interesting
/
riscv-openocd
mirror of https://github.com/riscv/riscv-openocd.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
riscv-openocd/contrib/loaders/erase_check/stm8_erase_check.s

59 lines
1.0 KiB
ArmAsm
Raw Normal View History

contrib: replace the GPLv2-or-later license tag Replace the GPLv2-or-later boilerplate with the SPDX tag. The SPDX tag on files *.c is incorrect, as it should use the C99 single line comment using '//'. But current checkpatch doesn't allow C99 comments, so keep using standard C comments, by now. Change-Id: I380d552940f1c405309a3346454251c0e80b5a45 Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Reviewed-on: https://review.openocd.org/c/openocd/+/7159 Tested-by: jenkins
2022-08-30 15:18:31 -05:00
/* SPDX-License-Identifier: GPL-2.0-or-later */
stm8 : new target New STM8 target based mostly on mips4k. Target communication through STLINK/SWIM. No flash driver yet but it is still possible to program flash through load_image command. The usual target debug methods are implemented. Change-Id: I7216f231d3ac7c70cae20f1cd8463c2ed864a329 Signed-off-by: Ake Rehnman <ake.rehnman@gmail.com> Reviewed-on: http://openocd.zylin.com/3953 Tested-by: jenkins Reviewed-by: Tomas Vanek <vanekt@fbl.cz> Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2017-11-06 12:56:28 -06:00
/*
contrib: replace the GPLv2-or-later license tag Replace the GPLv2-or-later boilerplate with the SPDX tag. The SPDX tag on files *.c is incorrect, as it should use the C99 single line comment using '//'. But current checkpatch doesn't allow C99 comments, so keep using standard C comments, by now. Change-Id: I380d552940f1c405309a3346454251c0e80b5a45 Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Reviewed-on: https://review.openocd.org/c/openocd/+/7159 Tested-by: jenkins
2022-08-30 15:18:31 -05:00
* Copyright (C) 2017 Ake Rehnman
* ake.rehnman(at)gmail.com
*/
stm8 : new target New STM8 target based mostly on mips4k. Target communication through STLINK/SWIM. No flash driver yet but it is still possible to program flash through load_image command. The usual target debug methods are implemented. Change-Id: I7216f231d3ac7c70cae20f1cd8463c2ed864a329 Signed-off-by: Ake Rehnman <ake.rehnman@gmail.com> Reviewed-on: http://openocd.zylin.com/3953 Tested-by: jenkins Reviewed-by: Tomas Vanek <vanekt@fbl.cz> Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2017-11-06 12:56:28 -06:00
;;
;; erase check memory code
;;
.org 0x0
;; start address
start_addr: .byte 0x00
.word 0x8000
;; byte count
byte_cnt: .byte 0x00
.word 0x8000
;
; SP must point to start_addr on entry
; first relocate start_addr to the location
; we are running at
start:
ldw X,SP
ldw .cont+2,X
ldw X,(start_addr+1,SP) ;start addr
ldw Y,(byte_cnt+1,SP) ;count
ld A,#0xff
;
; if count == 0 return
.L1:
tnzw Y
jrne .decrcnt ;continue if low word != 0
tnz (byte_cnt,SP) ;high byte
jreq .exit ;goto exit
;
; decrement count (byte_cnt)
.decrcnt:
tnzw Y ;low word count
jrne .decr1
dec (byte_cnt,SP) ;high byte
.decr1:
decw Y; decr low word
;
; first check if [start_addr] is 0xff
.cont:
ldf A, [start_addr.e]
cp A,#0xff
jrne .exit ;exit if not 0xff
;
; increment start_addr (addr)
incw X
jrne .L1
inc (start_addr,SP) ;increment high byte
jra .L1
;
.exit:
ldw (start_addr+1,SP),X ;start addr
ldw (byte_cnt+1,SP),Y ;count
break