/**

  * $Id: mmio.h,v 1.3 2006-01-01 08:09:17 nkeynes Exp $

  *

  * mmio.h defines a complicated batch of macros used to build up the 

  * memory-mapped I/O regions in a reasonably readable fashion.

  *

  * Copyright (c) 2005 Nathan Keynes.

  *

  * 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.

  */

 #ifndef dream_mmio_H

 #define dream_mmio_H 1

 #ifdef __cplusplus

 extern "C" {

 #if 0

 }

 #endif

 #endif

 #include <stdint.h>

 #include <stdlib.h>

 #define PAGE_TABLE_ENTRIES 128*1024

 #define PAGE_SIZE 4096

 #define PAGE_BITS 12

 #define PORT_R 1

 #define PORT_W 2

 #define PORT_MEM 4 /* store written value */

 #define PORT_RW 3

 #define PORT_MR 5

 #define PORT_MRW 7

 #define UNDEFINED 0xDEADBEEF /* This has to be a value that nothing inits to */

 struct mmio_region {

     char *id, *desc;

     uint32_t base;

     int32_t (*io_read)(uint32_t addr);

     void (*io_write)(uint32_t addr, uint32_t val);

     char *mem;

     char *save_mem; /* Used to compare for gui updates */

     struct mmio_port {

         char *id, *desc;

         int width;

         uint32_t offset;

         uint32_t def_val;

         int flags;

         uint32_t *val;

     } ports[80];

     struct mmio_port **index; /* reverse lookup by address */

     int trace_flag; /* set to 1 to enable transfer traces */

 };

 void register_io_region( struct mmio_region *mmio );

 void register_io_regions( struct mmio_region **mmiolist );

 extern struct mmio_region *io_rgn[];

 extern int num_io_rgns;

 #define MMIO_READ( id, r ) *((int32_t *)(mmio_region_##id.mem + (r)))

 #define MMIO_WRITE( id, r, v ) *((int32_t *)(mmio_region_##id.mem + (r))) = (v)

 #define MMIO_REG( id, r ) ((int32_t *)(mmio_region_##id.mem + (r)))

 #define MMIO_REGID( mid, r ) (mmio_region_##mid.index[(r)>>2] != NULL ? \

             mmio_region_##mid.index[(r)>>2]->id : "<UNDEF>" )

 #define MMIO_REGDESC( mid, r) (mmio_region_##mid.index[(r)>>2] != NULL ? \

             mmio_region_##mid.index[(r)>>2]->desc : "Undefined register" )

 #define MMIO_TRACE( mid ) mmio_region_##mid.trace_flag = 1

 #define MMIO_NOTRACE( mid ) mmio_region_##mid.trace_flag = 0

 #define MMIO_REGID_BYNUM( mid, r ) (io_rgn[mid]->index[(r)>>2] != NULL ? \

             io_rgn[mid]->index[(r)>>2]->id : "<UNDEF>" )

 #define MMIO_REGDESC_BYNUM( mid, r ) (io_rgn[mid]->index[(r)>>2] != NULL ? \

             io_rgn[mid]->index[(r)>>2]->desc : "Undefined register" )

 #define MMIO_NAME_BYNUM( mid ) (io_rgn[mid]->id)

 #ifdef __cplusplus

 }

 #endif

 #endif

 #ifdef MMIO_IMPL

 #ifndef MMIO_IMPL_INCLUDED

 #define MMIO_IMPL_INCLUDED

 #undef MMIO_REGION_BEGIN

 #undef LONG_PORT

 #undef WORD_PORT

 #undef BYTE_PORT

 #undef MMIO_REGION_END

 #undef MMIO_REGION_LIST_BEGIN

 #undef MMIO_REGION

 #undef MMIO_REGION_LIST_END

 #define MMIO_REGION_BEGIN(b,id,d) struct mmio_region mmio_region_##id = { #id, d, b, mmio_region_##id##_read, mmio_region_##id##_write, 0, 0, {

 #define LONG_PORT( o,id,f,def,d ) { #id, d, 32, o, def, f },

 #define WORD_PORT( o,id,f,def,d ) { #id, d, 16, o, def, f },

 #define BYTE_PORT( o,id,f,def,d ) { #id, d, 8, o, def, f },

 #define MMIO_REGION_END {NULL, NULL, 0, 0, 0, 0} } };

 #define MMIO_REGION_LIST_BEGIN(id) struct mmio_region *mmio_list_##id[] = {

 #define MMIO_REGION( id ) &mmio_region_##id,

 #define MMIO_REGION_LIST_END NULL};

 /* Stub defines for modules we haven't got to yet, or ones which don't

  * actually need any direct code on read and/or write

  */

 #define MMIO_REGION_READ_STUBFN( id ) \

 int32_t mmio_region_##id##_read( uint32_t reg ) { \

     int32_t val = MMIO_READ( id, reg ); \

     WARN( "Read from unimplemented module %s (%03X => %08X) [%s: %s]",\

           #id, reg, val, MMIO_REGID(id,reg), MMIO_REGDESC(id,reg) ); \

     return val; \

 }

 #define MMIO_REGION_WRITE_STUBFN( id ) \

 void mmio_region_##id##_write( uint32_t reg, uint32_t val ) { \

     WARN( "Write to unimplemented module %s (%03X <= %08X) [%s: %s]", \

           #id, reg, val, MMIO_REGID(id,reg), MMIO_REGDESC(id,reg) ); \

     MMIO_WRITE( id, reg, val ); \

 }

 #define MMIO_REGION_STUBFNS( id ) \

     MMIO_REGION_READ_STUBFN( id ) \

     MMIO_REGION_WRITE_STUBFN( id )

 #define MMIO_REGION_READ_DEFFN( id ) \

 int32_t mmio_region_##id##_read( uint32_t reg ) { \

     return MMIO_READ( id, reg ); \

 }

 #define MMIO_REGION_WRITE_DEFFN( id ) \

 void mmio_region_##id##_write( uint32_t reg, uint32_t val ) { \

     MMIO_WRITE( id, reg, val ); \

 }

 #define MMIO_REGION_DEFFNS( id ) \

     MMIO_REGION_READ_DEFFN( id ) \

     MMIO_REGION_WRITE_DEFFN( id )

 #endif

 #define MMIO_REGION_WRITE_FN( id, reg, val ) \

 void mmio_region_##id##_write( uint32_t reg, uint32_t val )

 #define MMIO_REGION_READ_FN( id, reg ) \

 int32_t mmio_region_##id##_read( uint32_t reg )

 #else

 #ifndef MMIO_IFACE_INCLUDED

 #define MMIO_IFACE_INCLUDED

 #define MMIO_REGION_BEGIN(b,id,d) \

 extern struct mmio_region mmio_region_##id; \

 int32_t mmio_region_##id##_read(uint32_t); \

 void mmio_region_##id##_write(uint32_t, uint32_t); \

 enum mmio_region_##id##_port_t {

 #define LONG_PORT( o,id,f,def,d ) id = o,

 #define WORD_PORT( o,id,f,def,d ) id = o,

 #define BYTE_PORT( o,id,f,def,d ) id = o,

 #define MMIO_REGION_END };

 #define MMIO_REGION_LIST_BEGIN(id) extern struct mmio_region *mmio_list_##id[];

 #define MMIO_REGION( id )

 #define MMIO_REGION_LIST_END

 #endif

 #endif