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Decompile __osSiRawStartDma

This commit is contained in:
Ryan Dwyer 2021-01-30 10:20:56 +10:00
parent c34108da8d
commit 07d8756a92
1 changed files with 24 additions and 53 deletions
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77
src/lib/ultra/io/sirawdma.c
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@ -1,55 +1,26 @@
#include <libultra_internal.h>
GLOBAL_ASM(
glabel __osSiRawStartDma
/* 4a8d0: 27bdffe8 */ addiu $sp,$sp,-24
/* 4a8d4: afbf0014 */ sw $ra,0x14($sp)
/* 4a8d8: afa5001c */ sw $a1,0x1c($sp)
/* 4a8dc: 3c0ea480 */ lui $t6,0xa480
/* 4a8e0: 8dcf0018 */ lw $t7,0x18($t6)
/* 4a8e4: 00803025 */ or $a2,$a0,$zero
/* 4a8e8: 24010001 */ addiu $at,$zero,0x1
/* 4a8ec: 31f80003 */ andi $t8,$t7,0x3
/* 4a8f0: 13000003 */ beqz $t8,.L0004a900
/* 4a8f4: 00000000 */ nop
/* 4a8f8: 1000001c */ b .L0004a96c
/* 4a8fc: 2402ffff */ addiu $v0,$zero,-1
.L0004a900:
/* 4a900: 14c10005 */ bne $a2,$at,.L0004a918
/* 4a904: 8fa4001c */ lw $a0,0x1c($sp)
/* 4a908: 24050040 */ addiu $a1,$zero,0x40
/* 4a90c: 0c012b60 */ jal osWritebackDCache
/* 4a910: afa60018 */ sw $a2,0x18($sp)
/* 4a914: 8fa60018 */ lw $a2,0x18($sp)
.L0004a918:
/* 4a918: 8fa4001c */ lw $a0,0x1c($sp)
/* 4a91c: 0c012d20 */ jal osVirtualToPhysical
/* 4a920: afa60018 */ sw $a2,0x18($sp)
/* 4a924: 8fa60018 */ lw $a2,0x18($sp)
/* 4a928: 3c19a480 */ lui $t9,0xa480
/* 4a92c: af220000 */ sw $v0,0x0($t9)
/* 4a930: 14c00006 */ bnez $a2,.L0004a94c
/* 4a934: 3c0a1fc0 */ lui $t2,0x1fc0
/* 4a938: 3c081fc0 */ lui $t0,0x1fc0
/* 4a93c: 350807c0 */ ori $t0,$t0,0x7c0
/* 4a940: 3c09a480 */ lui $t1,0xa480
/* 4a944: 10000004 */ b .L0004a958
/* 4a948: ad280004 */ sw $t0,0x4($t1)
.L0004a94c:
/* 4a94c: 354a07c0 */ ori $t2,$t2,0x7c0
/* 4a950: 3c0ba480 */ lui $t3,0xa480
/* 4a954: ad6a0010 */ sw $t2,0x10($t3)
.L0004a958:
/* 4a958: 14c00003 */ bnez $a2,.L0004a968
/* 4a95c: 8fa4001c */ lw $a0,0x1c($sp)
/* 4a960: 0c013920 */ jal osInvalDCache
/* 4a964: 24050040 */ addiu $a1,$zero,0x40
.L0004a968:
/* 4a968: 00001025 */ or $v0,$zero,$zero
.L0004a96c:
/* 4a96c: 8fbf0014 */ lw $ra,0x14($sp)
/* 4a970: 27bd0018 */ addiu $sp,$sp,0x18
/* 4a974: 03e00008 */ jr $ra
/* 4a978: 00000000 */ nop
/* 4a97c: 00000000 */ nop
);
s32 __osSiRawStartDma(s32 direction, void *dramAddr)
{
if (IO_READ(SI_STATUS_REG) & (SI_STATUS_DMA_BUSY | SI_STATUS_RD_BUSY)) {
return -1;
}
if (direction == OS_WRITE) {
osWritebackDCache(dramAddr, 64);
}
IO_WRITE(SI_DRAM_ADDR_REG, osVirtualToPhysical(dramAddr));
if (direction == OS_READ) {
IO_WRITE(SI_PIF_ADDR_RD64B_REG, 0x1fc007c0);
} else {
IO_WRITE(SI_PIF_ADDR_WR64B_REG, 0x1fc007c0);
}
if (direction == OS_READ) {
osInvalDCache(dramAddr, 64);
}
return 0;
}