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root/cebix/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
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Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.43 by gbeauche, 2004-05-31T10:08:31Z vs.
Revision 1.59 by gbeauche, 2005-03-05T18:33:30Z

# Line 1 | Line 1
1   /*
2   *  sheepshaver_glue.cpp - Glue Kheperix CPU to SheepShaver CPU engine interface
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
# Line 42 | Line 42
42  
43   #include <stdio.h>
44   #include <stdlib.h>
45 + #ifdef HAVE_MALLOC_H
46 + #include <malloc.h>
47 + #endif
48 +
49 + #ifdef USE_SDL_VIDEO
50 + #include <SDL_events.h>
51 + #endif
52  
53   #if ENABLE_MON
54   #include "mon.h"
# Line 52 | Line 59
59   #include "debug.h"
60  
61   // Emulation time statistics
62 < #define EMUL_TIME_STATS 1
62 > #ifndef EMUL_TIME_STATS
63 > #define EMUL_TIME_STATS 0
64 > #endif
65  
66   #if EMUL_TIME_STATS
67   static clock_t emul_start_time;
68 < static uint32 interrupt_count = 0;
68 > static uint32 interrupt_count = 0, ppc_interrupt_count = 0;
69   static clock_t interrupt_time = 0;
70   static uint32 exec68k_count = 0;
71   static clock_t exec68k_time = 0;
# Line 84 | Line 93 | extern "C" void check_load_invoc(uint32
93   // PowerPC EmulOp to exit from emulation looop
94   const uint32 POWERPC_EXEC_RETURN = POWERPC_EMUL_OP | 1;
95  
87 // Enable interrupt routine safety checks?
88 #define SAFE_INTERRUPT_PPC 1
89
96   // Enable Execute68k() safety checks?
97   #define SAFE_EXEC_68K 1
98  
# Line 99 | Line 105 | const uint32 POWERPC_EXEC_RETURN = POWER
105   // Interrupts in native mode?
106   #define INTERRUPTS_IN_NATIVE_MODE 1
107  
102 // Enable native EMUL_OPs to be run without a mode switch
103 #define ENABLE_NATIVE_EMUL_OP 1
104
108   // Pointer to Kernel Data
109 < static KernelData * const kernel_data = (KernelData *)KERNEL_DATA_BASE;
109 > static KernelData * kernel_data;
110  
111   // SIGSEGV handler
112 < static sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
112 > sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
113  
114   #if PPC_ENABLE_JIT && PPC_REENTRANT_JIT
115   // Special trampolines for EmulOp and NativeOp
# Line 136 | Line 139 | class sheepshaver_cpu
139          void init_decoder();
140          void execute_sheep(uint32 opcode);
141  
139        // Filter out EMUL_OP routines that only call native code
140        bool filter_execute_emul_op(uint32 emul_op);
141
142        // "Native" EMUL_OP routines
143        void execute_emul_op_microseconds();
144        void execute_emul_op_idle_time_1();
145        void execute_emul_op_idle_time_2();
146
147        // CPU context to preserve on interrupt
148        class interrupt_context {
149                uint32 gpr[32];
150                uint32 pc;
151                uint32 lr;
152                uint32 ctr;
153                uint32 cr;
154                uint32 xer;
155                sheepshaver_cpu *cpu;
156                const char *where;
157        public:
158                interrupt_context(sheepshaver_cpu *_cpu, const char *_where);
159                ~interrupt_context();
160        };
161
142   public:
143  
144          // Constructor
# Line 185 | Line 165 | public:
165          // Execute MacOS/PPC code
166          uint32 execute_macos_code(uint32 tvect, int nargs, uint32 const *args);
167  
168 + #if PPC_ENABLE_JIT
169          // Compile one instruction
170          virtual int compile1(codegen_context_t & cg_context);
171 <
171 > #endif
172          // Resource manager thunk
173          void get_resource(uint32 old_get_resource);
174  
175          // Handle MacOS interrupt
176          void interrupt(uint32 entry);
196        void handle_interrupt();
177  
178          // Make sure the SIGSEGV handler can access CPU registers
179          friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
180 +
181 +        // Memory allocator returning areas aligned on 16-byte boundaries
182 +        void *operator new(size_t size);
183 +        void operator delete(void *p);
184   };
185  
186   // Memory allocator returning areas aligned on 16-byte boundaries
187 < void *operator new(size_t size)
187 > void *sheepshaver_cpu::operator new(size_t size)
188   {
189          void *p;
190  
# Line 219 | Line 203 | void *operator new(size_t size)
203          return p;
204   }
205  
206 < void operator delete(void *p)
206 > void sheepshaver_cpu::operator delete(void *p)
207   {
208   #if defined(HAVE_MEMALIGN) || defined(HAVE_VALLOC)
209   #if defined(__GLIBC__)
# Line 268 | Line 252 | typedef bit_field< 19, 19 > FN_field;
252   typedef bit_field< 20, 25 > NATIVE_OP_field;
253   typedef bit_field< 26, 31 > EMUL_OP_field;
254  
271 // "Native" EMUL_OP routines
272 #define GPR_A(REG) gpr(16 + (REG))
273 #define GPR_D(REG) gpr( 8 + (REG))
274
275 void sheepshaver_cpu::execute_emul_op_microseconds()
276 {
277        Microseconds(GPR_A(0), GPR_D(0));
278 }
279
280 void sheepshaver_cpu::execute_emul_op_idle_time_1()
281 {
282        // Sleep if no events pending
283        if (ReadMacInt32(0x14c) == 0)
284                Delay_usec(16667);
285        GPR_A(0) = ReadMacInt32(0x2b6);
286 }
287
288 void sheepshaver_cpu::execute_emul_op_idle_time_2()
289 {
290        // Sleep if no events pending
291        if (ReadMacInt32(0x14c) == 0)
292                Delay_usec(16667);
293        GPR_D(0) = (uint32)-2;
294 }
295
296 // Filter out EMUL_OP routines that only call native code
297 bool sheepshaver_cpu::filter_execute_emul_op(uint32 emul_op)
298 {
299        switch (emul_op) {
300        case OP_MICROSECONDS:
301                execute_emul_op_microseconds();
302                return true;
303        case OP_IDLE_TIME:
304                execute_emul_op_idle_time_1();
305                return true;
306        case OP_IDLE_TIME_2:
307                execute_emul_op_idle_time_2();
308                return true;
309        }
310        return false;
311 }
312
255   // Execute EMUL_OP routine
256   void sheepshaver_cpu::execute_emul_op(uint32 emul_op)
257   {
316 #if ENABLE_NATIVE_EMUL_OP
317        // First, filter out EMUL_OPs that can be executed without a mode switch
318        if (filter_execute_emul_op(emul_op))
319                return;
320 #endif
321
258          M68kRegisters r68;
259          WriteMacInt32(XLM_68K_R25, gpr(25));
260          WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
# Line 371 | Line 307 | void sheepshaver_cpu::execute_sheep(uint
307   }
308  
309   // Compile one instruction
310 + #if PPC_ENABLE_JIT
311   int sheepshaver_cpu::compile1(codegen_context_t & cg_context)
312   {
376 #if PPC_ENABLE_JIT
313          const instr_info_t *ii = cg_context.instr_info;
314          if (ii->mnemo != PPC_I(SHEEP))
315                  return COMPILE_FAILURE;
# Line 444 | Line 380 | int sheepshaver_cpu::compile1(codegen_co
380                          status = COMPILE_CODE_OK;
381                          break;
382   #endif
447                case NATIVE_DISABLE_INTERRUPT:
448                        dg.gen_invoke(DisableInterrupt);
449                        status = COMPILE_CODE_OK;
450                        break;
451                case NATIVE_ENABLE_INTERRUPT:
452                        dg.gen_invoke(EnableInterrupt);
453                        status = COMPILE_CODE_OK;
454                        break;
383                  case NATIVE_BITBLT:
384                          dg.gen_load_T0_GPR(3);
385                          dg.gen_invoke_T0((void (*)(uint32))NQD_bitblt);
# Line 508 | Line 436 | int sheepshaver_cpu::compile1(codegen_co
436  
437          default: {      // EMUL_OP
438                  uint32 emul_op = EMUL_OP_field::extract(opcode) - 3;
511 #if ENABLE_NATIVE_EMUL_OP
512                typedef void (*emul_op_func_t)(dyngen_cpu_base);
513                emul_op_func_t emul_op_func = 0;
514                switch (emul_op) {
515                case OP_MICROSECONDS:
516                        emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_microseconds).ptr();
517                        break;
518                case OP_IDLE_TIME:
519                        emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_idle_time_1).ptr();
520                        break;
521                case OP_IDLE_TIME_2:
522                        emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_idle_time_2).ptr();
523                        break;
524                }
525                if (emul_op_func) {
526                        dg.gen_invoke_CPU(emul_op_func);
527                        cg_context.done_compile = false;
528                        status = COMPILE_CODE_OK;
529                        break;
530                }
531 #endif
439   #if PPC_REENTRANT_JIT
440                  // Try to execute EmulOp trampoline
441                  dg.gen_set_PC_im(cg_context.pc + 4);
# Line 548 | Line 455 | int sheepshaver_cpu::compile1(codegen_co
455          }
456          }
457          return status;
551 #endif
552        return COMPILE_FAILURE;
553 }
554
555 // CPU context to preserve on interrupt
556 sheepshaver_cpu::interrupt_context::interrupt_context(sheepshaver_cpu *_cpu, const char *_where)
557 {
558 #if SAFE_INTERRUPT_PPC >= 2
559        cpu = _cpu;
560        where = _where;
561
562        // Save interrupt context
563        memcpy(&gpr[0], &cpu->gpr(0), sizeof(gpr));
564        pc = cpu->pc();
565        lr = cpu->lr();
566        ctr = cpu->ctr();
567        cr = cpu->get_cr();
568        xer = cpu->get_xer();
569 #endif
458   }
571
572 sheepshaver_cpu::interrupt_context::~interrupt_context()
573 {
574 #if SAFE_INTERRUPT_PPC >= 2
575        // Check whether CPU context was preserved by interrupt
576        if (memcmp(&gpr[0], &cpu->gpr(0), sizeof(gpr)) != 0) {
577                printf("FATAL: %s: interrupt clobbers registers\n", where);
578                for (int i = 0; i < 32; i++)
579                        if (gpr[i] != cpu->gpr(i))
580                                printf(" r%d: %08x -> %08x\n", i, gpr[i], cpu->gpr(i));
581        }
582        if (pc != cpu->pc())
583                printf("FATAL: %s: interrupt clobbers PC\n", where);
584        if (lr != cpu->lr())
585                printf("FATAL: %s: interrupt clobbers LR\n", where);
586        if (ctr != cpu->ctr())
587                printf("FATAL: %s: interrupt clobbers CTR\n", where);
588        if (cr != cpu->get_cr())
589                printf("FATAL: %s: interrupt clobbers CR\n", where);
590        if (xer != cpu->get_xer())
591                printf("FATAL: %s: interrupt clobbers XER\n", where);
459   #endif
593 }
460  
461   // Handle MacOS interrupt
462   void sheepshaver_cpu::interrupt(uint32 entry)
463   {
464   #if EMUL_TIME_STATS
465 <        interrupt_count++;
465 >        ppc_interrupt_count++;
466          const clock_t interrupt_start = clock();
467   #endif
468  
603 #if SAFE_INTERRUPT_PPC
604        static int depth = 0;
605        if (depth != 0)
606                printf("FATAL: sheepshaver_cpu::interrupt() called more than once: %d\n", depth);
607        depth++;
608 #endif
609
469          // Save program counters and branch registers
470          uint32 saved_pc = pc();
471          uint32 saved_lr = lr();
# Line 660 | Line 519 | void sheepshaver_cpu::interrupt(uint32 e
519   #if EMUL_TIME_STATS
520          interrupt_time += (clock() - interrupt_start);
521   #endif
663
664 #if SAFE_INTERRUPT_PPC
665        depth--;
666 #endif
522   }
523  
524   // Execute 68k routine
# Line 882 | Line 737 | static void dump_log(void)
737   *  Initialize CPU emulation
738   */
739  
740 < static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
740 > sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
741   {
742   #if ENABLE_VOSF
743          // Handle screen fault
# Line 894 | Line 749 | static sigsegv_return_t sigsegv_handler(
749          const uintptr addr = (uintptr)fault_address;
750   #if HAVE_SIGSEGV_SKIP_INSTRUCTION
751          // Ignore writes to ROM
752 <        if ((addr - ROM_BASE) < ROM_SIZE)
752 >        if ((addr - (uintptr)ROMBaseHost) < ROM_SIZE)
753                  return SIGSEGV_RETURN_SKIP_INSTRUCTION;
754  
755          // Get program counter of target CPU
# Line 954 | Line 809 | static sigsegv_return_t sigsegv_handler(
809  
810   void init_emul_ppc(void)
811   {
812 +        // Get pointer to KernelData in host address space
813 +        kernel_data = (KernelData *)Mac2HostAddr(KERNEL_DATA_BASE);
814 +
815          // Initialize main CPU emulator
816          ppc_cpu = new sheepshaver_cpu();
817          ppc_cpu->set_register(powerpc_registers::GPR(3), any_register((uint32)ROM_BASE + 0x30d000));
818          ppc_cpu->set_register(powerpc_registers::GPR(4), any_register(KernelDataAddr + 0x1000));
819          WriteMacInt32(XLM_RUN_MODE, MODE_68K);
820  
963        // Install the handler for SIGSEGV
964        sigsegv_install_handler(sigsegv_handler);
965
821   #if ENABLE_MON
822          // Install "regs" command in cxmon
823          mon_add_command("regs", dump_registers, "regs                     Dump PowerPC registers\n");
# Line 988 | Line 843 | void exit_emul_ppc(void)
843          printf("Total emulation time : %.1f sec\n", double(emul_time) / double(CLOCKS_PER_SEC));
844          printf("Total interrupt count: %d (%2.1f Hz)\n", interrupt_count,
845                     (double(interrupt_count) * CLOCKS_PER_SEC) / double(emul_time));
846 +        printf("Total ppc interrupt count: %d (%2.1f %%)\n", ppc_interrupt_count,
847 +                   (double(ppc_interrupt_count) * 100.0) / double(interrupt_count));
848  
849   #define PRINT_STATS(LABEL, VAR_PREFIX) do {                                                             \
850                  printf("Total " LABEL " count : %d\n", VAR_PREFIX##_count);             \
# Line 1061 | Line 918 | void TriggerInterrupt(void)
918   #endif
919   }
920  
921 < void sheepshaver_cpu::handle_interrupt(void)
921 > void HandleInterrupt(powerpc_registers *r)
922   {
923 + #ifdef USE_SDL_VIDEO
924 +        // We must fill in the events queue in the same thread that did call SDL_SetVideoMode()
925 +        SDL_PumpEvents();
926 + #endif
927 +
928          // Do nothing if interrupts are disabled
929 <        if (*(int32 *)XLM_IRQ_NEST > 0)
929 >        if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
930                  return;
931  
932 <        // Do nothing if there is no interrupt pending
932 >        // Do nothing if there is no pending interrupt
933          if (InterruptFlags == 0)
934                  return;
935  
936          // Current interrupt nest level
937          static int interrupt_depth = 0;
938          ++interrupt_depth;
939 <
940 <        // Disable MacOS stack sniffer
941 <        WriteMacInt32(0x110, 0);
939 > #if EMUL_TIME_STATS
940 >        interrupt_count++;
941 > #endif
942  
943          // Interrupt action depends on current run mode
944          switch (ReadMacInt32(XLM_RUN_MODE)) {
945          case MODE_68K:
946                  // 68k emulator active, trigger 68k interrupt level 1
947                  WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
948 <                set_cr(get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
948 >                r->cr.set(r->cr.get() | tswap32(kernel_data->v[0x674 >> 2]));
949                  break;
950      
951   #if INTERRUPTS_IN_NATIVE_MODE
952          case MODE_NATIVE:
953                  // 68k emulator inactive, in nanokernel?
954 <                if (gpr(1) != KernelDataAddr && interrupt_depth == 1) {
1093 <                        interrupt_context ctx(this, "PowerPC mode");
954 >                if (r->gpr[1] != KernelDataAddr && interrupt_depth == 1) {
955  
956                          // Prepare for 68k interrupt level 1
957                          WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
# Line 1112 | Line 973 | void sheepshaver_cpu::handle_interrupt(v
973          case MODE_EMUL_OP:
974                  // 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0
975                  if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
976 <                        interrupt_context ctx(this, "68k mode");
976 > #if EMUL_TIME_STATS
977 >                        const clock_t interrupt_start = clock();
978 > #endif
979   #if 1
980                          // Execute full 68k interrupt routine
981                          M68kRegisters r;
982                          uint32 old_r25 = ReadMacInt32(XLM_68K_R25);     // Save interrupt level
983                          WriteMacInt32(XLM_68K_R25, 0x21);                       // Execute with interrupt level 1
984 <                        static const uint8 proc[] = {
984 >                        static const uint8 proc_template[] = {
985                                  0x3f, 0x3c, 0x00, 0x00,                 // move.w       #$0000,-(sp)    (fake format word)
986                                  0x48, 0x7a, 0x00, 0x0a,                 // pea          @1(pc)                  (return address)
987                                  0x40, 0xe7,                                             // move         sr,-(sp)                (saved SR)
# Line 1126 | Line 989 | void sheepshaver_cpu::handle_interrupt(v
989                                  0x4e, 0xd0,                                             // jmp          (a0)
990                                  M68K_RTS >> 8, M68K_RTS & 0xff  // @1
991                          };
992 <                        Execute68k((uint32)proc, &r);
992 >                        BUILD_SHEEPSHAVER_PROCEDURE(proc);
993 >                        Execute68k(proc, &r);
994                          WriteMacInt32(XLM_68K_R25, old_r25);            // Restore interrupt level
995   #else
996                          // Only update cursor
# Line 1138 | Line 1002 | void sheepshaver_cpu::handle_interrupt(v
1002                                  }
1003                          }
1004   #endif
1005 + #if EMUL_TIME_STATS
1006 +                        interrupt_time += (clock() - interrupt_start);
1007 + #endif
1008                  }
1009                  break;
1010   #endif
# Line 1172 | Line 1039 | void sheepshaver_cpu::execute_native_op(
1039                  VideoVBL();
1040                  break;
1041          case NATIVE_VIDEO_DO_DRIVER_IO:
1042 <                gpr(3) = (int32)(int16)VideoDoDriverIO((void *)gpr(3), (void *)gpr(4),
1176 <                                                                                           (void *)gpr(5), gpr(6), gpr(7));
1042 >                gpr(3) = (int32)(int16)VideoDoDriverIO(gpr(3), gpr(4), gpr(5), gpr(6), gpr(7));
1043                  break;
1178 #ifdef WORDS_BIGENDIAN
1044          case NATIVE_ETHER_IRQ:
1045                  EtherIRQ();
1046                  break;
# Line 1197 | Line 1062 | void sheepshaver_cpu::execute_native_op(
1062          case NATIVE_ETHER_RSRV:
1063                  gpr(3) = ether_rsrv((queue_t *)gpr(3));
1064                  break;
1200 #else
1201        case NATIVE_ETHER_INIT:
1202                // FIXME: needs more complicated thunks
1203                gpr(3) = false;
1204                break;
1205 #endif
1065          case NATIVE_SYNC_HOOK:
1066                  gpr(3) = NQD_sync_hook(gpr(3));
1067                  break;
# Line 1257 | Line 1116 | void sheepshaver_cpu::execute_native_op(
1116                  get_resource_callbacks[selector - NATIVE_GET_RESOURCE]();
1117                  break;
1118          }
1260        case NATIVE_DISABLE_INTERRUPT:
1261                DisableInterrupt();
1262                break;
1263        case NATIVE_ENABLE_INTERRUPT:
1264                EnableInterrupt();
1265                break;
1119          case NATIVE_MAKE_EXECUTABLE:
1120 <                MakeExecutable(0, (void *)gpr(4), gpr(5));
1120 >                MakeExecutable(0, gpr(4), gpr(5));
1121                  break;
1122          case NATIVE_CHECK_LOAD_INVOC:
1123                  check_load_invoc(gpr(3), gpr(4), gpr(5));

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