src/include/thunks.h

/*
 *  thunks.h - Thunks to share data and code with MacOS
 *
 *  SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig
 *
 *  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 THUNKS_H
#define THUNKS_H

#include "cpu_emulation.h"

/*
 *  Native function invocation
 */

enum {
  NATIVE_PATCH_NAME_REGISTRY,
  NATIVE_VIDEO_INSTALL_ACCEL,
  NATIVE_VIDEO_VBL,
  NATIVE_VIDEO_DO_DRIVER_IO,
  NATIVE_ETHER_AO_GET_HWADDR,
  NATIVE_ETHER_AO_ADD_MULTI,
  NATIVE_ETHER_AO_DEL_MULTI,
  NATIVE_ETHER_AO_SEND_PACKET,
  NATIVE_ETHER_IRQ,
  NATIVE_ETHER_INIT,
  NATIVE_ETHER_TERM,
  NATIVE_ETHER_OPEN,
  NATIVE_ETHER_CLOSE,
  NATIVE_ETHER_WPUT,
  NATIVE_ETHER_RSRV,
  NATIVE_SERIAL_NOTHING,
  NATIVE_SERIAL_OPEN,
  NATIVE_SERIAL_PRIME_IN,
  NATIVE_SERIAL_PRIME_OUT,
  NATIVE_SERIAL_CONTROL,
  NATIVE_SERIAL_STATUS,
  NATIVE_SERIAL_CLOSE,
  NATIVE_GET_RESOURCE,
  NATIVE_GET_1_RESOURCE,
  NATIVE_GET_IND_RESOURCE,
  NATIVE_GET_1_IND_RESOURCE,
  NATIVE_R_GET_RESOURCE,
  NATIVE_MAKE_EXECUTABLE,
  NATIVE_CHECK_LOAD_INVOC,
  NATIVE_SYNC_HOOK,
  NATIVE_BITBLT_HOOK,
  NATIVE_FILLRECT_HOOK,
  NATIVE_BITBLT,
  NATIVE_INVRECT,
  NATIVE_FILLRECT,
  NATIVE_OP_MAX
};

// Initialize the thunks system
extern bool ThunksInit(void);

// Exit the thunks system
extern void ThunksExit(void);

// Return the fake PowerPC opcode to handle specified native code
#if EMULATED_PPC
extern uint32 NativeOpcode(int selector);
#endif

// Return the native function descriptor (TVECT)
extern uint32 NativeTVECT(int selector);

// Return the native function address
extern uint32 NativeFunction(int selector);

// Return the routine descriptor address of the native function
extern uint32 NativeRoutineDescriptor(int selector);


/*
 *  Helpers to share 32-bit addressable data with MacOS
 *
 *  There are two distinct allocatable regions:
 *
 *  - The Data region is used to share data between MacOS and
 *    SheepShaver. This is stack-like allocation since it is
 *    meant to only hold temporary data which dies at the end
 *    of the current function scope.
 *
 *  - The Procedure region is used to hold permanent M68K or
 *    PowerPC code to assist native routine implementations.
 *
 *  - The Procedure region grows up whereas the Data region
 *    grows down. They may intersect into the ZeroPage, which
 *    is a read-only page with all bits set to zero. In practise,
 *    the intersection is unlikely since the Procedure region is
 *    static and the Data region is meant to be small (< 256 KB).
 */

class SheepMem {
        static uint32 align(uint32 size);
protected:
        static uint32  page_size;
        static uintptr zero_page;
        static uintptr base;
        static uintptr data;
        static uintptr proc;
        static const uint32 size = 0x80000; // 512 KB
public:
        static bool Init(void);
        static void Exit(void);
        static uint32 PageSize();
        static uint32 ZeroPage();
        static uint32 Reserve(uint32 size);
        static void Release(uint32 size);
        static uint32 ReserveProc(uint32 size);
        friend class SheepVar;
};

inline uint32 SheepMem::align(uint32 size)
{
        // Align on 4 bytes boundaries
        return (size + 3) & -4;
}

inline uint32 SheepMem::PageSize()
{
  return page_size;
}

inline uint32 SheepMem::ZeroPage()
{
  return zero_page;
}

inline uint32 SheepMem::Reserve(uint32 size)
{
        data -= align(size);
        assert(data >= proc);
        return data;
}

inline void SheepMem::Release(uint32 size)
{
        data += align(size);
}

inline uint32 SheepMem::ReserveProc(uint32 size)
{
        uint32 mproc = proc;
        proc += align(size);
        assert(proc < data);
        return mproc;
}

static inline uint32 SheepProc(const uint8 *proc, uint32 proc_size)
{
        uint32 mac_proc = SheepMem::ReserveProc(proc_size);
        Host2Mac_memcpy(mac_proc, proc, proc_size);
        return mac_proc;
}

#define BUILD_SHEEPSHAVER_PROCEDURE(PROC)                                                       \
        static uint32 PROC = 0;                                                                                 \
        if (PROC == 0)                                                                                                  \
                PROC = SheepProc(PROC##_template, sizeof(PROC##_template))

class SheepVar
{
        uint32 m_base;
        uint32 m_size;
public:
        SheepVar(uint32 requested_size);
        ~SheepVar() { SheepMem::Release(m_size); }
        uint32 addr() const { return m_base; }
};

inline SheepVar::SheepVar(uint32 requested_size)
{
        m_size = SheepMem::align(requested_size);
        m_base = SheepMem::Reserve(m_size);
}

// TODO: optimize for 32-bit platforms

template< int requested_size >
struct SheepArray : public SheepVar
{
        SheepArray() : SheepVar(requested_size) { }
};

struct SheepVar32 : public SheepVar
{
        SheepVar32() : SheepVar(4) { }
        SheepVar32(uint32 value) : SheepVar(4) { set_value(value); }
        uint32 value() const { return ReadMacInt32(addr()); }
        void set_value(uint32 v) { WriteMacInt32(addr(), v); }
};

struct SheepString : public SheepVar
{
        SheepString(const char *str) : SheepVar(strlen(str) + 1)
                { if (str) strcpy(value(), str); else WriteMacInt8(addr(), 0); }
        char *value() const
                { return (char *)Mac2HostAddr(addr()); }
};

#endif
Revision:	1.13
Committed:	2005-07-03T22:02:01Z (19 years, 5 months ago) by gbeauche
Content type:	text/plain
Branch:	MAIN
Changes since 1.12:	+4 -0 lines
Log Message:	Minor tweaks to support compilation of ether.cpp within MacOS. i.e. mostly migrate the Ethernet driver to the MacOS side. This is enabled for DIRECT_ADDRESSING cases. I didn't want to alter much of ether.cpp (as it would have required to support that mode). Of course, in REAL_ADDRESSING mode (the default) and for debugging purposes, the old driver is still available.
#	Content
1	/*
2	* thunks.h - Thunks to share data and code with MacOS
3	*
4	* SheepShaver (C) 1997-2002 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_SYNC_HOOK,
61	NATIVE_BITBLT_HOOK,
62	NATIVE_FILLRECT_HOOK,
63	NATIVE_BITBLT,
64	NATIVE_INVRECT,
65	NATIVE_FILLRECT,
66	NATIVE_OP_MAX
67	};
68
69	// Initialize the thunks system
70	extern bool ThunksInit(void);
71
72	// Exit the thunks system
73	extern void ThunksExit(void);
74
75	// Return the fake PowerPC opcode to handle specified native code
76	#if EMULATED_PPC
77	extern uint32 NativeOpcode(int selector);
78	#endif
79
80	// Return the native function descriptor (TVECT)
81	extern uint32 NativeTVECT(int selector);
82
83	// Return the native function address
84	extern uint32 NativeFunction(int selector);
85
86	// Return the routine descriptor address of the native function
87	extern uint32 NativeRoutineDescriptor(int selector);
88
89
90	/*
91	* Helpers to share 32-bit addressable data with MacOS
92	*
93	* There are two distinct allocatable regions:
94	*
95	* - The Data region is used to share data between MacOS and
96	* SheepShaver. This is stack-like allocation since it is
97	* meant to only hold temporary data which dies at the end
98	* of the current function scope.
99	*
100	* - The Procedure region is used to hold permanent M68K or
101	* PowerPC code to assist native routine implementations.
102	*
103	* - The Procedure region grows up whereas the Data region
104	* grows down. They may intersect into the ZeroPage, which
105	* is a read-only page with all bits set to zero. In practise,
106	* the intersection is unlikely since the Procedure region is
107	* static and the Data region is meant to be small (< 256 KB).
108	*/
109
110	class SheepMem {
111	static uint32 align(uint32 size);
112	protected:
113	static uint32 page_size;
114	static uintptr zero_page;
115	static uintptr base;
116	static uintptr data;
117	static uintptr proc;
118	static const uint32 size = 0x80000; // 512 KB
119	public:
120	static bool Init(void);
121	static void Exit(void);
122	static uint32 PageSize();
123	static uint32 ZeroPage();
124	static uint32 Reserve(uint32 size);
125	static void Release(uint32 size);
126	static uint32 ReserveProc(uint32 size);
127	friend class SheepVar;
128	};
129
130	inline uint32 SheepMem::align(uint32 size)
131	{
132	// Align on 4 bytes boundaries
133	return (size + 3) & -4;
134	}
135
136	inline uint32 SheepMem::PageSize()
137	{
138	return page_size;
139	}
140
141	inline uint32 SheepMem::ZeroPage()
142	{
143	return zero_page;
144	}
145
146	inline uint32 SheepMem::Reserve(uint32 size)
147	{
148	data -= align(size);
149	assert(data >= proc);
150	return data;
151	}
152
153	inline void SheepMem::Release(uint32 size)
154	{
155	data += align(size);
156	}
157
158	inline uint32 SheepMem::ReserveProc(uint32 size)
159	{
160	uint32 mproc = proc;
161	proc += align(size);
162	assert(proc < data);
163	return mproc;
164	}
165
166	static inline uint32 SheepProc(const uint8 *proc, uint32 proc_size)
167	{
168	uint32 mac_proc = SheepMem::ReserveProc(proc_size);
169	Host2Mac_memcpy(mac_proc, proc, proc_size);
170	return mac_proc;
171	}
172
173	#define BUILD_SHEEPSHAVER_PROCEDURE(PROC) \
174	static uint32 PROC = 0; \
175	if (PROC == 0) \
176	PROC = SheepProc(PROC##_template, sizeof(PROC##_template))
177
178	class SheepVar
179	{
180	uint32 m_base;
181	uint32 m_size;
182	public:
183	SheepVar(uint32 requested_size);
184	~SheepVar() { SheepMem::Release(m_size); }
185	uint32 addr() const { return m_base; }
186	};
187
188	inline SheepVar::SheepVar(uint32 requested_size)
189	{
190	m_size = SheepMem::align(requested_size);
191	m_base = SheepMem::Reserve(m_size);
192	}
193
194	// TODO: optimize for 32-bit platforms
195
196	template< int requested_size >
197	struct SheepArray : public SheepVar
198	{
199	SheepArray() : SheepVar(requested_size) { }
200	};
201
202	struct SheepVar32 : public SheepVar
203	{
204	SheepVar32() : SheepVar(4) { }
205	SheepVar32(uint32 value) : SheepVar(4) { set_value(value); }
206	uint32 value() const { return ReadMacInt32(addr()); }
207	void set_value(uint32 v) { WriteMacInt32(addr(), v); }
208	};
209
210	struct SheepString : public SheepVar
211	{
212	SheepString(const char *str) : SheepVar(strlen(str) + 1)
213	{ if (str) strcpy(value(), str); else WriteMacInt8(addr(), 0); }
214	char *value() const
215	{ return (char *)Mac2HostAddr(addr()); }
216	};
217
218	#endif