X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=pico%2F32x%2Fmemory.c;h=ea4051bc7e227185ff31f6a2fe85c128328f5749;hb=71f68165b6e50f58ddbc6e98a38c7dd4968ccca2;hp=3efbebdd7bafff96eda8d38ab4b1e40c7c9db4ff;hpb=87accdf72da5e373876a6661217bbac69ce4d607;p=picodrive.git diff --git a/pico/32x/memory.c b/pico/32x/memory.c index 3efbebd..ea4051b 100644 --- a/pico/32x/memory.c +++ b/pico/32x/memory.c @@ -1,44 +1,78 @@ +/* + * SH2 addr lines: + * iii. .cc. ..xx * // Internal, Cs, x + * + * Register map: + * a15100 F....... R.....EA F.....AC N...VHMP 4000 // Fm Ren nrEs Aden Cart heN V H cMd Pwm + * a15102 ........ ......SM ? 4002 // intS intM + * a15104 ........ ......10 ........ hhhhhhhh 4004 // bk1 bk0 Hint + * a15106 F....... .....SDR UE...... .....SDR 4006 // Full 68S Dma Rv fUll[fb] Empt[fb] + * a15108 (32bit DREQ src) 4008 + * a1510c (32bit DREQ dst) 400c + * a15110 llllllll llllll00 4010 // DREQ Len + * a15112 (16bit FIFO reg) 4012 + * a15114 ? (16bit VRES clr) 4014 + * a15116 ? (16bit Vint clr) 4016 + * a15118 ? (16bit Hint clr) 4018 + * a1511a ........ .......C (16bit CMD clr) 401a // Cm + * a1511c ? (16bit PWM clr) 401c + * a1511e ? ? 401e + * a15120 (16 bytes comm) 2020 + * a15130 (PWM) 2030 + */ #include "../pico_int.h" #include "../memory.h" +#ifdef DRC_SH2 +#include "../../cpu/sh2/compiler.h" +#endif + +#if 0 +#undef ash2_end_run +#undef SekEndRun +#define ash2_end_run(x) +#define SekEndRun(x) +#endif static const char str_mars[] = "MARS"; +void *p32x_bios_g, *p32x_bios_m, *p32x_bios_s; struct Pico32xMem *Pico32xMem; static void bank_switch(int b); -#define MSB8(x) ((x) >> 8) - // poll detection #define POLL_THRESHOLD 6 struct poll_det { - int addr, pc, cnt, flag; + u32 addr, cycles, cyc_max; + int cnt, flag; }; static struct poll_det m68k_poll, sh2_poll[2]; -static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 pc, int is_vdp) +static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 cycles, int is_vdp) { int ret = 0, flag = pd->flag; if (is_vdp) flag <<= 3; - if (a - 2 <= pd->addr && pd->addr <= a + 2) { // && pd->pc == pc) { + if (a - 2 <= pd->addr && pd->addr <= a + 2 && cycles - pd->cycles <= pd->cyc_max) { pd->cnt++; if (pd->cnt > POLL_THRESHOLD) { if (!(Pico32x.emu_flags & flag)) { - elprintf(EL_32X, "%s poll addr %08x @ %06x", - flag == P32XF_68KPOLL ? "m68k" : (flag == P32XF_MSH2POLL ? "msh2" : "ssh2"), a, pc); + elprintf(EL_32X, "%s poll addr %08x, cyc %u", + flag & (P32XF_68KPOLL|P32XF_68KVPOLL) ? "m68k" : + (flag & (P32XF_MSH2POLL|P32XF_MSH2VPOLL) ? "msh2" : "ssh2"), a, cycles - pd->cycles); ret = 1; } Pico32x.emu_flags |= flag; } } - else + else { pd->cnt = 0; - pd->addr = a; - pd->pc = pc; + pd->addr = a; + } + pd->cycles = cycles; return ret; } @@ -47,11 +81,15 @@ static int p32x_poll_undetect(struct poll_det *pd, int is_vdp) { int ret = 0, flag = pd->flag; if (is_vdp) - flag <<= 3; - if (pd->cnt > POLL_THRESHOLD) + flag <<= 3; // VDP only + else + flag |= flag << 3; // both + if (Pico32x.emu_flags & flag) { + elprintf(EL_32X, "poll %02x -> %02x", Pico32x.emu_flags, Pico32x.emu_flags & ~flag); ret = 1; - pd->addr = pd->cnt = 0; + } Pico32x.emu_flags &= ~flag; + pd->addr = pd->cnt = 0; return ret; } @@ -110,10 +148,13 @@ static void dma_68k2sh2_do(void) if (dmac0->tcr0 != *dreqlen) elprintf(EL_32X|EL_ANOMALY, "tcr0 and dreq len differ: %d != %d", dmac0->tcr0, *dreqlen); + // HACK: assume bus is busy and SH2 is halted + // XXX: use different mechanism for this, not poll det + Pico32x.emu_flags |= P32XF_MSH2POLL; // id ? P32XF_SSH2POLL : P32XF_MSH2POLL; + for (i = 0; i < Pico32x.dmac_ptr && dmac0->tcr0 > 0; i++) { - extern void p32x_sh2_write16(u32 a, u32 d, int id); - elprintf(EL_32X|EL_ANOMALY, "dmaw [%08x] %04x, left %d", dmac0->dar0, Pico32x.dmac_fifo[i], *dreqlen); - p32x_sh2_write16(dmac0->dar0, Pico32x.dmac_fifo[i], 0); + elprintf(EL_32X, "dmaw [%08x] %04x, left %d", dmac0->dar0, Pico32x.dmac_fifo[i], *dreqlen); + p32x_sh2_write16(dmac0->dar0, Pico32x.dmac_fifo[i], &msh2); dmac0->dar0 += 2; dmac0->tcr0--; (*dreqlen)--; @@ -123,8 +164,10 @@ static void dma_68k2sh2_do(void) Pico32x.regs[6 / 2] &= ~P32XS_FULL; if (*dreqlen == 0) Pico32x.regs[6 / 2] &= ~P32XS_68S; // transfer complete - if (dmac0->tcr0 == 0) + if (dmac0->tcr0 == 0) { dmac0->chcr0 |= 2; // DMA has ended normally + p32x_poll_undetect(&sh2_poll[0], 0); + } } // ------------------------------------------------------------------ @@ -140,8 +183,18 @@ static u32 p32x_reg_read16(u32 a) if ((a & 0x30) == 0x20) return sh2_comm_faker(a); #else - if ((a & 0x30) == 0x20 && p32x_poll_detect(&m68k_poll, a, SekPc, 0)) { - SekEndRun(16); + if ((a & 0x30) == 0x20) { + // evil X-Men proto polls in a dbra loop and expects it to expire.. + static u32 dr2 = 0; + if (SekDar(2) != dr2) + m68k_poll.cnt = 0; + dr2 = SekDar(2); + + if (p32x_poll_detect(&m68k_poll, a, SekCyclesDoneT(), 0)) { + SekSetStop(1); + SekEndTimeslice(16); + } + dr2 = SekDar(2); } #endif @@ -159,19 +212,15 @@ static void p32x_reg_write8(u32 a, u32 d) // for things like bset on comm port m68k_poll.cnt = 0; - if (a == 1 && !(r[0] & 1)) { - r[0] |= 1; - Pico32xStartup(); - return; - } - - if (!(r[0] & 1)) - return; - switch (a) { case 0: // adapter ctl - r[0] = (r[0] & 0x83) | ((d << 8) & P32XS_FM); - break; + r[0] = (r[0] & ~P32XS_FM) | ((d << 8) & P32XS_FM); + return; + case 1: // adapter ctl, RES bit writeable + if ((d ^ r[0]) & d & P32XS_nRES) + p32x_reset_sh2s(); + r[0] = (r[0] & ~P32XS_nRES) | (d & P32XS_nRES); + return; case 3: // irq ctl if ((d & 1) && !(Pico32x.sh2irqi[0] & P32XI_CMD)) { Pico32x.sh2irqi[0] |= P32XI_CMD; @@ -183,20 +232,31 @@ static void p32x_reg_write8(u32 a, u32 d) p32x_update_irls(); SekEndRun(16); } - break; + return; case 5: // bank d &= 7; if (r[4 / 2] != d) { r[4 / 2] = d; bank_switch(d); } - break; + return; case 7: // DREQ ctl r[6 / 2] = (r[6 / 2] & P32XS_FULL) | (d & (P32XS_68S|P32XS_DMA|P32XS_RV)); - break; + return; case 0x1b: // TV r[0x1a / 2] = d; - break; + return; + } + + if ((a & 0x30) == 0x20) { + u8 *r8 = (u8 *)r; + r8[a ^ 1] = d; + p32x_poll_undetect(&sh2_poll[0], 0); + p32x_poll_undetect(&sh2_poll[1], 0); + // if some SH2 is busy waiting, it needs to see the result ASAP + if (SekCyclesLeftNoMCD > 32) + SekEndRun(32); + return; } } @@ -210,7 +270,9 @@ static void p32x_reg_write16(u32 a, u32 d) switch (a) { case 0x00: // adapter ctl - r[0] = (r[0] & 0x83) | (d & P32XS_FM); + if ((d ^ r[0]) & d & P32XS_nRES) + p32x_reset_sh2s(); + r[0] = (r[0] & ~(P32XS_FM|P32XS_nRES)) | (d & (P32XS_FM|P32XS_nRES)); return; case 0x10: // DREQ len r[a / 2] = d & ~3; @@ -238,9 +300,11 @@ static void p32x_reg_write16(u32 a, u32 d) // comm port else if ((a & 0x30) == 0x20 && r[a / 2] != d) { r[a / 2] = d; - if (p32x_poll_undetect(&sh2_poll[0], 0) || p32x_poll_undetect(&sh2_poll[1], 0)) - // if some SH2 is busy waiting, it needs to see the result ASAP - SekEndRun(16); + p32x_poll_undetect(&sh2_poll[0], 0); + p32x_poll_undetect(&sh2_poll[1], 0); + // same as for w8 + if (SekCyclesLeftNoMCD > 32) + SekEndRun(32); return; } // PWM @@ -277,6 +341,9 @@ static void p32x_vdp_write8(u32 a, u32 d) Pico32x.dirty_pal = 1; r[0] = (r[0] & P32XV_nPAL) | (d & 0xff); break; + case 0x05: // fill len + r[4 / 2] = d & 0xff; + break; case 0x0b: d &= 1; Pico32x.pending_fb = d; @@ -292,6 +359,24 @@ static void p32x_vdp_write8(u32 a, u32 d) static void p32x_vdp_write16(u32 a, u32 d) { + a &= 0x0e; + if (a == 6) { // fill start + Pico32x.vdp_regs[6 / 2] = d; + return; + } + if (a == 8) { // fill data + u16 *dram = Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; + int len = Pico32x.vdp_regs[4 / 2] + 1; + a = Pico32x.vdp_regs[6 / 2]; + while (len--) { + dram[a] = d; + a = (a & 0xff00) | ((a + 1) & 0xff); + } + Pico32x.vdp_regs[6 / 2] = a; + Pico32x.vdp_regs[8 / 2] = d; + return; + } + p32x_vdp_write8(a | 1, d); } @@ -306,7 +391,9 @@ static u32 p32x_sh2reg_read16(u32 a, int cpuid) switch (a) { case 0x00: // adapter/irq ctl return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0] | Pico32x.sh2irq_mask[cpuid]; - case 0x04: // H count + case 0x04: // H count (often as comm too) + if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0)) + ash2_end_run(8); return Pico32x.sh2_regs[4 / 2]; case 0x10: // DREQ len return r[a / 2]; @@ -317,7 +404,7 @@ static u32 p32x_sh2reg_read16(u32 a, int cpuid) return r[a / 2]; // comm port if ((a & 0x30) == 0x20) { - if (p32x_poll_detect(&sh2_poll[cpuid], a, sh2_pc(cpuid), 0)) + if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0)) ash2_end_run(8); return r[a / 2]; } @@ -336,16 +423,26 @@ static void p32x_sh2reg_write8(u32 a, u32 d, int cpuid) case 0: // FM Pico32x.regs[0] &= ~P32XS_FM; Pico32x.regs[0] |= (d << 8) & P32XS_FM; - break; + return; case 1: // Pico32x.sh2irq_mask[cpuid] = d & 0x8f; Pico32x.sh2_regs[0] &= ~0x80; Pico32x.sh2_regs[0] |= d & 0x80; p32x_update_irls(); - break; + return; case 5: // H count Pico32x.sh2_regs[4 / 2] = d & 0xff; - break; + p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); + return; + } + + if ((a & 0x30) == 0x20) { + u8 *r8 = (u8 *)Pico32x.regs; + r8[a ^ 1] = d; + if (p32x_poll_undetect(&m68k_poll, 0)) + SekSetStop(0); + p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); + return; } } @@ -356,7 +453,8 @@ static void p32x_sh2reg_write16(u32 a, u32 d, int cpuid) // comm if ((a & 0x30) == 0x20 && Pico32x.regs[a/2] != d) { Pico32x.regs[a / 2] = d; - p32x_poll_undetect(&m68k_poll, 0); + if (p32x_poll_undetect(&m68k_poll, 0)) + SekSetStop(0); p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); return; } @@ -375,7 +473,10 @@ static void p32x_sh2reg_write16(u32 a, u32 d, int cpuid) case 0x16: Pico32x.sh2irqs &= ~P32XI_VINT; goto irls; case 0x18: Pico32x.sh2irqs &= ~P32XI_HINT; goto irls; case 0x1a: Pico32x.sh2irqi[cpuid] &= ~P32XI_CMD; goto irls; - case 0x1c: Pico32x.sh2irqs &= ~P32XI_PWM; goto irls; + case 0x1c: + Pico32x.sh2irqs &= ~P32XI_PWM; + p32x_timers_do(0); + goto irls; } p32x_sh2reg_write8(a | 1, d, cpuid); @@ -387,20 +488,31 @@ irls: // ------------------------------------------------------------------ // SH2 internal peripherals +// we keep them in little endian format static u32 sh2_peripheral_read8(u32 a, int id) { u8 *r = (void *)Pico32xMem->sh2_peri_regs[id]; u32 d; a &= 0x1ff; - d = r[a]; - if (a == 4) - d = 0x84; // SCI SSR + d = PREG8(r, a); elprintf(EL_32X, "%csh2 peri r8 [%08x] %02x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id)); return d; } +static u32 sh2_peripheral_read16(u32 a, int id) +{ + u16 *r = (void *)Pico32xMem->sh2_peri_regs[id]; + u32 d; + + a &= 0x1ff; + d = r[(a / 2) ^ 1]; + + elprintf(EL_32X, "%csh2 peri r16 [%08x] %04x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id)); + return d; +} + static u32 sh2_peripheral_read32(u32 a, int id) { u32 d; @@ -417,35 +529,80 @@ static void sh2_peripheral_write8(u32 a, u32 d, int id) elprintf(EL_32X, "%csh2 peri w8 [%08x] %02x @%06x", id ? 's' : 'm', a, d, sh2_pc(id)); a &= 0x1ff; - r[a] = d; + PREG8(r, a) = d; + + // X-men SCI hack + if ((a == 2 && (d & 0x20)) || // transmiter enabled + (a == 4 && !(d & 0x80))) { // valid data in TDR + void *oregs = Pico32xMem->sh2_peri_regs[id ^ 1]; + if ((PREG8(oregs, 2) & 0x50) == 0x50) { // receiver + irq enabled + int level = PREG8(oregs, 0x60) >> 4; + int vector = PREG8(oregs, 0x63) & 0x7f; + elprintf(EL_32X, "%csh2 SCI recv irq (%d, %d)", (id ^ 1) ? 's' : 'm', level, vector); + sh2_internal_irq(&sh2s[id ^ 1], level, vector); + } + } +} + +static void sh2_peripheral_write16(u32 a, u32 d, int id) +{ + u16 *r = (void *)Pico32xMem->sh2_peri_regs[id]; + elprintf(EL_32X, "%csh2 peri w16 [%08x] %04x @%06x", id ? 's' : 'm', a, d, sh2_pc(id)); + + a &= 0x1ff; + + // evil WDT + if (a == 0x80) { + if ((d & 0xff00) == 0xa500) { // WTCSR + PREG8(r, 0x80) = d; + p32x_timers_recalc(); + } + if ((d & 0xff00) == 0x5a00) // WTCNT + PREG8(r, 0x81) = d; + return; + } + + r[(a / 2) ^ 1] = d; } static void sh2_peripheral_write32(u32 a, u32 d, int id) { - unsigned int *r = Pico32xMem->sh2_peri_regs[id]; + u32 *r = Pico32xMem->sh2_peri_regs[id]; elprintf(EL_32X, "%csh2 peri w32 [%08x] %08x @%06x", id ? 's' : 'm', a, d, sh2_pc(id)); a &= 0x1fc; r[a / 4] = d; switch (a) { - // division unit: + // division unit (TODO: verify): case 0x104: // DVDNT: divident L, starts divide elprintf(EL_32X, "%csh2 divide %08x / %08x", id ? 's' : 'm', d, r[0x100 / 4]); if (r[0x100 / 4]) { - r[0x118 / 4] = r[0x110 / 4] = d % r[0x100 / 4]; - r[0x11c / 4] = r[0x114 / 4] = d / r[0x100 / 4]; + signed int divisor = r[0x100 / 4]; + r[0x118 / 4] = r[0x110 / 4] = (signed int)d % divisor; + r[0x104 / 4] = r[0x11c / 4] = r[0x114 / 4] = (signed int)d / divisor; } + else + r[0x110 / 4] = r[0x114 / 4] = r[0x118 / 4] = r[0x11c / 4] = 0; // ? break; case 0x114: elprintf(EL_32X, "%csh2 divide %08x%08x / %08x @%08x", id ? 's' : 'm', r[0x110 / 4], d, r[0x100 / 4], sh2_pc(id)); if (r[0x100 / 4]) { - long long divident = (long long)r[0x110 / 4] << 32 | d; + signed long long divident = (signed long long)r[0x110 / 4] << 32 | d; + signed int divisor = r[0x100 / 4]; // XXX: undocumented mirroring to 0x118,0x11c? - r[0x118 / 4] = r[0x110 / 4] = divident % r[0x100 / 4]; - r[0x11c / 4] = r[0x114 / 4] = divident / r[0x100 / 4]; + r[0x118 / 4] = r[0x110 / 4] = divident % divisor; + divident /= divisor; + r[0x11c / 4] = r[0x114 / 4] = divident; + divident >>= 31; + if ((unsigned long long)divident + 1 > 1) { + //elprintf(EL_32X, "%csh2 divide overflow! @%08x", id ? 's' : 'm', sh2_pc(id)); + r[0x11c / 4] = r[0x114 / 4] = divident > 0 ? 0x7fffffff : 0x80000000; // overflow + } } + else + r[0x110 / 4] = r[0x114 / 4] = r[0x118 / 4] = r[0x11c / 4] = 0; // ? break; } @@ -453,6 +610,10 @@ static void sh2_peripheral_write32(u32 a, u32 d, int id) elprintf(EL_32X, "sh2 DMA %08x -> %08x, cnt %d, chcr %04x @%06x", dmac0->sar0, dmac0->dar0, dmac0->tcr0, dmac0->chcr0, sh2_pc(id)); dmac0->tcr0 &= 0xffffff; + + // HACK: assume 68k starts writing soon and end the timeslice + ash2_end_run(16); + // DREQ is only sent after first 4 words are written. // we do multiple of 4 words to avoid messing up alignment if (dmac0->sar0 == 0x20004012 && Pico32x.dmac_ptr && (Pico32x.dmac_ptr & 3) == 0) { @@ -463,8 +624,10 @@ static void sh2_peripheral_write32(u32 a, u32 d, int id) } // ------------------------------------------------------------------ -// default 32x handlers -u32 PicoRead8_32x(u32 a) +// 32x handlers + +// after ADEN +static u32 PicoRead8_32x_on(u32 a) { u32 d = 0; if ((a & 0xffc0) == 0x5100) { // a15100 @@ -472,8 +635,8 @@ u32 PicoRead8_32x(u32 a) goto out_16to8; } - if (!(Pico32x.regs[0] & 1)) - goto no_vdp; + if ((a & 0xfc00) != 0x5000) + return PicoRead8_io(a); if ((a & 0xfff0) == 0x5180) { // a15180 d = p32x_vdp_read16(a); @@ -485,7 +648,6 @@ u32 PicoRead8_32x(u32 a) goto out_16to8; } -no_vdp: if ((a & 0xfffc) == 0x30ec) { // a130ec d = str_mars[a & 3]; goto out; @@ -505,7 +667,7 @@ out: return d; } -u32 PicoRead16_32x(u32 a) +static u32 PicoRead16_32x_on(u32 a) { u32 d = 0; if ((a & 0xffc0) == 0x5100) { // a15100 @@ -513,8 +675,8 @@ u32 PicoRead16_32x(u32 a) goto out; } - if (!(Pico32x.regs[0] & 1)) - goto no_vdp; + if ((a & 0xfc00) != 0x5000) + return PicoRead16_io(a); if ((a & 0xfff0) == 0x5180) { // a15180 d = p32x_vdp_read16(a); @@ -526,7 +688,6 @@ u32 PicoRead16_32x(u32 a) goto out; } -no_vdp: if ((a & 0xfffc) == 0x30ec) { // a130ec d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; goto out; @@ -540,7 +701,7 @@ out: return d; } -void PicoWrite8_32x(u32 a, u32 d) +static void PicoWrite8_32x_on(u32 a, u32 d) { if ((a & 0xfc00) == 0x5000) elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); @@ -550,8 +711,10 @@ void PicoWrite8_32x(u32 a, u32 d) return; } - if (!(Pico32x.regs[0] & 1)) - goto no_vdp; + if ((a & 0xfc00) != 0x5000) { + PicoWrite8_io(a, d); + return; + } if ((a & 0xfff0) == 0x5180) { // a15180 p32x_vdp_write8(a, d); @@ -566,22 +729,23 @@ void PicoWrite8_32x(u32 a, u32 d) return; } -no_vdp: elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); } -void PicoWrite16_32x(u32 a, u32 d) +static void PicoWrite16_32x_on(u32 a, u32 d) { if ((a & 0xfc00) == 0x5000) - elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); + elprintf(EL_32X, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); if ((a & 0xffc0) == 0x5100) { // a15100 p32x_reg_write16(a, d); return; } - if (!(Pico32x.regs[0] & 1)) - goto no_vdp; + if ((a & 0xfc00) != 0x5000) { + PicoWrite16_io(a, d); + return; + } if ((a & 0xfff0) == 0x5180) { // a15180 p32x_vdp_write16(a, d); @@ -594,10 +758,109 @@ void PicoWrite16_32x(u32 a, u32 d) return; } -no_vdp: elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); } +// before ADEN +u32 PicoRead8_32x(u32 a) +{ + u32 d = 0; + if ((a & 0xffc0) == 0x5100) { // a15100 + // regs are always readable + d = ((u8 *)Pico32x.regs)[(a & 0x3f) ^ 1]; + goto out; + } + + if ((a & 0xfffc) == 0x30ec) { // a130ec + d = str_mars[a & 3]; + goto out; + } + + elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); + return d; + +out: + elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); + return d; +} + +u32 PicoRead16_32x(u32 a) +{ + u32 d = 0; + if ((a & 0xffc0) == 0x5100) { // a15100 + d = Pico32x.regs[(a & 0x3f) / 2]; + goto out; + } + + if ((a & 0xfffc) == 0x30ec) { // a130ec + d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; + goto out; + } + + elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); + return d; + +out: + elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); + return d; +} + +void PicoWrite8_32x(u32 a, u32 d) +{ + if ((a & 0xffc0) == 0x5100) { // a15100 + u16 *r = Pico32x.regs; + + elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); + a &= 0x3f; + if (a == 1) { + if ((d ^ r[0]) & d & P32XS_ADEN) { + Pico32xStartup(); + r[0] &= ~P32XS_nRES; // causes reset if specified by this write + r[0] |= P32XS_ADEN; + p32x_reg_write8(a, d); // forward for reset processing + } + return; + } + + // allow only COMM for now + if ((a & 0x30) == 0x20) { + u8 *r8 = (u8 *)r; + r8[a ^ 1] = d; + } + return; + } + + elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); +} + +void PicoWrite16_32x(u32 a, u32 d) +{ + if ((a & 0xffc0) == 0x5100) { // a15100 + u16 *r = Pico32x.regs; + + elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); + a &= 0x3e; + if (a == 0) { + if ((d ^ r[0]) & d & P32XS_ADEN) { + Pico32xStartup(); + r[0] &= ~P32XS_nRES; // causes reset if specified by this write + r[0] |= P32XS_ADEN; + p32x_reg_write16(a, d); // forward for reset processing + } + return; + } + + // allow only COMM for now + if ((a & 0x30) == 0x20) + r[a / 2] = d; + return; + } + + elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); +} + +// ----------------------------------------------------------------- + // hint vector is writeable static void PicoWrite8_hint(u32 a, u32 d) { @@ -619,14 +882,6 @@ static void PicoWrite16_hint(u32 a, u32 d) elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); } -void Pico32xSwapDRAM(int b) -{ - cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); - cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); - cpu68k_map_set(m68k_write8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); - cpu68k_map_set(m68k_write16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); -} - static void bank_switch(int b) { unsigned int rs, bank; @@ -646,59 +901,55 @@ static void bank_switch(int b) cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank); + +#ifdef EMU_F68K + // setup FAME fetchmap + for (rs = 0x90; rs < 0xa0; rs++) + PicoCpuFM68k.Fetch[rs] = (u32)Pico.rom + bank - 0x900000; +#endif } // ----------------------------------------------------------------- // SH2 // ----------------------------------------------------------------- -u32 p32x_sh2_read8(u32 a, int id) +// read8 +static u32 sh2_read8_unmapped(u32 a, int id) { - u32 d = 0; - - if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m)) - return Pico32xMem->sh2_rom_m[a ^ 1]; - if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s)) - return Pico32xMem->sh2_rom_s[a ^ 1]; - - if ((a & 0xdffc0000) == 0x06000000) - return Pico32xMem->sdram[(a & 0x3ffff) ^ 1]; - - if ((a & 0xdfc00000) == 0x02000000) - if ((a & 0x003fffff) < Pico.romsize) - return Pico.rom[(a & 0x3fffff) ^ 1]; - - if ((a & ~0xfff) == 0xc0000000) - return Pico32xMem->data_array[id][(a & 0xfff) ^ 1]; + elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x", + id ? 's' : 'm', a, 0, sh2_pc(id)); + return 0; +} - if ((a & 0xdffe0000) == 0x04000000) { - u8 *dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; - return dram[(a & 0x1ffff) ^ 1]; - } +static u32 sh2_read8_cs0(u32 a, int id) +{ + u32 d = 0; - if ((a & 0xdfffff00) == 0x4000) { + // 0x3ff00 is veridied + if ((a & 0x3ff00) == 0x4000) { d = p32x_sh2reg_read16(a, id); goto out_16to8; } - if ((a & 0xdfffff00) == 0x4100) { + if ((a & 0x3ff00) == 0x4100) { d = p32x_vdp_read16(a); - if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), 1)) + if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1)) ash2_end_run(8); goto out_16to8; } - if ((a & 0xdfffff00) == 0x4200) { + // TODO: mirroring? + if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m)) + return Pico32xMem->sh2_rom_m[a ^ 1]; + if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s)) + return Pico32xMem->sh2_rom_s[a ^ 1]; + + if ((a & 0x3ff00) == 0x4200) { d = Pico32xMem->pal[(a & 0x1ff) / 2]; goto out_16to8; } - if ((a & 0xfffffe00) == 0xfffffe00) - return sh2_peripheral_read8(a, id); - - elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x", - id ? 's' : 'm', a, d, sh2_pc(id)); - return d; + return sh2_read8_unmapped(a, id); out_16to8: if (a & 1) @@ -711,48 +962,48 @@ out_16to8: return d; } -u32 p32x_sh2_read16(u32 a, int id) +static u32 sh2_read8_da(u32 a, int id) { - u32 d = 0; - - if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m)) - return *(u16 *)(Pico32xMem->sh2_rom_m + a); - if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s)) - return *(u16 *)(Pico32xMem->sh2_rom_s + a); - - if ((a & 0xdffc0000) == 0x06000000) - return ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2]; - - if ((a & 0xdfc00000) == 0x02000000) - if ((a & 0x003fffff) < Pico.romsize) - return ((u16 *)Pico.rom)[(a & 0x3fffff) / 2]; + return Pico32xMem->data_array[id][(a & 0xfff) ^ 1]; +} - if ((a & ~0xfff) == 0xc0000000) - return ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2]; +// read16 +static u32 sh2_read16_unmapped(u32 a, int id) +{ + elprintf(EL_UIO, "%csh2 unmapped r16 [%08x] %04x @%06x", + id ? 's' : 'm', a, 0, sh2_pc(id)); + return 0; +} - if ((a & 0xdffe0000) == 0x04000000) - return Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2]; +static u32 sh2_read16_cs0(u32 a, int id) +{ + u32 d = 0; - if ((a & 0xdfffff00) == 0x4000) { + if ((a & 0x3ff00) == 0x4000) { d = p32x_sh2reg_read16(a, id); + if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM + return d; goto out; } - if ((a & 0xdfffff00) == 0x4100) { + if ((a & 0x3ff00) == 0x4100) { d = p32x_vdp_read16(a); - if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), 1)) + if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1)) ash2_end_run(8); goto out; } - if ((a & 0xdfffff00) == 0x4200) { + if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m)) + return *(u16 *)(Pico32xMem->sh2_rom_m + a); + if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s)) + return *(u16 *)(Pico32xMem->sh2_rom_s + a); + + if ((a & 0x3ff00) == 0x4200) { d = Pico32xMem->pal[(a & 0x1ff) / 2]; goto out; } - elprintf(EL_UIO, "%csh2 unmapped r16 [%08x] %04x @%06x", - id ? 's' : 'm', a, d, sh2_pc(id)); - return d; + return sh2_read16_unmapped(a, id); out: elprintf(EL_32X, "%csh2 r16 [%08x] %04x @%06x", @@ -760,128 +1011,394 @@ out: return d; } -u32 p32x_sh2_read32(u32 a, int id) +static u32 sh2_read16_da(u32 a, int id) { - if ((a & 0xfffffe00) == 0xfffffe00) - return sh2_peripheral_read32(a, id); - -// elprintf(EL_UIO, "sh2 r32 [%08x] %08x @%06x", a, d, ash2_pc()); - return (p32x_sh2_read16(a, id) << 16) | p32x_sh2_read16(a + 2, id); + return ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2]; } -void p32x_sh2_write8(u32 a, u32 d, int id) +static void sh2_write_ignore(u32 a, u32 d, int id) { - if ((a & 0xdffffc00) == 0x4000) - elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x", - id ? 's' : 'm', a, d & 0xff, sh2_pc(id)); - - if ((a & 0xdffc0000) == 0x06000000) { - Pico32xMem->sdram[(a & 0x3ffff) ^ 1] = d; - return; - } +} - if ((a & 0xdffc0000) == 0x04000000) { - u8 *dram; - if (!(a & 0x20000) || d) { - dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; - dram[(a & 0x1ffff) ^ 1] = d; - return; - } - } +// write8 +static void sh2_write8_unmapped(u32 a, u32 d, int id) +{ + elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x", + id ? 's' : 'm', a, d & 0xff, sh2_pc(id)); +} - if ((a & ~0xfff) == 0xc0000000) { - Pico32xMem->data_array[id][(a & 0xfff) ^ 1] = d; - return; - } +static void sh2_write8_cs0(u32 a, u32 d, int id) +{ + elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x", + id ? 's' : 'm', a, d & 0xff, sh2_pc(id)); - if ((a & 0xdfffff00) == 0x4100) { + if ((a & 0x3ff00) == 0x4100) { p32x_vdp_write8(a, d); return; } - if ((a & 0xdfffff00) == 0x4000) { + if ((a & 0x3ff00) == 0x4000) { p32x_sh2reg_write8(a, d, id); return; } - if ((a & 0xfffffe00) == 0xfffffe00) { - sh2_peripheral_write8(a, d, id); - return; + sh2_write8_unmapped(a, d, id); +} + +#define sh2_write8_dramN(n) \ + if (!(a & 0x20000) || d) { \ + u8 *dram = (u8 *)Pico32xMem->dram[n]; \ + dram[(a & 0x1ffff) ^ 1] = d; \ } - elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x", - id ? 's' : 'm', a, d & 0xff, sh2_pc(id)); +static void sh2_write8_dram0(u32 a, u32 d, int id) +{ + sh2_write8_dramN(0); } -void p32x_sh2_write16(u32 a, u32 d, int id) +static void sh2_write8_dram1(u32 a, u32 d, int id) { - if ((a & 0xdffffc00) == 0x4000) - elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x", - id ? 's' : 'm', a, d & 0xffff, sh2_pc(id)); + sh2_write8_dramN(1); +} - // ignore "Associative purge space" - if ((a & 0xf8000000) == 0x40000000) - return; +static void sh2_write8_sdram(u32 a, u32 d, int id) +{ + u32 a1 = a & 0x3ffff; +#ifdef DRC_SH2 + int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT]; + if (t) + sh2_drc_wcheck_ram(a, t, id); +#endif + Pico32xMem->sdram[a1 ^ 1] = d; +} - if ((a & 0xdffc0000) == 0x06000000) { - ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2] = d; - return; - } +static void sh2_write8_da(u32 a, u32 d, int id) +{ + u32 a1 = a & 0xfff; +#ifdef DRC_SH2 + int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT]; + if (t) + sh2_drc_wcheck_da(a, t, id); +#endif + Pico32xMem->data_array[id][a1 ^ 1] = d; +} - if ((a & ~0xfff) == 0xc0000000) { - ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2] = d; - return; - } +// write16 +static void sh2_write16_unmapped(u32 a, u32 d, int id) +{ + elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x", + id ? 's' : 'm', a, d & 0xffff, sh2_pc(id)); +} - if ((a & 0xdffc0000) == 0x04000000) { - u16 *pd = &Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2]; - if (!(a & 0x20000)) { - *pd = d; - return; - } - // overwrite - if (!(d & 0xff00)) d |= *pd & 0xff00; - if (!(d & 0x00ff)) d |= *pd & 0x00ff; - *pd = d; - return; - } +static void sh2_write16_cs0(u32 a, u32 d, int id) +{ + if (((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM + elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x", + id ? 's' : 'm', a, d & 0xffff, sh2_pc(id)); - if ((a & 0xdfffff00) == 0x4100) { + if ((a & 0x3ff00) == 0x4100) { + sh2_poll[id].cnt = 0; // for poll before VDP accesses p32x_vdp_write16(a, d); return; } - if ((a & 0xdffffe00) == 0x4200) { + if ((a & 0x3fe00) == 0x4200) { Pico32xMem->pal[(a & 0x1ff) / 2] = d; Pico32x.dirty_pal = 1; return; } - if ((a & 0xdfffff00) == 0x4000) { + if ((a & 0x3ff00) == 0x4000) { p32x_sh2reg_write16(a, d, id); return; } - elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x", - id ? 's' : 'm', a, d & 0xffff, sh2_pc(id)); + sh2_write16_unmapped(a, d, id); +} + +#define sh2_write16_dramN(n) \ + u16 *pd = &Pico32xMem->dram[n][(a & 0x1ffff) / 2]; \ + if (!(a & 0x20000)) { \ + *pd = d; \ + return; \ + } \ + /* overwrite */ \ + if (!(d & 0xff00)) d |= *pd & 0xff00; \ + if (!(d & 0x00ff)) d |= *pd & 0x00ff; \ + *pd = d + +static void sh2_write16_dram0(u32 a, u32 d, int id) +{ + sh2_write16_dramN(0); +} + +static void sh2_write16_dram1(u32 a, u32 d, int id) +{ + sh2_write16_dramN(1); +} + +static void sh2_write16_sdram(u32 a, u32 d, int id) +{ + u32 a1 = a & 0x3ffff; +#ifdef DRC_SH2 + int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT]; + if (t) + sh2_drc_wcheck_ram(a, t, id); +#endif + ((u16 *)Pico32xMem->sdram)[a1 / 2] = d; +} + +static void sh2_write16_da(u32 a, u32 d, int id) +{ + u32 a1 = a & 0xfff; +#ifdef DRC_SH2 + int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT]; + if (t) + sh2_drc_wcheck_da(a, t, id); +#endif + ((u16 *)Pico32xMem->data_array[id])[a1 / 2] = d; +} + + +typedef struct { + uptr addr; // stores (membase >> 1) or ((handler >> 1) | (1<<31)) + u32 mask; +} sh2_memmap; + +typedef u32 (sh2_read_handler)(u32 a, int id); +typedef void (sh2_write_handler)(u32 a, u32 d, int id); + +#define SH2MAP_ADDR2OFFS(a) \ + (((a >> 25) & 3) | ((a >> 27) & 0x1c)) + +u32 REGPARM(2) p32x_sh2_read8(u32 a, SH2 *sh2) +{ + const sh2_memmap *sh2_map = sh2->read8_map; + uptr p; + + sh2_map += SH2MAP_ADDR2OFFS(a); + p = sh2_map->addr; + if (p & (1 << 31)) + return ((sh2_read_handler *)(p << 1))(a, sh2->is_slave); + else + return *(u8 *)((p << 1) + ((a & sh2_map->mask) ^ 1)); +} + +u32 REGPARM(2) p32x_sh2_read16(u32 a, SH2 *sh2) +{ + const sh2_memmap *sh2_map = sh2->read16_map; + uptr p; + + sh2_map += SH2MAP_ADDR2OFFS(a); + p = sh2_map->addr; + if (p & (1 << 31)) + return ((sh2_read_handler *)(p << 1))(a, sh2->is_slave); + else + return *(u16 *)((p << 1) + ((a & sh2_map->mask) & ~1)); } -void p32x_sh2_write32(u32 a, u32 d, int id) +u32 REGPARM(2) p32x_sh2_read32(u32 a, SH2 *sh2) { - if ((a & 0xfffffe00) == 0xfffffe00) { - sh2_peripheral_write32(a, d, id); + const sh2_memmap *sh2_map = sh2->read16_map; + sh2_read_handler *handler; + u32 offs; + uptr p; + + offs = SH2MAP_ADDR2OFFS(a); + sh2_map += offs; + p = sh2_map->addr; + if (!(p & (1 << 31))) { + // XXX: maybe 32bit access instead with ror? + u16 *pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1)); + return (pd[0] << 16) | pd[1]; + } + + if (offs == 0x1f) + return sh2_peripheral_read32(a, sh2->is_slave); + + handler = (sh2_read_handler *)(p << 1); + return (handler(a, sh2->is_slave) << 16) | handler(a + 2, sh2->is_slave); +} + +void REGPARM(3) p32x_sh2_write8(u32 a, u32 d, SH2 *sh2) +{ + const void **sh2_wmap = sh2->write8_tab; + sh2_write_handler *wh; + + wh = sh2_wmap[SH2MAP_ADDR2OFFS(a)]; + wh(a, d, sh2->is_slave); +} + +void REGPARM(3) p32x_sh2_write16(u32 a, u32 d, SH2 *sh2) +{ + const void **sh2_wmap = sh2->write16_tab; + sh2_write_handler *wh; + + wh = sh2_wmap[SH2MAP_ADDR2OFFS(a)]; + wh(a, d, sh2->is_slave); +} + +void REGPARM(3) p32x_sh2_write32(u32 a, u32 d, SH2 *sh2) +{ + const void **sh2_wmap = sh2->write16_tab; + sh2_write_handler *handler; + u32 offs; + + offs = SH2MAP_ADDR2OFFS(a); + + if (offs == 0x1f) { + sh2_peripheral_write32(a, d, sh2->is_slave); return; } - p32x_sh2_write16(a, d >> 16, id); - p32x_sh2_write16(a + 2, d, id); + handler = sh2_wmap[offs]; + handler(a, d >> 16, sh2->is_slave); + handler(a + 2, d, sh2->is_slave); } +// ----------------------------------------------------------------- + +static const u16 msh2_code[] = { + // trap instructions + 0xaffe, // bra + 0x0009, // nop + // have to wait a bit until m68k initial program finishes clearing stuff + // to avoid races with game SH2 code, like in Tempo + 0xd004, // mov.l @(_m_ok,pc), r0 + 0xd105, // mov.l @(_cnt,pc), r1 + 0xd205, // mov.l @(_start,pc), r2 + 0x71ff, // add #-1, r1 + 0x4115, // cmp/pl r1 + 0x89fc, // bt -2 + 0xc208, // mov.l r0, @(h'20,gbr) + 0x6822, // mov.l @r2, r8 + 0x482b, // jmp @r8 + 0x0009, // nop + ('M'<<8)|'_', ('O'<<8)|'K', + 0x0001, 0x0000, + 0x2200, 0x03e0 // master start pointer in ROM +}; + +static const u16 ssh2_code[] = { + 0xaffe, // bra + 0x0009, // nop + // code to wait for master, in case authentic master BIOS is used + 0xd104, // mov.l @(_m_ok,pc), r1 + 0xd206, // mov.l @(_start,pc), r2 + 0xc608, // mov.l @(h'20,gbr), r0 + 0x3100, // cmp/eq r0, r1 + 0x8bfc, // bf #-2 + 0xd003, // mov.l @(_s_ok,pc), r0 + 0xc209, // mov.l r0, @(h'24,gbr) + 0x6822, // mov.l @r2, r8 + 0x482b, // jmp @r8 + 0x0009, // nop + ('M'<<8)|'_', ('O'<<8)|'K', + ('S'<<8)|'_', ('O'<<8)|'K', + 0x2200, 0x03e4 // slave start pointer in ROM +}; + #define HWSWAP(x) (((x) << 16) | ((x) >> 16)) +static void get_bios(void) +{ + u16 *ps; + u32 *pl; + int i; + + // M68K ROM + if (p32x_bios_g != NULL) { + elprintf(EL_STATUS|EL_32X, "32x: using supplied 68k BIOS"); + Byteswap(Pico32xMem->m68k_rom, p32x_bios_g, 0x100); + } + else { + // generate 68k ROM + ps = (u16 *)Pico32xMem->m68k_rom; + pl = (u32 *)ps; + for (i = 1; i < 0xc0/4; i++) + pl[i] = HWSWAP(0x880200 + (i - 1) * 6); + + // fill with nops + for (i = 0xc0/2; i < 0x100/2; i++) + ps[i] = 0x4e71; + +#if 0 + ps[0xc0/2] = 0x46fc; + ps[0xc2/2] = 0x2700; // move #0x2700,sr + ps[0xfe/2] = 0x60fe; // jump to self +#else + ps[0xfe/2] = 0x4e75; // rts +#endif + } + // fill remaining m68k_rom page with game ROM + memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100); + + // MSH2 + if (p32x_bios_m != NULL) { + elprintf(EL_STATUS|EL_32X, "32x: using supplied master SH2 BIOS"); + Byteswap(Pico32xMem->sh2_rom_m, p32x_bios_m, sizeof(Pico32xMem->sh2_rom_m)); + } + else { + pl = (u32 *)Pico32xMem->sh2_rom_m; + + // fill exception vector table to our trap address + for (i = 0; i < 128; i++) + pl[i] = HWSWAP(0x200); + + // startup code + memcpy(Pico32xMem->sh2_rom_m + 0x200, msh2_code, sizeof(msh2_code)); + + // reset SP + pl[1] = pl[3] = HWSWAP(0x6040000); + // start + pl[0] = pl[2] = HWSWAP(0x204); + } + + // SSH2 + if (p32x_bios_s != NULL) { + elprintf(EL_STATUS|EL_32X, "32x: using supplied slave SH2 BIOS"); + Byteswap(Pico32xMem->sh2_rom_s, p32x_bios_s, sizeof(Pico32xMem->sh2_rom_s)); + } + else { + pl = (u32 *)Pico32xMem->sh2_rom_s; + + // fill exception vector table to our trap address + for (i = 0; i < 128; i++) + pl[i] = HWSWAP(0x200); + + // startup code + memcpy(Pico32xMem->sh2_rom_s + 0x200, ssh2_code, sizeof(ssh2_code)); + + // reset SP + pl[1] = pl[3] = HWSWAP(0x603f800); + // start + pl[0] = pl[2] = HWSWAP(0x204); + } +} + +#define MAP_MEMORY(m) ((uptr)(m) >> 1) +#define MAP_HANDLER(h) (((uptr)(h) >> 1) | (1 << 31)) + +static sh2_memmap sh2_read8_map[0x20], sh2_read16_map[0x20]; +// for writes we are using handlers only +static void *sh2_write8_map[0x20], *sh2_write16_map[0x20]; + +void Pico32xSwapDRAM(int b) +{ + cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); + cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); + cpu68k_map_set(m68k_write8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); + cpu68k_map_set(m68k_write16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); + + // SH2 + sh2_read8_map[2].addr = sh2_read8_map[6].addr = + sh2_read16_map[2].addr = sh2_read16_map[6].addr = MAP_MEMORY(Pico32xMem->dram[b]); + + sh2_write8_map[2] = sh2_write8_map[6] = b ? sh2_write8_dram1 : sh2_write8_dram0; + sh2_write16_map[2] = sh2_write16_map[6] = b ? sh2_write16_dram1 : sh2_write16_dram0; +} + void PicoMemSetup32x(void) { - unsigned short *ps; - unsigned int *pl; unsigned int rs; int i; @@ -893,57 +1410,7 @@ void PicoMemSetup32x(void) dmac0 = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4]; - // generate 68k ROM - ps = (unsigned short *)Pico32xMem->m68k_rom; - pl = (unsigned int *)Pico32xMem->m68k_rom; - for (i = 1; i < 0xc0/4; i++) - pl[i] = HWSWAP(0x880200 + (i - 1) * 6); - - // fill with nops - for (i = 0xc0/2; i < 0x100/2; i++) - ps[i] = 0x4e71; - -#if 0 - ps[0xc0/2] = 0x46fc; - ps[0xc2/2] = 0x2700; // move #0x2700,sr - ps[0xfe/2] = 0x60fe; // jump to self -#else - ps[0xfe/2] = 0x4e75; // rts -#endif - - // fill remaining mem with ROM - memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100); - - // 32X ROM - // TODO: move - { - FILE *f = fopen("32X_M_BIOS.BIN", "rb"); - int i; - if (f == NULL) { - printf("missing 32X_M_BIOS.BIN\n"); - exit(1); - } - fread(Pico32xMem->sh2_rom_m, 1, sizeof(Pico32xMem->sh2_rom_m), f); - fclose(f); - f = fopen("32X_S_BIOS.BIN", "rb"); - if (f == NULL) { - printf("missing 32X_S_BIOS.BIN\n"); - exit(1); - } - fread(Pico32xMem->sh2_rom_s, 1, sizeof(Pico32xMem->sh2_rom_s), f); - fclose(f); - // byteswap - for (i = 0; i < sizeof(Pico32xMem->sh2_rom_m); i += 2) { - int t = Pico32xMem->sh2_rom_m[i]; - Pico32xMem->sh2_rom_m[i] = Pico32xMem->sh2_rom_m[i + 1]; - Pico32xMem->sh2_rom_m[i + 1] = t; - } - for (i = 0; i < sizeof(Pico32xMem->sh2_rom_s); i += 2) { - int t = Pico32xMem->sh2_rom_s[i]; - Pico32xMem->sh2_rom_s[i] = Pico32xMem->sh2_rom_s[i + 1]; - Pico32xMem->sh2_rom_s[i + 1] = t; - } - } + get_bios(); // cartridge area becomes unmapped // XXX: we take the easy way and don't unmap ROM, @@ -957,22 +1424,89 @@ void PicoMemSetup32x(void) cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1); - // DRAM area - Pico32xSwapDRAM(1); - // 32X ROM (unbanked, XXX: consider mirroring?) rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; if (rs > 0x80000) rs = 0x80000; cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); +#ifdef EMU_F68K + // setup FAME fetchmap + PicoCpuFM68k.Fetch[0] = (u32)Pico32xMem->m68k_rom; + for (rs = 0x88; rs < 0x90; rs++) + PicoCpuFM68k.Fetch[rs] = (u32)Pico.rom - 0x880000; +#endif // 32X ROM (banked) bank_switch(0); + // SYS regs + cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_32x_on, 1); + cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_32x_on, 1); + cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_32x_on, 1); + cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_32x_on, 1); + + // SH2 maps: A31,A30,A29,CS1,CS0 + // all unmapped by default + for (i = 0; i < 0x20; i++) { + sh2_read8_map[i].addr = MAP_HANDLER(sh2_read8_unmapped); + sh2_read16_map[i].addr = MAP_HANDLER(sh2_read16_unmapped); + sh2_write8_map[i] = sh2_write8_unmapped; + sh2_write16_map[i] = sh2_write16_unmapped; + } + + // "purge area" + for (i = 0x08; i <= 0x0b; i++) { + sh2_write8_map[i] = + sh2_write16_map[i] = sh2_write_ignore; + } + + // CS0 + sh2_read8_map[0].addr = sh2_read8_map[4].addr = MAP_HANDLER(sh2_read8_cs0); + sh2_read16_map[0].addr = sh2_read16_map[4].addr = MAP_HANDLER(sh2_read16_cs0); + sh2_write8_map[0] = sh2_write8_map[4] = sh2_write8_cs0; + sh2_write16_map[0] = sh2_write16_map[4] = sh2_write16_cs0; + // CS1 - ROM + sh2_read8_map[1].addr = sh2_read8_map[5].addr = + sh2_read16_map[1].addr = sh2_read16_map[5].addr = MAP_MEMORY(Pico.rom); + sh2_read8_map[1].mask = sh2_read8_map[5].mask = + sh2_read16_map[1].mask = sh2_read16_map[5].mask = 0x3fffff; // FIXME + // CS2 - DRAM - done by Pico32xSwapDRAM() + sh2_read8_map[2].mask = sh2_read8_map[6].mask = + sh2_read16_map[2].mask = sh2_read16_map[6].mask = 0x01ffff; + // CS3 - SDRAM + sh2_read8_map[3].addr = sh2_read8_map[7].addr = + sh2_read16_map[3].addr = sh2_read16_map[7].addr = MAP_MEMORY(Pico32xMem->sdram); + sh2_write8_map[3] = sh2_write8_map[7] = sh2_write8_sdram; + sh2_write16_map[3] = sh2_write16_map[7] = sh2_write16_sdram; + sh2_read8_map[3].mask = sh2_read8_map[7].mask = + sh2_read16_map[3].mask = sh2_read16_map[7].mask = 0x03ffff; + // SH2 data array + sh2_read8_map[0x18].addr = MAP_HANDLER(sh2_read8_da); + sh2_read16_map[0x18].addr = MAP_HANDLER(sh2_read16_da); + sh2_write8_map[0x18] = sh2_write8_da; + sh2_write16_map[0x18] = sh2_write16_da; + // SH2 IO + sh2_read8_map[0x1f].addr = MAP_HANDLER(sh2_peripheral_read8); + sh2_read16_map[0x1f].addr = MAP_HANDLER(sh2_peripheral_read16); + sh2_write8_map[0x1f] = sh2_peripheral_write8; + sh2_write16_map[0x1f] = sh2_peripheral_write16; + + // map DRAM area, both 68k and SH2 + Pico32xSwapDRAM(1); + + msh2.read8_map = ssh2.read8_map = sh2_read8_map; + msh2.read16_map = ssh2.read16_map = sh2_read16_map; + msh2.write8_tab = ssh2.write8_tab = (const void **)sh2_write8_map; + msh2.write16_tab = ssh2.write16_tab = (const void **)sh2_write16_map; + // setup poll detector m68k_poll.flag = P32XF_68KPOLL; + m68k_poll.cyc_max = 64; sh2_poll[0].flag = P32XF_MSH2POLL; + sh2_poll[0].cyc_max = 21; sh2_poll[1].flag = P32XF_SSH2POLL; + sh2_poll[1].cyc_max = 16; } +// vim:shiftwidth=2:expandtab