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Decompile osPiRawStartDma

This commit is contained in:
Ryan Dwyer 2021-01-30 10:22:15 +10:00
parent 07d8756a92
commit 5c7193c4a3
1 changed files with 22 additions and 61 deletions
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83
src/lib/ultra/io/pirawdma.c
View File

@ -1,63 +1,24 @@
#include <libultra_internal.h>
GLOBAL_ASM(
glabel osPiRawStartDma
/* 49b50: 27bdffe8 */ addiu $sp,$sp,-24
/* 49b54: 3c03a460 */ lui $v1,0xa460
/* 49b58: 34630010 */ ori $v1,$v1,0x10
/* 49b5c: afbf0014 */ sw $ra,0x14($sp)
/* 49b60: afa40018 */ sw $a0,0x18($sp)
/* 49b64: afa5001c */ sw $a1,0x1c($sp)
/* 49b68: 8c620000 */ lw $v0,0x0($v1)
/* 49b6c: 00c02025 */ or $a0,$a2,$zero
/* 49b70: 304e0003 */ andi $t6,$v0,0x3
/* 49b74: 11c00005 */ beqz $t6,.L00049b8c
/* 49b78: 00000000 */ nop
/* 49b7c: 8c620000 */ lw $v0,0x0($v1)
.L00049b80:
/* 49b80: 304f0003 */ andi $t7,$v0,0x3
/* 49b84: 55e0fffe */ bnezl $t7,.L00049b80
/* 49b88: 8c620000 */ lw $v0,0x0($v1)
.L00049b8c:
/* 49b8c: 0c012d20 */ jal osVirtualToPhysical
/* 49b90: afa70024 */ sw $a3,0x24($sp)
/* 49b94: 8fa30018 */ lw $v1,0x18($sp)
/* 49b98: 8fa70024 */ lw $a3,0x24($sp)
/* 49b9c: 3c18a460 */ lui $t8,0xa460
/* 49ba0: af020000 */ sw $v0,0x0($t8)
/* 49ba4: 3c198000 */ lui $t9,0x8000
/* 49ba8: 8f390308 */ lw $t9,0x308($t9)
/* 49bac: 8fa8001c */ lw $t0,0x1c($sp)
/* 49bb0: 3c011fff */ lui $at,0x1fff
/* 49bb4: 3421ffff */ ori $at,$at,0xffff
/* 49bb8: 03284825 */ or $t1,$t9,$t0
/* 49bbc: 01215024 */ and $t2,$t1,$at
/* 49bc0: 3c0ba460 */ lui $t3,0xa460
/* 49bc4: 10600006 */ beqz $v1,.L00049be0
/* 49bc8: ad6a0004 */ sw $t2,0x4($t3)
/* 49bcc: 24010001 */ addiu $at,$zero,0x1
/* 49bd0: 10610007 */ beq $v1,$at,.L00049bf0
/* 49bd4: 24eeffff */ addiu $t6,$a3,-1
/* 49bd8: 1000000b */ b .L00049c08
/* 49bdc: 2402ffff */ addiu $v0,$zero,-1
.L00049be0:
/* 49be0: 24ecffff */ addiu $t4,$a3,-1
/* 49be4: 3c0da460 */ lui $t5,0xa460
/* 49be8: 10000006 */ b .L00049c04
/* 49bec: adac000c */ sw $t4,0xc($t5)
.L00049bf0:
/* 49bf0: 3c0fa460 */ lui $t7,0xa460
/* 49bf4: 10000003 */ b .L00049c04
/* 49bf8: adee0008 */ sw $t6,0x8($t7)
/* 49bfc: 10000002 */ b .L00049c08
/* 49c00: 2402ffff */ addiu $v0,$zero,-1
.L00049c04:
/* 49c04: 00001025 */ or $v0,$zero,$zero
.L00049c08:
/* 49c08: 8fbf0014 */ lw $ra,0x14($sp)
/* 49c0c: 27bd0018 */ addiu $sp,$sp,0x18
/* 49c10: 03e00008 */ jr $ra
/* 49c14: 00000000 */ nop
/* 49c18: 00000000 */ nop
/* 49c1c: 00000000 */ nop
);
s32 osPiRawStartDma(s32 direction, u32 devAddr, void *dramAddr, u32 size)
{
register u32 stat;
WAIT_ON_IOBUSY(stat);
IO_WRITE(PI_DRAM_ADDR_REG, osVirtualToPhysical(dramAddr));
IO_WRITE(PI_CART_ADDR_REG, K1_TO_PHYS((u32)osRomBase | devAddr));
switch (direction) {
case OS_READ:
IO_WRITE(PI_WR_LEN_REG, size - 1);
break;
case OS_WRITE:
IO_WRITE(PI_RD_LEN_REG, size - 1);
break;
default:
return -1;
}
return 0;
}