///////////////////////////////////////////////////////////////////////// // $Id: cpuid.cc,v 1.75 2008-12-06 10:21:55 sshwarts Exp $ ///////////////////////////////////////////////////////////////////////// // // Copyright (c) 2007 Stanislav Shwartsman // Written by Stanislav Shwartsman [sshwarts at sourceforge net] // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Lesser General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library 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 // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA // ///////////////////////////////////////////////////////////////////////// #define NEED_CPU_REG_SHORTCUTS 1 #include "bochs.h" #include "cpu.h" #define LOG_THIS BX_CPU_THIS_PTR #if BX_SUPPORT_X86_64==0 // Make life easier for merging code. #define RAX EAX #define RBX EBX #define RCX ECX #define RDX EDX #endif /* Get CPU version information. */ Bit32u BX_CPU_C::get_cpu_version_information(void) { Bit32u family = 0, model = 0, stepping = 0; Bit32u extended_model = 0; Bit32u extended_family = 0; #if BX_CPU_LEVEL > 3 /* ****** */ /* i486 */ /* ****** */ #if BX_CPU_LEVEL == 4 family = 4; #if BX_SUPPORT_FPU model = 1; // 486dx stepping = 3; #else model = 2; // 486sx stepping = 3; #endif /* **************** */ /* i586 (Pentium) */ /* **************** */ #elif BX_CPU_LEVEL == 5 family = 5; #if BX_SUPPORT_MMX model = 4; // Pentium MMX #else model = 1; // Pentium 60/66 #endif stepping = 3; /* ****** */ /* i686 */ /* ****** */ #elif BX_CPU_LEVEL == 6 #if BX_SUPPORT_SSE >= 2 // Pentium 4 processor /* The model, family, and processor type for the first processor in the Intel Pentium 4 family is as follows: * Model-0000B * Family-1111B * Processor Type-00B (OEM) * Stepping-0B */ model = 0; family = 0xf; stepping = 0; #if BX_SUPPORT_X86_64 model = 2; // Hammer returns what? #endif #else // Pentium Pro/Pentium II/Pentium III processor family = 6; model = 8; stepping = 3; #endif #else BX_PANIC(("CPUID family ID not implemented for CPU LEVEL > 6")); #endif #endif // BX_CPU_LEVEL > 3 return (extended_family << 20) | (extended_model << 16) | (family << 8) | (model<<4) | stepping; } /* Get CPU extended feature flags. */ Bit32u BX_CPU_C::get_extended_cpuid_features(void) { // [0:0] SSE3: SSE3 Instructions // [1:1] PCLMULQDQ Instruction support // [2:2] reserved // [3:3] MONITOR/MWAIT support // [4:4] DS-CPL: CPL qualified debug store // [5:5] VMX: Virtual Machine Technology // [6:6] SMX: Secure Virtual Machine Technology // [7:7] EST: Enhanced Intel SpeedStep Technology // [8:8] TM2: Thermal Monitor 2 // [9:9] SSE3E: SSE3E Instructions (Intel Core Duo 2 new instructions) // [10:10] CNXT-ID: L1 context ID // [11:11] reserved // [12:12] FMA Instructions support // [13:13] CMPXCHG16B: CMPXCHG16B instruction support // [14:14] xTPR update control // [17:15] reserved // [18:18] DCA - Direct Cache Access // [19:19] SSE4.1 Instructions // [20:20] SSE4.2 Instructions // [21:22] X2APIC // [22:22] MOVBE instruction // [23:23] POPCNT instruction // [24:24] reserved // [25:25] AES Instructions // [26:26] XSAVE extensions support // [27:27] OSXSAVE support // [28:28] AVX extensions support // [31:29] reserved Bit32u features = 0; #if BX_SUPPORT_SSE >= 3 features |= 0x1; // support SSE3 #endif #if BX_SUPPORT_MONITOR_MWAIT features |= (1<<3); // support MONITOR/MWAIT #endif #if (BX_SUPPORT_SSE >= 4) || (BX_SUPPORT_SSE >= 3 && BX_SUPPORT_SSE_EXTENSION > 0) features |= (1<<9); // support SSE3E #endif #if BX_SUPPORT_X86_64 features |= (1<<13); // support CMPXCHG16B #endif #if BX_SUPPORT_SSE >= 4 features |= (1<<19); // support SSE4.1 #endif #if (BX_SUPPORT_SSE > 4) || (BX_SUPPORT_SSE >= 4 && BX_SUPPORT_SSE_EXTENSION > 0) features |= (1<<20); // support SSE4.2 #endif #if BX_SUPPORT_MOVBE features |= (1<<22); // support MOVBE instruction #endif #if BX_SUPPORT_POPCNT || (BX_SUPPORT_SSE > 4) || (BX_SUPPORT_SSE >= 4 && BX_SUPPORT_SSE_EXTENSION > 0) features |= (1<<23); // support POPCNT instruction #endif #if BX_SUPPORT_AES features |= (1<<25); // support AES instructions #endif #if BX_SUPPORT_XSAVE features |= (1<<26) | (1<<27); // support XSAVE extensions #endif return features; } /* Get CPU feature flags. Returned by CPUID functions 1 and 80000001. */ Bit32u BX_CPU_C::get_std_cpuid_features(void) { Bit32u features = 0; #if BX_SUPPORT_FPU features |= (1<<0); #endif #if BX_SUPPORT_VME features |= (1<<1); #endif #if (BX_CPU_LEVEL >= 5) features |= (1<<4); // implement TSC features |= (1<<5); // support RDMSR/WRMSR features |= (1<<8); // Support CMPXCHG8B instruction #if BX_SUPPORT_MMX features |= (1<<23); // support MMX #endif #endif #if BX_CPU_LEVEL >= 6 features |= (1<<24); // Implement FSAVE/FXRSTOR instructions. #endif #if BX_SUPPORT_CLFLUSH features |= (1<<19); // Implement CLFLUSH instruction #endif #if BX_CPU_LEVEL >= 6 features |= (1<<15); // Implement CMOV instructions. #if BX_SUPPORT_APIC // if MSR_APICBASE APIC Global Enable bit has been cleared, // the CPUID feature flag for the APIC is set to 0. if (BX_CPU_THIS_PTR msr.apicbase & 0x800) features |= (1<<9); // APIC on chip #endif #if BX_SUPPORT_SSE >= 1 features |= (1<<25); // support SSE #endif #if BX_SUPPORT_SSE >= 2 features |= (1<<26); // support SSE2 #endif #endif #if BX_SUPPORT_SEP features |= (1<<11); // SYSENTER/SYSEXIT #endif #if BX_SUPPORT_MTRR features |= (1<<12); // Implement MTRRs #endif #if BX_SUPPORT_LARGE_PAGES features |= (1<< 3); // Support Page-Size Extension (2M/4M pages) #endif #if BX_SUPPORT_GLOBAL_PAGES features |= (1<<13); // Support Global pages #endif #if BX_SUPPORT_PAE features |= (1<<6); // Support PAE #endif #if BX_SUPPORT_SMP // Intel(R) HyperThreading Technology if (SIM->get_param_num(BXPN_CPU_NTHREADS)->get() > 1) features |= (1<<28); #endif return features; } void BX_CPP_AttrRegparmN(1) BX_CPU_C::CPUID(bxInstruction_c *i) { #if BX_CPU_LEVEL >= 4 Bit32u function = EAX; #if BX_SUPPORT_XSAVE Bit32u subfunction = ECX; #endif if(function < 0x80000000) { if(function < MAX_STD_CPUID_FUNCTION) { RAX = BX_CPU_THIS_PTR cpuid_std_function[function].eax; RBX = BX_CPU_THIS_PTR cpuid_std_function[function].ebx; RCX = BX_CPU_THIS_PTR cpuid_std_function[function].ecx; RDX = BX_CPU_THIS_PTR cpuid_std_function[function].edx; #if BX_SUPPORT_APIC if (function == 1) { // if MSR_APICBASE APIC Global Enable bit has been cleared, // the CPUID feature flag for the APIC is set to 0. if ((BX_CPU_THIS_PTR msr.apicbase & 0x800) == 0) RDX &= ~(1<<9); // APIC on chip } #endif #if BX_SUPPORT_XSAVE if (function == 0xD && subfunction > 0) { RAX = 0; RBX = 0; RCX = 0; RDX = 0; } #endif return; } } else { function -= 0x80000000; if(function < MAX_EXT_CPUID_FUNCTION) { RAX = BX_CPU_THIS_PTR cpuid_ext_function[function].eax; RBX = BX_CPU_THIS_PTR cpuid_ext_function[function].ebx; RCX = BX_CPU_THIS_PTR cpuid_ext_function[function].ecx; RDX = BX_CPU_THIS_PTR cpuid_ext_function[function].edx; #if BX_SUPPORT_APIC if (function == 1) { // if MSR_APICBASE APIC Global Enable bit has been cleared, // the CPUID feature flag for the APIC is set to 0. if ((BX_CPU_THIS_PTR msr.apicbase & 0x800) == 0) RDX &= ~(1<<9); // APIC on chip } #endif return; } } // unknown CPUID function RAX = 0; RBX = 0; RCX = 0; RDX = 0; #else BX_INFO(("CPUID: not available on < 486")); exception(BX_UD_EXCEPTION, 0, 0); #endif } void BX_CPU_C::set_cpuid_defaults(void) { Bit8u *vendor_string = (Bit8u *)SIM->get_param_string(BXPN_VENDOR_STRING)->getptr(); Bit8u *brand_string = (Bit8u *)SIM->get_param_string(BXPN_BRAND_STRING)->getptr(); bool cpuid_limit_winnt = SIM->get_param_bool(BXPN_CPUID_LIMIT_WINNT)->get(); cpuid_function_t *cpuid; int i; for (i=0;ieax = 1; #else // for Pentium Pro, Pentium II, Pentium 4 processors cpuid->eax = 2; // do not report CPUID functions above 0x3 if cpuid_limit_winnt is set // to workaround WinNT issue. if (! cpuid_limit_winnt) { if (BX_SUPPORT_MONITOR_MWAIT) cpuid->eax = 0x5; if (BX_SUPPORT_XSAVE) cpuid->eax = 0xD; } #endif // CPUID vendor string (e.g. GenuineIntel, AuthenticAMD, CentaurHauls, ...) memcpy(&(cpuid->ebx), vendor_string , 4); memcpy(&(cpuid->edx), vendor_string + 4, 4); memcpy(&(cpuid->ecx), vendor_string + 8, 4); // ------------------------------------------------------ // CPUID function 0x00000001 cpuid = &(BX_CPU_THIS_PTR cpuid_std_function[1]); // EAX: CPU Version Information // [3:0] Stepping ID // [7:4] Model: starts at 1 // [11:8] Family: 4=486, 5=Pentium, 6=PPro, ... // [13:12] Type: 0=OEM, 1=overdrive, 2=dual cpu, 3=reserved // [31:14] Reserved cpuid->eax = get_cpu_version_information(); // EBX: // [7:0] Brand ID // [15:8] CLFLUSH cache line size (value*8 = cache line size in bytes) // [23:16] Number of logical processors in one physical processor // [31:24] Local Apic ID cpuid->ebx = 0; #if BX_SUPPORT_APIC cpuid->ebx |= (BX_CPU_THIS_PTR local_apic.get_id() << 24); #endif #if BX_SUPPORT_CLFLUSH cpuid->ebx |= (CACHE_LINE_SIZE / 8) << 8; #endif #if BX_SUPPORT_SMP unsigned n_logical_processors = SIM->get_param_num(BXPN_CPU_NCORES)->get()*SIM->get_param_num(BXPN_CPU_NTHREADS)->get(); if (n_logical_processors > 1) cpuid->ebx |= (n_logical_processors << 16); #endif // ECX: Extended Feature Flags // [0:0] SSE3: SSE3 Instructions // [1:1] PCLMULQDQ Instruction support // [2:2] reserved // [3:3] MONITOR/MWAIT support // [4:4] DS-CPL: CPL qualified debug store // [5:5] VMX: Virtual Machine Technology // [6:6] SMX: Secure Virtual Machine Technology // [7:7] EST: Enhanced Intel SpeedStep Technology // [8:8] TM2: Thermal Monitor 2 // [9:9] SSE3E: SSE3E Instructions (Intel Core Duo 2 new instructions) // [10:10] CNXT-ID: L1 context ID // [11:11] reserved // [12:12] FMA Instructions support // [13:13] CMPXCHG16B: CMPXCHG16B instruction support // [14:14] xTPR update control // [17:15] reserved // [18:18] DCA - Direct Cache Access // [19:19] SSE4.1 Instructions // [20:20] SSE4.2 Instructions // [21:22] X2APIC // [22:22] Reserved // [23:23] POPCNT instruction // [24:24] reserved // [25:25] AES Instructions // [26:26] XSAVE extensions support // [27:27] OSXSAVE support // [28:28] AVX extensions support // [31:29] reserved cpuid->ecx = get_extended_cpuid_features(); // EDX: Feature Flags // [0:0] FPU on chip // [1:1] VME: Virtual-8086 Mode enhancements // [2:2] DE: Debug Extensions (I/O breakpoints) // [3:3] PSE: Page Size Extensions // [4:4] TSC: Time Stamp Counter // [5:5] MSR: RDMSR and WRMSR support // [6:6] PAE: Physical Address Extensions // [7:7] MCE: Machine Check Exception // [8:8] CXS: CMPXCHG8B instruction // [9:9] APIC: APIC on Chip // [10:10] Reserved // [11:11] SYSENTER/SYSEXIT support // [12:12] MTRR: Memory Type Range Reg // [13:13] PGE/PTE Global Bit // [14:14] MCA: Machine Check Architecture // [15:15] CMOV: Cond Mov/Cmp Instructions // [16:16] PAT: Page Attribute Table // [17:17] PSE-36: Physical Address Extensions // [18:18] Processor Serial Number // [19:19] CLFLUSH: CLFLUSH Instruction support // [20:20] Reserved // [21:21] DS: Debug Store // [22:22] ACPI: Thermal Monitor and Software Controlled Clock Facilities // [23:23] MMX Technology // [24:24] FXSR: FXSAVE/FXRSTOR (also indicates CR4.OSFXSR is available) // [25:25] SSE: SSE Extensions // [26:26] SSE2: SSE2 Extensions // [27:27] Reserved // [28:28] Hyper Threading Technology // [29:29] TM: Thermal Monitor // [30:30] Reserved // [31:31] PBE: Pending Break Enable cpuid->edx = get_std_cpuid_features(); #if BX_CPU_LEVEL >= 6 // ------------------------------------------------------ // CPUID function 0x00000002 - Cache and TLB Descriptors cpuid = &(BX_CPU_THIS_PTR cpuid_std_function[2]); #if BX_CPU_VENDOR_INTEL cpuid->eax = 0x00410601; // for Pentium Pro compatibility cpuid->ebx = 0; cpuid->ecx = 0; cpuid->edx = 0; #else cpuid->eax = 0; // ignore for AMD cpuid->ebx = 0; cpuid->ecx = 0; cpuid->edx = 0; #endif // ------------------------------------------------------ // CPUID function 0x00000003 - Processor Serial Number cpuid = &(BX_CPU_THIS_PTR cpuid_std_function[3]); cpuid->eax = 0; cpuid->ebx = 0; cpuid->ecx = 0; cpuid->edx = 0; // do not report CPUID functions above 0x3 if cpuid_limit_winnt is set // to workaround WinNT issue. if (cpuid_limit_winnt) return; // ------------------------------------------------------ // CPUID function 0x00000004 - Deterministic Cache Parameters cpuid = &(BX_CPU_THIS_PTR cpuid_std_function[4]); cpuid->eax = 0; cpuid->ebx = 0; cpuid->ecx = 0; cpuid->edx = 0; #if BX_SUPPORT_MONITOR_MWAIT // ------------------------------------------------------ // CPUID function 0x00000005 cpuid = &(BX_CPU_THIS_PTR cpuid_std_function[5]); // EAX - Smallest monitor-line size in bytes // EBX - Largest monitor-line size in bytes // ECX - // [31:2] - reserved // [1:1] - exit MWAIT even with EFLAGS.IF = 0 // [0:0] - MONITOR/MWAIT extensions are supported // EDX - Reserved cpuid->eax = CACHE_LINE_SIZE; cpuid->ebx = CACHE_LINE_SIZE; cpuid->ecx = 3; cpuid->edx = 0; #endif #if BX_SUPPORT_XSAVE // ------------------------------------------------------ // CPUID function 0x0000000D cpuid = &(BX_CPU_THIS_PTR cpuid_std_function[0xD]); // EAX - XCR0 lower 32 bits // EBX - Maximum size (in bytes) required by enabled features // ECX - Maximum size (in bytes) required by CPU supported features // EDX - XCR0 upper 32 bits cpuid->eax = BX_CPU_THIS_PTR xcr0.get32(); cpuid->ebx = 512+64; cpuid->ecx = 512+64; cpuid->edx = 0; #endif #if BX_SUPPORT_SSE >= 2 // report Pentium 4 extended functions // ------------------------------------------------------ // CPUID function 0x80000000 cpuid = &(BX_CPU_THIS_PTR cpuid_ext_function[0]); // EAX: highest input value understood by CPUID // EBX: vendor ID string // EDX: vendor ID string // ECX: vendor ID string cpuid->eax = BX_SUPPORT_X86_64 ? 0x80000008 : 0x80000004; #if BX_CPU_VENDOR_INTEL cpuid->ebx = 0; cpuid->edx = 0; // Reserved for Intel cpuid->ecx = 0; #else memcpy(&(cpuid->ebx), vendor_string , 4); memcpy(&(cpuid->edx), vendor_string + 4, 4); memcpy(&(cpuid->ecx), vendor_string + 8, 4); #endif // ------------------------------------------------------ // CPUID function 0x80000001 cpuid = &(BX_CPU_THIS_PTR cpuid_ext_function[1]); // EAX: CPU Version Information cpuid->eax = BX_CPU_VENDOR_INTEL ? 0 : get_cpu_version_information(); // EBX: Brand ID cpuid->ebx = 0; // ECX: // [0:0] LAHF/SAHF available in 64-bit mode // [1:1] AMD CmpLegacy // [2:2] AMD Secure Virtual Machine Technology // [3:3] Extended APIC Space // [4:4] Alternative CR8 (treat lock mov cr0 as mov cr8) // [5:5] LZCNT support // [6:6] SSE4A support // [7:7] Misaligned SSE support // [8:8] 3DNow! prefetch support // [9:9] OS visible workarounds // [10:10] Reserved // [11:11] SSE5A // [12:31] Reserved #if BX_SUPPORT_X86_64 cpuid->ecx = 1 | (1<<8); #endif #if BX_SUPPORT_MISALIGNED_SSE cpuid->ecx |= (1<<7); #endif // EDX: // Many of the bits in EDX are the same as EAX [*] for AMD // [*] [0:0] FPU on chip // [*] [1:1] VME: Virtual-8086 Mode enhancements // [*] [2:2] DE: Debug Extensions (I/O breakpoints) // [*] [3:3] PSE: Page Size Extensions // [*] [4:4] TSC: Time Stamp Counter // [*] [5:5] MSR: RDMSR and WRMSR support // [*] [6:6] PAE: Physical Address Extensions // [*] [7:7] MCE: Machine Check Exception // [*] [8:8] CXS: CMPXCHG8B instruction // [*] [9:9] APIC: APIC on Chip // [10:10] Reserved // [11:11] SYSCALL/SYSRET support // [*] [12:12] MTRR: Memory Type Range Reg // [*] [13:13] PGE/PTE Global Bit // [*] [14:14] MCA: Machine Check Architecture // [*] [15:15] CMOV: Cond Mov/Cmp Instructions // [*] [16:16] PAT: Page Attribute Table // [*] [17:17] PSE-36: Physical Address Extensions // [18:19] Reserved // [20:20] No-Execute page protection // [21:21] Reserved // [22:22] AMD MMX Extensions // [*] [23:23] MMX Technology // [*] [24:24] FXSR: FXSAVE/FXRSTOR (also indicates CR4.OSFXSR is available) // [25:25] Fast FXSAVE/FXRSTOR mode support // [26:26] 1G paging support // [27:27] Support RDTSCP Instruction // [28:28] Reserved // [29:29] Long Mode // [30:30] AMD 3DNow! Extensions // [31:31] AMD 3DNow! Instructions unsigned features = BX_CPU_VENDOR_INTEL ? 0 : get_std_cpuid_features(); features &= 0x0183F3FF; #if BX_SUPPORT_3DNOW features |= (1 << 22) | (1 << 30) | (1 << 31); // only AMD is interesting in AMD MMX extensions #endif #if BX_SUPPORT_X86_64 features |= (1 << 29) | (1 << 27) | (1 << 25) | (1 << 20) | (1 << 11); #endif cpuid->edx = features; // Processor Brand String, use the value that is returned // by the first processor in the Pentium 4 family // (according to Intel manual or the AMD manual) // ------------------------------------------------------ // CPUID function 0x80000002 cpuid = &(BX_CPU_THIS_PTR cpuid_ext_function[2]); memcpy(&(cpuid->eax), brand_string , 4); memcpy(&(cpuid->ebx), brand_string + 4, 4); memcpy(&(cpuid->ecx), brand_string + 8, 4); memcpy(&(cpuid->edx), brand_string + 12, 4); // CPUID function 0x80000003 cpuid = &(BX_CPU_THIS_PTR cpuid_ext_function[3]); memcpy(&(cpuid->eax), brand_string + 16, 4); memcpy(&(cpuid->ebx), brand_string + 20, 4); memcpy(&(cpuid->ecx), brand_string + 24, 4); memcpy(&(cpuid->edx), brand_string + 28, 4); // CPUID function 0x80000004 cpuid = &(BX_CPU_THIS_PTR cpuid_ext_function[4]); memcpy(&(cpuid->eax), brand_string + 32, 4); memcpy(&(cpuid->ebx), brand_string + 36, 4); memcpy(&(cpuid->ecx), brand_string + 40, 4); memcpy(&(cpuid->edx), brand_string + 44, 4); #if BX_SUPPORT_X86_64 // ------------------------------------------------------ // CPUID function 0x80000005 cpuid = &(BX_CPU_THIS_PTR cpuid_ext_function[5]); /* cache info (L1 cache) */ cpuid->eax = 0x01ff01ff; cpuid->ebx = 0x01ff01ff; cpuid->ecx = 0x40020140; cpuid->edx = 0x40020140; // ------------------------------------------------------ // CPUID function 0x80000006 cpuid = &(BX_CPU_THIS_PTR cpuid_ext_function[6]); /* cache info (L2 cache) */ cpuid->eax = 0; cpuid->ebx = 0x42004200; cpuid->ecx = 0x02008140; cpuid->edx = 0; // ------------------------------------------------------ // CPUID function 0x00000007 cpuid = &(BX_CPU_THIS_PTR cpuid_ext_function[7]); cpuid->eax = 0; cpuid->ebx = 0; cpuid->ecx = 0; cpuid->edx = 0; // ------------------------------------------------------ // CPUID function 0x80000008 cpuid = &(BX_CPU_THIS_PTR cpuid_ext_function[8]); // virtual & phys address size in low 2 bytes. cpuid->eax = BX_PHY_ADDRESS_WIDTH | (BX_LIN_ADDRESS_WIDTH << 8); cpuid->ebx = 0; cpuid->ecx = 0; // Reserved, undefined cpuid->edx = 0; #endif // BX_SUPPORT_X86_64 #endif // BX_SUPPORT_SSE >= 2 #endif // BX_CPU_LEVEL >= 6 }