| 1 | /* |
| 2 | * Copyright(c) 2019-2023 Qualcomm Innovation Center, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | #include <stdint.h> |
| 20 | |
| 21 | int err; |
| 22 | |
| 23 | #include "hex_test.h" |
| 24 | |
| 25 | static uint32_t preg_alias(uint8_t v0, uint8_t v1, uint8_t v2, uint8_t v3) |
| 26 | { |
| 27 | uint32_t ret; |
| 28 | asm volatile("p0 = %1\n\t" |
| 29 | "p1 = %2\n\t" |
| 30 | "p2 = %3\n\t" |
| 31 | "p3 = %4\n\t" |
| 32 | "%0 = C4\n" |
| 33 | : "=r"(ret) |
| 34 | : "r"(v0), "r"(v1), "r"(v2), "r"(v3) |
| 35 | : "p0", "p1", "p2", "p3"); |
| 36 | return ret; |
| 37 | } |
| 38 | |
| 39 | static uint32_t preg_alias_pair(uint8_t v0, uint8_t v1, uint8_t v2, uint8_t v3) |
| 40 | { |
| 41 | uint64_t c54; |
| 42 | asm volatile("p0 = %1\n\t" |
| 43 | "p1 = %2\n\t" |
| 44 | "p2 = %3\n\t" |
| 45 | "p3 = %4\n\t" |
| 46 | "%0 = C5:4\n" |
| 47 | : "=r"(c54) |
| 48 | : "r"(v0), "r"(v1), "r"(v2), "r"(v3) |
| 49 | : "p0", "p1", "p2", "p3"); |
| 50 | return (uint32_t)c54; |
| 51 | } |
| 52 | |
| 53 | typedef union { |
| 54 | uint32_t creg; |
| 55 | struct { |
| 56 | uint8_t p0; |
| 57 | uint8_t p1; |
| 58 | uint8_t p2; |
| 59 | uint8_t p3; |
| 60 | } pregs; |
| 61 | } PRegs; |
| 62 | |
| 63 | static inline void creg_alias(uint32_t cval, PRegs *pregs) |
| 64 | { |
| 65 | asm("c4 = %4\n\t" |
| 66 | "%0 = p0\n\t" |
| 67 | "%1 = p1\n\t" |
| 68 | "%2 = p2\n\t" |
| 69 | "%3 = p3\n\t" |
| 70 | : "=r"(pregs->pregs.p0), "=r"(pregs->pregs.p1), |
| 71 | "=r"(pregs->pregs.p2), "=r"(pregs->pregs.p3) |
| 72 | : "r"(cval) |
| 73 | : "c4", "p0", "p1", "p2", "p3"); |
| 74 | } |
| 75 | |
| 76 | static inline void creg_alias_pair(uint32_t cval, PRegs *pregs) |
| 77 | { |
| 78 | uint64_t cval_pair = (0xdeadbeefULL << 32) | cval; |
| 79 | uint32_t c5; |
| 80 | |
| 81 | asm ("c5:4 = %5\n\t" |
| 82 | "%0 = p0\n\t" |
| 83 | "%1 = p1\n\t" |
| 84 | "%2 = p2\n\t" |
| 85 | "%3 = p3\n\t" |
| 86 | "%4 = c5\n\t" |
| 87 | : "=r"(pregs->pregs.p0), "=r"(pregs->pregs.p1), |
| 88 | "=r"(pregs->pregs.p2), "=r"(pregs->pregs.p3), "=r"(c5) |
| 89 | : "r"(cval_pair) |
| 90 | : "c4", "c5", "p0", "p1", "p2", "p3"); |
| 91 | |
| 92 | check32(c5, 0xdeadbeef); |
| 93 | } |
| 94 | |
| 95 | static void test_packet(void) |
| 96 | { |
| 97 | /* |
| 98 | * Test that setting c4 inside a packet doesn't impact the predicates |
| 99 | * that are read during the packet. |
| 100 | */ |
| 101 | |
| 102 | uint32_t result; |
| 103 | uint32_t old_val = 0x0000001c; |
| 104 | |
| 105 | /* Test a predicated register transfer */ |
| 106 | result = old_val; |
| 107 | asm ( |
| 108 | "c4 = %1\n\t" |
| 109 | "{\n\t" |
| 110 | " c4 = %2\n\t" |
| 111 | " if (!p2) %0 = %3\n\t" |
| 112 | "}\n\t" |
| 113 | : "+r"(result) |
| 114 | : "r"(0xffffffff), "r"(0xff00ffff), "r"(0x837ed653) |
| 115 | : "c4", "p0", "p1", "p2", "p3"); |
| 116 | check32(result, old_val); |
| 117 | |
| 118 | /* Test a predicated store */ |
| 119 | result = 0xffffffff; |
| 120 | asm ("c4 = %0\n\t" |
| 121 | "{\n\t" |
| 122 | " c4 = %1\n\t" |
| 123 | " if (!p2) memw(%2) = #0\n\t" |
| 124 | "}\n\t" |
| 125 | : |
| 126 | : "r"(0), "r"(0xffffffff), "r"(&result) |
| 127 | : "c4", "p0", "p1", "p2", "p3", "memory"); |
| 128 | check32(result, 0x0); |
| 129 | } |
| 130 | |
| 131 | int main() |
| 132 | { |
| 133 | uint32_t c4; |
| 134 | PRegs pregs; |
| 135 | |
| 136 | c4 = preg_alias(0xff, 0x00, 0xff, 0x00); |
| 137 | check32(c4, 0x00ff00ff); |
| 138 | c4 = preg_alias(0xff, 0x00, 0x00, 0x00); |
| 139 | check32(c4, 0x000000ff); |
| 140 | c4 = preg_alias(0x00, 0xff, 0x00, 0x00); |
| 141 | check32(c4, 0x0000ff00); |
| 142 | c4 = preg_alias(0x00, 0x00, 0xff, 0x00); |
| 143 | check32(c4, 0x00ff0000); |
| 144 | c4 = preg_alias(0x00, 0x00, 0x00, 0xff); |
| 145 | check32(c4, 0xff000000); |
| 146 | c4 = preg_alias(0xff, 0xff, 0xff, 0xff); |
| 147 | check32(c4, 0xffffffff); |
| 148 | |
| 149 | c4 = preg_alias_pair(0xff, 0x00, 0xff, 0x00); |
| 150 | check32(c4, 0x00ff00ff); |
| 151 | c4 = preg_alias_pair(0xff, 0x00, 0x00, 0x00); |
| 152 | check32(c4, 0x000000ff); |
| 153 | c4 = preg_alias_pair(0x00, 0xff, 0x00, 0x00); |
| 154 | check32(c4, 0x0000ff00); |
| 155 | c4 = preg_alias_pair(0x00, 0x00, 0xff, 0x00); |
| 156 | check32(c4, 0x00ff0000); |
| 157 | c4 = preg_alias_pair(0x00, 0x00, 0x00, 0xff); |
| 158 | check32(c4, 0xff000000); |
| 159 | c4 = preg_alias_pair(0xff, 0xff, 0xff, 0xff); |
| 160 | check32(c4, 0xffffffff); |
| 161 | |
| 162 | creg_alias(0x00ff00ff, &pregs); |
| 163 | check32(pregs.creg, 0x00ff00ff); |
| 164 | creg_alias(0x00ffff00, &pregs); |
| 165 | check32(pregs.creg, 0x00ffff00); |
| 166 | creg_alias(0x00000000, &pregs); |
| 167 | check32(pregs.creg, 0x00000000); |
| 168 | creg_alias(0xff000000, &pregs); |
| 169 | check32(pregs.creg, 0xff000000); |
| 170 | creg_alias(0x00ff0000, &pregs); |
| 171 | check32(pregs.creg, 0x00ff0000); |
| 172 | creg_alias(0x0000ff00, &pregs); |
| 173 | check32(pregs.creg, 0x0000ff00); |
| 174 | creg_alias(0x000000ff, &pregs); |
| 175 | check32(pregs.creg, 0x000000ff); |
| 176 | creg_alias(0xffffffff, &pregs); |
| 177 | check32(pregs.creg, 0xffffffff); |
| 178 | |
| 179 | creg_alias_pair(0x00ff00ff, &pregs); |
| 180 | check32(pregs.creg, 0x00ff00ff); |
| 181 | creg_alias_pair(0x00ffff00, &pregs); |
| 182 | check32(pregs.creg, 0x00ffff00); |
| 183 | creg_alias_pair(0x00000000, &pregs); |
| 184 | check32(pregs.creg, 0x00000000); |
| 185 | creg_alias_pair(0xff000000, &pregs); |
| 186 | check32(pregs.creg, 0xff000000); |
| 187 | creg_alias_pair(0x00ff0000, &pregs); |
| 188 | check32(pregs.creg, 0x00ff0000); |
| 189 | creg_alias_pair(0x0000ff00, &pregs); |
| 190 | check32(pregs.creg, 0x0000ff00); |
| 191 | creg_alias_pair(0x000000ff, &pregs); |
| 192 | check32(pregs.creg, 0x000000ff); |
| 193 | creg_alias_pair(0xffffffff, &pregs); |
| 194 | check32(pregs.creg, 0xffffffff); |
| 195 | |
| 196 | test_packet(); |
| 197 | |
| 198 | puts(err ? "FAIL" : "PASS"); |
| 199 | return err; |
| 200 | } |