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Bochs/bochs/cpu/init.cc

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/////////////////////////////////////////////////////////////////////////
// $Id: init.cc,v 1.100 2006-04-25 14:42:57 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// 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
BX_CPU_C::BX_CPU_C(unsigned id): bx_cpuid(id)
#if BX_SUPPORT_APIC
,local_apic (this)
#endif
{
// in case of SMF, you cannot reference any member data
// in the constructor because the only access to it is via
// global variables which aren't initialized quite yet.
put("CPU");
settype (CPU0LOG);
}
#if BX_WITH_WX
#define IF_SEG_REG_GET(x) \
if (!strcmp(param->get_name(), #x)) { \
return BX_CPU(cpu)->sregs[BX_SEG_REG_##x].selector.value; \
}
#define IF_SEG_REG_SET(reg, val) \
if (!strcmp(param->get_name(), #reg)) { \
BX_CPU(cpu)->load_seg_reg(&BX_CPU(cpu)->sregs[BX_SEG_REG_##reg],val); \
}
#define IF_LAZY_EFLAG_GET(flag) \
if (!strcmp(param->get_name(), #flag)) { \
return BX_CPU(cpu)->get_##flag(); \
}
#define IF_LAZY_EFLAG_SET(flag, val) \
if (!strcmp(param->get_name(), #flag)) { \
BX_CPU(cpu)->set_##flag(val); \
}
#define IF_EFLAG_GET(flag) \
if (!strcmp(param->get_name(), #flag)) { \
return BX_CPU(cpu)->get_##flag(); \
}
#define IF_EFLAG_SET(flag, val) \
if (!strcmp(param->get_name(), #flag)) { \
BX_CPU(cpu)->set_##flag(val); \
}
// implement get/set handler for parameters that need unusual set/get
static Bit64s cpu_param_handler(bx_param_c *param, int set, Bit64s val)
{
#if BX_SUPPORT_SMP
int cpu = atoi(param->get_parent()->get_name());
#endif
if (set) {
if (!strcmp(param->get_name(), "LDTR")) {
BX_CPU(cpu)->panic("setting LDTR not implemented");
}
if (!strcmp(param->get_name(), "TR")) {
BX_CPU(cpu)->panic("setting LDTR not implemented");
}
IF_SEG_REG_SET(CS, val);
IF_SEG_REG_SET(DS, val);
IF_SEG_REG_SET(SS, val);
IF_SEG_REG_SET(ES, val);
IF_SEG_REG_SET(FS, val);
IF_SEG_REG_SET(GS, val);
IF_LAZY_EFLAG_SET(OF, val);
IF_LAZY_EFLAG_SET(SF, val);
IF_LAZY_EFLAG_SET(ZF, val);
IF_LAZY_EFLAG_SET(AF, val);
IF_LAZY_EFLAG_SET(PF, val);
IF_LAZY_EFLAG_SET(CF, val);
IF_EFLAG_SET(ID, val);
IF_EFLAG_SET(VIP, val);
IF_EFLAG_SET(VIF, val);
IF_EFLAG_SET(AC, val);
IF_EFLAG_SET(VM, val);
IF_EFLAG_SET(RF, val);
IF_EFLAG_SET(NT, val);
IF_EFLAG_SET(IOPL, val);
IF_EFLAG_SET(DF, val);
IF_EFLAG_SET(IF, val);
IF_EFLAG_SET(TF, val);
} else {
if (!strcmp(param->get_name(), "LDTR")) {
return BX_CPU(cpu)->ldtr.selector.value;
}
if (!strcmp(param->get_name(), "TR")) {
return BX_CPU(cpu)->tr.selector.value;
}
IF_SEG_REG_GET (CS);
IF_SEG_REG_GET (DS);
IF_SEG_REG_GET (SS);
IF_SEG_REG_GET (ES);
IF_SEG_REG_GET (FS);
IF_SEG_REG_GET (GS);
IF_LAZY_EFLAG_GET(OF);
IF_LAZY_EFLAG_GET(SF);
IF_LAZY_EFLAG_GET(ZF);
IF_LAZY_EFLAG_GET(AF);
IF_LAZY_EFLAG_GET(PF);
IF_LAZY_EFLAG_GET(CF);
IF_EFLAG_GET(ID);
IF_EFLAG_GET(VIP);
IF_EFLAG_GET(VIF);
IF_EFLAG_GET(AC);
IF_EFLAG_GET(VM);
IF_EFLAG_GET(RF);
IF_EFLAG_GET(NT);
IF_EFLAG_GET(IOPL);
IF_EFLAG_GET(DF);
IF_EFLAG_GET(IF);
IF_EFLAG_GET(TF);
}
return val;
}
#undef IF_SEG_REG_GET
#undef IF_SEG_REG_SET
#endif
void BX_CPU_C::initialize(BX_MEM_C *addrspace)
{
// BX_CPU_C constructor
BX_CPU_THIS_PTR set_INTR (0);
#if BX_SUPPORT_APIC
BX_CPU_THIS_PTR local_apic.set_id(BX_CPU_ID);
BX_CPU_THIS_PTR local_apic.init();
#endif
// in SMP mode, the prefix of the CPU will be changed to [CPUn] in
// bx_local_apic_c::set_id as soon as the apic ID is assigned.
/* hack for the following fields. Its easier to decode mod-rm bytes if
you can assume there's always a base & index register used. For
modes which don't really use them, point to an empty (zeroed) register.
*/
empty_register = 0;
// 16bit address mode base register, used for mod-rm decoding
_16bit_base_reg[0] = &gen_reg[BX_16BIT_REG_BX].word.rx;
_16bit_base_reg[1] = &gen_reg[BX_16BIT_REG_BX].word.rx;
_16bit_base_reg[2] = &gen_reg[BX_16BIT_REG_BP].word.rx;
_16bit_base_reg[3] = &gen_reg[BX_16BIT_REG_BP].word.rx;
_16bit_base_reg[4] = (Bit16u*) &empty_register;
_16bit_base_reg[5] = (Bit16u*) &empty_register;
_16bit_base_reg[6] = &gen_reg[BX_16BIT_REG_BP].word.rx;
_16bit_base_reg[7] = &gen_reg[BX_16BIT_REG_BX].word.rx;
// 16bit address mode index register, used for mod-rm decoding
_16bit_index_reg[0] = &gen_reg[BX_16BIT_REG_SI].word.rx;
_16bit_index_reg[1] = &gen_reg[BX_16BIT_REG_DI].word.rx;
_16bit_index_reg[2] = &gen_reg[BX_16BIT_REG_SI].word.rx;
_16bit_index_reg[3] = &gen_reg[BX_16BIT_REG_DI].word.rx;
_16bit_index_reg[4] = &gen_reg[BX_16BIT_REG_SI].word.rx;
_16bit_index_reg[5] = &gen_reg[BX_16BIT_REG_DI].word.rx;
_16bit_index_reg[6] = (Bit16u*) &empty_register;
_16bit_index_reg[7] = (Bit16u*) &empty_register;
// <TAG-INIT-CPU-START>
// for decoding instructions: access to seg reg's via index number
sreg_mod00_rm16[0] = BX_SEG_REG_DS;
sreg_mod00_rm16[1] = BX_SEG_REG_DS;
sreg_mod00_rm16[2] = BX_SEG_REG_SS;
sreg_mod00_rm16[3] = BX_SEG_REG_SS;
sreg_mod00_rm16[4] = BX_SEG_REG_DS;
sreg_mod00_rm16[5] = BX_SEG_REG_DS;
sreg_mod00_rm16[6] = BX_SEG_REG_DS;
sreg_mod00_rm16[7] = BX_SEG_REG_DS;
sreg_mod01or10_rm16[0] = BX_SEG_REG_DS;
sreg_mod01or10_rm16[1] = BX_SEG_REG_DS;
sreg_mod01or10_rm16[2] = BX_SEG_REG_SS;
sreg_mod01or10_rm16[3] = BX_SEG_REG_SS;
sreg_mod01or10_rm16[4] = BX_SEG_REG_DS;
sreg_mod01or10_rm16[5] = BX_SEG_REG_DS;
sreg_mod01or10_rm16[6] = BX_SEG_REG_SS;
sreg_mod01or10_rm16[7] = BX_SEG_REG_DS;
// the default segment to use for a one-byte modrm with
// mod==01b or mod==10b and rm == i
sreg_mod01or10_rm32[0] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[1] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[2] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[3] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[4] = BX_SEG_REG_NULL;
// this entry should never be accessed
// (escape to 2-byte)
sreg_mod01or10_rm32[5] = BX_SEG_REG_SS;
sreg_mod01or10_rm32[6] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[7] = BX_SEG_REG_DS;
#if BX_SUPPORT_X86_64
sreg_mod01or10_rm32[8] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[9] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[10] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[11] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[12] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[13] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[14] = BX_SEG_REG_DS;
sreg_mod01or10_rm32[15] = BX_SEG_REG_DS;
#endif
// the default segment to use for a two-byte modrm with
// mod==00b and base == i
sreg_mod0_base32[0] = BX_SEG_REG_DS;
sreg_mod0_base32[1] = BX_SEG_REG_DS;
sreg_mod0_base32[2] = BX_SEG_REG_DS;
sreg_mod0_base32[3] = BX_SEG_REG_DS;
sreg_mod0_base32[4] = BX_SEG_REG_SS;
sreg_mod0_base32[5] = BX_SEG_REG_DS;
sreg_mod0_base32[6] = BX_SEG_REG_DS;
sreg_mod0_base32[7] = BX_SEG_REG_DS;
#if BX_SUPPORT_X86_64
sreg_mod0_base32[8] = BX_SEG_REG_DS;
sreg_mod0_base32[9] = BX_SEG_REG_DS;
sreg_mod0_base32[10] = BX_SEG_REG_DS;
sreg_mod0_base32[11] = BX_SEG_REG_DS;
sreg_mod0_base32[12] = BX_SEG_REG_DS;
sreg_mod0_base32[13] = BX_SEG_REG_DS;
sreg_mod0_base32[14] = BX_SEG_REG_DS;
sreg_mod0_base32[15] = BX_SEG_REG_DS;
#endif
// the default segment to use for a two-byte modrm with
// mod==01b or mod==10b and base == i
sreg_mod1or2_base32[0] = BX_SEG_REG_DS;
sreg_mod1or2_base32[1] = BX_SEG_REG_DS;
sreg_mod1or2_base32[2] = BX_SEG_REG_DS;
sreg_mod1or2_base32[3] = BX_SEG_REG_DS;
sreg_mod1or2_base32[4] = BX_SEG_REG_SS;
sreg_mod1or2_base32[5] = BX_SEG_REG_SS;
sreg_mod1or2_base32[6] = BX_SEG_REG_DS;
sreg_mod1or2_base32[7] = BX_SEG_REG_DS;
#if BX_SUPPORT_X86_64
sreg_mod1or2_base32[8] = BX_SEG_REG_DS;
sreg_mod1or2_base32[9] = BX_SEG_REG_DS;
sreg_mod1or2_base32[10] = BX_SEG_REG_DS;
sreg_mod1or2_base32[11] = BX_SEG_REG_DS;
sreg_mod1or2_base32[12] = BX_SEG_REG_DS;
sreg_mod1or2_base32[13] = BX_SEG_REG_DS;
sreg_mod1or2_base32[14] = BX_SEG_REG_DS;
sreg_mod1or2_base32[15] = BX_SEG_REG_DS;
#endif
// <TAG-INIT-CPU-END>
mem = addrspace;
sprintf(name, "CPU %d", BX_CPU_ID);
#if BX_WITH_WX
static bx_bool counter = 0;
if (counter < BX_MAX_SMP_THREADS_SUPPORTED) {
// Register some of the CPUs variables as shadow parameters so that
// they can be visible in the config interface.
// (Experimental, obviously not a complete list)
bx_param_num_c *param;
char cpu_name[10], cpu_title[10];
const char *fmt16 = "%04X";
const char *fmt32 = "%08X";
Bit32u oldbase = bx_param_num_c::set_default_base(16);
const char *oldfmt = bx_param_num_c::set_default_format(fmt32);
sprintf(cpu_name, "%d", BX_CPU_ID);
sprintf(cpu_title, "CPU %d", BX_CPU_ID);
bx_list_c *list = new bx_list_c(SIM->get_param(BXPN_WX_CPU_STATE), strdup(cpu_name),
cpu_title, 60);
#define DEFPARAM_NORMAL(name,field) \
new bx_shadow_num_c(list, #name, #name, &(field))
DEFPARAM_NORMAL(EAX, EAX);
DEFPARAM_NORMAL(EBX, EBX);
DEFPARAM_NORMAL(ECX, ECX);
DEFPARAM_NORMAL(EDX, EDX);
DEFPARAM_NORMAL(ESP, ESP);
DEFPARAM_NORMAL(EBP, EBP);
DEFPARAM_NORMAL(ESI, ESI);
DEFPARAM_NORMAL(EDI, EDI);
DEFPARAM_NORMAL(EIP, EIP);
DEFPARAM_NORMAL(DR0, dr0);
DEFPARAM_NORMAL(DR1, dr1);
DEFPARAM_NORMAL(DR2, dr2);
DEFPARAM_NORMAL(DR3, dr3);
DEFPARAM_NORMAL(DR6, dr6);
DEFPARAM_NORMAL(DR7, dr7);
#if BX_SUPPORT_X86_64==0
#if BX_CPU_LEVEL >= 2
DEFPARAM_NORMAL(CR0, cr0.val32);
DEFPARAM_NORMAL(CR1, cr1);
DEFPARAM_NORMAL(CR2, cr2);
DEFPARAM_NORMAL(CR3, cr3);
#endif
#if BX_CPU_LEVEL >= 4
DEFPARAM_NORMAL(CR4, cr4.registerValue);
#endif
#endif // #if BX_SUPPORT_X86_64==0
// segment registers require a handler function because they have
// special get/set requirements.
#define DEFPARAM_SEG_REG(x) \
param = new bx_param_num_c(list, \
#x, #x, "", 0, 0xffff, 0); \
param->set_handler(cpu_param_handler); \
param->set_format(fmt16);
#define DEFPARAM_GLOBAL_SEG_REG(name,field) \
param = new bx_shadow_num_c(list, \
#name"_base", #name" base", \
& BX_CPU_THIS_PTR field.base); \
param = new bx_shadow_num_c(list, \
#name"_limit", #name" limit", \
& BX_CPU_THIS_PTR field.limit);
DEFPARAM_SEG_REG(CS);
DEFPARAM_SEG_REG(DS);
DEFPARAM_SEG_REG(SS);
DEFPARAM_SEG_REG(ES);
DEFPARAM_SEG_REG(FS);
DEFPARAM_SEG_REG(GS);
DEFPARAM_SEG_REG(LDTR);
DEFPARAM_SEG_REG(TR);
DEFPARAM_GLOBAL_SEG_REG(GDTR, gdtr);
DEFPARAM_GLOBAL_SEG_REG(IDTR, idtr);
#undef DEFPARAM_SEG_REG
#undef DEFPARAM_GLOBAL_SEG_REG
#if BX_SUPPORT_X86_64==0
param = new bx_shadow_num_c(list, "EFLAGS", "EFLAGS",
&BX_CPU_THIS_PTR eflags.val32);
#endif
// flags implemented in lazy_flags.cc must be done with a handler
// that calls their get function, to force them to be computed.
#define DEFPARAM_EFLAG(name) \
param = new bx_param_bool_c(list, \
#name, #name, "", get_##name()); \
param->set_handler(cpu_param_handler);
#define DEFPARAM_LAZY_EFLAG(name) \
param = new bx_param_bool_c(list, \
#name, #name, "", get_##name()); \
param->set_handler(cpu_param_handler);
#if BX_CPU_LEVEL >= 4
DEFPARAM_EFLAG(ID);
DEFPARAM_EFLAG(VIP);
DEFPARAM_EFLAG(VIF);
DEFPARAM_EFLAG(AC);
#endif
#if BX_CPU_LEVEL >= 3
DEFPARAM_EFLAG(VM);
DEFPARAM_EFLAG(RF);
#endif
#if BX_CPU_LEVEL >= 2
DEFPARAM_EFLAG(NT);
// IOPL is a special case because it is 2 bits wide.
param = new bx_shadow_num_c(
list,
"IOPL", "IOPL",
&eflags.val32, 10,
12, 13);
param->set_range(0, 3);
#if BX_SUPPORT_X86_64==0
param->set_format("%d");
#endif
#endif
DEFPARAM_LAZY_EFLAG(OF);
DEFPARAM_EFLAG(DF);
DEFPARAM_EFLAG(IF);
DEFPARAM_EFLAG(TF);
DEFPARAM_LAZY_EFLAG(SF);
DEFPARAM_LAZY_EFLAG(ZF);
DEFPARAM_LAZY_EFLAG(AF);
DEFPARAM_LAZY_EFLAG(PF);
DEFPARAM_LAZY_EFLAG(CF);
// restore defaults
bx_param_num_c::set_default_base(oldbase);
bx_param_num_c::set_default_format(oldfmt);
counter++;
}
#endif
}
BX_CPU_C::~BX_CPU_C(void)
{
BX_INSTR_SHUTDOWN(BX_CPU_ID);
BX_DEBUG(( "Exit."));
}
void BX_CPU_C::reset(unsigned source)
{
UNUSED(source); // either BX_RESET_HARDWARE or BX_RESET_SOFTWARE
#if BX_SUPPORT_X86_64
RAX = 0; // processor passed test :-)
RBX = 0;
RCX = 0;
RDX = get_cpu_version_information();
RBP = 0;
RSI = 0;
RDI = 0;
RSP = 0;
R8 = 0;
R9 = 0;
R10 = 0;
R11 = 0;
R12 = 0;
R13 = 0;
R14 = 0;
R15 = 0;
#else
// general registers
EAX = 0; // processor passed test :-)
EBX = 0;
ECX = 0;
EDX = get_cpu_version_information();
EBP = 0;
ESI = 0;
EDI = 0;
ESP = 0;
#endif
// all status flags at known values, use BX_CPU_THIS_PTR eflags structure
BX_CPU_THIS_PTR lf_flags_status = 0x000000;
// status and control flags register set
BX_CPU_THIS_PTR setEFlags(0x2); // Bit1 is always set
BX_CPU_THIS_PTR clear_IF ();
#if BX_CPU_LEVEL >= 3
BX_CPU_THIS_PTR clear_RF ();
BX_CPU_THIS_PTR clear_VM ();
#endif
#if BX_CPU_LEVEL >= 4
BX_CPU_THIS_PTR clear_AC ();
#endif
BX_CPU_THIS_PTR inhibit_mask = 0;
BX_CPU_THIS_PTR debug_trap = 0;
/* instruction pointer */
#if BX_CPU_LEVEL < 2
BX_CPU_THIS_PTR prev_eip = EIP = 0x00000000;
#else /* from 286 up */
BX_CPU_THIS_PTR prev_eip =
#if BX_SUPPORT_X86_64
RIP = 0x0000FFF0;
#else
EIP = 0x0000FFF0;
#endif
#endif
/* CS (Code Segment) and descriptor cache */
/* Note: on a real cpu, CS initially points to upper memory. After
* the 1st jump, the descriptor base is zero'd out. Since I'm just
* going to jump to my BIOS, I don't need to do this.
* For future reference:
* processor cs.selector cs.base cs.limit EIP
* 8086 FFFF FFFF0 FFFF 0000
* 286 F000 FF0000 FFFF FFF0
* 386+ F000 FFFF0000 FFFF FFF0
*/
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value = 0xF000;
#if BX_CPU_LEVEL >= 2
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.index = 0;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.ti = 0;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.rpl = 0;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.valid = 1;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.p = 1;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.dpl = 0;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.segment = 1; /* data/code segment */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.type = 11; /* executable/readable/access code segment */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.executable = 1; /* data/stack segment */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.c_ed = 0; /* normal expand up */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.r_w = 1; /* writeable */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.a = 1; /* accessed */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.base = 0xFFFF0000;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.limit = 0xFFFF;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.limit_scaled = 0xFFFF;
#endif
#if BX_CPU_LEVEL >= 3
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.g = 0; /* byte granular */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.d_b = 0; /* 16bit default size */
#if BX_SUPPORT_X86_64
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.l = 0; /* 16bit default size */
#endif
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.avl = 0;
#endif
#if BX_SUPPORT_ICACHE
BX_CPU_THIS_PTR updateFetchModeMask();
#endif
/* DS (Data Segment) and descriptor cache */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].selector.value = 0x0000;
#if BX_CPU_LEVEL >= 2
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].selector.index = 0;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].selector.ti = 0;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].selector.rpl = 0;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.valid = 1;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.p = 1;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.dpl = 0;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.segment = 1; /* data/code segment */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.type = 3; /* read/write/access */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.executable = 0; /* data/stack segment */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.c_ed = 0; /* normal expand up */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.r_w = 1; /* writeable */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.a = 1; /* accessed */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.base = 0x00000000;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.limit = 0xFFFF;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.limit_scaled = 0xFFFF;
#endif
#if BX_CPU_LEVEL >= 3
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.avl = 0;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.g = 0; /* byte granular */
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.d_b = 0; /* 16bit default size */
#if BX_SUPPORT_X86_64
BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].cache.u.segment.l = 0; /* 16bit default size */
#endif
#endif
// use DS segment as template for the others
BX_CPU_THIS_PTR sregs[BX_SEG_REG_SS] = BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS];
BX_CPU_THIS_PTR sregs[BX_SEG_REG_ES] = BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS];
#if BX_CPU_LEVEL >= 3
BX_CPU_THIS_PTR sregs[BX_SEG_REG_FS] = BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS];
BX_CPU_THIS_PTR sregs[BX_SEG_REG_GS] = BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS];
#endif
#if BX_CPU_LEVEL >= 2
/* GDTR (Global Descriptor Table Register) */
BX_CPU_THIS_PTR gdtr.base = 0x00000000;
BX_CPU_THIS_PTR gdtr.limit = 0xFFFF;
/* IDTR (Interrupt Descriptor Table Register) */
BX_CPU_THIS_PTR idtr.base = 0x00000000;
BX_CPU_THIS_PTR idtr.limit = 0xFFFF; /* always byte granular */
/* LDTR (Local Descriptor Table Register) */
BX_CPU_THIS_PTR ldtr.selector.value = 0x0000;
BX_CPU_THIS_PTR ldtr.selector.index = 0x0000;
BX_CPU_THIS_PTR ldtr.selector.ti = 0;
BX_CPU_THIS_PTR ldtr.selector.rpl = 0;
BX_CPU_THIS_PTR ldtr.cache.valid = 1; /* valid */
BX_CPU_THIS_PTR ldtr.cache.p = 1; /* present */
BX_CPU_THIS_PTR ldtr.cache.dpl = 0; /* field not used */
BX_CPU_THIS_PTR ldtr.cache.segment = 0; /* system segment */
BX_CPU_THIS_PTR ldtr.cache.type = 2; /* LDT descriptor */
BX_CPU_THIS_PTR ldtr.cache.u.ldt.base = 0x00000000;
BX_CPU_THIS_PTR ldtr.cache.u.ldt.limit = 0xFFFF;
/* TR (Task Register) */
BX_CPU_THIS_PTR tr.selector.value = 0x0000;
BX_CPU_THIS_PTR tr.selector.index = 0x0000; /* undefined */
BX_CPU_THIS_PTR tr.selector.ti = 0;
BX_CPU_THIS_PTR tr.selector.rpl = 0;
BX_CPU_THIS_PTR tr.cache.valid = 1; /* valid */
BX_CPU_THIS_PTR tr.cache.p = 1; /* present */
BX_CPU_THIS_PTR tr.cache.dpl = 0; /* field not used */
BX_CPU_THIS_PTR tr.cache.segment = 0; /* system segment */
BX_CPU_THIS_PTR tr.cache.type = 3; /* busy 16-bit TSS */
BX_CPU_THIS_PTR tr.cache.u.tss286.base = 0x00000000;
BX_CPU_THIS_PTR tr.cache.u.tss286.limit = 0xFFFF;
#endif
// DR0 - DR7 (Debug Registers)
#if BX_CPU_LEVEL >= 3
BX_CPU_THIS_PTR dr0 = 0; /* undefined */
BX_CPU_THIS_PTR dr1 = 0; /* undefined */
BX_CPU_THIS_PTR dr2 = 0; /* undefined */
BX_CPU_THIS_PTR dr3 = 0; /* undefined */
#endif
BX_CPU_THIS_PTR dr7 = 0x00000400;
#if BX_CPU_LEVEL == 3
BX_CPU_THIS_PTR dr6 = 0xFFFF1FF0;
#elif BX_CPU_LEVEL == 4
BX_CPU_THIS_PTR dr6 = 0xFFFF1FF0;
#elif BX_CPU_LEVEL == 5
BX_CPU_THIS_PTR dr6 = 0xFFFF0FF0;
#elif BX_CPU_LEVEL == 6
BX_CPU_THIS_PTR dr6 = 0xFFFF0FF0;
#else
# error "DR6: CPU > 6"
#endif
BX_CPU_THIS_PTR cpu_mode = BX_MODE_IA32_REAL;
BX_CPU_THIS_PTR smi_pending = 0;
BX_CPU_THIS_PTR nmi_pending = 0;
BX_CPU_THIS_PTR in_smm = 0;
BX_CPU_THIS_PTR nmi_disable = 0;
BX_CPU_THIS_PTR smbase = 0x30000;
#if BX_CPU_LEVEL >= 2
// MSW (Machine Status Word), so called on 286
// CR0 (Control Register 0), so called on 386+
BX_CPU_THIS_PTR cr0.ts = 0; // no task switch
BX_CPU_THIS_PTR cr0.em = 0; // emulate math coprocessor
BX_CPU_THIS_PTR cr0.mp = 0; // wait instructions not trapped
BX_CPU_THIS_PTR cr0.pe = 0; // real mode
BX_CPU_THIS_PTR cr0.val32 = 0;
#if BX_CPU_LEVEL >= 3
BX_CPU_THIS_PTR cr0.pg = 0; // paging disabled
// no change to cr0.val32
#endif
#if BX_CPU_LEVEL >= 4
BX_CPU_THIS_PTR cr0.cd = 0;
BX_CPU_THIS_PTR cr0.nw = 0;
BX_CPU_THIS_PTR cr0.am = 0; // disable alignment check
BX_CPU_THIS_PTR cr0.wp = 0; // disable write-protect
BX_CPU_THIS_PTR cr0.ne = 0; // np exceptions through int 13H, DOS compat
BX_CPU_THIS_PTR cr0.val32 |= 0x00000000;
#endif
// handle reserved bits
#if BX_CPU_LEVEL == 3
// reserved bits all set to 1 on 386
BX_CPU_THIS_PTR cr0.val32 |= 0x7ffffff0;
#elif BX_CPU_LEVEL >= 4
// bit 4 is hardwired to 1 on all x86
BX_CPU_THIS_PTR cr0.val32 |= 0x00000010;
#endif
#endif // CPU >= 2
// CR0 paging might be modified
TLB_flush(1);
#if BX_CPU_LEVEL >= 3
BX_CPU_THIS_PTR cr2 = 0;
BX_CPU_THIS_PTR cr3 = 0;
BX_CPU_THIS_PTR cr3_masked = 0;
#endif
#if BX_CPU_LEVEL >= 4
BX_CPU_THIS_PTR cr4.setRegister(0);
#endif
/* initialise MSR registers to defaults */
#if BX_CPU_LEVEL >= 5
#if BX_SUPPORT_APIC
/* APIC Address, APIC enabled and BSP is default, we'll fill in the rest later */
BX_CPU_THIS_PTR msr.apicbase = BX_LAPIC_BASE_ADDR;
BX_CPU_THIS_PTR local_apic.init();
BX_CPU_THIS_PTR msr.apicbase |= 0x900;
#endif
#if BX_SUPPORT_X86_64
BX_CPU_THIS_PTR msr.lme = BX_CPU_THIS_PTR msr.lma = 0;
#endif
BX_CPU_THIS_PTR set_TSC(0);
#endif
BX_CPU_THIS_PTR EXT = 0;
#if BX_SUPPORT_PAGING
#if BX_USE_TLB
TLB_init();
#endif // BX_USE_TLB
#endif // BX_SUPPORT_PAGING
// invalidate the prefetch queue
BX_CPU_THIS_PTR eipPageBias = 0;
BX_CPU_THIS_PTR eipPageWindowSize = 0;
BX_CPU_THIS_PTR eipFetchPtr = NULL;
#if BX_DEBUGGER
#if BX_MAGIC_BREAKPOINT
BX_CPU_THIS_PTR magic_break = 0;
#endif
BX_CPU_THIS_PTR stop_reason = STOP_NO_REASON;
BX_CPU_THIS_PTR trace_reg = 0;
BX_CPU_THIS_PTR dbg_cpu_mode = BX_CPU_THIS_PTR cpu_mode;
#endif
BX_CPU_THIS_PTR trace = 0;
// Reset the Floating Point Unit
#if BX_SUPPORT_FPU
BX_CPU_THIS_PTR the_i387.reset(); // unchanged on #INIT
#endif
// Reset XMM state
#if BX_SUPPORT_SSE >= 1 // unchanged on #INIT
for(unsigned index=0; index < BX_XMM_REGISTERS; index++)
{
BX_CPU_THIS_PTR xmm[index].xmm64u(0) = 0;
BX_CPU_THIS_PTR xmm[index].xmm64u(1) = 0;
}
BX_CPU_THIS_PTR mxcsr.mxcsr = MXCSR_RESET;
#endif
#if BX_SUPPORT_SMP
// notice if I'm the bootstrap processor. If not, do the equivalent of
// a HALT instruction.
int apic_id = local_apic.get_id();
if (BX_BOOTSTRAP_PROCESSOR == apic_id) {
// boot normally
BX_CPU_THIS_PTR msr.apicbase |= 0x0100; /* set bit 8 BSP */
BX_INFO(("CPU[%d] is the bootstrap processor", apic_id));
} else {
// it's an application processor, halt until IPI is heard.
BX_CPU_THIS_PTR msr.apicbase &= ~0x0100; /* clear bit 8 BSP */
BX_INFO(("CPU[%d] is an application processor. Halting until IPI.", apic_id));
debug_trap |= BX_DEBUG_TRAP_HALT_STATE;
async_event = 1;
}
#endif
BX_INSTR_RESET(BX_CPU_ID);
}
void BX_CPU_C::sanity_checks(void)
{
Bit8u al, cl, dl, bl, ah, ch, dh, bh;
Bit16u ax, cx, dx, bx, sp, bp, si, di;
Bit32u eax, ecx, edx, ebx, esp, ebp, esi, edi;
EAX = 0xFFEEDDCC;
ECX = 0xBBAA9988;
EDX = 0x77665544;
EBX = 0x332211FF;
ESP = 0xEEDDCCBB;
EBP = 0xAA998877;
ESI = 0x66554433;
EDI = 0x2211FFEE;
al = AL;
cl = CL;
dl = DL;
bl = BL;
ah = AH;
ch = CH;
dh = DH;
bh = BH;
if ( al != (EAX & 0xFF) ||
cl != (ECX & 0xFF) ||
dl != (EDX & 0xFF) ||
bl != (EBX & 0xFF) ||
ah != ((EAX >> 8) & 0xFF) ||
ch != ((ECX >> 8) & 0xFF) ||
dh != ((EDX >> 8) & 0xFF) ||
bh != ((EBX >> 8) & 0xFF) )
{
BX_PANIC(("problems using BX_READ_8BIT_REGx()!"));
}
ax = AX;
cx = CX;
dx = DX;
bx = BX;
sp = SP;
bp = BP;
si = SI;
di = DI;
if ( ax != (EAX & 0xFFFF) ||
cx != (ECX & 0xFFFF) ||
dx != (EDX & 0xFFFF) ||
bx != (EBX & 0xFFFF) ||
sp != (ESP & 0xFFFF) ||
bp != (EBP & 0xFFFF) ||
si != (ESI & 0xFFFF) ||
di != (EDI & 0xFFFF) )
{
BX_PANIC(("problems using BX_READ_16BIT_REG()!"));
}
eax = EAX;
ecx = ECX;
edx = EDX;
ebx = EBX;
esp = ESP;
ebp = EBP;
esi = ESI;
edi = EDI;
if (sizeof(Bit8u) != 1 || sizeof(Bit8s) != 1)
BX_PANIC(("data type Bit8u or Bit8s is not of length 1 byte!"));
if (sizeof(Bit16u) != 2 || sizeof(Bit16s) != 2)
BX_PANIC(("data type Bit16u or Bit16s is not of length 2 bytes!"));
if (sizeof(Bit32u) != 4 || sizeof(Bit32s) != 4)
BX_PANIC(("data type Bit32u or Bit32s is not of length 4 bytes!"));
if (sizeof(Bit64u) != 8 || sizeof(Bit64s) != 8)
BX_PANIC(("data type Bit64u or Bit64u is not of length 8 bytes!"));
BX_DEBUG(("#(%u)all sanity checks passed!", BX_CPU_ID));
}
void BX_CPU_C::assert_checks(void)
{
// check CPU mode consistency
#if BX_SUPPORT_X86_64
if (BX_CPU_THIS_PTR msr.lma) {
if (! BX_CPU_THIS_PTR cr0.pe) {
BX_PANIC(("assert_checks: EFER.LMA is set when CR0.PE=0 !"));
}
if (BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.l) {
if (BX_CPU_THIS_PTR cpu_mode != BX_MODE_LONG_64)
BX_PANIC(("assert_checks: unconsistent cpu_mode BX_MODE_LONG_64 !"));
}
else {
if (BX_CPU_THIS_PTR cpu_mode != BX_MODE_LONG_COMPAT)
BX_PANIC(("assert_checks: unconsistent cpu_mode BX_MODE_LONG_COMPAT !"));
}
}
else
#endif
{
if (BX_CPU_THIS_PTR cr0.pe) {
if (BX_CPU_THIS_PTR get_VM()) {
if (BX_CPU_THIS_PTR cpu_mode != BX_MODE_IA32_V8086)
BX_PANIC(("assert_checks: unconsistent cpu_mode BX_MODE_IA32_V8086 !"));
}
else {
if (BX_CPU_THIS_PTR cpu_mode != BX_MODE_IA32_PROTECTED)
BX_PANIC(("assert_checks: unconsistent cpu_mode BX_MODE_IA32_PROTECTED !"));
}
}
else {
if (BX_CPU_THIS_PTR cpu_mode != BX_MODE_IA32_REAL)
BX_PANIC(("assert_checks: unconsistent cpu_mode BX_MODE_IA32_REAL !"));
}
}
// VM should be OFF in long mode
#if BX_SUPPORT_X86_64
if (IsLongMode()) {
if (BX_CPU_THIS_PTR get_VM()) BX_PANIC(("assert_checks: VM is set in long mode !"));
}
#endif
}
void BX_CPU_C::set_INTR(bx_bool value)
{
BX_CPU_THIS_PTR INTR = value;
BX_CPU_THIS_PTR async_event = 1;
}
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