/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *   Mupen64plus - interpreter_tlb.def                                     *
 *   Mupen64Plus homepage: http://code.google.com/p/mupen64plus/           *
 *   Copyright (C) 2002 Hacktarux                                          *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.          *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include <zlib.h> // For adler32()

DECLARE_INSTRUCTION(TLBR)
{
   int index;
   index = state->g_cp0_regs[CP0_INDEX_REG] & 0x1F;
   state->g_cp0_regs[CP0_PAGEMASK_REG] = state->tlb_e[index].mask << 13;
   state->g_cp0_regs[CP0_ENTRYHI_REG] = ((state->tlb_e[index].vpn2 << 13) | state->tlb_e[index].asid);
   state->g_cp0_regs[CP0_ENTRYLO0_REG] = (state->tlb_e[index].pfn_even << 6) | (state->tlb_e[index].c_even << 3)
     | (state->tlb_e[index].d_even << 2) | (state->tlb_e[index].v_even << 1)
       | state->tlb_e[index].g;
   state->g_cp0_regs[CP0_ENTRYLO1_REG] = (state->tlb_e[index].pfn_odd << 6) | (state->tlb_e[index].c_odd << 3)
     | (state->tlb_e[index].d_odd << 2) | (state->tlb_e[index].v_odd << 1)
       | state->tlb_e[index].g;
   ADD_TO_PC(1);
}

static void TLBWrite(usf_state_t * state, unsigned int idx)
{
   if (state->r4300emu != CORE_PURE_INTERPRETER)
   {
      unsigned int i;
      if (state->tlb_e[idx].v_even)
      {
         for (i=state->tlb_e[idx].start_even>>12; i<=state->tlb_e[idx].end_even>>12; i++)
         {
            if(!state->invalid_code[i] &&(state->invalid_code[state->tlb_LUT_r[i]>>12] ||
               state->invalid_code[(state->tlb_LUT_r[i]>>12)+0x20000]))
               state->invalid_code[i] = 1;
            if (!state->invalid_code[i])
            {
                /*int j;
                md5_state_t state;
                md5_byte_t digest[16];
                md5_init(&state);
                md5_append(&state, 
                       (const md5_byte_t*)&state->g_rdram[(state->tlb_LUT_r[i]&0x7FF000)/4],
                       0x1000);
                md5_finish(&state, digest);
                for (j=0; j<16; j++) state->blocks[i]->md5[j] = digest[j];*/
                
                state->blocks[i]->adler32 = (unsigned int) adler32(0, (const unsigned char *)&state->g_rdram[(state->tlb_LUT_r[i]&0x7FF000)/4], 0x1000);
                
                state->invalid_code[i] = 1;
            }
            else if (state->blocks[i])
            {
               /*int j;
                for (j=0; j<16; j++) state->blocks[i]->md5[j] = 0;*/
               state->blocks[i]->adler32 = 0;
            }
         }
      }
      if (state->tlb_e[idx].v_odd)
      {
         for (i=state->tlb_e[idx].start_odd>>12; i<=state->tlb_e[idx].end_odd>>12; i++)
         {
            if(!state->invalid_code[i] &&(state->invalid_code[state->tlb_LUT_r[i]>>12] ||
               state->invalid_code[(state->tlb_LUT_r[i]>>12)+0x20000]))
               state->invalid_code[i] = 1;
            if (!state->invalid_code[i])
            {
               /*int j;
               md5_state_t state;
               md5_byte_t digest[16];
               md5_init(&state);
               md5_append(&state, 
                      (const md5_byte_t*)&state->g_rdram[(state->tlb_LUT_r[i]&0x7FF000)/4],
                      0x1000);
               md5_finish(&state, digest);
               for (j=0; j<16; j++) state->blocks[i]->md5[j] = digest[j];*/
                
               state->blocks[i]->adler32 = (unsigned int) adler32(0, (const unsigned char *)&state->g_rdram[(state->tlb_LUT_r[i]&0x7FF000)/4], 0x1000);
                
               state->invalid_code[i] = 1;
            }
            else if (state->blocks[i])
            {
               /*int j;
               for (j=0; j<16; j++) state->blocks[i]->md5[j] = 0;*/
               state->blocks[i]->adler32 = 0;
            }
         }
      }
   }

   tlb_unmap(state, &state->tlb_e[idx]);

   state->tlb_e[idx].g = (state->g_cp0_regs[CP0_ENTRYLO0_REG] & state->g_cp0_regs[CP0_ENTRYLO1_REG] & 1);
   state->tlb_e[idx].pfn_even = (state->g_cp0_regs[CP0_ENTRYLO0_REG] & 0x3FFFFFC0) >> 6;
   state->tlb_e[idx].pfn_odd = (state->g_cp0_regs[CP0_ENTRYLO1_REG] & 0x3FFFFFC0) >> 6;
   state->tlb_e[idx].c_even = (state->g_cp0_regs[CP0_ENTRYLO0_REG] & 0x38) >> 3;
   state->tlb_e[idx].c_odd = (state->g_cp0_regs[CP0_ENTRYLO1_REG] & 0x38) >> 3;
   state->tlb_e[idx].d_even = (state->g_cp0_regs[CP0_ENTRYLO0_REG] & 0x4) >> 2;
   state->tlb_e[idx].d_odd = (state->g_cp0_regs[CP0_ENTRYLO1_REG] & 0x4) >> 2;
   state->tlb_e[idx].v_even = (state->g_cp0_regs[CP0_ENTRYLO0_REG] & 0x2) >> 1;
   state->tlb_e[idx].v_odd = (state->g_cp0_regs[CP0_ENTRYLO1_REG] & 0x2) >> 1;
   state->tlb_e[idx].asid = (state->g_cp0_regs[CP0_ENTRYHI_REG] & 0xFF);
   state->tlb_e[idx].vpn2 = (state->g_cp0_regs[CP0_ENTRYHI_REG] & 0xFFFFE000) >> 13;
   //state->tlb_e[idx].r = (state->g_cp0_regs[CP0_ENTRYHI_REG] & 0xC000000000000000LL) >> 62;
   state->tlb_e[idx].mask = (state->g_cp0_regs[CP0_PAGEMASK_REG] & 0x1FFE000) >> 13;
   
   state->tlb_e[idx].start_even = state->tlb_e[idx].vpn2 << 13;
   state->tlb_e[idx].end_even = state->tlb_e[idx].start_even+
     (state->tlb_e[idx].mask << 12) + 0xFFF;
   state->tlb_e[idx].phys_even = state->tlb_e[idx].pfn_even << 12;
   

   state->tlb_e[idx].start_odd = state->tlb_e[idx].end_even+1;
   state->tlb_e[idx].end_odd = state->tlb_e[idx].start_odd+
     (state->tlb_e[idx].mask << 12) + 0xFFF;
   state->tlb_e[idx].phys_odd = state->tlb_e[idx].pfn_odd << 12;
   
   tlb_map(state, &state->tlb_e[idx]);

   if (state->r4300emu != CORE_PURE_INTERPRETER)
   {
      unsigned int i;
      if (state->tlb_e[idx].v_even)
      {    
         for (i=state->tlb_e[idx].start_even>>12; i<=state->tlb_e[idx].end_even>>12; i++)
         {
            /*if (state->blocks[i] && (state->blocks[i]->md5[0] || state->blocks[i]->md5[1] ||
                  state->blocks[i]->md5[2] || state->blocks[i]->md5[3]))
            {
               int j;
               int equal = 1;
               md5_state_t state;
               md5_byte_t digest[16];
               md5_init(&state);
               md5_append(&state, 
                  (const md5_byte_t*)&state->g_rdram[(state->tlb_LUT_r[i]&0x7FF000)/4],
                  0x1000);
               md5_finish(&state, digest);
               for (j=0; j<16; j++)
                 if (digest[j] != state->blocks[i]->md5[j])
                   equal = 0;
               if (equal) state->invalid_code[i] = 0;
               }*/
               if(state->blocks[i] && state->blocks[i]->adler32)
               {
                  if(state->blocks[i]->adler32 == adler32(0,(const unsigned char *)&state->g_rdram[(state->tlb_LUT_r[i]&0x7FF000)/4],0x1000))
                     state->invalid_code[i] = 0;
               }
         }
      }

      if (state->tlb_e[idx].v_odd)
      {    
         for (i=state->tlb_e[idx].start_odd>>12; i<=state->tlb_e[idx].end_odd>>12; i++)
         {
            /*if (state->blocks[i] && (state->blocks[i]->md5[0] || state->blocks[i]->md5[1] ||
                  state->blocks[i]->md5[2] || state->blocks[i]->md5[3]))
              {
            int j;
            int equal = 1;
            md5_state_t state;
            md5_byte_t digest[16];
            md5_init(&state);
            md5_append(&state, 
                   (const md5_byte_t*)&state->g_rdram[(state->tlb_LUT_r[i]&0x7FF000)/4],
                   0x1000);
            md5_finish(&state, digest);
            for (j=0; j<16; j++)
              if (digest[j] != state->blocks[i]->md5[j])
                equal = 0;
            if (equal) state->invalid_code[i] = 0;
            }*/
            if(state->blocks[i] && state->blocks[i]->adler32)
            {
               if(state->blocks[i]->adler32 == adler32(0,(const unsigned char *)&state->g_rdram[(state->tlb_LUT_r[i]&0x7FF000)/4],0x1000))
                  state->invalid_code[i] = 0;
            }
         }
      }
   }
}

DECLARE_INSTRUCTION(TLBWI)
{
   TLBWrite(state, state->g_cp0_regs[CP0_INDEX_REG]&0x3F);
   ADD_TO_PC(1);
}

DECLARE_INSTRUCTION(TLBWR)
{
   update_count(state);
   state->g_cp0_regs[CP0_RANDOM_REG] = (state->g_cp0_regs[CP0_COUNT_REG]/2 % (32 - state->g_cp0_regs[CP0_WIRED_REG]))
                              + state->g_cp0_regs[CP0_WIRED_REG];
   TLBWrite(state, state->g_cp0_regs[CP0_RANDOM_REG]);
   ADD_TO_PC(1);
}

DECLARE_INSTRUCTION(TLBP)
{
   int i;
   state->g_cp0_regs[CP0_INDEX_REG] |= 0x80000000;
   for (i=0; i<32; i++)
   {
      if (((state->tlb_e[i].vpn2 & (~state->tlb_e[i].mask)) ==
         (((state->g_cp0_regs[CP0_ENTRYHI_REG] & 0xFFFFE000) >> 13) & (~state->tlb_e[i].mask))) &&
        ((state->tlb_e[i].g) ||
         (state->tlb_e[i].asid == (state->g_cp0_regs[CP0_ENTRYHI_REG] & 0xFF))))
      {
         state->g_cp0_regs[CP0_INDEX_REG] = i;
         break;
      }
   }
   ADD_TO_PC(1);
}

DECLARE_INSTRUCTION(ERET)
{
   update_count(state);
   if (state->g_cp0_regs[CP0_STATUS_REG] & 0x4)
   {
     DebugMessage(state, M64MSG_ERROR, "error in ERET");
     state->stop=1;
   }
   else
   {
     state->g_cp0_regs[CP0_STATUS_REG] &= ~0x2;
     generic_jump_to(state, state->g_cp0_regs[CP0_EPC_REG]);
   }
   state->llbit = 0;
   check_interupt(state);
   state->last_addr = PCADDR;
   if (state->cycle_count >= 0) gen_interupt(state);
}
