data_create_unknown3.v

Require Import SpecDeps.
Require Import RData.
Require Import EventReplay.
Require Import MoverTypes.
Require Import Constants.
Require Import CommonLib.

Local Open Scope Z_scope.

Section Spec.

  Definition data_create_unknown3_spec (g_rd: Pointer) (data_addr: Z64) (map_addr: Z64) (g_data': Pointer) (adt: RData) : option (RData * Z64) :=
    match map_addr, data_addr with
    | VZ64 map_addr, VZ64 data_addr =>
      rely is_int64 map_addr; rely is_int64 data_addr;
      let idx0 := __addr_to_idx map_addr 0 in
      let idx1 := __addr_to_idx map_addr 1 in
      let idx2 := __addr_to_idx map_addr 2 in
      let idx3 := __addr_to_idx map_addr 3 in
      let ret_idx := idx3 in
      rely (peq (base g_rd) ginfo_loc);
      rely (peq (base g_data') ginfo_loc);
      rely prop_dec ((buffer (priv adt)) @ SLOT_RD = None);
      rely prop_dec ((buffer (priv adt)) @ SLOT_TABLE = None);
      rely prop_dec ((buffer (priv adt)) @ SLOT_DELEGATED = None);
      let rd_gidx := (offset g_rd) in
      let data_gidx := offset g_data' in
      let grd := (gs (share adt)) @ rd_gidx in
      rely prop_dec (__addr_to_gidx data_addr = data_gidx);
      rely (g_tag (ginfo grd) =? GRANULE_STATE_RD);
      rely prop_dec (glock grd = Some CPU_ID);
      let root_gidx := (g_rtt (gnorm grd)) in
      rely is_gidx rd_gidx; rely is_gidx root_gidx; rely is_gidx data_gidx;
      when adt == query_oracle adt;
      let adt := adt {log: EVT CPU_ID (RTT_WALK root_gidx map_addr 3) :: log adt} in
      (* hold root lock *)
      let groot := (gs (share adt)) @ root_gidx in
      rely (tbl_level (gaux groot) =? 0);
      rely prop_dec (glock groot = None);
      rely (g_tag (ginfo groot) =? GRANULE_STATE_TABLE);
      rely (gtype groot =? GRANULE_STATE_TABLE);
      (* walk deeper root *)
      let entry0 := (g_data (gnorm groot)) @ idx0 in
      rely is_int64 entry0;
      let phys0 := __entry_to_phys entry0 3 in
      let lv1_gidx := __addr_to_gidx phys0 in
      if (__entry_is_table entry0) && (GRANULE_ALIGNED phys0) && (is_gidx lv1_gidx) then
        (* level 1 valid, hold level 1 lock *)
        let glv1 := (gs (share adt)) @ lv1_gidx in
        rely prop_dec (glock glv1 = None);
        rely (tbl_level (gaux glv1) =? 1);
        (* walk deeper level 1 *)
        rely (g_tag (ginfo glv1) =? GRANULE_STATE_TABLE);
        rely (gtype glv1 =? GRANULE_STATE_TABLE);
        let entry1 := (g_data (gnorm glv1)) @ idx1 in
        rely is_int64 entry1;
        let phys1 := __entry_to_phys entry1 3 in
        let lv2_gidx := __addr_to_gidx phys1 in
        if (__entry_is_table entry1) && (GRANULE_ALIGNED phys1) && (is_gidx lv2_gidx) then
          (* level 2 valid, hold level 2 lock *)
          let glv2 := (gs (share adt)) @ lv2_gidx in
          rely (tbl_level (gaux glv2) =? 2);
          rely prop_dec (glock glv2 = None);
          (* walk deeper level 2 *)
          rely (g_tag (ginfo glv2) =? GRANULE_STATE_TABLE);
          rely (gtype glv2 =? GRANULE_STATE_TABLE);
          let entry2 := (g_data (gnorm glv2)) @ idx2 in
          rely is_int64 entry2;
          let phys2 := __entry_to_phys entry2 3 in
          let lv3_gidx := __addr_to_gidx phys2 in
          if (__entry_is_table entry2) && (GRANULE_ALIGNED phys2) && (is_gidx lv3_gidx) then
            (* level 2 valid, hold level 2 lock *)
            let glv3 := (gs (share adt)) @ lv3_gidx in
            rely prop_dec (glock glv3 = None);
            rely (tbl_level (gaux glv3) =? 3);
            let adt :=  adt {priv: (priv adt) {wi_llt: lv3_gidx} {wi_index: idx3}} in
            (* create data *)
            let llt_gidx := lv3_gidx in
            let idx := idx3 in
            let gn_llt := (gs (share adt)) @ llt_gidx in
            let gn_data := (gs (share adt)) @ data_gidx in
            rely (g_tag (ginfo gn_llt) =? GRANULE_STATE_TABLE);
            rely (gtype gn_llt =? GRANULE_STATE_TABLE);
            rely (gtype gn_data =? GRANULE_STATE_DELEGATED);
            rely prop_dec (glock gn_data = Some CPU_ID);
            rely (tbl_level (gaux gn_data) =? 0);
            let llt_pte := (g_data (gnorm gn_llt)) @ idx in
            rely is_int64 llt_pte;
            if PTE_TO_IPA_STATE llt_pte =? IPA_STATE_VACANT then
              let gdata' := gn_data {gaux: mkAuxillaryVars 0 0 map_addr} in
              let pte_val := Z.lor (IPA_STATE_TO_PTE IPA_STATE_ABSENT) data_addr in
              let llt' := (g_data (gnorm gn_llt)) # idx == pte_val in
              let gllt' := gn_llt {ginfo : (ginfo gn_llt) {g_refcount : g_refcount (ginfo gn_llt) + 1}}
                                  {gnorm: (gnorm gn_llt) {g_data: llt'}} in
              Some (adt {log: EVT CPU_ID (REL llt_gidx gllt' {glock: Some CPU_ID}) :: log adt}
                        {share : (share adt) {gs : ((gs (share adt)) # data_gidx == gdata') # llt_gidx == gllt'}},
                    VZ64 0)
            else Some (adt {log: EVT CPU_ID (REL llt_gidx gn_llt {glock: Some CPU_ID}) :: log adt}, VZ64 1)
          else
            (* level 3 invalid *)
            Some (adt {priv: (priv adt) {wi_llt: 0} {wi_index: ret_idx}}, VZ64 1)
        else
          (* level 2 invalid *)
          Some (adt {priv: (priv adt) {wi_llt: 0} {wi_index: ret_idx}}, VZ64 1)
      else
        (* level 1 invalid *)
        Some (adt {priv: (priv adt) {wi_llt: 0} {wi_index: ret_idx}}, VZ64 1)
    end.

End Spec.