Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / sam / devices / dummy_mods / ncu / ncu.cc

// ========== Copyright Header Begin ==========================================
// 
// OpenSPARC T2 Processor File: ncu.cc
// Copyright (c) 2006 Sun Microsystems, Inc.  All Rights Reserved.
// DO NOT ALTER OR REMOVE COPYRIGHT NOTICES.
// 
// The above named program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License version 2 as published by the Free Software Foundation.
// 
// The above named 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 work; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
// 
// ========== Copyright Header End ============================================
/* ncu.C
 * handle ncu (Memory Control Unit) T1 addresses for blaze/SAM
 *
 * Copyright (c) 2004 by Sun Microsystems, Inc.
 * All rights reserved.
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/syscall.h>	// get exec number
#include <sys/types.h>		// uid_t
#include <unistd.h>		// getuid()
#include <inttypes.h>
#include <stdarg.h>

#include <thread.h>

#include "mmi.h"
#include "ui.h"

struct sam_ncu_s {
  uint64_t startpa;
  uint64_t endpa;
}; // struct sam_ncu_s

int verbose = 0;

static int	ncu_ld_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t v9cpuid);
static int	ncu_st_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t v9cpuid);

extern "C" static void ncu_create_instance (const char *modname, const char *instance_name);

extern "C" int ncu_access(uint32_t cpuid, void* obj, uint64_t paddr, mmi_bool_t wr, uint32_t size, uint64_t* buf, uint8_t bytemask);



extern "C" void _init()
{
  if (! mmi_register_instance_creator("ncu", ncu_create_instance) ) {
    fprintf(stderr, "ERROR: SAM NCU: Cannot register ncu instance creator\n");
  }

} // _init()



void ncu_create_instance (const char *modname, const char *instance_name)
{
  struct sam_ncu_s * ncu_obj = new sam_ncu_s;

  mmi_instance_t instance = mmi_register_instance(modname, instance_name, ncu_obj, "SAM NCU model");

  ncu_obj->startpa = 0x0;
  ncu_obj->endpa = 0x0;

  // expected syntax: sysconf ncu ncu1 startpa=<0xblah> endpa=<0xblah>
  int argc = mmi_argc(instance);
  int i;

  for (i=0; i<argc; i++) {
    char * arg = strdup(mmi_argv(instance, i));
    char * marker;
    char * lv = strtok_r(arg, "=", &marker);
    if (strcmp(lv, "startpa") == 0) {
      errno = 0;
      char * rv = strtok_r(NULL, "=", &marker);
      ncu_obj->startpa = strtoull(rv, NULL, 0);
      if (errno) {
        perror("ncu: error parsing startpa");
        exit(1);
      }
    } else if (strcmp(lv, "endpa") == 0) {
      errno = 0;
      char * rv = strtok_r(NULL, "=", &marker);
      ncu_obj->endpa = strtoull(rv, NULL, 0);
      if (errno) {
        perror("ncu: error parsing startpa");
        exit(1);
      }
    } // else - do nothing
  }

  uint64_t sz = (ncu_obj->endpa - ncu_obj->startpa + 1);
  if (mmi_map_physio(ncu_obj->startpa, sz, (void *) ncu_obj, ncu_access)) { 
    fprintf(stderr, "  sam ncu: unable to register IO interceptor\n");
    return;
  }

}



int ncu_access(uint32_t cpuid, void* obj, uint64_t paddr, mmi_bool_t wr, uint32_t size, uint64_t* buf, uint8_t bytemask)
{
  if (wr) {
    return ncu_st_operation(obj, paddr, buf, size, cpuid);
  } else {
    return ncu_ld_operation(obj, paddr, buf, size, cpuid);
  }
} // ncu_access()

int ncu_ld_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t v9cpuid)
{
  if (verbose) fprintf(stderr, "ncu: ld_operation pa 0x%llx size %d cpu %d\n", paddr, size, v9cpuid);
  switch (paddr) {
  case 0x0:
    *buf = 0;
    break;
  default:
   if (verbose)  fprintf(stderr, "ncu: ld from unknown paddr 0x%llx\n", paddr);
   *buf = 0;
  }
  return 0;
} // 


int ncu_st_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t v9cpuid)
{
  if (verbose) fprintf(stderr, "ncu: st_operation pa 0x%llx size %d cpu %d\n", paddr, size, v9cpuid);
  switch (paddr) {
    break;
  default:
    if (verbose) fprintf(stderr, "ncu: st to unknown paddr 0x%llx\n", paddr);
  }
  return 0;
}  // int ncu_st_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t v9cpuid)



/////////////////////////////////////////////////

extern "C" void _fini ()
{
}

/////////////////////////////////////////////////