5 * This work is licensed under the terms of MAME license.
6 * See COPYING file in the top-level directory.
8 #include "../pico_int.h"
9 #include "../sound/ym2612.h"
11 struct Pico32x Pico32x;
14 static int REGPARM(2) sh2_irq_cb(SH2 *sh2, int level)
16 if (sh2->pending_irl > sh2->pending_int_irq) {
17 elprintf(EL_32X, "%csh2 ack/irl %d @ %08x",
18 sh2->is_slave ? 's' : 'm', level, sh2->pc);
19 return 64 + sh2->pending_irl / 2;
21 elprintf(EL_32X, "%csh2 ack/int %d/%d @ %08x",
22 sh2->is_slave ? 's' : 'm', level, sh2->pending_int_vector, sh2->pc);
23 sh2->pending_int_irq = 0; // auto-clear
24 sh2->pending_level = sh2->pending_irl;
25 return sh2->pending_int_vector;
29 void p32x_update_irls(int nested_call)
31 int irqs, mlvl = 0, slvl = 0;
34 irqs = (Pico32x.sh2irqs | Pico32x.sh2irqi[0]) & ((Pico32x.sh2irq_mask[0] << 3) | P32XI_VRES);
40 irqs = (Pico32x.sh2irqs | Pico32x.sh2irqi[1]) & ((Pico32x.sh2irq_mask[1] << 3) | P32XI_VRES);
45 elprintf(EL_32X, "update_irls: m %d, s %d", mlvl, slvl);
46 sh2_irl_irq(&msh2, mlvl, nested_call);
47 sh2_irl_irq(&ssh2, slvl, nested_call);
50 p32x_poll_event(mlvl | (slvl << 1), 0);
53 void Pico32xStartup(void)
55 elprintf(EL_STATUS|EL_32X, "32X startup");
60 msh2.irq_callback = sh2_irq_cb;
62 ssh2.irq_callback = sh2_irq_cb;
67 Pico32x.vdp_regs[0] |= P32XV_nPAL;
69 PREG8(Pico32xMem->sh2_peri_regs[0], 4) =
70 PREG8(Pico32xMem->sh2_peri_regs[1], 4) = 0x84; // SCI SSR
75 #define HWSWAP(x) (((x) << 16) | ((x) >> 16))
76 void p32x_reset_sh2s(void)
78 elprintf(EL_32X, "sh2 reset");
83 // if we don't have BIOS set, perform it's work here.
85 if (p32x_bios_m == NULL) {
86 unsigned int idl_src, idl_dst, idl_size; // initial data load
90 idl_src = HWSWAP(*(unsigned int *)(Pico.rom + 0x3d4)) & ~0xf0000000;
91 idl_dst = HWSWAP(*(unsigned int *)(Pico.rom + 0x3d8)) & ~0xf0000000;
92 idl_size= HWSWAP(*(unsigned int *)(Pico.rom + 0x3dc));
93 if (idl_size > Pico.romsize || idl_src + idl_size > Pico.romsize ||
94 idl_size > 0x40000 || idl_dst + idl_size > 0x40000 || (idl_src & 3) || (idl_dst & 3)) {
95 elprintf(EL_STATUS|EL_ANOMALY, "32x: invalid initial data ptrs: %06x -> %06x, %06x",
96 idl_src, idl_dst, idl_size);
99 memcpy(Pico32xMem->sdram + idl_dst, Pico.rom + idl_src, idl_size);
102 vbr = HWSWAP(*(unsigned int *)(Pico.rom + 0x3e8));
103 sh2_set_gbr(0, 0x20004000);
107 Pico32x.regs[0x28 / 2] = *(unsigned short *)(Pico.rom + 0x18e);
108 // program will set M_OK
112 if (p32x_bios_s == NULL) {
116 vbr = HWSWAP(*(unsigned int *)(Pico.rom + 0x3ec));
117 sh2_set_gbr(1, 0x20004000);
119 // program will set S_OK
123 void Pico32xInit(void)
127 void PicoPower32x(void)
129 memset(&Pico32x, 0, sizeof(Pico32x));
131 Pico32x.regs[0] = P32XS_REN|P32XS_nRES; // verified
132 Pico32x.vdp_regs[0x0a/2] = P32XV_VBLK|P32XV_HBLK|P32XV_PEN;
133 Pico32x.sh2_regs[0] = P32XS2_ADEN;
136 void PicoUnload32x(void)
138 if (Pico32xMem != NULL)
139 plat_munmap(Pico32xMem, sizeof(*Pico32xMem));
144 PicoAHW &= ~PAHW_32X;
147 void PicoReset32x(void)
149 if (PicoAHW & PAHW_32X) {
150 Pico32x.sh2irqs |= P32XI_VRES;
152 p32x_poll_event(3, 0);
156 static void p32x_start_blank(void)
158 if (Pico32xDrawMode != PDM32X_OFF && !PicoSkipFrame) {
163 offs = 8; lines = 224;
164 if ((Pico.video.reg[1] & 8) && !(PicoOpt & POPT_ALT_RENDERER)) {
169 // XXX: no proper handling of 32col mode..
170 if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0 && // 32x not blanking
171 (Pico.video.reg[12] & 1) && // 40col mode
172 (PicoDrawMask & PDRAW_32X_ON))
174 int md_bg = Pico.video.reg[7] & 0x3f;
176 // we draw full layer (not line-by-line)
177 PicoDraw32xLayer(offs, lines, md_bg);
179 else if (Pico32xDrawMode != PDM32X_32X_ONLY)
180 PicoDraw32xLayerMdOnly(offs, lines);
186 Pico32x.vdp_regs[0x0a/2] |= P32XV_VBLK|P32XV_PEN;
188 // FB swap waits until vblank
189 if ((Pico32x.vdp_regs[0x0a/2] ^ Pico32x.pending_fb) & P32XV_FS) {
190 Pico32x.vdp_regs[0x0a/2] &= ~P32XV_FS;
191 Pico32x.vdp_regs[0x0a/2] |= Pico32x.pending_fb;
192 Pico32xSwapDRAM(Pico32x.pending_fb ^ 1);
195 Pico32x.sh2irqs |= P32XI_VINT;
197 p32x_poll_event(3, 1);
200 static __inline void run_m68k(int cyc)
204 p32x_poll_event(3, 0);
205 #if defined(EMU_C68K)
206 PicoCpuCM68k.cycles = cyc;
207 CycloneRun(&PicoCpuCM68k);
208 SekCycleCnt += cyc - PicoCpuCM68k.cycles;
209 #elif defined(EMU_M68K)
210 SekCycleCnt += m68k_execute(cyc);
211 #elif defined(EMU_F68K)
212 SekCycleCnt += fm68k_emulate(cyc+1, 0, 0);
218 // ~1463.8, but due to cache misses and slow mem
219 // it's much lower than that
220 //#define SH2_LINE_CYCLES 735
221 #define CYCLES_M68K2MSH2(x) (((x) * p32x_msh2_multiplier) >> 10)
222 #define CYCLES_M68K2SSH2(x) (((x) * p32x_ssh2_multiplier) >> 10)
225 #define CPUS_RUN_SIMPLE(m68k_cycles,s68k_cycles) \
228 SekCycleAim += m68k_cycles; \
229 while (SekCycleCnt < SekCycleAim) { \
230 slice = SekCycleCnt; \
231 run_m68k(SekCycleAim - SekCycleCnt); \
232 if (!(Pico32x.regs[0] & P32XS_nRES)) \
233 continue; /* SH2s reseting */ \
234 slice = SekCycleCnt - slice; /* real count from 68k */ \
235 if (SekCycleCnt < SekCycleAim) \
236 elprintf(EL_32X, "slice %d", slice); \
237 if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) { \
239 sh2_execute(&ssh2, CYCLES_M68K2SSH2(slice)); \
242 if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) { \
244 sh2_execute(&msh2, CYCLES_M68K2MSH2(slice)); \
247 pprof_start(dummy); \
253 #define CPUS_RUN_LOCKSTEP(m68k_cycles,s68k_cycles) \
256 for (i = 0; i <= (m68k_cycles) - STEP_68K; i += STEP_68K) { \
257 run_m68k(STEP_68K); \
258 if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) \
259 sh2_execute(&msh2, CYCLES_M68K2SH2(STEP_68K)); \
260 if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) \
261 sh2_execute(&ssh2, CYCLES_M68K2SH2(STEP_68K)); \
264 i = (m68k_cycles) - i; \
266 if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) \
267 sh2_execute(&msh2, CYCLES_M68K2SH2(i)); \
268 if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) \
269 sh2_execute(&ssh2, CYCLES_M68K2SH2(i)); \
272 #define CPUS_RUN CPUS_RUN_SIMPLE
273 //#define CPUS_RUN CPUS_RUN_LOCKSTEP
275 #include "../pico_cmn.c"
277 void PicoFrame32x(void)
279 pwm_frame_smp_cnt = 0;
281 Pico32x.vdp_regs[0x0a/2] &= ~P32XV_VBLK; // get out of vblank
282 if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0) // no forced blanking
283 Pico32x.vdp_regs[0x0a/2] &= ~P32XV_PEN; // no palette access
285 p32x_poll_event(3, 1);
289 elprintf(EL_32X, "poll: %02x", Pico32x.emu_flags);