/*
* PicoDrive
- * (C) notaz, 2009,2010
+ * (C) notaz, 2009,2010,2013
*
* This work is licensed under the terms of MAME license.
* See COPYING file in the top-level directory.
*
- * 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
* a1511e ? ? 401e
* a15120 (16 bytes comm) 2020
* a15130 (PWM) 2030
+ *
+ * SH2 addr lines:
+ * iii. .cc. ..xx * // Internal, Cs, x
+ *
+ * sh2 map, wait/bus cycles (from docs):
+ * r w
+ * rom 0000000-0003fff 1 -
+ * sys reg 0004000-00040ff 1 1
+ * vdp reg 0004100-00041ff 5 5
+ * vdp pal 0004200-00043ff 5 5
+ * rom 2000000-23fffff 6-15
+ * dram/fb 4000000-401ffff 5-12 1-3
+ * fb ovr 4020000-403ffff
+ * sdram 6000000-603ffff 12 2 (cycles)
+ * d.a. c0000000-?
*/
#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";
static void bank_switch(int b);
// poll detection
-#define POLL_THRESHOLD 6
+#define POLL_THRESHOLD 3
-struct poll_det {
- u32 addr, cycles, cyc_max;
- int cnt, flag;
-};
-static struct poll_det m68k_poll, sh2_poll[2];
+static struct {
+ u32 addr, cycles;
+ int cnt;
+} m68k_poll;
-static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 cycles, int is_vdp)
+static int m68k_poll_detect(u32 a, u32 cycles, u32 flags)
{
- int ret = 0, flag = pd->flag;
-
- if (is_vdp)
- flag <<= 3;
-
- 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, cyc %u",
- flag & (P32XF_68KPOLL|P32XF_68KVPOLL) ? "m68k" :
- (flag & (P32XF_MSH2POLL|P32XF_MSH2VPOLL) ? "msh2" : "ssh2"), a, cycles - pd->cycles);
+ int ret = 0;
+
+ if (a - 2 <= m68k_poll.addr && m68k_poll.addr <= a + 2
+ && cycles - m68k_poll.cycles <= 64)
+ {
+ if (m68k_poll.cnt++ > POLL_THRESHOLD) {
+ if (!(Pico32x.emu_flags & flags)) {
+ elprintf(EL_32X, "m68k poll addr %08x, cyc %u",
+ a, cycles - m68k_poll.cycles);
ret = 1;
}
- Pico32x.emu_flags |= flag;
+ Pico32x.emu_flags |= flags;
}
}
else {
- pd->cnt = 0;
- pd->addr = a;
+ m68k_poll.cnt = 0;
+ m68k_poll.addr = a;
}
- pd->cycles = cycles;
+ m68k_poll.cycles = cycles;
return ret;
}
-static int p32x_poll_undetect(struct poll_det *pd, int is_vdp)
+void p32x_m68k_poll_event(u32 flags)
+{
+ if (Pico32x.emu_flags & flags) {
+ elprintf(EL_32X, "m68k poll %02x -> %02x", Pico32x.emu_flags,
+ Pico32x.emu_flags & ~flags);
+ Pico32x.emu_flags &= ~flags;
+ SekSetStop(0);
+ }
+ m68k_poll.addr = m68k_poll.cnt = 0;
+}
+
+static void sh2_poll_detect(SH2 *sh2, u32 a, u32 flags)
{
- int ret = 0, flag = pd->flag;
- if (is_vdp)
- flag <<= 3; // VDP only
+ int cycles_left = sh2_cycles_left(sh2);
+
+ if (a == sh2->poll_addr && sh2->poll_cycles - cycles_left <= 10) {
+ if (sh2->poll_cnt++ > 3) {
+ if (!(sh2->state & flags))
+ elprintf(EL_32X, "%csh2 state: %02x->%02x", sh2->is_slave?'s':'m',
+ sh2->state, sh2->state | flags);
+
+ sh2->state |= flags;
+ sh2_end_run(sh2, 1);
+ pevt_log_sh2(sh2, EVT_POLL_START);
+ return;
+ }
+ }
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;
+ sh2->poll_cnt = 0;
+ sh2->poll_addr = a;
+ sh2->poll_cycles = cycles_left;
+}
+
+void p32x_sh2_poll_event(SH2 *sh2, u32 flags, u32 m68k_cycles)
+{
+ if (sh2->state & flags) {
+ elprintf(EL_32X, "%csh2 state: %02x->%02x", sh2->is_slave?'s':'m',
+ sh2->state, sh2->state & ~flags);
+
+ if (sh2->m68krcycles_done < m68k_cycles)
+ sh2->m68krcycles_done = m68k_cycles;
+
+ pevt_log_sh2_o(sh2, EVT_POLL_END);
}
- Pico32x.emu_flags &= ~flag;
- pd->addr = pd->cnt = 0;
- return ret;
+
+ sh2->state &= ~flags;
+ sh2->poll_addr = sh2->poll_cycles = sh2->poll_cnt = 0;
}
-void p32x_poll_event(int cpu_mask, int is_vdp)
+static void sh2s_sync_on_read(SH2 *sh2)
{
- if (cpu_mask & 1)
- p32x_poll_undetect(&sh2_poll[0], is_vdp);
- if (cpu_mask & 2)
- p32x_poll_undetect(&sh2_poll[1], is_vdp);
+ int cycles;
+ if (sh2->poll_cnt != 0)
+ return;
+
+ cycles = sh2_cycles_done(sh2);
+ if (cycles > 600)
+ p32x_sync_other_sh2(sh2, sh2->m68krcycles_done + cycles / 3);
}
// SH2 faking
//#define FAKE_SH2
-int p32x_csum_faked;
#ifdef FAKE_SH2
+static int p32x_csum_faked;
static const u16 comm_fakevals[] = {
0x4d5f, 0x4f4b, // M_OK
0x535f, 0x4f4b, // S_OK
#endif
// DMAC handling
-static struct {
- unsigned int sar0, dar0, tcr0; // src addr, dst addr, transfer count
- unsigned int chcr0; // chan ctl
- unsigned int sar1, dar1, tcr1; // same for chan 1
- unsigned int chcr1;
- int pad[4];
+struct dma_chan {
+ unsigned int sar, dar; // src, dst addr
+ unsigned int tcr; // transfer count
+ unsigned int chcr; // chan ctl
+ // -- dm dm sm sm ts ts ar am al ds dl tb ta ie te de
+ // ts - transfer size: 1, 2, 4, 16 bytes
+ // ar - auto request if 1, else dreq signal
+ // ie - irq enable
+ // te - transfer end
+ // de - dma enable
+ #define DMA_AR (1 << 9)
+ #define DMA_IE (1 << 2)
+ #define DMA_TE (1 << 1)
+ #define DMA_DE (1 << 0)
+};
+
+struct dmac {
+ struct dma_chan chan[2];
+ unsigned int vcrdma0;
+ unsigned int unknown0;
+ unsigned int vcrdma1;
+ unsigned int unknown1;
unsigned int dmaor;
-} * dmac0;
+ // -- pr ae nmif dme
+ // pr - priority: chan0 > chan1 or round-robin
+ // ae - address error
+ // nmif - nmi occurred
+ // dme - DMA master enable
+ #define DMA_DME (1 << 0)
+};
-static void dma_68k2sh2_do(void)
+static void dmac_te_irq(SH2 *sh2, struct dma_chan *chan)
+{
+ char *regs = (void *)Pico32xMem->sh2_peri_regs[sh2->is_slave];
+ struct dmac *dmac = (void *)(regs + 0x180);
+ int level = PREG8(regs, 0xe2) & 0x0f; // IPRA
+ int vector = (chan == &dmac->chan[0]) ?
+ dmac->vcrdma0 : dmac->vcrdma1;
+
+ elprintf(EL_32X, "dmac irq %d %d", level, vector);
+ sh2_internal_irq(sh2, level, vector & 0x7f);
+}
+
+static void dmac_transfer_complete(SH2 *sh2, struct dma_chan *chan)
+{
+ chan->chcr |= DMA_TE; // DMA has ended normally
+
+ p32x_sh2_poll_event(sh2, SH2_STATE_SLEEP, SekCyclesDoneT());
+ if (chan->chcr & DMA_IE)
+ dmac_te_irq(sh2, chan);
+}
+
+static void dmac_transfer_one(SH2 *sh2, struct dma_chan *chan)
+{
+ u32 size, d;
+
+ size = (chan->chcr >> 10) & 3;
+ switch (size) {
+ case 0:
+ d = p32x_sh2_read8(chan->sar, sh2);
+ p32x_sh2_write8(chan->dar, d, sh2);
+ case 1:
+ d = p32x_sh2_read16(chan->sar, sh2);
+ p32x_sh2_write16(chan->dar, d, sh2);
+ break;
+ case 2:
+ d = p32x_sh2_read32(chan->sar, sh2);
+ p32x_sh2_write32(chan->dar, d, sh2);
+ break;
+ case 3:
+ elprintf(EL_32X|EL_ANOMALY, "TODO: 16byte DMA");
+ chan->sar += 16; // always?
+ chan->tcr -= 4;
+ return;
+ }
+ chan->tcr--;
+
+ size = 1 << size;
+ if (chan->chcr & (1 << 15))
+ chan->dar -= size;
+ if (chan->chcr & (1 << 14))
+ chan->dar += size;
+ if (chan->chcr & (1 << 13))
+ chan->sar -= size;
+ if (chan->chcr & (1 << 12))
+ chan->sar += size;
+}
+
+static void dreq0_do(SH2 *sh2, struct dma_chan *chan)
{
unsigned short *dreqlen = &Pico32x.regs[0x10 / 2];
int i;
- if (dmac0->tcr0 != *dreqlen)
- elprintf(EL_32X|EL_ANOMALY, "tcr0 and dreq len differ: %d != %d", dmac0->tcr0, *dreqlen);
+ // debug/sanity checks
+ if (chan->tcr != *dreqlen)
+ elprintf(EL_32X|EL_ANOMALY, "dreq0: tcr0 and len differ: %d != %d",
+ chan->tcr, *dreqlen);
+ // note: DACK is not connected, single addr mode should not be used
+ if ((chan->chcr & 0x3f08) != 0x0400)
+ elprintf(EL_32X|EL_ANOMALY, "dreq0: bad control: %04x", chan->chcr);
+ if (chan->sar != 0x20004012)
+ elprintf(EL_32X|EL_ANOMALY, "dreq0: bad sar?: %08x\n", chan->sar);
// 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++) {
- 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--;
+ sh2->state |= SH2_STATE_SLEEP;
+
+ for (i = 0; i < Pico32x.dmac0_fifo_ptr && chan->tcr > 0; i++) {
+ elprintf(EL_32X, "dmaw [%08x] %04x, left %d",
+ chan->dar, Pico32x.dmac_fifo[i], *dreqlen);
+ p32x_sh2_write16(chan->dar, Pico32x.dmac_fifo[i], sh2);
+ chan->dar += 2;
+ chan->tcr--;
(*dreqlen)--;
}
- Pico32x.dmac_ptr = 0; // HACK
+ if (Pico32x.dmac0_fifo_ptr != i)
+ memmove(Pico32x.dmac_fifo, &Pico32x.dmac_fifo[i],
+ (Pico32x.dmac0_fifo_ptr - i) * 2);
+ Pico32x.dmac0_fifo_ptr -= i;
+
Pico32x.regs[6 / 2] &= ~P32XS_FULL;
if (*dreqlen == 0)
Pico32x.regs[6 / 2] &= ~P32XS_68S; // transfer complete
- if (dmac0->tcr0 == 0) {
- dmac0->chcr0 |= 2; // DMA has ended normally
- p32x_poll_undetect(&sh2_poll[0], 0);
+ if (chan->tcr == 0)
+ dmac_transfer_complete(sh2, chan);
+ else
+ sh2_end_run(sh2, 16);
+}
+
+static void dreq1_do(SH2 *sh2, struct dma_chan *chan)
+{
+ // debug/sanity checks
+ if ((chan->chcr & 0xc308) != 0x0000)
+ elprintf(EL_32X|EL_ANOMALY, "dreq1: bad control: %04x", chan->chcr);
+ if ((chan->dar & ~0xf) != 0x20004030)
+ elprintf(EL_32X|EL_ANOMALY, "dreq1: bad dar?: %08x\n", chan->dar);
+
+ dmac_transfer_one(sh2, chan);
+ if (chan->tcr == 0)
+ dmac_transfer_complete(sh2, chan);
+}
+
+static void dreq0_trigger(void)
+{
+ struct dmac *mdmac = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4];
+ struct dmac *sdmac = (void *)&Pico32xMem->sh2_peri_regs[1][0x180 / 4];
+
+ elprintf(EL_32X, "dreq0_trigger\n");
+ if ((mdmac->dmaor & DMA_DME) && (mdmac->chan[0].chcr & 3) == DMA_DE) {
+ dreq0_do(&msh2, &mdmac->chan[0]);
+ }
+ if ((sdmac->dmaor & DMA_DME) && (sdmac->chan[0].chcr & 3) == DMA_DE) {
+ dreq0_do(&ssh2, &sdmac->chan[0]);
+ }
+}
+
+void p32x_dreq1_trigger(void)
+{
+ struct dmac *mdmac = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4];
+ struct dmac *sdmac = (void *)&Pico32xMem->sh2_peri_regs[1][0x180 / 4];
+ int hit = 0;
+
+ elprintf(EL_32X, "dreq1_trigger\n");
+ if ((mdmac->dmaor & DMA_DME) && (mdmac->chan[1].chcr & 3) == DMA_DE) {
+ dreq1_do(&msh2, &mdmac->chan[1]);
+ hit = 1;
+ }
+ if ((sdmac->dmaor & DMA_DME) && (sdmac->chan[1].chcr & 3) == DMA_DE) {
+ dreq1_do(&ssh2, &sdmac->chan[1]);
+ hit = 1;
}
+
+ if (!hit)
+ elprintf(EL_32X|EL_ANOMALY, "dreq1: nobody cared");
+}
+
+// DMA trigger by SH2 register write
+static void dmac_trigger(SH2 *sh2, struct dma_chan *chan)
+{
+ elprintf(EL_32X, "sh2 DMA %08x->%08x, cnt %d, chcr %04x @%06x",
+ chan->sar, chan->dar, chan->tcr, chan->chcr, sh2->pc);
+ chan->tcr &= 0xffffff;
+
+ if (chan->chcr & DMA_AR) {
+ // auto-request transfer
+ while ((int)chan->tcr > 0)
+ dmac_transfer_one(sh2, chan);
+ dmac_transfer_complete(sh2, chan);
+ return;
+ }
+
+ // DREQ0 is only sent after first 4 words are written.
+ // we do multiple of 4 words to avoid messing up alignment
+ if (chan->sar == 0x20004012) {
+ if (Pico32x.dmac0_fifo_ptr && (Pico32x.dmac0_fifo_ptr & 3) == 0) {
+ elprintf(EL_32X, "68k -> sh2 DMA");
+ dreq0_trigger();
+ }
+ return;
+ }
+
+ elprintf(EL_32X|EL_ANOMALY, "unhandled DMA: "
+ "%08x->%08x, cnt %d, chcr %04x @%06x",
+ chan->sar, chan->dar, chan->tcr, chan->chcr, sh2->pc);
}
// ------------------------------------------------------------------
{
a &= 0x3e;
- if (a == 2) // INTM, INTS
- return ((Pico32x.sh2irqi[0] & P32XI_CMD) >> 4) | ((Pico32x.sh2irqi[1] & P32XI_CMD) >> 3);
#if 0
if ((a & 0x30) == 0x20)
return sh2_comm_faker(a);
#else
if ((a & 0x30) == 0x20) {
- // evil X-Men proto polls in a dbra loop and expects it to expire..
static u32 dr2 = 0;
+ unsigned int cycles = SekCyclesDoneT();
+ int comreg = 1 << (a & 0x0f) / 2;
+
+ // evil X-Men proto polls in a dbra loop and expects it to expire..
if (SekDar(2) != dr2)
m68k_poll.cnt = 0;
dr2 = SekDar(2);
- if (p32x_poll_detect(&m68k_poll, a, SekCyclesDoneT(), 0)) {
+ if (cycles - msh2.m68krcycles_done > 500)
+ p32x_sync_sh2s(cycles);
+ if (Pico32x.comm_dirty_sh2 & comreg)
+ Pico32x.comm_dirty_sh2 &= ~comreg;
+ else if (m68k_poll_detect(a, cycles, P32XF_68KCPOLL)) {
SekSetStop(1);
SekEndTimeslice(16);
}
dr2 = SekDar(2);
+ goto out;
}
#endif
+ if (a == 2) { // INTM, INTS
+ unsigned int cycles = SekCyclesDoneT();
+ if (cycles - msh2.m68krcycles_done > 64)
+ p32x_sync_sh2s(cycles);
+ return ((Pico32x.sh2irqi[0] & P32XI_CMD) >> 4) | ((Pico32x.sh2irqi[1] & P32XI_CMD) >> 3);
+ }
+
if ((a & 0x30) == 0x30)
- return p32x_pwm_read16(a);
+ return p32x_pwm_read16(a, SekCyclesDoneT());
+out:
return Pico32x.regs[a / 2];
}
return;
case 3: // irq ctl
if ((d & 1) && !(Pico32x.sh2irqi[0] & P32XI_CMD)) {
+ p32x_sync_sh2s(SekCyclesDoneT());
Pico32x.sh2irqi[0] |= P32XI_CMD;
- p32x_update_irls(0);
- SekEndRun(16);
+ p32x_update_irls(NULL);
}
if ((d & 2) && !(Pico32x.sh2irqi[1] & P32XI_CMD)) {
+ p32x_sync_sh2s(SekCyclesDoneT());
Pico32x.sh2irqi[1] |= P32XI_CMD;
- p32x_update_irls(0);
- SekEndRun(16);
+ p32x_update_irls(NULL);
}
return;
case 5: // bank
if ((a & 0x30) == 0x20) {
u8 *r8 = (u8 *)r;
+ int cycles = SekCyclesDoneT();
+ int comreg;
+
+ if (r8[a ^ 1] == d)
+ return;
+
+ comreg = 1 << (a & 0x0f) / 2;
+ if (Pico32x.comm_dirty_68k & comreg)
+ p32x_sync_sh2s(cycles);
+
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);
+ p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles);
+ p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles);
+ Pico32x.comm_dirty_68k |= comreg;
+
+ if (cycles - (int)msh2.m68krcycles_done > 120)
+ p32x_sync_sh2s(cycles);
return;
}
}
case 0x12: // FIFO reg
if (!(r[6 / 2] & P32XS_68S)) {
elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO w16 without 68S?");
- return;
+ return;
}
- if (Pico32x.dmac_ptr < DMAC_FIFO_LEN) {
- Pico32x.dmac_fifo[Pico32x.dmac_ptr++] = d;
- if ((Pico32x.dmac_ptr & 3) == 0 && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1))
- dma_68k2sh2_do();
- if (Pico32x.dmac_ptr == DMAC_FIFO_LEN)
+ if (Pico32x.dmac0_fifo_ptr < DMAC_FIFO_LEN) {
+ Pico32x.dmac_fifo[Pico32x.dmac0_fifo_ptr++] = d;
+ if ((Pico32x.dmac0_fifo_ptr & 3) == 0)
+ dreq0_trigger();
+ if (Pico32x.dmac0_fifo_ptr == DMAC_FIFO_LEN)
r[6 / 2] |= P32XS_FULL;
}
break;
return;
}
// comm port
- else if ((a & 0x30) == 0x20 && r[a / 2] != d) {
+ else if ((a & 0x30) == 0x20) {
+ int cycles = SekCyclesDoneT();
+ int comreg;
+
+ if (r[a / 2] == d)
+ return;
+
+ comreg = 1 << (a & 0x0f) / 2;
+ if (Pico32x.comm_dirty_68k & comreg)
+ p32x_sync_sh2s(cycles);
+
r[a / 2] = d;
- p32x_poll_undetect(&sh2_poll[0], 0);
- p32x_poll_undetect(&sh2_poll[1], 0);
- // same as for w8
- if (SekCyclesLeftNoMCD > 32)
- SekEndRun(32);
+ p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles);
+ p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles);
+ Pico32x.comm_dirty_68k |= comreg;
+
+ if (cycles - (int)msh2.m68krcycles_done > 120)
+ p32x_sync_sh2s(cycles);
return;
}
// PWM
else if ((a & 0x30) == 0x30) {
- p32x_pwm_write16(a, d);
+ p32x_pwm_write16(a, d, SekCyclesDoneT());
return;
}
u16 *r = Pico32x.vdp_regs;
a &= 0x0f;
- // for FEN checks between writes
- sh2_poll[0].cnt = 0;
-
// TODO: verify what's writeable
switch (a) {
case 0x01:
// if we are blanking and FS bit is changing
if (((r[0x0a/2] & P32XV_VBLK) || (r[0] & P32XV_Mx) == 0) && ((r[0x0a/2] ^ d) & P32XV_FS)) {
r[0x0a/2] ^= P32XV_FS;
- Pico32xSwapDRAM(d ^ 1);
+ Pico32xSwapDRAM(d ^ 1);
elprintf(EL_32X, "VDP FS: %d", r[0x0a/2] & P32XV_FS);
}
break;
}
}
-static void p32x_vdp_write16(u32 a, u32 d)
+static void p32x_vdp_write16(u32 a, u32 d, SH2 *sh2)
{
a &= 0x0e;
if (a == 6) { // fill start
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;
+ int len1 = len;
a = Pico32x.vdp_regs[6 / 2];
- while (len--) {
+ while (len1--) {
dram[a] = d;
a = (a & 0xff00) | ((a + 1) & 0xff);
}
- Pico32x.vdp_regs[6 / 2] = a;
- Pico32x.vdp_regs[8 / 2] = d;
+ Pico32x.vdp_regs[0x06 / 2] = a;
+ Pico32x.vdp_regs[0x08 / 2] = d;
+ if (sh2 != NULL && len > 4) {
+ Pico32x.vdp_regs[0x0a / 2] |= P32XV_nFEN;
+ // supposedly takes 3 bus/6 sh2 cycles? or 3 sh2 cycles?
+ p32x_event_schedule_sh2(sh2, P32X_EVENT_FILLEND, 3 + len);
+ }
return;
}
case 0x00: // adapter/irq ctl
return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0] | Pico32x.sh2irq_mask[cpuid];
case 0x04: // H count (often as comm too)
- if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0))
- ash2_end_run(8);
+ sh2_poll_detect(&sh2s[cpuid], a, SH2_STATE_CPOLL);
+ sh2s_sync_on_read(&sh2s[cpuid]);
return Pico32x.sh2_regs[4 / 2];
case 0x10: // DREQ len
return r[a / 2];
return r[a / 2];
// comm port
if ((a & 0x30) == 0x20) {
- if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0))
- ash2_end_run(8);
+ int comreg = 1 << (a & 0x0f) / 2;
+ if (Pico32x.comm_dirty_68k & comreg)
+ Pico32x.comm_dirty_68k &= ~comreg;
+ else
+ sh2_poll_detect(&sh2s[cpuid], a, SH2_STATE_CPOLL);
+ sh2s_sync_on_read(&sh2s[cpuid]);
return r[a / 2];
}
if ((a & 0x30) == 0x30) {
- sh2_poll[cpuid].cnt = 0;
- return p32x_pwm_read16(a);
+ return p32x_pwm_read16(a, sh2_cycles_done_m68k(&sh2s[cpuid]));
}
return 0;
static void p32x_sh2reg_write8(u32 a, u32 d, int cpuid)
{
a &= 0xff;
+
+ sh2s[cpuid].poll_addr = 0;
+
switch (a) {
case 0: // FM
Pico32x.regs[0] &= ~P32XS_FM;
Pico32x.regs[0] |= (d << 8) & P32XS_FM;
return;
- case 1: //
+ case 1: // HEN/irq masks
+ if ((d ^ Pico32x.sh2_regs[0]) & 0x80)
+ elprintf(EL_ANOMALY|EL_32X, "HEN");
Pico32x.sh2irq_mask[cpuid] = d & 0x8f;
Pico32x.sh2_regs[0] &= ~0x80;
Pico32x.sh2_regs[0] |= d & 0x80;
- p32x_update_irls(1);
+ if (d & 1)
+ p32x_pwm_schedule_sh2(&sh2s[cpuid]);
+ p32x_update_irls(&sh2s[cpuid]);
return;
case 5: // H count
- Pico32x.sh2_regs[4 / 2] = d & 0xff;
- p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
+ d &= 0xff;
+ if (Pico32x.sh2_regs[4 / 2] != d) {
+ Pico32x.sh2_regs[4 / 2] = d;
+ p32x_sh2_poll_event(&sh2s[cpuid ^ 1], SH2_STATE_CPOLL,
+ sh2_cycles_done_m68k(&sh2s[cpuid]));
+ sh2_end_run(&sh2s[cpuid], 4);
+ }
return;
}
if ((a & 0x30) == 0x20) {
u8 *r8 = (u8 *)Pico32x.regs;
+ int comreg;
+ if (r8[a ^ 1] == d)
+ return;
+
r8[a ^ 1] = d;
- if (p32x_poll_undetect(&m68k_poll, 0))
- SekSetStop(0);
- p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
+ p32x_m68k_poll_event(P32XF_68KCPOLL);
+ p32x_sh2_poll_event(&sh2s[cpuid ^ 1], SH2_STATE_CPOLL,
+ sh2_cycles_done_m68k(&sh2s[cpuid]));
+ comreg = 1 << (a & 0x0f) / 2;
+ Pico32x.comm_dirty_sh2 |= comreg;
return;
}
}
{
a &= 0xfe;
+ sh2s[cpuid].poll_addr = 0;
+
// comm
- if ((a & 0x30) == 0x20 && Pico32x.regs[a/2] != d) {
+ if ((a & 0x30) == 0x20) {
+ int comreg;
+ if (Pico32x.regs[a / 2] == d)
+ return;
+
Pico32x.regs[a / 2] = d;
- if (p32x_poll_undetect(&m68k_poll, 0))
- SekSetStop(0);
- p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
+ p32x_m68k_poll_event(P32XF_68KCPOLL);
+ p32x_sh2_poll_event(&sh2s[cpuid ^ 1], SH2_STATE_CPOLL,
+ sh2_cycles_done_m68k(&sh2s[cpuid]));
+ comreg = 1 << (a & 0x0f) / 2;
+ Pico32x.comm_dirty_sh2 |= comreg;
return;
}
// PWM
else if ((a & 0x30) == 0x30) {
- p32x_pwm_write16(a, d);
+ p32x_pwm_write16(a, d, sh2_cycles_done_m68k(&sh2s[cpuid]));
return;
}
case 0x1a: Pico32x.sh2irqi[cpuid] &= ~P32XI_CMD; goto irls;
case 0x1c:
Pico32x.sh2irqs &= ~P32XI_PWM;
- p32x_timers_do(0);
+ p32x_pwm_schedule_sh2(&sh2s[cpuid]);
goto irls;
}
return;
irls:
- p32x_update_irls(1);
+ p32x_update_irls(&sh2s[cpuid]);
}
// ------------------------------------------------------------------
break;
}
- if ((a == 0x1b0 || a == 0x18c) && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1)) {
- 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);
+ // perhaps starting a DMA?
+ if (a == 0x1b0 || a == 0x18c || a == 0x19c) {
+ struct dmac *dmac = (void *)&Pico32xMem->sh2_peri_regs[id][0x180 / 4];
+ if (!(dmac->dmaor & DMA_DME))
+ return;
- // 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) {
- elprintf(EL_32X, "68k -> sh2 DMA");
- dma_68k2sh2_do();
- }
+ if ((dmac->chan[0].chcr & (DMA_TE|DMA_DE)) == DMA_DE)
+ dmac_trigger(&sh2s[id], &dmac->chan[0]);
+ if ((dmac->chan[1].chcr & (DMA_TE|DMA_DE)) == DMA_DE)
+ dmac_trigger(&sh2s[id], &dmac->chan[1]);
}
}
return;
}
- if ((a & 0xfff0) == 0x5180) { // a15180
- p32x_vdp_write8(a, d);
- return;
- }
+ if (!(Pico32x.regs[0] & P32XS_FM)) {
+ if ((a & 0xfff0) == 0x5180) { // a15180
+ p32x_vdp_write8(a, d);
+ return;
+ }
- // TODO: verify
- if ((a & 0xfe00) == 0x5200) { // a15200
- elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d;
- Pico32x.dirty_pal = 1;
- return;
+ // TODO: verify
+ if ((a & 0xfe00) == 0x5200) { // a15200
+ elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
+ ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d;
+ Pico32x.dirty_pal = 1;
+ return;
+ }
}
elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
return;
}
- if ((a & 0xfff0) == 0x5180) { // a15180
- p32x_vdp_write16(a, d);
- return;
- }
+ if (!(Pico32x.regs[0] & P32XS_FM)) {
+ if ((a & 0xfff0) == 0x5180) { // a15180
+ p32x_vdp_write16(a, d, NULL); // FIXME?
+ return;
+ }
- if ((a & 0xfe00) == 0x5200) { // a15200
- Pico32xMem->pal[(a & 0x1ff) / 2] = d;
- Pico32x.dirty_pal = 1;
- return;
+ if ((a & 0xfe00) == 0x5200) { // a15200
+ Pico32xMem->pal[(a & 0x1ff) / 2] = d;
+ Pico32x.dirty_pal = 1;
+ return;
+ }
}
elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
if ((a & 0x3ff00) == 0x4100) {
d = p32x_vdp_read16(a);
- if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1))
- ash2_end_run(8);
+ sh2_poll_detect(&sh2s[id], a, SH2_STATE_VPOLL);
goto out_16to8;
}
if ((a & 0x3ff00) == 0x4100) {
d = p32x_vdp_read16(a);
- if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1))
- ash2_end_run(8);
+ sh2_poll_detect(&sh2s[id], a, SH2_STATE_VPOLL);
goto out;
}
elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x",
id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
- if ((a & 0x3ff00) == 0x4100) {
- p32x_vdp_write8(a, d);
- return 0;
+ if (Pico32x.regs[0] & P32XS_FM) {
+ if ((a & 0x3ff00) == 0x4100) {
+ sh2s[id].poll_addr = 0;
+ p32x_vdp_write8(a, d);
+ return 0;
+ }
}
if ((a & 0x3ff00) == 0x4000) {
elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x",
id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
- if ((a & 0x3ff00) == 0x4100) {
- sh2_poll[id].cnt = 0; // for poll before VDP accesses
- p32x_vdp_write16(a, d);
- return 0;
- }
+ if (Pico32x.regs[0] & P32XS_FM) {
+ if ((a & 0x3ff00) == 0x4100) {
+ sh2s[id].poll_addr = 0;
+ p32x_vdp_write16(a, d, &sh2s[id]);
+ return 0;
+ }
- if ((a & 0x3fe00) == 0x4200) {
- Pico32xMem->pal[(a & 0x1ff) / 2] = d;
- Pico32x.dirty_pal = 1;
- return 0;
+ if ((a & 0x3fe00) == 0x4200) {
+ Pico32xMem->pal[(a & 0x1ff) / 2] = d;
+ Pico32x.dirty_pal = 1;
+ return 0;
+ }
}
if ((a & 0x3ff00) == 0x4000) {
}
-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 int REGPARM(3) (sh2_write_handler)(u32 a, u32 d, int id);
0x2200, 0x03e4 // slave start pointer in ROM
};
-#define HWSWAP(x) (((x) << 16) | ((x) >> 16))
+#define HWSWAP(x) (((u16)(x) << 16) | ((x) >> 16))
static void get_bios(void)
{
u16 *ps;
return;
}
- dmac0 = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4];
-
get_bios();
// cartridge area becomes unmapped
msh2.write8_tab = ssh2.write8_tab = (const void **)(void *)sh2_write8_map;
msh2.write16_tab = ssh2.write16_tab = (const void **)(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;
-
-#ifdef DRC_SH2
sh2_drc_mem_setup(&msh2);
sh2_drc_mem_setup(&ssh2);
-#endif
}
-void Pico32xStateLoaded(void)
+void Pico32xMemStateLoaded(void)
{
bank_switch(Pico32x.regs[4 / 2]);
Pico32xSwapDRAM((Pico32x.vdp_regs[0x0a / 2] & P32XV_FS) ^ P32XV_FS);
- p32x_poll_event(3, 0);
- Pico32x.dirty_pal = 1;
memset(Pico32xMem->pwm, 0, sizeof(Pico32xMem->pwm));
-#ifdef DRC_SH2
+ Pico32x.dirty_pal = 1;
+
+ Pico32x.emu_flags &= ~(P32XF_68KCPOLL | P32XF_68KVPOLL);
+ memset(&m68k_poll, 0, sizeof(m68k_poll));
+ msh2.state = 0;
+ msh2.poll_addr = msh2.poll_cycles = msh2.poll_cnt = 0;
+ ssh2.state = 0;
+ ssh2.poll_addr = ssh2.poll_cycles = ssh2.poll_cnt = 0;
+
sh2_drc_flush_all();
-#endif
}
// vim:shiftwidth=2:ts=2:expandtab
notaz.gp2x.de / picodrive.git / blobdiff