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/* abstract.c -- Abstract entities
   Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
 
This file is part of OpenRISC 1000 Architectural Simulator.
 
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
 
/* Abstract memory and routines that go with this. I need to
add all sorts of other abstract entities. Currently we have
only memory. */
 
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
 
#include "config.h"
#include "sim-config.h"
 
#include "parse.h"
#include "abstract.h"
#include "labels.h"
#include "arch.h"
#include "execute.h"
#include "sprs.h"
#include "stats.h"
#include "except.h"
#include "debug_unit.h"
#include "opcode/or32.h"
 
extern unsigned long reg[];
extern char *disassembled;
 
/* This is an abstract+physical memory array rather than only physical
   memory array */
static struct mem_entry *simmem;
 
/* Pointer to memory area descriptions that are assigned to individual
   peripheral devices. */
struct dev_memarea *dev_list;
 
/* Temporary variable to increase speed.  */
struct dev_memarea *cur_area;
 
/* Virtual address of current access. */
unsigned long cur_vadd;
 
/* It returns physical address. */
inline unsigned long translate_vrt_to_phy_add(unsigned long virtaddr, int write_access)
{
  if (config.ic.tagtype == CT_NONE)
    return virtaddr;
  else
    if (config.ic.tagtype == CT_VIRTUAL) {
      return immu_translate(virtaddr, write_access);
    }
    else if (config.dc.tagtype == CT_PHYSICAL) {
      unsigned long phyaddr = immu_translate(virtaddr, write_access);
      return phyaddr;
    }
    else {
      printf("INTERNAL ERROR: Unknown insn cache type.\n");
      cont_run = 0;
    }
 
  return -1;
}
 
/* Calls IMMU translation routines before simulating insn
cache for virtually indexed insn cache or after simulating insn cache
for physically indexed insn cache. It returns physical address. */
 
unsigned long simulate_ic_mmu_fetch(unsigned long virtaddr)
{
 
  unsigned long phyaddr;
 
  if ((phyaddr = translate_vrt_to_phy_add(virtaddr, 0)) != -1) {
    ic_simulate_fetch(phyaddr);
    return phyaddr;
  }
  else {
    printf("INTERNAL ERROR: Unknown insn cache type.\n");
    cont_run = 0;
  }
  return -1;
}
 
/* Calls DMMU translation routines (load cycles) before simulating data
   cache for virtually indexed data cache or after simulating data cache
   for physically indexed data cache. It returns physical address. */
 
unsigned long simulate_dc_mmu_load(unsigned long virtaddr)
{
  if (config.dc.tagtype == CT_NONE)
    return virtaddr;
  else
  if (config.dc.tagtype == CT_VIRTUAL) {
    dc_simulate_read(virtaddr);
    return dmmu_translate(virtaddr, 0);
  }
  else if (config.dc.tagtype == CT_PHYSICAL) {
    unsigned long phyaddr = dmmu_translate(virtaddr, 0);
    dc_simulate_read(phyaddr);
    return phyaddr;
  }
  else {
    printf("INTERNAL ERROR: Unknown data cache type.\n");
    cont_run = 0;
  }
 
  return -1;
}
 
/* Calls DMMU translation routines (store cycles) before simulating data
cache for virtually indexed data cache or after simulating data cache
for physically indexed data cache. It returns physical address. */
 
unsigned long simulate_dc_mmu_store(unsigned long virtaddr)
{
  if (config.dc.tagtype == CT_NONE)
    return virtaddr;
  else
  if (config.dc.tagtype == CT_VIRTUAL) {
    dc_simulate_write(virtaddr);
    return dmmu_translate(virtaddr, 1);
  }
  else if (config.dc.tagtype == CT_PHYSICAL) {
    unsigned long phyaddr = dmmu_translate(virtaddr, 1);
    dc_simulate_write(phyaddr);
    return phyaddr;
  }
  else {
    printf("INTERNAL ERROR: Unknown data cache type.\n");
    cont_run = 0;
  }
 
  return -1;
}
 
/* Calculates bit mask to fit the data */
unsigned long bit_mask (unsigned long data) {
  int i = 0;
  data--;
  while (data >> i)
    data |= 1 << i++;
  return data;
}
 
/* Register read and write function for a memory area.
   addr is inside the area, if addr & addr_mask == addr_compare
   (used also by peripheral devices like 16450 UART etc.) */
void register_memoryarea_mask(unsigned long addr_mask, unsigned long addr_compare,
                         unsigned long size, unsigned granularity,
                         unsigned long (readfunc)(unsigned long),
                         void (writefunc)(unsigned long, unsigned long))
{
  struct dev_memarea **pptmp;
  unsigned long size_mask = bit_mask (size);
  int found_error = 0;
  addr_compare &= addr_mask;
 
  debug(5, "addr & %08x == %08x to %08x, size %08x, gran %iB\n", addr_mask, addr_compare, addr_compare | bit_mask (size), size, granularity);
  /* Go to the end of the list. */
  for(pptmp = &dev_list; *pptmp; pptmp = &(*pptmp)->next)
    if ((addr_compare >= (*pptmp)->addr_compare) && (addr_compare < (*pptmp)->addr_compare + (*pptmp)->size)
     || (addr_compare + size > (*pptmp)->addr_compare) && (addr_compare < (*pptmp)->addr_compare + (*pptmp)->size)) {
      if (!found_error) {
        fprintf (stderr, "ERROR: Overlapping memory area(s):\n");
        fprintf (stderr, "\taddr & %08x == %08x to %08x, size %08x, gran %iB\n", addr_mask, addr_compare, addr_compare | bit_mask (size), size, granularity);
      }
      found_error = 1;
      fprintf (stderr, "and\taddr & %08x == %08x to %08x, size %08x, gran %iB\n", (*pptmp)->addr_mask, (*pptmp)->addr_compare,
        (*pptmp)->addr_compare | (*pptmp)->size_mask, (*pptmp)->size, (*pptmp)->granularity);
    }
 
  if (found_error)
    exit (-1);
 
  cur_area = *pptmp = (struct dev_memarea *)malloc(sizeof(struct dev_memarea));
  (*pptmp)->addr_mask = addr_mask;
  (*pptmp)->addr_compare = addr_compare;
  (*pptmp)->size = size;
  (*pptmp)->size_mask = size_mask;
  (*pptmp)->granularity = granularity;
  (*pptmp)->readfunc = readfunc;
  (*pptmp)->writefunc = writefunc;
  (*pptmp)->log = 0;
  (*pptmp)->next = NULL;
}
 
/* Register read and write function for a memory area.
   Memory areas should be aligned. Memory area is rounded up to
   fit the nearest 2^n aligment.
   (used also by peripheral devices like 16450 UART etc.) */
void register_memoryarea(unsigned long addr,
                         unsigned long size, unsigned granularity,
                         unsigned long (readfunc)(unsigned long),
                         void (writefunc)(unsigned long, unsigned long))
{
  unsigned long size_mask = bit_mask (size);
  unsigned long addr_mask = ~size_mask;
  register_memoryarea_mask (addr_mask, addr & addr_mask,
                      size_mask + 1, granularity,
                      readfunc, writefunc);
}
 
 
/* Check if access is to registered area of memory. */
struct dev_memarea *verify_memoryarea(unsigned long addr)
{
  struct dev_memarea *ptmp;
 
  /* Check list of registered devices. */
  for(ptmp = dev_list; ptmp; ptmp = ptmp->next)
    if ((addr & ptmp->addr_mask) == ptmp->addr_compare)
      return cur_area = ptmp;
  return cur_area = NULL;
}
 
/* Returns 32-bit values from mem array. Big endian version. */
unsigned long read_mem(unsigned long memaddr,int* breakpoint)
{
  unsigned long temp;
  struct dev_memarea *dev;
 
  cur_vadd = memaddr;
  if (DEBUG_ENABLED)
    *breakpoint += CheckDebugUnit(DebugLoadAddress,memaddr); /* 28/05/01 CZ */
  temp = evalsim_mem32(memaddr);
  if (DEBUG_ENABLED)
    *breakpoint += CheckDebugUnit(DebugLoadData,temp);  /* MM170901 */
  return temp;
}
 
/* Returns 32-bit values from mem array. Big endian version. */
unsigned long eval_mem32(unsigned long memaddr,int* breakpoint)
{
 
  unsigned long temp;
  struct dev_memarea *dev;
 
  cur_vadd = memaddr;
  memaddr = simulate_dc_mmu_load(memaddr);
  if (pending.valid)
    return 0;
  if (DEBUG_ENABLED)
    *breakpoint += CheckDebugUnit(DebugLoadAddress,memaddr); /* 28/05/01 CZ */
  temp = evalsim_mem32(memaddr);
  if (DEBUG_ENABLED)
    *breakpoint += CheckDebugUnit(DebugLoadData,temp);  /* MM170901 */
  return temp;
}
 
/* Returns 32-bit values from mem array. Big endian version. */
unsigned long eval_insn(unsigned long memaddr,int* breakpoint)
{
 
  unsigned long temp;
  struct dev_memarea *dev;
 
//  memaddr = simulate_ic_mmu_fetch(memaddr);
  cur_vadd = pc;
  ic_simulate_fetch(memaddr);
  if (DEBUG_ENABLED)
    *breakpoint += CheckDebugUnit(DebugLoadAddress,memaddr); /* 28/05/01 CZ */
  temp = evalsim_mem32(memaddr);
  if (DEBUG_ENABLED)
    *breakpoint += CheckDebugUnit(DebugLoadData,temp);  /* MM170901 */
  return temp;
}
 
unsigned long evalsim_mem32(unsigned long memaddr)
{
  unsigned long temp;
 
  if (verify_memoryarea(memaddr)) {
    switch(cur_area->granularity) {
    case 1:
      temp = cur_area->readfunc(memaddr) << 24;
      temp |= cur_area->readfunc(memaddr + 1) << 16;
      temp |= cur_area->readfunc(memaddr + 2) << 8;
      temp |= cur_area->readfunc(memaddr + 3);
      break;
    case 2:
      temp = cur_area->readfunc(memaddr) << 16;
      temp |= cur_area->readfunc(memaddr + 2);
      break;
    case 4:
      temp = cur_area->readfunc(memaddr);
      break;
    }
    if (cur_area->log)
      fprintf (cur_area->log, "[%08x] -> read %08x\n", memaddr, temp);
  } else {
    printf("EXCEPTION: read out of memory (32-bit access to %.8lx)\n", memaddr);
    except_handle(EXCEPT_BUSERR, cur_vadd);
    temp = 0;
  }
  return temp;
}
 
/* Returns 16-bit values from mem array. Big endian version. */
 
unsigned short eval_mem16(unsigned long memaddr,int* breakpoint)
{
  unsigned short temp;
  cur_vadd = memaddr;
  memaddr = simulate_dc_mmu_load(memaddr);
  if (pending.valid)
    return 0;
  if (DEBUG_ENABLED)
    *breakpoint += CheckDebugUnit(DebugLoadAddress,memaddr); /* 28/05/01 CZ */
 
  temp = evalsim_mem16(memaddr);
  if (DEBUG_ENABLED)
    *breakpoint += CheckDebugUnit(DebugLoadData,temp);  /* MM170901 */
  return temp;
}
 
unsigned short evalsim_mem16(unsigned long memaddr)
{
  unsigned short temp;
 
  if (verify_memoryarea(memaddr)) {
    switch(cur_area->granularity) {
    case 1:
      temp = cur_area->readfunc(memaddr) << 8;
      temp |= cur_area->readfunc(memaddr + 1);
      break;
    case 2:
      temp = cur_area->readfunc(memaddr);
      break;
    case 4:
      printf("EXCEPTION: read 16-bit value from 32-bit region (address 0x%08lX)\n", cur_area->granularity * 8, memaddr);
      cont_run = 0;
      break;
    }
    if (cur_area->log)
      fprintf (cur_area->log, "[%08x] -> read %08x\n", memaddr, temp);
  } else {
    printf("EXCEPTION: read out of memory (16-bit access to %.8lx)\n", memaddr);
    except_handle(EXCEPT_BUSERR, cur_vadd);
    temp = 0;
  }
  return temp;
}
 
 
/* Returns 8-bit values from mem array. */
 
unsigned char eval_mem8(unsigned long memaddr,int* breakpoint)
{
  unsigned char temp;
  cur_vadd = memaddr;
  memaddr = simulate_dc_mmu_load(memaddr);
  if (pending.valid)
    return 0;
  if (DEBUG_ENABLED)
    *breakpoint += CheckDebugUnit(DebugLoadAddress,memaddr);  /* 28/05/01 CZ */
 
  temp = evalsim_mem8(memaddr);
  if (DEBUG_ENABLED)
    *breakpoint += CheckDebugUnit(DebugLoadData,temp);  /* MM170901 */
  return temp;
}
 
unsigned char evalsim_mem8(unsigned long memaddr)
{
  unsigned char temp;
 
  if (verify_memoryarea(memaddr)) {
    switch(cur_area->granularity) {
    case 1:
      temp = cur_area->readfunc(memaddr);
      break;
    case 2:
    case 4:
      printf("EXCEPTION: read 8-bit value from %u-bit region (address 0x%08lX)\n", cur_area->granularity * 8, memaddr);
      cont_run = 0;
      break;
    }
    if (cur_area->log)
      fprintf (cur_area->log, "[%08x] -> read %08x\n", memaddr, temp);
  } else {
    printf("EXCEPTION: read out of memory (8-bit access to %.8lx)\n", memaddr);
    except_handle(EXCEPT_BUSERR, cur_vadd);
    temp = 0;
  }
  return temp;
}
 
/* Set mem, 32-bit. Big endian version. */
 
void set_mem32(unsigned long memaddr, unsigned long value,int* breakpoint)
{
  cur_vadd = memaddr;
  memaddr = simulate_dc_mmu_store(memaddr);
 
  /* If we produced exception don't set anything */
  if (pending.valid == 1)
    return;
 
  if (DEBUG_ENABLED) {
    *breakpoint += CheckDebugUnit(DebugStoreAddress,memaddr);  /* 28/05/01 CZ */
    *breakpoint += CheckDebugUnit(DebugStoreData,value);
  }
 
  setsim_mem32(memaddr, value);
}
 
void setsim_mem32(unsigned long memaddr, unsigned long value)
{
  struct dev_memarea *dev;
 
  if (verify_memoryarea(memaddr)) {
    if (cur_area->log)
      fprintf (cur_area->log, "[%08x] -> write %08x\n", memaddr, value);
    switch(cur_area->granularity) {
    case 1:
      cur_area->writefunc(memaddr    , (value >> 24) & 0xFF);
      cur_area->writefunc(memaddr + 1, (value >> 16) & 0xFF);
      cur_area->writefunc(memaddr + 2, (value >>  8) & 0xFF);
      cur_area->writefunc(memaddr + 3, (value      ) & 0xFF);
      break;
    case 2:
      cur_area->writefunc(memaddr, (value >> 16) & 0xFFFF);
      cur_area->writefunc(memaddr + 2, value & 0xFFFF);
      break;
    case 4:
      cur_area->writefunc(memaddr, value);
      break;
    }
  } else {
    printf("EXCEPTION: write out of memory (32-bit access to %.8lx)\n", memaddr);
    except_handle(EXCEPT_BUSERR, cur_vadd);
  }
}
 
/* Set mem, 16-bit. Big endian version. */
 
void set_mem16(unsigned long memaddr, unsigned short value,int* breakpoint)
{
  cur_vadd = memaddr;
  memaddr = simulate_dc_mmu_store(memaddr);
 
  /* If we produced exception don't set anything */
  if (pending.valid == 1)
    return;
 
  if (DEBUG_ENABLED) {
    *breakpoint += CheckDebugUnit(DebugStoreAddress,memaddr);  /* 28/05/01 CZ */
    *breakpoint += CheckDebugUnit(DebugStoreData,value);
  }
 
  setsim_mem16(memaddr, value);
}
 
void setsim_mem16(unsigned long memaddr, unsigned short value)
{
  if (verify_memoryarea(memaddr)) {
    if (cur_area->log)
      fprintf (cur_area->log, "[%08x] -> write %08x\n", memaddr, value);
    switch(cur_area->granularity) {
    case 1:
      cur_area->writefunc(memaddr, (value >> 8) & 0xFF);
      cur_area->writefunc(memaddr + 1, value & 0xFF);
      break;
    case 2:
      cur_area->writefunc(memaddr, value & 0xFFFF);
      break;
    case 4:
      printf("EXCEPTION: write 16-bit value to 32-bit region (address 0x%08lX)\n", memaddr);
      cont_run = 0;
      break;
    }
  } else {
    printf("EXCEPTION: write out of memory (16-bit access to %.8lx)\n", memaddr);
    except_handle(EXCEPT_BUSERR, cur_vadd);
  }
}
 
/* Set mem, 8-bit. */
 
void set_mem8(unsigned long memaddr, unsigned char value,int* breakpoint)
{
  cur_vadd = memaddr;
  memaddr = simulate_dc_mmu_store(memaddr);
 
  /* If we produced exception don't set anything */
  if (pending.valid == 1)
    return;
 
  if (DEBUG_ENABLED) {
    *breakpoint += CheckDebugUnit(DebugStoreAddress,memaddr);  /* 28/05/01 CZ */
    *breakpoint += CheckDebugUnit(DebugStoreData,value);
  }
 
  setsim_mem8(memaddr, value);
}
 
void setsim_mem8(unsigned long memaddr, unsigned char value)
{
  if (verify_memoryarea(memaddr)) {
    if (cur_area->log)
      fprintf (cur_area->log, "[%08x] -> write %08x\n", memaddr, value);
    if (cur_area->granularity == 1)
      cur_area->writefunc(memaddr, value);
    else {
      printf("EXCEPTION: write 8-bit value to %u-bit region (address 0x%08lX)\n", cur_area->granularity * 8, memaddr);
      cont_run = 0;
    }
  } else {
    printf("EXCEPTION: write out of memory (8-bit access to %.8lx)\n", memaddr);
    except_handle(EXCEPT_BUSERR, cur_vadd);
  }
}
 
void dumpmemory(unsigned int from, unsigned int to, int disasm, int nl)
{
  unsigned int i, j;
  struct label_entry *tmp;
  int breakpoint = 0;
  int ilen = disasm ? 4 : 16;
 
  for(i = from; i < to; i += ilen) {
    printf("%.8x: ", i);
    for (j = 0; j < ilen;) {
      int data = -1;
      if (!disasm) {
        tmp = NULL;
        if (verify_memoryarea(i+j)) {
          struct label_entry *entry;
          entry = get_label(i + j);
          if (entry)
            printf("(%s)", entry->name);
          printf("%02x ", data = evalsim_mem8(i+j));
        } else printf("XX ");
        j++;
      } else {
        int breakpoint;
        unsigned int _insn = read_mem(i, &breakpoint);
        int index = insn_decode (_insn);
        int len = insn_len (index);
 
        tmp = NULL;
        if (verify_memoryarea(i+j)) {
          struct label_entry *entry;
          entry = get_label(i + j);
          if (entry)
            printf("(%s)", entry->name);
 
          printf(": %08x ", (unsigned long)_insn);
          if (index >= 0) {
            disassemble_insn (_insn);
            printf(" %s", disassembled);
          } else
            printf("<invalid>");
        } else printf("XXXXXXXX");
        j += len;
      }
    }
    if (nl)
      printf ("\n");
  }
}
 
 
unsigned long simmem_read_byte(unsigned long addr) {
  return simmem[cur_area->misc + (addr & cur_area->size_mask)].data;
}
 
void simmem_write_byte(unsigned long addr, unsigned long value) {
  simmem[cur_area->misc + (addr & cur_area->size_mask)].data = (unsigned char)value;
}
 
unsigned long simmem_read_zero(unsigned long addr) {
  if (config.sim.verbose)
    fprintf (stderr, "WARNING: memory read from non-read memory area 0x%08x.\n", addr);
  return 0;
}
 
void simmem_write_null(unsigned long addr, unsigned long value) {
  if (config.sim.verbose)
    fprintf (stderr, "WARNING: memory write to 0x%08x, non-write memory area (value 0x%08x).\n", addr, value);
}
 
/* Initialize memory table from a config struct */
 
void init_memory_table ()
{
  unsigned long memory_needed = 0;
 
  /* If nothing was defined, use default memory block */
  if (config.memory.nmemories) {
    int i;
    for (i = 0; i < config.memory.nmemories; i++) {
      unsigned long start = config.memory.table[i].baseaddr;
      unsigned long length = config.memory.table[i].size;
      char *type = config.memory.table[i].name;
      int rd = config.memory.table[i].delayr;
      int wd = config.memory.table[i].delayw;
      int ce = config.memory.table[i].ce;
      if (config.sim.verbose)
        debug (1, "%08X %08X (%i KB): %s (activated by CE%i; read delay = %icyc, write delay = %icyc)\n",
          start, length, length >> 10, type, ce, rd, wd);
      register_memoryarea(start, length, 1, &simmem_read_byte, &simmem_write_byte);
      cur_area->misc = memory_needed;
      cur_area->delayw = wd;
      cur_area->delayr = rd;
      if (config.memory.table[i].log[0] != '\0') {
        if ((cur_area->log = fopen (config.memory.table[i].log, "wt+")) == NULL)
          fprintf (stderr, "WARNING: Cannot open '%s'.\n", config.memory.table[i].log);
      } else
        cur_area->log = 0;
      memory_needed += cur_area->size;
    }
    printf ("\n");
  } else {
    if (config.sim.verbose)
      fprintf (stderr, "WARNING: Memory not defined, assuming standard configuration.\n");
    register_memoryarea(DEFAULT_MEMORY_START, DEFAULT_MEMORY_LEN, 1, &simmem_read_byte, &simmem_write_byte);
    memory_needed += cur_area->size;
  }
 
  simmem = (struct mem_entry *) malloc (sizeof (struct mem_entry) * memory_needed);
  if (!simmem) {
    fprintf (stderr, "Failed to allocate sim memory. Aborting\n");
    exit (-1);
  }
}
 
/* Changes read/write memory in read/write only */
 
void lock_memory_table ()
{
  struct dev_memarea *ptmp;
 
  /* Check list of registered devices. */
  for(ptmp = dev_list; ptmp; ptmp = ptmp->next) {
    if (ptmp->delayr < 0 && ptmp->readfunc == &simmem_read_byte)
      ptmp->readfunc = &simmem_read_zero;
    if (ptmp->delayw < 0 && ptmp->writefunc == &simmem_write_byte)
      ptmp->writefunc = &simmem_write_null;
  }
}
 
/* Closes files, etc. */
 
void done_memory_table ()
{
  struct dev_memarea *ptmp;
 
  /* Check list of registered devices. */
  for(ptmp = dev_list; ptmp; ptmp = ptmp->next) {
    if (ptmp->log)
      fclose (ptmp->log);
  }
}
 
/* Displays current memory configuration */
 
void memory_table_status ()
{
  struct dev_memarea *ptmp;
 
  /* Check list of registered devices. */
  for(ptmp = dev_list; ptmp; ptmp = ptmp->next) {
    printf ("addr & %08x == %08x to %08x, size %08x, gran %iB\n",
      ptmp->addr_mask, ptmp->addr_compare, ptmp->addr_compare | bit_mask (ptmp->size),
      ptmp->size, ptmp->granularity);
    printf ("\t");
    if (ptmp->delayr >= 0)
      printf ("read delay = %i cycles, ", ptmp->delayr);
    else
      printf ("reads not possible, ");
 
    if (ptmp->delayw >= 0)
      printf ("write delay = %i cycles", ptmp->delayw);
    else
      printf ("writes not possible");
 
    if (ptmp->log)
      printf (", (logged)\n");
    else
      printf ("\n");
  }
}
 
/* Outputs time in pretty form to dest string */
 
void generate_time_pretty (char *dest, long time_ps)
{
  int exp3 = 0;
  if (time_ps) {
    while ((time_ps % 1000) == 0) {
      time_ps /= 1000;
      exp3++;
    }
  }
  sprintf (dest, "%i%cs", time_ps, "pnum"[exp3]);
}

Line No.	Rev	Author	Line
1	2	cvs	`/* abstract.c -- Abstract entities`
2			`Copyright (C) 1999 Damjan Lampret, lampret@opencores.org`
3
4			`This file is part of OpenRISC 1000 Architectural Simulator.`
5
6			`This program is free software; you can redistribute it and/or modify`
7			`it under the terms of the GNU General Public License as published by`
8			`the Free Software Foundation; either version 2 of the License, or`
9			`(at your option) any later version.`
10
11			`This program is distributed in the hope that it will be useful,`
12			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
13			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
14			`GNU General Public License for more details.`
15
16			`You should have received a copy of the GNU General Public License`
17			`along with this program; if not, write to the Free Software`
18			`Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */`
19
20	66	lampret	`/* Abstract memory and routines that go with this. I need to`
21	2	cvs	`add all sorts of other abstract entities. Currently we have`
22			`only memory. */`
23
24	221	markom	`#include <stdlib.h>`
25	2	cvs	`#include <stdio.h>`
26			`#include <ctype.h>`
27			`#include <string.h>`
28
29	6	lampret	`#include "config.h"`
30	7	jrydberg	`#include "sim-config.h"`
31	6	lampret
32	2	cvs	`#include "parse.h"`
33			`#include "abstract.h"`
34	261	markom	`#include "labels.h"`
35	2	cvs	`#include "arch.h"`
36			`#include "execute.h"`
37	32	lampret	`#include "sprs.h"`
38	35	lampret	`#include "stats.h"`
39	32	lampret	`#include "except.h"`
40	123	markom	`#include "debug_unit.h"`
41	134	markom	`#include "opcode/or32.h"`
42	2	cvs
43			`extern unsigned long reg[];`
44	138	markom	`extern char *disassembled;`
45	2	cvs
46	28	lampret	`/* This is an abstract+physical memory array rather than only physical`
47			`memory array */`
48	221	markom	`static struct mem_entry *simmem;`
49	2	cvs
50	30	lampret	`/* Pointer to memory area descriptions that are assigned to individual`
51			`peripheral devices. */`
52			`struct dev_memarea *dev_list;`
53
54	221	markom	`/* Temporary variable to increase speed. */`
55			`struct dev_memarea *cur_area;`
56
57	525	simons	`/* Virtual address of current access. */`
58			`unsigned long cur_vadd;`
59
60	349	simons	`/* It returns physical address. */`
61	430	markom	`inline unsigned long translate_vrt_to_phy_add(unsigned long virtaddr, int write_access)`
62	77	lampret	`{`
63	429	markom	`if (config.ic.tagtype == CT_NONE)`
64	239	markom	`return virtaddr;`
65			`else`
66	429	markom	`if (config.ic.tagtype == CT_VIRTUAL) {`
67	430	markom	`return immu_translate(virtaddr, write_access);`
68	239	markom	`}`
69	429	markom	`else if (config.dc.tagtype == CT_PHYSICAL) {`
70	430	markom	`unsigned long phyaddr = immu_translate(virtaddr, write_access);`
71	239	markom	`return phyaddr;`
72			`}`
73			`else {`
74			`printf("INTERNAL ERROR: Unknown insn cache type.\n");`
75			`cont_run = 0;`
76			`}`
77	221	markom
78	239	markom	`return -1;`
79	77	lampret	`}`
80
81	349	simons	`/* Calls IMMU translation routines before simulating insn`
82			`cache for virtually indexed insn cache or after simulating insn cache`
83			`for physically indexed insn cache. It returns physical address. */`
84
85			`unsigned long simulate_ic_mmu_fetch(unsigned long virtaddr)`
86			`{`
87
88			`unsigned long phyaddr;`
89
90	430	markom	`if ((phyaddr = translate_vrt_to_phy_add(virtaddr, 0)) != -1) {`
91	349	simons	`ic_simulate_fetch(phyaddr);`
92			`return phyaddr;`
93			`}`
94			`else {`
95			`printf("INTERNAL ERROR: Unknown insn cache type.\n");`
96			`cont_run = 0;`
97			`}`
98			`return -1;`
99			`}`
100
101	77	lampret	`/* Calls DMMU translation routines (load cycles) before simulating data`
102	239	markom	`cache for virtually indexed data cache or after simulating data cache`
103			`for physically indexed data cache. It returns physical address. */`
104	6	lampret
105			`unsigned long simulate_dc_mmu_load(unsigned long virtaddr)`
106			`{`
107	429	markom	`if (config.dc.tagtype == CT_NONE)`
108	239	markom	`return virtaddr;`
109			`else`
110	429	markom	`if (config.dc.tagtype == CT_VIRTUAL) {`
111	327	lampret	`dc_simulate_read(virtaddr);`
112	430	markom	`return dmmu_translate(virtaddr, 0);`
113	239	markom	`}`
114	429	markom	`else if (config.dc.tagtype == CT_PHYSICAL) {`
115	430	markom	`unsigned long phyaddr = dmmu_translate(virtaddr, 0);`
116	327	lampret	`dc_simulate_read(phyaddr);`
117	239	markom	`return phyaddr;`
118			`}`
119			`else {`
120	327	lampret	`printf("INTERNAL ERROR: Unknown data cache type.\n");`
121	239	markom	`cont_run = 0;`
122			`}`
123	221	markom
124	239	markom	`return -1;`
125	6	lampret	`}`
126
127	77	lampret	`/* Calls DMMU translation routines (store cycles) before simulating data`
128	6	lampret	`cache for virtually indexed data cache or after simulating data cache`
129			`for physically indexed data cache. It returns physical address. */`
130
131			`unsigned long simulate_dc_mmu_store(unsigned long virtaddr)`
132			`{`
133	429	markom	`if (config.dc.tagtype == CT_NONE)`
134	239	markom	`return virtaddr;`
135			`else`
136	429	markom	`if (config.dc.tagtype == CT_VIRTUAL) {`
137	239	markom	`dc_simulate_write(virtaddr);`
138	430	markom	`return dmmu_translate(virtaddr, 1);`
139	239	markom	`}`
140	429	markom	`else if (config.dc.tagtype == CT_PHYSICAL) {`
141	430	markom	`unsigned long phyaddr = dmmu_translate(virtaddr, 1);`
142	239	markom	`dc_simulate_write(phyaddr);`
143			`return phyaddr;`
144			`}`
145			`else {`
146			`printf("INTERNAL ERROR: Unknown data cache type.\n");`
147			`cont_run = 0;`
148			`}`
149	221	markom
150	239	markom	`return -1;`
151	6	lampret	`}`
152
153	261	markom	`/* Calculates bit mask to fit the data */`
154			`unsigned long bit_mask (unsigned long data) {`
155			`int i = 0;`
156			`data--;`
157	382	markom	`while (data >> i)`
158	261	markom	`data \|= 1 << i++;`
159			`return data;`
160			`}`
161
162			`/* Register read and write function for a memory area.`
163			`addr is inside the area, if addr & addr_mask == addr_compare`
164			`(used also by peripheral devices like 16450 UART etc.) */`
165			`void register_memoryarea_mask(unsigned long addr_mask, unsigned long addr_compare,`
166			`unsigned long size, unsigned granularity,`
167	239	markom	`unsigned long (readfunc)(unsigned long),`
168	261	markom	`void (writefunc)(unsigned long, unsigned long))`
169	30	lampret	`{`
170	239	markom	`struct dev_memarea **pptmp;`
171	261	markom	`unsigned long size_mask = bit_mask (size);`
172			`int found_error = 0;`
173			`addr_compare &= addr_mask;`
174	221	markom
175	382	markom	`debug(5, "addr & %08x == %08x to %08x, size %08x, gran %iB\n", addr_mask, addr_compare, addr_compare \| bit_mask (size), size, granularity);`
176	239	markom	`/* Go to the end of the list. */`
177	261	markom	`for(pptmp = &dev_list; pptmp; pptmp = &(pptmp)->next)`
178			`if ((addr_compare >= (pptmp)->addr_compare) && (addr_compare < (pptmp)->addr_compare + (*pptmp)->size)`
179			`\|\| (addr_compare + size > (pptmp)->addr_compare) && (addr_compare < (pptmp)->addr_compare + (*pptmp)->size)) {`
180	262	markom	`if (!found_error) {`
181	261	markom	`fprintf (stderr, "ERROR: Overlapping memory area(s):\n");`
182	262	markom	`fprintf (stderr, "\taddr & %08x == %08x to %08x, size %08x, gran %iB\n", addr_mask, addr_compare, addr_compare \| bit_mask (size), size, granularity);`
183			`}`
184	261	markom	`found_error = 1;`
185	424	markom	`fprintf (stderr, "and\taddr & %08x == %08x to %08x, size %08x, gran %iB\n", (pptmp)->addr_mask, (pptmp)->addr_compare,`
186	261	markom	`(pptmp)->addr_compare \| (pptmp)->size_mask, (pptmp)->size, (pptmp)->granularity);`
187			`}`
188
189			`if (found_error)`
190			`exit (-1);`
191
192	239	markom	`cur_area = pptmp = (struct dev_memarea )malloc(sizeof(struct dev_memarea));`
193	261	markom	`(*pptmp)->addr_mask = addr_mask;`
194			`(*pptmp)->addr_compare = addr_compare;`
195	239	markom	`(*pptmp)->size = size;`
196	261	markom	`(*pptmp)->size_mask = size_mask;`
197	239	markom	`(*pptmp)->granularity = granularity;`
198			`(*pptmp)->readfunc = readfunc;`
199			`(*pptmp)->writefunc = writefunc;`
200	479	markom	`(*pptmp)->log = 0;`
201	239	markom	`(*pptmp)->next = NULL;`
202	261	markom	`}`
203	221	markom
204	261	markom	`/* Register read and write function for a memory area.`
205			`Memory areas should be aligned. Memory area is rounded up to`
206			`fit the nearest 2^n aligment.`
207			`(used also by peripheral devices like 16450 UART etc.) */`
208			`void register_memoryarea(unsigned long addr,`
209			`unsigned long size, unsigned granularity,`
210			`unsigned long (readfunc)(unsigned long),`
211			`void (writefunc)(unsigned long, unsigned long))`
212			`{`
213			`unsigned long size_mask = bit_mask (size);`
214			`unsigned long addr_mask = ~size_mask;`
215			`register_memoryarea_mask (addr_mask, addr & addr_mask,`
216			`size_mask + 1, granularity,`
217			`readfunc, writefunc);`
218	30	lampret	`}`
219
220	261	markom
221	30	lampret	`/* Check if access is to registered area of memory. */`
222			`struct dev_memarea *verify_memoryarea(unsigned long addr)`
223			`{`
224	239	markom	`struct dev_memarea *ptmp;`
225	221	markom
226	239	markom	`/* Check list of registered devices. */`
227			`for(ptmp = dev_list; ptmp; ptmp = ptmp->next)`
228	261	markom	`if ((addr & ptmp->addr_mask) == ptmp->addr_compare)`
229	239	markom	`return cur_area = ptmp;`
230			`return cur_area = NULL;`
231	30	lampret	`}`
232
233	2	cvs	`/* Returns 32-bit values from mem array. Big endian version. */`
234	349	simons	`unsigned long read_mem(unsigned long memaddr,int* breakpoint)`
235			`{`
236			`unsigned long temp;`
237			`struct dev_memarea *dev;`
238
239	525	simons	`cur_vadd = memaddr;`
240	349	simons	`if (DEBUG_ENABLED)`
241			`breakpoint += CheckDebugUnit(DebugLoadAddress,memaddr); / 28/05/01 CZ */`
242			`temp = evalsim_mem32(memaddr);`
243			`if (DEBUG_ENABLED)`
244			`breakpoint += CheckDebugUnit(DebugLoadData,temp); / MM170901 */`
245			`return temp;`
246			`}`
247
248			`/* Returns 32-bit values from mem array. Big endian version. */`
249	123	markom	`unsigned long eval_mem32(unsigned long memaddr,int* breakpoint)`
250	2	cvs	`{`
251	6	lampret
252	239	markom	`unsigned long temp;`
253			`struct dev_memarea *dev;`
254	123	markom
255	525	simons	`cur_vadd = memaddr;`
256	239	markom	`memaddr = simulate_dc_mmu_load(memaddr);`
257	458	simons	`if (pending.valid)`
258			`return 0;`
259	270	markom	`if (DEBUG_ENABLED)`
260			`breakpoint += CheckDebugUnit(DebugLoadAddress,memaddr); / 28/05/01 CZ */`
261	239	markom	`temp = evalsim_mem32(memaddr);`
262	270	markom	`if (DEBUG_ENABLED)`
263			`breakpoint += CheckDebugUnit(DebugLoadData,temp); / MM170901 */`
264	239	markom	`return temp;`
265	66	lampret	`}`
266
267	349	simons	`/* Returns 32-bit values from mem array. Big endian version. */`
268			`unsigned long eval_insn(unsigned long memaddr,int* breakpoint)`
269			`{`
270
271			`unsigned long temp;`
272			`struct dev_memarea *dev;`
273
274	532	markom	`// memaddr = simulate_ic_mmu_fetch(memaddr);`
275	525	simons	`cur_vadd = pc;`
276	416	simons	`ic_simulate_fetch(memaddr);`
277	349	simons	`if (DEBUG_ENABLED)`
278			`breakpoint += CheckDebugUnit(DebugLoadAddress,memaddr); / 28/05/01 CZ */`
279			`temp = evalsim_mem32(memaddr);`
280			`if (DEBUG_ENABLED)`
281			`breakpoint += CheckDebugUnit(DebugLoadData,temp); / MM170901 */`
282			`return temp;`
283			`}`
284
285	221	markom	`unsigned long evalsim_mem32(unsigned long memaddr)`
286	66	lampret	`{`
287	239	markom	`unsigned long temp;`
288	221	markom
289	239	markom	`if (verify_memoryarea(memaddr)) {`
290			`switch(cur_area->granularity) {`
291			`case 1:`
292			`temp = cur_area->readfunc(memaddr) << 24;`
293			`temp \|= cur_area->readfunc(memaddr + 1) << 16;`
294			`temp \|= cur_area->readfunc(memaddr + 2) << 8;`
295			`temp \|= cur_area->readfunc(memaddr + 3);`
296			`break;`
297			`case 2:`
298			`temp = cur_area->readfunc(memaddr) << 16;`
299			`temp \|= cur_area->readfunc(memaddr + 2);`
300			`break;`
301			`case 4:`
302			`temp = cur_area->readfunc(memaddr);`
303			`break;`
304	426	markom	`}`
305			`if (cur_area->log)`
306			`fprintf (cur_area->log, "[%08x] -> read %08x\n", memaddr, temp);`
307	239	markom	`} else {`
308			`printf("EXCEPTION: read out of memory (32-bit access to %.8lx)\n", memaddr);`
309	525	simons	`except_handle(EXCEPT_BUSERR, cur_vadd);`
310	239	markom	`temp = 0;`
311			`}`
312			`return temp;`
313	2	cvs	`}`
314
315			`/* Returns 16-bit values from mem array. Big endian version. */`
316
317	123	markom	`unsigned short eval_mem16(unsigned long memaddr,int* breakpoint)`
318	2	cvs	`{`
319	239	markom	`unsigned short temp;`
320	525	simons	`cur_vadd = memaddr;`
321	239	markom	`memaddr = simulate_dc_mmu_load(memaddr);`
322	458	simons	`if (pending.valid)`
323			`return 0;`
324	270	markom	`if (DEBUG_ENABLED)`
325			`breakpoint += CheckDebugUnit(DebugLoadAddress,memaddr); / 28/05/01 CZ */`
326	66	lampret
327	239	markom	`temp = evalsim_mem16(memaddr);`
328	270	markom	`if (DEBUG_ENABLED)`
329			`breakpoint += CheckDebugUnit(DebugLoadData,temp); / MM170901 */`
330	239	markom	`return temp;`
331	66	lampret	`}`
332
333	221	markom	`unsigned short evalsim_mem16(unsigned long memaddr)`
334	66	lampret	`{`
335	239	markom	`unsigned short temp;`
336	221	markom
337	239	markom	`if (verify_memoryarea(memaddr)) {`
338			`switch(cur_area->granularity) {`
339			`case 1:`
340			`temp = cur_area->readfunc(memaddr) << 8;`
341			`temp \|= cur_area->readfunc(memaddr + 1);`
342			`break;`
343			`case 2:`
344			`temp = cur_area->readfunc(memaddr);`
345			`break;`
346			`case 4:`
347			`printf("EXCEPTION: read 16-bit value from 32-bit region (address 0x%08lX)\n", cur_area->granularity * 8, memaddr);`
348			`cont_run = 0;`
349			`break;`
350			`}`
351	426	markom	`if (cur_area->log)`
352			`fprintf (cur_area->log, "[%08x] -> read %08x\n", memaddr, temp);`
353	239	markom	`} else {`
354			`printf("EXCEPTION: read out of memory (16-bit access to %.8lx)\n", memaddr);`
355	525	simons	`except_handle(EXCEPT_BUSERR, cur_vadd);`
356	239	markom	`temp = 0;`
357			`}`
358			`return temp;`
359	2	cvs	`}`
360
361
362	6	lampret	`/* Returns 8-bit values from mem array. */`
363	2	cvs
364	123	markom	`unsigned char eval_mem8(unsigned long memaddr,int* breakpoint)`
365	221	markom	`{`
366	239	markom	`unsigned char temp;`
367	525	simons	`cur_vadd = memaddr;`
368	239	markom	`memaddr = simulate_dc_mmu_load(memaddr);`
369	458	simons	`if (pending.valid)`
370			`return 0;`
371	270	markom	`if (DEBUG_ENABLED)`
372			`breakpoint += CheckDebugUnit(DebugLoadAddress,memaddr); / 28/05/01 CZ */`
373	6	lampret
374	239	markom	`temp = evalsim_mem8(memaddr);`
375	270	markom	`if (DEBUG_ENABLED)`
376			`breakpoint += CheckDebugUnit(DebugLoadData,temp); / MM170901 */`
377	239	markom	`return temp;`
378	66	lampret	`}`
379
380	221	markom	`unsigned char evalsim_mem8(unsigned long memaddr)`
381			`{`
382	239	markom	`unsigned char temp;`
383	123	markom
384	239	markom	`if (verify_memoryarea(memaddr)) {`
385			`switch(cur_area->granularity) {`
386			`case 1:`
387			`temp = cur_area->readfunc(memaddr);`
388			`break;`
389			`case 2:`
390			`case 4:`
391			`printf("EXCEPTION: read 8-bit value from %u-bit region (address 0x%08lX)\n", cur_area->granularity * 8, memaddr);`
392			`cont_run = 0;`
393			`break;`
394			`}`
395	426	markom	`if (cur_area->log)`
396			`fprintf (cur_area->log, "[%08x] -> read %08x\n", memaddr, temp);`
397	239	markom	`} else {`
398			`printf("EXCEPTION: read out of memory (8-bit access to %.8lx)\n", memaddr);`
399	525	simons	`except_handle(EXCEPT_BUSERR, cur_vadd);`
400	239	markom	`temp = 0;`
401			`}`
402			`return temp;`
403	2	cvs	`}`
404
405			`/* Set mem, 32-bit. Big endian version. */`
406
407	123	markom	`void set_mem32(unsigned long memaddr, unsigned long value,int* breakpoint)`
408	2	cvs	`{`
409	525	simons	`cur_vadd = memaddr;`
410	239	markom	`memaddr = simulate_dc_mmu_store(memaddr);`
411	221	markom
412	437	simons	`/* If we produced exception don't set anything */`
413			`if (pending.valid == 1)`
414			`return;`
415
416	270	markom	`if (DEBUG_ENABLED) {`
417			`breakpoint += CheckDebugUnit(DebugStoreAddress,memaddr); / 28/05/01 CZ */`
418			`*breakpoint += CheckDebugUnit(DebugStoreData,value);`
419			`}`
420	123	markom
421	239	markom	`setsim_mem32(memaddr, value);`
422	66	lampret	`}`
423
424			`void setsim_mem32(unsigned long memaddr, unsigned long value)`
425			`{`
426	239	markom	`struct dev_memarea *dev;`
427	66	lampret
428	239	markom	`if (verify_memoryarea(memaddr)) {`
429	426	markom	`if (cur_area->log)`
430			`fprintf (cur_area->log, "[%08x] -> write %08x\n", memaddr, value);`
431	239	markom	`switch(cur_area->granularity) {`
432			`case 1:`
433	251	erez	`cur_area->writefunc(memaddr , (value >> 24) & 0xFF);`
434	239	markom	`cur_area->writefunc(memaddr + 1, (value >> 16) & 0xFF);`
435	251	erez	`cur_area->writefunc(memaddr + 2, (value >> 8) & 0xFF);`
436			`cur_area->writefunc(memaddr + 3, (value ) & 0xFF);`
437	239	markom	`break;`
438			`case 2:`
439			`cur_area->writefunc(memaddr, (value >> 16) & 0xFFFF);`
440			`cur_area->writefunc(memaddr + 2, value & 0xFFFF);`
441			`break;`
442			`case 4:`
443			`cur_area->writefunc(memaddr, value);`
444			`break;`
445	242	markom	`}`
446	239	markom	`} else {`
447			`printf("EXCEPTION: write out of memory (32-bit access to %.8lx)\n", memaddr);`
448	525	simons	`except_handle(EXCEPT_BUSERR, cur_vadd);`
449	239	markom	`}`
450	2	cvs	`}`
451
452			`/* Set mem, 16-bit. Big endian version. */`
453
454	123	markom	`void set_mem16(unsigned long memaddr, unsigned short value,int* breakpoint)`
455	2	cvs	`{`
456	525	simons	`cur_vadd = memaddr;`
457	239	markom	`memaddr = simulate_dc_mmu_store(memaddr);`
458	221	markom
459	437	simons	`/* If we produced exception don't set anything */`
460			`if (pending.valid == 1)`
461			`return;`
462
463	270	markom	`if (DEBUG_ENABLED) {`
464			`breakpoint += CheckDebugUnit(DebugStoreAddress,memaddr); / 28/05/01 CZ */`
465			`*breakpoint += CheckDebugUnit(DebugStoreData,value);`
466			`}`
467	123	markom
468	239	markom	`setsim_mem16(memaddr, value);`
469	66	lampret	`}`
470
471			`void setsim_mem16(unsigned long memaddr, unsigned short value)`
472			`{`
473	239	markom	`if (verify_memoryarea(memaddr)) {`
474	426	markom	`if (cur_area->log)`
475			`fprintf (cur_area->log, "[%08x] -> write %08x\n", memaddr, value);`
476	239	markom	`switch(cur_area->granularity) {`
477			`case 1:`
478			`cur_area->writefunc(memaddr, (value >> 8) & 0xFF);`
479			`cur_area->writefunc(memaddr + 1, value & 0xFF);`
480			`break;`
481			`case 2:`
482	251	erez	`cur_area->writefunc(memaddr, value & 0xFFFF);`
483	239	markom	`break;`
484			`case 4:`
485			`printf("EXCEPTION: write 16-bit value to 32-bit region (address 0x%08lX)\n", memaddr);`
486			`cont_run = 0;`
487			`break;`
488			`}`
489			`} else {`
490			`printf("EXCEPTION: write out of memory (16-bit access to %.8lx)\n", memaddr);`
491	525	simons	`except_handle(EXCEPT_BUSERR, cur_vadd);`
492	239	markom	`}`
493	2	cvs	`}`
494
495	6	lampret	`/* Set mem, 8-bit. */`
496	2	cvs
497	123	markom	`void set_mem8(unsigned long memaddr, unsigned char value,int* breakpoint)`
498	2	cvs	`{`
499	525	simons	`cur_vadd = memaddr;`
500	239	markom	`memaddr = simulate_dc_mmu_store(memaddr);`

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