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Bochs/bochs/cpu/cpuid.cc
Stanislav Shwartsman 7254ea36a1 copyright fixes + small optimization
2009-10-14 20:45:29 +00:00

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/////////////////////////////////////////////////////////////////////////
// $Id: cpuid.cc,v 1.86 2009-10-14 20:45:29 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2007-2009 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., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 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
// [21:21] 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_VMX
features |= (1<<5); // support VMX
#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)
{
// [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
Bit32u features = 0;
#if BX_SUPPORT_FPU
features |= (1<<0);
#endif
#if BX_CPU_LEVEL >= 5
features |= (1<<1);
#endif
features |= (1<<2); // support Debug Extensions
#if BX_CPU_LEVEL >= 5
features |= (1<<4); // support Time Stamp Counter
features |= (1<<5); // support RDMSR/WRMSR
features |= (1<<7) | (1<<14); // support Machine Check
features |= (1<<8); // support CMPXCHG8B instruction
#endif
#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_SEP
features |= (1<<11); // SYSENTER/SYSEXIT
#endif
#if BX_SUPPORT_CLFLUSH
features |= (1<<19); // Implement CLFLUSH instruction
#endif
#if BX_SUPPORT_MMX
features |= (1<<23); // support MMX
#endif
#if BX_CPU_LEVEL >= 6
features |= (1<<24); // Implement FSAVE/FXRSTOR instructions.
#endif
#if BX_SUPPORT_SSE >= 1
features |= (1<<25); // support SSE
#endif
#if BX_SUPPORT_SSE >= 2
features |= (1<<26); // support SSE2
#endif
#if BX_CPU_LEVEL >= 6
features |= (1<<15); // Implement CMOV instructions.
#endif
#if BX_CPU_LEVEL >= 5
features |= (1<<3); // support PSE
#endif
#if BX_CPU_LEVEL >= 6
features |= (1<<6); // support PAE
features |= (1<<12); // support MTRRs
features |= (1<<13); // support Global pages
features |= (1<<16); // support PAT
features |= (1<<17); // support PSE-36
#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 BX_SUPPORT_VMX
if (BX_CPU_THIS_PTR in_vmx_guest) {
BX_ERROR(("VMEXIT: CPUID in VMX non-root operation"));
VMexit(i, VMX_VMEXIT_CPUID, 0);
}
#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;i<MAX_STD_CPUID_FUNCTION;i++) {
BX_CPU_THIS_PTR cpuid_std_function[i].eax = 0;
BX_CPU_THIS_PTR cpuid_std_function[i].ebx = 0;
BX_CPU_THIS_PTR cpuid_std_function[i].ecx = 0;
BX_CPU_THIS_PTR cpuid_std_function[i].edx = 0;
}
for (i=0;i<MAX_EXT_CPUID_FUNCTION;i++) {
BX_CPU_THIS_PTR cpuid_ext_function[i].eax = 0;
BX_CPU_THIS_PTR cpuid_ext_function[i].ebx = 0;
BX_CPU_THIS_PTR cpuid_ext_function[i].ecx = 0;
BX_CPU_THIS_PTR cpuid_ext_function[i].edx = 0;
}
// ------------------------------------------------------
// CPUID function 0x00000000
cpuid = &(BX_CPU_THIS_PTR cpuid_std_function[0]);
// EAX: highest input value understood by CPUID
// EBX: vendor ID string
// EDX: vendor ID string
// ECX: vendor ID string
#if BX_CPU_LEVEL <= 5
// 486 and Pentium processors
cpuid->eax = 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 lapic.get_id() & 0xff) << 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
// [21:21] 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
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);
#if BX_SUPPORT_1G_PAGES
features |= (1 << 26);
#endif
#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
}
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