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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 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * arch/arm/include/asm/xor.h * * Copyright (C) 2001 Russell King */ #include <linux/hardirq.h> #include <asm-generic/xor.h> #include <asm/hwcap.h> #include <asm/neon.h> #define __XOR(a1, a2) a1 ^= a2 #define GET_BLOCK_2(dst) \ __asm__("ldmia %0, {%1, %2}" \ : "=r" (dst), "=r" (a1), "=r" (a2) \ : "0" (dst)) #define GET_BLOCK_4(dst) \ __asm__("ldmia %0, {%1, %2, %3, %4}" \ : "=r" (dst), "=r" (a1), "=r" (a2), "=r" (a3), "=r" (a4) \ : "0" (dst)) #define XOR_BLOCK_2(src) \ __asm__("ldmia %0!, {%1, %2}" \ : "=r" (src), "=r" (b1), "=r" (b2) \ : "0" (src)); \ __XOR(a1, b1); __XOR(a2, b2); #define XOR_BLOCK_4(src) \ __asm__("ldmia %0!, {%1, %2, %3, %4}" \ : "=r" (src), "=r" (b1), "=r" (b2), "=r" (b3), "=r" (b4) \ : "0" (src)); \ __XOR(a1, b1); __XOR(a2, b2); __XOR(a3, b3); __XOR(a4, b4) #define PUT_BLOCK_2(dst) \ __asm__ __volatile__("stmia %0!, {%2, %3}" \ : "=r" (dst) \ : "0" (dst), "r" (a1), "r" (a2)) #define PUT_BLOCK_4(dst) \ __asm__ __volatile__("stmia %0!, {%2, %3, %4, %5}" \ : "=r" (dst) \ : "0" (dst), "r" (a1), "r" (a2), "r" (a3), "r" (a4)) static void xor_arm4regs_2(unsigned long bytes, unsigned long *p1, unsigned long *p2) { unsigned int lines = bytes / sizeof(unsigned long) / 4; register unsigned int a1 __asm__("r4"); register unsigned int a2 __asm__("r5"); register unsigned int a3 __asm__("r6"); register unsigned int a4 __asm__("r7"); register unsigned int b1 __asm__("r8"); register unsigned int b2 __asm__("r9"); register unsigned int b3 __asm__("ip"); register unsigned int b4 __asm__("lr"); do { GET_BLOCK_4(p1); XOR_BLOCK_4(p2); PUT_BLOCK_4(p1); } while (--lines); } static void xor_arm4regs_3(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3) { unsigned int lines = bytes / sizeof(unsigned long) / 4; register unsigned int a1 __asm__("r4"); register unsigned int a2 __asm__("r5"); register unsigned int a3 __asm__("r6"); register unsigned int a4 __asm__("r7"); register unsigned int b1 __asm__("r8"); register unsigned int b2 __asm__("r9"); register unsigned int b3 __asm__("ip"); register unsigned int b4 __asm__("lr"); do { GET_BLOCK_4(p1); XOR_BLOCK_4(p2); XOR_BLOCK_4(p3); PUT_BLOCK_4(p1); } while (--lines); } static void xor_arm4regs_4(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4) { unsigned int lines = bytes / sizeof(unsigned long) / 2; register unsigned int a1 __asm__("r8"); register unsigned int a2 __asm__("r9"); register unsigned int b1 __asm__("ip"); register unsigned int b2 __asm__("lr"); do { GET_BLOCK_2(p1); XOR_BLOCK_2(p2); XOR_BLOCK_2(p3); XOR_BLOCK_2(p4); PUT_BLOCK_2(p1); } while (--lines); } static void xor_arm4regs_5(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4, unsigned long *p5) { unsigned int lines = bytes / sizeof(unsigned long) / 2; register unsigned int a1 __asm__("r8"); register unsigned int a2 __asm__("r9"); register unsigned int b1 __asm__("ip"); register unsigned int b2 __asm__("lr"); do { GET_BLOCK_2(p1); XOR_BLOCK_2(p2); XOR_BLOCK_2(p3); XOR_BLOCK_2(p4); XOR_BLOCK_2(p5); PUT_BLOCK_2(p1); } while (--lines); } static struct xor_block_template xor_block_arm4regs = { .name = "arm4regs", .do_2 = xor_arm4regs_2, .do_3 = xor_arm4regs_3, .do_4 = xor_arm4regs_4, .do_5 = xor_arm4regs_5, }; #undef XOR_TRY_TEMPLATES #define XOR_TRY_TEMPLATES \ do { \ xor_speed(&xor_block_arm4regs); \ xor_speed(&xor_block_8regs); \ xor_speed(&xor_block_32regs); \ NEON_TEMPLATES; \ } while (0) #ifdef CONFIG_KERNEL_MODE_NEON extern struct xor_block_template const xor_block_neon_inner; static void xor_neon_2(unsigned long bytes, unsigned long *p1, unsigned long *p2) { if (in_interrupt()) { xor_arm4regs_2(bytes, p1, p2); } else { kernel_neon_begin(); xor_block_neon_inner.do_2(bytes, p1, p2); kernel_neon_end(); } } static void xor_neon_3(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3) { if (in_interrupt()) { xor_arm4regs_3(bytes, p1, p2, p3); } else { kernel_neon_begin(); xor_block_neon_inner.do_3(bytes, p1, p2, p3); kernel_neon_end(); } } static void xor_neon_4(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4) { if (in_interrupt()) { xor_arm4regs_4(bytes, p1, p2, p3, p4); } else { kernel_neon_begin(); xor_block_neon_inner.do_4(bytes, p1, p2, p3, p4); kernel_neon_end(); } } static void xor_neon_5(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4, unsigned long *p5) { if (in_interrupt()) { xor_arm4regs_5(bytes, p1, p2, p3, p4, p5); } else { kernel_neon_begin(); xor_block_neon_inner.do_5(bytes, p1, p2, p3, p4, p5); kernel_neon_end(); } } static struct xor_block_template xor_block_neon = { .name = "neon", .do_2 = xor_neon_2, .do_3 = xor_neon_3, .do_4 = xor_neon_4, .do_5 = xor_neon_5 }; #define NEON_TEMPLATES \ do { if (cpu_has_neon()) xor_speed(&xor_block_neon); } while (0) #else #define NEON_TEMPLATES #endif |