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armlinux_boot.ASM
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;
; This file is part of Badadroid project.
;
; Copyright (C) 2013 B_kubica, Mijoma, ihavenick, Rebellos, Tigrouzen
;
;
; Badadroid 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.
;
; Badadroid 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 Badadroid. If not, see <http://www.gnu.org/licenses/>.
;
;
include 'inc/settings.inc' ; user dependend settings
START
B bootkernel
bootkernel_helper:
code_len = bootkernel_helper - c_start
db 0x1000 - code_len dup 0x00
bootkernel: ;0x43201000 on 2.0 new release ;0x43801000 on 8530JPKA1
SUB SP, SP, 128
MOV r1, #1
LDR r0, [pagetable]
BL MemMMUCacheEnable
MOV R8, R0 ;lets store previous MMU control register to turn it off later
bl enable_output
LDR R0, [used_download]
CMP R0, 0
BNE code_loaded
BL __PfsNandInit
BL __PfsMassInit
BL MemoryCardMount
MOV R1, SP
LDR R0, [s_kernel_path_a]
BL tfs4_stat
BL hex_debugprint
LDR R2, [SP,0xC] ;get kernel size
LDR R0, [kernel_size_a]
STR R2, [R0] ;store for later use
LDR R0, [R0]
BL hex_debugprint
LDR R2, [kernel_size_a]
LDR R2, [R2]
LDR R1, [kernel_buf]
LDR R0, [s_kernel_path_a]
BL loadfile
code_loaded:
LDR R0, [s_10_a]
BL debug_print
LDR R0, [s_1_a]
BL debug_print
LDR R0, [s_2_a]
BL debug_print
LDR R0, [s_3_a]
BL debug_print
LDR R0, [s_4_a]
BL debug_print
LDR R0, [s_5_a]
BL debug_print
LDR R0, [s_6_a]
BL debug_print
LDR R0, [s_7_a]
BL debug_print
LDR R0, [s_8_a]
BL debug_print
LDR R0, [s_9_a]
BL debug_print
MCR p15, 0, R8,c1,c0 ;turn off MMUCache with previous gained MMU control reg
BL _CoDisableMmu
BL DRV_Modem_BootingStart
LDR R0, [ATAG_ptr]
MOV R1, 0x00
MOV R2, 512
BL rebell_fillmem ;clear memory there
LDR R2, [ATAG_ptr]
; I9000 SBL uses full ATAG_CORE struct (length 5 instead of 2) but short ATAG struct works aswell
; http://www.simtec.co.uk/products/SWLINUX/files/booting_article.html#ATAG_CORE
MOV R0, 2
STR R0, [R2]
ADD R2, R2, 4
LDR R0, [ATAG_CORE]
STR R0, [R2]
ADD R2, R2, 4
;giving some random serial number 0x123 0x456
MOV R0, 4
STR R0, [R2]
ADD R2, R2, 4
LDR R0, [ATAG_SERIAL]
STR R0, [R2]
ADD R2, R2, 4
MOV R0, 0x00000123
STR R0, [R2]
ADD R2, R2, 4
MOV R0, 0x00000456
STR R0, [R2]
ADD R2, R2, 4
;passing hardcoded I9000 Sbl revision (0x30), we can get real chip_revision but I don't feel it necessary for now
MOV R0, 3
STR R0, [R2]
ADD R2, R2, 4
LDR R0, [ATAG_REVISION]
STR R0, [R2]
ADD R2, R2, 4
MOV R0, 0x30
STR R0, [R2]
ADD R2, R2, 4
LDR R0, [s_atagcmdline_a]
BL rebell_strlen
ADD R0, R0, 1 ;include zero-ending
MOV R5, R0
MOV R0, R5
ADD R0, R0, 0xD
MOV R0, R0,LSR#2
STR R0, [R2] ;(sizeof(struct atag_header) + linelen + 1 + 4) >> 2 don't ask me why O.o
ADD R2, R2, 4
LDR R0, [ATAG_CMDLINE]
STR R0, [R2]
ADD R2, R2, 4
MOV R6, R2
LDR R0, [s_atagcmdline_a] ;src
MOV R1, R2 ;dst
MOV R2, R5 ;size
BL rebell_memcpy
MOV R2, R6
; SUB R5, R5, 2
ADD R2, R2, R5, LSL#2 ;add length of string*2 (mem is zeroed anyway)
MOV R0, 0 ;ATAG_NONE size
STR R0, [R2]
ADD R2, R2, 4
MOV R0, 0 ;ATAG_NONE
STR R0, [R2] ;thats the whole ATAG struct
BL relockernel
LDR R0, [SYSCON_NORMAL_CFG]
LDR R1, [R0]
; BIC R1, R1, 0xBE ;turn off all power-managed S5PC110 blocks, this will reset LCD controller :)
STR R1, [R0]
MOV R1, 0xFFFFFFFF
STR R1, [R0] ;POWAH ON EVRYTHINKS (clock registers in all modules must be available for kernel)
BL _CoDisableDCache
BL _System_DisableVIC
BL _System_DisableIRQ
BL _System_DisableFIQ
LDR R1, [kernel_start_a]
MOV R0, 0 ;must be 0
LDR R1, [mach_id] ;load 8500 or 8530, depending on the model which for FOTA is compiled
LDR R2, [ATAG_ptr]
LDR R5, [kernel_start_a]
BLX R5
loop_forever:
b loop_forever
relockernel:
STMFD SP!, {R0-R2,LR}
LDR R0, [kernel_buf]
LDR R1, [kernel_start_a]
LDR R2, [kernel_size_a]
LDR R2, [R2]
BL rebell_memcpy
LDMFD SP!, {R0-R2,PC}
;;;;;;;;;;;;;;;;;;;;;;;;;;;;; variables below
DEFAULT_VARIABLES
pagetable dw gMMUL1PageTable
INTC_DMA_CLR dw 0xB0601004
INTC_ONENAND_CLR dw 0xB0601008
SYSCON_NORMAL_CFG dw 0xE010C010
ATAG_ptr dw 0x20000100 ;
ATAG_CORE dw 0x54410001
ATAG_SERIAL dw 0x54410006
ATAG_REVISION dw 0x54410007
ATAG_CMDLINE dw 0x54410009
VIC1 dw 0xF2100000
VIC2 dw 0xF2200000
VIC3 dw 0xF2300000
def_0x3FF dw 0x3FF
def_0x7FFF dw 0x7FFF
EXT_INT_MASKS dw 0xE0200F00
EXT_INT_CTRL dw 0xE0200E00
VIDINTCON0 dw 0xF8000130
VIDINTCON1 dw 0xF8000134
kernel_start_a dw 0x22000000
kernel_buf dw 0x44000000
kernel_size_a dw kernel_size
framebuffer_ptr dw 0x403EC00C ;0x4EC00000
framebuffer_size dw 0x5DBFF
;;;;;;;;;;;;;;;;;;;;;;;;;;;;; strings at the end
;;;;;;;;;;;;;;;;;;;;;;;;;;;;; add custom strings addresses below (for using by LDR op)
s_kernel_path_a dw s_kernel_path
s_1_a dw s_1
s_2_a dw s_2
s_3_a dw s_3
s_4_a dw s_4
s_5_a dw s_5
s_6_a dw s_6
s_7_a dw s_7
s_8_a dw s_8
s_9_a dw s_9
s_10_a dw s_10
DEFAULT_STRINGS
;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;add custom strings below
s_kernel_path du '/e/zImage',0
s_1 db ' __ __ ',0
s_2 db '/ \ / \____ ___ __ ____ ',0
s_3 db '\ \__/ |__ \\ \/ // __ \ ',0
s_4 db ' \ / / __ \\ /\ ___/ ',0
s_5 db ' \__/\__/ (_____/ \_/ \_____>',0
s_6 db ' ',0
s_7 db ' ,( ,( ,( ,( ,( ,( ',0
s_8 db '`- `- `- `- `- `- ',0
s_9 db '------------------------------',0
s_10 db '------------------------------',0
FUNCTIONS
kernel_size_helper:
code_len = kernel_size_helper - c_start
db 0x4000 - code_len dup 0x00
kernel_size dw 0 ;should be overwritten during runtime 0x43204000 on 8530XXKK5 0x43804000 on 8530JPKA1
END