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- /*
- * 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 0 (16bit VRES clr) 4014
- * a15116 0 (16bit Vint clr) 4016
- * a15118 0 (16bit Hint clr) 4018
- * a1511a .......? .......C (16bit CMD clr) 401a // TV Cm
- * a1511c 0 (16bit PWM clr) 401c
- * a1511e 0 ? 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
- * cart 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);
- // addressing byte in 16bit reg
- #define REG8IN16(ptr, offs) ((u8 *)ptr)[(offs) ^ 1]
- // poll detection
- #define POLL_THRESHOLD 3
- static struct {
- u32 addr, cycles;
- int cnt;
- } m68k_poll;
- static int m68k_poll_detect(u32 a, u32 cycles, u32 flags)
- {
- int ret = 0;
- if (a - 2 <= m68k_poll.addr && m68k_poll.addr <= a + 2
- && cycles - m68k_poll.cycles <= 64 && !SekNotPolling)
- {
- 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 |= flags;
- }
- }
- else {
- m68k_poll.cnt = 0;
- m68k_poll.addr = a;
- SekNotPolling = 0;
- }
- m68k_poll.cycles = cycles;
- return ret;
- }
- 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 maxcnt)
- {
- int cycles_left = sh2_cycles_left(sh2);
- if (a == sh2->poll_addr && sh2->poll_cycles - cycles_left <= 10) {
- if (sh2->poll_cnt++ > maxcnt) {
- if (!(sh2->state & flags))
- elprintf_sh2(sh2, EL_32X, "state: %02x->%02x",
- 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_sh2_poll_event(SH2 *sh2, u32 flags, u32 m68k_cycles)
- {
- if (sh2->state & flags) {
- elprintf_sh2(sh2, EL_32X, "state: %02x->%02x", 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
- #ifdef FAKE_SH2
- static int p32x_csum_faked;
- static const u16 comm_fakevals[] = {
- 0x4d5f, 0x4f4b, // M_OK
- 0x535f, 0x4f4b, // S_OK
- 0x4D41, 0x5346, // MASF - Brutal Unleashed
- 0x5331, 0x4d31, // Darxide
- 0x5332, 0x4d32,
- 0x5333, 0x4d33,
- 0x0000, 0x0000, // eq for doom
- 0x0002, // Mortal Kombat
- // 0, // pad
- };
- static u32 sh2_comm_faker(u32 a)
- {
- static int f = 0;
- if (a == 0x28 && !p32x_csum_faked) {
- p32x_csum_faked = 1;
- return *(unsigned short *)(Pico.rom + 0x18e);
- }
- if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0]))
- f = 0;
- return comm_fakevals[f++];
- }
- #endif
- // ------------------------------------------------------------------
- // 68k regs
- static u32 p32x_reg_read16(u32 a)
- {
- a &= 0x3e;
- #if 0
- if ((a & 0x30) == 0x20)
- return sh2_comm_faker(a);
- #else
- if ((a & 0x30) == 0x20) {
- unsigned int cycles = SekCyclesDone();
- int comreg = 1 << (a & 0x0f) / 2;
- if (cycles - msh2.m68krcycles_done > 244
- || (Pico32x.comm_dirty_68k & comreg))
- 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);
- SekEndRun(16);
- }
- goto out;
- }
- #endif
- if (a == 2) { // INTM, INTS
- unsigned int cycles = SekCyclesDone();
- if (cycles - msh2.m68krcycles_done > 64)
- p32x_sync_sh2s(cycles);
- goto out;
- }
- if ((a & 0x30) == 0x30)
- return p32x_pwm_read16(a, NULL, SekCyclesDone());
- out:
- return Pico32x.regs[a / 2];
- }
- static void dreq0_write(u16 *r, u32 d)
- {
- if (!(r[6 / 2] & P32XS_68S)) {
- elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO w16 without 68S?");
- return; // ignored - tested
- }
- if (Pico32x.dmac0_fifo_ptr < DMAC_FIFO_LEN) {
- Pico32x.dmac_fifo[Pico32x.dmac0_fifo_ptr++] = d;
- if (Pico32x.dmac0_fifo_ptr == DMAC_FIFO_LEN)
- r[6 / 2] |= P32XS_FULL;
- // tested: len register decrements and 68S clears
- // even if SH2s/DMAC aren't active..
- r[0x10 / 2]--;
- if (r[0x10 / 2] == 0)
- r[6 / 2] &= ~P32XS_68S;
- if ((Pico32x.dmac0_fifo_ptr & 3) == 0) {
- p32x_sync_sh2s(SekCyclesDone());
- p32x_dreq0_trigger();
- }
- }
- else
- elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO overflow!");
- }
- // writable bits tested
- static void p32x_reg_write8(u32 a, u32 d)
- {
- u16 *r = Pico32x.regs;
- a &= 0x3f;
- // for things like bset on comm port
- m68k_poll.cnt = 0;
- switch (a) {
- case 0x00: // adapter ctl: FM writable
- REG8IN16(r, 0x00) = d & 0x80;
- return;
- case 0x01: // adapter ctl: RES and ADEN writable
- if ((d ^ r[0]) & d & P32XS_nRES)
- p32x_reset_sh2s();
- REG8IN16(r, 0x01) &= ~(P32XS_nRES|P32XS_ADEN);
- REG8IN16(r, 0x01) |= d & (P32XS_nRES|P32XS_ADEN);
- return;
- case 0x02: // ignored, always 0
- return;
- case 0x03: // irq ctl
- if ((d ^ r[0x02 / 2]) & 3) {
- int cycles = SekCyclesDone();
- p32x_sync_sh2s(cycles);
- r[0x02 / 2] = d & 3;
- p32x_update_cmd_irq(NULL, cycles);
- }
- return;
- case 0x04: // ignored, always 0
- return;
- case 0x05: // bank
- d &= 3;
- if (r[0x04 / 2] != d) {
- r[0x04 / 2] = d;
- bank_switch(d);
- }
- return;
- case 0x06: // ignored, always 0
- return;
- case 0x07: // DREQ ctl
- REG8IN16(r, 0x07) &= ~(P32XS_68S|P32XS_DMA|P32XS_RV);
- if (!(d & P32XS_68S)) {
- Pico32x.dmac0_fifo_ptr = 0;
- REG8IN16(r, 0x07) &= ~P32XS_FULL;
- }
- REG8IN16(r, 0x07) |= d & (P32XS_68S|P32XS_DMA|P32XS_RV);
- return;
- case 0x08: // ignored, always 0
- return;
- case 0x09: // DREQ src
- REG8IN16(r, 0x09) = d;
- return;
- case 0x0a:
- REG8IN16(r, 0x0a) = d;
- return;
- case 0x0b:
- REG8IN16(r, 0x0b) = d & 0xfe;
- return;
- case 0x0c: // ignored, always 0
- return;
- case 0x0d: // DREQ dest
- case 0x0e:
- case 0x0f:
- case 0x10: // DREQ len
- REG8IN16(r, a) = d;
- return;
- case 0x11:
- REG8IN16(r, a) = d & 0xfc;
- return;
- // DREQ FIFO - writes to odd addr go to fifo
- // do writes to even work? Reads return 0
- case 0x12:
- REG8IN16(r, a) = d;
- return;
- case 0x13:
- d = (REG8IN16(r, 0x12) << 8) | (d & 0xff);
- REG8IN16(r, 0x12) = 0;
- dreq0_write(r, d);
- return;
- case 0x14: // ignored, always 0
- case 0x15:
- case 0x16:
- case 0x17:
- case 0x18:
- case 0x19:
- return;
- case 0x1a: // what's this?
- elprintf(EL_32X|EL_ANOMALY, "mystery w8 %02x %02x", a, d);
- REG8IN16(r, a) = d & 0x01;
- return;
- case 0x1b: // TV
- REG8IN16(r, a) = d & 0x01;
- return;
- case 0x1c: // ignored, always 0
- case 0x1d:
- case 0x1e:
- case 0x1f:
- case 0x30:
- return;
- case 0x31: // PWM control
- REG8IN16(r, a) &= ~0x0f;
- REG8IN16(r, a) |= d & 0x0f;
- d = r[0x30 / 2];
- goto pwm_write;
- case 0x32: // PWM cycle
- REG8IN16(r, a) = d & 0x0f;
- d = r[0x32 / 2];
- goto pwm_write;
- case 0x33:
- REG8IN16(r, a) = d;
- d = r[0x32 / 2];
- goto pwm_write;
- // PWM pulse regs.. Only writes to odd address send a value
- // to FIFO; reads are 0 (except status bits)
- case 0x34:
- case 0x36:
- case 0x38:
- REG8IN16(r, a) = d;
- return;
- case 0x35:
- case 0x37:
- case 0x39:
- d = (REG8IN16(r, a ^ 1) << 8) | (d & 0xff);
- REG8IN16(r, a ^ 1) = 0;
- goto pwm_write;
- case 0x3a: // ignored, always 0
- case 0x3b:
- case 0x3c:
- case 0x3d:
- case 0x3e:
- case 0x3f:
- return;
- pwm_write:
- p32x_pwm_write16(a & ~1, d, NULL, SekCyclesDone());
- return;
- }
- if ((a & 0x30) == 0x20) {
- int cycles = SekCyclesDone();
- int comreg;
-
- if (REG8IN16(r, a) == d)
- return;
- comreg = 1 << (a & 0x0f) / 2;
- if (Pico32x.comm_dirty_68k & comreg)
- p32x_sync_sh2s(cycles);
- REG8IN16(r, a) = 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;
- }
- }
- static void p32x_reg_write16(u32 a, u32 d)
- {
- u16 *r = Pico32x.regs;
- a &= 0x3e;
- // for things like bset on comm port
- m68k_poll.cnt = 0;
- switch (a) {
- case 0x00: // adapter ctl
- if ((d ^ r[0]) & d & P32XS_nRES)
- p32x_reset_sh2s();
- r[0] &= ~(P32XS_FM|P32XS_nRES|P32XS_ADEN);
- r[0] |= d & (P32XS_FM|P32XS_nRES|P32XS_ADEN);
- return;
- case 0x08: // DREQ src
- r[a / 2] = d & 0xff;
- return;
- case 0x0a:
- r[a / 2] = d & ~1;
- return;
- case 0x0c: // DREQ dest
- r[a / 2] = d & 0xff;
- return;
- case 0x0e:
- r[a / 2] = d;
- return;
- case 0x10: // DREQ len
- r[a / 2] = d & ~3;
- return;
- case 0x12: // FIFO reg
- dreq0_write(r, d);
- return;
- case 0x1a: // TV + mystery bit
- r[a / 2] = d & 0x0101;
- return;
- case 0x30: // PWM control
- d = (r[a / 2] & ~0x0f) | (d & 0x0f);
- r[a / 2] = d;
- p32x_pwm_write16(a, d, NULL, SekCyclesDone());
- return;
- }
- // comm port
- if ((a & 0x30) == 0x20) {
- int cycles = SekCyclesDone();
- 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_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, SekCyclesDone());
- return;
- }
- p32x_reg_write8(a + 1, d);
- }
- // ------------------------------------------------------------------
- // VDP regs
- static u32 p32x_vdp_read16(u32 a)
- {
- u32 d;
- a &= 0x0e;
- d = Pico32x.vdp_regs[a / 2];
- if (a == 0x0a) {
- // tested: FEN seems to be randomly pulsing on hcnt 0x80-0xf0,
- // most often at 0xb1-0xb5, even during vblank,
- // what's the deal with that?
- // we'll just fake it along with hblank for now
- Pico32x.vdp_fbcr_fake++;
- if (Pico32x.vdp_fbcr_fake & 4)
- d |= P32XV_HBLK;
- if ((Pico32x.vdp_fbcr_fake & 7) == 0)
- d |= P32XV_nFEN;
- }
- return d;
- }
- static void p32x_vdp_write8(u32 a, u32 d)
- {
- u16 *r = Pico32x.vdp_regs;
- a &= 0x0f;
- // TODO: verify what's writeable
- switch (a) {
- case 0x01:
- // priority inversion is handled in palette
- if ((r[0] ^ d) & P32XV_PRI)
- 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] ^= 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, 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, SH2 *sh2)
- {
- u16 *r = Pico32x.regs;
- a &= 0x3e;
- switch (a) {
- case 0x00: // adapter/irq ctl
- 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, 3);
- sh2s_sync_on_read(sh2);
- return Pico32x.sh2_regs[4 / 2];
- case 0x06:
- return (r[a / 2] & ~P32XS_FULL) | 0x4000;
- case 0x08: // DREQ src
- case 0x0a:
- case 0x0c: // DREQ dst
- case 0x0e:
- case 0x10: // DREQ len
- return r[a / 2];
- case 0x12: // DREQ FIFO - does this work on hw?
- if (Pico32x.dmac0_fifo_ptr > 0) {
- Pico32x.dmac0_fifo_ptr--;
- r[a / 2] = Pico32x.dmac_fifo[0];
- memmove(&Pico32x.dmac_fifo[0], &Pico32x.dmac_fifo[1],
- Pico32x.dmac0_fifo_ptr * 2);
- }
- return r[a / 2];
- case 0x14:
- case 0x16:
- case 0x18:
- case 0x1a:
- case 0x1c:
- return 0; // ?
- }
- // 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, 3);
- sh2s_sync_on_read(sh2);
- return r[a / 2];
- }
- if ((a & 0x30) == 0x30)
- return p32x_pwm_read16(a, sh2, sh2_cycles_done_m68k(sh2));
- elprintf_sh2(sh2, EL_32X|EL_ANOMALY,
- "unhandled sysreg r16 [%02x] @%08x", a, sh2_pc(sh2));
- return 0;
- }
- static void p32x_sh2reg_write8(u32 a, u32 d, SH2 *sh2)
- {
- u16 *r = Pico32x.regs;
- u32 old;
- a &= 0x3f;
- sh2->poll_addr = 0;
- switch (a) {
- case 0x00: // FM
- r[0] &= ~P32XS_FM;
- r[0] |= (d << 8) & P32XS_FM;
- return;
- case 0x01: // HEN/irq masks
- old = Pico32x.sh2irq_mask[sh2->is_slave];
- if ((d ^ old) & 1)
- p32x_pwm_sync_to_sh2(sh2);
- Pico32x.sh2irq_mask[sh2->is_slave] = d & 0x0f;
- Pico32x.sh2_regs[0] &= ~0x80;
- Pico32x.sh2_regs[0] |= d & 0x80;
- if ((d ^ old) & 1)
- p32x_pwm_schedule_sh2(sh2);
- if ((old ^ d) & 2)
- p32x_update_cmd_irq(sh2, 0);
- if ((old ^ d) & 4)
- p32x_schedule_hint(sh2, 0);
- return;
- case 0x04: // ignored?
- return;
- case 0x05: // 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;
- case 0x30:
- REG8IN16(r, a) = d & 0x0f;
- d = r[0x30 / 2];
- goto pwm_write;
- case 0x31: // PWM control
- REG8IN16(r, a) = d & 0x8f;
- d = r[0x30 / 2];
- goto pwm_write;
- case 0x32: // PWM cycle
- REG8IN16(r, a) = d & 0x0f;
- d = r[0x32 / 2];
- goto pwm_write;
- case 0x33:
- REG8IN16(r, a) = d;
- d = r[0x32 / 2];
- goto pwm_write;
- // PWM pulse regs.. Only writes to odd address send a value
- // to FIFO; reads are 0 (except status bits)
- case 0x34:
- case 0x36:
- case 0x38:
- REG8IN16(r, a) = d;
- return;
- case 0x35:
- case 0x37:
- case 0x39:
- d = (REG8IN16(r, a ^ 1) << 8) | (d & 0xff);
- REG8IN16(r, a ^ 1) = 0;
- goto pwm_write;
- case 0x3a: // ignored, always 0?
- case 0x3b:
- case 0x3c:
- case 0x3d:
- case 0x3e:
- case 0x3f:
- return;
- pwm_write:
- p32x_pwm_write16(a & ~1, d, sh2, 0);
- return;
- }
- if ((a & 0x30) == 0x20) {
- int comreg;
- if (REG8IN16(r, a) == d)
- return;
- REG8IN16(r, a) = 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;
- }
- elprintf(EL_32X|EL_ANOMALY,
- "unhandled sysreg w8 [%02x] %02x @%08x", a, d, sh2_pc(sh2));
- }
- static void p32x_sh2reg_write16(u32 a, u32 d, SH2 *sh2)
- {
- a &= 0x3e;
- 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.sh2irqi[sh2->is_slave] &= ~P32XI_VINT;
- goto irls;
- case 0x18:
- Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_HINT;
- goto irls;
- case 0x1a:
- Pico32x.regs[2 / 2] &= ~(1 << sh2->is_slave);
- p32x_update_cmd_irq(sh2, 0);
- return;
- case 0x1c:
- p32x_pwm_sync_to_sh2(sh2);
- Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_PWM;
- p32x_pwm_schedule_sh2(sh2);
- goto irls;
- }
- p32x_sh2reg_write8(a | 1, d, sh2);
- return;
- irls:
- p32x_update_irls(sh2, 0);
- }
- // ------------------------------------------------------------------
- // 32x 68k handlers
- // after ADEN
- static u32 PicoRead8_32x_on(u32 a)
- {
- u32 d = 0;
- if ((a & 0xffc0) == 0x5100) { // a15100
- d = p32x_reg_read16(a);
- goto out_16to8;
- }
- if ((a & 0xfc00) != 0x5000) {
- if (PicoAHW & PAHW_MCD)
- return PicoRead8_mcd_io(a);
- else
- return PicoRead8_io(a);
- }
- if ((a & 0xfff0) == 0x5180) { // a15180
- d = p32x_vdp_read16(a);
- goto out_16to8;
- }
- if ((a & 0xfe00) == 0x5200) { // a15200
- d = Pico32xMem->pal[(a & 0x1ff) / 2];
- goto out_16to8;
- }
- 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_16to8:
- if (a & 1)
- d &= 0xff;
- else
- d >>= 8;
- out:
- elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc);
- return d;
- }
- static u32 PicoRead16_32x_on(u32 a)
- {
- u32 d = 0;
- if ((a & 0xffc0) == 0x5100) { // a15100
- d = p32x_reg_read16(a);
- goto out;
- }
- if ((a & 0xfc00) != 0x5000) {
- if (PicoAHW & PAHW_MCD)
- return PicoRead16_mcd_io(a);
- else
- return PicoRead16_io(a);
- }
- if ((a & 0xfff0) == 0x5180) { // a15180
- d = p32x_vdp_read16(a);
- goto out;
- }
- if ((a & 0xfe00) == 0x5200) { // a15200
- d = Pico32xMem->pal[(a & 0x1ff) / 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;
- }
- 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);
- if ((a & 0xffc0) == 0x5100) { // a15100
- p32x_reg_write8(a, d);
- return;
- }
- if ((a & 0xfc00) != 0x5000) {
- if (PicoAHW & PAHW_MCD)
- PicoWrite8_mcd_io(a, d);
- else
- PicoWrite8_io(a, d);
- if (a == 0xa130f1)
- bank_switch(Pico32x.regs[4 / 2]);
- 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;
- }
- }
- elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- }
- static void PicoWrite16_32x_on(u32 a, u32 d)
- {
- if ((a & 0xfc00) == 0x5000)
- 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 ((a & 0xfc00) != 0x5000) {
- if (PicoAHW & PAHW_MCD)
- PicoWrite16_mcd_io(a, d);
- else
- PicoWrite16_io(a, d);
- if (a == 0xa130f0)
- bank_switch(Pico32x.regs[4 / 2]);
- 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;
- }
- }
- 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);
- }
- /* 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)
- {
- if ((a & 0xfffc) == 0x0070) {
- Pico32xMem->m68k_rom[a ^ 1] = d;
- return;
- }
- elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x",
- a, d & 0xff, SekPc);
- }
- static void PicoWrite16_hint(u32 a, u32 d)
- {
- if ((a & 0xfffc) == 0x0070) {
- ((u16 *)Pico32xMem->m68k_rom)[a/2] = d;
- return;
- }
- elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x",
- a, d & 0xffff, SekPc);
- }
- // normally not writable, but somebody could make a RAM cart
- static void PicoWrite8_cart(u32 a, u32 d)
- {
- elprintf(EL_UIO, "m68k w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- a &= 0xfffff;
- m68k_write8(a, d);
- }
- static void PicoWrite16_cart(u32 a, u32 d)
- {
- elprintf(EL_UIO, "m68k w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
- a &= 0xfffff;
- m68k_write16(a, d);
- }
- // same with bank, but save ram is sometimes here
- static u32 PicoRead8_bank(u32 a)
- {
- a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
- return m68k_read8(a);
- }
- static u32 PicoRead16_bank(u32 a)
- {
- a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
- return m68k_read16(a);
- }
- static void PicoWrite8_bank(u32 a, u32 d)
- {
- if (!(Pico.m.sram_reg & SRR_MAPPED))
- elprintf(EL_UIO, "m68k w8 [%06x] %02x @%06x",
- a, d & 0xff, SekPc);
- a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
- m68k_write8(a, d);
- }
- static void PicoWrite16_bank(u32 a, u32 d)
- {
- if (!(Pico.m.sram_reg & SRR_MAPPED))
- elprintf(EL_UIO, "m68k w16 [%06x] %04x @%06x",
- a, d & 0xffff, SekPc);
- a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
- m68k_write16(a, d);
- }
- static void bank_map_handler(void)
- {
- cpu68k_map_set(m68k_read8_map, 0x900000, 0x9fffff, PicoRead8_bank, 1);
- cpu68k_map_set(m68k_read16_map, 0x900000, 0x9fffff, PicoRead16_bank, 1);
- }
- static void bank_switch(int b)
- {
- unsigned int rs, bank;
- if (Pico.m.ncart_in)
- return;
- bank = b << 20;
- if ((Pico.m.sram_reg & SRR_MAPPED) && bank == Pico.sv.start) {
- bank_map_handler();
- return;
- }
- if (bank >= Pico.romsize) {
- elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank);
- bank_map_handler();
- return;
- }
- // 32X ROM (unbanked, XXX: consider mirroring?)
- rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
- rs -= bank;
- if (rs > 0x100000)
- rs = 0x100000;
- cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
- 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);
- }
- // -----------------------------------------------------------------
- // SH2
- // -----------------------------------------------------------------
- // read8
- static u32 sh2_read8_unmapped(u32 a, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "unmapped r8 [%08x] %02x @%06x",
- a, 0, sh2_pc(sh2));
- return 0;
- }
- static u32 sh2_read8_cs0(u32 a, SH2 *sh2)
- {
- u32 d = 0;
- sh2_burn_cycles(sh2, 1*2);
- // 0x3ffc0 is veridied
- if ((a & 0x3ffc0) == 0x4000) {
- d = p32x_sh2reg_read16(a, sh2);
- goto out_16to8;
- }
- if ((a & 0x3fff0) == 0x4100) {
- d = p32x_vdp_read16(a);
- sh2_poll_detect(sh2, a, SH2_STATE_VPOLL, 7);
- goto out_16to8;
- }
- // TODO: mirroring?
- if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m))
- return Pico32xMem->sh2_rom_m.b[a ^ 1];
- if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s))
- return Pico32xMem->sh2_rom_s.b[a ^ 1];
- if ((a & 0x3fe00) == 0x4200) {
- d = Pico32xMem->pal[(a & 0x1ff) / 2];
- goto out_16to8;
- }
- return sh2_read8_unmapped(a, sh2);
- out_16to8:
- if (a & 1)
- d &= 0xff;
- else
- d >>= 8;
- elprintf_sh2(sh2, EL_32X, "r8 [%08x] %02x @%06x",
- a, d, sh2_pc(sh2));
- return d;
- }
- static u32 sh2_read8_da(u32 a, SH2 *sh2)
- {
- return sh2->data_array[(a & 0xfff) ^ 1];
- }
- // read16
- static u32 sh2_read16_unmapped(u32 a, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "unmapped r16 [%08x] %04x @%06x",
- a, 0, sh2_pc(sh2));
- return 0;
- }
- static u32 sh2_read16_cs0(u32 a, SH2 *sh2)
- {
- u32 d = 0;
- sh2_burn_cycles(sh2, 1*2);
- if ((a & 0x3ffc0) == 0x4000) {
- d = p32x_sh2reg_read16(a, sh2);
- if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM
- return d;
- goto out;
- }
- if ((a & 0x3fff0) == 0x4100) {
- d = p32x_vdp_read16(a);
- sh2_poll_detect(sh2, a, SH2_STATE_VPOLL, 7);
- goto out;
- }
- if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m))
- return Pico32xMem->sh2_rom_m.w[a / 2];
- if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s))
- return Pico32xMem->sh2_rom_s.w[a / 2];
- if ((a & 0x3fe00) == 0x4200) {
- d = Pico32xMem->pal[(a & 0x1ff) / 2];
- goto out;
- }
- return sh2_read16_unmapped(a, sh2);
- out:
- elprintf_sh2(sh2, EL_32X, "r16 [%08x] %04x @%06x",
- a, d, sh2_pc(sh2));
- return d;
- }
- static u32 sh2_read16_da(u32 a, SH2 *sh2)
- {
- return ((u16 *)sh2->data_array)[(a & 0xfff) / 2];
- }
- // writes
- static void REGPARM(3) sh2_write_ignore(u32 a, u32 d, SH2 *sh2)
- {
- }
- // write8
- static void REGPARM(3) sh2_write8_unmapped(u32 a, u32 d, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "unmapped w8 [%08x] %02x @%06x",
- a, d & 0xff, sh2_pc(sh2));
- }
- static void REGPARM(3) sh2_write8_cs0(u32 a, u32 d, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "w8 [%08x] %02x @%06x",
- a, d & 0xff, sh2_pc(sh2));
- if (Pico32x.regs[0] & P32XS_FM) {
- if ((a & 0x3fff0) == 0x4100) {
- sh2->poll_addr = 0;
- p32x_vdp_write8(a, d);
- return;
- }
- }
- if ((a & 0x3ffc0) == 0x4000) {
- p32x_sh2reg_write8(a, d, sh2);
- return;
- }
- sh2_write8_unmapped(a, d, sh2);
- }
- static void REGPARM(3) sh2_write8_dram0(u32 a, u32 d, SH2 *sh2)
- {
- sh2_write8_dramN(0);
- }
- static void REGPARM(3) sh2_write8_dram1(u32 a, u32 d, SH2 *sh2)
- {
- sh2_write8_dramN(1);
- }
- 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;
- }
- static void REGPARM(3) sh2_write8_sdram_wt(u32 a, u32 d, SH2 *sh2)
- {
- // xmen sync hack..
- if (a < 0x26000200)
- sh2_end_run(sh2, 32);
- sh2_write8_sdram(a, d, sh2);
- }
- 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;
- }
- // write16
- static void REGPARM(3) sh2_write16_unmapped(u32 a, u32 d, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "unmapped w16 [%08x] %04x @%06x",
- a, d & 0xffff, sh2_pc(sh2));
- }
- static void REGPARM(3) sh2_write16_cs0(u32 a, u32 d, SH2 *sh2)
- {
- if (((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM
- elprintf_sh2(sh2, EL_32X, "w16 [%08x] %04x @%06x",
- a, d & 0xffff, sh2_pc(sh2));
- if (Pico32x.regs[0] & P32XS_FM) {
- if ((a & 0x3fff0) == 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 & 0x3ffc0) == 0x4000) {
- p32x_sh2reg_write16(a, d, sh2);
- return;
- }
- sh2_write16_unmapped(a, d, sh2);
- }
- static void REGPARM(3) sh2_write16_dram0(u32 a, u32 d, SH2 *sh2)
- {
- 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];
- }
- if (offs == SH2MAP_ADDR2OFFS_R(0xffffc000))
- return sh2_peripheral_read32(a, sh2);
- handler = (sh2_read_handler *)(p << 1);
- return (handler(a, sh2) << 16) | handler(a + 2, sh2);
- }
- 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_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;
- }
- wh = sh2_wmap[offs];
- wh(a, d >> 16, sh2);
- wh(a + 2, d, sh2);
- }
- // -----------------------------------------------------------------
- static void z80_md_bank_write_32x(unsigned int a, unsigned char d)
- {
- unsigned int addr68k;
- addr68k = Pico.m.z80_bank68k << 15;
- addr68k += a & 0x7fff;
- if ((addr68k & 0xfff000) == 0xa15000)
- Pico32x.emu_flags |= P32XF_Z80_32X_IO;
- elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, d);
- m68k_write8(addr68k, d);
- }
- // -----------------------------------------------------------------
- static const u16 msh2_code[] = {
- // trap instructions
- 0xaffe, // 200 bra <self>
- 0x0009, // 202 nop
- // have to wait a bit until m68k initial program finishes clearing stuff
- // to avoid races with game SH2 code, like in Tempo
- 0xd406, // 204 mov.l @(_m_ok,pc), r4
- 0xc400, // 206 mov.b @(h'0,gbr),r0
- 0xc801, // 208 tst #1, r0
- 0x8b0f, // 20a bf cd_start
- 0xd105, // 20c mov.l @(_cnt,pc), r1
- 0xd206, // 20e mov.l @(_start,pc), r2
- 0x71ff, // 210 add #-1, r1
- 0x4115, // 212 cmp/pl r1
- 0x89fc, // 214 bt -2
- 0x6043, // 216 mov r4, r0
- 0xc208, // 218 mov.l r0, @(h'20,gbr)
- 0x6822, // 21a mov.l @r2, r8
- 0x482b, // 21c jmp @r8
- 0x0009, // 21e nop
- ('M'<<8)|'_', ('O'<<8)|'K', // 220 _m_ok
- 0x0001, 0x0000, // 224 _cnt
- 0x2200, 0x03e0, // master start pointer in ROM
- // cd_start:
- 0xd20d, // 22c mov.l @(__cd_,pc), r2
- 0xc608, // 22e mov.l @(h'20,gbr), r0
- 0x3200, // 230 cmp/eq r0, r2
- 0x8bfc, // 232 bf #-2
- 0xe000, // 234 mov #0, r0
- 0xcf80, // 236 or.b #0x80,@(r0,gbr)
- 0xd80b, // 238 mov.l @(_start_cd,pc), r8 // 24000018
- 0xd30c, // 23a mov.l @(_max_len,pc), r3
- 0x5b84, // 23c mov.l @(h'10,r8), r11 // master vbr
- 0x5a82, // 23e mov.l @(8,r8), r10 // entry
- 0x5081, // 240 mov.l @(4,r8), r0 // len
- 0x5980, // 242 mov.l @(0,r8), r9 // dst
- 0x3036, // 244 cmp/hi r3,r0
- 0x8b00, // 246 bf #1
- 0x6033, // 248 mov r3,r0
- 0x7820, // 24a add #0x20, r8
- // ipl_copy:
- 0x6286, // 24c mov.l @r8+, r2
- 0x2922, // 24e mov.l r2, @r9
- 0x7904, // 250 add #4, r9
- 0x70fc, // 252 add #-4, r0
- 0x8800, // 254 cmp/eq #0, r0
- 0x8bf9, // 256 bf #-5
- //
- 0x4b2e, // 258 ldc r11, vbr
- 0x6043, // 25a mov r4, r0 // M_OK
- 0xc208, // 25c mov.l r0, @(h'20,gbr)
- 0x4a2b, // 25e jmp @r10
- 0x0009, // 260 nop
- 0x0009, // 262 nop // pad
- ('_'<<8)|'C', ('D'<<8)|'_', // 264 __cd_
- 0x2400, 0x0018, // 268 _start_cd
- 0x0001, 0xffe0, // 26c _max_len
- };
- static const u16 ssh2_code[] = {
- 0xaffe, // 200 bra <self>
- 0x0009, // 202 nop
- // code to wait for master, in case authentic master BIOS is used
- 0xd106, // 204 mov.l @(_m_ok,pc), r1
- 0xd208, // 206 mov.l @(_start,pc), r2
- 0xc608, // 208 mov.l @(h'20,gbr), r0
- 0x3100, // 20a cmp/eq r0, r1
- 0x8bfc, // 20c bf #-2
- 0xc400, // 20e mov.b @(h'0,gbr),r0
- 0xc801, // 210 tst #1, r0
- 0xd004, // 212 mov.l @(_s_ok,pc), r0
- 0x8b0a, // 214 bf cd_start
- 0xc209, // 216 mov.l r0, @(h'24,gbr)
- 0x6822, // 218 mov.l @r2, r8
- 0x482b, // 21a jmp @r8
- 0x0009, // 21c nop
- 0x0009, // 21e nop
- ('M'<<8)|'_', ('O'<<8)|'K', // 220
- ('S'<<8)|'_', ('O'<<8)|'K', // 224
- 0x2200, 0x03e4, // slave start pointer in ROM
- // cd_start:
- 0xd803, // 22c mov.l @(_start_cd,pc), r8 // 24000018
- 0x5b85, // 22e mov.l @(h'14,r8), r11 // slave vbr
- 0x5a83, // 230 mov.l @(h'0c,r8), r10 // entry
- 0x4b2e, // 232 ldc r11, vbr
- 0xc209, // 234 mov.l r0, @(h'24,gbr) // write S_OK
- 0x4a2b, // 236 jmp @r10
- 0x0009, // 238 nop
- 0x0009, // 23a nop
- 0x2400, 0x0018, // 23c _start_cd
- };
- #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
- #else
- 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 exception vector table to our trap address
- for (i = 0; i < 128; i++)
- pl[i] = HWSWAP(0x200);
- // start
- pl[0] = pl[2] = HWSWAP(0x204);
- // reset SP
- pl[1] = pl[3] = HWSWAP(0x6040000);
- // startup code
- memcpy(&Pico32xMem->sh2_rom_m.b[0x200], msh2_code, sizeof(msh2_code));
- }
- // 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);
- // start
- pl[0] = pl[2] = HWSWAP(0x204);
- // reset SP
- pl[1] = pl[3] = HWSWAP(0x603f800);
- // startup code
- memcpy(&Pico32xMem->sh2_rom_s.b[0x200], ssh2_code, sizeof(ssh2_code));
- }
- }
- #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);
- if (!Pico.m.ncart_in) {
- // MD ROM area
- 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);
- // 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);
- cpu68k_map_set(m68k_write8_map, 0x880000, 0x880000 + rs - 1, PicoWrite8_cart, 1);
- cpu68k_map_set(m68k_write16_map, 0x880000, 0x880000 + rs - 1, PicoWrite16_cart, 1);
- #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);
- cpu68k_map_set(m68k_write8_map, 0x900000, 0x9fffff, PicoWrite8_bank, 1);
- cpu68k_map_set(m68k_write16_map, 0x900000, 0x9fffff, PicoWrite16_bank, 1);
- }
- // 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_sdram;
- sh2_write8_map[0x26/2] = sh2_write8_sdram_wt;
- 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);
- // z80 hack
- z80_map_set(z80_write_map, 0x8000, 0xffff, z80_md_bank_write_32x, 1);
- }
- 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
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