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Decompile osPiStartDma

This commit is contained in:
Ryan Dwyer 2021-03-16 23:38:52 +10:00
parent 256aea7887
commit 2da23852f6
2 changed files with 30 additions and 76 deletions
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1
Makefile
View File

@ -77,6 +77,7 @@ $(B_DIR)/lib/ultra/io/conteeplongread.o: OPT_LVL := -O1
$(B_DIR)/lib/ultra/io/contquery.o: OPT_LVL := -O1
$(B_DIR)/lib/ultra/io/dpctr.o: OPT_LVL := -O1
$(B_DIR)/lib/ultra/io/pigetcmdq.o: OPT_LVL := -O1
$(B_DIR)/lib/ultra/io/pidma.o: OPT_LVL := -O1
$(B_DIR)/lib/ultra/io/si.o: OPT_LVL := -O1
$(B_DIR)/lib/ultra/io/sp.o: OPT_LVL := -O1
$(B_DIR)/lib/ultra/io/spsetpc.o: OPT_LVL := -O1

105
src/lib/ultra/io/pidma.c
View File

@ -1,79 +1,32 @@
#include <libultra_internal.h>
#include "data.h"
GLOBAL_ASM(
glabel osPiStartDma
/* 4e530: 27bdffd8 */ addiu $sp,$sp,-40
/* 4e534: 3c0e8006 */ lui $t6,%hi(__osPiDevMgr)
/* 4e538: 8dcecf00 */ lw $t6,%lo(__osPiDevMgr)($t6)
/* 4e53c: afbf001c */ sw $ra,0x1c($sp)
/* 4e540: afa40028 */ sw $a0,0x28($sp)
/* 4e544: afa5002c */ sw $a1,0x2c($sp)
/* 4e548: afa60030 */ sw $a2,0x30($sp)
/* 4e54c: afa70034 */ sw $a3,0x34($sp)
/* 4e550: afb10018 */ sw $s1,0x18($sp)
/* 4e554: 15c00003 */ bnez $t6,.L0004e564
/* 4e558: afb00014 */ sw $s0,0x14($sp)
/* 4e55c: 10000032 */ b .L0004e628
/* 4e560: 2402ffff */ addiu $v0,$zero,-1
.L0004e564:
/* 4e564: 8faf0030 */ lw $t7,0x30($sp)
/* 4e568: 15e00005 */ bnez $t7,.L0004e580
/* 4e56c: 00000000 */ nop
/* 4e570: 8fb90028 */ lw $t9,0x28($sp)
/* 4e574: 2418000b */ addiu $t8,$zero,0xb
/* 4e578: 10000004 */ b .L0004e58c
/* 4e57c: a7380000 */ sh $t8,0x0($t9)
.L0004e580:
/* 4e580: 8fa90028 */ lw $t1,0x28($sp)
/* 4e584: 2408000c */ addiu $t0,$zero,0xc
/* 4e588: a5280000 */ sh $t0,0x0($t1)
.L0004e58c:
/* 4e58c: 8faa002c */ lw $t2,0x2c($sp)
/* 4e590: 8fab0028 */ lw $t3,0x28($sp)
/* 4e594: 24010001 */ addiu $at,$zero,0x1
/* 4e598: a16a0002 */ sb $t2,0x2($t3)
/* 4e59c: 8fad0028 */ lw $t5,0x28($sp)
/* 4e5a0: 8fac0040 */ lw $t4,0x40($sp)
/* 4e5a4: adac0004 */ sw $t4,0x4($t5)
/* 4e5a8: 8faf0028 */ lw $t7,0x28($sp)
/* 4e5ac: 8fae0038 */ lw $t6,0x38($sp)
/* 4e5b0: adee0008 */ sw $t6,0x8($t7)
/* 4e5b4: 8fb90028 */ lw $t9,0x28($sp)
/* 4e5b8: 8fb80034 */ lw $t8,0x34($sp)
/* 4e5bc: af38000c */ sw $t8,0xc($t9)
/* 4e5c0: 8fa90028 */ lw $t1,0x28($sp)
/* 4e5c4: 8fa8003c */ lw $t0,0x3c($sp)
/* 4e5c8: ad280010 */ sw $t0,0x10($t1)
/* 4e5cc: 8faa0028 */ lw $t2,0x28($sp)
/* 4e5d0: ad400014 */ sw $zero,0x14($t2)
/* 4e5d4: 8fab002c */ lw $t3,0x2c($sp)
/* 4e5d8: 1561000a */ bne $t3,$at,.L0004e604
/* 4e5dc: 00000000 */ nop
/* 4e5e0: 0c014810 */ jal osPiGetCmdQueue
/* 4e5e4: 00000000 */ nop
/* 4e5e8: 00408825 */ or $s1,$v0,$zero
/* 4e5ec: 02202025 */ or $a0,$s1,$zero
/* 4e5f0: 8fa50028 */ lw $a1,0x28($sp)
/* 4e5f4: 0c0147bc */ jal osJamMesg
/* 4e5f8: 00003025 */ or $a2,$zero,$zero
/* 4e5fc: 10000009 */ b .L0004e624
/* 4e600: 00408025 */ or $s0,$v0,$zero
.L0004e604:
/* 4e604: 0c014810 */ jal osPiGetCmdQueue
/* 4e608: 00000000 */ nop
/* 4e60c: 00408825 */ or $s1,$v0,$zero
/* 4e610: 02202025 */ or $a0,$s1,$zero
/* 4e614: 8fa50028 */ lw $a1,0x28($sp)
/* 4e618: 0c012238 */ jal osSendMesg
/* 4e61c: 00003025 */ or $a2,$zero,$zero
/* 4e620: 00408025 */ or $s0,$v0,$zero
.L0004e624:
/* 4e624: 02001025 */ or $v0,$s0,$zero
.L0004e628:
/* 4e628: 8fbf001c */ lw $ra,0x1c($sp)
/* 4e62c: 8fb00014 */ lw $s0,0x14($sp)
/* 4e630: 8fb10018 */ lw $s1,0x18($sp)
/* 4e634: 03e00008 */ jr $ra
/* 4e638: 27bd0028 */ addiu $sp,$sp,0x28
);
s32 osPiStartDma(OSIoMesg *mb, s32 priority, s32 direction, u32 devAddr, void *dramAddr, u32 size, OSMesgQueue *mq)
{
register s32 ret;
if (!__osPiDevMgr.active) {
return -1;
}
if (direction == OS_READ) {
mb->hdr.type = OS_MESG_TYPE_DMAREAD;
} else {
mb->hdr.type = OS_MESG_TYPE_DMAWRITE;
}
mb->hdr.pri = priority;
mb->hdr.retQueue = mq;
mb->dramAddr = dramAddr;
mb->devAddr = devAddr;
mb->size = size;
mb->piHandle = NULL;
if (priority == OS_MESG_PRI_HIGH) {
ret = osJamMesg(osPiGetCmdQueue(), (OSMesg)mb, OS_MESG_NOBLOCK);
} else {
ret = osSendMesg(osPiGetCmdQueue(), (OSMesg)mb, OS_MESG_NOBLOCK);
}
return ret;
}