freebsd-dev/sys/arm64/include/machdep.h
Andrew Turner 698c14e189 Add a kernel variable to let the user to select their preferred order
between ACPI and FDT. This will be needed on machines with both, e.g. the
SoftIron Overdrive 3000. The kernel will accept one or more comma separated
values of either 'acpi' or 'fdt'. Any other values are skipped.

To set it the user can either set it on the loader command line, or
in loader.conf e.g. in loader.conf:
kern.cfg.order=acpi,fdt

This will try using ACPI then FDT. If none of the selected options work the
kernel tries to use one to get the serial console, then panics.

Reviewed by:	emaste (earlier version)
Obtained from:	ABT Systems Ltd
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D7274
2016-08-01 12:17:44 +00:00

55 lines
1.9 KiB
C

/*-
* Copyright (c) 2013 Andrew Turner <andrew@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MACHINE_MACHDEP_H_
#define _MACHINE_MACHDEP_H_
struct arm64_bootparams {
vm_offset_t modulep;
vm_offset_t kern_l1pt; /* L1 page table for the kernel */
uint64_t kern_delta;
vm_offset_t kern_stack;
vm_offset_t kern_l0pt; /* L1 page table for the kernel */
};
enum arm64_bus {
ARM64_BUS_NONE,
ARM64_BUS_FDT,
ARM64_BUS_ACPI,
};
extern enum arm64_bus arm64_bus_method;
extern vm_paddr_t physmap[];
extern u_int physmap_idx;
void initarm(struct arm64_bootparams *);
extern void (*pagezero)(void *);
#endif /* _MACHINE_MACHDEP_H_ */