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/*
* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*/
/*
* This is an interface that we can boot from. It provides a function to start
* up the peripheral and also one to scan for available devices attached to
* this peripheral.
*/
struct boot_interface {
const char *name;
int type; /* IF_TYPE... from part.h */
/**
* Start the peripheral interface, so we are ready to scan for
* devices. This function can return 0 if it knows that there is
* no need to scan. If it returns 1 or more, then a scan will
* started.
*
* @param flags Flags for this disk: VB_DISK_FLAG_...
* @return 0 if no devices, >=1 if we have devices, -1 on error
*/
int (*start)(uint32_t flags);
/**
* Scan this peripheral for available devices
*
* @param desc Array to put available devices into
* @param max_devs Maximum number of devices to return
* @param flags Flags for this disk: VB_DISK_FLAG_...
* @return number of devices found, or -1 on error
*/
int (*scan)(block_dev_desc_t **desc, int max_devs, uint32_t flags);
};
/**
* Register a new boot interface.
*
* @param iface The interface to register
* @return 0 if ok, -1 on error
*/
int boot_device_register_interface(struct boot_interface *iface);
/**
* Checks if a given device matches the provided disk_flags.
*
* @param dev Device to check
* @param disk_flags Disk flags which must be present for this device
* @param flags Returns calculated flags for this device
* @return 1 if the device matches, 0 if not
*/
int boot_device_matches(const block_dev_desc_t *dev, uint32_t disk_flags,
uint32_t *flags);
/**
* Probe functions for available interfaces
*
* @return 0 if ok, -1 on error
*/
int boot_device_usb_probe(void);
int boot_device_mmc_probe(void);
int boot_device_ide_probe(void);
int boot_device_scsi_probe(void);
/**
* Register all the available boot devices.
*
* @return 0 if ok, -1 on error
*/
int boot_device_init(void);
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