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#include <revolution.h>
#include <revolution/os.h>
#include <cstring>
#include "__os.h"
#if DEBUG
u64 __OSSpuriousInterrupts = 0;
#endif
static __OSInterruptHandler* InterruptHandlerTable;
volatile OSTime __OSLastInterruptTime;
volatile __OSInterrupt __OSLastInterrupt;
volatile u32 __OSLastInterruptSrr0;
static OSInterruptMask InterruptPrioTable[] = {
OS_INTERRUPTMASK_PI_ERROR,
OS_INTERRUPTMASK_PI_DEBUG,
OS_INTERRUPTMASK_MEM,
OS_INTERRUPTMASK_PI_RSW,
OS_INTERRUPTMASK_PI_VI,
0x10,
OS_INTERRUPTMASK_PI_PE,
OS_INTERRUPTMASK_PI_HSP,
OS_INTERRUPTMASK_DSP_ARAM | OS_INTERRUPTMASK_DSP_DSP | OS_INTERRUPTMASK_AI |
OS_INTERRUPTMASK_EXI | OS_INTERRUPTMASK_PI_SI | OS_INTERRUPTMASK_PI_DI,
OS_INTERRUPTMASK_DSP_AI,
OS_INTERRUPTMASK_PI_CP,
0xFFFFFFFF,
};
#if DEBUG
char* __OSInterruptNames[33] = {
"MEM_0",
"MEM_1",
"MEM_2",
"MEM_3",
"MEM_ADDRESS",
"DSP_AI",
"DSP_ARAM",
"DSP_DSP",
"AI_AI",
"EXI_0_EXI",
"EXI_0_TC",
"EXI_0_EXT",
"EXI_1_EXI",
"EXI_1_TC",
"EXI_1_EXT",
"EXI_2_EXI",
"EXI_2_TC",
"PI_CP",
"PI_PE_TOKEN",
"PI_PE_FINISH",
"PI_SI",
"PI_DI",
"PI_RSW",
"PI_ERROR",
"PI_VI",
"PI_DEBUG",
"PI_HSP",
"PI_ACR",
"unknown",
"unknown",
"unknown",
"unknown",
"unknown",
};
char* __OSPIErrors[8] = {
"No Error",
"Misaligned address for CPU request",
"Incorrect transfer type (tt) from CPU",
"Unsupported transfer size",
"Address out of range",
"Write to ROM address space",
"Read from GX Fifo",
"Reserved error code",
};
#endif
// prototypes
static void ExternalInterruptHandler(__REGISTER __OSException exception, __REGISTER OSContext* context);
extern void __RAS_OSDisableInterrupts_begin(void);
extern void __RAS_OSDisableInterrupts_end(void);
#ifdef __GEKKO__
asm BOOL OSDisableInterrupts(void) {
nofralloc
entry __RAS_OSDisableInterrupts_begin
mfmsr r3
rlwinm r4, r3, 0, 17, 15
mtmsr r4
entry __RAS_OSDisableInterrupts_end
rlwinm r3, r3, 17, 31, 31
blr
}
asm BOOL OSEnableInterrupts(void) {
nofralloc
mfmsr r3
ori r4, r3, 0x8000
mtmsr r4
rlwinm r3, r3, 17, 31, 31
blr
}
asm BOOL OSRestoreInterrupts(__REGISTER BOOL level) {
nofralloc
cmpwi level, 0
mfmsr r4
beq _disable
ori r5, r4, 0x8000
b _restore
_disable:
rlwinm r5, r4, 0, 17, 15
_restore:
mtmsr r5
rlwinm r3, r4, 17, 31, 31
blr
}
#endif
__OSInterruptHandler __OSSetInterruptHandler(__OSInterrupt interrupt, __OSInterruptHandler handler) {
__OSInterruptHandler oldHandler;
ASSERTMSGLINE(482, InterruptHandlerTable, "__OSSetInterruptHandler(): OSInit() must be called in advance.");
ASSERTMSGLINE(484, interrupt < 0x20, "__OSSetInterruptHandler(): unknown interrupt.");
oldHandler = InterruptHandlerTable[interrupt];
InterruptHandlerTable[interrupt] = handler;
return oldHandler;
}
__OSInterruptHandler __OSGetInterruptHandler(__OSInterrupt interrupt) {
ASSERTMSGLINE(504, InterruptHandlerTable, "__OSGetInterruptHandler(): OSInit() must be called in advance.");
ASSERTMSGLINE(506, interrupt < 0x20, "__OSGetInterruptHandler(): unknown interrupt.");
return InterruptHandlerTable[interrupt];
}
void __OSInterruptInit(void) {
InterruptHandlerTable = (void*)OSPhysicalToCached(0x3040);
memset(InterruptHandlerTable, 0, __OS_INTERRUPT_MAX * sizeof(__OSInterruptHandler));
*(OSInterruptMask*)OSPhysicalToCached(0x00C4) = 0;
*(OSInterruptMask*)OSPhysicalToCached(0x00C8) = 0;
*(u32*)0xCC003004 = 240;
*(u32*)0xCD000034 = 0x40000000;
__OSMaskInterrupts(OS_INTERRUPTMASK_MEM | OS_INTERRUPTMASK_DSP | OS_INTERRUPTMASK_AI |
OS_INTERRUPTMASK_EXI | OS_INTERRUPTMASK_PI);
__OSSetExceptionHandler(4, ExternalInterruptHandler);
#if DEBUG
__PIRegs[0] = 1;
__OSUnmaskInterrupts(0x100);
#endif
}
static u32 SetInterruptMask(OSInterruptMask mask, OSInterruptMask current) {
u32 reg;
switch (__cntlzw(mask)) {
case __OS_INTERRUPT_MEM_0:
case __OS_INTERRUPT_MEM_1:
case __OS_INTERRUPT_MEM_2:
case __OS_INTERRUPT_MEM_3:
case __OS_INTERRUPT_MEM_ADDRESS:
reg = 0;
if (!(current & OS_INTERRUPTMASK_MEM_0))
reg |= 0x1;
if (!(current & OS_INTERRUPTMASK_MEM_1))
reg |= 0x2;
if (!(current & OS_INTERRUPTMASK_MEM_2))
reg |= 0x4;
if (!(current & OS_INTERRUPTMASK_MEM_3))
reg |= 0x8;
if (!(current & OS_INTERRUPTMASK_MEM_ADDRESS))
reg |= 0x10;
__MEMRegs[0x0000000e] = (u16)reg;
mask &= ~OS_INTERRUPTMASK_MEM;
break;
case __OS_INTERRUPT_DSP_AI:
case __OS_INTERRUPT_DSP_ARAM:
case __OS_INTERRUPT_DSP_DSP:
reg = __DSPRegs[0x00000005];
reg &= ~0x1F8;
if (!(current & OS_INTERRUPTMASK_DSP_AI))
reg |= 0x10;
if (!(current & OS_INTERRUPTMASK_DSP_ARAM))
reg |= 0x40;
if (!(current & OS_INTERRUPTMASK_DSP_DSP))
reg |= 0x100;
__DSPRegs[0x00000005] = (u16)reg;
mask &= ~OS_INTERRUPTMASK_DSP;
break;
case __OS_INTERRUPT_AI_AI:
reg = __AIRegs[0];
reg &= ~0x2C;
if (!(current & OS_INTERRUPTMASK_AI_AI))
reg |= 0x4;
__AIRegs[0] = reg;
mask &= ~OS_INTERRUPTMASK_AI;
break;
case __OS_INTERRUPT_EXI_0_EXI:
case __OS_INTERRUPT_EXI_0_TC:
case __OS_INTERRUPT_EXI_0_EXT:
reg = __EXIRegs[0];
reg &= ~0x2C0F;
if (!(current & OS_INTERRUPTMASK_EXI_0_EXI))
reg |= 0x1;
if (!(current & OS_INTERRUPTMASK_EXI_0_TC))
reg |= 0x4;
if (!(current & OS_INTERRUPTMASK_EXI_0_EXT))
reg |= 0x400;
__EXIRegs[0] = reg;
mask &= ~OS_INTERRUPTMASK_EXI_0;
break;
case __OS_INTERRUPT_EXI_1_EXI:
case __OS_INTERRUPT_EXI_1_TC:
case __OS_INTERRUPT_EXI_1_EXT:
reg = __EXIRegs[5];
reg &= ~0xC0F;
if (!(current & OS_INTERRUPTMASK_EXI_1_EXI))
reg |= 0x1;
if (!(current & OS_INTERRUPTMASK_EXI_1_TC))
reg |= 0x4;
if (!(current & OS_INTERRUPTMASK_EXI_1_EXT))
reg |= 0x400;
__EXIRegs[5] = reg;
mask &= ~OS_INTERRUPTMASK_EXI_1;
break;
case __OS_INTERRUPT_EXI_2_EXI:
case __OS_INTERRUPT_EXI_2_TC:
reg = __EXIRegs[10];
reg &= ~0xF;
if (!(current & OS_INTERRUPTMASK_EXI_2_EXI))
reg |= 0x1;
if (!(current & OS_INTERRUPTMASK_EXI_2_TC))
reg |= 0x4;
__EXIRegs[10] = reg;
mask &= ~OS_INTERRUPTMASK_EXI_2;
break;
case __OS_INTERRUPT_PI_CP:
case __OS_INTERRUPT_PI_SI:
case __OS_INTERRUPT_PI_DI:
case __OS_INTERRUPT_PI_RSW:
case __OS_INTERRUPT_PI_ERROR:
case __OS_INTERRUPT_PI_VI:
case __OS_INTERRUPT_PI_DEBUG:
case __OS_INTERRUPT_PI_PE_TOKEN:
case __OS_INTERRUPT_PI_PE_FINISH:
case __OS_INTERRUPT_PI_HSP:
case __OS_INTERRUPT_PI_ACR:
reg = 0xF0;
if (!(current & OS_INTERRUPTMASK_PI_CP)) {
reg |= 0x800;
}
if (!(current & OS_INTERRUPTMASK_PI_SI)) {
reg |= 0x8;
}
if (!(current & OS_INTERRUPTMASK_PI_DI)) {
reg |= 0x4;
}
if (!(current & OS_INTERRUPTMASK_PI_RSW)) {
reg |= 0x2;
}
if (!(current & OS_INTERRUPTMASK_PI_ERROR)) {
reg |= 0x1;
}
if (!(current & OS_INTERRUPTMASK_PI_VI)) {
reg |= 0x100;
}
if (!(current & OS_INTERRUPTMASK_PI_DEBUG)) {
reg |= 0x1000;
}
if (!(current & OS_INTERRUPTMASK_PI_PE_TOKEN)) {
reg |= 0x200;
}
if (!(current & OS_INTERRUPTMASK_PI_PE_FINISH)) {
reg |= 0x400;
}
if (!(current & OS_INTERRUPTMASK_PI_HSP)) {
reg |= 0x2000;
}
if (!(current & OS_INTERRUPTMASK_PI_ACR)) {
reg |= 0x4000;
}
__PIRegs[1] = reg;
mask &= ~OS_INTERRUPTMASK_PI;
break;
default:
break;
}
return mask;
}
OSInterruptMask OSGetInterruptMask(void) {
return *(OSInterruptMask *)OSPhysicalToCached(0x00C8);
}
OSInterruptMask OSSetInterruptMask(OSInterruptMask local) {
BOOL enabled;
OSInterruptMask global;
OSInterruptMask prev;
OSInterruptMask mask;
enabled = OSDisableInterrupts();
global = *(OSInterruptMask *)OSPhysicalToCached(0x00C4);
prev = *(OSInterruptMask *)OSPhysicalToCached(0x00C8);
mask = (global | prev) ^ local;
*(OSInterruptMask *)OSPhysicalToCached(0x00C8) = local;
while (mask) {
mask = SetInterruptMask(mask, global | local);
}
OSRestoreInterrupts(enabled);
return prev;
}
OSInterruptMask __OSMaskInterrupts(OSInterruptMask global) {
BOOL enabled;
OSInterruptMask prev;
OSInterruptMask local;
OSInterruptMask mask;
enabled = OSDisableInterrupts();
prev = *(OSInterruptMask *)OSPhysicalToCached(0x00C4);
local = *(OSInterruptMask *)OSPhysicalToCached(0x00C8);
mask = ~(prev | local) & global;
global |= prev;
*(OSInterruptMask *)OSPhysicalToCached(0x00C4) = global;
while (mask) {
mask = SetInterruptMask(mask, global | local);
}
OSRestoreInterrupts(enabled);
return prev;
}
OSInterruptMask __OSUnmaskInterrupts(OSInterruptMask global) {
BOOL enabled;
OSInterruptMask prev;
OSInterruptMask local;
OSInterruptMask mask;
enabled = OSDisableInterrupts();
prev = *(OSInterruptMask *)OSPhysicalToCached(0x00C4);
local = *(OSInterruptMask *)OSPhysicalToCached(0x00C8);
mask = (prev | local) & global;
global = prev & ~global;
*(OSInterruptMask *)OSPhysicalToCached(0x00C4) = global;
while (mask) {
mask = SetInterruptMask(mask, global | local);
}
OSRestoreInterrupts(enabled);
return prev;
}
void __OSDispatchInterrupt(__OSException exception, OSContext* context) {
u32 intsr;
u32 mask;
u32 reg;
OSInterruptMask cause;
OSInterruptMask unmasked;
OSInterruptMask* prio;
__OSInterrupt interrupt;
__OSInterruptHandler handler;
intsr = __PIRegs[0];
intsr &= ~0x00010000;
mask = __PIRegs[1];
if (intsr == 0 || (intsr & mask) == 0) {
#if DEBUG
__OSSpuriousInterrupts++;
#endif
OSLoadContext(context);
}
cause = 0;
if (intsr & 0x00000080) {
reg = __MEMRegs[15];
if (reg & 0x1)
cause |= OS_INTERRUPTMASK_MEM_0;
if (reg & 0x2)
cause |= OS_INTERRUPTMASK_MEM_1;
if (reg & 0x4)
cause |= OS_INTERRUPTMASK_MEM_2;
if (reg & 0x8)
cause |= OS_INTERRUPTMASK_MEM_3;
if (reg & 0x10)
cause |= OS_INTERRUPTMASK_MEM_ADDRESS;
}
if (intsr & 0x00000040) {
reg = __DSPRegs[5];
if (reg & 0x8)
cause |= OS_INTERRUPTMASK_DSP_AI;
if (reg & 0x20)
cause |= OS_INTERRUPTMASK_DSP_ARAM;
if (reg & 0x80)
cause |= OS_INTERRUPTMASK_DSP_DSP;
}
if (intsr & 0x00000020) {
reg = __AIRegs[0];
if (reg & 0x8)
cause |= OS_INTERRUPTMASK_AI_AI;
}
if (intsr & 0x00000010) {
reg = __EXIRegs[0];
if (reg & 0x2)
cause |= OS_INTERRUPTMASK_EXI_0_EXI;
if (reg & 0x8)
cause |= OS_INTERRUPTMASK_EXI_0_TC;
if (reg & 0x800)
cause |= OS_INTERRUPTMASK_EXI_0_EXT;
reg = __EXIRegs[5];
if (reg & 0x2)
cause |= OS_INTERRUPTMASK_EXI_1_EXI;
if (reg & 0x8)
cause |= OS_INTERRUPTMASK_EXI_1_TC;
if (reg & 0x800)
cause |= OS_INTERRUPTMASK_EXI_1_EXT;
reg = __EXIRegs[10];
if (reg & 0x2)
cause |= OS_INTERRUPTMASK_EXI_2_EXI;
if (reg & 0x8)
cause |= OS_INTERRUPTMASK_EXI_2_TC;
}
if (intsr & 0x00002000)
cause |= OS_INTERRUPTMASK_PI_HSP;
if (intsr & 0x00001000)
cause |= OS_INTERRUPTMASK_PI_DEBUG;
if (intsr & 0x00000400)
cause |= OS_INTERRUPTMASK_PI_PE_FINISH;
if (intsr & 0x00000200)
cause |= OS_INTERRUPTMASK_PI_PE_TOKEN;
if (intsr & 0x00000100)
cause |= OS_INTERRUPTMASK_PI_VI;
if (intsr & 0x00000008)
cause |= OS_INTERRUPTMASK_PI_SI;
if (intsr & 0x00000004)
cause |= OS_INTERRUPTMASK_PI_DI;
if (intsr & 0x00000002)
cause |= OS_INTERRUPTMASK_PI_RSW;
if (intsr & 0x00000800)
cause |= OS_INTERRUPTMASK_PI_CP;
if (intsr & 0x00000001)
cause |= OS_INTERRUPTMASK_PI_ERROR;
if (intsr & 0x4000)
cause |= OS_INTERRUPTMASK_PI_ACR;
#if DEBUG
if (cause & OS_INTERRUPTMASK_PI_ERROR) {
OSReport("PI ERROR\n");
OSDumpContext(context);
OSReport("\nPIESR = 0x%08x PIEAR = 0x%08x\n", __PIRegs[7], __PIRegs[8]);
__PIRegs[0] = 1;
OSReport("PI Error = %s\n", __OSPIErrors[__PIRegs[7]]);
OSReport("Offending address = 0x%x (from PIEAR)\n", __PIRegs[8]);
}
#endif
unmasked = cause & ~(*(OSInterruptMask *)OSPhysicalToCached(0x00C4) |
*(OSInterruptMask *)OSPhysicalToCached(0x00C8));
if (unmasked) {
for (prio = InterruptPrioTable;; ++prio) {
if (unmasked & *prio) {
interrupt = (__OSInterrupt)__cntlzw(unmasked & *prio);
break;
}
}
handler = __OSGetInterruptHandler(interrupt);
if (handler) {
if (__OS_INTERRUPT_MEM_ADDRESS < interrupt) {
__OSLastInterrupt = interrupt;
__OSLastInterruptTime = OSGetTime();
__OSLastInterruptSrr0 = context->srr0;
}
OSDisableScheduler();
handler(interrupt, context);
OSEnableScheduler();
__OSReschedule();
OSLoadContext(context);
}
}
#if DEBUG
OSReport("Unhandled Interrupt(s): cause %08x intsr %08x\n", cause, intsr);
while (cause) {
interrupt = __cntlzw(cause);
cause &= ~(1 << (0x1F - __cntlzw(cause)));
OSReport(" %s\n", __OSInterruptNames[interrupt]);
}
#endif
OSLoadContext(context);
}
#ifdef __GEKKO__
static asm void ExternalInterruptHandler(__REGISTER __OSException exception,
__REGISTER OSContext* context) {
#pragma unused(exception)
nofralloc
OS_EXCEPTION_SAVE_GPRS(context)
stwu r1, -0x8(r1)
b __OSDispatchInterrupt
}
#endif
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