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This should have been done as part of r327350, but due to lack of foresight it came later. In the different places we apply overlays, we duplicate the bits that check for fdt_overlays in the environment and supplement that with any other places we need to check for overlays to load. These "other places" will be loader specific and are not candidates for consolidation. Provide an fdt_load_dtb_overlays to capture the common logic, allow passing in an additional list of overlays to be loaded. This additional list of overlays is used in practice for ubldr to pull in any fdt_overlays passed to it from U-Boot environment, but it can be used for any other source of overlays. These additional overlays supplement loader.conf(5) fdt_overlays, rather than replace, so that we're not restricted to specifying overlays in only one place. This is a change from previous behavior where loader.conf(5) supplied fdt_overlays would cause us to ignore U-Boot environment, and this seems nonsensical- user should have sufficient control over both of these aspects, or lack of control for good reasons. A knob could be considered in the future to ignore U-Boot supplied overlays, but the supplemental treatment seems like a good start. Reviewed by: imp (earlier version), gonzo (earlier version) Differential Revision: https://reviews.freebsd.org/D13993
57 lines
2.1 KiB
C
57 lines
2.1 KiB
C
/*-
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* Copyright (c) 2014 Andrew Turner <andrew@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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* 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 FDT_PLATFORM_H
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#define FDT_PLATFORM_H
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struct fdt_header;
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struct fdt_mem_region {
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unsigned long start;
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unsigned long size;
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};
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#define TMP_MAX_ETH 8
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int fdt_copy(vm_offset_t);
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void fdt_fixup_cpubusfreqs(unsigned long, unsigned long);
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void fdt_fixup_ethernet(const char *, char *, int);
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void fdt_fixup_memory(struct fdt_mem_region *, size_t);
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void fdt_fixup_stdout(const char *);
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void fdt_apply_overlays(void);
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int fdt_load_dtb_addr(struct fdt_header *);
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int fdt_load_dtb_file(const char *);
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void fdt_load_dtb_overlays(const char *);
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int fdt_setup_fdtp(void);
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/* The platform library needs to implement these functions */
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int fdt_platform_load_dtb(void);
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void fdt_platform_fixups(void);
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#endif /* FDT_PLATFORM_H */
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