mirror of https://github.com/PCSX2/pcsx2.git
337 lines
6.5 KiB
C
337 lines
6.5 KiB
C
// EE core interrupt and exception handlers
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// most functions here can only use $at, $k0, and $k1
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// [made by] [RO]man, zerofrog
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#include "eekernel.h"
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#include "eeirq.h"
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#define LOAD_KERNELSTACK \
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"lui $sp, %hi(g_kernelstackend)\n" \
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"addiu $sp, %lo(g_kernelstackend)\n"
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__asm__(".org 0x0000");
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__asm__(".set noreorder");
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void CpuException0() {
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__asm__ (
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"lui $26, %hi(SavedT9)\n"
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"sd $25, %lo(SavedT9)($26)\n"
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"mfc0 $25, $13\n"
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"andi $25, 0x7C\n"
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"lui $26, %hi(VCRTable)\n"
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"addu $26, $25\n"
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"lw $26, %lo(VCRTable)($26)\n"
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"lui $25, %hi(SavedT9)\n"
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"jr $26\n"
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"ld $25, %lo(SavedT9)($25)\n"
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);
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}
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__asm__(".org 0x0180");
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__asm__(".set noreorder");
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void CpuException() {
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__asm__ (
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"lui $26, %hi(SavedT9)\n"
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"sd $25, %lo(SavedT9)($26)\n"
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"mfc0 $25, $13\n"
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"andi $25, 0x7C\n"
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"lui $26, %hi(VCRTable)\n"
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"addu $26, $25\n"
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"lw $26, %lo(VCRTable)($26)\n"
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"lui $25, %hi(SavedT9)\n"
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"jr $26\n"
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"ld $25, %lo(SavedT9)($25)\n"
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);
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}
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__asm__(".org 0x0200");
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__asm__(".set noreorder");
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__asm__(".set noat");
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void CpuException2() {
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__asm__ (
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"lui $26, %hi(SavedSP)\n"
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"sq $sp, %lo(SavedSP)($26)\n"
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"lui $26, %hi(SavedRA)\n"
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"sq $31, %lo(SavedRA)($26)\n"
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"lui $26, %hi(SavedAT)\n"
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"sq $1, %lo(SavedAT)($26)\n"
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"mfc0 $1, $13\n"
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"mfc0 $26, $14\n"
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"and $1, $26\n"
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"srl $1, 8\n"
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"andi $1, 0xFF\n"
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"plzcw $26, $1\n"
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"andi $26, 0xFF\n"
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"ori $1, $0, 0x1E\n"
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"subu $1, $26\n"
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"sll $1, 2\n"
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"lui $26, %hi(VIntTable)\n"
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"addu $26, $25\n"
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"lw $26, %lo(VIntTable)($26)\n"
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"jr $26\n"
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"nop\n"
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);
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}
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extern char call_used_regs[];
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extern char fixed_regs[];
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__asm__(".org 0x0280");
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__asm__(".set noreorder");
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void SyscException()
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{
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const register int code __asm__("$3"); // $v1
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if (code < 0) {
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__asm__(
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"addiu $sp, -0x10\n"
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"sw $31, 0($sp)\n"
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"mfc0 $26, $14\n"
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"addiu $26, 4\n"
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"sw $26, 4($sp)\n"
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"mtc0 $26, $14\n"
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"sync\n");
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table_SYSCALL[-code]();
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__asm__(
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"lw $26, 4($sp)\n"
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"lw $31, 0($sp)\n"
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"addiu $sp, 0x10\n"
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"mtc0 $26, $14\n"
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"sync\n"
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"eret\n"
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"nop\n");
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}
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if (code == 0x7c) {
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_Deci2Call();
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return;
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}
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__asm__(
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"lui $26, %hi(SavedSP)\n"
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"sq $sp, %lo(SavedSP)($26)\n"
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"lui $26, %hi(SavedRA)\n"
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"sq $31, %lo(SavedRA)($26)\n"
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"lui $26, %hi(SavedAT)\n"
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"sq $1, %lo(SavedAT)($26)\n"
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"mfc0 $1, $12\n"
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"addiu $26, $0, 0xFFE4\n"
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"and $1, $26\n"
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"mtc0 $1, $12\n"
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"sync\n"
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"move $26, $sp\n"
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LOAD_KERNELSTACK
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"addiu $sp, -0x10\n"
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"sw $31, 0($sp)\n"
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"sw $26, 4($sp)\n"
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"mfc0 $26, $14\n"
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"addiu $26, 4\n"
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"sw $26, 8($sp)\n"
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"mtc0 $26, $14\n"
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"sync\n");
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table_SYSCALL[code]();
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__asm__(
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"lw $26, 8($sp)\n"
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"lw $31, 0($sp)\n"
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"lw $sp, 4($sp)\n"
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"mtc0 $26, $14\n"
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"sync\n"
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"mfc0 $26, $12\n"
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"ori $26, 0x13\n"
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"mtc0 $26, $12\n"
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"sync\n"
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"eret\n"
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"nop\n");
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}
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void _Deci2Call() {
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__puts("_Deci2Call called\n");
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}
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void __ThreadHandler();
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void INTCException() {
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u32 code;
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u32 temp;
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code = INTC_STAT & INTC_MASK;
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if (code & 0xC0) {
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int VpuStat;
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__asm__("cfc2 %0, $29\n" : "=r"(VpuStat) : );
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if (VpuStat & 0x202) {
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__asm__(
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".set noat\n"
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"lui $26, %hi(SavedAT)\n"
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"lq $1, %lo(SavedAT)($26)\n"
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".set at\n");
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__exception();
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}
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}
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__asm__ (
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"mfc0 $26, $14\n"
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"li $27, 0xFFFFFFE4\n"
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"and $26, $27\n"
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"mtc0 $26, $14\n"
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"sync\n"
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LOAD_KERNELSTACK
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"addiu $sp, -0x10\n"
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"mfc0 $26, $14\n"
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"sw $26, 0($sp)\n"
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);
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saveContext2();
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__asm__ (
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"plzcw %0, %1"
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: "=r"(temp) : "r"(code)
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);
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temp = 0x1e - (temp & 0xff);
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INTC_STAT = 1 << temp;
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threadStatus = 0;
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INTCTable[temp](temp);
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restoreContext2();
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__asm__ (
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".set noat\n"
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"lw $26, 0($sp)\n"
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"mtc0 $26, $14\n"
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"lui $26, %hi(SavedSP)\n"
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"lq $sp, %lo(SavedSP)($26)\n"
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"lui $26, %hi(SavedRA)\n"
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"lq $31, %lo(SavedRA)($26)\n"
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"lui $26, %hi(SavedAT)\n"
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"lq $1, %lo(SavedAT)($26)\n"
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".set at\n"
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);
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if (!threadStatus) {
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__asm__ (
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"mfc0 $26, $12\n"
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"ori $26, 0x13\n"
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"mtc0 $26, $12\n"
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"sync\n"
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"eret\n"
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);
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}
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__asm__(LOAD_KERNELSTACK);
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threadStatus = 0;
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__ThreadHandler();
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}
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////////////////////////////////////////////////////////////////////
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//800004C0
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////////////////////////////////////////////////////////////////////
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void DMACException() {
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unsigned int code;
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unsigned int temp;
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code = (DMAC_STAT >> 16) | 0x8000;
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code&= DMAC_STAT & 0xFFFF;
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if (code & 0x80) {
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//__printf("%s: code & 0x80\n", __FUNCTION__);
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__asm__(
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".set noat\n"
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"lui $26, %hi(SavedAT)\n"
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"lq $1, %lo(SavedAT)($26)\n"
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".set at\n");
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__exception1();
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}
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__asm__ (
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"mfc0 $26, $14\n"
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"li $27, 0xFFFFFFE4\n"
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"and $26, $27\n"
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"mtc0 $26, $14\n"
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"sync\n"
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LOAD_KERNELSTACK
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"addiu $sp, -0x10\n"
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"mfc0 $26, $14\n"
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"sw $26, 0($sp)\n"
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);
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saveContext2();
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__asm__ (
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"plzcw %0, %1"
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: "=r"(temp) : "r"(code)
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);
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temp = 0x1e - (temp & 0xff);
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DMAC_STAT = 1 << temp;
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threadStatus = 0;
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DMACTable[temp](temp);
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restoreContext2();
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__asm__ (
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".set noat\n"
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"lw $26, 0($sp)\n"
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"mtc0 $26, $14\n"
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"lui $26, %hi(SavedSP)\n"
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"lq $sp, %lo(SavedSP)($26)\n"
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"lui $26, %hi(SavedRA)\n"
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"lq $31, %lo(SavedRA)($26)\n"
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"lui $26, %hi(SavedAT)\n"
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"lq $1, %lo(SavedAT)($26)\n"
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".set at\n"
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);
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if (!threadStatus) {
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__asm__ (
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"mfc0 $26, $12\n"
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"ori $26, 0x13\n"
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"mtc0 $26, $12\n"
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"sync\n"
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"eret\n"
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);
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}
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__asm__(LOAD_KERNELSTACK);
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threadStatus = 0;
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__ThreadHandler();
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}
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////////////////////////////////////////////////////////////////////
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//80000600
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////////////////////////////////////////////////////////////////////
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void TIMERException()
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{
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}
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////////////////////////////////////////////////////////////////////
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//80000700
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////////////////////////////////////////////////////////////////////
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void setINTCHandler(int n, void (*phandler)(int))
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{
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INTCTable[n] = phandler;
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}
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////////////////////////////////////////////////////////////////////
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//80000780
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////////////////////////////////////////////////////////////////////
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void setDMACHandler(int n, void (*phandler)(int))
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{
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DMACTable[n] = phandler;
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}
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