/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) IBM Corporation, 2011 * Derived from copyuser_power7.s by Anton Blanchard * Author - Balbir Singh */ #include #include #include .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(memcpy_mcsafe) 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(memcpy_mcsafe);