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Decompile osPiRawReadIo

This commit is contained in:
Ryan Dwyer 2021-01-30 01:18:44 +10:00
parent d6273ae68b
commit 7a9869c1d3
2 changed files with 15 additions and 25 deletions
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5
src/include/PR/os_pi.h
View File

@ -83,6 +83,11 @@ typedef struct {
#define OS_MESG_PRI_NORMAL 0
#define OS_MESG_PRI_HIGH 1
#define WAIT_ON_IOBUSY(stat) \
stat = IO_READ(PI_STATUS_REG); \
while (stat & (PI_STATUS_IO_BUSY | PI_STATUS_DMA_BUSY)) \
stat = IO_READ(PI_STATUS_REG);
/* Functions */
s32 osPiStartDma(OSIoMesg *mb, s32 priority, s32 direction,

35
src/lib/ultra/io/pirawread.c
View File

@ -1,27 +1,12 @@
#include <libultra_internal.h>
GLOBAL_ASM(
glabel osPiRawReadIo
/* 52070: 3c03a460 */ lui $v1,0xa460
/* 52074: 34630010 */ ori $v1,$v1,0x10
/* 52078: 8c620000 */ lw $v0,0x0($v1)
/* 5207c: 3c188000 */ lui $t8,0x8000
/* 52080: 304e0003 */ andi $t6,$v0,0x3
/* 52084: 11c00005 */ beqz $t6,.L0005209c
/* 52088: 00000000 */ nop
/* 5208c: 8c620000 */ lw $v0,0x0($v1)
.L00052090:
/* 52090: 304f0003 */ andi $t7,$v0,0x3
/* 52094: 55e0fffe */ bnezl $t7,.L00052090
/* 52098: 8c620000 */ lw $v0,0x0($v1)
.L0005209c:
/* 5209c: 8f180308 */ lw $t8,0x308($t8)
/* 520a0: 3c01a000 */ lui $at,0xa000
/* 520a4: 00001025 */ or $v0,$zero,$zero
/* 520a8: 0304c825 */ or $t9,$t8,$a0
/* 520ac: 03214025 */ or $t0,$t9,$at
/* 520b0: 8d090000 */ lw $t1,0x0($t0)
/* 520b4: 03e00008 */ jr $ra
/* 520b8: aca90000 */ sw $t1,0x0($a1)
/* 520bc: 00000000 */ nop
);
s32 osPiRawReadIo(u32 devAddr, u32 *data)
{
register u32 stat;
WAIT_ON_IOBUSY(stat);
*data = IO_READ((u32)osRomBase | devAddr);
return 0;
}