7bd249ecf0
This builds on the modular EFI loader support added r294060 adding a module to provide ZFS boot support on EFI systems. It should be noted that EFI uses a fixed size memory block for all allocations performed by the loader so it may be necessary to tune this size. For example when building an image which uses mfs_root e.g. mfsbsd, adding the following to /etc/make.conf would be needed to prevent EFI from running out of memory when loading the mfs_root image. EFI_STAGING_SIZE=128 Submitted by: Eric McCorkle MFC after: 2 weeks X-MFC-With: r293268 Sponsored by: Multiplay
114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*-
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* Copyright (c) 2015 Eric McCorkle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _BOOT_MODULE_H_
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#define _BOOT_MODULE_H_
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#include <stdbool.h>
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#include <efi.h>
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#include <efilib.h>
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#include <eficonsctl.h>
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#ifdef EFI_DEBUG
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#define DPRINTF(fmt, args...) \
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do { \
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printf(fmt, ##args) \
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} while (0)
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#else
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#define DPRINTF(fmt, args...) {}
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#endif
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/* EFI device info */
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typedef struct dev_info
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{
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EFI_BLOCK_IO *dev;
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EFI_DEVICE_PATH *devpath;
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EFI_HANDLE *devhandle;
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void *devdata;
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struct dev_info *next;
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} dev_info_t;
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/*
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* A boot loader module.
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*
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* This is a standard interface for filesystem modules in the EFI system.
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*/
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typedef struct boot_module_t
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{
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const char *name;
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/* init is the optional initialiser for the module. */
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void (*init)();
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/*
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* probe checks to see if the module can handle dev.
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*
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* Return codes:
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* EFI_SUCCESS = The module can handle the device.
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* EFI_NOT_FOUND = The module can not handle the device.
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* Other = The module encountered an error.
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*/
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EFI_STATUS (*probe)(dev_info_t* dev);
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/*
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* load should select the best out of a set of devices that probe
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* indicated were loadable and load it.
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*
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* Return codes:
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* EFI_SUCCESS = The module can handle the device.
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* EFI_NOT_FOUND = The module can not handle the device.
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* Other = The module encountered an error.
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*/
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EFI_STATUS (*load)(const char *loader_path, dev_info_t **devinfo,
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void **buf, size_t *bufsize);
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/* status outputs information about the probed devices. */
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void (*status)();
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} boot_module_t;
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/* Standard boot modules. */
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#ifdef EFI_UFS_BOOT
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extern const boot_module_t ufs_module;
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#endif
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#ifdef EFI_ZFS_BOOT
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extern const boot_module_t zfs_module;
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#endif
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/* Functions available to modules. */
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extern void add_device(dev_info_t **devinfop, dev_info_t *devinfo);
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extern void panic(const char *fmt, ...) __dead2;
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extern int printf(const char *fmt, ...);
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extern int vsnprintf(char *str, size_t sz, const char *fmt, va_list ap);
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extern EFI_SYSTEM_TABLE *systab;
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extern EFI_BOOT_SERVICES *bs;
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#endif
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