forked from Minki/linux
f78f104368
asm/hardware.h is not required for the majority of processor support files, ioremap support, mm initialisation, acorn IO support, nor the debug code (which picks up its machine specific includes via debug-macros.S) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
106 lines
1.7 KiB
ArmAsm
106 lines
1.7 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/config.h>
|
|
#include <linux/linkage.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_ICEDCC)
|
|
@@ debug using ARM EmbeddedICE DCC channel
|
|
.macro addruart, rx
|
|
.endm
|
|
|
|
.macro senduart, rd, rx
|
|
mcr p14, 0, \rd, c1, c0, 0
|
|
.endm
|
|
|
|
.macro busyuart, rd, rx
|
|
1001:
|
|
mrc p14, 0, \rx, c0, c0, 0
|
|
tst \rx, #2
|
|
beq 1001b
|
|
|
|
.endm
|
|
|
|
.macro waituart, rd, rx
|
|
mov \rd, #0x2000000
|
|
1001:
|
|
subs \rd, \rd, #1
|
|
bmi 1002f
|
|
mrc p14, 0, \rx, c0, c0, 0
|
|
tst \rx, #2
|
|
bne 1001b
|
|
1002:
|
|
.endm
|
|
#else
|
|
#include <asm/arch/debug-macro.S>
|
|
#endif
|
|
|
|
/*
|
|
* Useful debugging routines
|
|
*/
|
|
ENTRY(printhex8)
|
|
mov r1, #8
|
|
b printhex
|
|
|
|
ENTRY(printhex4)
|
|
mov r1, #4
|
|
b printhex
|
|
|
|
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
|
|
|
|
.ltorg
|
|
|
|
ENTRY(printascii)
|
|
addruart r3
|
|
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
|
|
|
|
ENTRY(printch)
|
|
addruart r3
|
|
mov r1, r0
|
|
mov r0, #0
|
|
b 1b
|
|
|
|
hexbuf: .space 16
|