mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
synced 2024-12-21 22:50:27 +00:00
110 lines
2.8 KiB
ArmAsm
110 lines
2.8 KiB
ArmAsm
|
/*
|
||
|
|
Boot.S: boot loader for Siemens DVB-S card
|
||
|
|
|
||
|
|
Copyright (C) 2001 Convergence integrated media GmbH
|
||
|
|
Written by Ralph Metzler
|
||
|
|
<rjkm@convergence.de>
|
||
|
|
Copyright (C) 2006 Matthieu CASTET <castet.mattheiu@free.fr>
|
||
|
|
|
||
|
|
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 2
|
||
|
|
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, write to the Free Software
|
||
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
check AV711x_3_1.pdf for some hardware infos
|
||
|
|
build it with :
|
||
|
|
$ cc -mbig-endian -c Boot.S
|
||
|
|
$ ld -Ttext 0x2c000000 -EB -o Boot Boot.o
|
||
|
|
$ objcopy -Obinary Boot
|
||
|
|
*/
|
||
|
|
|
||
|
|
.text
|
||
|
|
.align
|
||
|
|
.globl _start
|
||
|
|
_start:
|
||
|
|
b reset // reset vector
|
||
|
|
movs pc, r14 // undefined
|
||
|
|
subs pc, r14, #4 // SWI
|
||
|
|
subs pc, r14, #4 // prefetch abort
|
||
|
|
subs pc, r14, #8 // data abort
|
||
|
|
subs pc, r14, #4 // reserved
|
||
|
|
subs pc, r14, #4 // IRQ
|
||
|
|
subs pc, r14, #4 // FIQ
|
||
|
|
|
||
|
|
.word tbl // table needed by firmware ROM
|
||
|
|
tbl: .word (endtbl - tbl)
|
||
|
|
.word 0
|
||
|
|
.word conf
|
||
|
|
endtbl: .word 0
|
||
|
|
conf: .word 0xa5a55a5a
|
||
|
|
.word 0x001f1555
|
||
|
|
.word 0x00000009
|
||
|
|
|
||
|
|
reset: ldr r13, buffer
|
||
|
|
ldr r4, flag
|
||
|
|
mov r0, #0
|
||
|
|
str r0, [r4]
|
||
|
|
str r0, [r4, #4]
|
||
|
|
|
||
|
|
ldr r1, wait_address
|
||
|
|
ldr r2, flag_address
|
||
|
|
ldr r3, sram
|
||
|
|
|
||
|
|
copycode: // copy the code HW Sram
|
||
|
|
ldmia r1!, {r5-r12}
|
||
|
|
stmia r3!, {r5-r12}
|
||
|
|
cmp r1, r2
|
||
|
|
ble copycode
|
||
|
|
ldr pc, sram // jump to the copied code
|
||
|
|
|
||
|
|
wait: ldrh r1, [r4] // wait for flag!=0
|
||
|
|
cmp r1, #0
|
||
|
|
beq wait
|
||
|
|
|
||
|
|
mov r1, r13 // buffer address
|
||
|
|
ldr r3, [r4,#4] // destaddr
|
||
|
|
|
||
|
|
ldrh r2, [r4,#2] // get segment length
|
||
|
|
add r2, r2, #63 // round length to next 64 bytes
|
||
|
|
movs r2, r2, lsr #6 // and divide by 64
|
||
|
|
moveq r0, #2 // if 0, set flag to 2, else signal
|
||
|
|
strh r0, [r4] // that buffer is accepted by setting to 0
|
||
|
|
beq wait
|
||
|
|
|
||
|
|
copyloop:
|
||
|
|
ldmia r1!, {r5-r12}
|
||
|
|
stmia r3!, {r5-r12}
|
||
|
|
ldmia r1!, {r5-r12}
|
||
|
|
stmia r3!, {r5-r12}
|
||
|
|
subs r2, r2, #1
|
||
|
|
bne copyloop
|
||
|
|
|
||
|
|
eor r13, r13, #0x1400 // switch to other buffer
|
||
|
|
b wait
|
||
|
|
|
||
|
|
// flag is stored at 0x2c0003f8, length at 0x2c0003fa,
|
||
|
|
// destaddr at 0x2c0003fc
|
||
|
|
|
||
|
|
flag: .word 0x2c0003f8
|
||
|
|
|
||
|
|
|
||
|
|
// buffer 1 is at 0x2c000400, buffer 2 at 0x2c001000
|
||
|
|
|
||
|
|
buffer: .word 0x2c000400
|
||
|
|
|
||
|
|
sram: .word 0x9e000800
|
||
|
|
wait_address: .word wait
|
||
|
|
flag_address: .word flag
|