diff options
Diffstat (limited to 'psp/mips_stub.S')
| -rw-r--r-- | psp/mips_stub.S | 2338 |
1 files changed, 85 insertions, 2253 deletions
diff --git a/psp/mips_stub.S b/psp/mips_stub.S index 1b24b0d..2d40bf8 100644 --- a/psp/mips_stub.S +++ b/psp/mips_stub.S @@ -23,16 +23,6 @@ .global mips_indirect_branch_arm .global mips_indirect_branch_thumb .global mips_indirect_branch_dual -.global execute_load_u8 -.global execute_load_u16 -.global execute_load_u32 -.global execute_load_s8 -.global execute_load_s16 -.global execute_store_u8 -.global execute_store_u16 -.global execute_store_u32 -.global execute_aligned_load32 -.global execute_aligned_store32 .global execute_read_cpsr .global execute_read_spsr .global execute_swi @@ -43,14 +33,21 @@ .global execute_lsr_flags_reg .global execute_asr_flags_reg .global execute_ror_flags_reg -.global execute_arm_translate +.global execute_arm_translate_internal .global icache_region_sync .global reg_check .global palette_ram .global palette_ram_converted +.global init_emitter +.global mips_lookup_pc +.global smc_write +.global write_io_epilogue .global memory_map_read .global memory_map_write +.global tmemld +.global tmemst +.global tmemst .global reg .global spsr .global reg_mode @@ -105,7 +102,6 @@ .equ REG_R12, (12 * 4) .equ REG_R13, (13 * 4) .equ REG_R14, (14 * 4) -.equ REG_LR, (14 * 4) .equ REG_PC, (15 * 4) .equ REG_N_FLAG, (16 * 4) .equ REG_Z_FLAG, (17 * 4) @@ -125,6 +121,7 @@ .equ REGMODE_BASE, (0x900 + 24) .equ SUPERVISOR_SPSR, (3 * 4 + SPSR_BASE) .equ SUPERVISOR_LR, ((3 * (7 * 4)) + (6 * 4) + REGMODE_BASE) +.equ FNPTRS_BASE, (0x900 + 220 + 960) .set noat .set noreorder @@ -201,6 +198,22 @@ lw $30, REG_R14($16) .endm +# PIC ABI mandates to jump to target via $t9 + +#ifdef PIC +.macro cfncall target, targetid + lw $t9, (FNPTRS_BASE + \targetid * 4)($16) + jalr $t9 + nop +.endm +#else +.macro cfncall target, targetid + jal \target + nop +.endm +#endif + + # Process a hardware event. Since an interrupt might be # raised we have to check if the PC has changed. @@ -218,8 +231,8 @@ mips_update_gba: sw $ra, REG_SAVE2($16) # save return addr collapse_flags # update cpsr save_registers # save registers - jal update_gba # process the next event sw $0, CHANGED_PC_STATUS($16) + cfncall update_gba, 0 # process the next event lw $1, COMPLETED_FRAME($16) # Check whether we completed a frame bne $1, $0, return_to_main # Return to main thread now @@ -262,2220 +275,25 @@ return_to_main: mips_indirect_branch_arm: save_registers - jal block_lookup_address_arm # $2 = MIPS address to jump to - nop + cfncall block_lookup_address_arm, 1 restore_registers - jr $2 # jump to it + jr $2 # $2 = value returned nop mips_indirect_branch_thumb: save_registers - jal block_lookup_address_thumb # $2 = MIPS address to jump to - nop + cfncall block_lookup_address_thumb, 2 restore_registers - jr $2 # jump to it + jr $2 # $2 = value returned nop mips_indirect_branch_dual: save_registers - jal block_lookup_address_dual # $2 = MIPS address to jump to + cfncall block_lookup_address_dual, 3 nop restore_registers - jr $2 # jump to it - nop - - -# $4: address to write to -# $5: current PC - -# Will patch the return address with a call to the correct handler as -# listed in the given table. - -# Value will be set to force_open if it's open - -.macro patch_handler ftable, force_open - srl $1, $4, 24 # $1 = address region - sltu $2, $1, 0x0F # check if the value is open - bne $2, $0, 1f - sll $1, $1, 2 # make address word indexed (delay) - - addiu $1, $0, (\force_open * 4) - -1: - lui $2, %hi(\ftable) - addu $2, $2, $1 - lw $2, %lo(\ftable)($2) # new function handler is in $2 - sll $1, $2, 4 # shift left by 4 (6 LSB are zero) - ori $1, $1, 3 # Insert the opcode in the LSB - ror $1, $1, 6 # Rotate to the opcode is now in the MSB - - sw $1, -8($ra) # Overwrite jal instruction w/ new handler - - cache 0x1a, -8($ra) # hit writeback dcache line - cache 0x08, -8($ra) # hit invalidate icache line - jr $2 # Jump to new handler directly - nop - -.endm - - -# Like the above, but will use the table of the proper alignment, -# The tables should be ordered by alignment - -.macro patch_handler_align ftable, alignment - srl $1, $4, 24 # $1 = address region - sltu $2, $1, 0x0F # check if the value is open - bne $2, $0, 1f - sll $1, $1, 2 # make address word indexed (delay) - - addiu $1, $0, 4 # force address to 0x1 (open) - -1: - ins $1, $4, 6, \alignment # place alignment bits into offset - lui $2, %hi(\ftable) - - addu $2, $2, $1 - lw $2, %lo(\ftable)($2) # new function handler is in $2 - - sll $1, $2, 4 # Build the new JAL instruction - ori $1, $1, 3 # same as above. - ror $1, $1, 6 - - sw $1, -8($ra) # modify to call new handler - - cache 0x1a, -8($ra) # hit writeback dcache line - cache 0x08, -8($ra) # hit invalidate icache line - jr $2 # Jump to new handler - nop - -.endm - - -.macro region_check region, patch_handler - srl $1, $4, 24 # check upper 8bits of address - xor $1, $1, \region # see if it is the given region - bne $1, $0, \patch_handler # if not repatch/try again -.endm - -.macro region_check_open patch_handler - srl $1, $4, 24 # check upper 8bits of address - sltiu $2, $1, 0x0F # true if it is a low address - addiu $1, $1, -1 # non-zero if it is not a low open - sltu $1, $0, $1 # true if lower bits != 1 - and $1, $1, $2 # true if low address and not open - bne $1, $0, \patch_handler # if above is true, patch -.endm - - -.macro region_check_align region, align_bits, alignment, patch_handler - srl $1, $4, 24 # check upper 8bits of address - ins $1, $4, 8, \align_bits # look at lower bits of address too - # See if it is the given region and alignment - xori $1, $1, (\region | (\alignment << 8)) - bne $1, $0, \patch_handler # if not repatch/try again -.endm - -.macro region_check_open_align align_bits, alignment, patch_handler - srl $1, $4, 24 # check upper 8bits of address - sltiu $2, $1, 0x0F # true if it is a low address - addiu $1, $1, -1 # non-zero if it is not a low open - sltu $1, $0, $1 # true if $1 != 0 - and $1, $1, $2 # true if low address and not open - ext $2, $4, 0, \align_bits # $2 = low bits of 4 - xori $2, $2, \alignment # true if alignment doesn't match - or $1, $1, $2 # align failure will trigger too - bne $1, $0, \patch_handler # if above is true, patch -.endm - - -.macro ignore_region region, patch_handler - region_check \region, \patch_handler - nop - jr $ra - nop -.endm - -.macro ignore_high patch_handler - srl $1, $4, 24 # check upper 8bits of address - sltiu $1, $1, 0x0F # see if it is not high - bne $1, $0, \patch_handler # if not repatch/try again - nop - jr $ra - nop -.endm - - -.macro translate_region_core base, size - lui $2, %hi(\base) # generate upper address - andi $4, $4, \size # generate offset - addu $2, $2, $4 # add ptr upper and offset -.endm - -.macro translate_region region, patch_handler, base, size - region_check \region, \patch_handler - translate_region_core \base, \size -.endm - -# I refuse to have > 80 char lines, and GAS has a problem with the param -# list spilling over (grumble) - -.macro translate_region_align region, a_b, alignment, p_h, base, size - region_check_align \region, \a_b, \alignment, \p_h - translate_region_core \base, \size -.endm - - -.macro translate_region_ewram_core mask - lui $2, %hi(ewram + 0x8000) # generate upper address (delay) - andi $1, $4, \mask # generate 15bit offset - ext $4, $4, 15, 3 # isolate top 3 bits of offset - ins $1, $4, 16, 3 # reinsert into top 4 bits - addu $2, $2, $1 -.endm - -.macro translate_region_ewram patch_handler - region_check 2, \patch_handler - translate_region_ewram_core 0x7FFF -.endm - -.macro translate_region_ewram_load_align align_bits, alignment, patch_handler - region_check_align 2, \align_bits, \alignment, \patch_handler - translate_region_ewram_core 0x7FFF -.endm - -.macro translate_region_ewram_load_align16 align_bits, alignment, patch_handler - region_check_align 2, \align_bits, \alignment, \patch_handler - translate_region_ewram_core 0x7FFE -.endm - -.macro translate_region_ewram_load_align32 align_bits, alignment, patch_handler - region_check_align 2, \align_bits, \alignment, \patch_handler - translate_region_ewram_core 0x7FFC -.endm - -.macro translate_region_ewram_store_align16 patch_handler - region_check 2, \patch_handler - translate_region_ewram_core 0x7FFE -.endm - -.macro translate_region_ewram_store_align32 patch_handler - region_check 2, \patch_handler - translate_region_ewram_core 0x7FFC -.endm - - -.macro translate_region_vram_core - addiu $2, $2, -3 # see if it's 3 - ext $4, $4, 0, 17 # generate 17bit offset - bne $2, $0, 1f - lui $1, %hi(vram) # start loading vram address (delay) - - addiu $4, $4, -0x8000 # move address into VRAM region - -1: - addu $2, $1, $4 # $2 = (hi)vram + address -.endm - -.macro translate_region_vram patch_handler - region_check 6, \patch_handler - ext $2, $4, 15, 2 # $2 = bits 15 and 16 of address (delay) - translate_region_vram_core -.endm - -.macro translate_region_vram_load_align align_bits, alignment, patch_handler - region_check_align 6, \align_bits, \alignment, \patch_handler - ext $2, $4, 15, 2 # $2 = bits 15 and 16 of address (delay) - translate_region_vram_core -.endm - -.macro translate_region_vram_load_align16 align_bits, alignment, patch_handler - region_check_align 6, \align_bits, \alignment, \patch_handler - ext $2, $4, 15, 2 # $2 = bits 15 and 16 of address (delay) - ins $4, $0, 0, 1 # mask out lower bit of address - translate_region_vram_core -.endm - -.macro translate_region_vram_load_align32 align_bits, alignment, patch_handler - region_check_align 6, \align_bits, \alignment, \patch_handler - ext $2, $4, 15, 2 # $2 = bits 15 and 16 of address (delay) - ins $4, $0, 0, 2 # mask out lower two bits of address - translate_region_vram_core -.endm - -.macro translate_region_vram_store_align16 patch_handler - region_check 6, \patch_handler - ext $2, $4, 15, 2 # $2 = bits 15 and 16 of address (delay) - ins $4, $0, 0, 1 # mask out lower bit of address - translate_region_vram_core -.endm - -.macro translate_region_vram_store_align32 patch_handler - region_check 6, \patch_handler - ext $2, $4, 15, 2 # $2 = bits 15 and 16 of address (delay) - ins $4, $0, 0, 2 # mask out lower two bits of address - translate_region_vram_core -.endm - - - -.macro translate_region_gamepak_core mask - srl $2, $4, 15 # $2 = page number of address (delay) - sll $2, $2, 2 # adjust to word index - addu $2, $2, $16 # $2 = memory_map_read[address >> 15] - lw $2, -32768($2) - bne $2, $0, 1f # if it's non-NULL continue - andi $1, $4, \mask # $1 = low 15bits of address (delay slot) - - sw $ra, REG_SAVE2($16) # save return address - - save_registers # save the registers - ext $4, $4, 15, 10 # $4 = (address >> 15) & 0x3FF - - jal load_gamepak_page # get page in $2 - sw $1, REG_SAVE($16) # save offset (delay) - lw $1, REG_SAVE($16) # restore offset (delay) - - restore_registers # restore the other registers - - lw $ra, REG_SAVE2($16) # restore return address - -1: - addu $2, $2, $1 # add the memory map offset -.endm - -.macro translate_region_gamepak region, patch_handler - region_check \region, \patch_handler - translate_region_gamepak_core 0x7FFF -.endm - -.macro translate_region_gamepak_align region, a_b, alignment, patch_handler - region_check_align \region, \a_b, \alignment, \patch_handler - translate_region_gamepak_core 0x7FFF -.endm - -.macro translate_region_gamepak_align16 region, a_b, alignment, patch_handler - region_check_align \region, \a_b, \alignment, \patch_handler - translate_region_gamepak_core 0x7FFE -.endm - -.macro translate_region_gamepak_align32 region, a_b, alignment, patch_handler - region_check_align \region, \a_b, \alignment, \patch_handler - translate_region_gamepak_core 0x7FFC -.endm - - -.macro translate_region_gamepak_a region, patch_handler - region_check \region, \patch_handler - srl $2, $4, 15 # $2 = page number of address (delay) - sll $2, $2, 2 # adjust to word index - addu $2, $2, $16 # $2 = memory_map_read[address >> 15] - lw $2, -32768($2) - bne $2, $0, 1f # if it's non-NULL continue - andi $1, $4, 0x7FFF # $1 = low 15bits of address (delay slot) - - sw $ra, REG_SAVE2($16) # save return address - sw $6, REG_SAVE3($16) # save a2 - - save_registers # save the registers - ext $4, $4, 15, 10 # $4 = (address >> 15) & 0x3FF - - jal load_gamepak_page # get page in $2 - sw $1, REG_SAVE($16) # save offset (delay) - lw $1, REG_SAVE($16) # restore offset (delay) - - restore_registers # restore the other registers - - lw $ra, REG_SAVE2($16) # restore return address - lw $6, REG_SAVE3($16) # restore a2 - -1: - addu $2, $2, $1 # add the memory map offset -.endm - - -.macro eeprom_load_a patch_handler - region_check 0xD, \patch_handler - - sw $ra, REG_SAVE($16) # save the return address (delay) - sw $6, REG_SAVE2($16) # save a2 - - save_registers # save the registers - - jal read_eeprom # get eeprom value in $2 - nop - - restore_registers # restore the other registers - - lw $ra, REG_SAVE($16) # restore return address - jr $ra # return - lw $6, REG_SAVE2($16) # restore a2 -.endm - - -.macro eeprom_load_core - sw $ra, REG_SAVE($16) # save the return address (delay) - - save_registers # save the registers - - jal read_eeprom # get eeprom value in $2 - nop - - restore_registers # restore the other registers - - lw $ra, REG_SAVE($16) # restore return address - jr $ra # return - nop -.endm - -.macro eeprom_load patch_handler - region_check 0xD, \patch_handler - eeprom_load_core -.endm - -.macro eeprom_load_align align_bits, alignment, patch_handler - region_check_align 0xD, \align_bits, \alignment, \patch_handler - eeprom_load_core -.endm - -.macro eeprom_load_align16 align_bits, alignment, patch_handler - eeprom_load_align \align_bits, \alignment, \patch_handler -.endm - -.macro eeprom_load_align32 align_bits, alignment, patch_handler - eeprom_load_align \align_bits, \alignment, \patch_handler -.endm - - -.macro backup_load_core - save_registers # save the registers - - jal read_backup # get backup value in $2 - ext $4, $4, 0, 16 # address &= 0xFFFF - - restore_registers # restore the other registers - - lw $ra, REG_SAVE($16) # restore return address - jr $ra # return -.endm - -.macro backup_load_a patch_handler - region_check 0xE, \patch_handler - sw $ra, REG_SAVE($16) # save return address (delay) - sw $6, REG_SAVE2($16) # save a2 - - save_registers # save the registers - - jal read_backup # get backup value in $2 - ext $4, $4, 0, 16 # address &= 0xFFFF - - restore_registers # restore the other registers - - lw $ra, REG_SAVE($16) # restore return address - jr $ra # return - lw $6, REG_SAVE2($16) # restore a2 -.endm - - -.macro backup_load patch_handler - region_check 0xE, \patch_handler - sw $ra, REG_SAVE($16) # save the return address (delay) - backup_load_core -.endm - -.macro backup_load_align align_bits, alignment, patch_handler - region_check_align 0xE, \align_bits, \alignment, \patch_handler - sw $ra, REG_SAVE($16) # save the return address (delay) - backup_load_core -.endm - -.macro backup_load_align16 align_bits, alignment, patch_handler - region_check_align 0xE, \align_bits, \alignment, \patch_handler - sw $ra, REG_SAVE($16) # save the return address (delay) - ins $4, $0, 0, 1 # mask out lower bit - backup_load_core -.endm - -.macro backup_load_align32 align_bits, alignment, patch_handler - region_check_align 0xE, \align_bits, \alignment, \patch_handler - sw $ra, REG_SAVE($16) # save the return address (delay) - ins $4, $0, 0, 2 # mask out lower two bits - backup_load_core -.endm - - -.macro open_load8_core - lw $2, REG_CPSR($16) # $2 = CPSR (delay) - andi $2, $2, 0x20 # test T bit - beq $2, $0, 1f # branch if ARM mode - andi $4, $4, 0x03 # isolate lower 3bits from address (delay) - - andi $4, $4, 0x01 # in Thumb mode, isolate one more bit - -1: - sw $ra, REG_SAVE($16) # save the return address (delay) - save_registers # save the registers - - jal read_memory8 # get instruction at PC - addu $4, $5, $4 # a0 = PC + low bits of address - - restore_registers # restore the other registers - - lw $ra, REG_SAVE($16) # restore return address - jr $ra # return -.endm - -.macro open_load8 patch_handler - region_check_open \patch_handler - open_load8_core -.endm - - - -.macro open_load16_core - lw $2, REG_CPSR($16) # $2 = CPSR (delay) - andi $2, $2, 0x20 # test T bit - beq $2, $0, 1f # branch if ARM mode - andi $4, $4, 0x02 # isolate bit 1 from address (delay) - - addu $4, $0, $0 # zero out address bit - -1: - sw $ra, REG_SAVE($16) # save the return address (delay) - save_registers # save the registers - - jal read_memory16 # get instruction at PC - addu $4, $5, $4 # a0 = PC + low bits of address - - restore_registers # restore the other registers - - lw $ra, REG_SAVE($16) # restore return address - jr $ra # return -.endm - -.macro open_load16_align align_bits, alignment, patch_handler - region_check_open_align \align_bits, \alignment, \patch_handler - open_load16_core -.endm - -.macro open_load16_align16 align_bits, alignment, patch_handler - open_load16_align \align_bits, \alignment, \patch_handler -.endm - - - -.macro open_load32_core - lw $2, REG_CPSR($16) # $2 = CPSR (delay) - andi $2, $2, 0x20 # test T bit - - save_registers # save the registers - - beq $2, $0, 1f # branch if ARM mode - sw $ra, REG_SAVE($16) # save the return address (delay) - - jal read_memory16 # get instruction at PC - addu $4, $5, $0 # a0 = PC - - j 2f - ins $2, $2, 16, 16 # result = (result << 16) | result (delay) - -1: - jal read_memory32 # get instruction at PC - addu $4, $5, $4 # a0 = PC - -2: # join point - restore_registers # restore the other registers - - lw $ra, REG_SAVE($16) # restore return address - jr $ra # return -.endm - -.macro open_load32_a patch_handler - region_check_open \patch_handler - - lw $2, REG_CPSR($16) # $2 = CPSR (delay) - andi $2, $2, 0x20 # test T bit - - save_registers # save the registers - sw $6, REG_SAVE2($16) # save a2 - - beq $2, $0, 1f # branch if ARM mode - sw $ra, REG_SAVE($16) # save the return address (delay) - - jal read_memory16 # get instruction at PC - addu $4, $5, $0 # a0 = PC - - j 2f - ins $2, $2, 16, 16 # result = (result << 16) | result (delay) - -1: - jal read_memory32 # get instruction at PC - addu $4, $5, $4 # a0 = PC - -2: - restore_registers # restore the other registers - - lw $ra, REG_SAVE($16) # restore return address - jr $ra # return - lw $6, REG_SAVE2($16) # restore a2 (delay) -.endm - -.macro open_load32_align align_bits, alignment, patch_handler - region_check_open_align \align_bits, \alignment, \patch_handler - open_load32_core -.endm - -.macro open_load32_align32 align_bits, alignment, patch_handler - open_load32_align \align_bits, \alignment, \patch_handler -.endm - - -.macro store_function function, region, patch_handler, mask - region_check \region, \patch_handler - sw $ra, REG_SAVE($16) # save the return address (delay) - - save_registers # save the registers - - jal \function # store value out - andi $4, $4, \mask # mask address - - restore_registers # restore the other registers - - lw $ra, REG_SAVE($16) # restore return address - jr $ra # return - nop -.endm - - -.macro store_function_a function, region, patch_handler, mask - region_check \region, \patch_handler - sw $ra, REG_SAVE($16) # save the return address (delay) - - save_registers # save the registers - - jal \function # store value out - andi $4, $4, \mask # mask address - - restore_registers # restore the other registers - - lw $ra, REG_SAVE($16) # restore return address - jr $ra # return - nop -.endm - - - -.macro load_u8 base - jr $ra # return - lbu $2, %lo(\base)($2) # return base[offset] -.endm - -.macro load_s8 base - jr $ra # return - lb $2, %lo(\base)($2) # return base[offset] -.endm - -.macro load_u16 base - jr $ra # return - lhu $2, %lo(\base)($2) # return base[offset] -.endm - -.macro load_s16 base - jr $ra # return - lh $2, %lo(\base)($2) # return base[offset] -.endm - -.macro load_u32 base - jr $ra # return - lw $2, %lo(\base)($2) # return base[offset] -.endm - - -# 16bit unaligned load will always have a 1 in the LSB; -# should have already been taken care of in indexing. - -.macro load_u16_unaligned base - lhu $2, %lo(\base)($2) # load base[offset] - jr $ra # return - ror $2, $2, 8 # rotate value by 8bits -.endm - -# This is technically the same as load_s8, but kept to -# avoid confusion. - -.macro load_s16_unaligned base - jr $ra # return - lb $2, %lo(\base)($2) # return base[offset] -.endm - -# Unalignment must be known statically (use the tables to -# patch correctly) - -.macro load_u32_unaligned base, alignment - lw $2, %lo(\base)($2) # load base[offset] - jr $ra # return - ror $2, $2, (\alignment * 8) # rotate value by 8bits -.endm - - -.macro store_u8 base - jr $ra # return - sb $5, %lo(\base)($2) # store value at base[offset] -.endm - -.macro store_u16 base - jr $ra # return - sh $5, %lo(\base)($2) # store value at base[offset] -.endm - -.macro store_u32 base - jr $ra # return - sw $5, %lo(\base)($2) # store value at base[offset] -.endm - - -# Store the value double mirrored (u16) - -.macro store_u8_double base - ins $5, $5, 8, 8 # value = (value << 8) | value - jr $ra # return - sh $5, %lo(\base)($2) # store value at base[offset] -.endm - - -# Store the values and check if it overwrote code there - -.macro store_u8_smc base - addiu $2, $2, %lo(\base) # offset the address - lb $1, -32768($2) # load the SMC status - bne $1, $0, smc_write # is there code there? - sb $5, ($2) # store value at base[offset] (delay) - jr $ra # return - nop -.endm - -.macro store_u16_smc base - addiu $2, $2, %lo(\base) # offset the address - lh $1, -32768($2) # load the SMC status - bne $1, $0, smc_write # is there code there? - sh $5, ($2) # store value at base[offset] (delay) - jr $ra # return - nop -.endm - -.macro store_u32_smc base - addiu $2, $2, %lo(\base) # offset the address - lw $1, -32768($2) # load the SMC status - bne $1, $0, smc_write # is there code there? - sw $5, ($2) # store value at base[offset] (delay) - jr $ra # return - nop -.endm - - - -# Unsigned 8bit load handlers - -execute_load_bios_u8: - region_check 0, patch_load_u8 - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f # if not, perform open read - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFF # generate offset - addu $2, $2, $4 - load_u8 bios_rom - -1: - lui $2, %hi(bios_read_protect) # generate upper address - ins $2, $4, 0, 2 # lower 2 bits address contributes - load_u8 bios_read_protect - -2: - open_load8_core - nop - - -execute_load_ewram_u8: - translate_region_ewram patch_load_u8 - load_u8 (ewram + 0x8000) - -# Put the generic address over the handler you want to be default -# IWRAM is typically the most frequently read and written to. - -execute_load_u8: -execute_load_iwram_u8: - translate_region 3, patch_load_u8, (iwram + 0x8000), 0x7FFF - load_u8 (iwram + 0x8000) - -execute_load_io_u8: - translate_region 4, patch_load_u8, io_registers, 0x3FF - load_u8 io_registers - -execute_load_palette_u8: - translate_region 5, patch_load_u8, palette_ram, 0x3FF - load_u8 palette_ram - -execute_load_vram_u8: - translate_region_vram patch_load_u8 - load_u8 vram - -execute_load_oam_u8: - translate_region 7, patch_load_u8, oam_ram, 0x3FF - load_u8 oam_ram - -execute_load_gamepak8_u8: - translate_region_gamepak 8, patch_load_u8 - load_u8 0 - -execute_load_gamepak9_u8: - translate_region_gamepak 9, patch_load_u8 - load_u8 0 - -execute_load_gamepakA_u8: - translate_region_gamepak 10, patch_load_u8 - load_u8 0 - -execute_load_gamepakB_u8: - translate_region_gamepak 11, patch_load_u8 - load_u8 0 - -execute_load_gamepakC_u8: - translate_region_gamepak 12, patch_load_u8 - load_u8 0 - -execute_load_eeprom_u8: - eeprom_load patch_load_u8 - -execute_load_backup_u8: - backup_load patch_load_u8 - nop - -execute_load_open_u8: - open_load8 patch_load_u8 - nop - -load_u8_ftable: - .long execute_load_bios_u8 # 0x00 BIOS - .long execute_load_open_u8 # 0x01 open address - .long execute_load_ewram_u8 # 0x02 EWRAM - .long execute_load_iwram_u8 # 0x03 IWRAM - .long execute_load_io_u8 # 0x04 I/O registers - .long execute_load_palette_u8 # 0x05 Palette RAM - .long execute_load_vram_u8 # 0x06 VRAM - .long execute_load_oam_u8 # 0x07 OAM RAM - .long execute_load_gamepak8_u8 # 0x08 gamepak - .long execute_load_gamepak9_u8 # 0x09 gamepak - .long execute_load_gamepakA_u8 # 0x0A gamepak - .long execute_load_gamepakB_u8 # 0x0B gamepak - .long execute_load_gamepakC_u8 # 0x0C gamepak - .long execute_load_eeprom_u8 # 0x0D gamepak/eeprom - .long execute_load_backup_u8 # 0x0E Flash ROM/SRAM - .long execute_load_open_u8 # 0x0F open address - -patch_load_u8: - patch_handler load_u8_ftable, 0x01 - - - -# Signed 8bit load handlers - -execute_load_bios_s8: - region_check 0, patch_load_s8 - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFF # generate offset - addu $2, $2, $4 - load_s8 bios_rom - -1: - lui $2, %hi(bios_read_protect) # generate upper address - ins $2, $4, 0, 2 # lower 2 bits contribute - load_s8 bios_read_protect - -2: - open_load8_core - seb $2, $2 - - -execute_load_ewram_s8: - translate_region_ewram patch_load_s8 - load_s8 (ewram + 0x8000) - -execute_load_s8: -execute_load_iwram_s8: - translate_region 3, patch_load_s8, (iwram + 0x8000), 0x7FFF - load_s8 (iwram + 0x8000) - -execute_load_io_s8: - translate_region 4, patch_load_s8, io_registers, 0x3FF - load_s8 io_registers - -execute_load_palette_s8: - translate_region 5, patch_load_s8, palette_ram, 0x3FF - load_s8 palette_ram - -execute_load_vram_s8: - translate_region_vram patch_load_s8 - load_s8 vram - -execute_load_oam_s8: - translate_region 7, patch_load_s8, oam_ram, 0x3FF - load_s8 oam_ram - -execute_load_gamepak8_s8: - translate_region_gamepak 8, patch_load_s8 - load_s8 0 - -execute_load_gamepak9_s8: - translate_region_gamepak 9, patch_load_s8 - load_s8 0 - -execute_load_gamepakA_s8: - translate_region_gamepak 10, patch_load_s8 - load_s8 0 - -execute_load_gamepakB_s8: - translate_region_gamepak 11, patch_load_s8 - load_s8 0 - -execute_load_gamepakC_s8: - translate_region_gamepak 12, patch_load_s8 - load_s8 0 - -execute_load_eeprom_s8: - eeprom_load patch_load_s8 - -execute_load_backup_s8: - backup_load patch_load_s8 - seb $2, $2 # sign extend result (delay) - -execute_load_open_s8: - open_load8 patch_load_s8 - seb $2, $2 # sign extend result (delay) - -load_s8_ftable: - .long execute_load_bios_s8 # 0x00 BIOS - .long execute_load_open_s8 # 0x01 open address - .long execute_load_ewram_s8 # 0x02 EWRAM - .long execute_load_iwram_s8 # 0x03 IWRAM - .long execute_load_io_s8 # 0x04 I/O registers - .long execute_load_palette_s8 # 0x05 Palette RAM - .long execute_load_vram_s8 # 0x06 VRAM - .long execute_load_oam_s8 # 0x07 OAM RAM - .long execute_load_gamepak8_s8 # 0x08 gamepak - .long execute_load_gamepak9_s8 # 0x09 gamepak - .long execute_load_gamepakA_s8 # 0x0A gamepak - .long execute_load_gamepakB_s8 # 0x0B gamepak - .long execute_load_gamepakC_s8 # 0x0C gamepak - .long execute_load_eeprom_s8 # 0x0D gamepak/eeprom - .long execute_load_backup_s8 # 0x0E Flash ROM/SRAM - .long execute_load_open_s8 # 0x0F open address - -patch_load_s8: - patch_handler load_s8_ftable, 1 - - - -# Unsigned aligned 16bit load handlers - -execute_load_bios_u16: - region_check_align 0, 1, 0, patch_load_u16 - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f # if not, perform open read - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFF # generate offset - addu $2, $2, $4 - load_u16 bios_rom - -1: - lui $2, %hi(bios_read_protect) # generate upper address - ins $2, $4, 0, 2 # bit 1 contributes - load_u16 bios_read_protect - -2: - open_load16_core - nop - -execute_load_ewram_u16: - translate_region_ewram_load_align 1, 0, patch_load_u16 - load_u16 (ewram + 0x8000) - -execute_load_u16: -execute_load_iwram_u16: - translate_region_align 3, 1, 0, patch_load_u16, (iwram + 0x8000), 0x7FFF - load_u16 (iwram + 0x8000) - -execute_load_io_u16: - translate_region_align 4, 1, 0, patch_load_u16, io_registers, 0x3FF - load_u16 io_registers - -execute_load_palette_u16: - translate_region_align 5, 1, 0, patch_load_u16, palette_ram, 0x3FF - load_u16 palette_ram - -execute_load_vram_u16: - translate_region_vram_load_align 1, 0, patch_load_u16 - load_u16 vram - -execute_load_oam_u16: - translate_region_align 7, 1, 0, patch_load_u16, oam_ram, 0x3FF - load_u16 oam_ram - -execute_load_gamepak8_u16: - translate_region_gamepak_align 8, 1, 0, patch_load_u16 - load_u16 0 - -execute_load_gamepak9_u16: - translate_region_gamepak_align 9, 1, 0, patch_load_u16 - load_u16 0 - -execute_load_gamepakA_u16: - translate_region_gamepak_align 10, 1, 0, patch_load_u16 - load_u16 0 - -execute_load_gamepakB_u16: - translate_region_gamepak_align 11, 1, 0, patch_load_u16 - load_u16 0 - -execute_load_gamepakC_u16: - translate_region_gamepak_align 12, 1, 0, patch_load_u16 - load_u16 0 - -execute_load_eeprom_u16: - eeprom_load_align 1, 0, patch_load_u16 - -execute_load_backup_u16: - backup_load_align 1, 0, patch_load_u16 - nop - -execute_load_open_u16: - open_load16_align 1, 0, patch_load_u16 - nop - - -# Unsigned unaligned 16bit load handlers - -execute_load_bios_u16u: - region_check_align 0, 1, 1, patch_load_u16 - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f # if not, perform open read - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFE # generate offset - addu $2, $2, $4 - load_u16_unaligned bios_rom - -1: - lui $2, %hi(bios_read_protect) # generate upper address - ext $1, $4, 1, 1 - ins $2, $1, 1, 1 # bit 1 contributes - load_u16_unaligned bios_read_protect - -2: - open_load16_core - ror $2, $2, 8 - - -execute_load_ewram_u16u: - translate_region_ewram_load_align16 1, 1, patch_load_u16 - load_u16_unaligned (ewram + 0x8000) - -execute_load_iwram_u16u: - translate_region_align 3, 1, 1, patch_load_u16, (iwram + 0x8000), 0x7FFE - load_u16_unaligned (iwram + 0x8000) - -execute_load_io_u16u: - translate_region_align 4, 1, 1, patch_load_u16, io_registers, 0x3FE - load_u16_unaligned io_registers - -execute_load_palette_u16u: - translate_region_align 5, 1, 1, patch_load_u16, palette_ram, 0x3FE - load_u16_unaligned palette_ram - -execute_load_vram_u16u: - translate_region_vram_load_align16 1, 1, patch_load_u16 - load_u16_unaligned vram - -execute_load_oam_u16u: - translate_region_align 7, 1, 1, patch_load_u16, oam_ram, 0x3FE - load_u16_unaligned oam_ram - -execute_load_gamepak8_u16u: - translate_region_gamepak_align16 8, 1, 1, patch_load_u16 - load_u16_unaligned 0 - -execute_load_gamepak9_u16u: - translate_region_gamepak_align16 9, 1, 1, patch_load_u16 - load_u16_unaligned 0 - -execute_load_gamepakA_u16u: - translate_region_gamepak_align16 10, 1, 1, patch_load_u16 - load_u16_unaligned 0 - -execute_load_gamepakB_u16u: - translate_region_gamepak_align16 11, 1, 1, patch_load_u16 - load_u16_unaligned 0 - -execute_load_gamepakC_u16u: - translate_region_gamepak_align16 12, 1, 1, patch_load_u16 - load_u16_unaligned 0 - -execute_load_eeprom_u16u: - eeprom_load_align16 1, 1, patch_load_u16 - -execute_load_backup_u16u: - backup_load_align16 1, 1, patch_load_u16 - ror $2, $2, 8 # rotate value by 8bits - -execute_load_open_u16u: - open_load16_align16 1, 1, patch_load_u16 - ror $2, $2, 8 # rotate value by 8bits - -load_u16_ftable: - .long execute_load_bios_u16 # 0x00 BIOS - .long execute_load_open_u16 # 0x01 open address - .long execute_load_ewram_u16 # 0x02 EWRAM - .long execute_load_iwram_u16 # 0x03 IWRAM - .long execute_load_io_u16 # 0x04 I/O registers - .long execute_load_palette_u16 # 0x05 Palette RAM - .long execute_load_vram_u16 # 0x06 VRAM - .long execute_load_oam_u16 # 0x07 OAM RAM - .long execute_load_gamepak8_u16 # 0x08 gamepak - .long execute_load_gamepak9_u16 # 0x09 gamepak - .long execute_load_gamepakA_u16 # 0x0A gamepak - .long execute_load_gamepakB_u16 # 0x0B gamepak - .long execute_load_gamepakC_u16 # 0x0C gamepak - .long execute_load_eeprom_u16 # 0x0D gamepak/eeprom - .long execute_load_backup_u16 # 0x0E Flash ROM/SRAM - .long execute_load_open_u16 # 0x0F open - - .long execute_load_bios_u16u # 0x00 BIOS unaligned - .long execute_load_open_u16u # 0x01 open address unaligned - .long execute_load_ewram_u16u # 0x02 EWRAM unaligned - .long execute_load_iwram_u16u # 0x03 IWRAM unaligned - .long execute_load_io_u16u # 0x04 I/O registers unaligned - .long execute_load_palette_u16u # 0x05 Palette RAM unaligned - .long execute_load_vram_u16u # 0x06 VRAM unaligned - .long execute_load_oam_u16u # 0x07 OAM RAM unaligned - .long execute_load_gamepak8_u16u# 0x08 gamepak unaligned - .long execute_load_gamepak9_u16u# 0x09 gamepak unaligned - .long execute_load_gamepakA_u16u# 0x0A gamepak unaligned - .long execute_load_gamepakB_u16u# 0x0B gamepak unaligned - .long execute_load_gamepakC_u16u# 0x0C gamepak unaligned - .long execute_load_eeprom_u16u # 0x0D gamepak/eeprom unaligned - .long execute_load_backup_u16u # 0x0E Flash ROM/SRAM unaligned - .long execute_load_open_u16u # 0x0F open unaligned - -patch_load_u16: - patch_handler_align load_u16_ftable, 1 - -# Signed aligned 16bit load handlers - -execute_load_bios_s16: - region_check_align 0, 1, 0, patch_load_s16 - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f # if not, perform open read - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFF # generate offset - addu $2, $2, $4 - load_s16 bios_rom - -1: - lui $2, %hi(bios_read_protect) # generate upper address - ins $2, $4, 0, 2 # bit 1 contributes - load_s16 bios_read_protect - -2: - open_load16_core - seh $2, $2 - - -execute_load_ewram_s16: - translate_region_ewram_load_align 1, 0, patch_load_s16 - load_s16 (ewram + 0x8000) - -execute_load_s16: -execute_load_iwram_s16: - translate_region_align 3, 1, 0, patch_load_s16, (iwram + 0x8000), 0x7FFF - load_s16 (iwram + 0x8000) - -execute_load_io_s16: - translate_region_align 4, 1, 0, patch_load_s16, io_registers, 0x3FF - load_s16 io_registers - -execute_load_palette_s16: - translate_region_align 5, 1, 0, patch_load_s16, palette_ram, 0x3FF - load_s16 palette_ram - -execute_load_vram_s16: - translate_region_vram_load_align 1, 0, patch_load_s16 - load_s16 vram - -execute_load_oam_s16: - translate_region_align 7, 1, 0, patch_load_s16, oam_ram, 0x3FF - load_s16 oam_ram - -execute_load_gamepak8_s16: - translate_region_gamepak_align 8, 1, 0, patch_load_s16 - load_s16 0 - -execute_load_gamepak9_s16: - translate_region_gamepak_align 9, 1, 0, patch_load_s16 - load_s16 0 - -execute_load_gamepakA_s16: - translate_region_gamepak_align 10, 1, 0, patch_load_s16 - load_s16 0 - -execute_load_gamepakB_s16: - translate_region_gamepak_align 11, 1, 0, patch_load_s16 - load_s16 0 - -execute_load_gamepakC_s16: - translate_region_gamepak_align 12, 1, 0, patch_load_s16 - load_s16 0 - -execute_load_eeprom_s16: - eeprom_load_align 1, 0, patch_load_s16 - -execute_load_backup_s16: - backup_load_align 1, 0, patch_load_s16 - nop - -execute_load_open_s16: - open_load16_align 1, 0, patch_load_s16 - nop - - -# Signed unaligned 16bit load handlers - -execute_load_bios_s16u: - region_check_align 0, 1, 1, patch_load_s16 - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f # if not, perform open read - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFE # generate offset - addu $2, $1, $4 - load_s16_unaligned bios_rom - -1: - lui $2, %hi(bios_read_protect) # generate upper address - ext $1, $4, 1, 1 - ins $2, $1, 1, 1 # bit 1 contributes - load_s16_unaligned bios_read_protect - -2: - open_load16_core - seb $2, $2 - -execute_load_ewram_s16u: - translate_region_ewram_load_align16 1, 1, patch_load_s16 - load_s16_unaligned (ewram + 0x8000) - -execute_load_iwram_s16u: - translate_region_align 3, 1, 1, patch_load_s16, (iwram + 0x8000), 0x7FFE - load_s16_unaligned (iwram + 0x8000) - -execute_load_io_s16u: - translate_region_align 4, 1, 1, patch_load_s16, io_registers, 0x3FE - load_s16_unaligned io_registers - -execute_load_palette_s16u: - translate_region_align 5, 1, 1, patch_load_s16, palette_ram, 0x3FE - load_s16_unaligned palette_ram - -execute_load_vram_s16u: - translate_region_vram_load_align16 1, 1, patch_load_s16 - load_s16_unaligned vram - -execute_load_oam_s16u: - translate_region_align 7, 1, 1, patch_load_s16, oam_ram, 0x3FE - load_s16_unaligned oam_ram - -execute_load_gamepak8_s16u: - translate_region_gamepak_align16 8, 1, 1, patch_load_s16 - load_s16_unaligned 0 - -execute_load_gamepak9_s16u: - translate_region_gamepak_align16 9, 1, 1, patch_load_s16 - load_s16_unaligned 0 - -execute_load_gamepakA_s16u: - translate_region_gamepak_align16 10, 1, 1, patch_load_s16 - load_s16_unaligned 0 - -execute_load_gamepakB_s16u: - translate_region_gamepak_align16 11, 1, 1, patch_load_s16 - load_s16_unaligned 0 - -execute_load_gamepakC_s16u: - translate_region_gamepak_align16 12, 1, 1, patch_load_s16 - load_s16_unaligned 0 - -execute_load_eeprom_s16u: - eeprom_load_align 1, 1, patch_load_s16 - -execute_load_backup_s16u: - backup_load_align 1, 1, patch_load_s16 - seb $2, $2 # sign extend result from 8bits - -execute_load_open_s16u: - open_load16_align 1, 1, patch_load_s16 - seb $2, $2 # sign extend result from 8bits - -load_s16_ftable: - .long execute_load_bios_s16 # 0x00 BIOS - .long execute_load_open_s16 # 0x01 open address - .long execute_load_ewram_s16 # 0x02 EWRAM - .long execute_load_iwram_s16 # 0x03 IWRAM - .long execute_load_io_s16 # 0x04 I/O registers - .long execute_load_palette_s16 # 0x05 Palette RAM - .long execute_load_vram_s16 # 0x06 VRAM - .long execute_load_oam_s16 # 0x07 OAM RAM - .long execute_load_gamepak8_s16 # 0x08 gamepak - .long execute_load_gamepak9_s16 # 0x09 gamepak - .long execute_load_gamepakA_s16 # 0x0A gamepak - .long execute_load_gamepakB_s16 # 0x0B gamepak - .long execute_load_gamepakC_s16 # 0x0C gamepak - .long execute_load_eeprom_s16 # 0x0D gamepak/eeprom - .long execute_load_backup_s16 # 0x0E Flash ROM/SRAM - .long execute_load_open_s16 # 0x0F open unaligned - - .long execute_load_bios_s16u # 0x00 BIOS unaligned - .long execute_load_open_s16u # 0x01 open address unaligned - .long execute_load_ewram_s16u # 0x02 EWRAM unaligned - .long execute_load_iwram_s16u # 0x03 IWRAM unaligned - .long execute_load_io_s16u # 0x04 I/O registers unaligned - .long execute_load_palette_s16u # 0x05 Palette RAM unaligned - .long execute_load_vram_s16u # 0x06 VRAM unaligned - .long execute_load_oam_s16u # 0x07 OAM RAM unaligned - .long execute_load_gamepak8_s16u# 0x08 gamepak unaligned - .long execute_load_gamepak9_s16u# 0x09 gamepak unaligned - .long execute_load_gamepakA_s16u# 0x0A gamepak unaligned - .long execute_load_gamepakB_s16u# 0x0B gamepak unaligned - .long execute_load_gamepakC_s16u# 0x0C gamepak unaligned - .long execute_load_eeprom_s16u # 0x0D gamepak/eeprom unaligned - .long execute_load_backup_s16u # 0x0E Flash ROM/SRAM unaligned - .long execute_load_open_s16u # 0x0F open unaligned - -patch_load_s16: - patch_handler_align load_s16_ftable, 1 - - - -# Unsigned aligned 32bit load handlers - -execute_load_bios_u32: - region_check_align 0, 2, 0, patch_load_u32 - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f # if not, perform open read - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFF # generate offset - addu $2, $2, $4 - load_u32 bios_rom - -1: - lui $2, %hi(bios_read_protect) # generate upper address - load_u32 bios_read_protect - -2: - open_load32_core - nop - - -execute_load_ewram_u32: - translate_region_ewram_load_align 2, 0, patch_load_u32 - load_u32 (ewram + 0x8000) - -execute_load_u32: -execute_load_iwram_u32: - translate_region_align 3, 2, 0, patch_load_u32, (iwram + 0x8000), 0x7FFF - load_u32 (iwram + 0x8000) - -execute_load_io_u32: - translate_region_align 4, 2, 0, patch_load_u32, io_registers, 0x3FF - load_u32 io_registers - -execute_load_palette_u32: - translate_region_align 5, 2, 0, patch_load_u32, palette_ram, 0x3FF - load_u32 palette_ram - -execute_load_vram_u32: - translate_region_vram_load_align 2, 0, patch_load_u32 - load_u32 vram - -execute_load_oam_u32: - translate_region_align 7, 2, 0, patch_load_u32, oam_ram, 0x3FF - load_u32 oam_ram - -execute_load_gamepak8_u32: - translate_region_gamepak_align 8, 2, 0, patch_load_u32 - load_u32 0 - -execute_load_gamepak9_u32: - translate_region_gamepak_align 9, 2, 0, patch_load_u32 - load_u32 0 - -execute_load_gamepakA_u32: - translate_region_gamepak_align 10, 2, 0, patch_load_u32 - load_u32 0 - -execute_load_gamepakB_u32: - translate_region_gamepak_align 11, 2, 0, patch_load_u32 - load_u32 0 - -execute_load_gamepakC_u32: - translate_region_gamepak_align 12, 2, 0, patch_load_u32 - load_u32 0 - -execute_load_eeprom_u32: - eeprom_load_align 2, 0, patch_load_u32 - -execute_load_backup_u32: - backup_load_align 2, 0, patch_load_u32 - nop - -execute_load_open_u32: - open_load32_align 2, 0, patch_load_u32 - nop - - -# Unsigned unaligned (by 1) 32bit load handlers - -execute_load_bios_u32u1: - region_check_align 0, 2, 1, patch_load_u32 - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f # if not, perform open read - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFC # generate offset - addu $2, $2, $4 - load_u32_unaligned bios_rom, 1 - -1: - lui $2, %hi(bios_read_protect) # generate upper address - load_u32_unaligned bios_read_protect, 1 - -2: - open_load32_core - ror $2, $2, 8 - -execute_load_ewram_u32u1: - translate_region_ewram_load_align32 2, 1, patch_load_u32 - load_u32_unaligned (ewram + 0x8000), 1 - -execute_load_iwram_u32u1: - translate_region_align 3, 2, 1, patch_load_u32, (iwram + 0x8000), 0x7FFC - load_u32_unaligned (iwram + 0x8000), 1 - -execute_load_io_u32u1: - translate_region_align 4, 2, 1, patch_load_u32, io_registers, 0x3FC - load_u32_unaligned io_registers, 1 - -execute_load_palette_u32u1: - translate_region_align 5, 2, 1, patch_load_u32, palette_ram, 0x3FC - load_u32_unaligned palette_ram, 1 - -execute_load_vram_u32u1: - translate_region_vram_load_align32 2, 1, patch_load_u32 - load_u32_unaligned vram, 1 - -execute_load_oam_u32u1: - translate_region_align 7, 2, 1, patch_load_u32, oam_ram, 0x3FC - load_u32_unaligned oam_ram, 1 - -execute_load_gamepak8_u32u1: - translate_region_gamepak_align32 8, 2, 1, patch_load_u32 - load_u32_unaligned 0, 1 - -execute_load_gamepak9_u32u1: - translate_region_gamepak_align32 9, 2, 1, patch_load_u32 - load_u32_unaligned 0, 1 - -execute_load_gamepakA_u32u1: - translate_region_gamepak_align32 10, 2, 1, patch_load_u32 - load_u32_unaligned 0, 1 - -execute_load_gamepakB_u32u1: - translate_region_gamepak_align32 11, 2, 1, patch_load_u32 - load_u32_unaligned 0, 1 - -execute_load_gamepakC_u32u1: - translate_region_gamepak_align32 12, 2, 1, patch_load_u32 - load_u32_unaligned 0, 1 - -execute_load_eeprom_u32u1: - eeprom_load_align32 2, 1, patch_load_u32 - -execute_load_backup_u32u1: - backup_load_align32 2, 1, patch_load_u32 - ror $2, $2, 8 # rotate value by 8bits - -execute_load_open_u32u1: - open_load32_align32 2, 1, patch_load_u32 - ror $2, $2, 8 # rotate value by 8bits - - -# Unsigned unaligned (by 2) 32bit load handlers - -execute_load_bios_u32u2: - region_check_align 0, 2, 2, patch_load_u32 - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f # if not, perform open read - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFC # generate offset - addu $2, $2, $4 - load_u32_unaligned bios_rom, 2 - -1: - lui $2, %hi(bios_read_protect) # generate upper address - load_u32_unaligned bios_read_protect, 2 - -2: - open_load32_core - ror $2, $2, 16 - -execute_load_ewram_u32u2: - translate_region_ewram_load_align32 2, 2, patch_load_u32 - load_u32_unaligned (ewram + 0x8000), 2 - -execute_load_iwram_u32u2: - translate_region_align 3, 2, 2, patch_load_u32, (iwram + 0x8000), 0x7FFC - load_u32_unaligned (iwram + 0x8000), 2 - -execute_load_io_u32u2: - translate_region_align 4, 2, 2, patch_load_u32, io_registers, 0x3FC - load_u32_unaligned io_registers, 2 - -execute_load_palette_u32u2: - translate_region_align 5, 2, 2, patch_load_u32, palette_ram, 0x3FC - load_u32_unaligned palette_ram, 2 - -execute_load_vram_u32u2: - translate_region_vram_load_align32 2, 2, patch_load_u32 - load_u32_unaligned vram, 2 - -execute_load_oam_u32u2: - translate_region_align 7, 2, 2, patch_load_u32, oam_ram, 0x3FC - load_u32_unaligned oam_ram, 2 - -execute_load_gamepak8_u32u2: - translate_region_gamepak_align32 8, 2, 2, patch_load_u32 - load_u32_unaligned 0, 2 - -execute_load_gamepak9_u32u2: - translate_region_gamepak_align32 9, 2, 2, patch_load_u32 - load_u32_unaligned 0, 2 - -execute_load_gamepakA_u32u2: - translate_region_gamepak_align32 10, 2, 2, patch_load_u32 - load_u32_unaligned 0, 2 - -execute_load_gamepakB_u32u2: - translate_region_gamepak_align32 11, 2, 2, patch_load_u32 - load_u32_unaligned 0, 2 - -execute_load_gamepakC_u32u2: - translate_region_gamepak_align32 12, 2, 2, patch_load_u32 - load_u32_unaligned 0, 2 - -execute_load_eeprom_u32u2: - eeprom_load_align32 2, 2, patch_load_u32 - -execute_load_backup_u32u2: - backup_load_align32 2, 2, patch_load_u32 - ror $2, $2, 16 # rotate value by 16bits - -execute_load_open_u32u2: - open_load32_align32 2, 2, patch_load_u32 - ror $2, $2, 16 # rotate value by 16bits - -# Unsigned unaligned (by 1) 32bit load handlers - -execute_load_bios_u32u3: - region_check_align 0, 2, 3, patch_load_u32 - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f # if not, perform open read - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFC # generate offset - addu $2, $2, $4 - load_u32_unaligned bios_rom, 3 - -1: - lui $2, %hi(bios_read_protect) # generate upper address - load_u32_unaligned bios_read_protect, 3 - -2: - open_load32_core - ror $2, $2, 24 - -execute_load_ewram_u32u3: - translate_region_ewram_load_align32 2, 3, patch_load_u32 - load_u32_unaligned (ewram + 0x8000), 3 - -execute_load_iwram_u32u3: - translate_region_align 3, 2, 3, patch_load_u32, (iwram + 0x8000), 0x7FFC - load_u32_unaligned (iwram + 0x8000), 3 - -execute_load_io_u32u3: - translate_region_align 4, 2, 3, patch_load_u32, io_registers, 0x3FC - load_u32_unaligned io_registers, 3 - -execute_load_palette_u32u3: - translate_region_align 5, 2, 3, patch_load_u32, palette_ram, 0x3FC - load_u32_unaligned palette_ram, 3 - -execute_load_vram_u32u3: - translate_region_vram_load_align32 2, 3, patch_load_u32 - load_u32_unaligned vram, 3 - -execute_load_oam_u32u3: - translate_region_align 7, 2, 3, patch_load_u32, oam_ram, 0x3FC - load_u32_unaligned oam_ram, 3 - -execute_load_gamepak8_u32u3: - translate_region_gamepak_align32 8, 2, 3, patch_load_u32 - load_u32_unaligned 0, 3 - -execute_load_gamepak9_u32u3: - translate_region_gamepak_align32 9, 2, 3, patch_load_u32 - load_u32_unaligned 0, 3 - -execute_load_gamepakA_u32u3: - translate_region_gamepak_align32 10, 2, 3, patch_load_u32 - load_u32_unaligned 0, 3 - -execute_load_gamepakB_u32u3: - translate_region_gamepak_align32 11, 2, 3, patch_load_u32 - load_u32_unaligned 0, 3 - -execute_load_gamepakC_u32u3: - translate_region_gamepak_align32 12, 2, 3, patch_load_u32 - load_u32_unaligned 0, 3 - -execute_load_eeprom_u32u3: - eeprom_load_align32 2, 3, patch_load_u32 - -execute_load_backup_u32u3: - backup_load_align32 2, 3, patch_load_u32 - ror $2, $2, 24 # rotate value by 24bits - -execute_load_open_u32u3: - open_load32_align32 2, 3, patch_load_u32 - ror $2, $2, 24 # rotate value by 24bits - - -load_u32_ftable: - .long execute_load_bios_u32 # 0x00 BIOS - .long execute_load_open_u32 # 0x01 open address - .long execute_load_ewram_u32 # 0x02 EWRAM - .long execute_load_iwram_u32 # 0x03 IWRAM - .long execute_load_io_u32 # 0x04 I/O registers - .long execute_load_palette_u32 # 0x05 Palette RAM - .long execute_load_vram_u32 # 0x06 VRAM - .long execute_load_oam_u32 # 0x07 OAM RAM - .long execute_load_gamepak8_u32 # 0x08 gamepak - .long execute_load_gamepak9_u32 # 0x09 gamepak - .long execute_load_gamepakA_u32 # 0x0A gamepak - .long execute_load_gamepakB_u32 # 0x0B gamepak - .long execute_load_gamepakC_u32 # 0x0C gamepak - .long execute_load_eeprom_u32 # 0x0D gamepak/eeprom - .long execute_load_backup_u32 # 0x0E Flash ROM/SRAM - .long execute_load_open_u32 # 0x0F open - - .long execute_load_bios_u32u1 # 0x00 BIOS unaligned (1b) - .long execute_load_open_u32u1 # 0x01 open address unaligned (1b) - .long execute_load_ewram_u32u1 # 0x02 EWRAM unaligned (1b) - .long execute_load_iwram_u32u1 # 0x03 IWRAM unaligned (1b) - .long execute_load_io_u32u1 # 0x04 I/O registers unaligned (1b) - .long execute_load_palette_u32u1 # 0x05 Palette RAM unaligned (1b) - .long execute_load_vram_u32u1 # 0x06 VRAM unaligned (1b) - .long execute_load_oam_u32u1 # 0x07 OAM RAM unaligned (1b) - .long execute_load_gamepak8_u32u1 # 0x08 gamepak unaligned (1b) - .long execute_load_gamepak9_u32u1 # 0x09 gamepak unaligned (1b) - .long execute_load_gamepakA_u32u1 # 0x0A gamepak unaligned (1b) - .long execute_load_gamepakB_u32u1 # 0x0B gamepak unaligned (1b) - .long execute_load_gamepakC_u32u1 # 0x0C gamepak unaligned (1b) - .long execute_load_eeprom_u32u1 # 0x0D gamepak/eeprom unaligned (1b) - .long execute_load_backup_u32u1 # 0x0E Flash ROM/SRAM unaligned (1b) - .long execute_load_open_u32u1 # 0x0F open unaligned (1b) - - .long execute_load_bios_u32u2 # 0x00 BIOS unaligned (2b) - .long execute_load_open_u32u2 # 0x01 open address unaligned (2b) - .long execute_load_ewram_u32u2 # 0x02 EWRAM unaligned (2b) - .long execute_load_iwram_u32u2 # 0x03 IWRAM unaligned (2b) - .long execute_load_io_u32u2 # 0x04 I/O registers unaligned (2b) - .long execute_load_palette_u32u2 # 0x05 Palette RAM unaligned (2b) - .long execute_load_vram_u32u2 # 0x06 VRAM unaligned (2b) - .long execute_load_oam_u32u2 # 0x07 OAM RAM unaligned (2b) - .long execute_load_gamepak8_u32u2 # 0x08 gamepak unaligned (2b) - .long execute_load_gamepak9_u32u2 # 0x09 gamepak unaligned (2b) - .long execute_load_gamepakA_u32u2 # 0x0A gamepak unaligned (2b) - .long execute_load_gamepakB_u32u2 # 0x0B gamepak unaligned (2b) - .long execute_load_gamepakC_u32u2 # 0x0C gamepak unaligned (2b) - .long execute_load_eeprom_u32u2 # 0x0D gamepak/eeprom unaligned (2b) - .long execute_load_backup_u32u2 # 0x0E Flash ROM/SRAM unaligned (2b) - .long execute_load_open_u32u2 # 0x0F open unaligned (2b) - - .long execute_load_bios_u32u3 # 0x00 BIOS unaligned (3b) - .long execute_load_open_u32u3 # 0x01 open address unaligned (3b) - .long execute_load_ewram_u32u3 # 0x02 EWRAM unaligned (3b) - .long execute_load_iwram_u32u3 # 0x03 IWRAM unaligned (3b) - .long execute_load_io_u32u3 # 0x04 I/O registers unaligned (3b) - .long execute_load_palette_u32u3 # 0x05 Palette RAM unaligned (3b) - .long execute_load_vram_u32u3 # 0x06 VRAM unaligned (3b) - .long execute_load_oam_u32u3 # 0x07 OAM RAM unaligned (3b) - .long execute_load_gamepak8_u32u3 # 0x08 gamepak unaligned (3b) - .long execute_load_gamepak9_u32u3 # 0x09 gamepak unaligned (3b) - .long execute_load_gamepakA_u32u3 # 0x0A gamepak unaligned (3b) - .long execute_load_gamepakB_u32u3 # 0x0B gamepak unaligned (3b) - .long execute_load_gamepakC_u32u3 # 0x0C gamepak unaligned (3b) - .long execute_load_eeprom_u32u3 # 0x0D gamepak/eeprom unaligned (3b) - .long execute_load_backup_u32u3 # 0x0E Flash ROM/SRAM unaligned (3b) - .long execute_load_open_u32u3 # 0x0F open unaligned (3b) - -patch_load_u32: - patch_handler_align load_u32_ftable, 2 - - - -# Unsigned always aligned 32bit load handlers - -execute_load_bios_u32a: - region_check 0, patch_load_u32a - srl $2, $4, 14 # check if address is in BIOS region - bne $2, $0, 2f # if not, perform open read - srl $1, $5, 14 # check if PC is in BIOS region - bne $1, $0, 1f # if not, perform BIOS protected read - lui $2, %hi(bios_rom) # generate upper address (delay) - - andi $4, $4, 0x3FFF # generate offset - addu $2, $2, $4 - load_u32 bios_rom - -1: - lui $2, %hi(bios_read_protect) # generate upper address - load_u32 bios_read_protect - -2: - open_load32_core - nop - -execute_load_ewram_u32a: - translate_region_ewram patch_load_u32a - load_u32 (ewram + 0x8000) - -execute_aligned_load32: -execute_load_iwram_u32a: - translate_region 3, patch_load_u32a, (iwram + 0x8000), 0x7FFF - load_u32 (iwram + 0x8000) - -execute_load_io_u32a: - translate_region 4, patch_load_u32a, io_registers, 0x3FF - load_u32 io_registers - -execute_load_palette_u32a: - translate_region 5, patch_load_u32a, palette_ram, 0x3FF - load_u32 palette_ram - -execute_load_vram_u32a: - translate_region_vram patch_load_u32a - load_u32 vram - -execute_load_oam_u32a: - translate_region 7, patch_load_u32a, oam_ram, 0x3FF - load_u32 oam_ram - -execute_load_gamepak8_u32a: - translate_region_gamepak_a 8, patch_load_u32a - load_u32 0 - -execute_load_gamepak9_u32a: - translate_region_gamepak_a 9, patch_load_u32a - load_u32 0 - -execute_load_gamepakA_u32a: - translate_region_gamepak_a 10, patch_load_u32a - load_u32 0 - -execute_load_gamepakB_u32a: - translate_region_gamepak_a 11, patch_load_u32a - load_u32 0 - -execute_load_gamepakC_u32a: - translate_region_gamepak_a 12, patch_load_u32a - load_u32 0 - -execute_load_eeprom_u32a: - eeprom_load_a patch_load_u32a - -execute_load_backup_u32a: - backup_load_a patch_load_u32a - nop - -execute_load_open_u32a: - open_load32_a patch_load_u32a - -load_u32a_ftable: - .long execute_load_bios_u32a # 0x00 BIOS unaligned (3b) - .long execute_load_open_u32a # 0x01 open address unaligned (3b) - .long execute_load_ewram_u32a # 0x02 EWRAM unaligned (3b) - .long execute_load_iwram_u32a # 0x03 IWRAM unaligned (3b) - .long execute_load_io_u32a # 0x04 I/O registers unaligned (3b) - .long execute_load_palette_u32a # 0x05 Palette RAM unaligned (3b) - .long execute_load_vram_u32a # 0x06 VRAM unaligned (3b) - .long execute_load_oam_u32a # 0x07 OAM RAM unaligned (3b) - .long execute_load_gamepak8_u32a # 0x08 gamepak unaligned (3b) - .long execute_load_gamepak9_u32a # 0x09 gamepak unaligned (3b) - .long execute_load_gamepakA_u32a # 0x0A gamepak unaligned (3b) - .long execute_load_gamepakB_u32a # 0x0B gamepak unaligned (3b) - .long execute_load_gamepakC_u32a # 0x0C gamepak unaligned (3b) - .long execute_load_eeprom_u32a # 0x0D gamepak/eeprom unaligned (3b) - .long execute_load_backup_u32a # 0x0E Flash ROM/SRAM unaligned (3b) - .long execute_load_open_u32a # 0x0F open unaligned (3b) - -patch_load_u32a: - patch_handler load_u32a_ftable, 1 - - -# Unsigned 8bit store handlers - -execute_store_ignore0_u8: - ignore_region 0, patch_store_u8 - -execute_store_ignore1_u8: - ignore_region 1, patch_store_u8 - -execute_store_ewram_u8: - translate_region_ewram patch_store_u8 - store_u8_smc (ewram + 0x8000) - -execute_store_u8: -execute_store_iwram_u8: - translate_region 3, patch_store_u8, (iwram + 0x8000), 0x7FFF - store_u8_smc (iwram + 0x8000) - -execute_store_io_u8: - region_check 4, patch_store_u8 - andi $5, $5, 0xFF # make value 8bit - andi $4, $4, 0x3FF # wrap around address - sw $ra, REG_SAVE3($16) # preserve $ra - - 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 - -execute_store_palette_u8: - region_check 5, patch_store_u8 - andi $2, $4, 0x3FE # align palette address - ins $5, $5, 8, 8 # double value - addu $2, $2, $16 - sh $5, 0x100($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 - jr $ra # return - sh $1, 0x500($2) - -execute_store_vram_u8: - translate_region_vram_store_align16 patch_store_u8 - store_u8_double vram - -execute_store_oam_u8: - translate_region 7, patch_store_u8, oam_ram, 0x3FE - lui $1, %hi(oam_update) # write non-zero to oam_update - sw $1, %lo(oam_update)($1) # cheap, but this is non-zero - store_u8_double oam_ram - -execute_store_ignore8_u8: - ignore_region 8, patch_store_u8 - -execute_store_ignore9_u8: - ignore_region 9, patch_store_u8 - -execute_store_ignoreA_u8: - ignore_region 10, patch_store_u8 - -execute_store_ignoreB_u8: - ignore_region 11, patch_store_u8 - -execute_store_ignoreC_u8: - ignore_region 12, patch_store_u8 - -execute_store_eeprom_u8: - store_function write_eeprom, 13, patch_store_u8, 0x3FF - -execute_store_backup_u8: - store_function write_backup, 14, patch_store_u8, 0xFFFF - -execute_store_ignoreF_u8: - ignore_high patch_store_u8 - -store_u8_ftable: - .long execute_store_ignore0_u8 # 0x00 BIOS - .long execute_store_ignore1_u8 # 0x01 open address - .long execute_store_ewram_u8 # 0x02 EWRAM - .long execute_store_iwram_u8 # 0x03 IWRAM - .long execute_store_io_u8 # 0x04 I/O registers - .long execute_store_palette_u8 # 0x05 Palette RAM - .long execute_store_vram_u8 # 0x06 VRAM - .long execute_store_oam_u8 # 0x07 OAM RAM - .long execute_store_ignore8_u8 # 0x08 gamepak - .long execute_store_ignore9_u8 # 0x09 gamepak - .long execute_store_ignoreA_u8 # 0x0A gamepak - .long execute_store_ignoreB_u8 # 0x0B gamepak - .long execute_store_ignoreC_u8 # 0x0C gamepak - .long execute_store_eeprom_u8 # 0x0D gamepak/eeprom - .long execute_store_backup_u8 # 0x0E Flash ROM/SRAM - .long execute_store_ignoreF_u8 # 0x0F open address - -patch_store_u8: - patch_handler store_u8_ftable, 0x0F - - -# Unsigned 16bit store handlers - -execute_store_ignore0_u16: - ignore_region 0, patch_store_u16 - -execute_store_ignore1_u16: - ignore_region 1, patch_store_u16 - -execute_store_ewram_u16: - translate_region_ewram_store_align16 patch_store_u16 - store_u16_smc (ewram + 0x8000) - -execute_store_u16: -execute_store_iwram_u16: - translate_region 3, patch_store_u16, (iwram + 0x8000), 0x7FFE - store_u16_smc (iwram + 0x8000) - -execute_store_io_u16: - region_check 4, patch_store_u16 - andi $5, $5, 0xFFFF # make value 16bit - andi $4, $4, 0x3FE # wrap around/align address - sw $ra, REG_SAVE3($16) # preserve $ra - - 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 - -execute_store_palette_u16: - region_check 5, patch_store_u16 - andi $2, $4, 0x3FE # wrap/align palette address - addu $2, $2, $16 - sh $5, 0x100($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 - jr $ra # return - sh $1, 0x500($2) - -execute_store_vram_u16: - translate_region_vram_store_align16 patch_store_u16 - store_u16 vram - -execute_store_oam_u16: - translate_region 7, patch_store_u16, oam_ram, 0x3FE - lui $1, %hi(oam_update) # write non-zero to oam_update - sw $1, %lo(oam_update)($1) # cheap, but this is non-zero - store_u16 oam_ram - -execute_store_rtc_u16: - store_function write_rtc, 8, patch_store_u16, 0xFE - -execute_store_ignore9_u16: - ignore_region 9, patch_store_u16 - -execute_store_ignoreA_u16: - ignore_region 10, patch_store_u16 - -execute_store_ignoreB_u16: - ignore_region 11, patch_store_u16 - -execute_store_ignoreC_u16: - ignore_region 12, patch_store_u16 - -execute_store_eeprom_u16: - store_function write_eeprom, 13, patch_store_u16, 0x3FE - -execute_store_ignoreE_u16: - ignore_region 14, patch_store_u16 - -execute_store_ignoreF_u16: - ignore_high patch_store_u16 - -store_u16_ftable: - .long execute_store_ignore0_u16 # 0x00 BIOS - .long execute_store_ignore1_u16 # 0x01 open address - .long execute_store_ewram_u16 # 0x02 EWRAM - .long execute_store_iwram_u16 # 0x03 IWRAM - .long execute_store_io_u16 # 0x04 I/O registers - .long execute_store_palette_u16 # 0x05 Palette RAM - .long execute_store_vram_u16 # 0x06 VRAM - .long execute_store_oam_u16 # 0x07 OAM RAM - .long execute_store_rtc_u16 # 0x08 gamepak - .long execute_store_ignore9_u16 # 0x09 gamepak - .long execute_store_ignoreA_u16 # 0x0A gamepak - .long execute_store_ignoreB_u16 # 0x0B gamepak - .long execute_store_ignoreC_u16 # 0x0C gamepak - .long execute_store_eeprom_u16 # 0x0D gamepak/eeprom - .long execute_store_ignoreE_u16 # 0x0E Flash ROM/SRAM - .long execute_store_ignoreF_u16 # 0x0F open address - - -patch_store_u16: - patch_handler store_u16_ftable, 0x0F - - - - -# Unsigned 32bit store handlers - -execute_store_ignore0_u32: - ignore_region 0, patch_store_u32 - -execute_store_ignore1_u32: - ignore_region 1, patch_store_u32 - -execute_store_ewram_u32: - translate_region_ewram_store_align32 patch_store_u32 - store_u32_smc (ewram + 0x8000) - -execute_store_u32: -execute_store_iwram_u32: - translate_region 3, patch_store_u32, (iwram + 0x8000), 0x7FFC - store_u32_smc (iwram + 0x8000) - -execute_store_io_u32: - region_check 4, patch_store_u32 - nop - andi $4, $4, 0x3FC # wrap around/align address - sw $ra, REG_SAVE3($16) # preserve $ra - - 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 - -execute_store_palette_u32: - region_check 5, patch_store_u32 - andi $2, $4, 0x3FC # wrap/align palette address - addu $2, $2, $16 - sw $5, 0x100($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 - sh $1, 0x500($2) - - srl $5, $5, 16 # shift down to next palette 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 - - jr $ra # return - sh $1, 0x502($2) - -execute_store_vram_u32: - translate_region_vram_store_align32 patch_store_u32 - store_u32 vram - -execute_store_oam_u32: - translate_region 7, patch_store_u32, oam_ram, 0x3FC - lui $1, %hi(oam_update) # write non-zero to oam_update - sw $1, %lo(oam_update)($1) # cheap, but this is non-zero - store_u32 oam_ram - -execute_store_ignore8_u32: - ignore_region 8, patch_store_u32 - -execute_store_ignore9_u32: - ignore_region 9, patch_store_u32 - -execute_store_ignoreA_u32: - ignore_region 10, patch_store_u32 - -execute_store_ignoreB_u32: - ignore_region 11, patch_store_u32 - -execute_store_ignoreC_u32: - ignore_region 12, patch_store_u32 - -execute_store_eeprom_u32: - store_function write_eeprom, 13, patch_store_u32, 0x3FC - -execute_store_ignoreE_u32: - ignore_region 14, patch_store_u32 - -execute_store_ignoreF_u32: - ignore_high patch_store_u32 - -store_u32_ftable: - .long execute_store_ignore0_u32 # 0x00 BIOS - .long execute_store_ignore1_u32 # 0x01 open address - .long execute_store_ewram_u32 # 0x02 EWRAM - .long execute_store_iwram_u32 # 0x03 IWRAM - .long execute_store_io_u32 # 0x04 I/O registers - .long execute_store_palette_u32 # 0x05 Palette RAM - .long execute_store_vram_u32 # 0x06 VRAM - .long execute_store_oam_u32 # 0x07 OAM RAM - .long execute_store_ignore8_u32 # 0x08 gamepak - .long execute_store_ignore9_u32 # 0x09 gamepak - .long execute_store_ignoreA_u32 # 0x0A gamepak - .long execute_store_ignoreB_u32 # 0x0B gamepak - .long execute_store_ignoreC_u32 # 0x0C gamepak - .long execute_store_eeprom_u32 # 0x0D gamepak/eeprom - .long execute_store_ignoreE_u32 # 0x0E Flash ROM/SRAM - .long execute_store_ignoreF_u32 # 0x0F open address - - -patch_store_u32: - patch_handler store_u32_ftable, 0x0F - - - -# Unsigned always aligned, a2 safe 32bit store handlers - -execute_store_ignore0_u32a: - ignore_region 0, patch_store_u32a - -execute_store_ignore1_u32a: - ignore_region 1, patch_store_u32a - -execute_store_ewram_u32a: - translate_region_ewram_store_align32 patch_store_u32a - store_u32 (ewram + 0x8000) - -execute_aligned_store32: -execute_store_iwram_u32a: - translate_region 3, patch_store_u32a, (iwram + 0x8000), 0x7FFC - store_u32 (iwram + 0x8000) - -execute_store_io_u32a: - region_check 4, patch_store_u32a + jr $2 # $2 = value returned nop - sw $6, REG_SAVE($16) # save a2 - sw $ra, REG_SAVE2($16) # save ra - - andi $4, $4, 0x3FC # wrap around/align address - - save_registers - jal write_io_register32 # write the value out - nop - - restore_registers - - lw $ra, REG_SAVE2($16) # restore ra - jr $ra - lw $6, REG_SAVE($16) # restore a2 - -execute_store_palette_u32a: - region_check 5, patch_store_u32a - andi $2, $4, 0x3FC # wrap/align palette address - addu $2, $2, $16 - sw $5, 0x100($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 - sh $1, 0x500($2) - - srl $5, $5, 16 # shift down to next palette 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 - - jr $ra # return - sh $1, 0x502($2) - -execute_store_vram_u32a: - translate_region_vram_store_align32 patch_store_u32a - store_u32 vram - -execute_store_oam_u32a: - translate_region 7, patch_store_u32a, oam_ram, 0x3FC - lui $1, %hi(oam_update) # write non-zero to oam_update - sw $1, %lo(oam_update)($1) # cheap, but this is non-zero - store_u32 oam_ram - -execute_store_ignore8_u32a: - ignore_region 8, patch_store_u32a - -execute_store_ignore9_u32a: - ignore_region 9, patch_store_u32a - -execute_store_ignoreA_u32a: - ignore_region 10, patch_store_u32a - -execute_store_ignoreB_u32a: - ignore_region 11, patch_store_u32a - -execute_store_ignoreC_u32a: - ignore_region 12, patch_store_u32a - -execute_store_eeprom_u32a: - store_function_a write_eeprom, 13, patch_store_u32a, 0x3FC - -execute_store_ignoreE_u32a: - ignore_region 14, patch_store_u32a - -execute_store_ignoreF_u32a: - ignore_high patch_store_u32a - -store_u32a_ftable: - .long execute_store_ignore0_u32a# 0x00 BIOS - .long execute_store_ignore1_u32a# 0x01 open address - .long execute_store_ewram_u32a # 0x02 EWRAM - .long execute_store_iwram_u32a # 0x03 IWRAM - .long execute_store_io_u32a # 0x04 I/O registers - .long execute_store_palette_u32a# 0x05 Palette RAM - .long execute_store_vram_u32a # 0x06 VRAM - .long execute_store_oam_u32a # 0x07 OAM RAM - .long execute_store_ignore8_u32a# 0x08 gamepak - .long execute_store_ignore9_u32a# 0x09 gamepak - .long execute_store_ignoreA_u32a# 0x0A gamepak - .long execute_store_ignoreB_u32a# 0x0B gamepak - .long execute_store_ignoreC_u32a# 0x0C gamepak - .long execute_store_eeprom_u32a # 0x0D gamepak/eeprom - .long execute_store_ignoreE_u32a# 0x0E Flash ROM/SRAM - .long execute_store_ignoreF_u32a# 0x0F open address - -patch_store_u32a: - patch_handler store_u32a_ftable, 0x0F write_io_epilogue: @@ -2491,8 +309,7 @@ write_io_epilogue: alert_loop: - jal update_gba # process the next event - nop + cfncall update_gba, 0 # process the next event lw $1, COMPLETED_FRAME($16) # Check whether we completed a frame bne $1, $0, return_to_main # Return to main thread now @@ -2519,16 +336,16 @@ no_alert: nop smc_dma: - jal flush_translation_cache_ram # flush translation cache - nop + cfncall flush_translation_cache_ram, 4 j lookup_pc nop smc_write: save_registers - jal flush_translation_cache_ram # flush translation cache - sw $6, REG_PC($16) # save PC (delay slot) + sw $6, REG_PC($16) # save PC + cfncall flush_translation_cache_ram, 4 +mips_lookup_pc: lookup_pc: lw $2, REG_CPSR($16) # $2 = cpsr andi $2, $2, 0x20 # isolate mode bit @@ -2536,17 +353,17 @@ lookup_pc: nop lookup_pc_thumb: - jal block_lookup_address_thumb # get Thumb address - lw $4, REG_PC($16) # load PC as arg 0 (delay slot) + lw $4, REG_PC($16) # load PC as arg 0 + cfncall block_lookup_address_thumb, 2 # get Thumb address restore_registers - jr $2 # jump to result + jr $2 # jump to result nop lookup_pc_arm: - jal block_lookup_address_arm # get ARM address - lw $4, REG_PC($16) # load PC as arg 0 (delay slot) + lw $4, REG_PC($16) # load PC as arg 0 + cfncall block_lookup_address_arm, 1 # get ARM address restore_registers - jr $2 # jump to result + jr $2 # jump to result nop # Return the current cpsr @@ -2578,8 +395,8 @@ execute_swi: ori $2, 0x13 # set mode to supervisor sw $2, REG_CPSR($16) # write back CPSR save_registers - jal set_cpu_mode # set the CPU mode to supervisor - li $4, 3 # 3 is supervisor mode (delay slot) + li $4, 3 # 3 is supervisor mode + cfncall set_cpu_mode, 5 # set the CPU mode to supervisor restore_registers lw $ra, ($sp) # pop $ra jr $ra # return @@ -2601,8 +418,7 @@ execute_spsr_restore: addiu $sp, $sp, -4 sw $ra, ($sp) save_registers - jal execute_spsr_restore_body # do the dirty work in this C function - nop + cfncall execute_spsr_restore_body, 6 # do the dirty work in this C function restore_registers addu $4, $2, $0 # move return value to $4 lw $ra, ($sp) @@ -2624,27 +440,26 @@ execute_store_cpsr: and $2, $2, $4 # $2 = (cpsr & (~store_mask)) or $1, $1, $2 # $1 = new cpsr combined with old extract_flags_body # extract flags from $1 - addiu $sp, $sp, -4 - sw $ra, ($sp) + sw $ra, REG_SAVE3($16) save_registers - jal execute_store_cpsr_body # do the dirty work in this C function - addu $4, $1, $0 # load the new CPSR (delay slot) + addu $4, $1, $0 # load the new CPSR + cfncall execute_store_cpsr_body, 7 # do the dirty work in this C function bne $2, $0, changed_pc_cpsr # this could have changed the pc nop restore_registers - lw $ra, ($sp) + lw $ra, REG_SAVE3($16) jr $ra - addiu $sp, $sp, 4 + nop changed_pc_cpsr: - jal block_lookup_address_arm # GBA address is in $4 - addu $4, $2, $0 # load new address in $4 (delay slot) - restore_registers # restore registers - jr $2 # jump to the new address - addiu $sp, $sp, 4 # get rid of the old ra (delay slot) + addu $4, $2, $0 # load new address in $4 + cfncall block_lookup_address_arm, 1 # GBA address is in $4 + restore_registers # restore registers + jr $2 # jump to the new address + nop # $4: new spsr @@ -2747,8 +562,9 @@ ror_zero_shift: rotrv $4, $4, $5 # return (value ror shift) delay # $4: cycle counter argument +# $5: pointer to reg -execute_arm_translate: +execute_arm_translate_internal: add $sp, $sp, -48 # Store the main thread context sw $s0, 0($sp) sw $s1, 4($sp) @@ -2761,9 +577,7 @@ execute_arm_translate: sw $fp, 32($sp) sw $ra, 36($sp) - lui $16, %hi(reg) # load reg address into base reg - addiu $16, %lo(reg) - + move $16, $5 sw $28, GP_SAVE($16) addu $17, $4, $0 # load cycle counter register @@ -2780,15 +594,13 @@ execute_arm_translate: bne $1, $0, 1f lw $4, REG_PC($16) # load PC into $4 (delay) - jal block_lookup_address_arm # lookup initial jump address - nop + cfncall block_lookup_address_arm, 1 restore_registers # load initial register values jr $2 # jump to return nop 1: - jal block_lookup_address_thumb # lookup initial jump address - nop + cfncall block_lookup_address_thumb, 2 restore_registers # load initial register values jr $2 # jump to return nop @@ -2797,11 +609,14 @@ execute_arm_translate: .data .align 6 +memory_map_write: + .space 0x8000 + memory_map_read: .space 0x8000 -# This must be between memory_map_read and memory_map_write because it's used -# to calculate their addresses elsewhere in this file. +# memory_map_read is immediately before arm_reg on purpose (offset used +# to access it, via lw op). We do not use write though. reg: .space 0x100 @@ -2815,5 +630,22 @@ spsr: reg_mode: .space 196 # u32[7][7]; -memory_map_write: - .space 0x8000 +# Here we store: +# void *tmemld[11][16]; # 10 types of loads +# void *tmemst[ 4][16]; # 3 types of stores +# Essentially a list of pointers to the different mem load handlers +# Keep them close for a fast patcher. +tmemld: + .space 704 +tmemst: + .space 256 +fnptrs: + .long update_gba # 0 + .long block_lookup_address_arm # 1 + .long block_lookup_address_thumb # 2 + .long block_lookup_address_dual # 3 + .long flush_translation_cache_ram # 4 + .long set_cpu_mode # 5 + .long execute_spsr_restore_body # 6 + .long execute_store_cpsr_body # 7 + |