+/*
+ * PicoDrive
+ * (C) notaz, 2009,2010,2013
+ *
+ * This work is licensed under the terms of MAME license.
+ * See COPYING file in the top-level directory.
+ *
+ * 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
+ *
+ * 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"
+#include "../../cpu/sh2/compiler.h"
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
+#define POLL_THRESHOLD 3
-struct poll_det {
- int addr, pc, cnt;
-};
-static struct poll_det m68k_poll, msh2_poll;
+static struct {
+ u32 addr, cycles;
+ int cnt;
+} m68k_poll;
-static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 pc, int flag)
+static int m68k_poll_detect(u32 a, u32 cycles, u32 flags)
{
int ret = 0;
- if (a - 2 <= pd->addr && pd->addr <= a + 2 && pd->pc == pc) {
- 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);
+ 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;
- pd->pc = pc;
+ else {
+ m68k_poll.cnt = 0;
+ m68k_poll.addr = a;
+ }
+ m68k_poll.cycles = cycles;
return ret;
}
-static int p32x_poll_undetect(struct poll_det *pd, int flag)
+void p32x_m68k_poll_event(u32 flags)
{
- int ret = 0;
- if (pd->cnt > POLL_THRESHOLD)
- ret = 1;
- pd->addr = pd->cnt = 0;
- Pico32x.emu_flags &= ~flag;
- return ret;
+ 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 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
+ sh2->poll_cnt = 0;
+ sh2->poll_addr = a;
+ sh2->poll_cycles = cycles_left;
}
-void p32x_poll_event(int is_vdp)
+void p32x_sh2_poll_event(SH2 *sh2, u32 flags, u32 m68k_cycles)
{
- p32x_poll_undetect(&msh2_poll, is_vdp ? P32XF_MSH2VPOLL : P32XF_MSH2POLL);
+ 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);
+ }
+
+ sh2->state &= ~flags;
+ sh2->poll_addr = sh2->poll_cycles = sh2->poll_cnt = 0;
+}
+
+static void sh2s_sync_on_read(SH2 *sh2)
+{
+ 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;
+//#define FAKE_SH2
#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];
- unsigned int dmaor;
-} * dmac0;
-
-static void dma_68k2sh2_do(void)
-{
- 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);
-
- for (i = 0; i < Pico32x.dmac_ptr && dmac0->tcr0 > 0; i++) {
- extern void p32x_sh2_write16(u32 a, u32 d);
- 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]);
- dmac0->dar0 += 2;
- dmac0->tcr0--;
- (*dreqlen)--;
- }
-
- Pico32x.dmac_ptr = 0; // HACK
- 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(&m68k_poll, P32XF_68KPOLL);
-}
-
// ------------------------------------------------------------------
+// 68k regs
static u32 p32x_reg_read16(u32 a)
{
if ((a & 0x30) == 0x20)
return sh2_comm_faker(a);
#else
- if (p32x_poll_detect(&m68k_poll, a, SekPc, P32XF_68KPOLL)) {
- SekEndRun(16);
+ if ((a & 0x30) == 0x20) {
+ 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 (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
-#ifdef FAKE_SH2
- // fake only slave for now
- if (a == 0x24 || a == 0x26)
- return sh2_comm_faker(a);
-#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, NULL, SekCyclesDoneT());
+
+out:
return Pico32x.regs[a / 2];
}
u16 *r = Pico32x.regs;
a &= 0x3f;
- if (a == 1 && !(r[0] & 1)) {
- r[0] |= 1;
- Pico32xStartup();
- return;
- }
-
- if (!(r[0] & 1))
- return;
+ // for things like bset on comm port
+ m68k_poll.cnt = 0;
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;
- p32x_update_irls();
+ if ((d & 1) != !!(Pico32x.sh2irqi[0] & P32XI_CMD)) {
+ p32x_sync_sh2s(SekCyclesDoneT());
+ if (d & 1)
+ Pico32x.sh2irqi[0] |= P32XI_CMD;
+ else
+ Pico32x.sh2irqi[0] &= ~P32XI_CMD;
+ p32x_update_irls(NULL, SekCyclesDoneT2());
}
- break;
+ if (!!(d & 2) != !!(Pico32x.sh2irqi[1] & P32XI_CMD)) {
+ p32x_sync_sh2s(SekCyclesDoneT());
+ if (d & 2)
+ Pico32x.sh2irqi[1] |= P32XI_CMD;
+ else
+ Pico32x.sh2irqi[1] &= ~P32XI_CMD;
+ p32x_update_irls(NULL, SekCyclesDoneT2());
+ }
+ 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_RV));
- break;
+ r[6 / 2] = (r[6 / 2] & P32XS_FULL) | (d & (P32XS_68S|P32XS_DMA|P32XS_RV));
+ return;
+ case 0x1b: // TV
+ r[0x1a / 2] = d;
+ return;
+ }
+
+ 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_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;
}
}
u16 *r = Pico32x.regs;
a &= 0x3e;
- // for write loops with FIFO checks..
+ // for things like bset on comm port
m68k_poll.cnt = 0;
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;
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)
+ p32x_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;
- if (p32x_poll_undetect(&msh2_poll, P32XF_MSH2POLL))
- // if SH2 is busy waiting, it needs to see the result ASAP
- SekEndRun(16);
+ 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, NULL, SekCyclesDoneT());
return;
}
u16 *r = Pico32x.vdp_regs;
a &= 0x0f;
- // for FEN checks between writes
- msh2_poll.cnt = 0;
-
// TODO: verify what's writeable
switch (a) {
case 0x01:
Pico32x.dirty_pal = 1;
r[0] = (r[0] & P32XV_nPAL) | (d & 0xff);
break;
+ case 0x03: // shift (for pp mode)
+ r[2 / 2] = d & 1;
+ break;
+ case 0x05: // fill len
+ r[4 / 2] = d & 0xff;
+ break;
case 0x0b:
d &= 1;
Pico32x.pending_fb = d;
// 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] ^= 1;
- Pico32xSwapDRAM(d ^ 1);
+ r[0x0a/2] ^= P32XV_FS;
+ 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
+ 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;
+ int len1 = len;
+ a = Pico32x.vdp_regs[6 / 2];
+ while (len1--) {
+ dram[a] = d;
+ a = (a & 0xff00) | ((a + 1) & 0xff);
+ }
+ 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;
+ }
+
p32x_vdp_write8(a | 1, d);
}
// ------------------------------------------------------------------
// SH2 regs
-static u32 p32x_sh2reg_read16(u32 a)
+
+static u32 p32x_sh2reg_read16(u32 a, SH2 *sh2)
{
u16 *r = Pico32x.regs;
a &= 0xfe; // ?
switch (a) {
case 0x00: // adapter/irq ctl
- return (r[0] & P32XS_FM) | P32XS2_ADEN | Pico32x.sh2irq_mask[0];
+ return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0]
+ | Pico32x.sh2irq_mask[sh2->is_slave];
+ case 0x04: // H count (often as comm too)
+ sh2_poll_detect(sh2, a, SH2_STATE_CPOLL);
+ sh2s_sync_on_read(sh2);
+ return Pico32x.sh2_regs[4 / 2];
case 0x10: // DREQ len
return r[a / 2];
}
- // DREQ src, dst; comm port
- if ((a & 0x38) == 0x08 || (a & 0x30) == 0x20)
+ // DREQ src, dst
+ if ((a & 0x38) == 0x08)
return r[a / 2];
+ // comm port
+ if ((a & 0x30) == 0x20) {
+ int comreg = 1 << (a & 0x0f) / 2;
+ if (Pico32x.comm_dirty_68k & comreg)
+ Pico32x.comm_dirty_68k &= ~comreg;
+ else
+ sh2_poll_detect(sh2, a, SH2_STATE_CPOLL);
+ sh2s_sync_on_read(sh2);
+ return r[a / 2];
+ }
+ if ((a & 0x30) == 0x30) {
+ return p32x_pwm_read16(a, sh2, sh2_cycles_done_m68k(sh2));
+ }
return 0;
}
-static void p32x_sh2reg_write8(u32 a, u32 d)
+static void p32x_sh2reg_write8(u32 a, u32 d, SH2 *sh2)
{
a &= 0xff;
- if (a == 1) {
- Pico32x.sh2irq_mask[0] = d & 0x0f;
- p32x_update_irls();
+
+ sh2->poll_addr = 0;
+
+ switch (a) {
+ case 0: // FM
+ Pico32x.regs[0] &= ~P32XS_FM;
+ Pico32x.regs[0] |= (d << 8) & P32XS_FM;
+ return;
+ case 1: // HEN/irq masks
+ if ((d ^ Pico32x.sh2_regs[0]) & 0x80)
+ elprintf(EL_ANOMALY|EL_32X, "HEN");
+ Pico32x.sh2irq_mask[sh2->is_slave] = d & 0x8f;
+ Pico32x.sh2_regs[0] &= ~0x80;
+ Pico32x.sh2_regs[0] |= d & 0x80;
+ if (d & 1)
+ p32x_pwm_schedule_sh2(sh2);
+ p32x_update_irls(sh2, 0);
+ return;
+ case 5: // H count
+ d &= 0xff;
+ if (Pico32x.sh2_regs[4 / 2] != d) {
+ Pico32x.sh2_regs[4 / 2] = d;
+ p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL,
+ sh2_cycles_done_m68k(sh2));
+ sh2_end_run(sh2, 4);
+ }
+ return;
+ }
+
+ if ((a & 0x30) == 0x20) {
+ u8 *r8 = (u8 *)Pico32x.regs;
+ int comreg;
+ if (r8[a ^ 1] == d)
+ return;
+
+ r8[a ^ 1] = d;
+ p32x_m68k_poll_event(P32XF_68KCPOLL);
+ p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL,
+ sh2_cycles_done_m68k(sh2));
+ comreg = 1 << (a & 0x0f) / 2;
+ Pico32x.comm_dirty_sh2 |= comreg;
+ return;
}
}
-static void p32x_sh2reg_write16(u32 a, u32 d)
+static void p32x_sh2reg_write16(u32 a, u32 d, SH2 *sh2)
{
a &= 0xfe;
- if ((a & 0x30) == 0x20 && Pico32x.regs[a/2] != d) {
- Pico32x.regs[a/2] = d;
- p32x_poll_undetect(&m68k_poll, P32XF_68KPOLL);
+ sh2->poll_addr = 0;
+
+ // comm
+ if ((a & 0x30) == 0x20) {
+ int comreg;
+ if (Pico32x.regs[a / 2] == d)
+ return;
+
+ Pico32x.regs[a / 2] = d;
+ p32x_m68k_poll_event(P32XF_68KCPOLL);
+ p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL,
+ sh2_cycles_done_m68k(sh2));
+ comreg = 1 << (a & 0x0f) / 2;
+ Pico32x.comm_dirty_sh2 |= comreg;
+ return;
+ }
+ // PWM
+ else if ((a & 0x30) == 0x30) {
+ p32x_pwm_write16(a, d, sh2, sh2_cycles_done_m68k(sh2));
return;
}
switch (a) {
+ case 0: // FM
+ Pico32x.regs[0] &= ~P32XS_FM;
+ Pico32x.regs[0] |= d & P32XS_FM;
+ break;
case 0x14: Pico32x.sh2irqs &= ~P32XI_VRES; goto irls;
case 0x16: Pico32x.sh2irqs &= ~P32XI_VINT; goto irls;
case 0x18: Pico32x.sh2irqs &= ~P32XI_HINT; goto irls;
- case 0x1a: Pico32x.sh2irqi[0] &= ~P32XI_CMD; goto irls;
- case 0x1c: Pico32x.sh2irqs &= ~P32XI_PWM; goto irls;
+ case 0x1a: Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_CMD; goto irls;
+ case 0x1c:
+ Pico32x.sh2irqs &= ~P32XI_PWM;
+ p32x_pwm_schedule_sh2(sh2);
+ goto irls;
}
- p32x_sh2reg_write8(a | 1, d);
+ p32x_sh2reg_write8(a | 1, d, sh2);
return;
irls:
- p32x_update_irls();
-}
-
-static u32 sh2_peripheral_read(u32 a)
-{
- u32 d;
- a &= 0x1fc;
- d = Pico32xMem->sh2_peri_regs[0][a / 4];
-
- elprintf(EL_32X, "sh2 peri r32 [%08x] %08x @%06x", a, d, ash2_pc());
- return d;
-}
-
-static void sh2_peripheral_write(u32 a, u32 d)
-{
- unsigned int *r = Pico32xMem->sh2_peri_regs[0];
- elprintf(EL_32X, "sh2 peri w32 [%08x] %08x @%06x", a, d, ash2_pc());
-
- a &= 0x1fc;
- r[a / 4] = d;
-
- 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, ash2_pc());
- dmac0->tcr0 &= 0xffffff;
- // 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();
- }
- }
+ p32x_update_irls(sh2, 0);
}
// ------------------------------------------------------------------
-// default 32x handlers
-u32 PicoRead8_32x(u32 a)
+// 32x 68k handlers
+
+// after ADEN
+static u32 PicoRead8_32x_on(u32 a)
{
u32 d = 0;
if ((a & 0xffc0) == 0x5100) { // a15100
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);
goto out_16to8;
}
-no_vdp:
if ((a & 0xfffc) == 0x30ec) { // a130ec
d = str_mars[a & 3];
goto out;
return d;
}
-u32 PicoRead16_32x(u32 a)
+static u32 PicoRead16_32x_on(u32 a)
{
u32 d = 0;
if ((a & 0xffc0) == 0x5100) { // a15100
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);
goto out;
}
-no_vdp:
if ((a & 0xfffc) == 0x30ec) { // a130ec
d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S';
goto 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);
return;
}
- if (!(Pico32x.regs[0] & 1))
- goto no_vdp;
-
- if ((a & 0xfff0) == 0x5180) { // a15180
- p32x_vdp_write8(a, d);
+ if ((a & 0xfc00) != 0x5000) {
+ PicoWrite8_io(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;
+ 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;
+ }
}
-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);
+ 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;
+ }
+ }
+
+ 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;
}
- if ((a & 0xfe00) == 0x5200) { // a15200
- Pico32xMem->pal[(a & 0x1ff) / 2] = d;
- Pico32x.dirty_pal = 1;
+ 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;
}
-no_vdp:
elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
}
+/* quirk: in both normal and overwrite areas only nonzero values go through */
+#define sh2_write8_dramN(n) \
+ if ((d & 0xff) != 0) { \
+ u8 *dram = (u8 *)Pico32xMem->dram[n]; \
+ dram[(a & 0x1ffff) ^ 1] = d; \
+ }
+
+static void m68k_write8_dram0_ow(u32 a, u32 d)
+{
+ sh2_write8_dramN(0);
+}
+
+static void m68k_write8_dram1_ow(u32 a, u32 d)
+{
+ sh2_write8_dramN(1);
+}
+
+#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 m68k_write16_dram0_ow(u32 a, u32 d)
+{
+ sh2_write16_dramN(0);
+}
+
+static void m68k_write16_dram1_ow(u32 a, u32 d)
+{
+ sh2_write16_dramN(1);
+}
+
+// -----------------------------------------------------------------
+
// hint vector is writeable
static void PicoWrite8_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;
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] = (unsigned long)Pico.rom + bank - 0x900000;
+#endif
}
// -----------------------------------------------------------------
// SH2
// -----------------------------------------------------------------
-u32 p32x_sh2_read8(u32 a)
+// read8
+static u32 sh2_read8_unmapped(u32 a, SH2 *sh2)
{
- int pd = 0;
- u32 d = 0;
-
- if (a < sizeof(Pico32xMem->sh2_rom_m))
- return Pico32xMem->sh2_rom_m[a ^ 1];
-
- if ((a & 0x0ffc0000) == 0x06000000)
- return Pico32xMem->sdram[(a & 0x3ffff) ^ 1];
+ elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x",
+ sh2->is_slave ? 's' : 'm', a, 0, sh2_pc(sh2));
+ return 0;
+}
- if ((a & 0x0fc00000) == 0x02000000)
- if ((a & 0x003fffff) < Pico.romsize)
- return Pico.rom[(a & 0x3fffff) ^ 1];
+static u32 sh2_read8_cs0(u32 a, SH2 *sh2)
+{
+ u32 d = 0;
- if ((a & 0x0fffff00) == 0x4000) {
- d = p32x_sh2reg_read16(a);
- pd = P32XF_MSH2POLL;
- goto out_pd;
+ // 0x3ff00 is veridied
+ if ((a & 0x3ff00) == 0x4000) {
+ d = p32x_sh2reg_read16(a, sh2);
+ goto out_16to8;
}
- if ((a & 0x0fffff00) == 0x4100) {
+ if ((a & 0x3ff00) == 0x4100) {
d = p32x_vdp_read16(a);
- pd = P32XF_MSH2VPOLL;
- goto out_pd;
+ sh2_poll_detect(sh2, a, SH2_STATE_VPOLL);
+ goto out_16to8;
}
- if ((a & 0x0fffff00) == 0x4200) {
+ // TODO: mirroring?
+ if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m))
+ return Pico32xMem->sh2_rom_m[a ^ 1];
+ if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s))
+ return Pico32xMem->sh2_rom_s[a ^ 1];
+
+ if ((a & 0x3fe00) == 0x4200) {
d = Pico32xMem->pal[(a & 0x1ff) / 2];
goto out_16to8;
}
- elprintf(EL_UIO, "sh2 unmapped r8 [%08x] %02x @%06x", a, d, ash2_pc());
- return d;
-
-out_pd:
- if (p32x_poll_detect(&msh2_poll, a, ash2_pc(), pd))
- ash2_end_run(8);
+ return sh2_read8_unmapped(a, sh2);
out_16to8:
if (a & 1)
else
d >>= 8;
- elprintf(EL_32X, "sh2 r8 [%08x] %02x @%06x", a, d, ash2_pc());
+ elprintf(EL_32X, "%csh2 r8 [%08x] %02x @%06x",
+ sh2->is_slave ? 's' : 'm', a, d, sh2_pc(sh2));
return d;
}
-u32 p32x_sh2_read16(u32 a)
+static u32 sh2_read8_da(u32 a, SH2 *sh2)
{
- int pd = 0;
- u32 d = 0;
-
- if (a < sizeof(Pico32xMem->sh2_rom_m))
- return *(u16 *)(Pico32xMem->sh2_rom_m + a);
+ return sh2->data_array[(a & 0xfff) ^ 1];
+}
- if ((a & 0x0ffc0000) == 0x06000000)
- return ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2];
+// read16
+static u32 sh2_read16_unmapped(u32 a, SH2 *sh2)
+{
+ elprintf(EL_UIO, "%csh2 unmapped r16 [%08x] %04x @%06x",
+ sh2->is_slave ? 's' : 'm', a, 0, sh2_pc(sh2));
+ return 0;
+}
- if ((a & 0x0fc00000) == 0x02000000)
- if ((a & 0x003fffff) < Pico.romsize)
- return ((u16 *)Pico.rom)[(a & 0x3fffff) / 2];
+static u32 sh2_read16_cs0(u32 a, SH2 *sh2)
+{
+ u32 d = 0;
- if ((a & 0x0fffff00) == 0x4000) {
- d = p32x_sh2reg_read16(a);
- pd = P32XF_MSH2POLL;
- goto out_pd;
+ if ((a & 0x3ff00) == 0x4000) {
+ d = p32x_sh2reg_read16(a, sh2);
+ if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM
+ return d;
+ goto out;
}
- if ((a & 0x0fffff00) == 0x4100) {
+ if ((a & 0x3ff00) == 0x4100) {
d = p32x_vdp_read16(a);
- pd = P32XF_MSH2VPOLL;
- goto out_pd;
+ sh2_poll_detect(sh2, a, SH2_STATE_VPOLL);
+ goto out;
}
- if ((a & 0x0fffff00) == 0x4200) {
+ if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m))
+ return *(u16 *)(Pico32xMem->sh2_rom_m + a);
+ if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s))
+ return *(u16 *)(Pico32xMem->sh2_rom_s + a);
+
+ if ((a & 0x3fe00) == 0x4200) {
d = Pico32xMem->pal[(a & 0x1ff) / 2];
goto out;
}
- elprintf(EL_UIO, "sh2 unmapped r16 [%08x] %04x @%06x", a, d, ash2_pc());
- return d;
-
-out_pd:
- if (p32x_poll_detect(&msh2_poll, a, ash2_pc(), pd))
- ash2_end_run(8);
+ return sh2_read16_unmapped(a, sh2);
out:
- elprintf(EL_32X, "sh2 r16 [%08x] %04x @%06x", a, d, ash2_pc());
+ elprintf(EL_32X, "%csh2 r16 [%08x] %04x @%06x",
+ sh2->is_slave ? 's' : 'm', a, d, sh2_pc(sh2));
return d;
}
-u32 p32x_sh2_read32(u32 a)
+static u32 sh2_read16_da(u32 a, SH2 *sh2)
{
- if ((a & 0xfffffe00) == 0xfffffe00)
- return sh2_peripheral_read(a);
+ return ((u16 *)sh2->data_array)[(a & 0xfff) / 2];
+}
-// elprintf(EL_UIO, "sh2 r32 [%08x] %08x @%06x", a, d, ash2_pc());
- return (p32x_sh2_read16(a) << 16) | p32x_sh2_read16(a + 2);
+// writes
+static void REGPARM(3) sh2_write_ignore(u32 a, u32 d, SH2 *sh2)
+{
}
-void p32x_sh2_write8(u32 a, u32 d)
+// write8
+static void REGPARM(3) sh2_write8_unmapped(u32 a, u32 d, SH2 *sh2)
{
- if ((a & 0x0ffffc00) == 0x4000)
- elprintf(EL_32X, "sh2 w8 [%08x] %02x @%06x", a, d & 0xff, ash2_pc());
+ elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x",
+ sh2->is_slave ? 's' : 'm', a, d & 0xff, sh2_pc(sh2));
+}
- if ((a & 0x0ffc0000) == 0x06000000) {
- Pico32xMem->sdram[(a & 0x3ffff) ^ 1] = d;
- return;
- }
+static void REGPARM(3) sh2_write8_cs0(u32 a, u32 d, SH2 *sh2)
+{
+ elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x",
+ sh2->is_slave ? 's' : 'm', a, d & 0xff, sh2_pc(sh2));
- if ((a & 0x0ffe0000) == 0x04000000) {
- u8 *dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
- dram[(a & 0x1ffff) ^ 1] = d;
- return;
+ if (Pico32x.regs[0] & P32XS_FM) {
+ if ((a & 0x3ff00) == 0x4100) {
+ sh2->poll_addr = 0;
+ p32x_vdp_write8(a, d);
+ return;
+ }
}
- if ((a & 0x0fffff00) == 0x4100) {
- p32x_vdp_write8(a, d);
+ if ((a & 0x3ff00) == 0x4000) {
+ p32x_sh2reg_write8(a, d, sh2);
return;
}
- if ((a & 0x0fffff00) == 0x4000) {
- p32x_sh2reg_write8(a, d);
- return;
- }
+ sh2_write8_unmapped(a, d, sh2);
+}
- elprintf(EL_UIO, "sh2 unmapped w8 [%08x] %02x @%06x", a, d & 0xff, ash2_pc());
+static void REGPARM(3) sh2_write8_dram0(u32 a, u32 d, SH2 *sh2)
+{
+ sh2_write8_dramN(0);
}
-void p32x_sh2_write16(u32 a, u32 d)
+static void REGPARM(3) sh2_write8_dram1(u32 a, u32 d, SH2 *sh2)
{
- if ((a & 0x0ffffc00) == 0x4000)
- elprintf(EL_32X, "sh2 w16 [%08x] %04x @%06x", a, d & 0xffff, ash2_pc());
+ sh2_write8_dramN(1);
+}
- if ((a & 0x0ffc0000) == 0x06000000) {
- ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2] = d;
- return;
- }
+static void REGPARM(3) sh2_write8_sdram(u32 a, u32 d, SH2 *sh2)
+{
+ 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, sh2->is_slave);
+#endif
+ Pico32xMem->sdram[a1 ^ 1] = d;
+}
- if ((a & 0x0ffe0000) == 0x04000000) {
- Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2] = d;
- return;
- }
+static void REGPARM(3) sh2_write8_da(u32 a, u32 d, SH2 *sh2)
+{
+ u32 a1 = a & 0xfff;
+#ifdef DRC_SH2
+ int id = sh2->is_slave;
+ int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT];
+ if (t)
+ sh2_drc_wcheck_da(a, t, id);
+#endif
+ sh2->data_array[a1 ^ 1] = d;
+}
- if ((a & 0x0fffff00) == 0x4100) {
- p32x_vdp_write16(a, d);
- return;
- }
+// write16
+static void REGPARM(3) sh2_write16_unmapped(u32 a, u32 d, SH2 *sh2)
+{
+ elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x",
+ sh2->is_slave ? 's' : 'm', a, d & 0xffff, sh2_pc(sh2));
+}
- if ((a & 0x0ffffe00) == 0x4200) {
- Pico32xMem->pal[(a & 0x1ff) / 2] = d;
- Pico32x.dirty_pal = 1;
- return;
+static void REGPARM(3) sh2_write16_cs0(u32 a, u32 d, SH2 *sh2)
+{
+ if (((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM
+ elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x",
+ sh2->is_slave ? 's' : 'm', a, d & 0xffff, sh2_pc(sh2));
+
+ if (Pico32x.regs[0] & P32XS_FM) {
+ if ((a & 0x3ff00) == 0x4100) {
+ sh2->poll_addr = 0;
+ p32x_vdp_write16(a, d, sh2);
+ return;
+ }
+
+ if ((a & 0x3fe00) == 0x4200) {
+ Pico32xMem->pal[(a & 0x1ff) / 2] = d;
+ Pico32x.dirty_pal = 1;
+ return;
+ }
}
- if ((a & 0x0fffff00) == 0x4000) {
- p32x_sh2reg_write16(a, d);
+ if ((a & 0x3ff00) == 0x4000) {
+ p32x_sh2reg_write16(a, d, sh2);
return;
}
- elprintf(EL_UIO, "sh2 unmapped w16 [%08x] %04x @%06x", a, d & 0xffff, ash2_pc());
+ sh2_write16_unmapped(a, d, sh2);
}
-void p32x_sh2_write32(u32 a, u32 d)
+static void REGPARM(3) sh2_write16_dram0(u32 a, u32 d, SH2 *sh2)
{
- if ((a & 0xfffffe00) == 0xfffffe00) {
- sh2_peripheral_write(a, d);
- return;
+ sh2_write16_dramN(0);
+}
+
+static void REGPARM(3) sh2_write16_dram1(u32 a, u32 d, SH2 *sh2)
+{
+ sh2_write16_dramN(1);
+}
+
+static void REGPARM(3) sh2_write16_sdram(u32 a, u32 d, SH2 *sh2)
+{
+ 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, sh2->is_slave);
+#endif
+ ((u16 *)Pico32xMem->sdram)[a1 / 2] = d;
+}
+
+static void REGPARM(3) sh2_write16_da(u32 a, u32 d, SH2 *sh2)
+{
+ u32 a1 = a & 0xfff;
+#ifdef DRC_SH2
+ int id = sh2->is_slave;
+ int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT];
+ if (t)
+ sh2_drc_wcheck_da(a, t, id);
+#endif
+ ((u16 *)sh2->data_array)[a1 / 2] = d;
+}
+
+
+typedef u32 (sh2_read_handler)(u32 a, SH2 *sh2);
+typedef void REGPARM(3) (sh2_write_handler)(u32 a, u32 d, SH2 *sh2);
+
+#define SH2MAP_ADDR2OFFS_R(a) \
+ ((u32)(a) >> SH2_READ_SHIFT)
+
+#define SH2MAP_ADDR2OFFS_W(a) \
+ ((u32)(a) >> SH2_WRITE_SHIFT)
+
+u32 REGPARM(2) p32x_sh2_read8(u32 a, SH2 *sh2)
+{
+ const sh2_memmap *sh2_map = sh2->read8_map;
+ uptr p;
+
+ sh2_map += SH2MAP_ADDR2OFFS_R(a);
+ p = sh2_map->addr;
+ if (map_flag_set(p))
+ return ((sh2_read_handler *)(p << 1))(a, sh2);
+ 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_R(a);
+ p = sh2_map->addr;
+ if (map_flag_set(p))
+ return ((sh2_read_handler *)(p << 1))(a, sh2);
+ else
+ return *(u16 *)((p << 1) + ((a & sh2_map->mask) & ~1));
+}
+
+u32 REGPARM(2) p32x_sh2_read32(u32 a, SH2 *sh2)
+{
+ const sh2_memmap *sh2_map = sh2->read16_map;
+ sh2_read_handler *handler;
+ u32 offs;
+ uptr p;
+
+ offs = SH2MAP_ADDR2OFFS_R(a);
+ sh2_map += offs;
+ p = sh2_map->addr;
+ if (!map_flag_set(p)) {
+ // XXX: maybe 32bit access instead with ror?
+ u16 *pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1));
+ return (pd[0] << 16) | pd[1];
}
-// elprintf(EL_UIO, "sh2 w32 [%08x] %08x @%06x", a, d, ash2_pc());
- p32x_sh2_write16(a, d >> 16);
- p32x_sh2_write16(a + 2, d);
+ if (offs == 0x1f)
+ return sh2_peripheral_read32(a, sh2);
+
+ handler = (sh2_read_handler *)(p << 1);
+ return (handler(a, sh2) << 16) | handler(a + 2, sh2);
}
-#define HWSWAP(x) (((x) << 16) | ((x) >> 16))
-void PicoMemSetup32x(void)
+void REGPARM(3) p32x_sh2_write8(u32 a, u32 d, SH2 *sh2)
{
- unsigned short *ps;
- unsigned int *pl;
- unsigned int rs;
- int i;
+ const void **sh2_wmap = sh2->write8_tab;
+ sh2_write_handler *wh;
- Pico32xMem = calloc(1, sizeof(*Pico32xMem));
- if (Pico32xMem == NULL) {
- elprintf(EL_STATUS, "OOM");
+ wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)];
+ wh(a, d, sh2);
+}
+
+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_W(a)];
+ wh(a, d, sh2);
+}
+
+void REGPARM(3) p32x_sh2_write32(u32 a, u32 d, SH2 *sh2)
+{
+ const void **sh2_wmap = sh2->write16_tab;
+ sh2_write_handler *wh;
+ u32 offs;
+
+ offs = SH2MAP_ADDR2OFFS_W(a);
+
+ if (offs == SH2MAP_ADDR2OFFS_W(0xffffc000)) {
+ sh2_peripheral_write32(a, d, sh2);
return;
}
- dmac0 = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4];
+ wh = sh2_wmap[offs];
+ wh(a, d >> 16, sh2);
+ wh(a + 2, d, sh2);
+}
+
+// -----------------------------------------------------------------
+
+static const u16 msh2_code[] = {
+ // trap instructions
+ 0xaffe, // bra <self>
+ 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
+};
- // 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);
+static const u16 ssh2_code[] = {
+ 0xaffe, // bra <self>
+ 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
+};
- // fill with nops
- for (i = 0xc0/2; i < 0x100/2; i++)
- ps[i] = 0x4e71;
+#define HWSWAP(x) (((u16)(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, sizeof(Pico32xMem->m68k_rom));
+ }
+ 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
+ ps[0xc0/2] = 0x46fc;
+ ps[0xc2/2] = 0x2700; // move #0x2700,sr
+ ps[0xfe/2] = 0x60fe; // jump to self
#else
- ps[0xfe/2] = 0x4e75; // rts
+ ps[0xfe/2] = 0x4e75; // rts
#endif
+ }
+ // fill remaining m68k_rom page with game ROM
+ memcpy(Pico32xMem->m68k_rom_bank + sizeof(Pico32xMem->m68k_rom),
+ Pico.rom + sizeof(Pico32xMem->m68k_rom),
+ sizeof(Pico32xMem->m68k_rom_bank) - sizeof(Pico32xMem->m68k_rom));
+
+ // 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 remaining mem with ROM
- memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100);
+ // fill exception vector table to our trap address
+ for (i = 0; i < 128; i++)
+ pl[i] = HWSWAP(0x200);
- // 32X ROM
- // TODO: move
- {
- FILE *f = fopen("32X_M_BIOS.BIN", "rb");
- int i;
- if (f == NULL) {
- printf("missing BIOS\n");
- exit(1);
- }
- fread(Pico32xMem->sh2_rom_m, 1, sizeof(Pico32xMem->sh2_rom_m), f);
- fclose(f);
- 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;
- }
+ // 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) | ((uptr)1 << (sizeof(uptr) * 8 - 1)) )
+
+static sh2_memmap sh2_read8_map[0x80], sh2_read16_map[0x80];
+// for writes we are using handlers only
+static sh2_write_handler *sh2_write8_map[0x80], *sh2_write16_map[0x80];
+
+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_read8_map, 0x860000, 0x87ffff, Pico32xMem->dram[b], 0);
+ cpu68k_map_set(m68k_read16_map, 0x860000, 0x87ffff, Pico32xMem->dram[b], 0);
+ cpu68k_map_set(m68k_write8_map, 0x840000, 0x87ffff,
+ b ? m68k_write8_dram1_ow : m68k_write8_dram0_ow, 1);
+ cpu68k_map_set(m68k_write16_map, 0x840000, 0x87ffff,
+ b ? m68k_write16_dram1_ow : m68k_write16_dram0_ow, 1);
+
+ // SH2
+ sh2_read8_map[0x04/2].addr = sh2_read8_map[0x24/2].addr =
+ sh2_read16_map[0x04/2].addr = sh2_read16_map[0x24/2].addr = MAP_MEMORY(Pico32xMem->dram[b]);
+
+ sh2_write8_map[0x04/2] = sh2_write8_map[0x24/2] = b ? sh2_write8_dram1 : sh2_write8_dram0;
+ sh2_write16_map[0x04/2] = sh2_write16_map[0x24/2] = b ? sh2_write16_dram1 : sh2_write16_dram0;
+}
+
+void PicoMemSetup32x(void)
+{
+ unsigned int rs;
+ int i;
+
+ Pico32xMem = plat_mmap(0x06000000, sizeof(*Pico32xMem), 0, 0);
+ if (Pico32xMem == NULL) {
+ elprintf(EL_STATUS, "OOM");
+ return;
}
+ get_bios();
+
// cartridge area becomes unmapped
// XXX: we take the easy way and don't unmap ROM,
// so that we can avoid handling the RV bit.
// m68k_map_unmap(0x000000, 0x3fffff);
// MD ROM area
- rs = sizeof(Pico32xMem->m68k_rom);
- cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0);
- cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0);
+ rs = sizeof(Pico32xMem->m68k_rom_bank);
+ cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0);
+ cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0);
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] = (unsigned long)Pico32xMem->m68k_rom;
+ for (rs = 0x88; rs < 0x90; rs++)
+ PicoCpuFM68k.Fetch[rs] = (unsigned long)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 < ARRAY_SIZE(sh2_read8_map); i++) {
+ sh2_read8_map[i].addr = MAP_HANDLER(sh2_read8_unmapped);
+ sh2_read16_map[i].addr = MAP_HANDLER(sh2_read16_unmapped);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(sh2_write8_map); i++) {
+ sh2_write8_map[i] = sh2_write8_unmapped;
+ sh2_write16_map[i] = sh2_write16_unmapped;
+ }
+
+ // "purge area"
+ for (i = 0x40; i <= 0x5f; i++) {
+ sh2_write8_map[i >> 1] =
+ sh2_write16_map[i >> 1] = sh2_write_ignore;
+ }
+
+ // CS0
+ sh2_read8_map[0x00/2].addr = sh2_read8_map[0x20/2].addr = MAP_HANDLER(sh2_read8_cs0);
+ sh2_read16_map[0x00/2].addr = sh2_read16_map[0x20/2].addr = MAP_HANDLER(sh2_read16_cs0);
+ sh2_write8_map[0x00/2] = sh2_write8_map[0x20/2] = sh2_write8_cs0;
+ sh2_write16_map[0x00/2] = sh2_write16_map[0x20/2] = sh2_write16_cs0;
+ // CS1 - ROM
+ sh2_read8_map[0x02/2].addr = sh2_read8_map[0x22/2].addr =
+ sh2_read16_map[0x02/2].addr = sh2_read16_map[0x22/2].addr = MAP_MEMORY(Pico.rom);
+ sh2_read8_map[0x02/2].mask = sh2_read8_map[0x22/2].mask =
+ sh2_read16_map[0x02/2].mask = sh2_read16_map[0x22/2].mask = 0x3fffff; // FIXME
+ // CS2 - DRAM - done by Pico32xSwapDRAM()
+ sh2_read8_map[0x04/2].mask = sh2_read8_map[0x24/2].mask =
+ sh2_read16_map[0x04/2].mask = sh2_read16_map[0x24/2].mask = 0x01ffff;
+ // CS3 - SDRAM
+ sh2_read8_map[0x06/2].addr = sh2_read8_map[0x26/2].addr =
+ sh2_read16_map[0x06/2].addr = sh2_read16_map[0x26/2].addr = MAP_MEMORY(Pico32xMem->sdram);
+ sh2_write8_map[0x06/2] = sh2_write8_map[0x26/2] = sh2_write8_sdram;
+ sh2_write16_map[0x06/2] = sh2_write16_map[0x26/2] = sh2_write16_sdram;
+ sh2_read8_map[0x06/2].mask = sh2_read8_map[0x26/2].mask =
+ sh2_read16_map[0x06/2].mask = sh2_read16_map[0x26/2].mask = 0x03ffff;
+ // SH2 data array
+ sh2_read8_map[0xc0/2].addr = MAP_HANDLER(sh2_read8_da);
+ sh2_read16_map[0xc0/2].addr = MAP_HANDLER(sh2_read16_da);
+ sh2_write8_map[0xc0/2] = sh2_write8_da;
+ sh2_write16_map[0xc0/2] = sh2_write16_da;
+ // SH2 IO
+ sh2_read8_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read8);
+ sh2_read16_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read16);
+ sh2_write8_map[0xff/2] = sh2_peripheral_write8;
+ sh2_write16_map[0xff/2] = 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 **)(void *)sh2_write8_map;
+ msh2.write16_tab = ssh2.write16_tab = (const void **)(void *)sh2_write16_map;
+
+ sh2_drc_mem_setup(&msh2);
+ sh2_drc_mem_setup(&ssh2);
+}
+
+void Pico32xMemStateLoaded(void)
+{
+ bank_switch(Pico32x.regs[4 / 2]);
+ Pico32xSwapDRAM((Pico32x.vdp_regs[0x0a / 2] & P32XV_FS) ^ P32XV_FS);
+ memset(Pico32xMem->pwm, 0, sizeof(Pico32xMem->pwm));
+ 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();
}
+// vim:shiftwidth=2:ts=2:expandtab
notaz.gp2x.de / picodrive.git / blobdiff