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