mirror of
https://gitlab.com/Nanolx/homebrewfilter.git
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124 lines
2.5 KiB
ArmAsm
124 lines
2.5 KiB
ArmAsm
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/*
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TinyLoad - a simple region free (original) game launcher in 4k
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# This code is licensed to you under the terms of the GNU GPL, version 2;
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# see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
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# This code comes from the Twilight Hack
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# Copyright 2008-2009 Segher Boessenkool <segher@kernel.crashing.org>
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# Slightly modified to imitate the homebrew channel stub
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*/
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.set r0,0; .set r1,1; .set r2,2; .set r3,3; .set r4,4;
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.set r5,5; .set r6,6; .set r7,7; .set r8,8; .set r9,9;
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.set r10,10; .set r11,11; .set r12,12; .set r13,13; .set r14,14;
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.set r15,15; .set r16,16; .set r17,17; .set r18,18; .set r19,19;
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.set r20,20; .set r21,21; .set r22,22; .set r23,23; .set r24,24;
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.set r25,25; .set r26,26; .set r27,27; .set r28,28; .set r29,29;
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.set r30,30; .set r31,31;
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#include "hw.h"
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.globl _start
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_start:
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mfmsr r3
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rlwinm r4,r3,0,17,15 # MSR_EE
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rlwinm r4,r4,0,26,24 # MSR_IP
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mtmsr r4
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isync
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lis r3,_setup@h
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ori r3,r3,_setup@l
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clrlwi r3,r3,2
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mtsrr0 r3
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mfmsr r3
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li r4,MSR_IR|MSR_DR
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andc r3,r3,r4
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mtsrr1 r3
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rfi
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#0001 0001 0000 1100 0110 0100
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#BHT,BTIC,DCFA,DCFI,ICFI,NHR,DPM
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_setup:
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lis r3,0x11
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ori r3,r3,0xC64 #0x110C64
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mtspr rHID0,r3
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isync
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li r4,MSR_FP
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mtmsr r4
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ori r3,r3,HID0_ICE|HID0_DCE
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mtspr rHID0,r3
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isync
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li r0,0
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mtibatu 0,r0
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mtibatu 1,r0
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mtibatu 2,r0
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mtibatu 3,r0
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mtdbatu 0,r0
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mtdbatu 1,r0
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mtdbatu 2,r0
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mtdbatu 3,r0
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#mtibatl 0,r0
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mtspr 560,r0
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mtspr 562,r0
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mtspr 564,r0
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mtspr 566,r0
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mtspr 568,r0
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mtspr 570,r0
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mtspr 572,r0
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mtspr 574,r0
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isync
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lis r0,0x8000
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mtsr 0,r0
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mtsr 1,r0
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mtsr 2,r0
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mtsr 3,r0
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mtsr 4,r0
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mtsr 5,r0
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mtsr 6,r0
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mtsr 7,r0
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mtsr 8,r0
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mtsr 9,r0
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mtsr 10,r0
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mtsr 11,r0
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mtsr 12,r0
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mtsr 13,r0
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mtsr 14,r0
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mtsr 15,r0
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isync
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li r3,2 #0x00000000|PP=2
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lis r4,0x8000
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ori r4,r4,0x1FFF #0x80000000|256Mbytes|VS|VP
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mtibatl 0,r3
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mtibatu 0,r4
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mtdbatl 0,r3
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mtdbatu 0,r4
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isync
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addis r3,r3,0x1000 #0x10000000|PP=2
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addis r4,r4,0x1000 #0x90000000|256Mbytes|VS|VP
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mtspr 561,r3
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mtspr 560,r4
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mtspr 569,r3
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mtspr 568,r4
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isync
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li r3,0x2A #0x00000000|I|G|PP=2
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lis r4,0xC000
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ori r4,r4,0x1FFF #0xC0000000|256Mbytes|VS|VP
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mtdbatu 1,r3
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mtdbatu 1,r4
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isync
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addis r3,r3,0x1000 #0x10000000|I|G|PP=2
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addis r4,r4,0x1000 #0xD0000000|256Mbytes|VS|VP
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mtspr 571,r3
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mtspr 570,r4
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isync
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lis r3,0x8200
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mtspr 1011,r3
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lis r3,0x8000
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ori r3,r3,0x4000
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mtsrr0 r3
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mfmsr r3
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ori r3,r3,MSR_DR|MSR_IR
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mtsrr1 r3
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rfi
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