| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|
| 2 | /* |
|---|
| 3 | * Copyright (C) IBM Corporation, 2011 |
|---|
| 4 | * Derived from copyuser_power7.s by Anton Blanchard <anton@au.ibm.com> |
|---|
| 5 | * Author - Balbir Singh <bsingharora@gmail.com> |
|---|
| 6 | */ |
|---|
| 7 | #include <linux/export.h> |
|---|
| 8 | #include <asm/ppc_asm.h> |
|---|
| 9 | #include <asm/errno.h> |
|---|
| 10 | |
|---|
| 11 | .macro err1 |
|---|
| 12 | 100: |
|---|
| 13 | EX_TABLE(100b,.Ldo_err1) |
|---|
| 14 | .endm |
|---|
| 15 | |
|---|
| 16 | .macro err2 |
|---|
| 17 | 200: |
|---|
| 18 | EX_TABLE(200b,.Ldo_err2) |
|---|
| 19 | .endm |
|---|
| 20 | |
|---|
| 21 | .macro err3 |
|---|
| 22 | 300: EX_TABLE(300b,.Ldone) |
|---|
| 23 | .endm |
|---|
| 24 | |
|---|
| 25 | .Ldo_err2: |
|---|
| 26 | ld r22,STK_REG(R22)(r1) |
|---|
| 27 | ld r21,STK_REG(R21)(r1) |
|---|
| 28 | ld r20,STK_REG(R20)(r1) |
|---|
| 29 | ld r19,STK_REG(R19)(r1) |
|---|
| 30 | ld r18,STK_REG(R18)(r1) |
|---|
| 31 | ld r17,STK_REG(R17)(r1) |
|---|
| 32 | ld r16,STK_REG(R16)(r1) |
|---|
| 33 | ld r15,STK_REG(R15)(r1) |
|---|
| 34 | ld r14,STK_REG(R14)(r1) |
|---|
| 35 | addi r1,r1,STACKFRAMESIZE |
|---|
| 36 | .Ldo_err1: |
|---|
| 37 | /* Do a byte by byte copy to get the exact remaining size */ |
|---|
| 38 | mtctr r7 |
|---|
| 39 | 46: |
|---|
| 40 | err3; lbz r0,0(r4) |
|---|
| 41 | addi r4,r4,1 |
|---|
| 42 | err3; stb r0,0(r3) |
|---|
| 43 | addi r3,r3,1 |
|---|
| 44 | bdnz 46b |
|---|
| 45 | li r3,0 |
|---|
| 46 | blr |
|---|
| 47 | |
|---|
| 48 | .Ldone: |
|---|
| 49 | mfctr r3 |
|---|
| 50 | blr |
|---|
| 51 | |
|---|
| 52 | |
|---|
| 53 | _GLOBAL(copy_mc_generic) |
|---|
| 54 | mr r7,r5 |
|---|
| 55 | cmpldi r5,16 |
|---|
| 56 | blt .Lshort_copy |
|---|
| 57 | |
|---|
| 58 | .Lcopy: |
|---|
| 59 | /* Get the source 8B aligned */ |
|---|
| 60 | neg r6,r4 |
|---|
| 61 | mtocrf 0x01,r6 |
|---|
| 62 | clrldi r6,r6,(64-3) |
|---|
| 63 | |
|---|
| 64 | bf cr7*4+3,1f |
|---|
| 65 | err1; lbz r0,0(r4) |
|---|
| 66 | addi r4,r4,1 |
|---|
| 67 | err1; stb r0,0(r3) |
|---|
| 68 | addi r3,r3,1 |
|---|
| 69 | subi r7,r7,1 |
|---|
| 70 | |
|---|
| 71 | 1: bf cr7*4+2,2f |
|---|
| 72 | err1; lhz r0,0(r4) |
|---|
| 73 | addi r4,r4,2 |
|---|
| 74 | err1; sth r0,0(r3) |
|---|
| 75 | addi r3,r3,2 |
|---|
| 76 | subi r7,r7,2 |
|---|
| 77 | |
|---|
| 78 | 2: bf cr7*4+1,3f |
|---|
| 79 | err1; lwz r0,0(r4) |
|---|
| 80 | addi r4,r4,4 |
|---|
| 81 | err1; stw r0,0(r3) |
|---|
| 82 | addi r3,r3,4 |
|---|
| 83 | subi r7,r7,4 |
|---|
| 84 | |
|---|
| 85 | 3: sub r5,r5,r6 |
|---|
| 86 | cmpldi r5,128 |
|---|
| 87 | |
|---|
| 88 | mflr r0 |
|---|
| 89 | stdu r1,-STACKFRAMESIZE(r1) |
|---|
| 90 | std r14,STK_REG(R14)(r1) |
|---|
| 91 | std r15,STK_REG(R15)(r1) |
|---|
| 92 | std r16,STK_REG(R16)(r1) |
|---|
| 93 | std r17,STK_REG(R17)(r1) |
|---|
| 94 | std r18,STK_REG(R18)(r1) |
|---|
| 95 | std r19,STK_REG(R19)(r1) |
|---|
| 96 | std r20,STK_REG(R20)(r1) |
|---|
| 97 | std r21,STK_REG(R21)(r1) |
|---|
| 98 | std r22,STK_REG(R22)(r1) |
|---|
| 99 | std r0,STACKFRAMESIZE+16(r1) |
|---|
| 100 | |
|---|
| 101 | blt 5f |
|---|
| 102 | srdi r6,r5,7 |
|---|
| 103 | mtctr r6 |
|---|
| 104 | |
|---|
| 105 | /* Now do cacheline (128B) sized loads and stores. */ |
|---|
| 106 | .align 5 |
|---|
| 107 | 4: |
|---|
| 108 | err2; ld r0,0(r4) |
|---|
| 109 | err2; ld r6,8(r4) |
|---|
| 110 | err2; ld r8,16(r4) |
|---|
| 111 | err2; ld r9,24(r4) |
|---|
| 112 | err2; ld r10,32(r4) |
|---|
| 113 | err2; ld r11,40(r4) |
|---|
| 114 | err2; ld r12,48(r4) |
|---|
| 115 | err2; ld r14,56(r4) |
|---|
| 116 | err2; ld r15,64(r4) |
|---|
| 117 | err2; ld r16,72(r4) |
|---|
| 118 | err2; ld r17,80(r4) |
|---|
| 119 | err2; ld r18,88(r4) |
|---|
| 120 | err2; ld r19,96(r4) |
|---|
| 121 | err2; ld r20,104(r4) |
|---|
| 122 | err2; ld r21,112(r4) |
|---|
| 123 | err2; ld r22,120(r4) |
|---|
| 124 | addi r4,r4,128 |
|---|
| 125 | err2; std r0,0(r3) |
|---|
| 126 | err2; std r6,8(r3) |
|---|
| 127 | err2; std r8,16(r3) |
|---|
| 128 | err2; std r9,24(r3) |
|---|
| 129 | err2; std r10,32(r3) |
|---|
| 130 | err2; std r11,40(r3) |
|---|
| 131 | err2; std r12,48(r3) |
|---|
| 132 | err2; std r14,56(r3) |
|---|
| 133 | err2; std r15,64(r3) |
|---|
| 134 | err2; std r16,72(r3) |
|---|
| 135 | err2; std r17,80(r3) |
|---|
| 136 | err2; std r18,88(r3) |
|---|
| 137 | err2; std r19,96(r3) |
|---|
| 138 | err2; std r20,104(r3) |
|---|
| 139 | err2; std r21,112(r3) |
|---|
| 140 | err2; std r22,120(r3) |
|---|
| 141 | addi r3,r3,128 |
|---|
| 142 | subi r7,r7,128 |
|---|
| 143 | bdnz 4b |
|---|
| 144 | |
|---|
| 145 | clrldi r5,r5,(64-7) |
|---|
| 146 | |
|---|
| 147 | /* Up to 127B to go */ |
|---|
| 148 | 5: srdi r6,r5,4 |
|---|
| 149 | mtocrf 0x01,r6 |
|---|
| 150 | |
|---|
| 151 | 6: bf cr7*4+1,7f |
|---|
| 152 | err2; ld r0,0(r4) |
|---|
| 153 | err2; ld r6,8(r4) |
|---|
| 154 | err2; ld r8,16(r4) |
|---|
| 155 | err2; ld r9,24(r4) |
|---|
| 156 | err2; ld r10,32(r4) |
|---|
| 157 | err2; ld r11,40(r4) |
|---|
| 158 | err2; ld r12,48(r4) |
|---|
| 159 | err2; ld r14,56(r4) |
|---|
| 160 | addi r4,r4,64 |
|---|
| 161 | err2; std r0,0(r3) |
|---|
| 162 | err2; std r6,8(r3) |
|---|
| 163 | err2; std r8,16(r3) |
|---|
| 164 | err2; std r9,24(r3) |
|---|
| 165 | err2; std r10,32(r3) |
|---|
| 166 | err2; std r11,40(r3) |
|---|
| 167 | err2; std r12,48(r3) |
|---|
| 168 | err2; std r14,56(r3) |
|---|
| 169 | addi r3,r3,64 |
|---|
| 170 | subi r7,r7,64 |
|---|
| 171 | |
|---|
| 172 | 7: ld r14,STK_REG(R14)(r1) |
|---|
| 173 | ld r15,STK_REG(R15)(r1) |
|---|
| 174 | ld r16,STK_REG(R16)(r1) |
|---|
| 175 | ld r17,STK_REG(R17)(r1) |
|---|
| 176 | ld r18,STK_REG(R18)(r1) |
|---|
| 177 | ld r19,STK_REG(R19)(r1) |
|---|
| 178 | ld r20,STK_REG(R20)(r1) |
|---|
| 179 | ld r21,STK_REG(R21)(r1) |
|---|
| 180 | ld r22,STK_REG(R22)(r1) |
|---|
| 181 | addi r1,r1,STACKFRAMESIZE |
|---|
| 182 | |
|---|
| 183 | /* Up to 63B to go */ |
|---|
| 184 | bf cr7*4+2,8f |
|---|
| 185 | err1; ld r0,0(r4) |
|---|
| 186 | err1; ld r6,8(r4) |
|---|
| 187 | err1; ld r8,16(r4) |
|---|
| 188 | err1; ld r9,24(r4) |
|---|
| 189 | addi r4,r4,32 |
|---|
| 190 | err1; std r0,0(r3) |
|---|
| 191 | err1; std r6,8(r3) |
|---|
| 192 | err1; std r8,16(r3) |
|---|
| 193 | err1; std r9,24(r3) |
|---|
| 194 | addi r3,r3,32 |
|---|
| 195 | subi r7,r7,32 |
|---|
| 196 | |
|---|
| 197 | /* Up to 31B to go */ |
|---|
| 198 | 8: bf cr7*4+3,9f |
|---|
| 199 | err1; ld r0,0(r4) |
|---|
| 200 | err1; ld r6,8(r4) |
|---|
| 201 | addi r4,r4,16 |
|---|
| 202 | err1; std r0,0(r3) |
|---|
| 203 | err1; std r6,8(r3) |
|---|
| 204 | addi r3,r3,16 |
|---|
| 205 | subi r7,r7,16 |
|---|
| 206 | |
|---|
| 207 | 9: clrldi r5,r5,(64-4) |
|---|
| 208 | |
|---|
| 209 | /* Up to 15B to go */ |
|---|
| 210 | .Lshort_copy: |
|---|
| 211 | mtocrf 0x01,r5 |
|---|
| 212 | bf cr7*4+0,12f |
|---|
| 213 | err1; lwz r0,0(r4) /* Less chance of a reject with word ops */ |
|---|
| 214 | err1; lwz r6,4(r4) |
|---|
| 215 | addi r4,r4,8 |
|---|
| 216 | err1; stw r0,0(r3) |
|---|
| 217 | err1; stw r6,4(r3) |
|---|
| 218 | addi r3,r3,8 |
|---|
| 219 | subi r7,r7,8 |
|---|
| 220 | |
|---|
| 221 | 12: bf cr7*4+1,13f |
|---|
| 222 | err1; lwz r0,0(r4) |
|---|
| 223 | addi r4,r4,4 |
|---|
| 224 | err1; stw r0,0(r3) |
|---|
| 225 | addi r3,r3,4 |
|---|
| 226 | subi r7,r7,4 |
|---|
| 227 | |
|---|
| 228 | 13: bf cr7*4+2,14f |
|---|
| 229 | err1; lhz r0,0(r4) |
|---|
| 230 | addi r4,r4,2 |
|---|
| 231 | err1; sth r0,0(r3) |
|---|
| 232 | addi r3,r3,2 |
|---|
| 233 | subi r7,r7,2 |
|---|
| 234 | |
|---|
| 235 | 14: bf cr7*4+3,15f |
|---|
| 236 | err1; lbz r0,0(r4) |
|---|
| 237 | err1; stb r0,0(r3) |
|---|
| 238 | |
|---|
| 239 | 15: li r3,0 |
|---|
| 240 | blr |
|---|
| 241 | |
|---|
| 242 | EXPORT_SYMBOL_GPL(copy_mc_generic); |
|---|
| 243 | |
|---|
