1.1 --- a/src/mem.c	Mon Dec 22 09:51:11 2008 +0000
     1.2 +++ b/src/mem.c	Tue Dec 23 05:48:05 2008 +0000
     1.3 @@ -51,6 +51,35 @@
     1.4  
     1.5  uint32_t num_io_rgns = 0, num_mem_rgns = 0;
     1.6  
     1.7 +DEFINE_HOOK( mem_page_remapped_hook, mem_page_remapped_hook_t );
     1.8 +static void mem_page_remapped( sh4addr_t addr, mem_region_fn_t fn )
     1.9 +{
    1.10 +    CALL_HOOKS( mem_page_remapped_hook, addr, fn );
    1.11 +}
    1.12 +
    1.13 +/********************* The "unmapped" address space ********************/
    1.14 +/* Always reads as 0, writes have no effect */
    1.15 +int32_t FASTCALL unmapped_read_long( sh4addr_t addr )
    1.16 +{
    1.17 +    return 0;
    1.18 +}
    1.19 +void FASTCALL unmapped_write_long( sh4addr_t addr, uint32_t val )
    1.20 +{
    1.21 +}
    1.22 +void FASTCALL unmapped_read_burst( unsigned char *dest, sh4addr_t addr )
    1.23 +{
    1.24 +    memset( dest, 0, 32 );
    1.25 +}
    1.26 +void FASTCALL unmapped_write_burst( sh4addr_t addr, unsigned char *src )
    1.27 +{
    1.28 +}
    1.29 +
    1.30 +struct mem_region_fn mem_region_unmapped = { 
    1.31 +        unmapped_read_long, unmapped_write_long, 
    1.32 +        unmapped_read_long, unmapped_write_long, 
    1.33 +        unmapped_read_long, unmapped_write_long, 
    1.34 +        unmapped_read_burst, unmapped_write_burst }; 
    1.35 +
    1.36  void *mem_alloc_pages( int n )
    1.37  {
    1.38      void *mem = mmap( NULL, n * 4096,
    1.39 @@ -253,6 +282,7 @@
    1.40          for( i=0; i<size>>LXDREAM_PAGE_BITS; i++ ) {
    1.41              page_map[(base>>LXDREAM_PAGE_BITS)+i] = mem + (i<<LXDREAM_PAGE_BITS);
    1.42              ext_address_space[(base>>LXDREAM_PAGE_BITS)+i] = fn;
    1.43 +            mem_page_remapped( base + (i<<LXDREAM_PAGE_BITS), fn );
    1.44          }
    1.45          base += repeat_offset;	
    1.46      } while( base <= repeat_until );
    1.47 @@ -260,6 +290,23 @@
    1.48      return &mem_rgn[num_mem_rgns-1];
    1.49  }
    1.50  
    1.51 +void register_misc_region( uint32_t base, uint32_t size, const char *name, mem_region_fn_t fn )
    1.52 +{
    1.53 +    mem_rgn[num_mem_rgns].base = base;
    1.54 +    mem_rgn[num_mem_rgns].size = size;
    1.55 +    mem_rgn[num_mem_rgns].flags = 0;
    1.56 +    mem_rgn[num_mem_rgns].name = name;
    1.57 +    mem_rgn[num_mem_rgns].mem = NULL;
    1.58 +    mem_rgn[num_mem_rgns].fn = fn;
    1.59 +    num_mem_rgns++;
    1.60 +
    1.61 +    int count = size >> 12;
    1.62 +    mem_region_fn_t *ptr = &ext_address_space[base>>12];
    1.63 +    while( count-- > 0 ) {
    1.64 +        *ptr++ = fn;
    1.65 +    }
    1.66 +}
    1.67 +
    1.68  void *mem_create_ram_region( uint32_t base, uint32_t size, const char *name, mem_region_fn_t fn )
    1.69  {
    1.70      return mem_create_repeating_ram_region( base, size, name, fn, size, base );
    1.71 @@ -351,6 +398,7 @@
    1.72      } else {
    1.73          page_map[io->base>>12] = (sh4ptr_t)(uintptr_t)num_io_rgns;
    1.74          ext_address_space[io->base>>12] = &io->fn;
    1.75 +        mem_page_remapped( io->base, &io->fn );
    1.76      }
    1.77      io_rgn[num_io_rgns] = io;
    1.78      num_io_rgns++;