| 1 |
/* |
| 2 |
* thunks.h - Thunks to share data and code with MacOS |
| 3 |
* |
| 4 |
* SheepShaver (C) 1997-2008 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 |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
*/ |
| 20 |
|
| 21 |
#ifndef THUNKS_H |
| 22 |
#define THUNKS_H |
| 23 |
|
| 24 |
#include "cpu_emulation.h" |
| 25 |
|
| 26 |
/* |
| 27 |
* Native function invocation |
| 28 |
*/ |
| 29 |
|
| 30 |
enum { |
| 31 |
NATIVE_PATCH_NAME_REGISTRY, |
| 32 |
NATIVE_VIDEO_INSTALL_ACCEL, |
| 33 |
NATIVE_VIDEO_VBL, |
| 34 |
NATIVE_VIDEO_DO_DRIVER_IO, |
| 35 |
NATIVE_ETHER_AO_GET_HWADDR, |
| 36 |
NATIVE_ETHER_AO_ADD_MULTI, |
| 37 |
NATIVE_ETHER_AO_DEL_MULTI, |
| 38 |
NATIVE_ETHER_AO_SEND_PACKET, |
| 39 |
NATIVE_ETHER_IRQ, |
| 40 |
NATIVE_ETHER_INIT, |
| 41 |
NATIVE_ETHER_TERM, |
| 42 |
NATIVE_ETHER_OPEN, |
| 43 |
NATIVE_ETHER_CLOSE, |
| 44 |
NATIVE_ETHER_WPUT, |
| 45 |
NATIVE_ETHER_RSRV, |
| 46 |
NATIVE_SERIAL_NOTHING, |
| 47 |
NATIVE_SERIAL_OPEN, |
| 48 |
NATIVE_SERIAL_PRIME_IN, |
| 49 |
NATIVE_SERIAL_PRIME_OUT, |
| 50 |
NATIVE_SERIAL_CONTROL, |
| 51 |
NATIVE_SERIAL_STATUS, |
| 52 |
NATIVE_SERIAL_CLOSE, |
| 53 |
NATIVE_GET_RESOURCE, |
| 54 |
NATIVE_GET_1_RESOURCE, |
| 55 |
NATIVE_GET_IND_RESOURCE, |
| 56 |
NATIVE_GET_1_IND_RESOURCE, |
| 57 |
NATIVE_R_GET_RESOURCE, |
| 58 |
NATIVE_MAKE_EXECUTABLE, |
| 59 |
NATIVE_CHECK_LOAD_INVOC, |
| 60 |
NATIVE_NQD_SYNC_HOOK, |
| 61 |
NATIVE_NQD_BITBLT_HOOK, |
| 62 |
NATIVE_NQD_FILLRECT_HOOK, |
| 63 |
NATIVE_NQD_UNKNOWN_HOOK, |
| 64 |
NATIVE_NQD_BITBLT, |
| 65 |
NATIVE_NQD_INVRECT, |
| 66 |
NATIVE_NQD_FILLRECT, |
| 67 |
NATIVE_NAMED_CHECK_LOAD_INVOC, |
| 68 |
NATIVE_GET_NAMED_RESOURCE, |
| 69 |
NATIVE_GET_1_NAMED_RESOURCE, |
| 70 |
NATIVE_OP_MAX |
| 71 |
}; |
| 72 |
|
| 73 |
// Initialize the thunks system |
| 74 |
extern bool ThunksInit(void); |
| 75 |
|
| 76 |
// Exit the thunks system |
| 77 |
extern void ThunksExit(void); |
| 78 |
|
| 79 |
// Return the fake PowerPC opcode to handle specified native code |
| 80 |
#if EMULATED_PPC |
| 81 |
extern uint32 NativeOpcode(int selector); |
| 82 |
#endif |
| 83 |
|
| 84 |
// Return the native function descriptor (TVECT) |
| 85 |
extern uint32 NativeTVECT(int selector); |
| 86 |
|
| 87 |
// Return the native function address |
| 88 |
extern uint32 NativeFunction(int selector); |
| 89 |
|
| 90 |
// Return the routine descriptor address of the native function |
| 91 |
extern uint32 NativeRoutineDescriptor(int selector); |
| 92 |
|
| 93 |
|
| 94 |
/* |
| 95 |
* Helpers to share 32-bit addressable data with MacOS |
| 96 |
* |
| 97 |
* There are two distinct allocatable regions: |
| 98 |
* |
| 99 |
* - The Data region is used to share data between MacOS and |
| 100 |
* SheepShaver. This is stack-like allocation since it is |
| 101 |
* meant to only hold temporary data which dies at the end |
| 102 |
* of the current function scope. |
| 103 |
* |
| 104 |
* - The Procedure region is used to hold permanent M68K or |
| 105 |
* PowerPC code to assist native routine implementations. |
| 106 |
* |
| 107 |
* - The Procedure region grows up whereas the Data region |
| 108 |
* grows down. They may intersect into the ZeroPage, which |
| 109 |
* is a read-only page with all bits set to zero. In practise, |
| 110 |
* the intersection is unlikely since the Procedure region is |
| 111 |
* static and the Data region is meant to be small (< 256 KB). |
| 112 |
*/ |
| 113 |
|
| 114 |
class SheepMem { |
| 115 |
static uint32 align(uint32 size); |
| 116 |
protected: |
| 117 |
static uint32 page_size; |
| 118 |
static uintptr zero_page; |
| 119 |
static uintptr base; |
| 120 |
static uintptr data; |
| 121 |
static uintptr proc; |
| 122 |
static const uint32 size = 0x80000; // 512 KB |
| 123 |
public: |
| 124 |
static bool Init(void); |
| 125 |
static void Exit(void); |
| 126 |
static uint32 PageSize(); |
| 127 |
static uint32 ZeroPage(); |
| 128 |
static uint32 Reserve(uint32 size); |
| 129 |
static void Release(uint32 size); |
| 130 |
static uint32 ReserveProc(uint32 size); |
| 131 |
friend class SheepVar; |
| 132 |
}; |
| 133 |
|
| 134 |
inline uint32 SheepMem::align(uint32 size) |
| 135 |
{ |
| 136 |
// Align on 4 bytes boundaries |
| 137 |
return (size + 3) & -4; |
| 138 |
} |
| 139 |
|
| 140 |
inline uint32 SheepMem::PageSize() |
| 141 |
{ |
| 142 |
return page_size; |
| 143 |
} |
| 144 |
|
| 145 |
inline uint32 SheepMem::ZeroPage() |
| 146 |
{ |
| 147 |
return zero_page; |
| 148 |
} |
| 149 |
|
| 150 |
inline uint32 SheepMem::Reserve(uint32 size) |
| 151 |
{ |
| 152 |
data -= align(size); |
| 153 |
assert(data >= proc); |
| 154 |
return data; |
| 155 |
} |
| 156 |
|
| 157 |
inline void SheepMem::Release(uint32 size) |
| 158 |
{ |
| 159 |
data += align(size); |
| 160 |
} |
| 161 |
|
| 162 |
inline uint32 SheepMem::ReserveProc(uint32 size) |
| 163 |
{ |
| 164 |
uint32 mproc = proc; |
| 165 |
proc += align(size); |
| 166 |
assert(proc < data); |
| 167 |
return mproc; |
| 168 |
} |
| 169 |
|
| 170 |
static inline uint32 SheepProc(const uint8 *proc, uint32 proc_size) |
| 171 |
{ |
| 172 |
uint32 mac_proc = SheepMem::ReserveProc(proc_size); |
| 173 |
Host2Mac_memcpy(mac_proc, proc, proc_size); |
| 174 |
return mac_proc; |
| 175 |
} |
| 176 |
|
| 177 |
#define BUILD_SHEEPSHAVER_PROCEDURE(PROC) \ |
| 178 |
static uint32 PROC = 0; \ |
| 179 |
if (PROC == 0) \ |
| 180 |
PROC = SheepProc(PROC##_template, sizeof(PROC##_template)) |
| 181 |
|
| 182 |
class SheepVar |
| 183 |
{ |
| 184 |
uint32 m_base; |
| 185 |
uint32 m_size; |
| 186 |
public: |
| 187 |
SheepVar(uint32 requested_size); |
| 188 |
~SheepVar() { SheepMem::Release(m_size); } |
| 189 |
uint32 addr() const { return m_base; } |
| 190 |
}; |
| 191 |
|
| 192 |
inline SheepVar::SheepVar(uint32 requested_size) |
| 193 |
{ |
| 194 |
m_size = SheepMem::align(requested_size); |
| 195 |
m_base = SheepMem::Reserve(m_size); |
| 196 |
} |
| 197 |
|
| 198 |
// TODO: optimize for 32-bit platforms |
| 199 |
|
| 200 |
template< int requested_size > |
| 201 |
struct SheepArray : public SheepVar |
| 202 |
{ |
| 203 |
SheepArray() : SheepVar(requested_size) { } |
| 204 |
}; |
| 205 |
|
| 206 |
struct SheepVar32 : public SheepVar |
| 207 |
{ |
| 208 |
SheepVar32() : SheepVar(4) { } |
| 209 |
SheepVar32(uint32 value) : SheepVar(4) { set_value(value); } |
| 210 |
uint32 value() const { return ReadMacInt32(addr()); } |
| 211 |
void set_value(uint32 v) { WriteMacInt32(addr(), v); } |
| 212 |
}; |
| 213 |
|
| 214 |
struct SheepString : public SheepVar |
| 215 |
{ |
| 216 |
SheepString(const char *str) : SheepVar(strlen(str) + 1) |
| 217 |
{ if (str) strcpy(value(), str); else WriteMacInt8(addr(), 0); } |
| 218 |
char *value() const |
| 219 |
{ return (char *)Mac2HostAddr(addr()); } |
| 220 |
}; |
| 221 |
|
| 222 |
#endif |
