LowLevel/Luma3DS-3GX
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Fix crt0 & include missing files

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TuxSH 2017-05-19 21:56:20 +02:00
parent ab14e77b50
commit ee880802c8
3 changed files with 95 additions and 3 deletions
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44
loader/source/firm.c Normal file
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@ -0,0 +1,44 @@
/*
* This file is part of Luma3DS
* Copyright (C) 2017 Aurora Wright, TuxSH
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Additional Terms 7.b of GPLv3 applies to this file: Requiring preservation of specified
* reasonable legal notices or author attributions in that material or in the Appropriate Legal
* Notices displayed by works containing it.
*/
#include "firm.h"
#include "memory.h"
#include "cache.h"
void launchFirm(Firm *firm, int argc, char **argv)
{
//Copy FIRM sections to respective memory locations
for(u32 sectionNum = 0; sectionNum < 4 && firm->section[sectionNum].size != 0; sectionNum++)
memcpy(firm->section[sectionNum].address, (u8 *)firm + firm->section[sectionNum].offset, firm->section[sectionNum].size);
//Set ARM11 entrypoint
*(vu32 *)0x1FFFFFFC = (u32)firm->arm11Entry;
//Ensure that all memory transfers have completed and that the caches have been flushed
flushCaches();
//Jump to ARM9 entrypoint. Also give it additional arguments it can dismiss
((void (*)(int, char**, u32))firm->arm9Entry)(argc, argv, 0x0000BEEF);
__builtin_unreachable();
}

46
loader/source/firm.h Normal file
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@ -0,0 +1,46 @@
/*
* This file is part of Luma3DS
* Copyright (C) 2017 Aurora Wright, TuxSH
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Additional Terms 7.b of GPLv3 applies to this file: Requiring preservation of specified
* reasonable legal notices or author attributions in that material or in the Appropriate Legal
* Notices displayed by works containing it.
*/
#pragma once
#include "types.h"
typedef struct __attribute__((packed))
{
u32 offset;
u8 *address;
u32 size;
u32 procType;
u8 hash[0x20];
} FirmSection;
typedef struct __attribute__((packed))
{
char magic[4];
u32 reserved1;
u8 *arm11Entry;
u8 *arm9Entry;
u8 reserved2[0x30];
FirmSection section[4];
} Firm;
void launchFirm(Firm *firm, int argc, char **argv);

8
source/start.s
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@ -33,6 +33,9 @@ _start:
cmp r2, r4
movne r0, #0 @ check magic word
mov r9, r0
mov r10, r1
@ Change the stack pointer
mov sp, #0x27000000
@ -47,8 +50,6 @@ _start:
bl flushEntireDCache
bl flushEntireICache
push {r0-r3}
@ Give read/write access to all the memory regions
ldr r0, =0x3333333
mcr p15, 0, r0, c5, c0, 2 @ write data access
@ -97,5 +98,6 @@ _start:
sub r2, r0
bl memset32
pop {r0-r3}
mov r0, r9
mov r1, r10
b main