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Decompile osCartRomInit2

This commit is contained in:
Ryan Dwyer 2021-11-02 22:38:41 +10:00
parent e9d1cecfb9
commit 8a8b762c10
1 changed files with 25 additions and 45 deletions
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70
src/lib/ultra/os/initialize2.c
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@ -127,7 +127,7 @@ glabel osInitialize2
/* 51934: 3c048000 */ lui $a0,0x8000
/* 51938: 0c011e94 */ jal osInvalICache
/* 5193c: 24050190 */ li $a1,0x190
/* 51940: 0c01469a */ jal func00051a68pf
/* 51940: 0c01469a */ jal osCartRomInit2
/* 51944: 00000000 */ nop
/* 51948: 0c014820 */ jal osUnmapTLBAll
/* 5194c: 00000000 */ nop
@ -209,7 +209,7 @@ glabel osInitialize2
/* 51a64: 00000000 */ nop
);
void func00051a68pf(void);
OSPiHandle *osCartRomInit2(void);
// Mismatch: write to osClockRate needs to reuse $at, which happens if
// osClockRate is defined in this file, but it's writing to the one over in
@ -235,7 +235,7 @@ void func00051a68pf(void);
// osWritebackDCache((void *)UT_VEC, E_VEC - UT_VEC + sizeof(__osExceptionVector));
// osInvalICache((void *)UT_VEC, E_VEC - UT_VEC + sizeof(__osExceptionVector));
//
// func00051a68pf();
// osCartRomInit2();
// osUnmapTLBAll();
// osMapTLBRdb();
//
@ -262,45 +262,25 @@ void func00051a68pf(void);
// *(u32 *)PHYS_TO_K1(AI_BITRATE_REG) = 0xf;
//}
GLOBAL_ASM(
glabel func00051a68pf
/* 51a68: 240e0007 */ li $t6,0x7
/* 51a6c: 3c018009 */ lui $at,0x8009
/* 51a70: a02e07f4 */ sb $t6,0x7f4($at)
/* 51a74: 3c0fa460 */ lui $t7,0xa460
/* 51a78: 8df80014 */ lw $t8,0x14($t7)
/* 51a7c: 3c018009 */ lui $at,0x8009
/* 51a80: 3c19a460 */ lui $t9,0xa460
/* 51a84: a03807f5 */ sb $t8,0x7f5($at)
/* 51a88: 8f280018 */ lw $t0,0x18($t9)
/* 51a8c: 3c018009 */ lui $at,0x8009
/* 51a90: 3c09a460 */ lui $t1,0xa460
/* 51a94: a02807f8 */ sb $t0,0x7f8($at)
/* 51a98: 8d2a001c */ lw $t2,0x1c($t1)
/* 51a9c: 3c018009 */ lui $at,0x8009
/* 51aa0: 3c0ba460 */ lui $t3,0xa460
/* 51aa4: a02a07f6 */ sb $t2,0x7f6($at)
/* 51aa8: 8d6c0020 */ lw $t4,0x20($t3)
/* 51aac: 3c018009 */ lui $at,0x8009
/* 51ab0: 240d0007 */ li $t5,0x7
/* 51ab4: a02c07f7 */ sb $t4,0x7f7($at)
/* 51ab8: 3c018009 */ lui $at,0x8009
/* 51abc: a02d086c */ sb $t5,0x86c($at)
/* 51ac0: 3c0ea460 */ lui $t6,0xa460
/* 51ac4: 8dcf0024 */ lw $t7,0x24($t6)
/* 51ac8: 3c018009 */ lui $at,0x8009
/* 51acc: 3c18a460 */ lui $t8,0xa460
/* 51ad0: a02f086d */ sb $t7,0x86d($at)
/* 51ad4: 8f190028 */ lw $t9,0x28($t8)
/* 51ad8: 3c018009 */ lui $at,0x8009
/* 51adc: 3c08a460 */ lui $t0,0xa460
/* 51ae0: a0390870 */ sb $t9,0x870($at)
/* 51ae4: 8d09002c */ lw $t1,0x2c($t0)
/* 51ae8: 3c018009 */ lui $at,0x8009
/* 51aec: 3c0aa460 */ lui $t2,0xa460
/* 51af0: a029086e */ sb $t1,0x86e($at)
/* 51af4: 8d4b0030 */ lw $t3,0x30($t2)
/* 51af8: 3c018009 */ lui $at,0x8009
/* 51afc: 03e00008 */ jr $ra
/* 51b00: a02b086f */ sb $t3,0x86f($at)
);
extern OSPiHandle CartRomHandle;
extern OSPiHandle LeoDiskHandle;
/**
* According to Nintendo's SDK this function should return a pointer to an
* OSPiHandle, but the function only matches if the return statement is omitted.
* By chance the value in v0 happens to be &CartRomHandle anyway.
*/
OSPiHandle *osCartRomInit2(void)
{
CartRomHandle.type = DEVICE_TYPE_INIT;
CartRomHandle.latency = IO_READ(0xa4600014);
CartRomHandle.pulse = IO_READ(0xa4600018);
CartRomHandle.pageSize = IO_READ(0xa460001c);
CartRomHandle.relDuration = IO_READ(0xa4600020);
LeoDiskHandle.type = DEVICE_TYPE_INIT;
LeoDiskHandle.latency = IO_READ(0xa4600024);
LeoDiskHandle.pulse = IO_READ(0xa4600028);
LeoDiskHandle.pageSize = IO_READ(0xa460002c);
LeoDiskHandle.relDuration = IO_READ(0xa4600030);
}