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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NG4copy_page.S (1552B)


      1/* SPDX-License-Identifier: GPL-2.0 */
      2/* NG4copy_page.S: Niagara-4 optimized copy page.
      3 *
      4 * Copyright (C) 2012 (davem@davemloft.net)
      5 */
      6
      7#include <asm/asi.h>
      8#include <asm/page.h>
      9
     10	.text
     11	.align		32
     12
     13	.register	%g2, #scratch
     14	.register	%g3, #scratch
     15
     16	.globl		NG4copy_user_page
     17NG4copy_user_page:	/* %o0=dest, %o1=src, %o2=vaddr */
     18	prefetch	[%o1 + 0x000], #n_reads_strong
     19	prefetch	[%o1 + 0x040], #n_reads_strong
     20	prefetch	[%o1 + 0x080], #n_reads_strong
     21	prefetch	[%o1 + 0x0c0], #n_reads_strong
     22	set		PAGE_SIZE, %g7
     23	prefetch	[%o1 + 0x100], #n_reads_strong
     24	prefetch	[%o1 + 0x140], #n_reads_strong
     25	prefetch	[%o1 + 0x180], #n_reads_strong
     26	prefetch	[%o1 + 0x1c0], #n_reads_strong
     271:
     28	ldx		[%o1 + 0x00], %o2
     29	subcc		%g7, 0x40, %g7
     30	ldx		[%o1 + 0x08], %o3
     31	ldx		[%o1 + 0x10], %o4
     32	ldx		[%o1 + 0x18], %o5
     33	ldx		[%o1 + 0x20], %g1
     34	stxa		%o2, [%o0] ASI_ST_BLKINIT_MRU_P
     35	add		%o0, 0x08, %o0
     36	ldx		[%o1 + 0x28], %g2
     37	stxa		%o3, [%o0] ASI_ST_BLKINIT_MRU_P
     38	add		%o0, 0x08, %o0
     39	ldx		[%o1 + 0x30], %g3
     40	stxa		%o4, [%o0] ASI_ST_BLKINIT_MRU_P
     41	add		%o0, 0x08, %o0
     42	ldx		[%o1 + 0x38], %o2
     43	add		%o1, 0x40, %o1
     44	stxa		%o5, [%o0] ASI_ST_BLKINIT_MRU_P
     45	add		%o0, 0x08, %o0
     46	stxa		%g1, [%o0] ASI_ST_BLKINIT_MRU_P
     47	add		%o0, 0x08, %o0
     48	stxa		%g2, [%o0] ASI_ST_BLKINIT_MRU_P
     49	add		%o0, 0x08, %o0
     50	stxa		%g3, [%o0] ASI_ST_BLKINIT_MRU_P
     51	add		%o0, 0x08, %o0
     52	stxa		%o2, [%o0] ASI_ST_BLKINIT_MRU_P
     53	add		%o0, 0x08, %o0
     54	bne,pt		%icc, 1b
     55	 prefetch	[%o1 + 0x200], #n_reads_strong
     56	retl
     57	 membar		#StoreLoad | #StoreStore
     58	.size		NG4copy_user_page,.-NG4copy_user_page