mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 06:41:43 +00:00
a73b59c51a
debug_ll_addr is only used on machines with an MMU so it can be #ifdef'ed
out safely. This fixes:
arch/arm/kernel/debug.S: Assembler messages:
arch/arm/kernel/debug.S:104: Error: too many positional arguments
The problem was introduced in e5c5f2a ARM: implement debug_ll_io_init().
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
139 lines
2.3 KiB
ArmAsm
139 lines
2.3 KiB
ArmAsm
/*
|
|
* linux/arch/arm/kernel/debug.S
|
|
*
|
|
* Copyright (C) 1994-1999 Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 32-bit debugging code
|
|
*/
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
|
|
.text
|
|
|
|
/*
|
|
* Some debugging routines (useful if you've got MM problems and
|
|
* printk isn't working). For DEBUGGING ONLY!!! Do not leave
|
|
* references to these in a production kernel!
|
|
*/
|
|
|
|
#if !defined(CONFIG_DEBUG_SEMIHOSTING)
|
|
#include CONFIG_DEBUG_LL_INCLUDE
|
|
#endif
|
|
|
|
#ifdef CONFIG_MMU
|
|
.macro addruart_current, rx, tmp1, tmp2
|
|
addruart \tmp1, \tmp2, \rx
|
|
mrc p15, 0, \rx, c1, c0
|
|
tst \rx, #1
|
|
moveq \rx, \tmp1
|
|
movne \rx, \tmp2
|
|
.endm
|
|
|
|
#else /* !CONFIG_MMU */
|
|
.macro addruart_current, rx, tmp1, tmp2
|
|
addruart \rx, \tmp1
|
|
.endm
|
|
|
|
#endif /* CONFIG_MMU */
|
|
|
|
/*
|
|
* Useful debugging routines
|
|
*/
|
|
ENTRY(printhex8)
|
|
mov r1, #8
|
|
b printhex
|
|
ENDPROC(printhex8)
|
|
|
|
ENTRY(printhex4)
|
|
mov r1, #4
|
|
b printhex
|
|
ENDPROC(printhex4)
|
|
|
|
ENTRY(printhex2)
|
|
mov r1, #2
|
|
printhex: adr r2, hexbuf
|
|
add r3, r2, r1
|
|
mov r1, #0
|
|
strb r1, [r3]
|
|
1: and r1, r0, #15
|
|
mov r0, r0, lsr #4
|
|
cmp r1, #10
|
|
addlt r1, r1, #'0'
|
|
addge r1, r1, #'a' - 10
|
|
strb r1, [r3, #-1]!
|
|
teq r3, r2
|
|
bne 1b
|
|
mov r0, r2
|
|
b printascii
|
|
ENDPROC(printhex2)
|
|
|
|
hexbuf: .space 16
|
|
|
|
.ltorg
|
|
|
|
#ifndef CONFIG_DEBUG_SEMIHOSTING
|
|
|
|
ENTRY(printascii)
|
|
addruart_current r3, r1, r2
|
|
b 2f
|
|
1: waituart r2, r3
|
|
senduart r1, r3
|
|
busyuart r2, r3
|
|
teq r1, #'\n'
|
|
moveq r1, #'\r'
|
|
beq 1b
|
|
2: teq r0, #0
|
|
ldrneb r1, [r0], #1
|
|
teqne r1, #0
|
|
bne 1b
|
|
mov pc, lr
|
|
ENDPROC(printascii)
|
|
|
|
ENTRY(printch)
|
|
addruart_current r3, r1, r2
|
|
mov r1, r0
|
|
mov r0, #0
|
|
b 1b
|
|
ENDPROC(printch)
|
|
|
|
#ifdef CONFIG_MMU
|
|
ENTRY(debug_ll_addr)
|
|
addruart r2, r3, ip
|
|
str r2, [r0]
|
|
str r3, [r1]
|
|
mov pc, lr
|
|
ENDPROC(debug_ll_addr)
|
|
#endif
|
|
|
|
#else
|
|
|
|
ENTRY(printascii)
|
|
mov r1, r0
|
|
mov r0, #0x04 @ SYS_WRITE0
|
|
ARM( svc #0x123456 )
|
|
THUMB( svc #0xab )
|
|
mov pc, lr
|
|
ENDPROC(printascii)
|
|
|
|
ENTRY(printch)
|
|
adr r1, hexbuf
|
|
strb r0, [r1]
|
|
mov r0, #0x03 @ SYS_WRITEC
|
|
ARM( svc #0x123456 )
|
|
THUMB( svc #0xab )
|
|
mov pc, lr
|
|
ENDPROC(printch)
|
|
|
|
ENTRY(debug_ll_addr)
|
|
mov r2, #0
|
|
str r2, [r0]
|
|
str r2, [r1]
|
|
mov pc, lr
|
|
ENDPROC(debug_ll_addr)
|
|
|
|
#endif
|