diff options
Diffstat (limited to 'FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/cpuid.c')
-rw-r--r-- | FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/cpuid.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/cpuid.c b/FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/cpuid.c new file mode 100644 index 000000000..85c4bf2d6 --- /dev/null +++ b/FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/cpuid.c @@ -0,0 +1,110 @@ +/* cpuid.c + * + * Copyright (C) 2006-2020 wolfSSL Inc. + * + * This file is part of wolfSSL. + * + * wolfSSL is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * wolfSSL is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA + */ + + +#ifdef HAVE_CONFIG_H + #include <config.h> +#endif + +#include <wolfssl/wolfcrypt/settings.h> + +#include <wolfssl/wolfcrypt/cpuid.h> + +#if (defined(WOLFSSL_X86_64_BUILD) || defined(USE_INTEL_SPEEDUP) || \ + defined(WOLFSSL_AESNI)) && !defined(WOLFSSL_NO_ASM) + /* Each platform needs to query info type 1 from cpuid to see if aesni is + * supported. Also, let's setup a macro for proper linkage w/o ABI conflicts + */ + + #ifndef _MSC_VER + #define cpuid(reg, leaf, sub)\ + __asm__ __volatile__ ("cpuid":\ + "=a" (reg[0]), "=b" (reg[1]), "=c" (reg[2]), "=d" (reg[3]) :\ + "a" (leaf), "c"(sub)); + + #define XASM_LINK(f) asm(f) + #else + #include <intrin.h> + + #define cpuid(a,b,c) __cpuidex((int*)a,b,c) + + #define XASM_LINK(f) + #endif /* _MSC_VER */ + + #define EAX 0 + #define EBX 1 + #define ECX 2 + #define EDX 3 + + static word32 cpuid_check = 0; + static word32 cpuid_flags = 0; + + static word32 cpuid_flag(word32 leaf, word32 sub, word32 num, word32 bit) + { + int got_intel_cpu = 0; + int got_amd_cpu = 0; + unsigned int reg[5]; + reg[4] = '\0'; + cpuid(reg, 0, 0); + + /* check for Intel cpu */ + if (XMEMCMP((char *)&(reg[EBX]), "Genu", 4) == 0 && + XMEMCMP((char *)&(reg[EDX]), "ineI", 4) == 0 && + XMEMCMP((char *)&(reg[ECX]), "ntel", 4) == 0) { + got_intel_cpu = 1; + } + + /* check for AMD cpu */ + if (XMEMCMP((char *)&(reg[EBX]), "Auth", 4) == 0 && + XMEMCMP((char *)&(reg[EDX]), "enti", 4) == 0 && + XMEMCMP((char *)&(reg[ECX]), "cAMD", 4) == 0) { + got_amd_cpu = 1; + } + + if (got_intel_cpu || got_amd_cpu) { + cpuid(reg, leaf, sub); + return ((reg[num] >> bit) & 0x1); + } + return 0; + } + + + void cpuid_set_flags(void) + { + if (!cpuid_check) { + if (cpuid_flag(1, 0, ECX, 28)) { cpuid_flags |= CPUID_AVX1 ; } + if (cpuid_flag(7, 0, EBX, 5)) { cpuid_flags |= CPUID_AVX2 ; } + if (cpuid_flag(7, 0, EBX, 8)) { cpuid_flags |= CPUID_BMI2 ; } + if (cpuid_flag(1, 0, ECX, 30)) { cpuid_flags |= CPUID_RDRAND; } + if (cpuid_flag(7, 0, EBX, 18)) { cpuid_flags |= CPUID_RDSEED; } + if (cpuid_flag(1, 0, ECX, 25)) { cpuid_flags |= CPUID_AESNI ; } + if (cpuid_flag(7, 0, EBX, 19)) { cpuid_flags |= CPUID_ADX ; } + cpuid_check = 1; + } + } + + word32 cpuid_get_flags(void) + { + if (!cpuid_check) + cpuid_set_flags(); + return cpuid_flags; + } +#endif |