mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
synced 2024-12-25 19:31:58 +01:00
257 lines
4.6 KiB
ArmAsm
257 lines
4.6 KiB
ArmAsm
# Copyright 2008-2009 Segher Boessenkool <segher@kernel.crashing.org>
|
|
# This code is licensed to you under the terms of the GNU GPL, version 2;
|
|
# see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
|
|
.set r0,0; .set r1,1; .set r2,2; .set r3,3; .set r4,4;
|
|
.set r5,5; .set r6,6; .set r7,7; .set r8,8; .set r9,9;
|
|
.set r10,10; .set r11,11; .set r12,12; .set r13,13; .set r14,14;
|
|
.set r15,15; .set r16,16; .set r17,17; .set r18,18; .set r19,19;
|
|
.set r20,20; .set r21,21; .set r22,22; .set r23,23; .set r24,24;
|
|
.set r25,25; .set r26,26; .set r27,27; .set r28,28; .set r29,29;
|
|
.set r30,30; .set r31,31;
|
|
|
|
#include "hw.h"
|
|
|
|
.globl _start
|
|
_start:
|
|
mfmsr r3
|
|
rlwinm r4,r3,0,17,15 # MSR_EE
|
|
rlwinm r4,r4,0,26,24 # MSR_IP
|
|
mtmsr r4
|
|
isync
|
|
lis r3,_setup@h
|
|
ori r3,r3,_setup@l
|
|
clrlwi r3,r3,2
|
|
mtsrr0 r3
|
|
mfmsr r3
|
|
li r4,MSR_IR|MSR_DR
|
|
andc r3,r3,r4
|
|
mtsrr1 r3
|
|
rfi
|
|
|
|
#0001 0001 0000 1100 0110 0100
|
|
#BHT,BTIC,DCFA,DCFI,ICFI,NHR,DPM
|
|
_setup:
|
|
lis r3,0x11
|
|
ori r3,r3,0xC64 #0x110C64
|
|
mtspr rHID0,r3
|
|
isync
|
|
li r4,MSR_FP
|
|
mtmsr r4
|
|
ori r3,r3,HID0_ICE|HID0_DCE
|
|
mtspr rHID0,r3
|
|
isync
|
|
li r0,0
|
|
mtibatu 0,r0
|
|
mtibatu 1,r0
|
|
mtibatu 2,r0
|
|
mtibatu 3,r0
|
|
mtdbatu 0,r0
|
|
mtdbatu 1,r0
|
|
mtdbatu 2,r0
|
|
mtdbatu 3,r0
|
|
#mtibatl 0,r0
|
|
mtspr 560,r0
|
|
mtspr 562,r0
|
|
mtspr 564,r0
|
|
mtspr 566,r0
|
|
mtspr 568,r0
|
|
mtspr 570,r0
|
|
mtspr 572,r0
|
|
mtspr 574,r0
|
|
isync
|
|
lis r0,0x8000
|
|
mtsr 0,r0
|
|
mtsr 1,r0
|
|
mtsr 2,r0
|
|
mtsr 3,r0
|
|
mtsr 4,r0
|
|
mtsr 5,r0
|
|
mtsr 6,r0
|
|
mtsr 7,r0
|
|
mtsr 8,r0
|
|
mtsr 9,r0
|
|
mtsr 10,r0
|
|
mtsr 11,r0
|
|
mtsr 12,r0
|
|
mtsr 13,r0
|
|
mtsr 14,r0
|
|
mtsr 15,r0
|
|
isync
|
|
li r3,2 #0x00000000|PP=2
|
|
lis r4,0x8000
|
|
ori r4,r4,0x1FFF #0x80000000|256Mbytes|VS|VP
|
|
mtibatl 0,r3
|
|
mtibatu 0,r4
|
|
mtdbatl 0,r3
|
|
mtdbatu 0,r4
|
|
isync
|
|
addis r3,r3,0x1000 #0x10000000|PP=2
|
|
addis r4,r4,0x1000 #0x90000000|256Mbytes|VS|VP
|
|
mtspr 561,r3
|
|
mtspr 560,r4
|
|
mtspr 569,r3
|
|
mtspr 568,r4
|
|
isync
|
|
li r3,0x2A #0x00000000|I|G|PP=2
|
|
lis r4,0xC000
|
|
ori r4,r4,0x1FFF #0xC0000000|256Mbytes|VS|VP
|
|
mtdbatu 1,r3
|
|
mtdbatu 1,r4
|
|
isync
|
|
addis r3,r3,0x1000 #0x10000000|I|G|PP=2
|
|
addis r4,r4,0x1000 #0xD0000000|256Mbytes|VS|VP
|
|
mtspr 571,r3
|
|
mtspr 570,r4
|
|
isync
|
|
lis r3,0x8200
|
|
mtspr 1011,r3
|
|
lis r3,_init@h
|
|
ori r3,r3,_init@l
|
|
mtsrr0 r3
|
|
mfmsr r3
|
|
ori r3,r3,MSR_DR|MSR_IR
|
|
mtsrr1 r3
|
|
rfi
|
|
|
|
.extern _main
|
|
#TODO - fixup memset
|
|
_init:
|
|
bl __init_registers
|
|
bl __init_memory
|
|
bl __init_syscall
|
|
bl __init_sprs
|
|
lis r3,__bss_start@h
|
|
ori r3,r3,__bss_start@l
|
|
li r4,0
|
|
lis r5,__bss_end@h
|
|
ori r5,r5,__bss_end@l
|
|
subf r5,r3,r5
|
|
bl _memset
|
|
lis r3,__stack_end@h
|
|
ori r3,r3,__stack_end@l
|
|
li r4,0
|
|
lis r5,__stack_top@h
|
|
ori r5,r5,__stack_top@l
|
|
subf r5,r3,r5
|
|
bl _memset
|
|
bl _main
|
|
0:
|
|
b 0b
|
|
|
|
__init_registers:
|
|
li r0,0
|
|
li r3,0
|
|
li r4,0
|
|
li r5,0
|
|
li r6,0
|
|
li r7,0
|
|
li r8,0
|
|
li r9,0
|
|
li r10,0
|
|
li r11,0
|
|
li r12,0
|
|
li r14,0
|
|
li r15,0
|
|
li r16,0
|
|
li r17,0
|
|
li r18,0
|
|
li r19,0
|
|
li r20,0
|
|
li r21,0
|
|
li r22,0
|
|
li r23,0
|
|
li r24,0
|
|
li r25,0
|
|
li r26,0
|
|
li r27,0
|
|
li r28,0
|
|
li r29,0
|
|
li r30,0
|
|
li r31,0
|
|
lis r1,__stack_top@h
|
|
ori r1,r1,__stack_top@l
|
|
addi r1,r1,-4
|
|
stw r0,0(r1)
|
|
stwu r1,-0x38(r1)
|
|
lis r2,0
|
|
ori r2,r2,0x8000
|
|
lis r13,0
|
|
ori r13,r13,0x8000
|
|
blr
|
|
|
|
_memset:
|
|
clrlwi. r6,r5,29
|
|
rlwinm r5,r5,30,2,31
|
|
addi r3,r3,-4
|
|
mtctr r5
|
|
0:
|
|
stwu r4,4(r3)
|
|
bdnz+ 0b
|
|
cmplwi r6,0
|
|
beq- 2f
|
|
1:
|
|
stbu r4,1(r3)
|
|
addic. r6,r6,-1
|
|
bne+ 1b
|
|
2:
|
|
blr
|
|
|
|
__init_memory:
|
|
mflr r0
|
|
stw r0, 0x04(r1)
|
|
stwu r1,-0x10(r1)
|
|
stw r31,0x0C(r1)
|
|
mfspr r3,rHID0
|
|
rlwinm r0,r3,0,16,16 #HID0[ICE]
|
|
cmplwi r0,0
|
|
bne- 0f
|
|
bl ICacheEnable
|
|
0:
|
|
mfspr r3,rHID0
|
|
rlwinm r0,r3,0,17,17 #HID0[DCE]
|
|
cmplwi r0,0
|
|
bne- 1f
|
|
bl DCacheEnable
|
|
1:
|
|
mfl2cr r3
|
|
rlwinm r0,r3,0,0,0 #L2CR[L2E]
|
|
cmplwi r0,0
|
|
bne- 2f
|
|
bl L2_Init
|
|
bl L2_Enable
|
|
2:
|
|
lwz r0, 0x14(r1)
|
|
lwz r31,0x0C(r1)
|
|
addi r1,r1,0x10
|
|
mtlr r0
|
|
blr
|
|
|
|
__init_sprs:
|
|
mflr r0
|
|
stw r0, 0x04(r1)
|
|
stwu r1,-0x18(r1)
|
|
stw r31,0x14(r1)
|
|
stw r30,0x10(r1)
|
|
stw r29,0x0C(r1)
|
|
li r3,0
|
|
mtmmcr0 r3
|
|
mtmmcr1 r3
|
|
mtpmc1 r3
|
|
mtpmc2 r3
|
|
mtpmc3 r3
|
|
mtpmc4 r3
|
|
mfspr r3,rHID0
|
|
ori r3,r3,HID0_SPD #HID0[SPD]
|
|
mtspr rHID0,r3
|
|
mfspr r3,rHID2
|
|
rlwinm r3,r3,0,2,0 #HID2[WPE]
|
|
mtspr rHID2,r3
|
|
lwz r0, 0x1C(r1)
|
|
lwz r31,0x14(r1)
|
|
lwz r30,0x10(r1)
|
|
lwz r29,0x0C(r1)
|
|
addi r1,r1,0x18
|
|
mtlr r0
|
|
blr
|
|
|