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a6662c37b6
Summary: Provide an implementation of fpu_kern_enter/fpu_kern_leave for PPC to enable FPU, VSX, and Altivec usage in-kernel. The functions currently only support FPU_KERN_NOCTX, but this is sufficient for ossl(1) and many other users of the API. This patchset has been tested on powerpc64le using a modified version of the in-tree tools/tools/crypto/cryptocheck.c tool to check for FPU/Vec register clobbering along with a follow-up patch to enable ossl(4) on powerpc64*. Reviewed by: jhibbits MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D41540
138 lines
4.3 KiB
C
138 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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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 TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: pcb.h,v 1.4 2000/06/04 11:57:17 tsubai Exp $
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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 <sys/endian.h>
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#include <machine/setjmp.h>
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#ifndef _STANDALONE
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struct pcb {
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register_t pcb_context[20]; /* non-volatile r12-r31 */
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register_t pcb_cr; /* Condition register */
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register_t pcb_sp; /* stack pointer */
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register_t pcb_toc; /* toc pointer */
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register_t pcb_lr; /* link register */
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register_t pcb_dscr; /* dscr value */
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register_t pcb_fscr;
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register_t pcb_tar;
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struct pmap *pcb_pm; /* pmap of our vmspace */
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jmp_buf *pcb_onfault; /* For use during
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copyin/copyout */
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int pcb_flags;
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#define PCB_FPU 0x1 /* Process uses FPU */
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#define PCB_FPREGS 0x2 /* Process had FPU registers initialized */
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#define PCB_VEC 0x4 /* Process uses Altivec */
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#define PCB_VSX 0x8 /* Process had VSX initialized */
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#define PCB_CDSCR 0x10 /* Process had Custom DSCR initialized */
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#define PCB_HTM 0x20 /* Process had HTM initialized */
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#define PCB_CFSCR 0x40 /* Process had FSCR updated */
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#define PCB_KERN_FPU 0x80 /* Kernel is using FPU/Vector unit */
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#define PCB_KERN_FPU_NOSAVE 0x100 /* FPU/Vec state not saved for kernel use */
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#define PCB_VECREGS 0x200 /* Process had Altivec registers initialized */
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struct fpu {
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union {
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#if _BYTE_ORDER == _BIG_ENDIAN
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double fpr;
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uint32_t vsr[4];
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#else
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uint32_t vsr[4];
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struct {
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double padding;
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double fpr;
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};
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#endif
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} fpr[32];
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double fpscr; /* FPSCR stored as double for easier access */
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} pcb_fpu; /* Floating point processor */
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unsigned int pcb_fpcpu; /* which CPU had our FPU
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stuff. */
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struct vec {
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uint32_t vr[32][4];
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uint32_t spare[2];
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uint32_t vrsave;
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uint32_t vscr; /* aligned at vector element 3 */
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} pcb_vec __aligned(16); /* Vector processor */
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unsigned int pcb_veccpu; /* which CPU had our vector
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stuff. */
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struct htm {
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uint64_t tfhar;
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uint64_t texasr;
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uint64_t tfiar;
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} pcb_htm;
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struct ebb {
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uint64_t ebbhr;
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uint64_t ebbrr;
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uint64_t bescr;
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} pcb_ebb;
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struct lmon {
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uint64_t lmrr;
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uint64_t lmser;
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} pcb_lm;
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union {
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struct {
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vm_offset_t usr_segm; /* Base address */
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register_t usr_vsid; /* USER_SR segment */
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} aim;
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struct {
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register_t dbcr0;
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} booke;
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} pcb_cpu;
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vm_offset_t pcb_lastill; /* Last illegal instruction */
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};
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#endif
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#ifdef _KERNEL
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struct trapframe;
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#ifndef curpcb
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extern struct pcb *curpcb;
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#endif
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extern struct pmap *curpm;
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extern struct proc *fpuproc;
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void makectx(struct trapframe *, struct pcb *);
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void savectx(struct pcb *) __returns_twice;
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#endif
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#endif /* _MACHINE_PCB_H_ */
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