d2ae03bae2
On some hardware, we can't clear HCR_EL2.E2H so accesses to the physical timer hopelessly trap to EL2. Stash off the value of HCR_EL2 and use it in has_hyp() to avoid this. Reviewed by: andrew Differential Revision: https://reviews.freebsd.org/D38884
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/*-
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* Copyright (c) 2013 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 _MACHINE_MACHDEP_H_
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#define _MACHINE_MACHDEP_H_
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#ifdef _KERNEL
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struct arm64_bootparams {
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vm_offset_t modulep;
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uint64_t kern_delta;
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vm_offset_t kern_stack;
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vm_paddr_t kern_ttbr0;
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uint64_t hcr_el2;
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int boot_el; /* EL the kernel booted from */
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int pad;
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};
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enum arm64_bus {
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ARM64_BUS_NONE,
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ARM64_BUS_FDT,
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ARM64_BUS_ACPI,
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};
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extern enum arm64_bus arm64_bus_method;
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void dbg_init(void);
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bool has_hyp(void);
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void initarm(struct arm64_bootparams *);
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vm_offset_t parse_boot_param(struct arm64_bootparams *abp);
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#ifdef FDT
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void parse_fdt_bootargs(void);
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#endif
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int memory_mapping_mode(vm_paddr_t pa);
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extern void (*pagezero)(void *);
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#ifdef SOCDEV_PA
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/*
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* The virtual address SOCDEV_PA is mapped at.
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* Only valid while the early pagetables are valid.
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*/
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extern uintptr_t socdev_va;
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#endif
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#endif /* _KERNEL */
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#endif /* _MACHINE_MACHDEP_H_ */
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