cff531af |
1 | /* |
2 | * PicoDrive |
3 | * (C) notaz, 2009,2010 |
4 | * |
5 | * This work is licensed under the terms of MAME license. |
6 | * See COPYING file in the top-level directory. |
7 | */ |
41397701 |
8 | #include <string.h> |
b4db550e |
9 | #include <stddef.h> |
10 | |
41397701 |
11 | #include "sh2.h" |
5686d931 |
12 | #include "../debug.h" |
679af8a3 |
13 | #include "compiler.h" |
41397701 |
14 | |
15 | #define I 0xf0 |
16 | |
f81107f5 |
17 | int sh2_init(SH2 *sh2, int is_slave, SH2 *other_sh2) |
41397701 |
18 | { |
679af8a3 |
19 | int ret = 0; |
20 | |
ed4402a7 |
21 | memset(sh2, 0, offsetof(SH2, mult_m68k_to_sh2)); |
41397701 |
22 | sh2->is_slave = is_slave; |
f81107f5 |
23 | sh2->other_sh2 = other_sh2; |
5686d931 |
24 | pdb_register_cpu(sh2, PDBCT_SH2, is_slave ? "ssh2" : "msh2"); |
679af8a3 |
25 | #ifdef DRC_SH2 |
26 | ret = sh2_drc_init(sh2); |
27 | #endif |
28 | return ret; |
41397701 |
29 | } |
30 | |
e898de13 |
31 | void sh2_finish(SH2 *sh2) |
32 | { |
33 | #ifdef DRC_SH2 |
34 | sh2_drc_finish(sh2); |
35 | #endif |
36 | } |
37 | |
41397701 |
38 | void sh2_reset(SH2 *sh2) |
39 | { |
bcf65fd6 |
40 | sh2->pc = p32x_sh2_read32(0, sh2); |
41 | sh2->r[15] = p32x_sh2_read32(4, sh2); |
41397701 |
42 | sh2->sr = I; |
43 | sh2->vbr = 0; |
44 | sh2->pending_int_irq = 0; |
45 | } |
46 | |
6add7875 |
47 | void sh2_do_irq(SH2 *sh2, int level, int vector) |
41397701 |
48 | { |
8cc76b48 |
49 | sh2->sr &= 0x3f3; |
50 | |
41397701 |
51 | sh2->r[15] -= 4; |
bcf65fd6 |
52 | p32x_sh2_write32(sh2->r[15], sh2->sr, sh2); /* push SR onto stack */ |
41397701 |
53 | sh2->r[15] -= 4; |
bcf65fd6 |
54 | p32x_sh2_write32(sh2->r[15], sh2->pc, sh2); /* push PC onto stack */ |
41397701 |
55 | |
56 | /* set I flags in SR */ |
57 | sh2->sr = (sh2->sr & ~I) | (level << 4); |
58 | |
59 | /* fetch PC */ |
bcf65fd6 |
60 | sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2); |
41397701 |
61 | |
62 | /* 13 cycles at best */ |
00faec9c |
63 | sh2->icount -= 13; |
41397701 |
64 | } |
65 | |
a8fd6e37 |
66 | int sh2_irl_irq(SH2 *sh2, int level, int nested_call) |
41397701 |
67 | { |
a8fd6e37 |
68 | int taken; |
69 | |
41397701 |
70 | sh2->pending_irl = level; |
1f1ff763 |
71 | if (level < sh2->pending_int_irq) |
72 | level = sh2->pending_int_irq; |
73 | sh2->pending_level = level; |
41397701 |
74 | |
a8fd6e37 |
75 | taken = (level > ((sh2->sr >> 4) & 0x0f)); |
76 | if (taken) { |
77 | if (!nested_call) { |
78 | // not in memhandler, so handle this now (recompiler friendly) |
79 | // do this to avoid missing irqs that other SH2 might clear |
1f1ff763 |
80 | int vector = sh2->irq_callback(sh2, level); |
81 | sh2_do_irq(sh2, level, vector); |
00faec9c |
82 | sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, 13); |
1f1ff763 |
83 | } |
a8fd6e37 |
84 | else |
85 | sh2->test_irq = 1; |
1f1ff763 |
86 | } |
a8fd6e37 |
87 | return taken; |
41397701 |
88 | } |
89 | |
90 | void sh2_internal_irq(SH2 *sh2, int level, int vector) |
91 | { |
6add7875 |
92 | // FIXME: multiple internal irqs not handled.. |
93 | // assuming internal irqs never clear until accepted |
41397701 |
94 | sh2->pending_int_irq = level; |
95 | sh2->pending_int_vector = vector; |
6add7875 |
96 | if (level > sh2->pending_level) |
97 | sh2->pending_level = level; |
41397701 |
98 | |
6add7875 |
99 | sh2->test_irq = 1; |
41397701 |
100 | } |
101 | |
b4db550e |
102 | #define SH2_REG_SIZE (offsetof(SH2, macl) + sizeof(sh2->macl)) |
103 | |
104 | void sh2_pack(const SH2 *sh2, unsigned char *buff) |
105 | { |
106 | unsigned int *p; |
107 | |
108 | memcpy(buff, sh2, SH2_REG_SIZE); |
109 | p = (void *)(buff + SH2_REG_SIZE); |
110 | |
111 | p[0] = sh2->pending_int_irq; |
112 | p[1] = sh2->pending_int_vector; |
b4db550e |
113 | } |
114 | |
115 | void sh2_unpack(SH2 *sh2, const unsigned char *buff) |
116 | { |
117 | unsigned int *p; |
118 | |
119 | memcpy(sh2, buff, SH2_REG_SIZE); |
120 | p = (void *)(buff + SH2_REG_SIZE); |
121 | |
122 | sh2->pending_int_irq = p[0]; |
123 | sh2->pending_int_vector = p[1]; |
27e26273 |
124 | sh2->test_irq = 1; |
b4db550e |
125 | } |
126 | |
00faec9c |
127 | #ifdef DRC_CMP |
128 | |
129 | /* trace/compare */ |
130 | #include <stdio.h> |
131 | #include <stdlib.h> |
132 | #include <pico/memory.h> |
6d797957 |
133 | #undef _USE_CZ80 // HACK |
134 | #include <pico/pico_int.h> |
8cc76b48 |
135 | #include <pico/debug.h> |
00faec9c |
136 | |
137 | static SH2 sh2ref[2]; |
00faec9c |
138 | static unsigned int mem_val; |
6d797957 |
139 | |
00faec9c |
140 | static unsigned int local_read32(SH2 *sh2, u32 a) |
141 | { |
142 | const sh2_memmap *sh2_map = sh2->read16_map; |
6d797957 |
143 | u16 *pd; |
00faec9c |
144 | uptr p; |
145 | |
f81107f5 |
146 | sh2_map += (a >> 25); |
00faec9c |
147 | p = sh2_map->addr; |
148 | if (!map_flag_set(p)) { |
6d797957 |
149 | pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1)); |
150 | return (pd[0] << 16) | pd[1]; |
151 | } |
152 | |
153 | if ((a & 0xfffff000) == 0xc0000000) { |
154 | // data array |
f81107f5 |
155 | pd = (u16 *)sh2->data_array + (a & 0xfff) / 2; |
6d797957 |
156 | return (pd[0] << 16) | pd[1]; |
157 | } |
158 | if ((a & 0xdfffffc0) == 0x4000) { |
159 | pd = &Pico32x.regs[(a & 0x3f) / 2]; |
160 | return (pd[0] << 16) | pd[1]; |
161 | } |
162 | if ((a & 0xdffffe00) == 0x4200) { |
163 | pd = &Pico32xMem->pal[(a & 0x1ff) / 2]; |
00faec9c |
164 | return (pd[0] << 16) | pd[1]; |
165 | } |
166 | |
167 | return 0; |
168 | } |
169 | |
00faec9c |
170 | void do_sh2_trace(SH2 *current, int cycles) |
171 | { |
6d797957 |
172 | static int current_slave = -1; |
173 | static u32 current_m68k_pc; |
00faec9c |
174 | SH2 *sh2o = &sh2ref[current->is_slave]; |
175 | u32 *regs_a = (void *)current; |
176 | u32 *regs_o = (void *)sh2o; |
177 | unsigned char v; |
178 | u32 val; |
179 | int i; |
180 | |
6d797957 |
181 | if (SekPc != current_m68k_pc) { |
182 | current_m68k_pc = SekPc; |
12da51c2 |
183 | tl_write_uint(CTL_M68KPC, current_m68k_pc); |
6d797957 |
184 | } |
185 | |
00faec9c |
186 | if (current->is_slave != current_slave) { |
187 | current_slave = current->is_slave; |
6d797957 |
188 | v = CTL_MASTERSLAVE | current->is_slave; |
12da51c2 |
189 | tl_write(&v, sizeof(v)); |
00faec9c |
190 | } |
191 | |
192 | for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) { |
193 | if (i == 17) // ppc |
194 | continue; |
195 | if (regs_a[i] != regs_o[i]) { |
12da51c2 |
196 | tl_write_uint(CTL_SH2_R + i, regs_a[i]); |
00faec9c |
197 | regs_o[i] = regs_a[i]; |
198 | } |
199 | } |
200 | |
201 | if (current->ea != sh2o->ea) { |
12da51c2 |
202 | tl_write_uint(CTL_EA, current->ea); |
00faec9c |
203 | sh2o->ea = current->ea; |
204 | } |
205 | val = local_read32(current, current->ea); |
206 | if (mem_val != val) { |
12da51c2 |
207 | tl_write_uint(CTL_EAVAL, val); |
00faec9c |
208 | mem_val = val; |
209 | } |
12da51c2 |
210 | tl_write_uint(CTL_CYCLES, cycles); |
00faec9c |
211 | } |
212 | |
213 | static const char *regnames[] = { |
214 | "r0", "r1", "r2", "r3", |
215 | "r4", "r5", "r6", "r7", |
216 | "r8", "r9", "r10", "r11", |
217 | "r12", "r13", "r14", "r15", |
218 | "pc", "ppc", "pr", "sr", |
219 | "gbr", "vbr", "mach","macl", |
220 | }; |
221 | |
6d797957 |
222 | static void dump_regs(SH2 *sh2) |
223 | { |
224 | char csh2; |
225 | int i; |
226 | |
227 | csh2 = sh2->is_slave ? 's' : 'm'; |
228 | for (i = 0; i < 16/2; i++) |
229 | printf("%csh2 r%d: %08x r%02d: %08x\n", csh2, |
230 | i, sh2->r[i], i+8, sh2->r[i+8]); |
231 | printf("%csh2 PC: %08x , %08x\n", csh2, sh2->pc, sh2->ppc); |
232 | printf("%csh2 SR: %03x PR: %08x\n", csh2, sh2->sr, sh2->pr); |
233 | } |
234 | |
00faec9c |
235 | void do_sh2_cmp(SH2 *current) |
236 | { |
237 | static int current_slave; |
238 | static u32 current_val; |
239 | SH2 *sh2o = &sh2ref[current->is_slave]; |
240 | u32 *regs_a = (void *)current; |
241 | u32 *regs_o = (void *)sh2o; |
242 | unsigned char code; |
243 | int cycles_o = 666; |
244 | u32 sr, val; |
245 | int bad = 0; |
246 | int cycles; |
247 | int i, ret; |
00faec9c |
248 | |
12da51c2 |
249 | sh2ref[1].is_slave = 1; |
00faec9c |
250 | |
251 | while (1) { |
12da51c2 |
252 | ret = tl_read(&code, 1); |
00faec9c |
253 | if (ret <= 0) |
254 | break; |
6d797957 |
255 | if (code == CTL_CYCLES) { |
12da51c2 |
256 | tl_read(&cycles_o, 4); |
00faec9c |
257 | break; |
258 | } |
259 | |
260 | switch (code) { |
6d797957 |
261 | case CTL_MASTERSLAVE: |
262 | case CTL_MASTERSLAVE + 1: |
00faec9c |
263 | current_slave = code & 1; |
264 | break; |
6d797957 |
265 | case CTL_EA: |
12da51c2 |
266 | tl_read_uint(&sh2o->ea); |
00faec9c |
267 | break; |
6d797957 |
268 | case CTL_EAVAL: |
12da51c2 |
269 | tl_read_uint(¤t_val); |
00faec9c |
270 | break; |
6d797957 |
271 | case CTL_M68KPC: |
12da51c2 |
272 | tl_read_uint(&val); |
6d797957 |
273 | if (SekPc != val) { |
274 | printf("m68k: %08x %08x\n", SekPc, val); |
275 | bad = 1; |
276 | } |
277 | break; |
00faec9c |
278 | default: |
12da51c2 |
279 | if (CTL_SH2_R <= code && code < CTL_SH2_R + |
280 | offsetof(SH2, read8_map) / 4) |
281 | { |
282 | tl_read_uint(regs_o + code - CTL_SH2_R); |
283 | } |
284 | else |
285 | { |
286 | printf("wrong code: %02x\n", code); |
00faec9c |
287 | goto end; |
288 | } |
289 | break; |
290 | } |
291 | } |
292 | |
293 | if (ret <= 0) { |
294 | printf("EOF?\n"); |
295 | goto end; |
296 | } |
297 | |
298 | if (current->is_slave != current_slave) { |
299 | printf("bad slave: %d %d\n", current->is_slave, |
300 | current_slave); |
301 | bad = 1; |
302 | } |
303 | |
304 | for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) { |
305 | if (i == 17 || i == 19) // ppc, sr |
306 | continue; |
307 | if (regs_a[i] != regs_o[i]) { |
308 | printf("bad %4s: %08x %08x\n", |
309 | regnames[i], regs_a[i], regs_o[i]); |
310 | bad = 1; |
311 | } |
312 | } |
313 | |
314 | sr = current->sr & 0x3f3; |
315 | cycles = (signed int)current->sr >> 12; |
316 | |
317 | if (sr != sh2o->sr) { |
318 | printf("bad SR: %03x %03x\n", sr, sh2o->sr); |
319 | bad = 1; |
320 | } |
321 | |
322 | if (cycles != cycles_o) { |
323 | printf("bad cycles: %d %d\n", cycles, cycles_o); |
324 | bad = 1; |
325 | } |
326 | |
327 | val = local_read32(current, sh2o->ea); |
328 | if (val != current_val) { |
329 | printf("bad val @%08x: %08x %08x\n", sh2o->ea, val, current_val); |
330 | bad = 1; |
331 | } |
332 | |
333 | if (!bad) { |
334 | sh2o->ppc = current->pc; |
335 | return; |
336 | } |
337 | |
338 | end: |
339 | printf("--\n"); |
6d797957 |
340 | dump_regs(sh2o); |
341 | if (current->is_slave != current_slave) |
342 | dump_regs(&sh2ref[current->is_slave ^ 1]); |
8cc76b48 |
343 | PDebugDumpMem(); |
00faec9c |
344 | exit(1); |
345 | } |
346 | |
347 | #endif // DRC_CMP |