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/*  This file is part of the program psim.

    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>

    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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

    */

#ifndef _CORE_C_

#define _CORE_C_

#include "basics.h"

#include "device_table.h"

#include "corefile.h"

typedef struct _core_mapping core_mapping;

struct _core_mapping {

  /* common */

  int level;

  int space;

  unsigned_word base;

  unsigned_word bound;

  unsigned nr_bytes;

  /* memory map */

  void *free_buffer;

  void *buffer;

  /* callback map */

  device *device;

  /* growth */

  core_mapping *next;

};

struct _core_map {

  core_mapping *first;

};

typedef enum {

  core_read_map,

  core_write_map,

  core_execute_map,

  nr_core_map_types,

} core_map_types;

struct _core {

  core_map map[nr_core_map_types];

};

INLINE_CORE\

(core *)

core_create(void)

{

  return ZALLOC(core);

}

INLINE_CORE\

(core *)

core_from_device(device *root)

{

  root = device_root(root);

  ASSERT(strcmp(device_name(root), "core") == 0);

  return device_data(root);

}

INLINE_CORE\

(void)

core_init(core *memory)

{

  core_map_types access_type;

  for (access_type = 0;

       access_type < nr_core_map_types;

       access_type++) {

    core_map *map = memory->map + access_type;

    /* blow away old mappings */

    core_mapping *curr = map->first;

    while (curr != NULL) {

      core_mapping *tbd = curr;

      curr = curr->next;

      if (tbd->free_buffer != NULL) {

        ASSERT(tbd->buffer != NULL);

        zfree(tbd->free_buffer);

      }

      zfree(tbd);

    }

    map->first = NULL;

  }

}

/* the core has three sub mappings that the more efficient

   read/write fixed quantity functions use */

INLINE_CORE\

(core_map *)

core_readable(core *memory)

{

  return memory->map + core_read_map;

}

INLINE_CORE\

(core_map *)

core_writeable(core *memory)

{

  return memory->map + core_write_map;

}

INLINE_CORE\

(core_map *)

core_executable(core *memory)

{

  return memory->map + core_execute_map;

}

STATIC_INLINE_CORE\

(core_mapping *)

new_core_mapping(attach_type attach,

                 int space,

                 unsigned_word addr,

                 unsigned nr_bytes,

                 device *device,

                 void *buffer,

                 void *free_buffer)

{

  core_mapping *new_mapping = ZALLOC(core_mapping);

  /* common */

  new_mapping->level = attach;

  new_mapping->space = space;

  new_mapping->base = addr;

  new_mapping->nr_bytes = nr_bytes;

  new_mapping->bound = addr + (nr_bytes - 1);

  if (attach == attach_raw_memory) {

    new_mapping->buffer = buffer;

    new_mapping->free_buffer = free_buffer;

  }

  else if (attach >= attach_callback) {

    new_mapping->device = device;

  }

  else {

    error("new_core_mapping() - internal error - unknown attach type %d\n",

          attach);

  }

  return new_mapping;

}

STATIC_INLINE_CORE\

(void)

core_map_attach(core_map *access_map,

                attach_type attach,

                int space,

                unsigned_word addr,

                unsigned nr_bytes, /* host limited */

                device *client, /*callback/default*/

                void *buffer, /*raw_memory*/

                void *free_buffer) /*raw_memory*/

{

  /* find the insertion point for this additional mapping and insert */

  core_mapping *next_mapping;

  core_mapping **last_mapping;

  /* actually do occasionally get a zero size map */

  if (nr_bytes == 0) {

    device_error(client, "called on core_map_attach() with size zero");

  }

  /* find the insertion point (between last/next) */

  next_mapping = access_map->first;

  last_mapping = &access_map->first;

  while(next_mapping != NULL

        && (next_mapping->level < attach

            || (next_mapping->level == attach

                && next_mapping->bound < addr))) {

    /* provided levels are the same */

    /* assert: next_mapping->base > all bases before next_mapping */

    /* assert: next_mapping->bound >= all bounds before next_mapping */

    last_mapping = &next_mapping->next;

    next_mapping = next_mapping->next;

  }

  /* check insertion point correct */

  ASSERT(next_mapping == NULL || next_mapping->level >= attach);

  if (next_mapping != NULL && next_mapping->level == attach

      && next_mapping->base < (addr + (nr_bytes - 1))) {

    device_error(client, "map overlap when attaching %d:0x%lx (%ld)",

                 space, (long)addr, (long)nr_bytes);

  }

  /* create/insert the new mapping */

  *last_mapping = new_core_mapping(attach,

                                   space, addr, nr_bytes,

                                   client, buffer, free_buffer);

  (*last_mapping)->next = next_mapping;

}

INLINE_CORE\

(void)

core_attach(core *memory,

            attach_type attach,

            int space,

            access_type access,

            unsigned_word addr,

            unsigned nr_bytes, /* host limited */

            device *client) /*callback/default*/

{

  core_map_types access_map;

  void *buffer;

  void *free_buffer;

  if (attach == attach_raw_memory) {

    /* Padd out the raw buffer to ensure that ADDR starts on a

       correctly aligned boundary */

    int padding = (addr % sizeof (unsigned64));

    free_buffer = zalloc(nr_bytes + padding);

    buffer = (char*)free_buffer + padding;

  }

  else {

    buffer = NULL;

    free_buffer = &buffer; /* marker for assertion */

  }

  for (access_map = 0;

       access_map < nr_core_map_types;

       access_map++) {

    switch (access_map) {

    case core_read_map:

      if (access & access_read)

        core_map_attach(memory->map + access_map,

                        attach,

                        space, addr, nr_bytes,

                        client, buffer, free_buffer);

      free_buffer = NULL;

      break;

    case core_write_map:

      if (access & access_write)

        core_map_attach(memory->map + access_map,

                        attach,

                        space, addr, nr_bytes,

                        client, buffer, free_buffer);

      free_buffer = NULL;

      break;

    case core_execute_map:

      if (access & access_exec)

        core_map_attach(memory->map + access_map,

                        attach,

                        space, addr, nr_bytes,

                        client, buffer, free_buffer);

      free_buffer = NULL;

      break;

    default:

      error("core_attach() internal error\n");

      break;

    }

  }

  /* allocated buffer must attach to at least one thing */

  ASSERT(free_buffer == NULL);

}

STATIC_INLINE_CORE\

(core_mapping *)

core_map_find_mapping(core_map *map,

                      unsigned_word addr,

                      unsigned nr_bytes,

                      cpu *processor,

                      unsigned_word cia,

                      int abort) /*either 0 or 1 - helps inline */

{

  core_mapping *mapping = map->first;

  ASSERT((addr & (nr_bytes - 1)) == 0); /* must be aligned */

  ASSERT((addr + (nr_bytes - 1)) >= addr); /* must not wrap */

  while (mapping != NULL) {

    if (addr >= mapping->base

        && (addr + (nr_bytes - 1)) <= mapping->bound)

      return mapping;

    mapping = mapping->next;

  }

  if (abort)

    error("core_find_mapping() - access to unmaped address, attach a default map to handle this - addr=0x%x nr_bytes=0x%x processor=0x%x cia=0x%x\n",

          addr, nr_bytes, processor, cia);

  return NULL;

}

STATIC_INLINE_CORE\

(void *)

core_translate(core_mapping *mapping,

               unsigned_word addr)

{

  return (void *)(((char *)mapping->buffer) + addr - mapping->base);

}

INLINE_CORE\

(unsigned)

core_map_read_buffer(core_map *map,

                     void *buffer,

                     unsigned_word addr,

                     unsigned len)

{

  unsigned count = 0;

  while (count < len) {

    unsigned_word raddr = addr + count;

    core_mapping *mapping =

      core_map_find_mapping(map,

                            raddr, 1,

                            NULL, /*processor*/

                            0, /*cia*/

                            0); /*dont-abort*/

    if (mapping == NULL)

      break;

    if (mapping->device != NULL) {

      int nr_bytes = len - count;

      if (raddr + nr_bytes - 1> mapping->bound)

        nr_bytes = mapping->bound - raddr + 1;

      if (device_io_read_buffer(mapping->device,

                                (unsigned_1*)buffer + count,

                                mapping->space,

                                raddr,

                                nr_bytes,

                                0, /*processor*/

        break;

      count += nr_bytes;

    }

    else {

      ((unsigned_1*)buffer)[count] =

        *(unsigned_1*)core_translate(mapping, raddr);

      count += 1;

    }

  }

  return count;

}

INLINE_CORE\

(unsigned)

core_map_write_buffer(core_map *map,

                      const void *buffer,

                      unsigned_word addr,

                      unsigned len)

{

  unsigned count = 0;

  while (count < len) {

    unsigned_word raddr = addr + count;

    core_mapping *mapping = core_map_find_mapping(map,

                                                  raddr, 1,

                                                  NULL, /*processor*/

                                                  0, /*cia*/

                                                  0); /*dont-abort*/

    if (mapping == NULL)

      break;

    if (mapping->device != NULL) {

      int nr_bytes = len - count;

      if (raddr + nr_bytes - 1 > mapping->bound)

        nr_bytes = mapping->bound - raddr + 1;

      if (device_io_write_buffer(mapping->device,

                                 (unsigned_1*)buffer + count,

                                 mapping->space,

                                 raddr,

                                 nr_bytes,

                                 0, /*processor*/

        break;

      count += nr_bytes;

    }

    else {

      *(unsigned_1*)core_translate(mapping, raddr) =

        ((unsigned_1*)buffer)[count];

      count += 1;

    }

  }

  return count;

}

/* define the read/write 1/2/4/8/word functions */

#define N 1

#include "corefile-n.h"

#undef N

#define N 2

#include "corefile-n.h"

#undef N

#define N 4

#include "corefile-n.h"

#undef N

#define N 8

#include "corefile-n.h"

#undef N

#define N word

#include "corefile-n.h"

#undef N

#endif /* _CORE_C_ */