cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dsp.h (1747B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * Copyright (C) 2005 Mips Technologies
      4 * Author: Chris Dearman, chris@mips.com derived from fpu.h
      5 */
      6#ifndef _ASM_DSP_H
      7#define _ASM_DSP_H
      8
      9#include <asm/cpu.h>
     10#include <asm/cpu-features.h>
     11#include <asm/hazards.h>
     12#include <asm/mipsregs.h>
     13
     14#define DSP_DEFAULT	0x00000000
     15#define DSP_MASK	0x3f
     16
     17#define __enable_dsp_hazard()						\
     18do {									\
     19	asm("_ehb");							\
     20} while (0)
     21
     22static inline void __init_dsp(void)
     23{
     24	mthi1(0);
     25	mtlo1(0);
     26	mthi2(0);
     27	mtlo2(0);
     28	mthi3(0);
     29	mtlo3(0);
     30	wrdsp(DSP_DEFAULT, DSP_MASK);
     31}
     32
     33static inline void init_dsp(void)
     34{
     35	if (cpu_has_dsp)
     36		__init_dsp();
     37}
     38
     39#define __save_dsp(tsk)							\
     40do {									\
     41	tsk->thread.dsp.dspr[0] = mfhi1();				\
     42	tsk->thread.dsp.dspr[1] = mflo1();				\
     43	tsk->thread.dsp.dspr[2] = mfhi2();				\
     44	tsk->thread.dsp.dspr[3] = mflo2();				\
     45	tsk->thread.dsp.dspr[4] = mfhi3();				\
     46	tsk->thread.dsp.dspr[5] = mflo3();				\
     47	tsk->thread.dsp.dspcontrol = rddsp(DSP_MASK);			\
     48} while (0)
     49
     50#define save_dsp(tsk)							\
     51do {									\
     52	if (cpu_has_dsp)						\
     53		__save_dsp(tsk);					\
     54} while (0)
     55
     56#define __restore_dsp(tsk)						\
     57do {									\
     58	mthi1(tsk->thread.dsp.dspr[0]);					\
     59	mtlo1(tsk->thread.dsp.dspr[1]);					\
     60	mthi2(tsk->thread.dsp.dspr[2]);					\
     61	mtlo2(tsk->thread.dsp.dspr[3]);					\
     62	mthi3(tsk->thread.dsp.dspr[4]);					\
     63	mtlo3(tsk->thread.dsp.dspr[5]);					\
     64	wrdsp(tsk->thread.dsp.dspcontrol, DSP_MASK);			\
     65} while (0)
     66
     67#define restore_dsp(tsk)						\
     68do {									\
     69	if (cpu_has_dsp)						\
     70		__restore_dsp(tsk);					\
     71} while (0)
     72
     73#define __get_dsp_regs(tsk)						\
     74({									\
     75	if (tsk == current)						\
     76		__save_dsp(current);					\
     77									\
     78	tsk->thread.dsp.dspr;						\
     79})
     80
     81#endif /* _ASM_DSP_H */