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Decompile osCartRomInit

This commit is contained in:
Ryan Dwyer 2021-11-02 22:36:42 +10:00
parent 7937200efb
commit e9d1cecfb9
1 changed files with 23 additions and 33 deletions
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56
src/lib/ultra/os/initialize.c
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@ -50,7 +50,7 @@ void osInitialize(void)
osWritebackDCache((void *)UT_VEC, E_VEC - UT_VEC + sizeof(__osExceptionVector));
osInvalICache((void *)UT_VEC, E_VEC - UT_VEC + sizeof(__osExceptionVector));
func00005dc0();
osCartRomInit();
osMapTLBRdb();
#if !PAL
@ -90,35 +90,25 @@ void osInitialize(void)
*(u32 *)PHYS_TO_K1(AI_BITRATE_REG) = 0xf;
}
GLOBAL_ASM(
glabel func00005dc0
/* 5dc0: 3c028009 */ lui $v0,%hi(CartRomHandle)
/* 5dc4: 244202a0 */ addiu $v0,$v0,%lo(CartRomHandle)
/* 5dc8: 24030007 */ addiu $v1,$zero,0x7
/* 5dcc: a0430004 */ sb $v1,0x4($v0)
/* 5dd0: 3c0ea460 */ lui $t6,0xa460
/* 5dd4: 8dcf0014 */ lw $t7,0x14($t6)
/* 5dd8: 3c18a460 */ lui $t8,0xa460
/* 5ddc: 3c08a460 */ lui $t0,0xa460
/* 5de0: a04f0005 */ sb $t7,0x5($v0)
/* 5de4: 8f190018 */ lw $t9,0x18($t8)
/* 5de8: 3c0aa460 */ lui $t2,0xa460
/* 5dec: 3c048009 */ lui $a0,%hi(LeoDiskHandle)
/* 5df0: a0590008 */ sb $t9,0x8($v0)
/* 5df4: 8d09001c */ lw $t1,0x1c($t0)
/* 5df8: 24840318 */ addiu $a0,$a0,%lo(LeoDiskHandle)
/* 5dfc: 3c0ca460 */ lui $t4,0xa460
/* 5e00: a0490006 */ sb $t1,0x6($v0)
/* 5e04: 8d4b0020 */ lw $t3,0x20($t2)
/* 5e08: a0830004 */ sb $v1,0x4($a0)
/* 5e0c: a04b0007 */ sb $t3,0x7($v0)
/* 5e10: 8d8d0024 */ lw $t5,0x24($t4)
/* 5e14: a08d0005 */ sb $t5,0x5($a0)
/* 5e18: 8dcf0028 */ lw $t7,0x28($t6)
/* 5e1c: a08f0008 */ sb $t7,0x8($a0)
/* 5e20: 8f19002c */ lw $t9,0x2c($t8)
/* 5e24: a0990006 */ sb $t9,0x6($a0)
/* 5e28: 8d090030 */ lw $t1,0x30($t0)
/* 5e2c: 03e00008 */ jr $ra
/* 5e30: a0890007 */ sb $t1,0x7($a0)
);
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 *osCartRomInit(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);
}