+/*
+ * SH2 addr lines:
+ * iii. .cc. ..xx * // Internal, Cs, x
+ *
+ * Register map:
+ * a15100 F....... R.....EA F.....AC N...VHMP 4000 // Fm Ren nrEs Aden Cart heN V H cMd Pwm
+ * a15102 ........ ......SM ? 4002 // intS intM
+ * a15104 ........ ......10 ........ hhhhhhhh 4004 // bk1 bk0 Hint
+ * a15106 F....... .....SDR UE...... .....SDR 4006 // Full 68S Dma Rv fUll[fb] Empt[fb]
+ * a15108 (32bit DREQ src) 4008
+ * a1510c (32bit DREQ dst) 400c
+ * a15110 llllllll llllll00 4010 // DREQ Len
+ * a15112 (16bit FIFO reg) 4012
+ * a15114 ? (16bit VRES clr) 4014
+ * a15116 ? (16bit Vint clr) 4016
+ * a15118 ? (16bit Hint clr) 4018
+ * a1511a ........ .......C (16bit CMD clr) 401a // Cm
+ * a1511c ? (16bit PWM clr) 401c
+ * a1511e ? ? 401e
+ * a15120 (16 bytes comm) 2020
+ * a15130 (PWM) 2030
+ */
#include "../pico_int.h"
#include "../memory.h"
+#ifdef DRC_SH2
+#include "../../cpu/sh2/compiler.h"
+#endif
+
+#if 0
+#undef ash2_end_run
+#undef SekEndRun
+#define ash2_end_run(x)
+#define SekEndRun(x)
+#endif
static const char str_mars[] = "MARS";
+void *p32x_bios_g, *p32x_bios_m, *p32x_bios_s;
struct Pico32xMem *Pico32xMem;
static void bank_switch(int b);
-#define MSB8(x) ((x) >> 8)
-
// poll detection
#define POLL_THRESHOLD 6
struct poll_det {
- int addr, pc, cnt, flag;
+ u32 addr, cycles, cyc_max;
+ int cnt, flag;
};
static struct poll_det m68k_poll, sh2_poll[2];
-static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 pc, int is_vdp)
+static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 cycles, int is_vdp)
{
int ret = 0, flag = pd->flag;
if (is_vdp)
flag <<= 3;
- if (a - 2 <= pd->addr && pd->addr <= a + 2 && pd->pc == pc) {
+ if (a - 2 <= pd->addr && pd->addr <= a + 2 && cycles - pd->cycles <= pd->cyc_max) {
pd->cnt++;
if (pd->cnt > POLL_THRESHOLD) {
if (!(Pico32x.emu_flags & flag)) {
- elprintf(EL_32X, "%s poll addr %08x @ %06x",
- flag == P32XF_68KPOLL ? "m68k" : (flag == P32XF_MSH2POLL ? "msh2" : "ssh2"), a, pc);
+ elprintf(EL_32X, "%s poll addr %08x, cyc %u",
+ flag & (P32XF_68KPOLL|P32XF_68KVPOLL) ? "m68k" :
+ (flag & (P32XF_MSH2POLL|P32XF_MSH2VPOLL) ? "msh2" : "ssh2"), a, cycles - pd->cycles);
ret = 1;
}
Pico32x.emu_flags |= flag;
}
}
- else
+ else {
pd->cnt = 0;
- pd->addr = a;
- pd->pc = pc;
+ pd->addr = a;
+ }
+ pd->cycles = cycles;
return ret;
}
{
int ret = 0, flag = pd->flag;
if (is_vdp)
- flag <<= 3;
- if (pd->cnt > POLL_THRESHOLD)
+ flag <<= 3; // VDP only
+ else
+ flag |= flag << 3; // both
+ if (Pico32x.emu_flags & flag) {
+ elprintf(EL_32X, "poll %02x -> %02x", Pico32x.emu_flags, Pico32x.emu_flags & ~flag);
ret = 1;
- pd->addr = pd->cnt = 0;
+ }
Pico32x.emu_flags &= ~flag;
+ pd->addr = pd->cnt = 0;
return ret;
}
-void p32x_poll_event(int is_vdp)
+void p32x_poll_event(int cpu_mask, int is_vdp)
{
- p32x_poll_undetect(&sh2_poll[0], is_vdp);
- p32x_poll_undetect(&sh2_poll[1], is_vdp);
+ if (cpu_mask & 1)
+ p32x_poll_undetect(&sh2_poll[0], is_vdp);
+ if (cpu_mask & 2)
+ p32x_poll_undetect(&sh2_poll[1], is_vdp);
}
// SH2 faking
if (dmac0->tcr0 != *dreqlen)
elprintf(EL_32X|EL_ANOMALY, "tcr0 and dreq len differ: %d != %d", dmac0->tcr0, *dreqlen);
+ // HACK: assume bus is busy and SH2 is halted
+ // XXX: use different mechanism for this, not poll det
+ Pico32x.emu_flags |= P32XF_MSH2POLL; // id ? P32XF_SSH2POLL : P32XF_MSH2POLL;
+
for (i = 0; i < Pico32x.dmac_ptr && dmac0->tcr0 > 0; i++) {
- extern void p32x_sh2_write16(u32 a, u32 d, int id);
- elprintf(EL_32X|EL_ANOMALY, "dmaw [%08x] %04x, left %d", dmac0->dar0, Pico32x.dmac_fifo[i], *dreqlen);
- p32x_sh2_write16(dmac0->dar0, Pico32x.dmac_fifo[i], 0);
+ elprintf(EL_32X, "dmaw [%08x] %04x, left %d", dmac0->dar0, Pico32x.dmac_fifo[i], *dreqlen);
+ p32x_sh2_write16(dmac0->dar0, Pico32x.dmac_fifo[i], &msh2);
dmac0->dar0 += 2;
dmac0->tcr0--;
(*dreqlen)--;
Pico32x.regs[6 / 2] &= ~P32XS_FULL;
if (*dreqlen == 0)
Pico32x.regs[6 / 2] &= ~P32XS_68S; // transfer complete
- if (dmac0->tcr0 == 0)
+ if (dmac0->tcr0 == 0) {
dmac0->chcr0 |= 2; // DMA has ended normally
+ p32x_poll_undetect(&sh2_poll[0], 0);
+ }
}
// ------------------------------------------------------------------
{
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 && p32x_poll_detect(&m68k_poll, a, SekPc, 0)) {
- SekEndRun(16);
+ if ((a & 0x30) == 0x20) {
+ // evil X-Men proto polls in a dbra loop and expects it to expire..
+ static u32 dr2 = 0;
+ if (SekDar(2) != dr2)
+ m68k_poll.cnt = 0;
+ dr2 = SekDar(2);
+
+ if (p32x_poll_detect(&m68k_poll, a, SekCyclesDoneT(), 0)) {
+ SekSetStop(1);
+ SekEndTimeslice(16);
+ }
+ dr2 = SekDar(2);
}
#endif
-#ifdef FAKE_SH2
- // fake only slave for now
- if (a == 0x24 || a == 0x26)
- return sh2_comm_faker(a);
-#endif
+
if ((a & 0x30) == 0x30)
return p32x_pwm_read16(a);
// for things like bset on comm port
m68k_poll.cnt = 0;
- if (a == 1 && !(r[0] & 1)) {
- r[0] |= 1;
- Pico32xStartup();
- return;
- }
-
- if (!(r[0] & 1))
- return;
-
switch (a) {
case 0: // adapter ctl
- r[0] = (r[0] & 0x83) | ((d << 8) & P32XS_FM);
- break;
+ r[0] = (r[0] & ~P32XS_FM) | ((d << 8) & P32XS_FM);
+ return;
+ case 1: // adapter ctl, RES bit writeable
+ if ((d ^ r[0]) & d & P32XS_nRES)
+ p32x_reset_sh2s();
+ r[0] = (r[0] & ~P32XS_nRES) | (d & P32XS_nRES);
+ return;
case 3: // irq ctl
if ((d & 1) && !(Pico32x.sh2irqi[0] & P32XI_CMD)) {
Pico32x.sh2irqi[0] |= P32XI_CMD;
p32x_update_irls();
+ SekEndRun(16);
}
if ((d & 2) && !(Pico32x.sh2irqi[1] & P32XI_CMD)) {
Pico32x.sh2irqi[1] |= P32XI_CMD;
p32x_update_irls();
+ SekEndRun(16);
}
- break;
+ return;
case 5: // bank
d &= 7;
if (r[4 / 2] != d) {
r[4 / 2] = d;
bank_switch(d);
}
- break;
+ return;
case 7: // DREQ ctl
r[6 / 2] = (r[6 / 2] & P32XS_FULL) | (d & (P32XS_68S|P32XS_DMA|P32XS_RV));
- break;
+ return;
+ case 0x1b: // TV
+ r[0x1a / 2] = d;
+ return;
+ }
+
+ if ((a & 0x30) == 0x20) {
+ u8 *r8 = (u8 *)r;
+ r8[a ^ 1] = d;
+ p32x_poll_undetect(&sh2_poll[0], 0);
+ p32x_poll_undetect(&sh2_poll[1], 0);
+ // if some SH2 is busy waiting, it needs to see the result ASAP
+ if (SekCyclesLeftNoMCD > 32)
+ SekEndRun(32);
+ return;
}
}
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;
// comm port
else if ((a & 0x30) == 0x20 && r[a / 2] != d) {
r[a / 2] = d;
- if (p32x_poll_undetect(&sh2_poll[0], 0) || p32x_poll_undetect(&sh2_poll[1], 0))
- // if some SH2 is busy waiting, it needs to see the result ASAP
- SekEndRun(16);
+ p32x_poll_undetect(&sh2_poll[0], 0);
+ p32x_poll_undetect(&sh2_poll[1], 0);
+ // same as for w8
+ if (SekCyclesLeftNoMCD > 32)
+ SekEndRun(32);
return;
}
// PWM
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;
static void p32x_vdp_write16(u32 a, u32 d)
{
+ a &= 0x0e;
+ if (a == 6) { // fill start
+ Pico32x.vdp_regs[6 / 2] = d;
+ return;
+ }
+ if (a == 8) { // fill data
+ u16 *dram = Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
+ int len = Pico32x.vdp_regs[4 / 2] + 1;
+ a = Pico32x.vdp_regs[6 / 2];
+ while (len--) {
+ dram[a] = d;
+ a = (a & 0xff00) | ((a + 1) & 0xff);
+ }
+ Pico32x.vdp_regs[6 / 2] = a;
+ Pico32x.vdp_regs[8 / 2] = d;
+ return;
+ }
+
p32x_vdp_write8(a | 1, d);
}
switch (a) {
case 0x00: // adapter/irq ctl
- return (r[0] & P32XS_FM) | P32XS2_ADEN | Pico32x.sh2irq_mask[cpuid];
+ 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);
+ 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, sh2_pc(cpuid), 0))
+ if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0))
ash2_end_run(8);
return r[a / 2];
}
static void p32x_sh2reg_write8(u32 a, u32 d, int cpuid)
{
a &= 0xff;
- if (a == 1) {
- Pico32x.sh2irq_mask[cpuid] = d & 0x0f;
- p32x_update_irls();
+ switch (a) {
+ case 0: // FM
+ Pico32x.regs[0] &= ~P32XS_FM;
+ Pico32x.regs[0] |= (d << 8) & P32XS_FM;
+ return;
+ case 1: //
+ Pico32x.sh2irq_mask[cpuid] = d & 0x8f;
+ Pico32x.sh2_regs[0] &= ~0x80;
+ Pico32x.sh2_regs[0] |= d & 0x80;
+ p32x_update_irls();
+ return;
+ case 5: // H count
+ Pico32x.sh2_regs[4 / 2] = d & 0xff;
+ p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
+ return;
+ }
+
+ if ((a & 0x30) == 0x20) {
+ u8 *r8 = (u8 *)Pico32x.regs;
+ r8[a ^ 1] = d;
+ if (p32x_poll_undetect(&m68k_poll, 0))
+ SekSetStop(0);
+ p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
+ return;
}
}
// comm
if ((a & 0x30) == 0x20 && Pico32x.regs[a/2] != d) {
Pico32x.regs[a / 2] = d;
- p32x_poll_undetect(&m68k_poll, 0);
+ if (p32x_poll_undetect(&m68k_poll, 0))
+ SekSetStop(0);
p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
return;
}
}
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[cpuid] &= ~P32XI_CMD; goto irls;
- case 0x1c: Pico32x.sh2irqs &= ~P32XI_PWM; goto irls;
+ case 0x1c:
+ Pico32x.sh2irqs &= ~P32XI_PWM;
+ p32x_timers_do(0);
+ goto irls;
}
p32x_sh2reg_write8(a | 1, d, cpuid);
p32x_update_irls();
}
-static u32 sh2_peripheral_read(u32 a, int id)
+// ------------------------------------------------------------------
+// SH2 internal peripherals
+// we keep them in little endian format
+static u32 sh2_peripheral_read8(u32 a, int id)
+{
+ u8 *r = (void *)Pico32xMem->sh2_peri_regs[id];
+ u32 d;
+
+ a &= 0x1ff;
+ d = PREG8(r, a);
+
+ elprintf(EL_32X, "%csh2 peri r8 [%08x] %02x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id));
+ return d;
+}
+
+static u32 sh2_peripheral_read16(u32 a, int id)
+{
+ u16 *r = (void *)Pico32xMem->sh2_peri_regs[id];
+ u32 d;
+
+ a &= 0x1ff;
+ d = r[(a / 2) ^ 1];
+
+ elprintf(EL_32X, "%csh2 peri r16 [%08x] %04x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id));
+ return d;
+}
+
+static u32 sh2_peripheral_read32(u32 a, int id)
{
u32 d;
a &= 0x1fc;
return d;
}
-static void sh2_peripheral_write(u32 a, u32 d, int id)
+static int REGPARM(3) sh2_peripheral_write8(u32 a, u32 d, int id)
+{
+ u8 *r = (void *)Pico32xMem->sh2_peri_regs[id];
+ elprintf(EL_32X, "%csh2 peri w8 [%08x] %02x @%06x", id ? 's' : 'm', a, d, sh2_pc(id));
+
+ a &= 0x1ff;
+ PREG8(r, a) = d;
+
+ // X-men SCI hack
+ if ((a == 2 && (d & 0x20)) || // transmiter enabled
+ (a == 4 && !(d & 0x80))) { // valid data in TDR
+ void *oregs = Pico32xMem->sh2_peri_regs[id ^ 1];
+ if ((PREG8(oregs, 2) & 0x50) == 0x50) { // receiver + irq enabled
+ int level = PREG8(oregs, 0x60) >> 4;
+ int vector = PREG8(oregs, 0x63) & 0x7f;
+ elprintf(EL_32X, "%csh2 SCI recv irq (%d, %d)", (id ^ 1) ? 's' : 'm', level, vector);
+ sh2_internal_irq(&sh2s[id ^ 1], level, vector);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int REGPARM(3) sh2_peripheral_write16(u32 a, u32 d, int id)
{
- unsigned int *r = Pico32xMem->sh2_peri_regs[id];
+ u16 *r = (void *)Pico32xMem->sh2_peri_regs[id];
+ elprintf(EL_32X, "%csh2 peri w16 [%08x] %04x @%06x", id ? 's' : 'm', a, d, sh2_pc(id));
+
+ a &= 0x1ff;
+
+ // evil WDT
+ if (a == 0x80) {
+ if ((d & 0xff00) == 0xa500) { // WTCSR
+ PREG8(r, 0x80) = d;
+ p32x_timers_recalc();
+ }
+ if ((d & 0xff00) == 0x5a00) // WTCNT
+ PREG8(r, 0x81) = d;
+ return 0;
+ }
+
+ r[(a / 2) ^ 1] = d;
+ return 0;
+}
+
+static void sh2_peripheral_write32(u32 a, u32 d, int id)
+{
+ u32 *r = Pico32xMem->sh2_peri_regs[id];
elprintf(EL_32X, "%csh2 peri w32 [%08x] %08x @%06x", id ? 's' : 'm', a, d, sh2_pc(id));
a &= 0x1fc;
r[a / 4] = d;
switch (a) {
- // division unit:
+ // division unit (TODO: verify):
case 0x104: // DVDNT: divident L, starts divide
elprintf(EL_32X, "%csh2 divide %08x / %08x", id ? 's' : 'm', d, r[0x100 / 4]);
if (r[0x100 / 4]) {
- r[0x118 / 4] = r[0x110 / 4] = d % r[0x100 / 4];
- r[0x11c / 4] = r[0x114 / 4] = d / r[0x100 / 4];
+ signed int divisor = r[0x100 / 4];
+ r[0x118 / 4] = r[0x110 / 4] = (signed int)d % divisor;
+ r[0x104 / 4] = r[0x11c / 4] = r[0x114 / 4] = (signed int)d / divisor;
}
+ else
+ r[0x110 / 4] = r[0x114 / 4] = r[0x118 / 4] = r[0x11c / 4] = 0; // ?
break;
case 0x114:
elprintf(EL_32X, "%csh2 divide %08x%08x / %08x @%08x",
id ? 's' : 'm', r[0x110 / 4], d, r[0x100 / 4], sh2_pc(id));
if (r[0x100 / 4]) {
- long long divident = (long long)r[0x110 / 4] << 32 | d;
+ signed long long divident = (signed long long)r[0x110 / 4] << 32 | d;
+ signed int divisor = r[0x100 / 4];
// XXX: undocumented mirroring to 0x118,0x11c?
- r[0x118 / 4] = r[0x110 / 4] = divident % r[0x100 / 4];
- r[0x11c / 4] = r[0x114 / 4] = divident / r[0x100 / 4];
+ r[0x118 / 4] = r[0x110 / 4] = divident % divisor;
+ divident /= divisor;
+ r[0x11c / 4] = r[0x114 / 4] = divident;
+ divident >>= 31;
+ if ((unsigned long long)divident + 1 > 1) {
+ //elprintf(EL_32X, "%csh2 divide overflow! @%08x", id ? 's' : 'm', sh2_pc(id));
+ r[0x11c / 4] = r[0x114 / 4] = divident > 0 ? 0x7fffffff : 0x80000000; // overflow
+ }
}
+ else
+ r[0x110 / 4] = r[0x114 / 4] = r[0x118 / 4] = r[0x11c / 4] = 0; // ?
break;
}
elprintf(EL_32X, "sh2 DMA %08x -> %08x, cnt %d, chcr %04x @%06x",
dmac0->sar0, dmac0->dar0, dmac0->tcr0, dmac0->chcr0, sh2_pc(id));
dmac0->tcr0 &= 0xffffff;
+
+ // HACK: assume 68k starts writing soon and end the timeslice
+ ash2_end_run(16);
+
// DREQ is only sent after first 4 words are written.
// we do multiple of 4 words to avoid messing up alignment
if (dmac0->sar0 == 0x20004012 && Pico32x.dmac_ptr && (Pico32x.dmac_ptr & 3) == 0) {
}
// ------------------------------------------------------------------
-// default 32x handlers
-u32 PicoRead8_32x(u32 a)
+// 32x handlers
+
+// after ADEN
+static u32 PicoRead8_32x_on(u32 a)
{
u32 d = 0;
if ((a & 0xffc0) == 0x5100) { // a15100
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 & 0xfc00) != 0x5000) {
+ PicoWrite8_io(a, d);
+ return;
+ }
if ((a & 0xfff0) == 0x5180) { // a15180
p32x_vdp_write8(a, d);
return;
}
-no_vdp:
elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
}
-void PicoWrite16_32x(u32 a, u32 d)
+static void PicoWrite16_32x_on(u32 a, u32 d)
{
if ((a & 0xfc00) == 0x5000)
- elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
+ elprintf(EL_32X, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
if ((a & 0xffc0) == 0x5100) { // a15100
p32x_reg_write16(a, d);
return;
}
- if (!(Pico32x.regs[0] & 1))
- goto no_vdp;
+ if ((a & 0xfc00) != 0x5000) {
+ PicoWrite16_io(a, d);
+ return;
+ }
if ((a & 0xfff0) == 0x5180) { // a15180
p32x_vdp_write16(a, d);
return;
}
-no_vdp:
elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
}
+// before ADEN
+u32 PicoRead8_32x(u32 a)
+{
+ u32 d = 0;
+ if ((a & 0xffc0) == 0x5100) { // a15100
+ // regs are always readable
+ d = ((u8 *)Pico32x.regs)[(a & 0x3f) ^ 1];
+ goto out;
+ }
+
+ if ((a & 0xfffc) == 0x30ec) { // a130ec
+ d = str_mars[a & 3];
+ goto out;
+ }
+
+ elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);
+ return d;
+
+out:
+ elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc);
+ return d;
+}
+
+u32 PicoRead16_32x(u32 a)
+{
+ u32 d = 0;
+ if ((a & 0xffc0) == 0x5100) { // a15100
+ d = Pico32x.regs[(a & 0x3f) / 2];
+ goto out;
+ }
+
+ if ((a & 0xfffc) == 0x30ec) { // a130ec
+ d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S';
+ goto out;
+ }
+
+ elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc);
+ return d;
+
+out:
+ elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc);
+ return d;
+}
+
+void PicoWrite8_32x(u32 a, u32 d)
+{
+ if ((a & 0xffc0) == 0x5100) { // a15100
+ u16 *r = Pico32x.regs;
+
+ elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
+ a &= 0x3f;
+ if (a == 1) {
+ if ((d ^ r[0]) & d & P32XS_ADEN) {
+ Pico32xStartup();
+ r[0] &= ~P32XS_nRES; // causes reset if specified by this write
+ r[0] |= P32XS_ADEN;
+ p32x_reg_write8(a, d); // forward for reset processing
+ }
+ return;
+ }
+
+ // allow only COMM for now
+ if ((a & 0x30) == 0x20) {
+ u8 *r8 = (u8 *)r;
+ r8[a ^ 1] = d;
+ }
+ return;
+ }
+
+ elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
+}
+
+void PicoWrite16_32x(u32 a, u32 d)
+{
+ if ((a & 0xffc0) == 0x5100) { // a15100
+ u16 *r = Pico32x.regs;
+
+ elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
+ a &= 0x3e;
+ if (a == 0) {
+ if ((d ^ r[0]) & d & P32XS_ADEN) {
+ Pico32xStartup();
+ r[0] &= ~P32XS_nRES; // causes reset if specified by this write
+ r[0] |= P32XS_ADEN;
+ p32x_reg_write16(a, d); // forward for reset processing
+ }
+ return;
+ }
+
+ // allow only COMM for now
+ if ((a & 0x30) == 0x20)
+ r[a / 2] = d;
+ return;
+ }
+
+ elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
+}
+
+// -----------------------------------------------------------------
+
// hint vector is writeable
static void PicoWrite8_hint(u32 a, u32 d)
{
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] = (u32)Pico.rom + bank - 0x900000;
+#endif
}
// -----------------------------------------------------------------
// SH2
// -----------------------------------------------------------------
-u32 p32x_sh2_read8(u32 a, int id)
+// read8
+static u32 sh2_read8_unmapped(u32 a, int id)
{
- u32 d = 0;
-
- if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m))
- return Pico32xMem->sh2_rom_m[a ^ 1];
- if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s))
- return Pico32xMem->sh2_rom_s[a ^ 1];
-
- if ((a & 0x0ffc0000) == 0x06000000)
- return Pico32xMem->sdram[(a & 0x3ffff) ^ 1];
-
- if ((a & 0x0fc00000) == 0x02000000)
- if ((a & 0x003fffff) < Pico.romsize)
- return Pico.rom[(a & 0x3fffff) ^ 1];
-
- if ((a & ~0xfff) == 0xc0000000)
- return Pico32xMem->data_array[id][(a & 0xfff) ^ 1];
+ elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x",
+ id ? 's' : 'm', a, 0, sh2_pc(id));
+ return 0;
+}
- if ((a & 0x0ffe0000) == 0x04000000) {
- u8 *dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
- return dram[(a & 0x1ffff) ^ 1];
- }
+static u32 sh2_read8_cs0(u32 a, int id)
+{
+ u32 d = 0;
- if ((a & 0x0fffff00) == 0x4000) {
+ // 0x3ff00 is veridied
+ if ((a & 0x3ff00) == 0x4000) {
d = p32x_sh2reg_read16(a, id);
goto out_16to8;
}
- if ((a & 0x0fffff00) == 0x4100) {
+ if ((a & 0x3ff00) == 0x4100) {
d = p32x_vdp_read16(a);
- if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), 1))
+ if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1))
ash2_end_run(8);
goto out_16to8;
}
- if ((a & 0x0fffff00) == 0x4200) {
+ // TODO: mirroring?
+ if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m))
+ return Pico32xMem->sh2_rom_m[a ^ 1];
+ if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s))
+ return Pico32xMem->sh2_rom_s[a ^ 1];
+
+ if ((a & 0x3ff00) == 0x4200) {
d = Pico32xMem->pal[(a & 0x1ff) / 2];
goto out_16to8;
}
- elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x",
- id ? 's' : 'm', a, d, sh2_pc(id));
- return d;
+ return sh2_read8_unmapped(a, id);
out_16to8:
if (a & 1)
return d;
}
-u32 p32x_sh2_read16(u32 a, int id)
+static u32 sh2_read8_da(u32 a, int id)
{
- u32 d = 0;
-
- if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m))
- return *(u16 *)(Pico32xMem->sh2_rom_m + a);
- if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s))
- return *(u16 *)(Pico32xMem->sh2_rom_s + a);
-
- if ((a & 0x0ffc0000) == 0x06000000)
- return ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2];
-
- if ((a & 0x0fc00000) == 0x02000000)
- if ((a & 0x003fffff) < Pico.romsize)
- return ((u16 *)Pico.rom)[(a & 0x3fffff) / 2];
+ return Pico32xMem->data_array[id][(a & 0xfff) ^ 1];
+}
- if ((a & ~0xfff) == 0xc0000000)
- return ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2];
+// read16
+static u32 sh2_read16_unmapped(u32 a, int id)
+{
+ elprintf(EL_UIO, "%csh2 unmapped r16 [%08x] %04x @%06x",
+ id ? 's' : 'm', a, 0, sh2_pc(id));
+ return 0;
+}
- if ((a & 0x0ffe0000) == 0x04000000)
- return Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2];
+static u32 sh2_read16_cs0(u32 a, int id)
+{
+ u32 d = 0;
- if ((a & 0x0fffff00) == 0x4000) {
+ if ((a & 0x3ff00) == 0x4000) {
d = p32x_sh2reg_read16(a, id);
+ if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM
+ return d;
goto out;
}
- if ((a & 0x0fffff00) == 0x4100) {
+ if ((a & 0x3ff00) == 0x4100) {
d = p32x_vdp_read16(a);
- if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), 1))
+ if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1))
ash2_end_run(8);
goto out;
}
- if ((a & 0x0fffff00) == 0x4200) {
+ if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m))
+ return *(u16 *)(Pico32xMem->sh2_rom_m + a);
+ if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s))
+ return *(u16 *)(Pico32xMem->sh2_rom_s + a);
+
+ if ((a & 0x3ff00) == 0x4200) {
d = Pico32xMem->pal[(a & 0x1ff) / 2];
goto out;
}
- elprintf(EL_UIO, "%csh2 unmapped r16 [%08x] %04x @%06x",
- id ? 's' : 'm', a, d, sh2_pc(id));
- return d;
+ return sh2_read16_unmapped(a, id);
out:
elprintf(EL_32X, "%csh2 r16 [%08x] %04x @%06x",
return d;
}
-u32 p32x_sh2_read32(u32 a, int id)
+static u32 sh2_read16_da(u32 a, int id)
{
- if ((a & 0xfffffe00) == 0xfffffe00)
- return sh2_peripheral_read(a, id);
-
-// elprintf(EL_UIO, "sh2 r32 [%08x] %08x @%06x", a, d, ash2_pc());
- return (p32x_sh2_read16(a, id) << 16) | p32x_sh2_read16(a + 2, id);
+ return ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2];
}
-void p32x_sh2_write8(u32 a, u32 d, int id)
+static int REGPARM(3) sh2_write_ignore(u32 a, u32 d, int id)
{
- if ((a & 0x0ffffc00) == 0x4000)
- elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x",
- id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
-
- if ((a & 0x0ffc0000) == 0x06000000) {
- Pico32xMem->sdram[(a & 0x3ffff) ^ 1] = d;
- return;
- }
+ return 0;
+}
- if ((a & 0x0ffe0000) == 0x04000000) {
- u8 *dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
- dram[(a & 0x1ffff) ^ 1] = d;
- return;
- }
+// write8
+static int REGPARM(3) sh2_write8_unmapped(u32 a, u32 d, int id)
+{
+ elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x",
+ id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
+ return 0;
+}
- if ((a & ~0xfff) == 0xc0000000) {
- Pico32xMem->data_array[id][(a & 0xfff) ^ 1] = d;
- return;
- }
+static int REGPARM(3) sh2_write8_cs0(u32 a, u32 d, int id)
+{
+ elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x",
+ id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
- if ((a & 0x0fffff00) == 0x4100) {
+ if ((a & 0x3ff00) == 0x4100) {
p32x_vdp_write8(a, d);
- return;
+ return 0;
}
- if ((a & 0x0fffff00) == 0x4000) {
+ if ((a & 0x3ff00) == 0x4000) {
p32x_sh2reg_write8(a, d, id);
- return;
+ return 1;
}
- elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x",
- id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
+ return sh2_write8_unmapped(a, d, id);
}
-void p32x_sh2_write16(u32 a, u32 d, int id)
+/* 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; \
+ } \
+ return 0;
+
+static int REGPARM(3) sh2_write8_dram0(u32 a, u32 d, int id)
{
- if ((a & 0x0ffffc00) == 0x4000)
- elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x",
- id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
+ sh2_write8_dramN(0);
+}
- if ((a & 0x0ffc0000) == 0x06000000) {
- ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2] = d;
- return;
- }
+static int REGPARM(3) sh2_write8_dram1(u32 a, u32 d, int id)
+{
+ sh2_write8_dramN(1);
+}
- if ((a & ~0xfff) == 0xc0000000) {
- ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2] = d;
- return;
- }
+static int REGPARM(3) sh2_write8_sdram(u32 a, u32 d, int id)
+{
+ u32 a1 = a & 0x3ffff;
+#ifdef DRC_SH2
+ int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT];
+ if (t)
+ sh2_drc_wcheck_ram(a, t, id);
+#endif
+ Pico32xMem->sdram[a1 ^ 1] = d;
+ return 0;
+}
- if ((a & 0x0ffe0000) == 0x04000000) {
- Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2] = d;
- return;
- }
+static int REGPARM(3) sh2_write8_da(u32 a, u32 d, int id)
+{
+ u32 a1 = a & 0xfff;
+#ifdef DRC_SH2
+ int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT];
+ if (t)
+ sh2_drc_wcheck_da(a, t, id);
+#endif
+ Pico32xMem->data_array[id][a1 ^ 1] = d;
+ return 0;
+}
+
+// write16
+static int REGPARM(3) sh2_write16_unmapped(u32 a, u32 d, int id)
+{
+ elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x",
+ id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
+ return 0;
+}
+
+static int REGPARM(3) sh2_write16_cs0(u32 a, u32 d, int id)
+{
+ if (((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM
+ elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x",
+ id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
- if ((a & 0x0fffff00) == 0x4100) {
+ if ((a & 0x3ff00) == 0x4100) {
+ sh2_poll[id].cnt = 0; // for poll before VDP accesses
p32x_vdp_write16(a, d);
- return;
+ return 0;
}
- if ((a & 0x0ffffe00) == 0x4200) {
+ if ((a & 0x3fe00) == 0x4200) {
Pico32xMem->pal[(a & 0x1ff) / 2] = d;
Pico32x.dirty_pal = 1;
- return;
+ return 0;
}
- if ((a & 0x0fffff00) == 0x4000) {
+ if ((a & 0x3ff00) == 0x4000) {
p32x_sh2reg_write16(a, d, id);
- return;
+ return 1;
}
- elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x",
- id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
+ return sh2_write16_unmapped(a, d, id);
}
-void p32x_sh2_write32(u32 a, u32 d, int id)
+#define sh2_write16_dramN(n) \
+ u16 *pd = &Pico32xMem->dram[n][(a & 0x1ffff) / 2]; \
+ if (!(a & 0x20000)) { \
+ *pd = d; \
+ return 0; \
+ } \
+ /* overwrite */ \
+ if (!(d & 0xff00)) d |= *pd & 0xff00; \
+ if (!(d & 0x00ff)) d |= *pd & 0x00ff; \
+ *pd = d; \
+ return 0
+
+static int REGPARM(3) sh2_write16_dram0(u32 a, u32 d, int id)
{
- if ((a & 0xfffffe00) == 0xfffffe00) {
- sh2_peripheral_write(a, d, id);
- return;
+ sh2_write16_dramN(0);
+}
+
+static int REGPARM(3) sh2_write16_dram1(u32 a, u32 d, int id)
+{
+ sh2_write16_dramN(1);
+}
+
+static int REGPARM(3) sh2_write16_sdram(u32 a, u32 d, int id)
+{
+ u32 a1 = a & 0x3ffff;
+#ifdef DRC_SH2
+ int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT];
+ if (t)
+ sh2_drc_wcheck_ram(a, t, id);
+#endif
+ ((u16 *)Pico32xMem->sdram)[a1 / 2] = d;
+ return 0;
+}
+
+static int REGPARM(3) sh2_write16_da(u32 a, u32 d, int id)
+{
+ u32 a1 = a & 0xfff;
+#ifdef DRC_SH2
+ int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT];
+ if (t)
+ sh2_drc_wcheck_da(a, t, id);
+#endif
+ ((u16 *)Pico32xMem->data_array[id])[a1 / 2] = d;
+ return 0;
+}
+
+
+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);
+
+#define SH2MAP_ADDR2OFFS_R(a) \
+ ((((a) >> 25) & 3) | (((a) >> 27) & 0x1c))
+
+#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->is_slave);
+ else
+ return *(u8 *)((p << 1) + ((a & sh2_map->mask) ^ 1));
+}
+
+u32 REGPARM(2) p32x_sh2_read16(u32 a, SH2 *sh2)
+{
+ const sh2_memmap *sh2_map = sh2->read16_map;
+ uptr p;
+
+ sh2_map += SH2MAP_ADDR2OFFS_R(a);
+ p = sh2_map->addr;
+ if (map_flag_set(p))
+ return ((sh2_read_handler *)(p << 1))(a, sh2->is_slave);
+ 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];
}
- p32x_sh2_write16(a, d >> 16, id);
- p32x_sh2_write16(a + 2, d, id);
+ if (offs == 0x1f)
+ return sh2_peripheral_read32(a, sh2->is_slave);
+
+ handler = (sh2_read_handler *)(p << 1);
+ return (handler(a, sh2->is_slave) << 16) | handler(a + 2, sh2->is_slave);
}
-#define HWSWAP(x) (((x) << 16) | ((x) >> 16))
-void PicoMemSetup32x(void)
+// return nonzero if write potentially causes an interrupt (used by drc)
+int 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");
- return;
+ wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)];
+ return wh(a, d, sh2->is_slave);
+}
+
+int 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)];
+ return wh(a, d, sh2->is_slave);
+}
+
+int REGPARM(3) p32x_sh2_write32(u32 a, u32 d, SH2 *sh2)
+{
+ const void **sh2_wmap = sh2->write16_tab;
+ sh2_write_handler *handler;
+ u32 offs;
+
+ offs = SH2MAP_ADDR2OFFS_W(a);
+
+ if (offs == SH2MAP_ADDR2OFFS_W(0xffffc000)) {
+ sh2_peripheral_write32(a, d, sh2->is_slave);
+ return 0;
}
- dmac0 = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4];
+ handler = sh2_wmap[offs];
+ handler(a, d >> 16, sh2->is_slave);
+ handler(a + 2, d, sh2->is_slave);
+ return 0;
+}
- // generate 68k ROM
- ps = (unsigned short *)Pico32xMem->m68k_rom;
- pl = (unsigned int *)Pico32xMem->m68k_rom;
- for (i = 1; i < 0xc0/4; i++)
- pl[i] = HWSWAP(0x880200 + (i - 1) * 6);
+// -----------------------------------------------------------------
- // fill with nops
- for (i = 0xc0/2; i < 0x100/2; i++)
- ps[i] = 0x4e71;
+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
+};
+
+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
+};
+
+#define HWSWAP(x) (((x) << 16) | ((x) >> 16))
+static void get_bios(void)
+{
+ u16 *ps;
+ u32 *pl;
+ int i;
+
+ // M68K ROM
+ if (p32x_bios_g != NULL) {
+ elprintf(EL_STATUS|EL_32X, "32x: using supplied 68k BIOS");
+ Byteswap(Pico32xMem->m68k_rom, p32x_bios_g, 0x100);
+ }
+ else {
+ // generate 68k ROM
+ ps = (u16 *)Pico32xMem->m68k_rom;
+ pl = (u32 *)ps;
+ for (i = 1; i < 0xc0/4; i++)
+ pl[i] = HWSWAP(0x880200 + (i - 1) * 6);
+
+ // fill with nops
+ for (i = 0xc0/2; i < 0x100/2; i++)
+ ps[i] = 0x4e71;
#if 0
- ps[0xc0/2] = 0x46fc;
- ps[0xc2/2] = 0x2700; // move #0x2700,sr
- ps[0xfe/2] = 0x60fe; // jump to self
+ 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 mem with ROM
+ }
+ // fill remaining m68k_rom page with game ROM
memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100);
- // 32X ROM
- // TODO: move
- {
- FILE *f = fopen("32X_M_BIOS.BIN", "rb");
- int i;
- if (f == NULL) {
- printf("missing 32X_M_BIOS.BIN\n");
- exit(1);
- }
- fread(Pico32xMem->sh2_rom_m, 1, sizeof(Pico32xMem->sh2_rom_m), f);
- fclose(f);
- f = fopen("32X_S_BIOS.BIN", "rb");
- if (f == NULL) {
- printf("missing 32X_S_BIOS.BIN\n");
- exit(1);
- }
- fread(Pico32xMem->sh2_rom_s, 1, sizeof(Pico32xMem->sh2_rom_s), f);
- fclose(f);
- // byteswap
- for (i = 0; i < sizeof(Pico32xMem->sh2_rom_m); i += 2) {
- int t = Pico32xMem->sh2_rom_m[i];
- Pico32xMem->sh2_rom_m[i] = Pico32xMem->sh2_rom_m[i + 1];
- Pico32xMem->sh2_rom_m[i + 1] = t;
- }
- for (i = 0; i < sizeof(Pico32xMem->sh2_rom_s); i += 2) {
- int t = Pico32xMem->sh2_rom_s[i];
- Pico32xMem->sh2_rom_s[i] = Pico32xMem->sh2_rom_s[i + 1];
- Pico32xMem->sh2_rom_s[i + 1] = t;
- }
+ // MSH2
+ if (p32x_bios_m != NULL) {
+ elprintf(EL_STATUS|EL_32X, "32x: using supplied master SH2 BIOS");
+ Byteswap(Pico32xMem->sh2_rom_m, p32x_bios_m, sizeof(Pico32xMem->sh2_rom_m));
+ }
+ else {
+ pl = (u32 *)Pico32xMem->sh2_rom_m;
+
+ // fill exception vector table to our trap address
+ for (i = 0; i < 128; i++)
+ pl[i] = HWSWAP(0x200);
+
+ // startup code
+ memcpy(Pico32xMem->sh2_rom_m + 0x200, msh2_code, sizeof(msh2_code));
+
+ // reset SP
+ pl[1] = pl[3] = HWSWAP(0x6040000);
+ // start
+ pl[0] = pl[2] = HWSWAP(0x204);
+ }
+
+ // SSH2
+ if (p32x_bios_s != NULL) {
+ elprintf(EL_STATUS|EL_32X, "32x: using supplied slave SH2 BIOS");
+ Byteswap(Pico32xMem->sh2_rom_s, p32x_bios_s, sizeof(Pico32xMem->sh2_rom_s));
+ }
+ else {
+ pl = (u32 *)Pico32xMem->sh2_rom_s;
+
+ // fill exception vector table to our trap address
+ for (i = 0; i < 128; i++)
+ pl[i] = HWSWAP(0x200);
+
+ // startup code
+ memcpy(Pico32xMem->sh2_rom_s + 0x200, ssh2_code, sizeof(ssh2_code));
+
+ // reset SP
+ pl[1] = pl[3] = HWSWAP(0x603f800);
+ // start
+ pl[0] = pl[2] = HWSWAP(0x204);
+ }
+}
+
+#define MAP_MEMORY(m) ((uptr)(m) >> 1)
+#define MAP_HANDLER(h) ( ((uptr)(h) >> 1) | ((uptr)1 << (sizeof(uptr) * 8 - 1)) )
+
+static sh2_memmap sh2_read8_map[0x20], sh2_read16_map[0x20];
+// 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_write8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
+ cpu68k_map_set(m68k_write16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
+
+ // SH2
+ sh2_read8_map[2].addr = sh2_read8_map[6].addr =
+ sh2_read16_map[2].addr = sh2_read16_map[6].addr = MAP_MEMORY(Pico32xMem->dram[b]);
+
+ sh2_write8_map[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));
+ if (Pico32xMem == NULL) {
+ elprintf(EL_STATUS, "OOM");
+ return;
}
+ dmac0 = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4];
+
+ 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.
cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify
cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1);
- // DRAM area
- Pico32xSwapDRAM(1);
-
// 32X ROM (unbanked, XXX: consider mirroring?)
rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
if (rs > 0x80000)
rs = 0x80000;
cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
+#ifdef EMU_F68K
+ // setup FAME fetchmap
+ PicoCpuFM68k.Fetch[0] = (u32)Pico32xMem->m68k_rom;
+ for (rs = 0x88; rs < 0x90; rs++)
+ PicoCpuFM68k.Fetch[rs] = (u32)Pico.rom - 0x880000;
+#endif
// 32X ROM (banked)
bank_switch(0);
+ // SYS regs
+ cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_32x_on, 1);
+ cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_32x_on, 1);
+ cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_32x_on, 1);
+ cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_32x_on, 1);
+
+ // SH2 maps: A31,A30,A29,CS1,CS0
+ // all unmapped by default
+ for (i = 0; i < 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[0].addr = sh2_read8_map[4].addr = MAP_HANDLER(sh2_read8_cs0);
+ sh2_read16_map[0].addr = sh2_read16_map[4].addr = MAP_HANDLER(sh2_read16_cs0);
+ sh2_write8_map[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[1].addr = sh2_read8_map[5].addr =
+ sh2_read16_map[1].addr = sh2_read16_map[5].addr = MAP_MEMORY(Pico.rom);
+ sh2_read8_map[1].mask = sh2_read8_map[5].mask =
+ sh2_read16_map[1].mask = sh2_read16_map[5].mask = 0x3fffff; // FIXME
+ // CS2 - DRAM - done by Pico32xSwapDRAM()
+ sh2_read8_map[2].mask = sh2_read8_map[6].mask =
+ sh2_read16_map[2].mask = sh2_read16_map[6].mask = 0x01ffff;
+ // CS3 - SDRAM
+ sh2_read8_map[3].addr = sh2_read8_map[7].addr =
+ sh2_read16_map[3].addr = sh2_read16_map[7].addr = MAP_MEMORY(Pico32xMem->sdram);
+ sh2_write8_map[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[3].mask = sh2_read8_map[7].mask =
+ sh2_read16_map[3].mask = sh2_read16_map[7].mask = 0x03ffff;
+ // SH2 data array
+ sh2_read8_map[0x18].addr = MAP_HANDLER(sh2_read8_da);
+ sh2_read16_map[0x18].addr = MAP_HANDLER(sh2_read16_da);
+ sh2_write8_map[0xc0/2] = sh2_write8_da;
+ sh2_write16_map[0xc0/2] = sh2_write16_da;
+ // SH2 IO
+ sh2_read8_map[0x1f].addr = MAP_HANDLER(sh2_peripheral_read8);
+ sh2_read16_map[0x1f].addr = MAP_HANDLER(sh2_peripheral_read16);
+ sh2_write8_map[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 **)sh2_write8_map;
+ msh2.write16_tab = ssh2.write16_tab = (const void **)sh2_write16_map;
+
// setup poll detector
m68k_poll.flag = P32XF_68KPOLL;
+ m68k_poll.cyc_max = 64;
sh2_poll[0].flag = P32XF_MSH2POLL;
+ sh2_poll[0].cyc_max = 21;
sh2_poll[1].flag = P32XF_SSH2POLL;
+ sh2_poll[1].cyc_max = 16;
}
+// vim:shiftwidth=2:expandtab
notaz.gp2x.de / picodrive.git / blobdiff