mirror of
https://gitlab.com/kholdfuzion/goldeneye_src
synced 2026-08-28 00:01:43 -04:00
KholdFuzion
109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
#include <ultra64.h>
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#include "boot.h"
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#include <bondgame.h>
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#include "inflate/inflate.h"
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/**
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* @file boot.c
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* This file sets up initial tlb mapping then jumps to boot1.
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*
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* In particular, it:
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* - also contains functions that grab segment addresses
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* - will likely always be asm as it manipulates tlb directly
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*/
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/**
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* 1050 70000450 registers 70000000-70400000 in TLB, JR to 70000510
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* technically, this is used in bootcode and used prior to TLB registration
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*/
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GLOBAL_ASM(
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glabel boot
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/* 001050 70000450 24020001 */ li $v0, 1
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/* 001054 70000454 24030000 */ li $v1, 0
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/* 001058 70000458 24040000 */ li $a0, 0
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/* 00105C 7000045C 3C057000 */ lui $a1, 0x7000
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/* 001060 70000460 2406001F */ li $a2, 31
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/* 001064 70000464 24070001 */ li $a3, 1
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/* 001068 70000468 3C08007F */ lui $t0, (0x007FE000 >> 16) # lui $t0, 0x7f
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/* 00106C 7000046C 3508E000 */ ori $t0, (0x007FE000 & 0xFFFF) # ori $t0, $t0, 0xe000
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/* 001070 70000470 40820000 */ mtc0 $v0, $0
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/* 001074 70000474 00031B02 */ srl $v1, $v1, 0xc
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/* 001078 70000478 00031980 */ sll $v1, $v1, 6
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/* 00107C 7000047C 00661821 */ addu $v1, $v1, $a2
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/* 001080 70000480 40831000 */ mtc0 $v1, $2
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/* 001084 70000484 00042302 */ srl $a0, $a0, 0xc
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/* 001088 70000488 00042180 */ sll $a0, $a0, 6
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/* 00108C 7000048C 00872021 */ addu $a0, $a0, $a3
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/* 001090 70000490 40841800 */ mtc0 $a0, $3
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/* 001094 70000494 00052342 */ srl $a0, $a1, 0xd
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/* 001098 70000498 00042340 */ sll $a0, $a0, 0xd
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/* 00109C 7000049C 40845000 */ mtc0 $a0, $10
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/* 0010A0 700004A0 40882800 */ mtc0 $t0, $5
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/* 0010A4 700004A4 00000000 */ nop
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/* 0010A8 700004A8 42000002 */ tlbwi
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/* 0010AC 700004AC 3C0A7000 */ lui $t2, %hi(init) # $t2, 0x7000
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/* 0010B0 700004B0 254A0510 */ addiu $t2, %lo(init) # addiu $t2, $t2, 0x510
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/* 0010B4 700004B4 01400008 */ jr $t2
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/* 0010B8 700004B8 00000000 */ nop
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)
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/**
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* Due to alignments the following functions are included here
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* these could have been assembly originally, or more likely part
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* of the code inserted by the custom makerom rare created
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*/
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/**
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*10BC 700004BC V0=80020D90: target address for 21990 (USA)
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*/
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u32 get_csegmentSegmentStart(void)
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{
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return &_csegmentSegmentStart;
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}
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/**
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*10C8 700004C8 V0=21990: ROM address of main compressed block (USA)
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*/
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u32 get_cdataSegmentRomStart(void)
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{
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return &_cdataSegmentRomStart;
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}
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/**
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*10D4 700004D4 V0=33590: ROM address of 70200000 inflate ASM [33590-34B30 ROM] (USA)
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*/
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u32 get_cdataSegmentRomEnd(void)
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{
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return &_cdataSegmentRomEnd;
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}
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/**
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*10E0 700004E0 V0=33590: ROM address of 70200000 inflate ASM [33590-34B30 ROM] (USA)
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*/
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u32 get_inflateSegmentRomStart(void)
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{
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return &_inflateSegmentRomStart;
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}
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/**
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*10EC 700004EC V0=34B30: ROM address of 7F- TLB routines (USA)
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*/
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u32 get_inflateSegmentRomEnd(void)
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{
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return &_inflateSegmentRomEnd;
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}
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/**
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* 10F8 700004F8 redirect to 7020141C: decompression routine
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* accepts: A0=p->source, A1=p->target, A2=p->buffer
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* sets A3=7020141C, then jumps to address
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*/
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GLOBAL_ASM(
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glabel jump_decompressfile
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/* 0010F8 700004F8 3C077020 */ lui $a3, %hi(decompress_entry) # $a3, 0x7020
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/* 0010FC 700004FC 24E7141C */ addiu $a3, %lo(decompress_entry) # addiu $a3, $a3, 0x141c
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/* 001100 70000500 00E00008 */ jr $a3
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/* 001104 70000504 00000000 */ nop
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)
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