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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 | /* 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); |