boot_module.h revision 344374
1/*- 2 * Copyright (c) 2015 Eric McCorkle 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: stable/11/stand/efi/boot1/boot_module.h 344374 2019-02-20 18:46:31Z kevans $ 27 */ 28 29#ifndef _BOOT_MODULE_H_ 30#define _BOOT_MODULE_H_ 31 32#include <stdbool.h> 33 34#include <efi.h> 35#include <efilib.h> 36#include <eficonsctl.h> 37 38#ifdef EFI_DEBUG 39#define DPRINTF(fmt, args...) printf(fmt, ##args) 40#define DSTALL(d) BS->Stall(d) 41#else 42#define DPRINTF(fmt, ...) {} 43#define DSTALL(d) {} 44#endif 45 46/* EFI device info */ 47typedef struct dev_info 48{ 49 EFI_BLOCK_IO *dev; 50 EFI_DEVICE_PATH *devpath; 51 EFI_HANDLE *devhandle; 52 void *devdata; 53 uint64_t partoff; 54 int preferred; 55 struct dev_info *next; 56} dev_info_t; 57 58/* 59 * A boot loader module. 60 * 61 * This is a standard interface for filesystem modules in the EFI system. 62 */ 63typedef struct boot_module_t 64{ 65 const char *name; 66 67 /* init is the optional initialiser for the module. */ 68 void (*init)(void); 69 70 /* 71 * probe checks to see if the module can handle dev. 72 * 73 * Return codes: 74 * EFI_SUCCESS = The module can handle the device. 75 * EFI_NOT_FOUND = The module can not handle the device. 76 * Other = The module encountered an error. 77 */ 78 EFI_STATUS (*probe)(dev_info_t* dev); 79 80 /* 81 * load should select the best out of a set of devices that probe 82 * indicated were loadable and load the specified file. 83 * 84 * Return codes: 85 * EFI_SUCCESS = The module can handle the device. 86 * EFI_NOT_FOUND = The module can not handle the device. 87 * Other = The module encountered an error. 88 */ 89 EFI_STATUS (*load)(const char *filepath, dev_info_t *devinfo, 90 void **buf, size_t *bufsize); 91 92 /* status outputs information about the probed devices. */ 93 void (*status)(void); 94 95 /* valid devices as found by probe. */ 96 dev_info_t *(*devices)(void); 97} boot_module_t; 98 99/* Standard boot modules. */ 100#ifdef EFI_UFS_BOOT 101extern const boot_module_t ufs_module; 102#endif 103#ifdef EFI_ZFS_BOOT 104extern const boot_module_t zfs_module; 105#endif 106 107/* Functions available to modules. */ 108extern void add_device(dev_info_t **devinfop, dev_info_t *devinfo); 109extern int vsnprintf(char *str, size_t sz, const char *fmt, va_list ap); 110#endif 111