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/*

 *  x86 SMM helpers

 *

 *  Copyright (c) 2003 Fabrice Bellard

 *

 * 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, see <http://www.gnu.org/licenses/>.

 */

#include "cpu.h"

#include "helper.h"

/* SMM support */

#if defined(CONFIG_USER_ONLY)

void do_smm_enter(CPUX86State *env)

{

}

void helper_rsm(CPUX86State *env)

{

}

#else

#ifdef TARGET_X86_64

#define SMM_REVISION_ID 0x00020064

#else

#define SMM_REVISION_ID 0x00020000

#endif

void do_smm_enter(CPUX86State *env)

{

    target_ulong sm_state;

    SegmentCache *dt;

    int i, offset;

    qemu_log_mask(CPU_LOG_INT, "SMM: enter\n");

    log_cpu_state_mask(CPU_LOG_INT, env, X86_DUMP_CCOP);

    env->hflags |= HF_SMM_MASK;

    cpu_smm_update(env);

    sm_state = env->smbase + 0x8000;

#ifdef TARGET_X86_64

    for (i = 0; i < 6; i++) {

        dt = &env->segs[i];

        offset = 0x7e00 + i * 16;

        stw_phys(sm_state + offset, dt->selector);

        stw_phys(sm_state + offset + 2, (dt->flags >> 8) & 0xf0ff);

        stl_phys(sm_state + offset + 4, dt->limit);

        stq_phys(sm_state + offset + 8, dt->base);

    }

    stq_phys(sm_state + 0x7e68, env->gdt.base);

    stl_phys(sm_state + 0x7e64, env->gdt.limit);

    stw_phys(sm_state + 0x7e70, env->ldt.selector);

    stq_phys(sm_state + 0x7e78, env->ldt.base);

    stl_phys(sm_state + 0x7e74, env->ldt.limit);

    stw_phys(sm_state + 0x7e72, (env->ldt.flags >> 8) & 0xf0ff);

    stq_phys(sm_state + 0x7e88, env->idt.base);

    stl_phys(sm_state + 0x7e84, env->idt.limit);

    stw_phys(sm_state + 0x7e90, env->tr.selector);

    stq_phys(sm_state + 0x7e98, env->tr.base);

    stl_phys(sm_state + 0x7e94, env->tr.limit);

    stw_phys(sm_state + 0x7e92, (env->tr.flags >> 8) & 0xf0ff);

    stq_phys(sm_state + 0x7ed0, env->efer);

    stq_phys(sm_state + 0x7ff8, EAX);

    stq_phys(sm_state + 0x7ff0, ECX);

    stq_phys(sm_state + 0x7fe8, EDX);

    stq_phys(sm_state + 0x7fe0, EBX);

    stq_phys(sm_state + 0x7fd8, ESP);

    stq_phys(sm_state + 0x7fd0, EBP);

    stq_phys(sm_state + 0x7fc8, ESI);

    stq_phys(sm_state + 0x7fc0, EDI);

    for (i = 8; i < 16; i++) {

        stq_phys(sm_state + 0x7ff8 - i * 8, env->regs[i]);

    }

    stq_phys(sm_state + 0x7f78, env->eip);

    stl_phys(sm_state + 0x7f70, cpu_compute_eflags(env));

    stl_phys(sm_state + 0x7f68, env->dr[6]);

    stl_phys(sm_state + 0x7f60, env->dr[7]);

    stl_phys(sm_state + 0x7f48, env->cr[4]);

    stl_phys(sm_state + 0x7f50, env->cr[3]);

    stl_phys(sm_state + 0x7f58, env->cr[0]);

    stl_phys(sm_state + 0x7efc, SMM_REVISION_ID);

    stl_phys(sm_state + 0x7f00, env->smbase);

#else

    stl_phys(sm_state + 0x7ffc, env->cr[0]);

    stl_phys(sm_state + 0x7ff8, env->cr[3]);

    stl_phys(sm_state + 0x7ff4, cpu_compute_eflags(env));

    stl_phys(sm_state + 0x7ff0, env->eip);

    stl_phys(sm_state + 0x7fec, EDI);

    stl_phys(sm_state + 0x7fe8, ESI);

    stl_phys(sm_state + 0x7fe4, EBP);

    stl_phys(sm_state + 0x7fe0, ESP);

    stl_phys(sm_state + 0x7fdc, EBX);

    stl_phys(sm_state + 0x7fd8, EDX);

    stl_phys(sm_state + 0x7fd4, ECX);

    stl_phys(sm_state + 0x7fd0, EAX);

    stl_phys(sm_state + 0x7fcc, env->dr[6]);

    stl_phys(sm_state + 0x7fc8, env->dr[7]);

    stl_phys(sm_state + 0x7fc4, env->tr.selector);

    stl_phys(sm_state + 0x7f64, env->tr.base);

    stl_phys(sm_state + 0x7f60, env->tr.limit);

    stl_phys(sm_state + 0x7f5c, (env->tr.flags >> 8) & 0xf0ff);

    stl_phys(sm_state + 0x7fc0, env->ldt.selector);

    stl_phys(sm_state + 0x7f80, env->ldt.base);

    stl_phys(sm_state + 0x7f7c, env->ldt.limit);

    stl_phys(sm_state + 0x7f78, (env->ldt.flags >> 8) & 0xf0ff);

    stl_phys(sm_state + 0x7f74, env->gdt.base);

    stl_phys(sm_state + 0x7f70, env->gdt.limit);

    stl_phys(sm_state + 0x7f58, env->idt.base);

    stl_phys(sm_state + 0x7f54, env->idt.limit);

    for (i = 0; i < 6; i++) {

        dt = &env->segs[i];

        if (i < 3) {

            offset = 0x7f84 + i * 12;

        } else {

            offset = 0x7f2c + (i - 3) * 12;

        }

        stl_phys(sm_state + 0x7fa8 + i * 4, dt->selector);

        stl_phys(sm_state + offset + 8, dt->base);

        stl_phys(sm_state + offset + 4, dt->limit);

        stl_phys(sm_state + offset, (dt->flags >> 8) & 0xf0ff);

    }

    stl_phys(sm_state + 0x7f14, env->cr[4]);

    stl_phys(sm_state + 0x7efc, SMM_REVISION_ID);

    stl_phys(sm_state + 0x7ef8, env->smbase);

#endif

    /* init SMM cpu state */

#ifdef TARGET_X86_64

    cpu_load_efer(env, 0);

#endif

    cpu_load_eflags(env, 0, ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C |

                              DF_MASK));

    env->eip = 0x00008000;

    cpu_x86_load_seg_cache(env, R_CS, (env->smbase >> 4) & 0xffff, env->smbase,

                           0xffffffff, 0);

    cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0xffffffff, 0);

    cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0xffffffff, 0);

    cpu_x86_load_seg_cache(env, R_SS, 0, 0, 0xffffffff, 0);

    cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0xffffffff, 0);

    cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0xffffffff, 0);

    cpu_x86_update_cr0(env,

                       env->cr[0] & ~(CR0_PE_MASK | CR0_EM_MASK | CR0_TS_MASK |

                                      CR0_PG_MASK));

    cpu_x86_update_cr4(env, 0);

    env->dr[7] = 0x00000400;

    CC_OP = CC_OP_EFLAGS;

}

void helper_rsm(CPUX86State *env)

{

    target_ulong sm_state;

    int i, offset;

    uint32_t val;

    sm_state = env->smbase + 0x8000;

#ifdef TARGET_X86_64

    cpu_load_efer(env, ldq_phys(sm_state + 0x7ed0));

    for (i = 0; i < 6; i++) {

        offset = 0x7e00 + i * 16;

        cpu_x86_load_seg_cache(env, i,

                               lduw_phys(sm_state + offset),

                               ldq_phys(sm_state + offset + 8),

                               ldl_phys(sm_state + offset + 4),

                               (lduw_phys(sm_state + offset + 2) &

                                0xf0ff) << 8);

    }

    env->gdt.base = ldq_phys(sm_state + 0x7e68);

    env->gdt.limit = ldl_phys(sm_state + 0x7e64);

    env->ldt.selector = lduw_phys(sm_state + 0x7e70);

    env->ldt.base = ldq_phys(sm_state + 0x7e78);

    env->ldt.limit = ldl_phys(sm_state + 0x7e74);

    env->ldt.flags = (lduw_phys(sm_state + 0x7e72) & 0xf0ff) << 8;

    env->idt.base = ldq_phys(sm_state + 0x7e88);

    env->idt.limit = ldl_phys(sm_state + 0x7e84);

    env->tr.selector = lduw_phys(sm_state + 0x7e90);

    env->tr.base = ldq_phys(sm_state + 0x7e98);

    env->tr.limit = ldl_phys(sm_state + 0x7e94);

    env->tr.flags = (lduw_phys(sm_state + 0x7e92) & 0xf0ff) << 8;

    EAX = ldq_phys(sm_state + 0x7ff8);

    ECX = ldq_phys(sm_state + 0x7ff0);

    EDX = ldq_phys(sm_state + 0x7fe8);

    EBX = ldq_phys(sm_state + 0x7fe0);

    ESP = ldq_phys(sm_state + 0x7fd8);

    EBP = ldq_phys(sm_state + 0x7fd0);

    ESI = ldq_phys(sm_state + 0x7fc8);

    EDI = ldq_phys(sm_state + 0x7fc0);

    for (i = 8; i < 16; i++) {

        env->regs[i] = ldq_phys(sm_state + 0x7ff8 - i * 8);

    }

    env->eip = ldq_phys(sm_state + 0x7f78);

    cpu_load_eflags(env, ldl_phys(sm_state + 0x7f70),

                    ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));

    env->dr[6] = ldl_phys(sm_state + 0x7f68);

    env->dr[7] = ldl_phys(sm_state + 0x7f60);

    cpu_x86_update_cr4(env, ldl_phys(sm_state + 0x7f48));

    cpu_x86_update_cr3(env, ldl_phys(sm_state + 0x7f50));

    cpu_x86_update_cr0(env, ldl_phys(sm_state + 0x7f58));

    val = ldl_phys(sm_state + 0x7efc); /* revision ID */

    if (val & 0x20000) {

        env->smbase = ldl_phys(sm_state + 0x7f00) & ~0x7fff;

    }

#else

    cpu_x86_update_cr0(env, ldl_phys(sm_state + 0x7ffc));

    cpu_x86_update_cr3(env, ldl_phys(sm_state + 0x7ff8));

    cpu_load_eflags(env, ldl_phys(sm_state + 0x7ff4),

                    ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));

    env->eip = ldl_phys(sm_state + 0x7ff0);

    EDI = ldl_phys(sm_state + 0x7fec);

    ESI = ldl_phys(sm_state + 0x7fe8);

    EBP = ldl_phys(sm_state + 0x7fe4);

    ESP = ldl_phys(sm_state + 0x7fe0);

    EBX = ldl_phys(sm_state + 0x7fdc);

    EDX = ldl_phys(sm_state + 0x7fd8);

    ECX = ldl_phys(sm_state + 0x7fd4);

    EAX = ldl_phys(sm_state + 0x7fd0);

    env->dr[6] = ldl_phys(sm_state + 0x7fcc);

    env->dr[7] = ldl_phys(sm_state + 0x7fc8);

    env->tr.selector = ldl_phys(sm_state + 0x7fc4) & 0xffff;

    env->tr.base = ldl_phys(sm_state + 0x7f64);

    env->tr.limit = ldl_phys(sm_state + 0x7f60);

    env->tr.flags = (ldl_phys(sm_state + 0x7f5c) & 0xf0ff) << 8;

    env->ldt.selector = ldl_phys(sm_state + 0x7fc0) & 0xffff;

    env->ldt.base = ldl_phys(sm_state + 0x7f80);

    env->ldt.limit = ldl_phys(sm_state + 0x7f7c);

    env->ldt.flags = (ldl_phys(sm_state + 0x7f78) & 0xf0ff) << 8;

    env->gdt.base = ldl_phys(sm_state + 0x7f74);

    env->gdt.limit = ldl_phys(sm_state + 0x7f70);

    env->idt.base = ldl_phys(sm_state + 0x7f58);

    env->idt.limit = ldl_phys(sm_state + 0x7f54);

    for (i = 0; i < 6; i++) {

        if (i < 3) {

            offset = 0x7f84 + i * 12;

        } else {

            offset = 0x7f2c + (i - 3) * 12;

        }

        cpu_x86_load_seg_cache(env, i,

                               ldl_phys(sm_state + 0x7fa8 + i * 4) & 0xffff,

                               ldl_phys(sm_state + offset + 8),

                               ldl_phys(sm_state + offset + 4),

                               (ldl_phys(sm_state + offset) & 0xf0ff) << 8);

    }

    cpu_x86_update_cr4(env, ldl_phys(sm_state + 0x7f14));

    val = ldl_phys(sm_state + 0x7efc); /* revision ID */

    if (val & 0x20000) {

        env->smbase = ldl_phys(sm_state + 0x7ef8) & ~0x7fff;

    }

#endif

    CC_OP = CC_OP_EFLAGS;

    env->hflags &= ~HF_SMM_MASK;

    cpu_smm_update(env);

    qemu_log_mask(CPU_LOG_INT, "SMM: after RSM\n");

    log_cpu_state_mask(CPU_LOG_INT, env, X86_DUMP_CCOP);

}

#endif /* !CONFIG_USER_ONLY */