mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
b3a04ed507
New algorithm that takes advantage of the M7/M8 block init store ASI, ie, overlapping pipelines and miss buffer filling. Full details in code comments. Signed-off-by: Babu Moger <babu.moger@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
51 lines
1.2 KiB
ArmAsm
51 lines
1.2 KiB
ArmAsm
/*
|
|
* M7patch.S: Patch generic routines with M7 variant.
|
|
*
|
|
* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
#define BRANCH_ALWAYS 0x10680000
|
|
#define NOP 0x01000000
|
|
#define NG_DO_PATCH(OLD, NEW) \
|
|
sethi %hi(NEW), %g1; \
|
|
or %g1, %lo(NEW), %g1; \
|
|
sethi %hi(OLD), %g2; \
|
|
or %g2, %lo(OLD), %g2; \
|
|
sub %g1, %g2, %g1; \
|
|
sethi %hi(BRANCH_ALWAYS), %g3; \
|
|
sll %g1, 11, %g1; \
|
|
srl %g1, 11 + 2, %g1; \
|
|
or %g3, %lo(BRANCH_ALWAYS), %g3; \
|
|
or %g3, %g1, %g3; \
|
|
stw %g3, [%g2]; \
|
|
sethi %hi(NOP), %g3; \
|
|
or %g3, %lo(NOP), %g3; \
|
|
stw %g3, [%g2 + 0x4]; \
|
|
flush %g2;
|
|
|
|
ENTRY(m7_patch_copyops)
|
|
NG_DO_PATCH(memcpy, M7memcpy)
|
|
NG_DO_PATCH(raw_copy_from_user, M7copy_from_user)
|
|
NG_DO_PATCH(raw_copy_to_user, M7copy_to_user)
|
|
retl
|
|
nop
|
|
ENDPROC(m7_patch_copyops)
|
|
|
|
ENTRY(m7_patch_bzero)
|
|
NG_DO_PATCH(memset, M7memset)
|
|
NG_DO_PATCH(__bzero, M7bzero)
|
|
NG_DO_PATCH(__clear_user, NGclear_user)
|
|
NG_DO_PATCH(tsb_init, NGtsb_init)
|
|
retl
|
|
nop
|
|
ENDPROC(m7_patch_bzero)
|
|
|
|
ENTRY(m7_patch_pageops)
|
|
NG_DO_PATCH(copy_user_page, NG4copy_user_page)
|
|
NG_DO_PATCH(_clear_page, M7clear_page)
|
|
NG_DO_PATCH(clear_user_page, M7clear_user_page)
|
|
retl
|
|
nop
|
|
ENDPROC(m7_patch_pageops)
|