| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) IBM Corporation, 2011 |
| * Derived from copyuser_power7.s by Anton Blanchard <anton@au.ibm.com> |
| * Author - Balbir Singh <bsingharora@gmail.com> |
| */ |
| #include <asm/ppc_asm.h> |
| #include <asm/errno.h> |
| #include <asm/export.h> |
| |
| .macro err1 |
| 100: |
| EX_TABLE(100b,.Ldo_err1) |
| .endm |
| |
| .macro err2 |
| 200: |
| EX_TABLE(200b,.Ldo_err2) |
| .endm |
| |
| .macro err3 |
| 300: EX_TABLE(300b,.Ldone) |
| .endm |
| |
| .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) |
| addi r1,r1,STACKFRAMESIZE |
| .Ldo_err1: |
| /* Do a byte by byte copy to get the exact remaining size */ |
| mtctr r7 |
| 46: |
| err3; lbz r0,0(r4) |
| addi r4,r4,1 |
| err3; stb r0,0(r3) |
| addi r3,r3,1 |
| bdnz 46b |
| li r3,0 |
| blr |
| |
| .Ldone: |
| mfctr r3 |
| blr |
| |
| |
| _GLOBAL(copy_mc_generic) |
| mr r7,r5 |
| cmpldi r5,16 |
| blt .Lshort_copy |
| |
| .Lcopy: |
| /* 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 |
| subi r7,r7,1 |
| |
| 1: bf cr7*4+2,2f |
| err1; lhz r0,0(r4) |
| addi r4,r4,2 |
| err1; sth r0,0(r3) |
| addi r3,r3,2 |
| subi r7,r7,2 |
| |
| 2: bf cr7*4+1,3f |
| err1; lwz r0,0(r4) |
| addi r4,r4,4 |
| err1; stw r0,0(r3) |
| addi r3,r3,4 |
| subi r7,r7,4 |
| |
| 3: sub r5,r5,r6 |
| cmpldi r5,128 |
| |
| 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) |
| |
| blt 5f |
| 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 r8,16(r4) |
| err2; ld r9,24(r4) |
| err2; ld r10,32(r4) |
| err2; ld r11,40(r4) |
| err2; ld r12,48(r4) |
| err2; ld r14,56(r4) |
| err2; ld r15,64(r4) |
| err2; ld r16,72(r4) |
| err2; ld r17,80(r4) |
| err2; ld r18,88(r4) |
| err2; ld r19,96(r4) |
| err2; ld r20,104(r4) |
| err2; ld r21,112(r4) |
| err2; ld r22,120(r4) |
| addi r4,r4,128 |
| err2; std r0,0(r3) |
| err2; std r6,8(r3) |
| err2; std r8,16(r3) |
| err2; std r9,24(r3) |
| err2; std r10,32(r3) |
| err2; std r11,40(r3) |
| err2; std r12,48(r3) |
| err2; std r14,56(r3) |
| err2; std r15,64(r3) |
| err2; std r16,72(r3) |
| err2; std r17,80(r3) |
| err2; std r18,88(r3) |
| err2; std r19,96(r3) |
| err2; std r20,104(r3) |
| err2; std r21,112(r3) |
| err2; std r22,120(r3) |
| addi r3,r3,128 |
| subi r7,r7,128 |
| bdnz 4b |
| |
| clrldi r5,r5,(64-7) |
| |
| /* Up to 127B to go */ |
| 5: srdi r6,r5,4 |
| mtocrf 0x01,r6 |
| |
| 6: bf cr7*4+1,7f |
| err2; ld r0,0(r4) |
| err2; ld r6,8(r4) |
| err2; ld r8,16(r4) |
| err2; ld r9,24(r4) |
| err2; ld r10,32(r4) |
| err2; ld r11,40(r4) |
| err2; ld r12,48(r4) |
| err2; ld r14,56(r4) |
| addi r4,r4,64 |
| err2; std r0,0(r3) |
| err2; std r6,8(r3) |
| err2; std r8,16(r3) |
| err2; std r9,24(r3) |
| err2; std r10,32(r3) |
| err2; std r11,40(r3) |
| err2; std r12,48(r3) |
| err2; std r14,56(r3) |
| addi r3,r3,64 |
| subi r7,r7,64 |
| |
| 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 63B to go */ |
| bf cr7*4+2,8f |
| err1; ld r0,0(r4) |
| err1; ld r6,8(r4) |
| err1; ld r8,16(r4) |
| err1; ld r9,24(r4) |
| addi r4,r4,32 |
| err1; std r0,0(r3) |
| err1; std r6,8(r3) |
| err1; std r8,16(r3) |
| err1; std r9,24(r3) |
| addi r3,r3,32 |
| subi r7,r7,32 |
| |
| /* 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 |
| subi r7,r7,16 |
| |
| 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 |
| subi r7,r7,8 |
| |
| 12: bf cr7*4+1,13f |
| err1; lwz r0,0(r4) |
| addi r4,r4,4 |
| err1; stw r0,0(r3) |
| addi r3,r3,4 |
| subi r7,r7,4 |
| |
| 13: bf cr7*4+2,14f |
| err1; lhz r0,0(r4) |
| addi r4,r4,2 |
| err1; sth r0,0(r3) |
| addi r3,r3,2 |
| subi r7,r7,2 |
| |
| 14: bf cr7*4+3,15f |
| err1; lbz r0,0(r4) |
| err1; stb r0,0(r3) |
| |
| 15: li r3,0 |
| blr |
| |
| EXPORT_SYMBOL_GPL(copy_mc_generic); |
