1 |
|
/* |
2 |
|
* sysdeps.h - System dependent definitions for Linux |
3 |
|
* |
4 |
< |
* SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig |
4 |
> |
* SheepShaver (C) 1997-2005 Christian Bauer and Marc Hellwig |
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 |
68 |
|
|
69 |
|
// Always use Real Addressing mode on native architectures |
70 |
|
// Otherwise, use Direct Addressing mode if NATMEM_OFFSET is set |
71 |
< |
#if NATMEM_OFFSET == 0 || EMULATED_PPC == 0 |
71 |
> |
#if !defined(EMULATED_PPC) |
72 |
|
#define REAL_ADDRESSING 1 |
73 |
< |
#else |
73 |
> |
#elif defined(__CYGWIN__) |
74 |
> |
#define DIRECT_ADDRESSING 1 |
75 |
> |
#define DIRECT_ADDRESSING_HACK 1 |
76 |
> |
/* |
77 |
> |
The following address translation functions were empirically |
78 |
> |
determined on a Windows XP system running Cygwin 1.5.12-1 so |
79 |
> |
that RAM size can be maximized (up to 960 MB) and avoiding |
80 |
> |
the use of a TLB. This also takes into account reduced address |
81 |
> |
space available when the Cygwin runtime is used. |
82 |
> |
*/ |
83 |
> |
#define DIRECT_ADDRESSING_VIRT2PHYS(ADDR) \ |
84 |
> |
((ADDR) + (((ADDR) < 0x41000000) ? 0x39000000 : 0xcf800000)) |
85 |
> |
#define DIRECT_ADDRESSING_PHYS2VIRT(ADDR) \ |
86 |
> |
((ADDR) - (((ADDR) >= 0x39000000) ? 0x39000000 : 0xcf800000)) |
87 |
> |
#elif defined(NATMEM_OFFSET) |
88 |
|
#define DIRECT_ADDRESSING 1 |
89 |
+ |
#else |
90 |
+ |
#define REAL_ADDRESSING 1 |
91 |
|
#endif |
92 |
|
|
93 |
|
#define POWERPC_ROM 1 |