; /* 0x28 */
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uint8_t green_pos; /* 0x29 */
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uint8_t blue_size; /* 0x2a */
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uint8_t blue_pos; /* 0x2b */
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uint8_t rsvd_size; /* 0x2c */
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uint8_t rsvd_pos; /* 0x2d */
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uint16_t vesapm_seg; /* 0x2e */
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uint16_t vesapm_off; /* 0x30 */
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uint16_t pages; /* 0x32 */
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uint16_t vesa_attributes; /* 0x34 */
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uint32_t capabilities; /* 0x36 */
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uint8_t _reserved[6]; /* 0x3a */
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} __packed;
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int syslinux_boot_linux(void *kernel_buf, size_t kernel_size,
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struct initramfs *initramfs,
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struct setup_data *setup_data,
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char *cmdline);
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/* Initramfs manipulation functions */
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struct initramfs *initramfs_init(void);
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int initramfs_add_data(struct initramfs *ihead, const void *data,
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size_t data_len, size_t len, size_t align);
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int initramfs_mknod(struct initramfs *ihead, const char *filename,
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int do_mkdir,
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uint16_t mode, size_t len, uint32_t major, uint32_t minor);
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int initramfs_add_file(struct initramfs *ihead, const void *data,
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size_t data_len, size_t len,
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const char *filename, int do_mkdir, uint32_t mode);
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int initramfs_load_file(struct initramfs *ihead, const char *src_filename,
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const char *dst_filename, int do_mkdir, uint32_t mode);
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int initramfs_add_trailer(struct initramfs *ihead);
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int initramfs_load_archive(struct initramfs *ihead, const char *filename);
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/* Get the combined size of the initramfs */
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static inline uint32_t initramfs_size(struct initramfs *initramfs)
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{
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struct initramfs *ip;
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uint32_t size = 0;
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if (!initramfs)
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return 0;
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for (ip = initramfs->next; ip->len; ip = ip->next) {
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size = (size + ip->align - 1) & ~(ip->align - 1); /* Alignment */
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size += ip->len;
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}
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return size;
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}
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/* Setup data manipulation functions */
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struct setup_data *setup_data_init(void);
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int setup_data_add(struct setup_data *head, uint32_t type,
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const void *data, size_t data_len);
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int setup_data_load(struct setup_data *head, uint32_t type,
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const char *filename);
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#endif /* _SYSLINUX_LINUX_H */
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