/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
//   Copyright (c) 2011 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
//
/////////////////////////////////////////////////////////////////////////

#include "bochs.h"
#include "cpu.h"
#include "pentium_mmx.h"

#define LOG_THIS cpu->

#if BX_CPU_LEVEL == 5

pentium_mmx_t::pentium_mmx_t(BX_CPU_C *cpu): bx_cpuid_t(cpu)
{
  if (BX_SUPPORT_X86_64)
    BX_PANIC(("x86-64 should be disabled for Pentium MMX configuration"));

  if (BX_CPU_LEVEL != 5)
    BX_PANIC(("Pentium MMX should be compiled with BX_CPU_LEVEL=5"));
}

void pentium_mmx_t::get_cpuid_leaf(Bit32u function, Bit32u subfunction, cpuid_function_t *leaf) const
{
  switch(function) {
  case 0x00000000:
    get_std_cpuid_leaf_0(leaf);
    return;
  case 0x00000001:
  default:
    get_std_cpuid_leaf_1(leaf);
    return;
  }
}

Bit32u pentium_mmx_t::get_isa_extensions_bitmask(void) const
{
  return BX_CPU_X87 |
         BX_CPU_486 |
         BX_CPU_PENTIUM |
         BX_CPU_MMX;
}

Bit32u pentium_mmx_t::get_cpu_extensions_bitmask(void) const
{
  return BX_CPU_DEBUG_EXTENSIONS |
         BX_CPU_VME |
#if BX_PHY_ADDRESS_LONG
         BX_CPU_PSE36 |
#endif
         BX_CPU_PSE;
}

// leaf 0x00000000 //
void pentium_mmx_t::get_std_cpuid_leaf_0(cpuid_function_t *leaf) const
{
  static const char* vendor_string = "GenuineIntel";

  // EAX: highest std function understood by CPUID
  // EBX: vendor ID string
  // EDX: vendor ID string
  // ECX: vendor ID string
  leaf->eax = 0x1;

  // CPUID vendor string (e.g. GenuineIntel, AuthenticAMD, CentaurHauls, ...)
  memcpy(&(leaf->ebx), vendor_string,     4);
  memcpy(&(leaf->edx), vendor_string + 4, 4);
  memcpy(&(leaf->ecx), vendor_string + 8, 4);
#ifdef BX_BIG_ENDIAN
  leaf->ebx = bx_bswap32(leaf->ebx);
  leaf->ecx = bx_bswap32(leaf->ecx);
  leaf->edx = bx_bswap32(leaf->edx);
#endif
}

// leaf 0x00000001 //
void pentium_mmx_t::get_std_cpuid_leaf_1(cpuid_function_t *leaf) const
{
  // 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
  //   [19:16] Extended Model
  //   [27:20] Extended Family
  leaf->eax = 0x00000543;

  leaf->ebx = 0;
  leaf->ecx = 0;

  // EDX: Standard 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] PSN: 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] Self Snoop
  //   [28:28] Hyper Threading Technology
  //   [29:29] TM: Thermal Monitor
  //   [30:30] Reserved
  //   [31:31] PBE: Pending Break Enable

  leaf->edx = BX_CPUID_STD_X87 |
              BX_CPUID_STD_VME |
              BX_CPUID_STD_DEBUG_EXTENSIONS |
              BX_CPUID_STD_PSE |
              BX_CPUID_STD_TSC |
              BX_CPUID_STD_MSR |
              BX_CPUID_STD_MCE |
              BX_CPUID_STD_CMPXCHG8B |
#if BX_PHY_ADDRESS_LONG
              BX_CPUID_STD_PSE36 |
#endif
              BX_CPUID_STD_MMX;
#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 (cpu->msr.apicbase & 0x800)
    leaf->edx |= BX_CPUID_STD_APIC; // APIC on chip
#endif
}

void pentium_mmx_t::dump_cpuid(void) const
{
  struct cpuid_function_t leaf;

  for (unsigned n=0; n<=0x1; n++) {
    get_cpuid_leaf(n, 0x00000000, &leaf);
    BX_INFO(("CPUID[0x%08x]: %08x %08x %08x %08x", n, leaf.eax, leaf.ebx, leaf.ecx, leaf.edx));
  }
}

bx_cpuid_t *create_pentium_mmx_cpuid(BX_CPU_C *cpu) { return new pentium_mmx_t(cpu); }

#endif