591e79bc76
Add support for early boot access to NVRAM variables, using a new bhnd_nvram_data_getvar_direct() API to support zero-allocation direct reading of NVRAM variables from a bhnd_nvram_io instance backed by the CFE NVRAM device. Approved by: adrian (mentor) Differential Revision: https://reviews.freebsd.org/D9913
68 lines
2.4 KiB
C
68 lines
2.4 KiB
C
/*-
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* Copyright (c) 2015-2016 Landon Fuller <landonf@FreeBSD.org>
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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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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*
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* $FreeBSD$
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*/
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#ifndef _MIPS_BROADCOM_BCM_NVRAM_CFE_H_
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#define _MIPS_BROADCOM_BCM_NVRAM_CFE_H_
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <dev/bhnd/nvram/bhnd_nvram.h>
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#include <dev/bhnd/nvram/bhnd_nvram_iovar.h>
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#include <dev/bhnd/nvram/bhnd_nvram_store.h>
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struct bcm_nvram_iocfe;
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int bcm_nvram_find_cfedev(struct bcm_nvram_iocfe *iocfe,
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bhnd_nvram_data_class **cls);
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/**
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* CFE-backed bhnd_nvram_io implementation.
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*/
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struct bcm_nvram_iocfe {
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struct bhnd_nvram_io io; /**< common I/O instance state */
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char *dname; /**< CFE device name (borrowed) */
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int fd; /**< CFE file descriptor */
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size_t offset; /**< base offset */
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size_t size; /**< device size */
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bool req_blk_erase; /**< flash blocks must be erased
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before writing */
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};
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/** bhnd_nvram_cfe driver instance state. */
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struct bhnd_nvram_cfe_softc {
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device_t dev;
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struct bhnd_nvram_store *store; /**< nvram store */
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};
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#endif /* _MIPS_BROADCOM_BCM_NVRAM_CFE_H_ */
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