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
77 #define HWSWAP(x) (((x) << 16) | ((x) >> 16))
78 void p32x_reset_sh2s(void)
80 elprintf(EL_32X, "sh2 reset");
85 // if we don't have BIOS set, perform it's work here.
87 if (p32x_bios_m == NULL) {
88 unsigned int idl_src, idl_dst, idl_size; // initial data load
92 idl_src = HWSWAP(*(unsigned int *)(Pico.rom + 0x3d4)) & ~0xf0000000;
93 idl_dst = HWSWAP(*(unsigned int *)(Pico.rom + 0x3d8)) & ~0xf0000000;
94 idl_size= HWSWAP(*(unsigned int *)(Pico.rom + 0x3dc));
95 if (idl_size > Pico.romsize || idl_src + idl_size > Pico.romsize ||
96 idl_size > 0x40000 || idl_dst + idl_size > 0x40000 || (idl_src & 3) || (idl_dst & 3)) {
97 elprintf(EL_STATUS|EL_ANOMALY, "32x: invalid initial data ptrs: %06x -> %06x, %06x",
98 idl_src, idl_dst, idl_size);
101 memcpy(Pico32xMem->sdram + idl_dst, Pico.rom + idl_src, idl_size);
104 vbr = HWSWAP(*(unsigned int *)(Pico.rom + 0x3e8));
105 sh2_set_gbr(0, 0x20004000);
109 Pico32x.regs[0x28 / 2] = *(unsigned short *)(Pico.rom + 0x18e);
110 // program will set M_OK
114 if (p32x_bios_s == NULL) {
118 vbr = HWSWAP(*(unsigned int *)(Pico.rom + 0x3ec));
119 sh2_set_gbr(1, 0x20004000);
121 // program will set S_OK
125 void Pico32xInit(void)
129 void PicoPower32x(void)
131 memset(&Pico32x, 0, sizeof(Pico32x));
133 Pico32x.regs[0] = P32XS_REN|P32XS_nRES; // verified
134 Pico32x.vdp_regs[0x0a/2] = P32XV_VBLK|P32XV_HBLK|P32XV_PEN;
135 Pico32x.sh2_regs[0] = P32XS2_ADEN;
138 void PicoUnload32x(void)
140 if (Pico32xMem != NULL)
141 plat_munmap(Pico32xMem, sizeof(*Pico32xMem));
146 PicoAHW &= ~PAHW_32X;
149 void PicoReset32x(void)
151 if (PicoAHW & PAHW_32X) {
152 Pico32x.sh2irqs |= P32XI_VRES;
154 p32x_poll_event(3, 0);
158 static void p32x_start_blank(void)
160 if (Pico32xDrawMode != PDM32X_OFF && !PicoSkipFrame) {
165 offs = 8; lines = 224;
166 if ((Pico.video.reg[1] & 8) && !(PicoOpt & POPT_ALT_RENDERER)) {
171 // XXX: no proper handling of 32col mode..
172 if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0 && // 32x not blanking
173 (Pico.video.reg[12] & 1) && // 40col mode
174 (PicoDrawMask & PDRAW_32X_ON))
176 int md_bg = Pico.video.reg[7] & 0x3f;
178 // we draw full layer (not line-by-line)
179 PicoDraw32xLayer(offs, lines, md_bg);
181 else if (Pico32xDrawMode != PDM32X_32X_ONLY)
182 PicoDraw32xLayerMdOnly(offs, lines);
188 Pico32x.vdp_regs[0x0a/2] |= P32XV_VBLK|P32XV_PEN;
190 // FB swap waits until vblank
191 if ((Pico32x.vdp_regs[0x0a/2] ^ Pico32x.pending_fb) & P32XV_FS) {
192 Pico32x.vdp_regs[0x0a/2] &= ~P32XV_FS;
193 Pico32x.vdp_regs[0x0a/2] |= Pico32x.pending_fb;
194 Pico32xSwapDRAM(Pico32x.pending_fb ^ 1);
197 Pico32x.sh2irqs |= P32XI_VINT;
199 p32x_poll_event(3, 1);
202 static __inline void run_m68k(int cyc)
206 p32x_poll_event(3, 0);
207 #if defined(EMU_C68K)
208 PicoCpuCM68k.cycles = cyc;
209 CycloneRun(&PicoCpuCM68k);
210 SekCycleCnt += cyc - PicoCpuCM68k.cycles;
211 #elif defined(EMU_M68K)
212 SekCycleCnt += m68k_execute(cyc);
213 #elif defined(EMU_F68K)
214 SekCycleCnt += fm68k_emulate(cyc+1, 0, 0);
220 // ~1463.8, but due to cache misses and slow mem
221 // it's much lower than that
222 //#define SH2_LINE_CYCLES 735
223 #define CYCLES_M68K2MSH2(x) (((x) * p32x_msh2_multiplier) >> 10)
224 #define CYCLES_M68K2SSH2(x) (((x) * p32x_ssh2_multiplier) >> 10)
227 #define CPUS_RUN_SIMPLE(m68k_cycles,s68k_cycles) \
230 SekCycleAim += m68k_cycles; \
231 while (SekCycleCnt < SekCycleAim) { \
232 slice = SekCycleCnt; \
233 run_m68k(SekCycleAim - SekCycleCnt); \
234 if (!(Pico32x.regs[0] & P32XS_nRES)) \
235 continue; /* SH2s reseting */ \
236 slice = SekCycleCnt - slice; /* real count from 68k */ \
237 if (SekCycleCnt < SekCycleAim) \
238 elprintf(EL_32X, "slice %d", slice); \
239 if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) { \
241 sh2_execute(&ssh2, CYCLES_M68K2SSH2(slice)); \
244 if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) { \
246 sh2_execute(&msh2, CYCLES_M68K2MSH2(slice)); \
249 pprof_start(dummy); \
255 #define CPUS_RUN_LOCKSTEP(m68k_cycles,s68k_cycles) \
258 for (i = 0; i <= (m68k_cycles) - STEP_68K; i += STEP_68K) { \
259 run_m68k(STEP_68K); \
260 if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) \
261 sh2_execute(&msh2, CYCLES_M68K2SH2(STEP_68K)); \
262 if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) \
263 sh2_execute(&ssh2, CYCLES_M68K2SH2(STEP_68K)); \
266 i = (m68k_cycles) - i; \
268 if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) \
269 sh2_execute(&msh2, CYCLES_M68K2SH2(i)); \
270 if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) \
271 sh2_execute(&ssh2, CYCLES_M68K2SH2(i)); \
274 #define CPUS_RUN CPUS_RUN_SIMPLE
275 //#define CPUS_RUN CPUS_RUN_LOCKSTEP
277 #include "../pico_cmn.c"
279 void PicoFrame32x(void)
281 pwm_frame_smp_cnt = 0;
283 Pico32x.vdp_regs[0x0a/2] &= ~P32XV_VBLK; // get out of vblank
284 if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0) // no forced blanking
285 Pico32x.vdp_regs[0x0a/2] &= ~P32XV_PEN; // no palette access
287 p32x_poll_event(3, 1);
291 elprintf(EL_32X, "poll: %02x", Pico32x.emu_flags);