linux.h

/*
 * stubby
 *
 * Copyright (c) 2020 Cisco Systems, Inc. <pmoore2@cisco.com>
 *
 * This file was originally copied from systemd under the LGPL-2.1+ license
 * and that license has been preserved in this project.  The systemd source
 * repository can be found at https://github.com/systemd/systemd.
 *
 */

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

#ifndef __STUBBY_LINUX_H
#define __STUBBY_LINUX_H

#define SETUP_MAGIC             0x53726448      /* "HdrS" */

struct setup_header {
	UINT8  setup_sects;
	UINT16 root_flags;
	UINT32 syssize;
	UINT16 ram_size;
	UINT16 vid_mode;
	UINT16 root_dev;
	UINT16 boot_flag;
	UINT16 jump;
	UINT32 header;
	UINT16 version;
	UINT32 realmode_swtch;
	UINT16 start_sys_seg;
	UINT16 kernel_version;
	UINT8  type_of_loader;
	UINT8  loadflags;
	UINT16 setup_move_size;
	UINT32 code32_start;
	UINT32 ramdisk_image;
	UINT32 ramdisk_size;
	UINT32 bootsect_kludge;
	UINT16 heap_end_ptr;
	UINT8  ext_loader_ver;
	UINT8  ext_loader_type;
	UINT32 cmd_line_ptr;
	UINT32 initrd_addr_max;
	UINT32 kernel_alignment;
	UINT8  relocatable_kernel;
	UINT8  min_alignment;
	UINT16 xloadflags;
	UINT32 cmdline_size;
	UINT32 hardware_subarch;
	UINT64 hardware_subarch_data;
	UINT32 payload_offset;
	UINT32 payload_length;
	UINT64 setup_data;
	UINT64 pref_address;
	UINT32 init_size;
	UINT32 handover_offset;
} __attribute__((packed));

/* adapted from linux' bootparam.h */
struct boot_params {
	UINT8  screen_info[64];
	UINT8  apm_bios_info[20];
	UINT8  _pad2[4];
	UINT64 tboot_addr;
	UINT8  ist_info[16];
	UINT8  _pad3[16];
	UINT8  hd0_info[16];
	UINT8  hd1_info[16];
	UINT8  sys_desc_table[16];
	UINT8  olpc_ofw_header[16];
	UINT32 ext_ramdisk_image;
	UINT32 ext_ramdisk_size;
	UINT32 ext_cmd_line_ptr;
	UINT8  _pad4[116];
	UINT8  edid_info[128];
	UINT8  efi_info[32];
	UINT32 alt_mem_k;
	UINT32 scratch;
	UINT8  e820_entries;
	UINT8  eddbuf_entries;
	UINT8  edd_mbr_sig_buf_entries;
	UINT8  kbd_status;
	UINT8  secure_boot;
	UINT8  _pad5[2];
	UINT8  sentinel;
	UINT8  _pad6[1];
	struct setup_header hdr;
	UINT8  _pad7[0x290 - 0x1f1 - sizeof(struct setup_header)];
	UINT32 edd_mbr_sig_buffer[16];
	UINT8  e820_table[20 * 128];
	UINT8  _pad8[48];
	UINT8  eddbuf[6 * 82];
	UINT8  _pad9[276];
} __attribute__((packed));

EFI_STATUS linux_exec(EFI_HANDLE *image,
		      CHAR8 *cmdline, UINTN cmdline_size,
		      UINTN linux_addr,
		      UINTN initrd_addr, UINTN initrd_size);

#endif