Bit64s BX_CPU_C::param_restore(bx_param_c *param, Bit64s val)
{
#else
UNUSED(devptr);
#endif // !BX_USE_CPU_SMF
const char *pname, *segname;
bx_segment_reg_t *segment = NULL;
pname = param->get_name();
if (!strcmp(pname, "cpu_version")) {
if (val != get_cpu_version_information()) {
BX_PANIC(("save/restore: CPU version mismatch"));
}
} else if (!strcmp(pname, "cpuid_std")) {
if (val != get_std_cpuid_features()) {
BX_PANIC(("save/restore: CPUID mismatch"));
}
} else if (!strcmp(pname, "cpuid_ext")) {
if (val != get_extended_cpuid_features()) {
BX_PANIC(("save/restore: CPUID mismatch"));
}
} else if (!strcmp(pname, "EFLAGS")) {
BX_CPU_THIS_PTR setEFlags((Bit32u)val);
#if BX_SUPPORT_X86_64
} else if (!strcmp(pname, "EFER")) {
BX_CPU_THIS_PTR efer.sce = (val >> 0) & 1;
BX_CPU_THIS_PTR efer.lme = (val >> 8) & 1;
BX_CPU_THIS_PTR efer.lma = (val >> 10) & 1;
BX_CPU_THIS_PTR efer.nxe = (val >> 11) & 1;
BX_CPU_THIS_PTR efer.ffxsr = (val >> 14) & 1;
#endif
} else if (!strcmp(pname, "ar_byte") || !strcmp(pname, "selector")) {
void BX_CPU_C::enter_system_management_mode(void)
{
invalidate_prefetch_q();
BX_INFO(("Enter to System Management Mode"));
// debug(BX_CPU_THIS_PTR prev_rip);
BX_CPU_THIS_PTR in_smm = 1;
Bit32u saved_state[SMM_SAVE_STATE_MAP_SIZE], n;
// reset reserved bits
for(n=0;n<SMM_SAVE_STATE_MAP_SIZE;n++) saved_state[n] = 0;
// prepare CPU state to be saved in the SMRAM
BX_CPU_THIS_PTR smram_save_state(saved_state);
bx_phy_address base = BX_CPU_THIS_PTR smbase + 0x10000;
// could be optimized with reading of only non-reserved bytes
for(n=0;n<SMM_SAVE_STATE_MAP_SIZE;n++) {
base -= 4;
BX_MEM(0)->writePhysicalPage(BX_CPU_THIS, base, 4, &saved_state[n]);
BX_DBG_PHY_MEMORY_ACCESS(BX_CPU_ID, base, 4, BX_WRITE, (Bit8u*)(&saved_state[n]));
}
BX_CPU_THIS_PTR setEFlags(0x2); // Bit1 is always set
BX_CPU_THIS_PTR prev_rip = RIP = 0x00008000;
BX_CPU_THIS_PTR dr7 = 0x00000400;
// CR0 - PE, EM, TS, and PG flags set to 0; others unmodified
BX_CPU_THIS_PTR cr0.set_PE(0); // real mode (bit 0)
BX_CPU_THIS_PTR cr0.set_EM(0); // emulate math coprocessor (bit 2)
BX_CPU_THIS_PTR cr0.set_TS(0); // no task switch (bit 3)
BX_CPU_THIS_PTR cr0.set_PG(0); // paging disabled (bit 31)
// paging mode was changed - flush TLB
TLB_flush(1); // 1 = Flush Global entries also
#if BX_CPU_LEVEL >= 4
BX_CPU_THIS_PTR cr4.setRegister(0);
#endif
#if BX_SUPPORT_X86_64
BX_CPU_THIS_PTR efer.setRegister(0);
#endif
parse_selector(BX_CPU_THIS_PTR smbase >> 4,
&BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector);
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 = BX_DATA_READ_WRITE_ACCESSED;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.base = BX_CPU_THIS_PTR smbase;
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 = 0xffffffff;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.avl = 0;
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].cache.u.segment.g = 1; /* page 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
#if BX_SUPPORT_ICACHE
BX_CPU_THIS_PTR updateFetchModeMask();
#endif
handleCpuModeChange();
#if BX_CPU_LEVEL >= 4 && BX_SUPPORT_ALIGNMENT_CHECK
handleAlignmentCheck();
#endif
/* DS (Data Segment) and descriptor cache */
parse_selector(0x0000,
&BX_CPU_THIS_PTR sregs[BX_SEG_REG_DS].selector);
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 = BX_DATA_READ_WRITE_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 = 0xffffffff;
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 = 1; /* 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
// 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];
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];
}
