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-rw-r--r--psp/mips_stub.S297
1 files changed, 2 insertions, 295 deletions
diff --git a/psp/mips_stub.S b/psp/mips_stub.S
index 7ca985c..031e4b5 100644
--- a/psp/mips_stub.S
+++ b/psp/mips_stub.S
@@ -2471,12 +2471,6 @@ patch_store_u32a:
patch_handler store_u32a_ftable, 0x0F
-# General ext memory routines
-
-ext_store_ignore:
- jr $ra # ignore these writes
- nop
-
write_io_epilogue:
beq $2, $0, no_alert # 0 means nothing happened
addiu $4, $2, -2 # see if return value is 2 (delay slot)
@@ -2487,6 +2481,8 @@ write_io_epilogue:
nop
collapse_flags # make sure flags are good for update_gba
+
+
alert_loop:
jal update_gba # process the next event
nop
@@ -2518,295 +2514,6 @@ smc_dma:
j lookup_pc
nop
-
-ext_store_eeprom:
- addiu $sp, $sp, -4 # make room on the stack for $ra
- sw $ra, ($sp)
- save_registers
- jal write_eeprom # write the value out
- sw $6, REG_PC($16) # save the PC (delay slot)
- restore_registers
- lw $ra, ($sp) # restore return address
- jr $ra # we can return
- addiu $sp, $sp, 4 # fix the stack
-
-
-# 8bit ext memory routines
-
-ext_store_io8:
- andi $5, $5, 0xFF # make value 8bit
- andi $4, $4, 0x3FF # wrap around address
- addiu $sp, $sp, -4 # make room on the stack for $ra
- sw $ra, ($sp)
- save_registers
- jal write_io_register8 # write the value out
- sw $6, REG_PC($16) # save the PC (delay slot)
- j write_io_epilogue # handle any state changes
- nop
-
-ext_store_palette8:
- j ext_store_palette16b # perform 16bit palette write
- andi $4, $4, 0x3FE # wrap + align (delay)
-
-ext_store_vram8:
- ins $5, $5, 8, 8 # value = (value << 8) | value
- ext $4, $4, 0, 17 # address = adress & 0x1FFFF
- ins $4, $0, 0, 1 # align out bottom bit
- lui $1, %hi(0x18000) # $1 = 0x18000
- sltu $1, $4, $1 # see if address < 0x18000
- bne $1, $0, ext_store_vram8b
- lui $2, %hi(vram) # start loading vram address (delay)
-
- addiu $4, $4, -0x8000 # move address into VRAM region
-
-ext_store_vram8b:
- addu $2, $2, $4 # $2 = (hi)vram + address
- jr $ra # return
- sh $5, %lo(vram)($2) # vram[address] = value (delay)
-
-ext_store_oam8:
- lui $1, %hi(oam_update) # $1 = oam_update
- addiu $1, %lo(oam_update)
- li $2, 1 # $2 = 1
- sw $2, ($1) # *oam_update = 1
- andi $4, $4, 0x3FE # wrap around address and align to 16bits
- ins $5, $5, 8, 8 # value = (value << 8) | value
- lui $1, %hi(oam_ram) # $1 = (hi)oam_ram
- addu $1, $1, $4 # $1 = (hi)oam_ram + address
- jr $ra # return
- sh $5, %lo(oam_ram)($1) # oam_ram[address] = value (delay)
-
-ext_store_backup:
- andi $5, $5, 0xFF # make value 8bit
- andi $4, $4, 0xFFFF # mask value
- addiu $sp, $sp, -4 # make room on the stack for $ra
- sw $ra, ($sp)
- save_registers
- jal write_backup # write the value out
- sw $6, REG_PC($16) # save the PC (delay slot)
- restore_registers
- lw $ra, ($sp) # restore return address
- jr $ra # we can return
- addiu $sp, $sp, 4 # fix the stack
-
-ext_store_u8_jtable:
- .long ext_store_ignore # 0x00 BIOS
- .long ext_store_ignore # 0x01 invalid
- .long ext_store_ignore # 0x02 EWRAM
- .long ext_store_ignore # 0x03 IWRAM
- .long ext_store_io8 # 0x04 I/O registers
- .long ext_store_palette8 # 0x05 Palette RAM
- .long ext_store_vram8 # 0x06 VRAM
- .long ext_store_oam8 # 0x07 OAM RAM
- .long ext_store_ignore # 0x08 gamepak (no RTC accepted in 8bit)
- .long ext_store_ignore # 0x09 gamepak, ignore
- .long ext_store_ignore # 0x0A gamepak, ignore
- .long ext_store_ignore # 0x0B gamepak, ignore
- .long ext_store_ignore # 0x0C gamepak, ignore
- .long ext_store_eeprom # 0x0D EEPROM (possibly)
- .long ext_store_backup # 0x0E Flash ROM/SRAM
- .long ext_store_ignore # 0x0F invalid
-
-
-# 16bit ext memory routines
-
-ext_store_io16:
- andi $4, $4, 0x3FF # wrap around address
- andi $5, $5, 0xFFFF # make value 16bit
- addiu $sp, $sp, -4 # make room on the stack for $ra
- sw $ra, ($sp)
- save_registers
- jal write_io_register16 # write the value out
- sw $6, REG_PC($16) # save the PC (delay slot)
- j write_io_epilogue # handle any state changes
- nop
-
-ext_store_palette16:
- andi $4, 0x3FF # wrap address
-
-ext_store_palette16b:
- lui $2, %hi(palette_ram)
- addu $2, $2, $4
- sh $5, %lo(palette_ram)($2) # palette_ram[address] = value
- sll $1, $5, 1 # make green 6bits
- ins $1, $0, 0, 6 # make bottom bit 0
- ins $1, $5, 0, 5 # insert red channel into $1
- lui $2, %hi(palette_ram_converted)
- addu $2, $2, $4
- jr $ra # return
- sh $1, %lo(palette_ram_converted)($2)
-
-ext_store_vram16:
- ext $4, $4, 0, 17 # address = adress & 0x1FFFF
- lui $1, %hi(0x18000) # $1 = 0x18000
- sltu $1, $4, $1 # see if address < 0x18000
- bne $1, $0, ext_store_vram16b
- lui $2, %hi(vram) # start loading vram address (delay)
-
- addiu $4, $4, -0x8000 # move address into VRAM region
-
-ext_store_vram16b:
- addu $2, $2, $4 # $2 = (hi)vram + address
- jr $ra # return
- sh $5, %lo(vram)($2) # vram[address] = value (delay)
-
-ext_store_oam16:
- lui $1, %hi(oam_update) # $1 = oam_update
- addiu $1, %lo(oam_update)
- li $2, 1 # $2 = 1
- sw $2, ($1) # *oam_update = 1
- andi $4, $4, 0x3FF # wrap around address
- lui $1, %hi(oam_ram) # $1 = (hi)oam_ram
- addu $1, $1, $4 # $1 = (hi)oam_ram + address
- jr $ra # return
- sh $5, %lo(oam_ram)($1) # oam_ram[address] = value (delay)
-
-ext_store_rtc:
- andi $5, $5, 0xFFFF # make value 16bit
- addiu $sp, $sp, -4 # make room on the stack for $ra
- sw $ra, ($sp)
- save_registers
- jal write_rtc # write the value out
- sw $6, REG_PC($16) # save the PC (delay slot)
- restore_registers
- lw $ra, ($sp) # restore return address
- jr $ra # we can return
- addiu $sp, $sp, 4 # fix the stack
-
-ext_store_u16_jtable:
- .long ext_store_ignore # 0x00 BIOS, ignore
- .long ext_store_ignore # 0x01 invalid, ignore
- .long ext_store_ignore # 0x02 EWRAM, should have been hit already
- .long ext_store_ignore # 0x03 IWRAM, should have been hit already
- .long ext_store_io16 # 0x04 I/O registers
- .long ext_store_palette16 # 0x05 Palette RAM
- .long ext_store_vram16 # 0x06 VRAM
- .long ext_store_oam16 # 0x07 OAM RAM
- .long ext_store_rtc # 0x08 gamepak, RTC
- .long ext_store_ignore # 0x09 gamepak, ignore
- .long ext_store_ignore # 0x0A gamepak, ignore
- .long ext_store_ignore # 0x0B gamepak, ignore
- .long ext_store_ignore # 0x0C gamepak, ignore
- .long ext_store_eeprom # 0x0D EEPROM (possibly)
- .long ext_store_ignore # 0x0E Flash ROM/SRAM
-
-
-
-
-# 32bit ext memory routines
-
-ext_store_io32:
- andi $4, $4, 0x3FF # wrap around address
- addiu $sp, $sp, -4 # make room on the stack for $ra
- sw $ra, ($sp)
- save_registers
- jal write_io_register32 # write the value out
- sw $6, REG_PC($16) # save the PC (delay slot)
- j write_io_epilogue # handle any state changes
- nop
-
-ext_store_palette32:
- addu $6, $ra, $0 # save return address in $6
- jal ext_store_palette16b # write out palette entry
- andi $4, 0x3FF # wrap address (delay)
- addiu $4, $4, 2 # go to next location
- srl $5, $5, 16 # shift to next 16bit value
- j ext_store_palette16b # write out next palette entry
- addu $ra, $6, $0 # restore return address (delay)
-
-ext_store_vram32:
- ext $4, $4, 0, 17 # address = adress & 0x1FFFF
- lui $1, %hi(0x18000) # $1 = 0x18000
- sltu $1, $4, $1 # see if address < 0x18000
- bne $1, $0, ext_store_vram32b
- lui $2, %hi(vram) # start loading vram address (delay)
-
- addiu $4, $4, -0x8000 # move address into VRAM region
-
-ext_store_vram32b:
- addu $2, $2, $4 # $2 = (hi)vram + address
- jr $ra # return
- sw $5, %lo(vram)($2) # vram[address] = value (delay)
-
-ext_store_oam32:
- lui $1, %hi(oam_update) # $1 = oam_update
- addiu $1, %lo(oam_update)
- li $2, 1 # $2 = 1
- sw $2, ($1) # *oam_update = 1
- andi $4, $4, 0x3FF # wrap around address
- lui $1, %hi(oam_ram) # $1 = (hi)oam_ram
- addu $1, $1, $4 # $1 = (hi)oam_ram + address
- jr $ra # return
- sw $5, %lo(oam_ram)($1) # oam_ram[address] = value (delay)
-
-ext_store_u32_jtable:
- .long ext_store_ignore # 0x00 BIOS, ignore
- .long ext_store_ignore # 0x01 invalid, ignore
- .long ext_store_ignore # 0x02 EWRAM, should have been hit already
- .long ext_store_ignore # 0x03 IWRAM, should have been hit already
- .long ext_store_io32 # 0x04 I/O registers
- .long ext_store_palette32 # 0x05 Palette RAM
- .long ext_store_vram32 # 0x06 VRAM
- .long ext_store_oam32 # 0x07 OAM RAM
- .long ext_store_ignore # 0x08 gamepak, ignore
- .long ext_store_ignore # 0x09 gamepak, ignore
- .long ext_store_ignore # 0x0A gamepak, ignore
- .long ext_store_ignore # 0x0B gamepak, ignore
- .long ext_store_ignore # 0x0C gamepak, ignore
- .long ext_store_eeprom # 0x0D EEPROM (possibly)
- .long ext_store_ignore # 0x0E Flash ROM/SRAM
-
-ext_store_u32:
- srl $1, $4, 24 # $1 = address >> 24
- sltu $2, $1, 16 # check if the value is out of range
- beq $2, $0, ext_store_ignore
- sll $1, $1, 2 # make address word indexed (delay)
- lui $2, %hi(ext_store_u32_jtable)
- addu $2, $2, $1
- # $2 = ext_store_u32_jtable[address >> 24]
- lw $2, %lo(ext_store_u32_jtable)($2)
- jr $2 # jump to table location
- nop
-
-# 32bit ext aligned, non a2 destroying routines
-
-ext_store_io32a:
- andi $4, $4, 0x3FF # wrap around address
- addiu $sp, $sp, -4 # make room on the stack for $ra
- sw $ra, ($sp)
- save_registers
- jal write_io_register32 # write the value out
- sw $6, REG_SAVE($16) # save a2
- lw $6, REG_SAVE($16) # restore a2
- j write_io_epilogue # handle any state changes
- nop
-
-ext_store_palette32a:
- sw $ra, REG_SAVE($16) # save return address
- jal ext_store_palette16b # write out palette entry
- andi $4, 0x3FF # wrap address (delay)
- addiu $4, $4, 2 # go to next location
- srl $5, $5, 16 # shift to next 16bit value
- j ext_store_palette16b # write out next palette entry
- lw $ra, REG_SAVE($16) # restore return address (delay)
-
-ext_store_u32a_jtable:
- .long ext_store_ignore # 0x00 BIOS, ignore
- .long ext_store_ignore # 0x01 invalid, ignore
- .long ext_store_ignore # 0x02 EWRAM, should have been hit already
- .long ext_store_ignore # 0x03 IWRAM, should have been hit already
- .long ext_store_io32a # 0x04 I/O registers
- .long ext_store_palette32a # 0x05 Palette RAM
- .long ext_store_vram32 # 0x06 VRAM
- .long ext_store_oam32 # 0x07 OAM RAM
- .long ext_store_ignore # 0x08 gamepak, ignore
- .long ext_store_ignore # 0x09 gamepak, ignore
- .long ext_store_ignore # 0x0A gamepak, ignore
- .long ext_store_ignore # 0x0B gamepak, ignore
- .long ext_store_ignore # 0x0C gamepak, ignore
- .long ext_store_ignore # 0x0D EEPROM (nothing will write this)
- .long ext_store_ignore # 0x0E Flash ROM/SRAM
-
smc_write:
save_registers
jal flush_translation_cache_ram # flush translation cache
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 02:06:15 +0000