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6926e2699a
Add missing logic to allow in-kernel VFP usage for ARMv7 NEON. The implementation is strongly based on arm64 code. It introduces a family of fpu_kern_* functions to enable the usage of VFP instructions in kernel. Apart from that the existing armv7 VFP logic was modified, taking into account that the state of the VFP registers can now be modified in the kernel. Co-developed by: Wojciech Macek <wma@FreeBSD.org> Sponsored by: Stormshield Obtained from: Semihalf Reviewed by: andrew Differential Revision: https://reviews.freebsd.org/D37419
94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/* $NetBSD: pcb.h,v 1.10 2003/10/13 21:46:39 scw Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 2001 Matt Thomas <matt@3am-software.com>.
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* Copyright (c) 1994 Mark Brinicombe.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the RiscBSD team.
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* 4. The name "RiscBSD" nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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_PCB_H_
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#define _MACHINE_PCB_H_
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#include <machine/frame.h>
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#include <machine/vfp.h>
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/*
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* WARNING!
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* Keep pcb_regs first for faster access in switch.S
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*/
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struct pcb {
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struct switchframe pcb_regs; /* CPU state */
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u_int pcb_flags;
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#define PCB_OWNFPU 0x00000001
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#define PCB_NOALIGNFLT 0x00000002
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caddr_t pcb_onfault; /* On fault handler */
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vm_offset_t pcb_pagedir; /* TTB0 value */
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/*
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* XXX:
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* Variables pcb_pl1vec, pcb_l1vec, pcb_dacr are used solely
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* by old PMAP. Keep them here for PCB binary compatibility
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* between old and new PMAP.
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*/
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uint32_t *pcb_pl1vec; /* PTR to vector_base L1 entry*/
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uint32_t pcb_l1vec; /* Value to stuff on ctx sw */
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u_int pcb_dacr; /* Domain Access Control Reg */
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struct vfp_state pcb_vfpstate; /* VP/NEON state */
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u_int pcb_vfpcpu; /* VP/NEON last cpu */
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#define PCB_FP_STARTED 0x01
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#define PCB_FP_KERN 0x02
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#define PCB_FP_NOSAVE 0x04
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struct vfp_state *pcb_vfpsaved; /* VP/NEON state */
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int pcb_fpflags;
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} __aligned(8); /*
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* We need the PCB to be aligned on 8 bytes, as we may
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* access it using ldrd/strd, and ARM ABI require it
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* to by aligned on 8 bytes.
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*/
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/*
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* No additional data for core dumps.
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*/
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struct md_coredump {
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int md_empty;
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};
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void makectx(struct trapframe *tf, struct pcb *pcb);
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#ifdef _KERNEL
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void savectx(struct pcb *) __returns_twice;
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#endif /* _KERNEL */
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#endif /* !_MACHINE_PCB_H_ */
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