VRac/M6502/perl.c

#include <EXTERN.h>
#include <perl.h>
#include "M6502.h"
#include "config.h"

#if DEBUGF
#define debugf(x)  do {         \
        PerlIO_stdoutf("#> ");  \
        PerlIO_stdoutf x ;      \
} while (0)
#else
#define debugf(x)
#endif

static PerlInterpreter *my_perl;

static M6502 *R;

#if DUMP_R
#define dump_R printf("# PC: %04x A:%02x P:%02x X:%02x Y:%02x S:%02x\n", R->PC.W, R->A, R->P, R->X, R->Y, R->S );
#else
#define dump_R
#endif

void pull_R(M6502 *R) {
        R->A = SvIV( get_sv("M6502::A", FALSE) );
        R->P = SvIV( get_sv("M6502::P", FALSE) );
        R->X = SvIV( get_sv("M6502::X", FALSE) );
        R->Y = SvIV( get_sv("M6502::Y", FALSE) );
        R->S = SvIV( get_sv("M6502::S", FALSE) );
        R->PC.W = SvIV( get_sv("M6502::PC", FALSE) );
        R->IPeriod = SvIV( get_sv("M6502::IPeriod", FALSE) );
        R->IRequest = SvIV( get_sv("M6502::IRequest", FALSE) );
        R->IAutoReset = SvIV( get_sv("M6502::IAutoReset", FALSE) );
        R->TrapBadOps = SvIV( get_sv("M6502::TrapBadOps", FALSE) );
        R->Trap = SvIV( get_sv("M6502::Trap", FALSE) );
        R->Trace = SvIV( get_sv("M6502::Trace", FALSE) );
        printf("pull_R finished\n");
        dump_R;
}

void push_R(M6502 *R) {
        dSP;
        ENTER;
        SAVETMPS;
        PUSHMARK(SP);
        XPUSHs( sv_2mortal( newSViv( R->A ) ) );
        XPUSHs( sv_2mortal( newSViv( R->P ) ) );
        XPUSHs( sv_2mortal( newSViv( R->X ) ) );
        XPUSHs( sv_2mortal( newSViv( R->Y ) ) );
        XPUSHs( sv_2mortal( newSViv( R->S ) ) );
        XPUSHs( sv_2mortal( newSViv( R->PC.W ) ) );
        XPUSHs( sv_2mortal( newSViv( R->IPeriod ) ) );
        XPUSHs( sv_2mortal( newSViv( R->ICount ) ) );
        XPUSHs( sv_2mortal( newSViv( R->IRequest ) ) );
        XPUSHs( sv_2mortal( newSViv( R->IAutoReset ) ) );
        XPUSHs( sv_2mortal( newSViv( R->TrapBadOps ) ) );
        XPUSHs( sv_2mortal( newSViv( R->Trap ) ) );
        XPUSHs( sv_2mortal( newSViv( R->Trace ) ) );
        PUTBACK;
        call_pv("M6502::push_R", G_DISCARD );
        printf("push_R called\n");
        dump_R;
        FREETMPS;
        LEAVE;
}

/** Rd6502()/Wr6502/Op6502() *********************************/
/** These functions are called when access to RAM occurs.   **/
/** They allow to control memory access. Op6502 is the same **/
/** as Rd6502, but used to read *opcodes* only, when many   **/
/** checks can be skipped to make it fast. It is only       **/
/** required if there is a #define FAST_RDOP.               **/
/************************************ TO BE WRITTEN BY USER **/

byte mem(word Addr) {
        byte byte;
        int count;
        dSP;
        ENTER;
        SAVETMPS;
        PUSHMARK(SP);
        XPUSHs( sv_2mortal( newSViv( Addr ) ) );
        PUTBACK;
        count = call_pv("Arch::read", G_ARRAY );
        if ( count != 1 ) {
                printf("expect 1 return value, got %d", count);
                exit(1);
        }
        //debugf(("got %d values\n", count));
        SPAGAIN;
        SV *sv;
        sv = POPs;
        byte = SvIV(sv);
        FREETMPS;
        LEAVE;
        //debugf(("mem(%04x) = %02x\n", Addr, byte));
        return byte;
}

byte Rd6502(register word Addr) {
        byte Value;
        Value = mem(Addr);
        debugf(("Rd6502(%04x) = %02x\n", Addr, Value));
        return Value;
}

void Wr6502(register word Addr,register byte Value) {
        debugf(("Wr6502(%04x,%02x)\n", Addr, Value));
        dSP;
        ENTER;
        SAVETMPS;
        PUSHMARK(SP);
        XPUSHs( sv_2mortal( newSViv( Addr ) ) );
        XPUSHs( sv_2mortal( newSViv( Value ) ) );
        PUTBACK;
        call_pv("Arch::write", G_DISCARD );
        FREETMPS;
        LEAVE;
}

byte Op6502(register word Addr) {
        byte Op;
        Op = mem(Addr);
        debugf(("Op6502(%04x,%02x) PC:%04x\n", Addr, Op, R->PC.W));
        return Op;
}

/** Loop6502() ***********************************************/
/** 6502 emulation calls this function periodically to      **/
/** check if the system hardware requires any interrupts.   **/
/** This function must return one of following values:      **/
/** INT_NONE, INT_IRQ, INT_NMI, or INT_QUIT to exit the     **/
/** emulation loop.                                         **/
/************************************ TO BE WRITTEN BY USER **/

int hw_int = INT_NONE;

byte Loop6502(register M6502 *R) {
        debugf(("Loop6502\n"));
        dump_R;
        return hw_int;
}

/** Patch6502() **********************************************/
/** Emulation calls this function when it encounters an     **/
/** unknown opcode. This can be used to patch the code to   **/
/** emulate BIOS calls, such as disk and tape access. The   **/
/** function should return 1 if the exception was handled,  **/
/** or 0 if the opcode was truly illegal.                   **/
/************************************ TO BE WRITTEN BY USER **/
byte Patch6502(register byte Op,register M6502 *R) {
        debugf(("Patch6502(%02x)\n", Op));
        dump_R;
        hw_int = INT_QUIT;
        return 0;
}

void run_forever(void) {
        printf("entered run_forever\n");

        R = malloc(sizeof(M6502));
        if (!R) {
                printf("can't alloc %d bytes for M6502", sizeof(M6502));
                exit(1);
        }

        printf("reset CPU\n");
        Reset6502(R);

        printf("call Arch::init\n");
        dSP;
        PUSHMARK(SP);
        call_pv("Arch::init", G_DISCARD | G_NOARGS );
        FREETMPS;
        LEAVE;

        int cycles = 1;
        while ( cycles ) {
                dSP;
                PUSHMARK(SP);
                call_pv("Arch::cli", G_DISCARD | G_NOARGS );
                pull_R(R);
                FREETMPS;
                LEAVE;
                cycles = SvIV( get_sv("M6502::run_for", FALSE) );
                if ( cycles > 0 ) {
                        printf("run CPU for %d cycles\n", cycles);
                        dump_R;
                        //Run6502(R);
                        Exec6502(R, cycles);
                        dump_R;
                        push_R(R);
                        printf("end of %d cycles CPU run\n", cycles);
                } else {
                        printf("no cpu cycles set for run\n");
                        cycles = 1; // never exit, prevents segfault
                }
        }
        free(R);
}

/**
 * main code
 *
 **/

int main(int argc, char **argv) {
        char *command_line[] = {"", "-e", EMU_START };
        my_perl = perl_alloc();
        perl_construct(my_perl);
        if (perl_parse(my_perl, xs_init, 3, command_line, (char **)NULL)) {
                printf("Failed to parse initial: %s\n", EMU_START );
                return 0;
        }
        perl_run(my_perl);
        if (SvTRUE(ERRSV)) {
                printf("Failed to execute\n");
                return 0;
        } else {
                run_forever();
        }
        perl_destruct(my_perl);
        perl_free(my_perl);
        return 0;
}
1	dpavlin	24	#include <EXTERN.h>
2			#include <perl.h>
3			#include "M6502.h"
4			#include "config.h"
5
6	dpavlin	34	#if DEBUGF
7	dpavlin	33	#define debugf(x) do { \
8	dpavlin	42	PerlIO_stdoutf("#> "); \
9	dpavlin	33	PerlIO_stdoutf x ; \
10			} while (0)
11			#else
12			#define debugf(x)
13			#endif
14
15	dpavlin	24	static PerlInterpreter *my_perl;
16
17			static M6502 *R;
18
19	dpavlin	34	#if DUMP_R
20	dpavlin	26	#define dump_R printf("# PC: %04x A:%02x P:%02x X:%02x Y:%02x S:%02x\n", R->PC.W, R->A, R->P, R->X, R->Y, R->S );
21	dpavlin	33	#else
22			#define dump_R
23			#endif
24	dpavlin	25
25	dpavlin	38	void pull_R(M6502 *R) {
26	dpavlin	33	R->A = SvIV( get_sv("M6502::A", FALSE) );
27	dpavlin	34	R->P = SvIV( get_sv("M6502::P", FALSE) );
28	dpavlin	38	R->X = SvIV( get_sv("M6502::X", FALSE) );
29			R->Y = SvIV( get_sv("M6502::Y", FALSE) );
30			R->S = SvIV( get_sv("M6502::S", FALSE) );
31			R->PC.W = SvIV( get_sv("M6502::PC", FALSE) );
32			R->IPeriod = SvIV( get_sv("M6502::IPeriod", FALSE) );
33	dpavlin	74	R->IRequest = SvIV( get_sv("M6502::IRequest", FALSE) );
34			R->IAutoReset = SvIV( get_sv("M6502::IAutoReset", FALSE) );
35			R->TrapBadOps = SvIV( get_sv("M6502::TrapBadOps", FALSE) );
36			R->Trap = SvIV( get_sv("M6502::Trap", FALSE) );
37			R->Trace = SvIV( get_sv("M6502::Trace", FALSE) );
38	dpavlin	38	printf("pull_R finished\n");
39	dpavlin	25	dump_R;
40	dpavlin	24	}
41
42	dpavlin	38	void push_R(M6502 *R) {
43			dSP;
44			ENTER;
45			SAVETMPS;
46			PUSHMARK(SP);
47			XPUSHs( sv_2mortal( newSViv( R->A ) ) );
48			XPUSHs( sv_2mortal( newSViv( R->P ) ) );
49			XPUSHs( sv_2mortal( newSViv( R->X ) ) );
50			XPUSHs( sv_2mortal( newSViv( R->Y ) ) );
51			XPUSHs( sv_2mortal( newSViv( R->S ) ) );
52			XPUSHs( sv_2mortal( newSViv( R->PC.W ) ) );
53	dpavlin	74	XPUSHs( sv_2mortal( newSViv( R->IPeriod ) ) );
54			XPUSHs( sv_2mortal( newSViv( R->ICount ) ) );
55			XPUSHs( sv_2mortal( newSViv( R->IRequest ) ) );
56			XPUSHs( sv_2mortal( newSViv( R->IAutoReset ) ) );
57			XPUSHs( sv_2mortal( newSViv( R->TrapBadOps ) ) );
58			XPUSHs( sv_2mortal( newSViv( R->Trap ) ) );
59			XPUSHs( sv_2mortal( newSViv( R->Trace ) ) );
60	dpavlin	38	PUTBACK;
61	dpavlin	39	call_pv("M6502::push_R", G_DISCARD );
62	dpavlin	38	printf("push_R called\n");
63			dump_R;
64			FREETMPS;
65			LEAVE;
66			}
67
68	dpavlin	25	/ Rd6502()/Wr6502/Op6502() *******************************/
69			/ These functions are called when access to RAM occurs. /
70			/ They allow to control memory access. Op6502 is the same /
71			/** as Rd6502, but used to read opcodes only, when many **/
72			/ checks can be skipped to make it fast. It is only /
73			/ required if there is a #define FAST_RDOP. /
74			/********************************** TO BE WRITTEN BY USER /
75
76	dpavlin	28	byte mem(word Addr) {
77			byte byte;
78	dpavlin	27	int count;
79			dSP;
80			ENTER;
81			SAVETMPS;
82			PUSHMARK(SP);
83	dpavlin	28	XPUSHs( sv_2mortal( newSViv( Addr ) ) );
84	dpavlin	27	PUTBACK;
85	dpavlin	33	count = call_pv("Arch::read", G_ARRAY );
86	dpavlin	27	if ( count != 1 ) {
87			printf("expect 1 return value, got %d", count);
88			exit(1);
89			}
90	dpavlin	33	//debugf(("got %d values\n", count));
91	dpavlin	27	SPAGAIN;
92			SV *sv;
93			sv = POPs;
94	dpavlin	28	byte = SvIV(sv);
95	dpavlin	27	FREETMPS;
96			LEAVE;
97	dpavlin	34	//debugf(("mem(%04x) = %02x\n", Addr, byte));
98	dpavlin	28	return byte;
99			}
100
101			byte Rd6502(register word Addr) {
102			byte Value;
103			Value = mem(Addr);
104	dpavlin	34	debugf(("Rd6502(%04x) = %02x\n", Addr, Value));
105	dpavlin	27	return Value;
106	dpavlin	25	}
107
108			void Wr6502(register word Addr,register byte Value) {
109	dpavlin	33	debugf(("Wr6502(%04x,%02x)\n", Addr, Value));
110	dpavlin	27	dSP;
111			ENTER;
112			SAVETMPS;
113			PUSHMARK(SP);
114			XPUSHs( sv_2mortal( newSViv( Addr ) ) );
115			XPUSHs( sv_2mortal( newSViv( Value ) ) );
116			PUTBACK;
117	dpavlin	33	call_pv("Arch::write", G_DISCARD );
118	dpavlin	27	FREETMPS;
119			LEAVE;
120	dpavlin	25	}
121
122			byte Op6502(register word Addr) {
123			byte Op;
124	dpavlin	28	Op = mem(Addr);
125	dpavlin	36	debugf(("Op6502(%04x,%02x) PC:%04x\n", Addr, Op, R->PC.W));
126	dpavlin	40	return Op;
127	dpavlin	25	}
128
129			/ Loop6502() *********************************************/
130			/ 6502 emulation calls this function periodically to /
131			/ check if the system hardware requires any interrupts. /
132			/ This function must return one of following values: /
133			/ INT_NONE, INT_IRQ, INT_NMI, or INT_QUIT to exit the /
134			/ emulation loop. /
135			/********************************** TO BE WRITTEN BY USER /
136	dpavlin	42
137			int hw_int = INT_NONE;
138
139	dpavlin	25	byte Loop6502(register M6502 *R) {
140	dpavlin	33	debugf(("Loop6502\n"));
141	dpavlin	25	dump_R;
142	dpavlin	42	return hw_int;
143	dpavlin	25	}
144
145			/ Patch6502() ********************************************/
146			/ Emulation calls this function when it encounters an /
147			/ unknown opcode. This can be used to patch the code to /
148			/ emulate BIOS calls, such as disk and tape access. The /
149			/ function should return 1 if the exception was handled, /
150			/ or 0 if the opcode was truly illegal. /
151			/********************************** TO BE WRITTEN BY USER /
152			byte Patch6502(register byte Op,register M6502 *R) {
153	dpavlin	33	debugf(("Patch6502(%02x)\n", Op));
154	dpavlin	25	dump_R;
155	dpavlin	66	hw_int = INT_QUIT;
156	dpavlin	28	return 0;
157	dpavlin	25	}
158
159	dpavlin	80	void run_forever(void) {
160			printf("entered run_forever\n");
161
162			R = malloc(sizeof(M6502));
163			if (!R) {
164			printf("can't alloc %d bytes for M6502", sizeof(M6502));
165			exit(1);
166			}
167
168			printf("reset CPU\n");
169			Reset6502(R);
170
171			printf("call Arch::init\n");
172			dSP;
173			PUSHMARK(SP);
174			call_pv("Arch::init", G_DISCARD \| G_NOARGS );
175			FREETMPS;
176			LEAVE;
177
178			int cycles = 1;
179			while ( cycles ) {
180			dSP;
181			PUSHMARK(SP);
182			call_pv("Arch::cli", G_DISCARD \| G_NOARGS );
183			pull_R(R);
184			FREETMPS;
185			LEAVE;
186			cycles = SvIV( get_sv("M6502::run_for", FALSE) );
187			if ( cycles > 0 ) {
188			printf("run CPU for %d cycles\n", cycles);
189			dump_R;
190			//Run6502(R);
191			Exec6502(R, cycles);
192			dump_R;
193			push_R(R);
194			printf("end of %d cycles CPU run\n", cycles);
195			} else {
196			printf("no cpu cycles set for run\n");
197			cycles = 1; // never exit, prevents segfault
198			}
199			}
200			free(R);
201			}
202
203	dpavlin	25	/**
204			* main code
205			*
206			**/
207
208	dpavlin	24	int main(int argc, char **argv) {
209	dpavlin	30	char *command_line[] = {"", "-e", EMU_START };
210	dpavlin	24	my_perl = perl_alloc();
211			perl_construct(my_perl);
212	dpavlin	29	if (perl_parse(my_perl, xs_init, 3, command_line, (char **)NULL)) {
213	dpavlin	31	printf("Failed to parse initial: %s\n", EMU_START );
214	dpavlin	24	return 0;
215			}
216			perl_run(my_perl);
217			if (SvTRUE(ERRSV)) {
218			printf("Failed to execute\n");
219			return 0;
220			} else {
221	dpavlin	80	run_forever();
222	dpavlin	24	}
223			perl_destruct(my_perl);
224			perl_free(my_perl);
225			return 0;
226			}