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|
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) IBM Corporation, 2011
*
* Author: Anton Blanchard <anton@au.ibm.com>
*/
#include <asm/ppc_asm.h>
#define STACKFRAMESIZE 256
#define STK_REG(i) (112 + ((i)-14)*8)
.macro err1
100:
.section __ex_table,"a"
.align 3
.llong 100b,.Ldo_err1
.previous
.endm
.macro err2
200:
.section __ex_table,"a"
.align 3
.llong 200b,.Ldo_err2
.previous
.endm
#ifdef CONFIG_ALTIVEC
.macro err3
300:
.section __ex_table,"a"
.align 3
.llong 300b,.Ldo_err3
.previous
.endm
.macro err4
400:
.section __ex_table,"a"
.align 3
.llong 400b,.Ldo_err4
.previous
.endm
.Ldo_err4:
ld r16,STK_REG(r16)(r1)
ld r15,STK_REG(r15)(r1)
ld r14,STK_REG(r14)(r1)
.Ldo_err3:
bl .exit_vmx_usercopy
ld r0,STACKFRAMESIZE+16(r1)
mtlr r0
b .Lexit
#endif /* CONFIG_ALTIVEC */
.Ldo_err2:
ld r22,STK_REG(r22)(r1)
ld r21,STK_REG(r21)(r1)
ld r20,STK_REG(r20)(r1)
ld r19,STK_REG(r19)(r1)
ld r18,STK_REG(r18)(r1)
ld r17,STK_REG(r17)(r1)
ld r16,STK_REG(r16)(r1)
ld r15,STK_REG(r15)(r1)
ld r14,STK_REG(r14)(r1)
.Lexit:
addi r1,r1,STACKFRAMESIZE
.Ldo_err1:
ld r3,48(r1)
ld r4,56(r1)
ld r5,64(r1)
b __copy_tofrom_user_base
_GLOBAL(__copy_tofrom_user_power7)
#ifdef CONFIG_ALTIVEC
cmpldi r5,16
cmpldi cr1,r5,4096
std r3,48(r1)
std r4,56(r1)
std r5,64(r1)
blt .Lshort_copy
bgt cr1,.Lvmx_copy
#else
cmpldi r5,16
std r3,48(r1)
std r4,56(r1)
std r5,64(r1)
blt .Lshort_copy
#endif
.Lnonvmx_copy:
/* Get the source 8B aligned */
neg r6,r4
mtocrf 0x01,r6
clrldi r6,r6,(64-3)
bf cr7*4+3,1f
err1; lbz r0,0(r4)
addi r4,r4,1
err1; stb r0,0(r3)
addi r3,r3,1
1: bf cr7*4+2,2f
err1; lhz r0,0(r4)
addi r4,r4,2
err1; sth r0,0(r3)
addi r3,r3,2
2: bf cr7*4+1,3f
err1; lwz r0,0(r4)
addi r4,r4,4
err1; stw r0,0(r3)
addi r3,r3,4
3: sub r5,r5,r6
cmpldi r5,128
blt 5f
mflr r0
stdu r1,-STACKFRAMESIZE(r1)
std r14,STK_REG(r14)(r1)
std r15,STK_REG(r15)(r1)
std r16,STK_REG(r16)(r1)
std r17,STK_REG(r17)(r1)
std r18,STK_REG(r18)(r1)
std r19,STK_REG(r19)(r1)
std r20,STK_REG(r20)(r1)
std r21,STK_REG(r21)(r1)
std r22,STK_REG(r22)(r1)
std r0,STACKFRAMESIZE+16(r1)
srdi r6,r5,7
mtctr r6
/* Now do cacheline (128B) sized loads and stores. */
.align 5
4:
err2; ld r0,0(r4)
err2; ld r6,8(r4)
err2; ld r7,16(r4)
err2; ld r8,24(r4)
err2; ld r9,32(r4)
err2; ld r10,40(r4)
err2; ld r11,48(r4)
err2; ld r12,56(r4)
err2; ld r14,64(r4)
err2; ld r15,72(r4)
err2; ld r16,80(r4)
err2; ld r17,88(r4)
err2; ld r18,96(r4)
err2; ld r19,104(r4)
err2; ld r20,112(r4)
err2; ld r21,120(r4)
addi r4,r4,128
err2; std r0,0(r3)
err2; std r6,8(r3)
err2; std r7,16(r3)
err2; std r8,24(r3)
err2; std r9,32(r3)
err2; std r10,40(r3)
err2; std r11,48(r3)
err2; std r12,56(r3)
err2; std r14,64(r3)
err2; std r15,72(r3)
err2; std r16,80(r3)
err2; std r17,88(r3)
err2; std r18,96(r3)
err2; std r19,104(r3)
err2; std r20,112(r3)
err2; std r21,120(r3)
addi r3,r3,128
bdnz 4b
clrldi r5,r5,(64-7)
ld r14,STK_REG(r14)(r1)
ld r15,STK_REG(r15)(r1)
ld r16,STK_REG(r16)(r1)
ld r17,STK_REG(r17)(r1)
ld r18,STK_REG(r18)(r1)
ld r19,STK_REG(r19)(r1)
ld r20,STK_REG(r20)(r1)
ld r21,STK_REG(r21)(r1)
ld r22,STK_REG(r22)(r1)
addi r1,r1,STACKFRAMESIZE
/* Up to 127B to go */
5: srdi r6,r5,4
mtocrf 0x01,r6
6: bf cr7*4+1,7f
err1; ld r0,0(r4)
err1; ld r6,8(r4)
err1; ld r7,16(r4)
err1; ld r8,24(r4)
err1; ld r9,32(r4)
err1; ld r10,40(r4)
err1; ld r11,48(r4)
err1; ld r12,56(r4)
addi r4,r4,64
err1; std r0,0(r3)
err1; std r6,8(r3)
err1; std r7,16(r3)
err1; std r8,24(r3)
err1; std r9,32(r3)
err1; std r10,40(r3)
err1; std r11,48(r3)
err1; std r12,56(r3)
addi r3,r3,64
/* Up to 63B to go */
7: bf cr7*4+2,8f
err1; ld r0,0(r4)
err1; ld r6,8(r4)
err1; ld r7,16(r4)
err1; ld r8,24(r4)
addi r4,r4,32
err1; std r0,0(r3)
err1; std r6,8(r3)
err1; std r7,16(r3)
err1; std r8,24(r3)
addi r3,r3,32
/* Up to 31B to go */
8: bf cr7*4+3,9f
err1; ld r0,0(r4)
err1; ld r6,8(r4)
addi r4,r4,16
err1; std r0,0(r3)
err1; std r6,8(r3)
addi r3,r3,16
9: clrldi r5,r5,(64-4)
/* Up to 15B to go */
.Lshort_copy:
mtocrf 0x01,r5
bf cr7*4+0,12f
err1; lwz r0,0(r4) /* Less chance of a reject with word ops */
err1; lwz r6,4(r4)
addi r4,r4,8
err1; stw r0,0(r3)
err1; stw r6,4(r3)
addi r3,r3,8
12: bf cr7*4+1,13f
err1; lwz r0,0(r4)
addi r4,r4,4
err1; stw r0,0(r3)
addi r3,r3,4
13: bf cr7*4+2,14f
err1; lhz r0,0(r4)
addi r4,r4,2
err1; sth r0,0(r3)
addi r3,r3,2
14: bf cr7*4+3,15f
err1; lbz r0,0(r4)
err1; stb r0,0(r3)
15: li r3,0
blr
.Lunwind_stack_nonvmx_copy:
addi r1,r1,STACKFRAMESIZE
b .Lnonvmx_copy
#ifdef CONFIG_ALTIVEC
.Lvmx_copy:
mflr r0
std r0,16(r1)
stdu r1,-STACKFRAMESIZE(r1)
bl .enter_vmx_usercopy
cmpwi r3,0
ld r0,STACKFRAMESIZE+16(r1)
ld r3,STACKFRAMESIZE+48(r1)
ld r4,STACKFRAMESIZE+56(r1)
ld r5,STACKFRAMESIZE+64(r1)
mtlr r0
/*
* We prefetch both the source and destination using enhanced touch
* instructions. We use a stream ID of 0 for the load side and
* 1 for the store side.
*/
clrrdi r6,r4,7
clrrdi r9,r3,7
ori r9,r9,1 /* stream=1 */
srdi r7,r5,7 /* length in cachelines, capped at 0x3FF */
cmpldi r7,0x3FF
ble 1f
li r7,0x3FF
1: lis r0,0x0E00 /* depth=7 */
sldi r7,r7,7
or r7,r7,r0
ori r10,r7,1 /* stream=1 */
lis r8,0x8000 /* GO=1 */
clrldi r8,r8,32
.machine push
.machine "power4"
dcbt r0,r6,0b01000
dcbt r0,r7,0b01010
dcbtst r0,r9,0b01000
dcbtst r0,r10,0b01010
eieio
dcbt r0,r8,0b01010 /* GO */
.machine pop
beq .Lunwind_stack_nonvmx_copy
/*
* If source and destination are not relatively aligned we use a
* slower permute loop.
*/
xor r6,r4,r3
rldicl. r6,r6,0,(64-4)
bne .Lvmx_unaligned_copy
/* Get the destination 16B aligned */
neg r6,r3
mtocrf 0x01,r6
clrldi r6,r6,(64-4)
bf cr7*4+3,1f
err3; lbz r0,0(r4)
addi r4,r4,1
err3; stb r0,0(r3)
addi r3,r3,1
1: bf cr7*4+2,2f
err3; lhz r0,0(r4)
addi r4,r4,2
err3; sth r0,0(r3)
addi r3,r3,2
2: bf cr7*4+1,3f
err3; lwz r0,0(r4)
addi r4,r4,4
err3; stw r0,0(r3)
addi r3,r3,4
3: bf cr7*4+0,4f
err3; ld r0,0(r4)
addi r4,r4,8
err3; std r0,0(r3)
addi r3,r3,8
4: sub r5,r5,r6
/* Get the desination 128B aligned */
neg r6,r3
srdi r7,r6,4
mtocrf 0x01,r7
clrldi r6,r6,(64-7)
li r9,16
li r10,32
li r11,48
bf cr7*4+3,5f
err3; lvx vr1,r0,r4
addi r4,r4,16
err3; stvx vr1,r0,r3
addi r3,r3,16
5: bf cr7*4+2,6f
err3; lvx vr1,r0,r4
err3; lvx vr0,r4,r9
addi r4,r4,32
err3; stvx vr1,r0,r3
err3; stvx vr0,r3,r9
addi r3,r3,32
6: bf cr7*4+1,7f
err3; lvx vr3,r0,r4
err3; lvx vr2,r4,r9
err3; lvx vr1,r4,r10
err3; lvx vr0,r4,r11
addi r4,r4,64
err3; stvx vr3,r0,r3
err3; stvx vr2,r3,r9
err3; stvx vr1,r3,r10
err3; stvx vr0,r3,r11
addi r3,r3,64
7: sub r5,r5,r6
srdi r6,r5,7
std r14,STK_REG(r14)(r1)
std r15,STK_REG(r15)(r1)
std r16,STK_REG(r16)(r1)
li r12,64
li r14,80
li r15,96
li r16,112
mtctr r6
/*
* Now do cacheline sized loads and stores. By this stage the
* cacheline stores are also cacheline aligned.
*/
.align 5
8:
err4; lvx vr7,r0,r4
err4; lvx vr6,r4,r9
err4; lvx vr5,r4,r10
err4; lvx vr4,r4,r11
err4; lvx vr3,r4,r12
err4; lvx vr2,r4,r14
err4; lvx vr1,r4,r15
err4; lvx vr0,r4,r16
addi r4,r4,128
err4; stvx vr7,r0,r3
err4; stvx vr6,r3,r9
err4; stvx vr5,r3,r10
err4; stvx vr4,r3,r11
err4; stvx vr3,r3,r12
err4; stvx vr2,r3,r14
err4; stvx vr1,r3,r15
err4; stvx vr0,r3,r16
addi r3,r3,128
bdnz 8b
ld r14,STK_REG(r14)(r1)
ld r15,STK_REG(r15)(r1)
ld r16,STK_REG(r16)(r1)
/* Up to 127B to go */
clrldi r5,r5,(64-7)
srdi r6,r5,4
mtocrf 0x01,r6
bf cr7*4+1,9f
err3; lvx vr3,r0,r4
err3; lvx vr2,r4,r9
err3; lvx vr1,r4,r10
err3; lvx vr0,r4,r11
addi r4,r4,64
err3; stvx vr3,r0,r3
err3; stvx vr2,r3,r9
err3; stvx vr1,r3,r10
err3; stvx vr0,r3,r11
addi r3,r3,64
9: bf cr7*4+2,10f
err3; lvx vr1,r0,r4
err3; lvx vr0,r4,r9
addi r4,r4,32
err3; stvx vr1,r0,r3
err3; stvx vr0,r3,r9
addi r3,r3,32
10: bf cr7*4+3,11f
err3; lvx vr1,r0,r4
addi r4,r4,16
err3; stvx vr1,r0,r3
addi r3,r3,16
/* Up to 15B to go */
11: clrldi r5,r5,(64-4)
mtocrf 0x01,r5
bf cr7*4+0,12f
err3; ld r0,0(r4)
addi r4,r4,8
err3; std r0,0(r3)
addi r3,r3,8
12: bf cr7*4+1,13f
err3; lwz r0,0(r4)
addi r4,r4,4
err3; stw r0,0(r3)
addi r3,r3,4
13: bf cr7*4+2,14f
err3; lhz r0,0(r4)
addi r4,r4,2
err3; sth r0,0(r3)
addi r3,r3,2
14: bf cr7*4+3,15f
err3; lbz r0,0(r4)
err3; stb r0,0(r3)
15: addi r1,r1,STACKFRAMESIZE
b .exit_vmx_usercopy /* tail call optimise */
.Lvmx_unaligned_copy:
/* Get the destination 16B aligned */
neg r6,r3
mtocrf 0x01,r6
clrldi r6,r6,(64-4)
bf cr7*4+3,1f
err3; lbz r0,0(r4)
addi r4,r4,1
err3; stb r0,0(r3)
addi r3,r3,1
1: bf cr7*4+2,2f
err3; lhz r0,0(r4)
addi r4,r4,2
err3; sth r0,0(r3)
addi r3,r3,2
2: bf cr7*4+1,3f
err3; lwz r0,0(r4)
addi r4,r4,4
err3; stw r0,0(r3)
addi r3,r3,4
3: bf cr7*4+0,4f
err3; lwz r0,0(r4) /* Less chance of a reject with word ops */
err3; lwz r7,4(r4)
addi r4,r4,8
err3; stw r0,0(r3)
err3; stw r7,4(r3)
addi r3,r3,8
4: sub r5,r5,r6
/* Get the desination 128B aligned */
neg r6,r3
srdi r7,r6,4
mtocrf 0x01,r7
clrldi r6,r6,(64-7)
li r9,16
li r10,32
li r11,48
lvsl vr16,0,r4 /* Setup permute control vector */
err3; lvx vr0,0,r4
addi r4,r4,16
bf cr7*4+3,5f
err3; lvx vr1,r0,r4
vperm vr8,vr0,vr1,vr16
addi r4,r4,16
err3; stvx vr8,r0,r3
addi r3,r3,16
vor vr0,vr1,vr1
5: bf cr7*4+2,6f
err3; lvx vr1,r0,r4
vperm vr8,vr0,vr1,vr16
err3; lvx vr0,r4,r9
vperm vr9,vr1,vr0,vr16
addi r4,r4,32
err3; stvx vr8,r0,r3
err3; stvx vr9,r3,r9
addi r3,r3,32
6: bf cr7*4+1,7f
err3; lvx vr3,r0,r4
vperm vr8,vr0,vr3,vr16
err3; lvx vr2,r4,r9
vperm vr9,vr3,vr2,vr16
err3; lvx vr1,r4,r10
vperm vr10,vr2,vr1,vr16
err3; lvx vr0,r4,r11
vperm vr11,vr1,vr0,vr16
addi r4,r4,64
err3; stvx vr8,r0,r3
err3; stvx vr9,r3,r9
err3; stvx vr10,r3,r10
err3; stvx vr11,r3,r11
addi r3,r3,64
7: sub r5,r5,r6
srdi r6,r5,7
std r14,STK_REG(r14)(r1)
std r15,STK_REG(r15)(r1)
std r16,STK_REG(r16)(r1)
li r12,64
li r14,80
li r15,96
li r16,112
mtctr r6
/*
* Now do cacheline sized loads and stores. By this stage the
* cacheline stores are also cacheline aligned.
*/
.align 5
8:
err4; lvx vr7,r0,r4
vperm vr8,vr0,vr7,vr16
err4; lvx vr6,r4,r9
vperm vr9,vr7,vr6,vr16
err4; lvx vr5,r4,r10
vperm vr10,vr6,vr5,vr16
err4; lvx vr4,r4,r11
vperm vr11,vr5,vr4,vr16
err4; lvx vr3,r4,r12
vperm vr12,vr4,vr3,vr16
err4; lvx vr2,r4,r14
vperm vr13,vr3,vr2,vr16
err4; lvx vr1,r4,r15
vperm vr14,vr2,vr1,vr16
err4; lvx vr0,r4,r16
vperm vr15,vr1,vr0,vr16
addi r4,r4,128
err4; stvx vr8,r0,r3
err4; stvx vr9,r3,r9
err4; stvx vr10,r3,r10
err4; stvx vr11,r3,r11
err4; stvx vr12,r3,r12
err4; stvx vr13,r3,r14
err4; stvx vr14,r3,r15
err4; stvx vr15,r3,r16
addi r3,r3,128
bdnz 8b
ld r14,STK_REG(r14)(r1)
ld r15,STK_REG(r15)(r1)
ld r16,STK_REG(r16)(r1)
/* Up to 127B to go */
clrldi r5,r5,(64-7)
srdi r6,r5,4
mtocrf 0x01,r6
bf cr7*4+1,9f
err3; lvx vr3,r0,r4
vperm vr8,vr0,vr3,vr16
err3; lvx vr2,r4,r9
vperm vr9,vr3,vr2,vr16
err3; lvx vr1,r4,r10
vperm vr10,vr2,vr1,vr16
err3; lvx vr0,r4,r11
vperm vr11,vr1,vr0,vr16
addi r4,r4,64
err3; stvx vr8,r0,r3
err3; stvx vr9,r3,r9
err3; stvx vr10,r3,r10
err3; stvx vr11,r3,r11
addi r3,r3,64
9: bf cr7*4+2,10f
err3; lvx vr1,r0,r4
vperm vr8,vr0,vr1,vr16
err3; lvx vr0,r4,r9
vperm vr9,vr1,vr0,vr16
addi r4,r4,32
err3; stvx vr8,r0,r3
err3; stvx vr9,r3,r9
addi r3,r3,32
10: bf cr7*4+3,11f
err3; lvx vr1,r0,r4
vperm vr8,vr0,vr1,vr16
addi r4,r4,16
err3; stvx vr8,r0,r3
addi r3,r3,16
/* Up to 15B to go */
11: clrldi r5,r5,(64-4)
addi r4,r4,-16 /* Unwind the +16 load offset */
mtocrf 0x01,r5
bf cr7*4+0,12f
err3; lwz r0,0(r4) /* Less chance of a reject with word ops */
err3; lwz r6,4(r4)
addi r4,r4,8
err3; stw r0,0(r3)
err3; stw r6,4(r3)
addi r3,r3,8
12: bf cr7*4+1,13f
err3; lwz r0,0(r4)
addi r4,r4,4
err3; stw r0,0(r3)
addi r3,r3,4
13: bf cr7*4+2,14f
err3; lhz r0,0(r4)
addi r4,r4,2
err3; sth r0,0(r3)
addi r3,r3,2
14: bf cr7*4+3,15f
err3; lbz r0,0(r4)
err3; stb r0,0(r3)
15: addi r1,r1,STACKFRAMESIZE
b .exit_vmx_usercopy /* tail call optimise */
#endif /* CONFiG_ALTIVEC */
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