Pre-IPL ROM Stage disassembled code
Pre-IPLROM Stage
Dumped from Motherboard: TA-081
ROM:BFC00000 # =============== S U B R O U T I N E ======================================= ROM:BFC00000 ROM:BFC00000 ROM:BFC00000 __start: # CODE XREF: ROM:BFC00200j ROM:BFC00000 ctc0 $v0, $4 ROM:BFC00004 lw $v0, 0xBC100000 # check Number of NMI that occured ROM:BFC00004 # from System Config Register ROM:BFC0000C bnez $v0, loc_BFC00064 ROM:BFC00010 nop ROM:BFC00014 ctc0 $zero, $9 ROM:BFC00018 jal pspClearDcache ROM:BFC0001C nop ROM:BFC00020 jal pspClearIcache ROM:BFC00024 nop ROM:BFC00028 lui $a0, 0xA001 ROM:BFC0002C la $a1, RAM_PAYLOAD ROM:BFC00034 li $a2, 0xAF8 ROM:BFC00038 ROM:BFC00038 loc_BFC00038: # CODE XREF: __start+48j ROM:BFC00038 lw $t0, 0($a1) # this loop copy code ROM:BFC00038 # from[0xbfc00280] ROM:BFC00038 # to[0xa0010000]size[0xAF8] ROM:BFC0003C addiu $a1, 4 ROM:BFC00040 sw $t0, 0($a0) ROM:BFC00044 addiu $a2, -4 ROM:BFC00048 bgtz $a2, loc_BFC00038 ROM:BFC0004C addiu $a0, 4 ROM:BFC00050 li $sp, 0x80013FF0 # setup temp stack point ROM:BFC00058 lui $t9, 0x8001 ROM:BFC0005C jr $t9 # jump to RAM c entry[0x80010000] ROM:BFC00060 sync ROM:BFC00064 # --------------------------------------------------------------------------- ROM:BFC00064 ROM:BFC00064 loc_BFC00064: # CODE XREF: __start+Cj ROM:BFC00064 cfc0 $v0, $9 ROM:BFC00068 beqz $v0, loc_BFC00078 ROM:BFC0006C nop ROM:BFC00070 jr $v0 ROM:BFC00074 nop ROM:BFC00078 # --------------------------------------------------------------------------- ROM:BFC00078 ROM:BFC00078 loc_BFC00078: # CODE XREF: __start+68j ROM:BFC00078 cfc0 $v0, $4 ROM:BFC0007C mfc0 $k1, SR # Clear status reg bit22 ROM:BFC0007C # "Bootstrap Exception Vector" ROM:BFC00080 li $k0, 0xFFBFFFFF ROM:BFC00088 and $k1, $k0 ROM:BFC0008C mtc0 $k1, SR ROM:BFC00090 mfc0 $k0, $25 # Return ISR ROM:BFC00094 jr $k0 ROM:BFC00098 nop ROM:BFC00098 # End of function __start ROM:BFC00098 ROM:BFC00098 # --------------------------------------------------------------------------- ROM:BFC0009C Filling: .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC0009C .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ROM:BFC00200 # --------------------------------------------------------------------------- ROM:BFC00200 b __start # General exception Vector Address when BEV==1 ROM:BFC00200 # --------------------------------------------------------------------------- ROM:BFC00204 .word 0 ROM:BFC00208 ROM:BFC00208 # =============== S U B R O U T I N E ======================================= ROM:BFC00208 ROM:BFC00208 ROM:BFC00208 pspClearIcache: # CODE XREF: __start+20p ROM:BFC00208 mfc0 $t0, Config # Configuration register ROM:BFC0020C li $t1, 0x1000 # cache size is given by 2^(12+IC) ROM:BFC0020C # 0x1000 = 2^12 ROM:BFC00210 ext $t0, 9, 3 ROM:BFC00214 sllv $t1, $t0 # calc cache size ROM:BFC00218 mtc0 $zero, TagLo # Cache Tag register ROM:BFC0021C mtc0 $zero, TagHi # Cache Tag register ROM:BFC00220 move $t0, $zero ROM:BFC00224 ROM:BFC00224 loc_BFC00224: # CODE XREF: pspClearIcache+28j ROM:BFC00224 cache 1, 0($t0) # Index Invalidate (primary data cache) ROM:BFC00228 cache 3, 0($t0) # Index Invalidate (secondary data cache) ROM:BFC0022C addiu $t0, 0x40 ROM:BFC00230 bne $t0, $t1, loc_BFC00224 ROM:BFC00234 nop ROM:BFC00238 jr $ra ROM:BFC0023C nop ROM:BFC0023C # End of function pspClearIcache ROM:BFC0023C ROM:BFC00240 ROM:BFC00240 # =============== S U B R O U T I N E ======================================= ROM:BFC00240 ROM:BFC00240 ROM:BFC00240 pspClearDcache: # CODE XREF: __start+18p ROM:BFC00240 mfc0 $t0, Config # Configuration register ROM:BFC00244 li $t1, 0x1000 ROM:BFC00248 ext $t0, 6, 3 ROM:BFC0024C sllv $t1, $t0 ROM:BFC00250 mtc0 $zero, TagLo # Cache Tag register ROM:BFC00254 mtc0 $zero, TagHi # Cache Tag register ROM:BFC00258 move $t0, $zero ROM:BFC0025C ROM:BFC0025C loc_BFC0025C: # CODE XREF: pspClearDcache+28j ROM:BFC0025C cache 0x11, 0($t0) # Hit Invalidate (primary data cache) ROM:BFC00260 cache 0x13, 0($t0) # Hit Invalidate (secondary data cache) ROM:BFC00264 addiu $t0, 0x40 ROM:BFC00268 bne $t0, $t1, loc_BFC0025C ROM:BFC0026C nop ROM:BFC00270 jr $ra ROM:BFC00270 # End of function pspClearDcache ROM:BFC00270 ROM:BFC00270 # --------------------------------------------------------------------------- ROM:BFC00274 .word 0 ROM:BFC00278 .word 0 ROM:BFC0027C .word 0 ROM:BFC00280 RAM_PAYLOAD: .word 0x3C048001, 0x24840A80, 0xC0041AC, 0, 0x3C08BC10 # DATA XREF: __start+2Co ROM:BFC00280 .word 0x8D090068, 0x94C02, 0x11200005, 0, 0x8D090078, 0x35290800 … … ROM:BFC00FB0 aCopyrightC2004:.ascii "Copyright (C) 2004 Sony Computer Entertainment Inc. All right" ROM:BFC00FB0 .ascii "s reserved."<0> ROM:BFC00FF9 .byte 0 ROM:BFC00FFA .byte 0 ROM:BFC00FFB .byte 0 ROM:BFC00FFC .word 0x20040420 ROM:BFC00FFC ROM:BFC00FFC # end