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https://github.com/edk2-porting/linux-next.git
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98c45f51f7
The hand-coded assembler 64-bit copy routines include feature sections that select one code path or another depending on which CPU we are executing on. The self-tests for these copy routines end up testing just one path. This adds a mechanism for selecting any desired code path at compile time, and makes 2 or 3 versions of each test, each using a different code path, so as to cover all the possible paths. Signed-off-by: Paul Mackerras <paulus@ozlabs.org> [mpe: Add -mcpu=power4 to CFLAGS for older compilers] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
708 lines
12 KiB
ArmAsm
708 lines
12 KiB
ArmAsm
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) IBM Corporation, 2011
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*
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* Author: Anton Blanchard <anton@au.ibm.com>
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*/
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#include <asm/ppc_asm.h>
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#ifndef SELFTEST_CASE
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/* 0 == don't use VMX, 1 == use VMX */
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#define SELFTEST_CASE 0
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#endif
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#ifdef __BIG_ENDIAN__
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#define LVS(VRT,RA,RB) lvsl VRT,RA,RB
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#define VPERM(VRT,VRA,VRB,VRC) vperm VRT,VRA,VRB,VRC
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#else
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#define LVS(VRT,RA,RB) lvsr VRT,RA,RB
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#define VPERM(VRT,VRA,VRB,VRC) vperm VRT,VRB,VRA,VRC
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#endif
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.macro err1
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100:
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EX_TABLE(100b,.Ldo_err1)
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.endm
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.macro err2
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200:
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EX_TABLE(200b,.Ldo_err2)
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.endm
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#ifdef CONFIG_ALTIVEC
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.macro err3
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300:
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EX_TABLE(300b,.Ldo_err3)
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.endm
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.macro err4
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400:
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EX_TABLE(400b,.Ldo_err4)
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.endm
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.Ldo_err4:
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ld r16,STK_REG(R16)(r1)
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ld r15,STK_REG(R15)(r1)
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ld r14,STK_REG(R14)(r1)
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.Ldo_err3:
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bl exit_vmx_usercopy
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ld r0,STACKFRAMESIZE+16(r1)
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mtlr r0
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b .Lexit
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#endif /* CONFIG_ALTIVEC */
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.Ldo_err2:
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ld r22,STK_REG(R22)(r1)
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ld r21,STK_REG(R21)(r1)
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ld r20,STK_REG(R20)(r1)
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ld r19,STK_REG(R19)(r1)
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ld r18,STK_REG(R18)(r1)
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ld r17,STK_REG(R17)(r1)
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ld r16,STK_REG(R16)(r1)
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ld r15,STK_REG(R15)(r1)
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ld r14,STK_REG(R14)(r1)
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.Lexit:
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addi r1,r1,STACKFRAMESIZE
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.Ldo_err1:
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ld r3,-STACKFRAMESIZE+STK_REG(R31)(r1)
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ld r4,-STACKFRAMESIZE+STK_REG(R30)(r1)
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ld r5,-STACKFRAMESIZE+STK_REG(R29)(r1)
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b __copy_tofrom_user_base
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_GLOBAL(__copy_tofrom_user_power7)
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cmpldi r5,16
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cmpldi cr1,r5,3328
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std r3,-STACKFRAMESIZE+STK_REG(R31)(r1)
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std r4,-STACKFRAMESIZE+STK_REG(R30)(r1)
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std r5,-STACKFRAMESIZE+STK_REG(R29)(r1)
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blt .Lshort_copy
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#ifdef CONFIG_ALTIVEC
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test_feature = SELFTEST_CASE
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BEGIN_FTR_SECTION
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bgt cr1,.Lvmx_copy
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END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
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#endif
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.Lnonvmx_copy:
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/* Get the source 8B aligned */
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neg r6,r4
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mtocrf 0x01,r6
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clrldi r6,r6,(64-3)
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bf cr7*4+3,1f
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err1; lbz r0,0(r4)
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addi r4,r4,1
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err1; stb r0,0(r3)
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addi r3,r3,1
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1: bf cr7*4+2,2f
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err1; lhz r0,0(r4)
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addi r4,r4,2
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err1; sth r0,0(r3)
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addi r3,r3,2
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2: bf cr7*4+1,3f
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err1; lwz r0,0(r4)
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addi r4,r4,4
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err1; stw r0,0(r3)
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addi r3,r3,4
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3: sub r5,r5,r6
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cmpldi r5,128
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blt 5f
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mflr r0
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stdu r1,-STACKFRAMESIZE(r1)
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std r14,STK_REG(R14)(r1)
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std r15,STK_REG(R15)(r1)
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std r16,STK_REG(R16)(r1)
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std r17,STK_REG(R17)(r1)
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std r18,STK_REG(R18)(r1)
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std r19,STK_REG(R19)(r1)
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std r20,STK_REG(R20)(r1)
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std r21,STK_REG(R21)(r1)
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std r22,STK_REG(R22)(r1)
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std r0,STACKFRAMESIZE+16(r1)
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srdi r6,r5,7
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mtctr r6
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/* Now do cacheline (128B) sized loads and stores. */
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.align 5
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4:
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err2; ld r0,0(r4)
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err2; ld r6,8(r4)
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err2; ld r7,16(r4)
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err2; ld r8,24(r4)
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err2; ld r9,32(r4)
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err2; ld r10,40(r4)
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err2; ld r11,48(r4)
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err2; ld r12,56(r4)
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err2; ld r14,64(r4)
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err2; ld r15,72(r4)
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err2; ld r16,80(r4)
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err2; ld r17,88(r4)
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err2; ld r18,96(r4)
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err2; ld r19,104(r4)
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err2; ld r20,112(r4)
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err2; ld r21,120(r4)
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addi r4,r4,128
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err2; std r0,0(r3)
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err2; std r6,8(r3)
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err2; std r7,16(r3)
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err2; std r8,24(r3)
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err2; std r9,32(r3)
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err2; std r10,40(r3)
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err2; std r11,48(r3)
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err2; std r12,56(r3)
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err2; std r14,64(r3)
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err2; std r15,72(r3)
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err2; std r16,80(r3)
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err2; std r17,88(r3)
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err2; std r18,96(r3)
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err2; std r19,104(r3)
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err2; std r20,112(r3)
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err2; std r21,120(r3)
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addi r3,r3,128
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bdnz 4b
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clrldi r5,r5,(64-7)
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ld r14,STK_REG(R14)(r1)
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ld r15,STK_REG(R15)(r1)
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ld r16,STK_REG(R16)(r1)
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ld r17,STK_REG(R17)(r1)
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ld r18,STK_REG(R18)(r1)
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ld r19,STK_REG(R19)(r1)
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ld r20,STK_REG(R20)(r1)
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ld r21,STK_REG(R21)(r1)
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ld r22,STK_REG(R22)(r1)
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addi r1,r1,STACKFRAMESIZE
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/* Up to 127B to go */
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5: srdi r6,r5,4
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mtocrf 0x01,r6
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6: bf cr7*4+1,7f
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err1; ld r0,0(r4)
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err1; ld r6,8(r4)
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err1; ld r7,16(r4)
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err1; ld r8,24(r4)
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err1; ld r9,32(r4)
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err1; ld r10,40(r4)
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err1; ld r11,48(r4)
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err1; ld r12,56(r4)
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addi r4,r4,64
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err1; std r0,0(r3)
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err1; std r6,8(r3)
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err1; std r7,16(r3)
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err1; std r8,24(r3)
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err1; std r9,32(r3)
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err1; std r10,40(r3)
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err1; std r11,48(r3)
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err1; std r12,56(r3)
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addi r3,r3,64
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/* Up to 63B to go */
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7: bf cr7*4+2,8f
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err1; ld r0,0(r4)
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err1; ld r6,8(r4)
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err1; ld r7,16(r4)
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err1; ld r8,24(r4)
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addi r4,r4,32
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err1; std r0,0(r3)
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err1; std r6,8(r3)
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err1; std r7,16(r3)
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err1; std r8,24(r3)
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addi r3,r3,32
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/* Up to 31B to go */
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8: bf cr7*4+3,9f
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err1; ld r0,0(r4)
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err1; ld r6,8(r4)
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addi r4,r4,16
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err1; std r0,0(r3)
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err1; std r6,8(r3)
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addi r3,r3,16
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9: clrldi r5,r5,(64-4)
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/* Up to 15B to go */
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.Lshort_copy:
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mtocrf 0x01,r5
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bf cr7*4+0,12f
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err1; lwz r0,0(r4) /* Less chance of a reject with word ops */
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err1; lwz r6,4(r4)
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addi r4,r4,8
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err1; stw r0,0(r3)
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err1; stw r6,4(r3)
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addi r3,r3,8
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12: bf cr7*4+1,13f
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err1; lwz r0,0(r4)
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addi r4,r4,4
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err1; stw r0,0(r3)
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addi r3,r3,4
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13: bf cr7*4+2,14f
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err1; lhz r0,0(r4)
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addi r4,r4,2
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err1; sth r0,0(r3)
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addi r3,r3,2
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14: bf cr7*4+3,15f
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err1; lbz r0,0(r4)
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err1; stb r0,0(r3)
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15: li r3,0
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blr
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.Lunwind_stack_nonvmx_copy:
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addi r1,r1,STACKFRAMESIZE
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b .Lnonvmx_copy
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.Lvmx_copy:
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#ifdef CONFIG_ALTIVEC
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mflr r0
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std r0,16(r1)
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stdu r1,-STACKFRAMESIZE(r1)
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bl enter_vmx_usercopy
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cmpwi cr1,r3,0
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ld r0,STACKFRAMESIZE+16(r1)
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ld r3,STK_REG(R31)(r1)
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ld r4,STK_REG(R30)(r1)
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ld r5,STK_REG(R29)(r1)
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mtlr r0
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/*
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* We prefetch both the source and destination using enhanced touch
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* instructions. We use a stream ID of 0 for the load side and
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* 1 for the store side.
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*/
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clrrdi r6,r4,7
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clrrdi r9,r3,7
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ori r9,r9,1 /* stream=1 */
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srdi r7,r5,7 /* length in cachelines, capped at 0x3FF */
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cmpldi r7,0x3FF
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ble 1f
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li r7,0x3FF
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1: lis r0,0x0E00 /* depth=7 */
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sldi r7,r7,7
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or r7,r7,r0
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ori r10,r7,1 /* stream=1 */
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lis r8,0x8000 /* GO=1 */
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clrldi r8,r8,32
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/* setup read stream 0 */
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dcbt 0,r6,0b01000 /* addr from */
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dcbt 0,r7,0b01010 /* length and depth from */
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/* setup write stream 1 */
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dcbtst 0,r9,0b01000 /* addr to */
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dcbtst 0,r10,0b01010 /* length and depth to */
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eieio
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dcbt 0,r8,0b01010 /* all streams GO */
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beq cr1,.Lunwind_stack_nonvmx_copy
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/*
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* If source and destination are not relatively aligned we use a
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* slower permute loop.
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*/
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xor r6,r4,r3
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rldicl. r6,r6,0,(64-4)
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bne .Lvmx_unaligned_copy
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/* Get the destination 16B aligned */
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neg r6,r3
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mtocrf 0x01,r6
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clrldi r6,r6,(64-4)
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bf cr7*4+3,1f
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err3; lbz r0,0(r4)
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addi r4,r4,1
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err3; stb r0,0(r3)
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addi r3,r3,1
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1: bf cr7*4+2,2f
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err3; lhz r0,0(r4)
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addi r4,r4,2
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err3; sth r0,0(r3)
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addi r3,r3,2
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2: bf cr7*4+1,3f
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err3; lwz r0,0(r4)
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addi r4,r4,4
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err3; stw r0,0(r3)
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addi r3,r3,4
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3: bf cr7*4+0,4f
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err3; ld r0,0(r4)
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addi r4,r4,8
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err3; std r0,0(r3)
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addi r3,r3,8
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4: sub r5,r5,r6
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/* Get the desination 128B aligned */
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neg r6,r3
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srdi r7,r6,4
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mtocrf 0x01,r7
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clrldi r6,r6,(64-7)
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li r9,16
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li r10,32
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li r11,48
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bf cr7*4+3,5f
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err3; lvx v1,0,r4
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addi r4,r4,16
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err3; stvx v1,0,r3
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addi r3,r3,16
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5: bf cr7*4+2,6f
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err3; lvx v1,0,r4
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err3; lvx v0,r4,r9
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addi r4,r4,32
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err3; stvx v1,0,r3
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err3; stvx v0,r3,r9
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addi r3,r3,32
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6: bf cr7*4+1,7f
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err3; lvx v3,0,r4
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err3; lvx v2,r4,r9
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err3; lvx v1,r4,r10
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err3; lvx v0,r4,r11
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addi r4,r4,64
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err3; stvx v3,0,r3
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err3; stvx v2,r3,r9
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err3; stvx v1,r3,r10
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err3; stvx v0,r3,r11
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addi r3,r3,64
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7: sub r5,r5,r6
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srdi r6,r5,7
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std r14,STK_REG(R14)(r1)
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std r15,STK_REG(R15)(r1)
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std r16,STK_REG(R16)(r1)
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li r12,64
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li r14,80
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li r15,96
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li r16,112
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mtctr r6
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/*
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* Now do cacheline sized loads and stores. By this stage the
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* cacheline stores are also cacheline aligned.
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*/
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.align 5
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8:
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err4; lvx v7,0,r4
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err4; lvx v6,r4,r9
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err4; lvx v5,r4,r10
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err4; lvx v4,r4,r11
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err4; lvx v3,r4,r12
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err4; lvx v2,r4,r14
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err4; lvx v1,r4,r15
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err4; lvx v0,r4,r16
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addi r4,r4,128
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err4; stvx v7,0,r3
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err4; stvx v6,r3,r9
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err4; stvx v5,r3,r10
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err4; stvx v4,r3,r11
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err4; stvx v3,r3,r12
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err4; stvx v2,r3,r14
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err4; stvx v1,r3,r15
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err4; stvx v0,r3,r16
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addi r3,r3,128
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bdnz 8b
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ld r14,STK_REG(R14)(r1)
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ld r15,STK_REG(R15)(r1)
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ld r16,STK_REG(R16)(r1)
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/* Up to 127B to go */
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clrldi r5,r5,(64-7)
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srdi r6,r5,4
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mtocrf 0x01,r6
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bf cr7*4+1,9f
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err3; lvx v3,0,r4
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err3; lvx v2,r4,r9
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err3; lvx v1,r4,r10
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err3; lvx v0,r4,r11
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addi r4,r4,64
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err3; stvx v3,0,r3
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err3; stvx v2,r3,r9
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err3; stvx v1,r3,r10
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err3; stvx v0,r3,r11
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addi r3,r3,64
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9: bf cr7*4+2,10f
|
|
err3; lvx v1,0,r4
|
|
err3; lvx v0,r4,r9
|
|
addi r4,r4,32
|
|
err3; stvx v1,0,r3
|
|
err3; stvx v0,r3,r9
|
|
addi r3,r3,32
|
|
|
|
10: bf cr7*4+3,11f
|
|
err3; lvx v1,0,r4
|
|
addi r4,r4,16
|
|
err3; stvx v1,0,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
|
|
|
|
LVS(v16,0,r4) /* Setup permute control vector */
|
|
err3; lvx v0,0,r4
|
|
addi r4,r4,16
|
|
|
|
bf cr7*4+3,5f
|
|
err3; lvx v1,0,r4
|
|
VPERM(v8,v0,v1,v16)
|
|
addi r4,r4,16
|
|
err3; stvx v8,0,r3
|
|
addi r3,r3,16
|
|
vor v0,v1,v1
|
|
|
|
5: bf cr7*4+2,6f
|
|
err3; lvx v1,0,r4
|
|
VPERM(v8,v0,v1,v16)
|
|
err3; lvx v0,r4,r9
|
|
VPERM(v9,v1,v0,v16)
|
|
addi r4,r4,32
|
|
err3; stvx v8,0,r3
|
|
err3; stvx v9,r3,r9
|
|
addi r3,r3,32
|
|
|
|
6: bf cr7*4+1,7f
|
|
err3; lvx v3,0,r4
|
|
VPERM(v8,v0,v3,v16)
|
|
err3; lvx v2,r4,r9
|
|
VPERM(v9,v3,v2,v16)
|
|
err3; lvx v1,r4,r10
|
|
VPERM(v10,v2,v1,v16)
|
|
err3; lvx v0,r4,r11
|
|
VPERM(v11,v1,v0,v16)
|
|
addi r4,r4,64
|
|
err3; stvx v8,0,r3
|
|
err3; stvx v9,r3,r9
|
|
err3; stvx v10,r3,r10
|
|
err3; stvx v11,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 v7,0,r4
|
|
VPERM(v8,v0,v7,v16)
|
|
err4; lvx v6,r4,r9
|
|
VPERM(v9,v7,v6,v16)
|
|
err4; lvx v5,r4,r10
|
|
VPERM(v10,v6,v5,v16)
|
|
err4; lvx v4,r4,r11
|
|
VPERM(v11,v5,v4,v16)
|
|
err4; lvx v3,r4,r12
|
|
VPERM(v12,v4,v3,v16)
|
|
err4; lvx v2,r4,r14
|
|
VPERM(v13,v3,v2,v16)
|
|
err4; lvx v1,r4,r15
|
|
VPERM(v14,v2,v1,v16)
|
|
err4; lvx v0,r4,r16
|
|
VPERM(v15,v1,v0,v16)
|
|
addi r4,r4,128
|
|
err4; stvx v8,0,r3
|
|
err4; stvx v9,r3,r9
|
|
err4; stvx v10,r3,r10
|
|
err4; stvx v11,r3,r11
|
|
err4; stvx v12,r3,r12
|
|
err4; stvx v13,r3,r14
|
|
err4; stvx v14,r3,r15
|
|
err4; stvx v15,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 v3,0,r4
|
|
VPERM(v8,v0,v3,v16)
|
|
err3; lvx v2,r4,r9
|
|
VPERM(v9,v3,v2,v16)
|
|
err3; lvx v1,r4,r10
|
|
VPERM(v10,v2,v1,v16)
|
|
err3; lvx v0,r4,r11
|
|
VPERM(v11,v1,v0,v16)
|
|
addi r4,r4,64
|
|
err3; stvx v8,0,r3
|
|
err3; stvx v9,r3,r9
|
|
err3; stvx v10,r3,r10
|
|
err3; stvx v11,r3,r11
|
|
addi r3,r3,64
|
|
|
|
9: bf cr7*4+2,10f
|
|
err3; lvx v1,0,r4
|
|
VPERM(v8,v0,v1,v16)
|
|
err3; lvx v0,r4,r9
|
|
VPERM(v9,v1,v0,v16)
|
|
addi r4,r4,32
|
|
err3; stvx v8,0,r3
|
|
err3; stvx v9,r3,r9
|
|
addi r3,r3,32
|
|
|
|
10: bf cr7*4+3,11f
|
|
err3; lvx v1,0,r4
|
|
VPERM(v8,v0,v1,v16)
|
|
addi r4,r4,16
|
|
err3; stvx v8,0,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 */
|