| 1 |
/* |
| 2 |
* thunks.cpp - 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 |
#include "sysdeps.h" |
| 22 |
#include "thunks.h" |
| 23 |
#include "emul_op.h" |
| 24 |
#include "cpu_emulation.h" |
| 25 |
|
| 26 |
// Native function declarations |
| 27 |
#include "main.h" |
| 28 |
#include "video.h" |
| 29 |
#include "name_registry.h" |
| 30 |
#include "serial.h" |
| 31 |
#include "ether.h" |
| 32 |
|
| 33 |
|
| 34 |
/* NativeOp instruction format: |
| 35 |
+------------+--------------------------+--+----------+------------+ |
| 36 |
| 6 | |FN| OP | 2 | |
| 37 |
+------------+--------------------------+--+----------+------------+ |
| 38 |
0 5 |6 19 20 21 25 26 31 |
| 39 |
*/ |
| 40 |
|
| 41 |
#define POWERPC_NATIVE_OP(LR, OP) \ |
| 42 |
(POWERPC_EMUL_OP | ((LR) << 11) | (((uint32)OP) << 6) | 2) |
| 43 |
|
| 44 |
// Return the fake PowerPC opcode to handle specified native code |
| 45 |
#if EMULATED_PPC |
| 46 |
uint32 NativeOpcode(int selector) |
| 47 |
{ |
| 48 |
uint32 opcode; |
| 49 |
switch (selector) { |
| 50 |
case NATIVE_DISABLE_INTERRUPT: |
| 51 |
case NATIVE_ENABLE_INTERRUPT: |
| 52 |
opcode = POWERPC_NATIVE_OP(0, selector); |
| 53 |
break; |
| 54 |
case NATIVE_PATCH_NAME_REGISTRY: |
| 55 |
case NATIVE_VIDEO_INSTALL_ACCEL: |
| 56 |
case NATIVE_VIDEO_VBL: |
| 57 |
case NATIVE_VIDEO_DO_DRIVER_IO: |
| 58 |
case NATIVE_ETHER_IRQ: |
| 59 |
case NATIVE_ETHER_INIT: |
| 60 |
case NATIVE_ETHER_TERM: |
| 61 |
case NATIVE_ETHER_OPEN: |
| 62 |
case NATIVE_ETHER_CLOSE: |
| 63 |
case NATIVE_ETHER_WPUT: |
| 64 |
case NATIVE_ETHER_RSRV: |
| 65 |
case NATIVE_SERIAL_NOTHING: |
| 66 |
case NATIVE_SERIAL_OPEN: |
| 67 |
case NATIVE_SERIAL_PRIME_IN: |
| 68 |
case NATIVE_SERIAL_PRIME_OUT: |
| 69 |
case NATIVE_SERIAL_CONTROL: |
| 70 |
case NATIVE_SERIAL_STATUS: |
| 71 |
case NATIVE_SERIAL_CLOSE: |
| 72 |
case NATIVE_GET_RESOURCE: |
| 73 |
case NATIVE_GET_1_RESOURCE: |
| 74 |
case NATIVE_GET_IND_RESOURCE: |
| 75 |
case NATIVE_GET_1_IND_RESOURCE: |
| 76 |
case NATIVE_R_GET_RESOURCE: |
| 77 |
case NATIVE_MAKE_EXECUTABLE: |
| 78 |
opcode = POWERPC_NATIVE_OP(1, selector); |
| 79 |
break; |
| 80 |
default: |
| 81 |
abort(); |
| 82 |
} |
| 83 |
return opcode; |
| 84 |
} |
| 85 |
#endif |
| 86 |
|
| 87 |
// NativeOp -> { TVECT, function base } mappings |
| 88 |
struct native_op_t { |
| 89 |
uint32 tvect; |
| 90 |
uint32 func; |
| 91 |
}; |
| 92 |
static native_op_t native_op[NATIVE_OP_MAX]; |
| 93 |
|
| 94 |
// Initialize the thunks system |
| 95 |
bool ThunksInit(void) |
| 96 |
{ |
| 97 |
#if EMULATED_PPC |
| 98 |
for (int i = 0; i < NATIVE_OP_MAX; i++) { |
| 99 |
uintptr base = SheepMem::Reserve(12); |
| 100 |
WriteMacInt32(base + 0, base + 8); |
| 101 |
WriteMacInt32(base + 4, 0); // Fake TVECT |
| 102 |
WriteMacInt32(base + 8, NativeOpcode(i)); |
| 103 |
native_op[i].tvect = base; |
| 104 |
native_op[i].func = base + 8; |
| 105 |
} |
| 106 |
#else |
| 107 |
#if defined(__linux__) |
| 108 |
#define DEFINE_NATIVE_OP(ID, FUNC) do { \ |
| 109 |
uintptr base = SheepMem::Reserve(8); \ |
| 110 |
WriteMacInt32(base + 0, (uint32)FUNC); \ |
| 111 |
WriteMacInt32(base + 4, 0); /*Fake TVECT*/ \ |
| 112 |
native_op[ID].tvect = base; \ |
| 113 |
native_op[ID].func = (uint32)FUNC; \ |
| 114 |
} while (0) |
| 115 |
#elif defined(__BEOS__) |
| 116 |
#define DEFINE_NATIVE_OP(ID, FUNC) do { \ |
| 117 |
native_op[ID].tvect = FUNC; \ |
| 118 |
native_op[ID].func = ((uint32 *)FUNC)[0]; \ |
| 119 |
} while (0) |
| 120 |
#else |
| 121 |
#error "FIXME: define NativeOp for your platform" |
| 122 |
#endif |
| 123 |
DEFINE_NATIVE_OP(NATIVE_SERIAL_NOTHING, SerialNothing); |
| 124 |
DEFINE_NATIVE_OP(NATIVE_SERIAL_OPEN, SerialOpen); |
| 125 |
DEFINE_NATIVE_OP(NATIVE_SERIAL_PRIME_IN, SerialPrimeIn); |
| 126 |
DEFINE_NATIVE_OP(NATIVE_SERIAL_PRIME_OUT, SerialPrimeOut); |
| 127 |
DEFINE_NATIVE_OP(NATIVE_SERIAL_CONTROL, SerialControl); |
| 128 |
DEFINE_NATIVE_OP(NATIVE_SERIAL_STATUS, SerialStatus); |
| 129 |
DEFINE_NATIVE_OP(NATIVE_SERIAL_CLOSE, SerialClose); |
| 130 |
DEFINE_NATIVE_OP(NATIVE_MAKE_EXECUTABLE, MakeExecutable); |
| 131 |
#undef DEFINE_NATIVE_OP |
| 132 |
#endif |
| 133 |
return true; |
| 134 |
} |
| 135 |
|
| 136 |
// Return the native function descriptor (TVECT) |
| 137 |
uint32 NativeTVECT(int selector) |
| 138 |
{ |
| 139 |
assert(selector < NATIVE_OP_MAX); |
| 140 |
const uint32 tvect = native_op[selector].tvect; |
| 141 |
assert(tvect != 0); |
| 142 |
return native_op[selector].tvect; |
| 143 |
} |
| 144 |
|
| 145 |
// Return the native function address |
| 146 |
uint32 NativeFunction(int selector) |
| 147 |
{ |
| 148 |
assert(selector < NATIVE_OP_MAX); |
| 149 |
const uint32 func = native_op[selector].func; |
| 150 |
assert(func != 0); |
| 151 |
return native_op[selector].func; |
| 152 |
} |
