X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=libpcsxcore%2Fpsxevents.c;fp=libpcsxcore%2Fpsxevents.c;h=06089f2ea8f0ba8d7b19e26df7cef660f6d9a8c6;hb=9a0a61d27586bfb93aa443cc59d9588d2b9cf992;hp=0000000000000000000000000000000000000000;hpb=bf58ac4cd633bbd3c40bd7f79f9e00b98e156572;p=pcsx_rearmed.git

diff --git a/libpcsxcore/psxevents.c b/libpcsxcore/psxevents.c
new file mode 100644
index 00000000..06089f2e
--- /dev/null
+++ b/libpcsxcore/psxevents.c
@@ -0,0 +1,104 @@
+#include <stdio.h>
+#include "r3000a.h"
+#include "cdrom.h"
+#include "psxdma.h"
+#include "mdec.h"
+#include "psxevents.h"
+
+extern int pending_exception;
+
+//#define evprintf printf
+#define evprintf(...)
+
+u32 event_cycles[PSXINT_COUNT];
+
+u32 schedule_timeslice(void)
+{
+	u32 i, c = psxRegs.cycle;
+	u32 irqs = psxRegs.interrupt;
+	s32 min, dif;
+
+	min = PSXCLK;
+	for (i = 0; irqs != 0; i++, irqs >>= 1) {
+		if (!(irqs & 1))
+			continue;
+		dif = event_cycles[i] - c;
+		//evprintf("  ev %d\n", dif);
+		if (0 < dif && dif < min)
+			min = dif;
+	}
+	next_interupt = c + min;
+	return next_interupt;
+}
+
+static void irqNoOp() {
+}
+
+typedef void (irq_func)();
+
+static irq_func * const irq_funcs[] = {
+	[PSXINT_SIO]	= sioInterrupt,
+	[PSXINT_CDR]	= cdrInterrupt,
+	[PSXINT_CDREAD]	= cdrPlayReadInterrupt,
+	[PSXINT_GPUDMA]	= gpuInterrupt,
+	[PSXINT_MDECOUTDMA] = mdec1Interrupt,
+	[PSXINT_SPUDMA]	= spuInterrupt,
+	[PSXINT_MDECINDMA] = mdec0Interrupt,
+	[PSXINT_GPUOTCDMA] = gpuotcInterrupt,
+	[PSXINT_CDRDMA] = cdrDmaInterrupt,
+	[PSXINT_NEWDRC_CHECK] = irqNoOp,
+	[PSXINT_CDRLID] = cdrLidSeekInterrupt,
+	[PSXINT_IRQ10] = irq10Interrupt,
+	[PSXINT_SPU_UPDATE] = spuUpdate,
+	[PSXINT_RCNT] = psxRcntUpdate,
+};
+
+/* local dupe of psxBranchTest, using event_cycles */
+void irq_test(psxCP0Regs *cp0)
+{
+	u32 cycle = psxRegs.cycle;
+	u32 irq, irq_bits;
+
+	for (irq = 0, irq_bits = psxRegs.interrupt; irq_bits != 0; irq++, irq_bits >>= 1) {
+		if (!(irq_bits & 1))
+			continue;
+		if ((s32)(cycle - event_cycles[irq]) >= 0) {
+			// note: irq_funcs() also modify psxRegs.interrupt
+			psxRegs.interrupt &= ~(1u << irq);
+			irq_funcs[irq]();
+		}
+	}
+
+	cp0->n.Cause &= ~0x400;
+	if (psxHu32(0x1070) & psxHu32(0x1074))
+		cp0->n.Cause |= 0x400;
+	if (((cp0->n.Cause | 1) & cp0->n.SR & 0x401) == 0x401) {
+		psxException(0, 0, cp0);
+		pending_exception = 1;
+	}
+}
+
+void gen_interupt(psxCP0Regs *cp0)
+{
+	evprintf("  +ge %08x, %u->%u (%d)\n", psxRegs.pc, psxRegs.cycle,
+		next_interupt, next_interupt - psxRegs.cycle);
+
+	irq_test(cp0);
+	//pending_exception = 1;
+
+	schedule_timeslice();
+
+	evprintf("  -ge %08x, %u->%u (%d)\n", psxRegs.pc, psxRegs.cycle,
+		next_interupt, next_interupt - psxRegs.cycle);
+}
+
+void events_restore(void)
+{
+	int i;
+	for (i = 0; i < PSXINT_COUNT; i++)
+		event_cycles[i] = psxRegs.intCycle[i].sCycle + psxRegs.intCycle[i].cycle;
+
+	event_cycles[PSXINT_RCNT] = psxNextsCounter + psxNextCounter;
+	psxRegs.interrupt |=  1 << PSXINT_RCNT;
+	psxRegs.interrupt &= (1 << PSXINT_COUNT) - 1;
+}