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dmacman: reversing interruptHandler

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This commit is contained in:
Kern 2014-05-18 14:14:46 -05:00
parent bc324beafb
commit 6ad5ae1588
1 changed files with 91 additions and 2 deletions
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93
src/dmacman/dmacman.c
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@ -9,7 +9,7 @@
#define DMACMAN_VERSION_MINOR (18)
typedef struct {
u32 unk0[16]; //0
u32 unk0[16]; //0 first 8 are mode1, second 8 are mode 2... whatever that means.
SceDmaOp ops[32]; //64
u32 unk2112;
u32 unk2116;
@ -660,7 +660,96 @@ s32 sceKernelDmaOpAssignMultiple(SceDmaOp **ops, s32 size)
return SCE_ERROR_OK;
}
static s32 interruptHandler() { }
//0x1148
static s32 interruptHandler(s32 arg0 __attribute__((unused)), s32 arg1)
{
u32 intr = sceKernelCpuSuspendIntr();
u32 addr = arg1? 0xBCA00000 : 0xBC900000;
u32 unk0, unk1, unk3 = 0, unk4;
unk0 = HW(addr + 4);
unk1 = HW(addr + 12);
unk2 = (unk1 | unk2) & 0xFF;
HW(addr + 8) = 0;
for (int i = 0; unk2 > (1 << i); i++) {
if (unk2 & (i << i)) {
if (!g_dmacman.unk0[i + 8*arg1]) {
// 14CC
if (g_dmacman.unk2132 & (1 << i))
Kprintf("Fatal error: Stray interrupt occurred\n");
} else {
SceDmaOp *op = g_dmacman.unk0[i + 8*arg1];
op->unk32 = HW(addr + 0x100);
op->unk36 = HW(addr + 0x100 + 4);
op->unk40 = HW(addr + 0x100 + 8);
op->unk44 = HW(addr + 0x100 + 12);
op->unk48 = HW(addr + 0x100 + 16);
if (unk0 & 1 << i) {
if (!HW(addr + 0x100 + 8) && ! (HW(addr + 0x100 + 16) & 0x1)) {
g_dmacman.unk2120 &= ~(1 << i);
unk3 |= op->unk24;
op->unk28 |= 0x40;
op->unk28 &= ~0x2;
op->unk30 = 0xFFFF;
g_dmacman.unk0[i + 8*arg1] = NULL;
}
HW(addr + 16) = (1 << i);
unk4 = 0;
} else {
// 0x1438
if (HW(addr + 0x100 + 8) && (HW(addr + 0x100 + 16) & 0x1)) {
sub_BCC(op);
}
g_dmacman.unk2120 &= ~(1 << i);
g_dmacman.unk0[i + 8*arg1] = NULL;
unk3 |= op->unk24;
op->unk28 |= 0x40;
op->unk28 &= ~0x2;
op->unk30 = 0xFFFF;
HW(addr + 16) = (1 << i);
unk4 = -1
}
// 0x139C
if (op->unk16 && op->unk16(op, unk4, i + 8*arg1, op->unk20) == 1) {
if (op->unk56) {
op->unk32 = op->unk56->unk0;
op->unk36 = op->unk56->unk4;
op->unk40 = op->unk56->unk8;
op->unk46 = op->unk56->unk12;
}
if (!g_dmacman.unk2128)
g_dmacman.unk2128 = op;
op->unk0 = NULL;
if (g_dmacman.unk2132) {
g_dmacman.unk2132->unk0 = op;
}
op->unk4 = g_dmacman.unk2132;
g_dmacman.unk2132 = op;
op->unk28 |= 0x1;
}
}
}
}
// 11D4
sceKernelSetEventFlag(g_dmacman.unk2140, unk3);
if (!g_dmacman.unk2128)
sub_14F4();
if ((g_dmacman.unk2120 | g_dmacman.unk2112) & 0xFF) {
u32 intr2 = sceKernelCpuSuspendIntr();
HW(0xBC100000) &= ~(1 << 6);
sceKernelCpuResumeIntr(intr2);
}
if ((g_dmacman.unk2120 | g_dmacman.unk2112) & 0xFF00) {
u32 intr2 = sceKernelCpuSuspendIntr();
HW(0xBC100000) &= ~(1 << 5);
sceKernelCpuResumeIntr(intr2);
}
sceKernelCpuResumeIntr(intr);
return -1;
}
//0x14f4
static void sub_14F4() { }