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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misc_44x.S (533B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * This file contains miscellaneous low-level functions for PPC 44x.
      4 *    Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
      5 */
      6
      7#include <asm/reg.h>
      8#include <asm/ppc_asm.h>
      9
     10	.text
     11
     12/*
     13 * Do an IO access in AS1
     14 */
     15_GLOBAL(as1_readb)
     16	mfmsr	r7
     17	ori	r0,r7,MSR_DS
     18	sync
     19	mtmsr	r0
     20	sync
     21	isync
     22	lbz	r3,0(r3)
     23	sync
     24	mtmsr	r7
     25	sync
     26	isync
     27	blr
     28
     29_GLOBAL(as1_writeb)
     30	mfmsr	r7
     31	ori	r0,r7,MSR_DS
     32	sync
     33	mtmsr	r0
     34	sync
     35	isync
     36	stb	r3,0(r4)
     37	sync
     38	mtmsr	r7
     39	sync
     40	isync
     41	blr