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Fixed MTP to work with TWRP

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awab228 2018-06-19 23:16:04 +02:00
commit f6dfaef42e
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47
arch/cris/boot/rescue/Makefile Normal file
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#
# Makefile for rescue (bootstrap) code
#
# CC = gcc-cris -mlinux -march=v32 $(LINUXINCLUDE)
# ccflags-$(CONFIG_ETRAX_ARCH_V32) += -I$(srctree)/include/asm/arch/mach/ \
# -I$(srctree)/include/asm/arch
# asflags-y += -I $(srctree)/include/asm/arch/mach/ -I $(srctree)/include/asm/arch
# LD = gcc-cris -mlinux -march=v32 -nostdlib
asflags-y += $(LINUXINCLUDE)
ccflags-y += -O2 $(LINUXINCLUDE)
arch-$(CONFIG_ETRAX_ARCH_V10) = v10
arch-$(CONFIG_ETRAX_ARCH_V32) = v32
ldflags-y += -T $(srctree)/$(src)/rescue_$(arch-y).lds
OBJCOPYFLAGS = -O binary --remove-section=.bss
obj-$(CONFIG_ETRAX_ARCH_V32) = $(obj)/head_v32.o
obj-$(CONFIG_ETRAX_ARCH_V10) = $(obj)/head_v10.o
OBJECTS := $(obj-y)
targets := rescue.o rescue.bin
$(obj)/rescue.o: $(OBJECTS) FORCE
$(call if_changed,ld)
$(obj)/rescue.bin: $(obj)/rescue.o FORCE
$(call if_changed,objcopy)
cp -p $(obj)/rescue.bin $(objtree)
$(obj)/testrescue.bin: $(obj)/testrescue.o
$(OBJCOPY) $(OBJCOPYFLAGS) $(obj)/testrescue.o tr.bin
# Pad it to 784 bytes
dd if=/dev/zero of=tmp2423 bs=1 count=784
cat tr.bin tmp2423 >testrescue_tmp.bin
dd if=testrescue_tmp.bin of=$(obj)/testrescue.bin bs=1 count=784
rm tr.bin tmp2423 testrescue_tmp.bin
$(obj)/kimagerescue.bin: $(obj)/kimagerescue.o
$(OBJCOPY) $(OBJCOPYFLAGS) $(obj)/kimagerescue.o ktr.bin
# Pad it to 784 bytes, that's what the rescue loader expects
dd if=/dev/zero of=tmp2423 bs=1 count=784
cat ktr.bin tmp2423 >kimagerescue_tmp.bin
dd if=kimagerescue_tmp.bin of=$(obj)/kimagerescue.bin bs=1 count=784
rm ktr.bin tmp2423 kimagerescue_tmp.bin

360
arch/cris/boot/rescue/head_v10.S Normal file
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/*
* Rescue code, made to reside at the beginning of the
* flash-memory. when it starts, it checks a partition
* table at the first sector after the rescue sector.
* the partition table was generated by the product builder
* script and contains offsets, lengths, types and checksums
* for each partition that this code should check.
*
* If any of the checksums fail, we assume the flash is so
* corrupt that we can't use it to boot into the ftp flash
* loader, and instead we initialize the serial port to
* receive a flash-loader and new flash image. we dont include
* any flash code here, but just accept a certain amount of
* bytes from the serial port and jump into it. the downloaded
* code is put in the cache.
*
* The partitiontable is designed so that it is transparent to
* code execution - it has a relative branch opcode in the
* beginning that jumps over it. each entry contains extra
* data so we can add stuff later.
*
* Partition table format:
*
* Code transparency:
*
* 2 bytes [opcode 'nop']
* 2 bytes [opcode 'di']
* 4 bytes [opcode 'ba <offset>', 8-bit or 16-bit version]
* 2 bytes [opcode 'nop', delay slot]
*
* Table validation (at +10):
*
* 2 bytes [magic/version word for partitiontable - 0xef, 0xbe]
* 2 bytes [length of all entries plus the end marker]
* 4 bytes [checksum for the partitiontable itself]
*
* Entries, each with the following format, last has offset -1:
*
* 4 bytes [offset in bytes, from start of flash]
* 4 bytes [length in bytes of partition]
* 4 bytes [checksum, simple longword sum]
* 2 bytes [partition type]
* 2 bytes [flags, only bit 0 used, ro/rw = 1/0]
* 16 bytes [reserved for future use]
*
* End marker
*
* 4 bytes [-1]
*
* 10 bytes [0, padding]
*
* Bit 0 in flags signifies RW or RO. The rescue code only bothers
* to check the checksum for RO partitions, since the others will
* change their data without updating the checksums. A 1 in bit 0
* means RO, 0 means RW. That way, it is possible to set a partition
* in RO mode initially, and later mark it as RW, since you can always
* write 0's to the flash.
*
* During the wait for serial input, the status LED will flash so the
* user knows something went wrong.
*
* Copyright (C) 1999-2007 Axis Communications AB
*/
#ifdef CONFIG_ETRAX_AXISFLASHMAP
#define ASSEMBLER_MACROS_ONLY
#include <arch/sv_addr_ag.h>
;; The partitiontable is looked for at the first sector after the boot
;; sector. Sector size is 65536 bytes in all flashes we use.
#define PTABLE_START CONFIG_ETRAX_PTABLE_SECTOR
#define PTABLE_MAGIC 0xbeef
;; The normal Etrax100 on-chip boot ROM does serial boot at 0x380000f0.
;; That is not where we put our downloaded serial boot-code.
;; The length is enough for downloading code that loads the rest
;; of itself (after having setup the DRAM etc).
;; It is the same length as the on-chip ROM loads, so the same
;; host loader can be used to load a rescued product as well as
;; one booted through the Etrax serial boot code.
#define CODE_START 0x40000000
#define CODE_LENGTH 784
#ifdef CONFIG_ETRAX_RESCUE_SER0
#define SERXOFF R_SERIAL0_XOFF
#define SERBAUD R_SERIAL0_BAUD
#define SERRECC R_SERIAL0_REC_CTRL
#define SERRDAT R_SERIAL0_REC_DATA
#define SERSTAT R_SERIAL0_STATUS
#endif
#ifdef CONFIG_ETRAX_RESCUE_SER1
#define SERXOFF R_SERIAL1_XOFF
#define SERBAUD R_SERIAL1_BAUD
#define SERRECC R_SERIAL1_REC_CTRL
#define SERRDAT R_SERIAL1_REC_DATA
#define SERSTAT R_SERIAL1_STATUS
#endif
#ifdef CONFIG_ETRAX_RESCUE_SER2
#define SERXOFF R_SERIAL2_XOFF
#define SERBAUD R_SERIAL2_BAUD
#define SERRECC R_SERIAL2_REC_CTRL
#define SERRDAT R_SERIAL2_REC_DATA
#define SERSTAT R_SERIAL2_STATUS
#endif
#ifdef CONFIG_ETRAX_RESCUE_SER3
#define SERXOFF R_SERIAL3_XOFF
#define SERBAUD R_SERIAL3_BAUD
#define SERRECC R_SERIAL3_REC_CTRL
#define SERRDAT R_SERIAL3_REC_DATA
#define SERSTAT R_SERIAL3_STATUS
#endif
#define NOP_DI 0xf025050f
#define RAM_INIT_MAGIC 0x56902387
.text
;; This is the entry point of the rescue code
;; 0x80000000 if loaded in flash (as it should be)
;; Since etrax actually starts at address 2 when booting from flash, we
;; put a nop (2 bytes) here first so we dont accidentally skip the di
nop
di
jump in_cache ; enter cached area instead
in_cache:
;; First put a jump test to give a possibility of upgrading the
;; rescue code without erasing/reflashing the sector.
;; We put a longword of -1 here and if it is not -1, we jump using
;; the value as jump target. Since we can always change 1's to 0's
;; without erasing the sector, it is possible to add new
;; code after this and altering the jumptarget in an upgrade.
jtcd: move.d [jumptarget], $r0
cmp.d 0xffffffff, $r0
beq no_newjump
nop
jump [$r0]
jumptarget:
.dword 0xffffffff ; can be overwritten later to insert new code
no_newjump:
#ifdef CONFIG_ETRAX_ETHERNET
;; Start MII clock to make sure it is running when tranceiver is reset
move.d 0x3, $r0 ; enable = on, phy = mii_clk
move.d $r0, [R_NETWORK_GEN_CONFIG]
#endif
;; We need to setup the bus registers before we start using the DRAM
#include "../../../arch-v10/lib/dram_init.S"
;; we now should go through the checksum-table and check the listed
;; partitions for errors.
move.d PTABLE_START, $r3
move.d [$r3], $r0
cmp.d NOP_DI, $r0 ; make sure the nop/di is there...
bne do_rescue
nop
;; skip the code transparency block (10 bytes).
addq 10, $r3
;; check for correct magic
move.w [$r3+], $r0
cmp.w PTABLE_MAGIC, $r0
bne do_rescue ; didn't recognize - trig rescue
nop
;; check for correct ptable checksum
movu.w [$r3+], $r2 ; ptable length
move.d $r2, $r8 ; save for later, length of total ptable
addq 28, $r8 ; account for the rest
move.d [$r3+], $r4 ; ptable checksum
move.d $r3, $r1
jsr checksum ; r1 source, r2 length, returns in r0
cmp.d $r0, $r4
bne do_rescue ; didn't match - trig rescue
nop
;; ptable is ok. validate each entry.
moveq -1, $r7
ploop: move.d [$r3+], $r1 ; partition offset (from ptable start)
bne notfirst ; check if it is the partition containing ptable
nop ; yes..
move.d $r8, $r1 ; for its checksum check, skip the ptable
move.d [$r3+], $r2 ; partition length
sub.d $r8, $r2 ; minus the ptable length
ba bosse
nop
notfirst:
cmp.d -1, $r1 ; the end of the ptable ?
beq flash_ok ; if so, the flash is validated
move.d [$r3+], $r2 ; partition length
bosse: move.d [$r3+], $r5 ; checksum
move.d [$r3+], $r4 ; type and flags
addq 16, $r3 ; skip the reserved bytes
btstq 16, $r4 ; check ro flag
bpl ploop ; rw partition, skip validation
nop
btstq 17, $r4 ; check bootable flag
bpl 1f
nop
move.d $r1, $r7 ; remember boot partition offset
1:
add.d PTABLE_START, $r1
jsr checksum ; checksum the partition
cmp.d $r0, $r5
beq ploop ; checksums matched, go to next entry
nop
;; otherwise fall through to the rescue code.
do_rescue:
;; setup port PA and PB default initial directions and data
;; (so we can flash LEDs, and so that DTR and others are set)
move.b CONFIG_ETRAX_DEF_R_PORT_PA_DIR, $r0
move.b $r0, [R_PORT_PA_DIR]
move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA, $r0
move.b $r0, [R_PORT_PA_DATA]
move.b CONFIG_ETRAX_DEF_R_PORT_PB_DIR, $r0
move.b $r0, [R_PORT_PB_DIR]
move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA, $r0
move.b $r0, [R_PORT_PB_DATA]
;; setup the serial port at 115200 baud
moveq 0, $r0
move.d $r0, [SERXOFF]
move.b 0x99, $r0
move.b $r0, [SERBAUD] ; 115.2kbaud for both transmit and receive
move.b 0x40, $r0 ; rec enable
move.b $r0, [SERRECC]
moveq 0, $r1 ; "timer" to clock out a LED red flash
move.d CODE_START, $r3 ; destination counter
movu.w CODE_LENGTH, $r4; length
wait_ser:
addq 1, $r1
#ifndef CONFIG_ETRAX_NO_LEDS
#ifdef CONFIG_ETRAX_PA_LEDS
move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA, $r2
#endif
#ifdef CONFIG_ETRAX_PB_LEDS
move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA, $r2
#endif
move.d (1 << CONFIG_ETRAX_LED1R) | (1 << CONFIG_ETRAX_LED2R), $r0
btstq 16, $r1
bpl 1f
nop
or.d $r0, $r2 ; set bit
ba 2f
nop
1: not $r0 ; clear bit
and.d $r0, $r2
2:
#ifdef CONFIG_ETRAX_PA_LEDS
move.b $r2, [R_PORT_PA_DATA]
#endif
#ifdef CONFIG_ETRAX_PB_LEDS
move.b $r2, [R_PORT_PB_DATA]
#endif
#ifdef CONFIG_ETRAX_90000000_LEDS
move.b $r2, [0x90000000]
#endif
#endif
;; check if we got something on the serial port
move.b [SERSTAT], $r0
btstq 0, $r0 ; data_avail
bpl wait_ser
nop
;; got something - copy the byte and loop
move.b [SERRDAT], $r0
move.b $r0, [$r3+]
subq 1, $r4 ; decrease length
bne wait_ser
nop
;; jump into downloaded code
move.d RAM_INIT_MAGIC, $r8 ; Tell next product that DRAM is
; initialized
jump CODE_START
flash_ok:
;; check r7, which contains either -1 or the partition to boot from
cmp.d -1, $r7
bne 1f
nop
move.d PTABLE_START, $r7; otherwise use the ptable start
1:
move.d RAM_INIT_MAGIC, $r8 ; Tell next product that DRAM is
; initialized
jump $r7 ; boot!
;; Helper subroutines
;; Will checksum by simple addition
;; r1 - source
;; r2 - length in bytes
;; result will be in r0
checksum:
moveq 0, $r0
moveq CONFIG_ETRAX_FLASH1_SIZE, $r6
;; If the first physical flash memory is exceeded wrap to the
;; second one
btstq 26, $r1 ; Are we addressing first flash?
bpl 1f
nop
clear.d $r6
1: test.d $r6 ; 0 = no wrapping
beq 2f
nop
lslq 20, $r6 ; Convert MB to bytes
sub.d $r1, $r6
2: addu.b [$r1+], $r0
subq 1, $r6 ; Flash memory left
beq 3f
subq 1, $r2 ; Length left
bne 2b
nop
ret
nop
3: move.d MEM_CSE1_START, $r1 ; wrap to second flash
ba 2b
nop
#endif

26
arch/cris/boot/rescue/head_v32.S Normal file
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/*
* Just get started by jumping to CONFIG_ETRAX_PTABLE_SECTOR to start
* kernel decompressor.
*
* In practice, this only works for NOR flash (or some convoluted RAM boot)
* and hence is not really useful for Artpec-3, so it's Etrax FS / NOR only.
*
*/
#include <mach/startup.inc>
#ifdef CONFIG_ETRAX_AXISFLASHMAP
;; Code
.text
start:
;; Start clocks for used blocks.
START_CLOCKS
move.d CONFIG_ETRAX_PTABLE_SECTOR, $r10
jump $r10 ; Jump to decompressor
nop
#endif

141
arch/cris/boot/rescue/kimagerescue.S Normal file
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/*
* Rescue code to be prepended on a kimage and copied to the
* rescue serial port.
* This is called from the rescue code, it will copy received data to
* 4004000 and after a timeout jump to it.
*/
#define ASSEMBLER_MACROS_ONLY
#include <arch/sv_addr_ag.h>
#define CODE_START 0x40004000
#define CODE_LENGTH 784
#define TIMEOUT_VALUE 1000
#ifdef CONFIG_ETRAX_RESCUE_SER0
#define SERXOFF R_SERIAL0_XOFF
#define SERBAUD R_SERIAL0_BAUD
#define SERRECC R_SERIAL0_REC_CTRL
#define SERRDAT R_SERIAL0_REC_DATA
#define SERSTAT R_SERIAL0_STATUS
#endif
#ifdef CONFIG_ETRAX_RESCUE_SER1
#define SERXOFF R_SERIAL1_XOFF
#define SERBAUD R_SERIAL1_BAUD
#define SERRECC R_SERIAL1_REC_CTRL
#define SERRDAT R_SERIAL1_REC_DATA
#define SERSTAT R_SERIAL1_STATUS
#endif
#ifdef CONFIG_ETRAX_RESCUE_SER2
#define SERXOFF R_SERIAL2_XOFF
#define SERBAUD R_SERIAL2_BAUD
#define SERRECC R_SERIAL2_REC_CTRL
#define SERRDAT R_SERIAL2_REC_DATA
#define SERSTAT R_SERIAL2_STATUS
#endif
#ifdef CONFIG_ETRAX_RESCUE_SER3
#define SERXOFF R_SERIAL3_XOFF
#define SERBAUD R_SERIAL3_BAUD
#define SERRECC R_SERIAL3_REC_CTRL
#define SERRDAT R_SERIAL3_REC_DATA
#define SERSTAT R_SERIAL3_STATUS
#endif
.text
;; This is the entry point of the rescue code
;; 0x80000000 if loaded in flash (as it should be)
;; since etrax actually starts at address 2 when booting from flash, we
;; put a nop (2 bytes) here first so we dont accidentally skip the di
nop
di
;; setup port PA and PB default initial directions and data
;; (so we can flash LEDs, and so that DTR and others are set)
move.b CONFIG_ETRAX_DEF_R_PORT_PA_DIR, $r0
move.b $r0, [R_PORT_PA_DIR]
move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA, $r0
move.b $r0, [R_PORT_PA_DATA]
move.b CONFIG_ETRAX_DEF_R_PORT_PB_DIR, $r0
move.b $r0, [R_PORT_PB_DIR]
move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA, $r0
move.b $r0, [R_PORT_PB_DATA]
;; We need to setup the bus registers before we start using the DRAM
#include "../../lib/dram_init.S"
;; Setup the stack to a suitably high address.
;; We assume 8 MB is the minimum DRAM in an eLinux
;; product and put the sp at the top for now.
move.d 0x40800000, $sp
;; setup the serial port at 115200 baud
moveq 0, $r0
move.d $r0, [SERXOFF]
move.b 0x99, $r0
move.b $r0, [SERBAUD] ; 115.2kbaud for both transmit
; and receive
move.b 0x40, $r0 ; rec enable
move.b $r0, [SERRECC]
moveq 0, $r1 ; "timer" to clock out a LED red flash
move.d CODE_START, $r3 ; destination counter
move.d CODE_LENGTH, $r4 ; length
move.d TIMEOUT_VALUE, $r5 ; "timeout" until jump
wait_ser:
addq 1, $r1
subq 1, $r5 ; decrease timeout
beq jump_start ; timed out
nop
#ifndef CONFIG_ETRAX_NO_LEDS
#ifdef CONFIG_ETRAX_PA_LEDS
move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA, $r2
#endif
#ifdef CONFIG_ETRAX_PB_LEDS
move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA, $r2
#endif
move.d (1 << CONFIG_ETRAX_LED1R) | (1 << CONFIG_ETRAX_LED2R), $r0
btstq 16, $r1
bpl 1f
nop
or.d $r0, $r2 ; set bit
ba 2f
nop
1: not $r0 ; clear bit
and.d $r0, $r2
2:
#ifdef CONFIG_ETRAX_PA_LEDS
move.b $r2, [R_PORT_PA_DATA]
#endif
#ifdef CONFIG_ETRAX_PB_LEDS
move.b $r2, [R_PORT_PB_DATA]
#endif
#endif
;; check if we got something on the serial port
move.b [SERSTAT], $r0
btstq 0, $r0 ; data_avail
bpl wait_ser
nop
;; got something - copy the byte and loop
move.b [SERRDAT], $r0
move.b $r0, [$r3+]
move.d TIMEOUT_VALUE, $r5 ; reset "timeout"
subq 1, $r4 ; decrease length
bne wait_ser
nop
jump_start:
;; jump into downloaded code
jump CODE_START

20
arch/cris/boot/rescue/rescue_v10.lds Normal file
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MEMORY
{
flash : ORIGIN = 0x00000000,
LENGTH = 0x00100000
}
SECTIONS
{
.text :
{
stext = . ;
*(.text)
etext = . ;
} > flash
.data :
{
*(.data)
edata = . ;
} > flash
}

43
arch/cris/boot/rescue/rescue_v32.lds Normal file
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/*#OUTPUT_FORMAT(elf32-us-cris) */
OUTPUT_ARCH (crisv32)
/* Now that NAND support has been stripped, this file could be simplified,
* but it doesn't do any harm on the other hand so why bother. */
MEMORY
{
bootblk : ORIGIN = 0x38000000,
LENGTH = 0x00004000
intmem : ORIGIN = 0x38004000,
LENGTH = 0x00005000
}
SECTIONS
{
.text :
{
_stext = . ;
*(.text)
*(.init.text)
*(.rodata)
*(.rodata.*)
_etext = . ;
} > bootblk
.data :
{
*(.data)
_edata = . ;
} > bootblk
.bss :
{
_bss = . ;
*(.bss)
_end = ALIGN( 0x10 ) ;
} > intmem
/* Get rid of stuff from EXPORT_SYMBOL(foo). */
/DISCARD/ :
{
*(__ksymtab_strings)
*(__ksymtab)
}
}

24
arch/cris/boot/rescue/testrescue.S Normal file
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/*
* Simple testcode to download by the rescue block.
* Just lights some LEDs to show it was downloaded correctly.
*
* Copyright (C) 1999 Axis Communications AB
*/
#define ASSEMBLER_MACROS_ONLY
#include <arch/sv_addr_ag.h>
.text
nop
nop
moveq -1, $r2
move.b $r2, [R_PORT_PA_DIR]
moveq 0, $r2
move.b $r2, [R_PORT_PA_DATA]
endless:
nop
ba endless
nop