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Decompile __osPfsGetOneChannelData

This commit is contained in:
Ryan Dwyer 2021-01-31 01:27:02 +10:00
parent 797ff3f340
commit ffb1a4862c
4 changed files with 125 additions and 46 deletions
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1
Makefile
View File

@ -64,6 +64,7 @@ LOOPUNROLL := -Wo,-loopunroll,0
$(B_DIR)/lib/ultra/gu/frustum.o: LOOPUNROLL :=
$(B_DIR)/lib/ultra/gu/mtxutil.o: LOOPUNROLL :=
$(B_DIR)/lib/ultra/gu/ortho.o: LOOPUNROLL :=
$(B_DIR)/lib/ultra/io/pfsgetstatus.o: LOOPUNROLL :=
$(B_DIR)/lib/ultra/libc/ll.o: MIPSISET := -mips3 -o32
$(B_DIR)/lib/ultra/libc/llcvt.o: MIPSISET := -mips3 -o32

99
src/include/PR/os_cont.h
View File

@ -71,6 +71,103 @@ typedef struct {
u8 errno;
} OSContRamIo;
typedef struct
{
/* 0x0 */ u32 ramarray[15];
/* 0x3C */ u32 pifstatus;
} OSPifRam;
typedef struct
{
/* 0x0 */ u8 dummy;
/* 0x1 */ u8 txsize;
/* 0x2 */ u8 rxsize;
/* 0x3 */ u8 cmd;
/* 0x4 */ u16 button;
/* 0x6 */ s8 stick_x;
/* 0x7 */ s8 stick_y;
} __OSContReadFormat;
typedef struct
{
/* 0x0 */ u8 dummy;
/* 0x1 */ u8 txsize;
/* 0x2 */ u8 rxsize;
/* 0x3 */ u8 cmd;
/* 0x4 */ u8 typeh;
/* 0x5 */ u8 typel;
/* 0x6 */ u8 status;
/* 0x7 */ u8 dummy1;
} __OSContRequestFormat;
typedef struct
{
/* 0x0 */ u8 txsize;
/* 0x1 */ u8 rxsize;
/* 0x2 */ u8 cmd;
/* 0x3 */ u8 typeh;
/* 0x4 */ u8 typel;
/* 0x5 */ u8 status;
} __OSContRequestFormatShort;
typedef struct
{
/* 0x0 */ u8 dummy;
/* 0x1 */ u8 txsize;
/* 0x2 */ u8 rxsize;
/* 0x3 */ u8 cmd;
/* 0x4 */ u16 address;
/* 0x6 */ u8 data[BLOCKSIZE];
/* 0x26 */ u8 datacrc;
} __OSContRamReadFormat;
typedef union {
/* 0x0 */ struct
{
/* 0x0 */ u8 bank;
/* 0x1 */ u8 page;
} inode_t;
/* 0x0 */ u16 ipage;
} __OSInodeUnit;
typedef struct
{
/* 0x0 */ u32 game_code;
/* 0x4 */ u16 company_code;
/* 0x6 */ __OSInodeUnit start_page;
/* 0x8 */ u8 status;
/* 0x9 */ s8 reserved;
/* 0xA */ u16 data_sum;
/* 0xC */ u8 ext_name[16];
/* 0x10 */ u8 game_name[4];
} __OSDir;
typedef struct
{
/* 0x0 */ __OSInodeUnit inode_page[128];
} __OSInode;
typedef struct
{
/* 0x0 */ u32 repaired;
/* 0x4 */ u32 random;
/* 0x8 */ u64 serial_mid;
/* 0x10 */ u64 serial_low;
/* 0x18 */ u16 deviceid;
/* 0x1A */ u8 banks;
/* 0x1B */ u8 version;
/* 0x1C */ u16 checksum;
/* 0x1E */ u16 inverted_checksum;
} __OSPackId;
typedef struct
{
/* 0x0 */ u8 txsize;
/* 0x1 */ u8 rxsize;
/* 0x2 */ u8 cmd;
/* 0x3 */ u8 address;
/* 0x4 */ u8 data[EEPROM_BLOCK_SIZE];
} __OSContEepromFormat;
#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */
@ -194,6 +291,8 @@ typedef struct {
#define DIR_STATUS_UNKNOWN 1
#define DIR_STATUS_OCCUPIED 2
#define CHNL_ERR(format) ((format.rxsize & CHNL_ERR_MASK) >> 4)
#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)
/**************************************************************************

4
src/include/PR/os_misc.h
View File

@ -93,6 +93,10 @@ typedef char *va_list;
: __va_stack_arg(list, mode))))[-1]
#define va_end(__list)
#define EEPROM_MAXBLOCKS 64
#define EEP16K_MAXBLOCKS 256
#define EEPROM_BLOCK_SIZE 8
/* Miscellaneous OS functions */
void osInitialize(void);

67
src/lib/ultra/io/pfsgetstatus.c
View File

@ -1,4 +1,5 @@
#include <libultra_internal.h>
#include "gvars/gvars.h"
GLOBAL_ASM(
glabel __osPfsGetStatus
@ -116,49 +117,23 @@ glabel __osPfsRequestOneChannel
/* 4bc20: a04dffff */ sb $t5,-0x1($v0)
);
GLOBAL_ASM(
glabel __osPfsGetOneChannelData
/* 4bc24: 3c028009 */ lui $v0,%hi(__osPfsPifRam)
/* 4bc28: 27bdffe8 */ addiu $sp,$sp,-24
/* 4bc2c: 24420a20 */ addiu $v0,$v0,%lo(__osPfsPifRam)
/* 4bc30: 1880000b */ blez $a0,.L0004bc60
/* 4bc34: 00001825 */ or $v1,$zero,$zero
/* 4bc38: 30870003 */ andi $a3,$a0,0x3
/* 4bc3c: 10e00005 */ beqz $a3,.L0004bc54
/* 4bc40: 00e03025 */ or $a2,$a3,$zero
.L0004bc44:
/* 4bc44: 24630001 */ addiu $v1,$v1,0x1
/* 4bc48: 14c3fffe */ bne $a2,$v1,.L0004bc44
/* 4bc4c: 24420001 */ addiu $v0,$v0,0x1
/* 4bc50: 10640003 */ beq $v1,$a0,.L0004bc60
.L0004bc54:
/* 4bc54: 24630004 */ addiu $v1,$v1,0x4
/* 4bc58: 1464fffe */ bne $v1,$a0,.L0004bc54
/* 4bc5c: 24420004 */ addiu $v0,$v0,0x4
.L0004bc60:
/* 4bc60: 88410000 */ lwl $at,0x0($v0)
/* 4bc64: 98410003 */ lwr $at,0x3($v0)
/* 4bc68: 27ae000c */ addiu $t6,$sp,0xc
/* 4bc6c: adc10000 */ sw $at,0x0($t6)
/* 4bc70: 90410004 */ lbu $at,0x4($v0)
/* 4bc74: a1c10004 */ sb $at,0x4($t6)
/* 4bc78: 90580005 */ lbu $t8,0x5($v0)
/* 4bc7c: a1d80005 */ sb $t8,0x5($t6)
/* 4bc80: 93b9000d */ lbu $t9,0xd($sp)
/* 4bc84: 332800c0 */ andi $t0,$t9,0xc0
/* 4bc88: 00084903 */ sra $t1,$t0,0x4
/* 4bc8c: 312a00ff */ andi $t2,$t1,0xff
/* 4bc90: 15400008 */ bnez $t2,.L0004bcb4
/* 4bc94: a0a90003 */ sb $t1,0x3($a1)
/* 4bc98: 93ab0010 */ lbu $t3,0x10($sp)
/* 4bc9c: 93ad000f */ lbu $t5,0xf($sp)
/* 4bca0: 000b6200 */ sll $t4,$t3,0x8
/* 4bca4: 018d7825 */ or $t7,$t4,$t5
/* 4bca8: a4af0000 */ sh $t7,0x0($a1)
/* 4bcac: 93ae0011 */ lbu $t6,0x11($sp)
/* 4bcb0: a0ae0002 */ sb $t6,0x2($a1)
.L0004bcb4:
/* 4bcb4: 03e00008 */ jr $ra
/* 4bcb8: 27bd0018 */ addiu $sp,$sp,0x18
/* 4bcbc: 00000000 */ nop
);
void __osPfsGetOneChannelData(int channel, OSContStatus *data)
{
u8 *ptr;
__OSContRequestFormatShort requestformat;
int i;
ptr = (u8*)&__osPfsPifRam;
for (i = 0; i < channel; i++) {
ptr++;
}
requestformat = *(__OSContRequestFormatShort *)ptr;
data->errno = CHNL_ERR(requestformat);
if (data->errno == 0) {
data->type = (requestformat.typel << 8) | (requestformat.typeh);
data->status = requestformat.status;
}
}