summaryrefslogtreecommitdiffstatshomepage
path: root/trunk/src/emu/cpu/sh4/sh4comn.c
diff options
context:
space:
mode:
Diffstat (limited to 'trunk/src/emu/cpu/sh4/sh4comn.c')
-rw-r--r--trunk/src/emu/cpu/sh4/sh4comn.c1287
1 files changed, 1287 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/sh4/sh4comn.c b/trunk/src/emu/cpu/sh4/sh4comn.c
new file mode 100644
index 00000000000..6b88909d26a
--- /dev/null
+++ b/trunk/src/emu/cpu/sh4/sh4comn.c
@@ -0,0 +1,1287 @@
+/*****************************************************************************
+ *
+ * sh4comn.c
+ *
+ * SH-4 non-specific components
+ *
+ *****************************************************************************/
+
+#include "emu.h"
+#include "debugger.h"
+#include "sh4.h"
+#include "sh4regs.h"
+#include "sh4comn.h"
+#include "sh3comn.h"
+#include "sh4tmu.h"
+#include "sh4dmac.h"
+
+static const int rtcnt_div[8] = { 0, 4, 16, 64, 256, 1024, 2048, 4096 };
+static const int daysmonth[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+
+
+
+static const UINT32 exception_priority_default[] = {
+ EXPPRI(1,1,0,0), /* Power-on Reset */
+ EXPPRI(1,2,0,1), /* Manual Reset */
+ EXPPRI(1,1,0,2), /* H-UDI Reset */
+ EXPPRI(1,3,0,3), /* Inst TLB Multiple Hit */
+ EXPPRI(1,4,0,4), /* Data TLB Multiple Hit */
+
+ EXPPRI(2,0,0,5), /* User break Before Instruction */
+ EXPPRI(2,1,0,6), /* Inst Address Error */
+ EXPPRI(2,2,0,7), /* Inst TLB Miss */
+ EXPPRI(2,3,0,8), /* Inst TLB Protection Violation */
+ EXPPRI(2,4,0,9), /* Illegal Instruction */
+ EXPPRI(2,4,0,10), /* Slot Illegal Instruction */
+ EXPPRI(2,4,0,11), /* FPU Disable */
+ EXPPRI(2,4,0,12), /* Slot FPU Disable */
+ EXPPRI(2,5,0,13), /* Data Address Error (Read) */
+ EXPPRI(2,5,0,14), /* Data Address Error (Write) */
+ EXPPRI(2,6,0,15), /* Data TBL Miss Read */
+ EXPPRI(2,6,0,16), /* Data TBL Miss Write */
+ EXPPRI(2,7,0,17), /* Data TBL Protection Violation Read */
+ EXPPRI(2,7,0,18), /* Data TBL Protection Violation Write */
+ EXPPRI(2,8,0,19), /* FPU Exception */
+ EXPPRI(2,9,0,20), /* Initial Page Write exception */
+
+ EXPPRI(2,4,0,21), /* Unconditional TRAP */
+ EXPPRI(2,10,0,22), /* User break After Instruction */
+
+ EXPPRI(3,0,16,SH4_INTC_NMI) /* NMI */
+ /* This is copied to a table, and the IRQ priorities filled in later */
+};
+
+static const int exception_codes[] =
+
+{ 0x000, /* Power-on Reset */
+ 0x020, /* Manual Reset */
+ 0x000, /* H-UDI Reset */
+ 0x140, /* Inst TLB Multiple Hit */
+ 0x140, /* Data TLB Multiple Hit */
+
+ 0x1E0, /* User break Before Instruction */
+ 0x0E0, /* Inst Address Error */
+ 0x040, /* Inst TLB Miss */
+ 0x0A0, /* Inst TLB Protection Violation */
+ 0x180, /* Illegal Instruction */
+ 0x1A0, /* Slot Illegal Instruction */
+ 0x800, /* FPU Disable */
+ 0x820, /* Slot FPU Disable */
+ 0x0E0, /* Data Address Error (Read) */
+ 0x100, /* Data Address Error (Write) */
+ 0x040, /* Data TBL Miss Read */
+ 0x060, /* Data TBL Miss Write */
+ 0x0A0, /* Data TBL Protection Violation Read */
+ 0x0C0, /* Data TBL Protection Violation Write */
+ 0x120, /* FPU Exception */
+ 0x080, /* Initial Page Write exception */
+
+ 0x160, /* Unconditional TRAP */
+ 0x1E0, /* User break After Instruction */
+
+ 0x1C0, /* NMI */ /* SH4_INTC_NMI=23 represents this location in this list.. */
+
+ 0x200, /* EX Irq 0 */
+ 0x220, /* 1 */
+ 0x240, /* 2 */
+ 0x260, /* 3 */
+ 0x280, /* 4 */
+ 0x2A0, /* 5 */
+ 0x2C0, /* 6 */
+ 0x2E0, /* 7 */
+ 0x300, /* 8 */
+ 0x320, /* 9 */
+ 0x340, /* A */
+ 0x360, /* B */
+ 0x380, /* C */
+ 0x3A0, /* D */
+ 0x3C0, /* E */
+
+ 0x240, /* SH4_INTC_IRL0 */
+ 0x2A0, /* SH4_INTC_IRL1 */
+ 0x300, /* SH4_INTC_IRL2 */
+ 0x360, /* SH4_INTC_IRL3 */
+
+ 0x600, /* HUDI */
+ 0x620, /* SH4_INTC_GPOI */
+ 0x640, /* SH4_INTC_DMTE0 */
+ 0x660, /* SH4_INTC_DMTE1 */
+ 0x680, /* SH4_INTC_DMTE2 */
+ 0x6A0, /* SH4_INTC_DMTE3 */
+
+ 0x780, /* SH4_INTC_DMTE4 */
+ 0x7A0, /* SH4_INTC_DMTE5 */
+ 0x7C0, /* SH4_INTC_DMTE6 */
+ 0x7E0, /* SH4_INTC_DMTE7 */
+
+ 0x6C0, /* SH4_INTC_DMAE */
+
+ 0xB00, /* SH4_INTC_TUNI3 */
+ 0xB80, /* SH4_INTC_TUNI4 */
+ 0x400, /* SH4_INTC_TUNI0 */
+ 0x420, /* SH4_INTC_TUNI1 */
+ 0x440, /* SH4_INTC_TUNI2 */
+ 0x460, /* SH4_INTC_TICPI2 */
+ 0x480, /* SH4_INTC_ATI */
+ 0x4A0, /* SH4_INTC_PRI */
+ 0x4C0, /* SH4_INTC_CUI */
+ 0x4E0, /* SH4_INTC_SCI1ERI */
+ 0x500, /* SH4_INTC_SCI1RXI */
+ 0x520, /* SH4_INTC_SCI1TXI */
+ 0x540, /* SH4_INTC_SCI1TEI */
+
+ 0x700, /* SH4_INTC_SCIFERI */
+ 0x720, /* SH4_INTC_SCIFRXI */
+ 0x740, /* SH4_INTC_SCIFBRI */
+ 0x760, /* SH4_INTC_SCIFTXI */
+ 0x560, /* SH4_INTC_ITI */
+ 0x580, /* SH4_INTC_RCMI */
+ 0x5A0 /* SH4_INTC_ROVI */
+};
+
+/* SH3 INTEVT2 uses a different table - values of -1 aren't filled in yet, some may not exist on the sh3. */
+/* The above table should differ too, some things depend on the interrupt level rather than beign fixed values */
+
+static const int sh3_intevt2_exception_codes[] =
+
+{ 0x000, /* Power-on Reset */
+ -1, /* Manual Reset */
+ -1, /* H-UDI Reset */
+ -1, /* Inst TLB Multiple Hit */
+ -1, /* Data TLB Multiple Hit */
+
+ -1, /* User break Before Instruction */
+ -1, /* Inst Address Error */
+ -1, /* Inst TLB Miss */
+ -1, /* Inst TLB Protection Violation */
+ -1, /* Illegal Instruction */
+ -1, /* Slot Illegal Instruction */
+ -1, /* FPU Disable */
+ -1, /* Slot FPU Disable */
+ -1, /* Data Address Error (Read) */
+ -1, /* Data Address Error (Write) */
+ -1, /* Data TBL Miss Read */
+ -1, /* Data TBL Miss Write */
+ -1, /* Data TBL Protection Violation Read */
+ -1, /* Data TBL Protection Violation Write */
+ -1, /* FPU Exception */
+ -1, /* Initial Page Write exception */
+
+ -1, /* Unconditional TRAP */
+ -1, /* User break After Instruction */
+
+ -1, /* NMI */ /* SH4_INTC_NMI=23 represents this location in this list.. */
+
+ -1, /* EX Irq 0 */
+ -1, /* 1 */
+ -1, /* 2 */
+ -1, /* 3 */
+ -1, /* 4 */
+ -1, /* 5 */
+ -1, /* 6 */
+ -1, /* 7 */
+ -1, /* 8 */
+ -1, /* 9 */
+ -1, /* A */
+ -1, /* B */
+ -1, /* C */
+ -1, /* D */
+ -1, /* E */
+
+ 0x600, /* SH4_INTC_IRL0 */
+ 0x620, /* SH4_INTC_IRL1 */
+ 0x640, /* SH4_INTC_IRL2 */
+ 0x660, /* SH4_INTC_IRL3 */
+ /* todo: SH3 should have lines 4+5 too? */
+
+ -1, /* HUDI */
+ -1, /* SH4_INTC_GPOI */
+ -1, /* SH4_INTC_DMTE0 */
+ -1, /* SH4_INTC_DMTE1 */
+ -1, /* SH4_INTC_DMTE2 */
+ -1, /* SH4_INTC_DMTE3 */
+
+ -1, /* SH4_INTC_DMTE4 */
+ -1, /* SH4_INTC_DMTE5 */
+ -1, /* SH4_INTC_DMTE6 */
+ -1, /* SH4_INTC_DMTE7 */
+
+ -1, /* SH4_INTC_DMAE */
+
+ -1, /* SH4_INTC_TUNI3 */
+ -1, /* SH4_INTC_TUNI4 */
+ 0x400, /* SH4_INTC_TUNI0 */
+ 0x420, /* SH4_INTC_TUNI1 */
+ 0x440, /* SH4_INTC_TUNI2 */
+ 0x460, /* SH4_INTC_TICPI2 */
+ -1, /* SH4_INTC_ATI */
+ -1, /* SH4_INTC_PRI */
+ -1, /* SH4_INTC_CUI */
+ -1, /* SH4_INTC_SCI1ERI */
+ -1, /* SH4_INTC_SCI1RXI */
+ -1, /* SH4_INTC_SCI1TXI */
+ -1, /* SH4_INTC_SCI1TEI */
+
+ -1, /* SH4_INTC_SCIFERI */
+ -1, /* SH4_INTC_SCIFRXI */
+ -1, /* SH4_INTC_SCIFBRI */
+ -1, /* SH4_INTC_SCIFTXI */
+ -1, /* SH4_INTC_ITI */
+ -1, /* SH4_INTC_RCMI */
+ -1 /* SH4_INTC_ROVI */
+};
+
+
+
+void sh4_change_register_bank(sh4_state *sh4, int to)
+{
+int s;
+
+ if (to) // 0 -> 1
+ {
+ for (s = 0;s < 8;s++)
+ {
+ sh4->rbnk[0][s] = sh4->r[s];
+ sh4->r[s] = sh4->rbnk[1][s];
+ }
+ }
+ else // 1 -> 0
+ {
+ for (s = 0;s < 8;s++)
+ {
+ sh4->rbnk[1][s] = sh4->r[s];
+ sh4->r[s] = sh4->rbnk[0][s];
+ }
+ }
+}
+
+void sh4_swap_fp_registers(sh4_state *sh4)
+{
+int s;
+UINT32 z;
+
+ for (s = 0;s <= 15;s++)
+ {
+ z = sh4->fr[s];
+ sh4->fr[s] = sh4->xf[s];
+ sh4->xf[s] = z;
+ }
+}
+
+#ifdef LSB_FIRST
+void sh4_swap_fp_couples(sh4_state *sh4)
+{
+int s;
+UINT32 z;
+
+ for (s = 0;s <= 15;s = s+2)
+ {
+ z = sh4->fr[s];
+ sh4->fr[s] = sh4->fr[s + 1];
+ sh4->fr[s + 1] = z;
+ z = sh4->xf[s];
+ sh4->xf[s] = sh4->xf[s + 1];
+ sh4->xf[s + 1] = z;
+ }
+}
+#endif
+
+void sh4_syncronize_register_bank(sh4_state *sh4, int to)
+{
+int s;
+
+ for (s = 0;s < 8;s++)
+ {
+ sh4->rbnk[to][s] = sh4->r[s];
+ }
+}
+
+void sh4_default_exception_priorities(sh4_state *sh4) // setup default priorities for exceptions
+{
+int a;
+
+ for (a=0;a <= SH4_INTC_NMI;a++)
+ sh4->exception_priority[a] = exception_priority_default[a];
+ for (a=SH4_INTC_IRLn0;a <= SH4_INTC_IRLnE;a++)
+ sh4->exception_priority[a] = INTPRI(15-(a-SH4_INTC_IRLn0), a);
+ sh4->exception_priority[SH4_INTC_IRL0] = INTPRI(13, SH4_INTC_IRL0);
+ sh4->exception_priority[SH4_INTC_IRL1] = INTPRI(10, SH4_INTC_IRL1);
+ sh4->exception_priority[SH4_INTC_IRL2] = INTPRI(7, SH4_INTC_IRL2);
+ sh4->exception_priority[SH4_INTC_IRL3] = INTPRI(4, SH4_INTC_IRL3);
+ for (a=SH4_INTC_HUDI;a <= SH4_INTC_ROVI;a++)
+ sh4->exception_priority[a] = INTPRI(0, a);
+}
+
+void sh4_exception_recompute(sh4_state *sh4) // checks if there is any interrupt with high enough priority
+{
+ int a,z;
+
+ sh4->test_irq = 0;
+ if ((!sh4->pending_irq) || ((sh4->sr & BL) && (sh4->exception_requesting[SH4_INTC_NMI] == 0)))
+ return;
+ z = (sh4->sr >> 4) & 15;
+ for (a=0;a <= SH4_INTC_ROVI;a++)
+ {
+ if (sh4->exception_requesting[a])
+ {
+ int pri = (((int)sh4->exception_priority[a] >> 8) & 255);
+ //logerror("pri is %02x z is %02x\n",pri,z);
+ if (pri > z)
+ {
+ //logerror("will test\n");
+ sh4->test_irq = 1; // will check for exception at end of instructions
+ break;
+ }
+ }
+ }
+}
+
+void sh4_exception_request(sh4_state *sh4, int exception) // start requesting an exception
+{
+ //logerror("sh4_exception_request a\n");
+ if (!sh4->exception_requesting[exception])
+ {
+ //logerror("sh4_exception_request b\n");
+ sh4->exception_requesting[exception] = 1;
+ sh4->pending_irq++;
+ sh4_exception_recompute(sh4);
+ }
+}
+
+void sh4_exception_unrequest(sh4_state *sh4, int exception) // stop requesting an exception
+{
+ if (sh4->exception_requesting[exception])
+ {
+ sh4->exception_requesting[exception] = 0;
+ sh4->pending_irq--;
+ sh4_exception_recompute(sh4);
+ }
+}
+
+void sh4_exception_checkunrequest(sh4_state *sh4, int exception)
+{
+ if (exception == SH4_INTC_NMI)
+ sh4_exception_unrequest(sh4, exception);
+ if ((exception == SH4_INTC_DMTE0) || (exception == SH4_INTC_DMTE1) ||
+ (exception == SH4_INTC_DMTE2) || (exception == SH4_INTC_DMTE3))
+ sh4_exception_unrequest(sh4, exception);
+}
+
+void sh4_exception(sh4_state *sh4, const char *message, int exception) // handle exception
+{
+ UINT32 vector;
+
+
+ if (sh4->cpu_type == CPU_TYPE_SH4)
+ {
+ if (exception < SH4_INTC_NMI)
+ return; // Not yet supported
+ if (exception == SH4_INTC_NMI) {
+ if ((sh4->sr & BL) && (!(sh4->m[ICR] & 0x200)))
+ return;
+
+ sh4->m[ICR] &= ~0x200;
+ sh4->m[INTEVT] = 0x1c0;
+
+
+ vector = 0x600;
+ sh4->irq_callback(sh4->device, INPUT_LINE_NMI);
+ LOG(("SH-4 '%s' nmi exception after [%s]\n", sh4->device->tag(), message));
+ } else {
+ // if ((sh4->m[ICR] & 0x4000) && (sh4->nmi_line_state == ASSERT_LINE))
+ // return;
+ if (sh4->sr & BL)
+ return;
+ if (((sh4->exception_priority[exception] >> 8) & 255) <= ((sh4->sr >> 4) & 15))
+ return;
+ sh4->m[INTEVT] = exception_codes[exception];
+ vector = 0x600;
+ if ((exception >= SH4_INTC_IRL0) && (exception <= SH4_INTC_IRL3))
+ sh4->irq_callback(sh4->device, SH4_INTC_IRL0-exception+SH4_IRL0);
+ else
+ sh4->irq_callback(sh4->device, SH4_IRL3+1);
+ LOG(("SH-4 '%s' interrupt exception #%d after [%s]\n", sh4->device->tag(), exception, message));
+ }
+ }
+ else /* SH3 exceptions */
+ {
+ /***** ASSUME THIS TO BE WRONG FOR NOW *****/
+
+ if (exception < SH4_INTC_NMI)
+ return; // Not yet supported
+ if (exception == SH4_INTC_NMI)
+ {
+ return;
+ }
+ else
+ {
+
+ if (sh4->sr & BL)
+ return;
+ if (((sh4->exception_priority[exception] >> 8) & 255) <= ((sh4->sr >> 4) & 15))
+ return;
+
+
+ vector = 0x600;
+
+ if ((exception >= SH4_INTC_IRL0) && (exception <= SH4_INTC_IRL3))
+ sh4->irq_callback(sh4->device, SH4_INTC_IRL0-exception+SH4_IRL0);
+ else
+ sh4->irq_callback(sh4->device, SH4_IRL3+1);
+
+ if (sh3_intevt2_exception_codes[exception]==-1)
+ fatalerror("sh3_intevt2_exception_codes unpopulated for exception %02x\n", exception);
+
+ sh4->m_sh3internal_lower[INTEVT2] = sh3_intevt2_exception_codes[exception];
+ sh4->m_sh3internal_upper[SH3_EXPEVT_ADDR] = exception_codes[exception];
+
+
+ LOG(("SH-3 '%s' interrupt exception #%d after [%s]\n", sh4->device->tag(), exception, message));
+ }
+
+ /***** END ASSUME THIS TO BE WRONG FOR NOW *****/
+ }
+ sh4_exception_checkunrequest(sh4, exception);
+
+ sh4->spc = sh4->pc;
+ sh4->ssr = sh4->sr;
+ sh4->sgr = sh4->r[15];
+
+ sh4->sr |= MD;
+ if ((sh4->device->machine().debug_flags & DEBUG_FLAG_ENABLED) != 0)
+ sh4_syncronize_register_bank(sh4, (sh4->sr & sRB) >> 29);
+ if (!(sh4->sr & sRB))
+ sh4_change_register_bank(sh4, 1);
+ sh4->sr |= sRB;
+ sh4->sr |= BL;
+ sh4_exception_recompute(sh4);
+
+ /* fetch PC */
+ sh4->pc = sh4->vbr + vector;
+ /* wake up if a sleep opcode is triggered */
+ if(sh4->sleep_mode == 1) { sh4->sleep_mode = 2; }
+}
+
+
+static UINT32 compute_ticks_refresh_timer(emu_timer *timer, int hertz, int base, int divisor)
+{
+ // elapsed:total = x : ticks
+ // x=elapsed*tics/total -> x=elapsed*(double)100000000/rtcnt_div[(sh4->m[RTCSR] >> 3) & 7]
+ // ticks/total=ticks / ((rtcnt_div[(sh4->m[RTCSR] >> 3) & 7] * ticks) / 100000000)=1/((rtcnt_div[(sh4->m[RTCSR] >> 3) & 7] / 100000000)=100000000/rtcnt_div[(sh4->m[RTCSR] >> 3) & 7]
+ return base + (UINT32)((timer->elapsed().as_double() * (double)hertz) / (double)divisor);
+}
+
+static void sh4_refresh_timer_recompute(sh4_state *sh4)
+{
+UINT32 ticks;
+
+ if (sh4->cpu_type != CPU_TYPE_SH4)
+ fatalerror("sh4_refresh_timer_recompute uses sh4->m[] with SH3\n");
+
+
+ //if rtcnt < rtcor then rtcor-rtcnt
+ //if rtcnt >= rtcor then 256-rtcnt+rtcor=256+rtcor-rtcnt
+ ticks = sh4->m[RTCOR]-sh4->m[RTCNT];
+ if (ticks <= 0)
+ ticks = 256 + ticks;
+ sh4->refresh_timer->adjust(attotime::from_hz(sh4->bus_clock) * rtcnt_div[(sh4->m[RTCSR] >> 3) & 7] * ticks);
+ sh4->refresh_timer_base = sh4->m[RTCNT];
+}
+
+
+static TIMER_CALLBACK( sh4_refresh_timer_callback )
+{
+ sh4_state *sh4 = (sh4_state *)ptr;
+
+ if (sh4->cpu_type != CPU_TYPE_SH4)
+ fatalerror("sh4_refresh_timer_callback uses sh4->m[] with SH3\n");
+
+ sh4->m[RTCNT] = 0;
+ sh4_refresh_timer_recompute(sh4);
+ sh4->m[RTCSR] |= 128;
+ if ((sh4->m[MCR] & 4) && !(sh4->m[MCR] & 2))
+ {
+ sh4->m[RFCR] = (sh4->m[RFCR] + 1) & 1023;
+ if (((sh4->m[RTCSR] & 1) && (sh4->m[RFCR] == 512)) || (sh4->m[RFCR] == 0))
+ {
+ sh4->m[RFCR] = 0;
+ sh4->m[RTCSR] |= 4;
+ }
+ }
+}
+
+static void increment_rtc_time(sh4_state *sh4, int mode)
+{
+ int carry, year, leap, days;
+
+ if (sh4->cpu_type != CPU_TYPE_SH4)
+ fatalerror("increment_rtc_time uses sh4->m[] with SH3\n");
+
+ if (mode == 0)
+ {
+ carry = 0;
+ sh4->m[RSECCNT] = sh4->m[RSECCNT] + 1;
+ if ((sh4->m[RSECCNT] & 0xf) == 0xa)
+ sh4->m[RSECCNT] = sh4->m[RSECCNT] + 6;
+ if (sh4->m[RSECCNT] == 0x60)
+ {
+ sh4->m[RSECCNT] = 0;
+ carry=1;
+ }
+ else
+ return;
+ }
+ else
+ carry = 1;
+
+ sh4->m[RMINCNT] = sh4->m[RMINCNT] + carry;
+ if ((sh4->m[RMINCNT] & 0xf) == 0xa)
+ sh4->m[RMINCNT] = sh4->m[RMINCNT] + 6;
+ carry=0;
+ if (sh4->m[RMINCNT] == 0x60)
+ {
+ sh4->m[RMINCNT] = 0;
+ carry = 1;
+ }
+
+ sh4->m[RHRCNT] = sh4->m[RHRCNT] + carry;
+ if ((sh4->m[RHRCNT] & 0xf) == 0xa)
+ sh4->m[RHRCNT] = sh4->m[RHRCNT] + 6;
+ carry = 0;
+ if (sh4->m[RHRCNT] == 0x24)
+ {
+ sh4->m[RHRCNT] = 0;
+ carry = 1;
+ }
+
+ sh4->m[RWKCNT] = sh4->m[RWKCNT] + carry;
+ if (sh4->m[RWKCNT] == 0x7)
+ {
+ sh4->m[RWKCNT] = 0;
+ }
+
+ days = 0;
+ year = (sh4->m[RYRCNT] & 0xf) + ((sh4->m[RYRCNT] & 0xf0) >> 4)*10 + ((sh4->m[RYRCNT] & 0xf00) >> 8)*100 + ((sh4->m[RYRCNT] & 0xf000) >> 12)*1000;
+ leap = 0;
+ if (!(year%100))
+ {
+ if (!(year%400))
+ leap = 1;
+ }
+ else if (!(year%4))
+ leap = 1;
+ if (sh4->m[RMONCNT] != 2)
+ leap = 0;
+ if (sh4->m[RMONCNT])
+ days = daysmonth[(sh4->m[RMONCNT] & 0xf) + ((sh4->m[RMONCNT] & 0xf0) >> 4)*10 - 1];
+
+ sh4->m[RDAYCNT] = sh4->m[RDAYCNT] + carry;
+ if ((sh4->m[RDAYCNT] & 0xf) == 0xa)
+ sh4->m[RDAYCNT] = sh4->m[RDAYCNT] + 6;
+ carry = 0;
+ if (sh4->m[RDAYCNT] > (days+leap))
+ {
+ sh4->m[RDAYCNT] = 1;
+ carry = 1;
+ }
+
+ sh4->m[RMONCNT] = sh4->m[RMONCNT] + carry;
+ if ((sh4->m[RMONCNT] & 0xf) == 0xa)
+ sh4->m[RMONCNT] = sh4->m[RMONCNT] + 6;
+ carry=0;
+ if (sh4->m[RMONCNT] == 0x13)
+ {
+ sh4->m[RMONCNT] = 1;
+ carry = 1;
+ }
+
+ sh4->m[RYRCNT] = sh4->m[RYRCNT] + carry;
+ if ((sh4->m[RYRCNT] & 0xf) >= 0xa)
+ sh4->m[RYRCNT] = sh4->m[RYRCNT] + 6;
+ if ((sh4->m[RYRCNT] & 0xf0) >= 0xa0)
+ sh4->m[RYRCNT] = sh4->m[RYRCNT] + 0x60;
+ if ((sh4->m[RYRCNT] & 0xf00) >= 0xa00)
+ sh4->m[RYRCNT] = sh4->m[RYRCNT] + 0x600;
+ if ((sh4->m[RYRCNT] & 0xf000) >= 0xa000)
+ sh4->m[RYRCNT] = 0;
+}
+
+static TIMER_CALLBACK( sh4_rtc_timer_callback )
+{
+ sh4_state *sh4 = (sh4_state *)ptr;
+
+ if (sh4->cpu_type != CPU_TYPE_SH4)
+ {
+ logerror("sh4_rtc_timer_callback uses sh4->m[] with SH3\n");
+ return;
+ }
+
+ sh4->rtc_timer->adjust(attotime::from_hz(128));
+ sh4->m[R64CNT] = (sh4->m[R64CNT]+1) & 0x7f;
+ if (sh4->m[R64CNT] == 64)
+ {
+ sh4->m[RCR1] |= 0x80;
+ increment_rtc_time(sh4, 0);
+ //sh4_exception_request(sh4, SH4_INTC_NMI); // TEST
+ }
+}
+
+
+static void sh4_dmac_nmi(sh4_state *sh4) // manage dma when nmi gets asserted
+{
+ int s;
+
+ sh4->SH4_DMAOR |= DMAOR_NMIF;
+ for (s = 0;s < 4;s++)
+ {
+ if (sh4->dma_timer_active[s])
+ {
+ logerror("SH4: DMA %d cancelled due to NMI but all data transferred", s);
+ sh4->dma_timer[s]->adjust(attotime::never, s);
+ sh4->dma_timer_active[s] = 0;
+ }
+ }
+}
+
+void sh4_handler_ipra_w(sh4_state *sh4, UINT32 data, UINT32 mem_mask)
+{
+ COMBINE_DATA(&sh4->SH4_IPRA);
+ /* 15 - 12 TMU0 */
+ /* 11 - 8 TMU1 */
+ /* 7 - 4 TMU2 */
+ /* 3 - 0 RTC */
+ sh4->exception_priority[SH4_INTC_ATI] = INTPRI(sh4->SH4_IPRA & 0x000f, SH4_INTC_ATI);
+ sh4->exception_priority[SH4_INTC_PRI] = INTPRI(sh4->SH4_IPRA & 0x000f, SH4_INTC_PRI);
+ sh4->exception_priority[SH4_INTC_CUI] = INTPRI(sh4->SH4_IPRA & 0x000f, SH4_INTC_CUI);
+
+ sh4->exception_priority[SH4_INTC_TUNI2] = INTPRI((sh4->SH4_IPRA & 0x00f0) >> 4, SH4_INTC_TUNI2);
+ sh4->exception_priority[SH4_INTC_TICPI2] = INTPRI((sh4->SH4_IPRA & 0x00f0) >> 4, SH4_INTC_TICPI2);
+
+ sh4->exception_priority[SH4_INTC_TUNI1] = INTPRI((sh4->SH4_IPRA & 0x0f00) >> 8, SH4_INTC_TUNI1);
+
+ sh4->exception_priority[SH4_INTC_TUNI0] = INTPRI((sh4->SH4_IPRA & 0xf000) >> 12, SH4_INTC_TUNI0);
+
+ logerror("setting priorities TMU0 %01x TMU1 %01x TMU2 %01x RTC %01x\n", (sh4->SH4_IPRA & 0xf000)>>12, (sh4->SH4_IPRA & 0x0f00)>>8, (sh4->SH4_IPRA & 0x00f0)>>4, (sh4->SH4_IPRA & 0x000f)>>0);
+
+ sh4_exception_recompute(sh4);
+}
+
+
+WRITE32_HANDLER( sh4_internal_w )
+{
+ sh4_state *sh4 = get_safe_token(&space->device());
+ int a;
+ UINT32 addr = (offset << 2) + 0xfe000000;
+ offset = ((addr & 0xfc) >> 2) | ((addr & 0x1fe0000) >> 11);
+
+ if (sh4->cpu_type != CPU_TYPE_SH4)
+ fatalerror("sh4_internal_w uses sh4->m[] with SH3\n");
+
+ UINT32 old = sh4->m[offset];
+ COMBINE_DATA(sh4->m+offset);
+
+// printf("sh4_internal_w: Write %08x (%x), %08x @ %08x\n", 0xfe000000+((offset & 0x3fc0) << 11)+((offset & 0x3f) << 2), offset, data, mem_mask);
+
+ switch( offset )
+ {
+ case MMUCR: // MMU Control
+ if (data & MMUCR_AT)
+ {
+ printf("SH4 MMU Enabled\n");
+ printf("If you're seeing this, but running something other than a Naomi GD-ROM game then chances are it won't work\n");
+ printf("The MMU emulation is a hack specific to that system\n");
+ sh4->sh4_mmu_enabled = 1;
+
+ // should be a different bit!
+ {
+ int i;
+ for (i=0;i<64;i++)
+ {
+ sh4->sh4_tlb_address[i] = 0;
+ sh4->sh4_tlb_data[i] = 0;
+ }
+
+ }
+ }
+ else
+ {
+ sh4->sh4_mmu_enabled = 0;
+ }
+
+ break;
+
+ // Memory refresh
+ case RTCSR:
+ sh4->m[RTCSR] &= 255;
+ if ((old >> 3) & 7)
+ sh4->m[RTCNT] = compute_ticks_refresh_timer(sh4->refresh_timer, sh4->bus_clock, sh4->refresh_timer_base, rtcnt_div[(old >> 3) & 7]) & 0xff;
+ if ((sh4->m[RTCSR] >> 3) & 7)
+ { // activated
+ sh4_refresh_timer_recompute(sh4);
+ }
+ else
+ {
+ sh4->refresh_timer->adjust(attotime::never);
+ }
+ break;
+
+ case RTCNT:
+ sh4->m[RTCNT] &= 255;
+ if ((sh4->m[RTCSR] >> 3) & 7)
+ { // active
+ sh4_refresh_timer_recompute(sh4);
+ }
+ break;
+
+ case RTCOR:
+ sh4->m[RTCOR] &= 255;
+ if ((sh4->m[RTCSR] >> 3) & 7)
+ { // active
+ sh4->m[RTCNT] = compute_ticks_refresh_timer(sh4->refresh_timer, sh4->bus_clock, sh4->refresh_timer_base, rtcnt_div[(sh4->m[RTCSR] >> 3) & 7]) & 0xff;
+ sh4_refresh_timer_recompute(sh4);
+ }
+ break;
+
+ case RFCR:
+ sh4->m[RFCR] &= 1023;
+ break;
+
+ // RTC
+ case RCR1:
+ if ((sh4->m[RCR1] & 8) && (~old & 8)) // 0 -> 1
+ sh4->m[RCR1] ^= 1;
+ break;
+
+ case RCR2:
+ if (sh4->m[RCR2] & 2)
+ {
+ sh4->m[R64CNT] = 0;
+ sh4->m[RCR2] ^= 2;
+ }
+ if (sh4->m[RCR2] & 4)
+ {
+ sh4->m[R64CNT] = 0;
+ if (sh4->m[RSECCNT] >= 30)
+ increment_rtc_time(sh4, 1);
+ sh4->m[RSECCNT] = 0;
+ }
+ if ((sh4->m[RCR2] & 8) && (~old & 8))
+ { // 0 -> 1
+ sh4->rtc_timer->adjust(attotime::from_hz(128));
+ }
+ else if (~(sh4->m[RCR2]) & 8)
+ { // 0
+ sh4->rtc_timer->adjust(attotime::never);
+ }
+ break;
+
+/*********************************************************************************************************************
+ TMU (Timer Unit)
+*********************************************************************************************************************/
+ case SH4_TSTR_ADDR: sh4_handle_tstr_addr_w(sh4,data,mem_mask); break;
+ case SH4_TCR0_ADDR: sh4_handle_tcr0_addr_w(sh4,data,mem_mask); break;
+ case SH4_TCR1_ADDR: sh4_handle_tcr1_addr_w(sh4,data,mem_mask); break;
+ case SH4_TCR2_ADDR: sh4_handle_tcr2_addr_w(sh4,data,mem_mask); break;
+ case SH4_TCOR0_ADDR: sh4_handle_tcor0_addr_w(sh4,data,mem_mask); break;
+ case SH4_TCNT0_ADDR: sh4_handle_tcnt0_addr_w(sh4,data,mem_mask); break;
+ case SH4_TCOR1_ADDR: sh4_handle_tcor1_addr_w(sh4,data,mem_mask); break;
+ case SH4_TCNT1_ADDR: sh4_handle_tcnt1_addr_w(sh4,data,mem_mask); break;
+ case SH4_TCOR2_ADDR: sh4_handle_tcor2_addr_w(sh4,data,mem_mask); break;
+ case SH4_TCNT2_ADDR: sh4_handle_tcnt2_addr_w(sh4,data,mem_mask); break;
+ case SH4_TOCR_ADDR: sh4_handle_tocr_addr_w(sh4,data,mem_mask); break; // not supported
+ case SH4_TCPR2_ADDR: sh4_handle_tcpr2_addr_w(sh4,data,mem_mask); break; // not supported
+/*********************************************************************************************************************
+ INTC (Interrupt Controller)
+*********************************************************************************************************************/
+ case ICR:
+ sh4->m[ICR] = (sh4->m[ICR] & 0x7fff) | (old & 0x8000);
+ break;
+ case IPRA: sh4_handler_ipra_w(sh4, data, mem_mask); break;
+ case IPRB:
+ sh4->exception_priority[SH4_INTC_SCI1ERI] = INTPRI((sh4->m[IPRB] & 0x00f0) >> 4, SH4_INTC_SCI1ERI);
+ sh4->exception_priority[SH4_INTC_SCI1RXI] = INTPRI((sh4->m[IPRB] & 0x00f0) >> 4, SH4_INTC_SCI1RXI);
+ sh4->exception_priority[SH4_INTC_SCI1TXI] = INTPRI((sh4->m[IPRB] & 0x00f0) >> 4, SH4_INTC_SCI1TXI);
+ sh4->exception_priority[SH4_INTC_SCI1TEI] = INTPRI((sh4->m[IPRB] & 0x00f0) >> 4, SH4_INTC_SCI1TEI);
+ sh4->exception_priority[SH4_INTC_RCMI] = INTPRI((sh4->m[IPRB] & 0x0f00) >> 8, SH4_INTC_RCMI);
+ sh4->exception_priority[SH4_INTC_ROVI] = INTPRI((sh4->m[IPRB] & 0x0f00) >> 8, SH4_INTC_ROVI);
+ sh4->exception_priority[SH4_INTC_ITI] = INTPRI((sh4->m[IPRB] & 0xf000) >> 12, SH4_INTC_ITI);
+ sh4_exception_recompute(sh4);
+ break;
+ case IPRC:
+ sh4->exception_priority[SH4_INTC_HUDI] = INTPRI(sh4->m[IPRC] & 0x000f, SH4_INTC_HUDI);
+ sh4->exception_priority[SH4_INTC_SCIFERI] = INTPRI((sh4->m[IPRC] & 0x00f0) >> 4, SH4_INTC_SCIFERI);
+ sh4->exception_priority[SH4_INTC_SCIFRXI] = INTPRI((sh4->m[IPRC] & 0x00f0) >> 4, SH4_INTC_SCIFRXI);
+ sh4->exception_priority[SH4_INTC_SCIFBRI] = INTPRI((sh4->m[IPRC] & 0x00f0) >> 4, SH4_INTC_SCIFBRI);
+ sh4->exception_priority[SH4_INTC_SCIFTXI] = INTPRI((sh4->m[IPRC] & 0x00f0) >> 4, SH4_INTC_SCIFTXI);
+ sh4->exception_priority[SH4_INTC_DMTE0] = INTPRI((sh4->m[IPRC] & 0x0f00) >> 8, SH4_INTC_DMTE0);
+ sh4->exception_priority[SH4_INTC_DMTE1] = INTPRI((sh4->m[IPRC] & 0x0f00) >> 8, SH4_INTC_DMTE1);
+ sh4->exception_priority[SH4_INTC_DMTE2] = INTPRI((sh4->m[IPRC] & 0x0f00) >> 8, SH4_INTC_DMTE2);
+ sh4->exception_priority[SH4_INTC_DMTE3] = INTPRI((sh4->m[IPRC] & 0x0f00) >> 8, SH4_INTC_DMTE3);
+ sh4->exception_priority[SH4_INTC_DMAE] = INTPRI((sh4->m[IPRC] & 0x0f00) >> 8, SH4_INTC_DMAE);
+ sh4->exception_priority[SH4_INTC_GPOI] = INTPRI((sh4->m[IPRC] & 0xf000) >> 12, SH4_INTC_GPOI);
+ sh4_exception_recompute(sh4);
+ break;
+/*********************************************************************************************************************
+ DMAC (DMA Controller)
+*********************************************************************************************************************/
+ case SH4_SAR0_ADDR: sh4_handle_sar0_addr_w(sh4,data,mem_mask); break;
+ case SH4_SAR1_ADDR: sh4_handle_sar1_addr_w(sh4,data,mem_mask); break;
+ case SH4_SAR2_ADDR: sh4_handle_sar2_addr_w(sh4,data,mem_mask); break;
+ case SH4_SAR3_ADDR: sh4_handle_sar3_addr_w(sh4,data,mem_mask); break;
+ case SH4_DAR0_ADDR: sh4_handle_dar0_addr_w(sh4,data,mem_mask); break;
+ case SH4_DAR1_ADDR: sh4_handle_dar1_addr_w(sh4,data,mem_mask); break;
+ case SH4_DAR2_ADDR: sh4_handle_dar2_addr_w(sh4,data,mem_mask); break;
+ case SH4_DAR3_ADDR: sh4_handle_dar3_addr_w(sh4,data,mem_mask); break;
+ case SH4_DMATCR0_ADDR: sh4_handle_dmatcr0_addr_w(sh4,data,mem_mask); break;
+ case SH4_DMATCR1_ADDR: sh4_handle_dmatcr1_addr_w(sh4,data,mem_mask); break;
+ case SH4_DMATCR2_ADDR: sh4_handle_dmatcr2_addr_w(sh4,data,mem_mask); break;
+ case SH4_DMATCR3_ADDR: sh4_handle_dmatcr3_addr_w(sh4,data,mem_mask); break;
+ case SH4_CHCR0_ADDR: sh4_handle_chcr0_addr_w(sh4,data,mem_mask); break;
+ case SH4_CHCR1_ADDR: sh4_handle_chcr1_addr_w(sh4,data,mem_mask); break;
+ case SH4_CHCR2_ADDR: sh4_handle_chcr2_addr_w(sh4,data,mem_mask); break;
+ case SH4_CHCR3_ADDR: sh4_handle_chcr3_addr_w(sh4,data,mem_mask); break;
+ case SH4_DMAOR_ADDR: sh4_handle_dmaor_addr_w(sh4,data,mem_mask); break;
+/*********************************************************************************************************************
+ Store Queues
+*********************************************************************************************************************/
+ case QACR0:
+ case QACR1:
+ break;
+/*********************************************************************************************************************
+ I/O
+*********************************************************************************************************************/
+ case PCTRA:
+ sh4->ioport16_pullup = 0;
+ sh4->ioport16_direction = 0;
+ for (a=0;a < 16;a++) {
+ sh4->ioport16_direction |= (sh4->m[PCTRA] & (1 << (a*2))) >> a;
+ sh4->ioport16_pullup |= (sh4->m[PCTRA] & (1 << (a*2+1))) >> (a+1);
+ }
+ sh4->ioport16_direction &= 0xffff;
+ sh4->ioport16_pullup = (sh4->ioport16_pullup | sh4->ioport16_direction) ^ 0xffff;
+ if (sh4->m[BCR2] & 1)
+ sh4->io->write_dword(SH4_IOPORT_16, (UINT64)(sh4->m[PDTRA] & sh4->ioport16_direction) | ((UINT64)sh4->m[PCTRA] << 16));
+ break;
+ case PDTRA:
+ if (sh4->m[BCR2] & 1)
+ sh4->io->write_dword(SH4_IOPORT_16, (UINT64)(sh4->m[PDTRA] & sh4->ioport16_direction) | ((UINT64)sh4->m[PCTRA] << 16));
+ break;
+ case PCTRB:
+ sh4->ioport4_pullup = 0;
+ sh4->ioport4_direction = 0;
+ for (a=0;a < 4;a++) {
+ sh4->ioport4_direction |= (sh4->m[PCTRB] & (1 << (a*2))) >> a;
+ sh4->ioport4_pullup |= (sh4->m[PCTRB] & (1 << (a*2+1))) >> (a+1);
+ }
+ sh4->ioport4_direction &= 0xf;
+ sh4->ioport4_pullup = (sh4->ioport4_pullup | sh4->ioport4_direction) ^ 0xf;
+ if (sh4->m[BCR2] & 1)
+ sh4->io->write_dword(SH4_IOPORT_4, (sh4->m[PDTRB] & sh4->ioport4_direction) | (sh4->m[PCTRB] << 16));
+ break;
+ case PDTRB:
+ if (sh4->m[BCR2] & 1)
+ sh4->io->write_dword(SH4_IOPORT_4, (sh4->m[PDTRB] & sh4->ioport4_direction) | (sh4->m[PCTRB] << 16));
+ break;
+
+ case SCBRR2:
+ break;
+
+ case SCSPTR2: //trips often in aristocrat mk-6
+ break;
+
+ default:
+ logerror("sh4_internal_w: Unmapped write %08x, %08x @ %08x\n", 0xfe000000+((offset & 0x3fc0) << 11)+((offset & 0x3f) << 2), data, mem_mask);
+ break;
+ }
+}
+
+READ32_HANDLER( sh4_internal_r )
+{
+ sh4_state *sh4 = get_safe_token(&space->device());
+
+ if (sh4->cpu_type != CPU_TYPE_SH4)
+ fatalerror("sh4_internal_r uses sh4->m[] with SH3\n");
+
+ UINT32 addr = (offset << 2) + 0xfe000000;
+ offset = ((addr & 0xfc) >> 2) | ((addr & 0x1fe0000) >> 11);
+
+// printf("sh4_internal_r: Read %08x (%x) @ %08x\n", 0xfe000000+((offset & 0x3fc0) << 11)+((offset & 0x3f) << 2), offset, mem_mask);
+
+ switch( offset )
+ {
+ case VERSION:
+ return PVR_SH7091; // 0x040205c1, this is what a real SH7091 in a Dreamcast returns - the later Naomi BIOSes check and care!
+ break;
+ case PRR:
+ return 0;
+ break;
+ case IPRD:
+ return 0x00000000; // SH7750 ignores writes here and always returns zero
+ break;
+ case RTCNT:
+ if ((sh4->m[RTCSR] >> 3) & 7)
+ { // activated
+ //((double)rtcnt_div[(sh4->m[RTCSR] >> 3) & 7] / (double)100000000)
+ //return (refresh_timer_base + (sh4->refresh_timer->elapsed() * (double)100000000) / (double)rtcnt_div[(sh4->m[RTCSR] >> 3) & 7]) & 0xff;
+ return compute_ticks_refresh_timer(sh4->refresh_timer, sh4->bus_clock, sh4->refresh_timer_base, rtcnt_div[(sh4->m[RTCSR] >> 3) & 7]) & 0xff;
+ }
+ else
+ return sh4->m[RTCNT];
+ break;
+
+/*********************************************************************************************************************
+ INTC (Interrupt Controller)
+*********************************************************************************************************************/
+
+ case IPRA:
+ return sh4->SH4_IPRA;
+
+/*********************************************************************************************************************
+ TMU (Timer Unit)
+*********************************************************************************************************************/
+ case SH4_TSTR_ADDR: return sh4_handle_tstr_addr_r(sh4, mem_mask);
+ case SH4_TCR0_ADDR: return sh4_handle_tcr0_addr_r(sh4, mem_mask);
+ case SH4_TCR1_ADDR: return sh4_handle_tcr1_addr_r(sh4, mem_mask);
+ case SH4_TCR2_ADDR: return sh4_handle_tcr2_addr_r(sh4, mem_mask);
+ case SH4_TCNT0_ADDR: return sh4_handle_tcnt0_addr_r(sh4, mem_mask);
+ case SH4_TCNT1_ADDR: return sh4_handle_tcnt1_addr_r(sh4, mem_mask);
+ case SH4_TCNT2_ADDR: return sh4_handle_tcnt2_addr_r(sh4, mem_mask);
+ case SH4_TCOR0_ADDR: return sh4_handle_tcor0_addr_r(sh4, mem_mask);
+ case SH4_TCOR1_ADDR: return sh4_handle_tcor1_addr_r(sh4, mem_mask);
+ case SH4_TCOR2_ADDR: return sh4_handle_tcor2_addr_r(sh4, mem_mask);
+ case SH4_TOCR_ADDR: return sh4_handle_tocr_addr_r(sh4, mem_mask); // not supported
+ case SH4_TCPR2_ADDR: return sh4_handle_tcpr2_addr_r(sh4, mem_mask); // not supported
+/*********************************************************************************************************************
+ DMAC (DMA Controller)
+*********************************************************************************************************************/
+ case SH4_SAR0_ADDR: return sh4_handle_sar0_addr_r(sh4,mem_mask);
+ case SH4_SAR1_ADDR: return sh4_handle_sar1_addr_r(sh4,mem_mask);
+ case SH4_SAR2_ADDR: return sh4_handle_sar2_addr_r(sh4,mem_mask);
+ case SH4_SAR3_ADDR: return sh4_handle_sar3_addr_r(sh4,mem_mask);
+ case SH4_DAR0_ADDR: return sh4_handle_dar0_addr_r(sh4,mem_mask);
+ case SH4_DAR1_ADDR: return sh4_handle_dar1_addr_r(sh4,mem_mask);
+ case SH4_DAR2_ADDR: return sh4_handle_dar2_addr_r(sh4,mem_mask);
+ case SH4_DAR3_ADDR: return sh4_handle_dar3_addr_r(sh4,mem_mask);
+ case SH4_DMATCR0_ADDR: return sh4_handle_dmatcr0_addr_r(sh4,mem_mask);
+ case SH4_DMATCR1_ADDR: return sh4_handle_dmatcr1_addr_r(sh4,mem_mask);
+ case SH4_DMATCR2_ADDR: return sh4_handle_dmatcr2_addr_r(sh4,mem_mask);
+ case SH4_DMATCR3_ADDR: return sh4_handle_dmatcr3_addr_r(sh4,mem_mask);
+ case SH4_CHCR0_ADDR: return sh4_handle_chcr0_addr_r(sh4,mem_mask);
+ case SH4_CHCR1_ADDR: return sh4_handle_chcr1_addr_r(sh4,mem_mask);
+ case SH4_CHCR2_ADDR: return sh4_handle_chcr2_addr_r(sh4,mem_mask);
+ case SH4_CHCR3_ADDR: return sh4_handle_chcr3_addr_r(sh4,mem_mask);
+ case SH4_DMAOR_ADDR: return sh4_handle_dmaor_addr_r(sh4,mem_mask);
+/*********************************************************************************************************************
+ I/O Ports
+*********************************************************************************************************************/
+
+ case PDTRA:
+ if (sh4->m[BCR2] & 1)
+ return (sh4->io->read_dword(SH4_IOPORT_16) & ~sh4->ioport16_direction) | (sh4->m[PDTRA] & sh4->ioport16_direction);
+ break;
+ case PDTRB:
+ if (sh4->m[BCR2] & 1)
+ return (sh4->io->read_dword(SH4_IOPORT_4) & ~sh4->ioport4_direction) | (sh4->m[PDTRB] & sh4->ioport4_direction);
+ break;
+
+ // SCIF (UART with FIFO)
+ case SCFSR2:
+ return 0x60; //read-only status register
+ }
+ return sh4->m[offset];
+}
+
+void sh4_set_frt_input(device_t *device, int state)
+{
+ sh4_state *sh4 = get_safe_token(device);
+
+ if (sh4->cpu_type != CPU_TYPE_SH4)
+ fatalerror("sh4_set_frt_input uses sh4->m[] with SH3\n");
+
+ if(state == PULSE_LINE)
+ {
+ sh4_set_frt_input(device, ASSERT_LINE);
+ sh4_set_frt_input(device, CLEAR_LINE);
+ return;
+ }
+
+ if(sh4->frt_input == state) {
+ return;
+ }
+
+ sh4->frt_input = state;
+
+ if (sh4->cpu_type == CPU_TYPE_SH4)
+ {
+
+ if(sh4->m[5] & 0x8000) {
+ if(state == CLEAR_LINE) {
+ return;
+ }
+ } else {
+ if(state == ASSERT_LINE) {
+ return;
+ }
+ }
+ }
+ else
+ {
+ fatalerror("sh4_set_frt_input uses sh4->m[] with SH3\n");
+ }
+
+#if 0
+ sh4_timer_resync();
+ sh4->icr = sh4->frc;
+ sh4->m[4] |= ICF;
+ logerror("SH4 '%s': ICF activated (%x)\n", sh4->device->tag(), sh4->pc & AM);
+ sh4_recalc_irq();
+#endif
+}
+
+void sh4_set_irln_input(device_t *device, int value)
+{
+ sh4_state *sh4 = get_safe_token(device);
+
+ if (sh4->irln == value)
+ return;
+ sh4->irln = value;
+ device_set_input_line(device, SH4_IRLn, ASSERT_LINE);
+ device_set_input_line(device, SH4_IRLn, CLEAR_LINE);
+}
+
+void sh4_set_irq_line(sh4_state *sh4, int irqline, int state) // set state of external interrupt line
+{
+ if (sh4->cpu_type == CPU_TYPE_SH3)
+ {
+ /***** ASSUME THIS TO BE WRONG FOR NOW *****/
+
+ if (irqline == INPUT_LINE_NMI)
+ {
+ fatalerror("SH3 NMI Unimplemented\n");
+ }
+ else
+ {
+ //if (irqline > SH4_IRL3)
+ // return;
+ if (sh4->irq_line_state[irqline] == state)
+ return;
+ sh4->irq_line_state[irqline] = state;
+
+ if( state == CLEAR_LINE )
+ {
+ LOG(("SH-4 '%s' cleared external irq IRL%d\n", sh4->device->tag(), irqline));
+ sh4_exception_unrequest(sh4, SH4_INTC_IRL0+irqline-SH4_IRL0);
+ }
+ else
+ {
+ LOG(("SH-4 '%s' assert external irq IRL%d\n", sh4->device->tag(), irqline));
+ sh4_exception_request(sh4, SH4_INTC_IRL0+irqline-SH4_IRL0);
+ }
+
+ }
+
+ /***** END ASSUME THIS TO BE WRONG FOR NOW *****/
+ }
+ else
+ {
+ int s;
+
+ if (irqline == INPUT_LINE_NMI)
+ {
+ if (sh4->nmi_line_state == state)
+ return;
+ if (sh4->m[ICR] & 0x100)
+ {
+ if ((state == CLEAR_LINE) && (sh4->nmi_line_state == ASSERT_LINE)) // rising
+ {
+ LOG(("SH-4 '%s' assert nmi\n", sh4->device->tag()));
+ sh4_exception_request(sh4, SH4_INTC_NMI);
+ sh4_dmac_nmi(sh4);
+ }
+ }
+ else
+ {
+ if ((state == ASSERT_LINE) && (sh4->nmi_line_state == CLEAR_LINE)) // falling
+ {
+ LOG(("SH-4 '%s' assert nmi\n", sh4->device->tag()));
+ sh4_exception_request(sh4, SH4_INTC_NMI);
+ sh4_dmac_nmi(sh4);
+ }
+ }
+ if (state == CLEAR_LINE)
+ sh4->m[ICR] ^= 0x8000;
+ else
+ sh4->m[ICR] |= 0x8000;
+ sh4->nmi_line_state = state;
+ }
+ else
+ {
+ if (sh4->m[ICR] & 0x80) // four independent external interrupt sources
+ {
+ if (irqline > SH4_IRL3)
+ return;
+ if (sh4->irq_line_state[irqline] == state)
+ return;
+ sh4->irq_line_state[irqline] = state;
+
+ if( state == CLEAR_LINE )
+ {
+ LOG(("SH-4 '%s' cleared external irq IRL%d\n", sh4->device->tag(), irqline));
+ sh4_exception_unrequest(sh4, SH4_INTC_IRL0+irqline-SH4_IRL0);
+ }
+ else
+ {
+ LOG(("SH-4 '%s' assert external irq IRL%d\n", sh4->device->tag(), irqline));
+ sh4_exception_request(sh4, SH4_INTC_IRL0+irqline-SH4_IRL0);
+ }
+ }
+ else // level-encoded interrupt
+ {
+ if (irqline != SH4_IRLn)
+ return;
+ if ((sh4->irln > 15) || (sh4->irln < 0))
+ return;
+ for (s = 0; s < 15; s++)
+ sh4_exception_unrequest(sh4, SH4_INTC_IRLn0+s);
+ if (sh4->irln < 15)
+ sh4_exception_request(sh4, SH4_INTC_IRLn0+sh4->irln);
+ LOG(("SH-4 '%s' IRLn0-IRLn3 level #%d\n", sh4->device->tag(), sh4->irln));
+ }
+ }
+ if (sh4->test_irq && (!sh4->delay))
+ sh4_check_pending_irq(sh4, "sh4_set_irq_line");
+ }
+}
+
+void sh4_parse_configuration(sh4_state *sh4, const struct sh4_config *conf)
+{
+ if(conf)
+ {
+ switch((conf->md2 << 2) | (conf->md1 << 1) | (conf->md0))
+ {
+ case 0:
+ sh4->cpu_clock = conf->clock;
+ sh4->bus_clock = conf->clock / 4;
+ sh4->pm_clock = conf->clock / 4;
+ break;
+ case 1:
+ sh4->cpu_clock = conf->clock;
+ sh4->bus_clock = conf->clock / 6;
+ sh4->pm_clock = conf->clock / 6;
+ break;
+ case 2:
+ sh4->cpu_clock = conf->clock;
+ sh4->bus_clock = conf->clock / 3;
+ sh4->pm_clock = conf->clock / 6;
+ break;
+ case 3:
+ sh4->cpu_clock = conf->clock;
+ sh4->bus_clock = conf->clock / 3;
+ sh4->pm_clock = conf->clock / 6;
+ break;
+ case 4:
+ sh4->cpu_clock = conf->clock;
+ sh4->bus_clock = conf->clock / 2;
+ sh4->pm_clock = conf->clock / 4;
+ break;
+ case 5:
+ sh4->cpu_clock = conf->clock;
+ sh4->bus_clock = conf->clock / 2;
+ sh4->pm_clock = conf->clock / 4;
+ break;
+ }
+ sh4->is_slave = (~(conf->md7)) & 1;
+ }
+ else
+ {
+ sh4->cpu_clock = 200000000;
+ sh4->bus_clock = 100000000;
+ sh4->pm_clock = 50000000;
+ sh4->is_slave = 0;
+ }
+}
+
+void sh4_common_init(device_t *device)
+{
+ sh4_state *sh4 = get_safe_token(device);
+ int i;
+
+ for (i=0; i<3; i++)
+ {
+ sh4->timer[i] = device->machine().scheduler().timer_alloc(FUNC(sh4_timer_callback), sh4);
+ sh4->timer[i]->adjust(attotime::never, i);
+ }
+
+ for (i=0; i<4; i++)
+ {
+ sh4->dma_timer[i] = device->machine().scheduler().timer_alloc(FUNC(sh4_dmac_callback), sh4);
+ sh4->dma_timer[i]->adjust(attotime::never, i);
+ }
+
+ sh4->refresh_timer = device->machine().scheduler().timer_alloc(FUNC(sh4_refresh_timer_callback), sh4);
+ sh4->refresh_timer->adjust(attotime::never);
+ sh4->refresh_timer_base = 0;
+
+ sh4->rtc_timer = device->machine().scheduler().timer_alloc(FUNC(sh4_rtc_timer_callback), sh4);
+ sh4->rtc_timer->adjust(attotime::never);
+
+ sh4->m = auto_alloc_array(device->machine(), UINT32, 16384);
+}
+
+UINT32 sh4_getsqremap(sh4_state *sh4, UINT32 address)
+{
+ if (!sh4->sh4_mmu_enabled)
+ return address;
+ else
+ {
+ int i;
+ UINT32 topaddr = address&0xfff00000;
+
+ for (i=0;i<64;i++)
+ {
+ UINT32 topcmp = sh4->sh4_tlb_address[i]&0xfff00000;
+ if (topcmp==topaddr)
+ return (address&0x000fffff) | ((sh4->sh4_tlb_data[i])&0xfff00000);
+ }
+
+ }
+
+ return address;
+}
+
+READ64_HANDLER( sh4_tlb_r )
+{
+ sh4_state *sh4 = get_safe_token(&space->device());
+
+ int offs = offset*8;
+
+ if (offs >= 0x01000000)
+ {
+ UINT8 i = (offs>>8)&63;
+ return sh4->sh4_tlb_data[i];
+ }
+ else
+ {
+ UINT8 i = (offs>>8)&63;
+ return sh4->sh4_tlb_address[i];
+ }
+}
+
+WRITE64_HANDLER( sh4_tlb_w )
+{
+ sh4_state *sh4 = get_safe_token(&space->device());
+
+ int offs = offset*8;
+
+ if (offs >= 0x01000000)
+ {
+ UINT8 i = (offs>>8)&63;
+ sh4->sh4_tlb_data[i] = data&0xffffffff;
+ }
+ else
+ {
+ UINT8 i = (offs>>8)&63;
+ sh4->sh4_tlb_address[i] = data&0xffffffff;
+ }
+}
+