mirror of
https://github.com/adulau/aha.git
synced 2024-12-30 20:56:23 +00:00
22398f57b6
This needs asm/hardware.h - include it. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
58 lines
1.4 KiB
ArmAsm
58 lines
1.4 KiB
ArmAsm
/* linux/include/asm-arm/arch-sa1100/debug-macro.S
|
|
*
|
|
* Debugging macro include header
|
|
*
|
|
* Copyright (C) 1994-1999 Russell King
|
|
* Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
#include <asm/hardware.h>
|
|
|
|
.macro addruart,rx
|
|
mrc p15, 0, \rx, c1, c0
|
|
tst \rx, #1 @ MMU enabled?
|
|
moveq \rx, #0x80000000 @ physical base address
|
|
movne \rx, #0xf8000000 @ virtual address
|
|
|
|
@ We probe for the active serial port here, coherently with
|
|
@ the comment in include/asm-arm/arch-sa1100/uncompress.h.
|
|
@ We assume r1 can be clobbered.
|
|
|
|
@ see if Ser3 is active
|
|
add \rx, \rx, #0x00050000
|
|
ldr r1, [\rx, #UTCR3]
|
|
tst r1, #UTCR3_TXE
|
|
|
|
@ if Ser3 is inactive, then try Ser1
|
|
addeq \rx, \rx, #(0x00010000 - 0x00050000)
|
|
ldreq r1, [\rx, #UTCR3]
|
|
tsteq r1, #UTCR3_TXE
|
|
|
|
@ if Ser1 is inactive, then try Ser2
|
|
addeq \rx, \rx, #(0x00030000 - 0x00010000)
|
|
ldreq r1, [\rx, #UTCR3]
|
|
tsteq r1, #UTCR3_TXE
|
|
|
|
@ if all ports are inactive, then there is nothing we can do
|
|
moveq pc, lr
|
|
.endm
|
|
|
|
.macro senduart,rd,rx
|
|
str \rd, [\rx, #UTDR]
|
|
.endm
|
|
|
|
.macro waituart,rd,rx
|
|
1001: ldr \rd, [\rx, #UTSR1]
|
|
tst \rd, #UTSR1_TNF
|
|
beq 1001b
|
|
.endm
|
|
|
|
.macro busyuart,rd,rx
|
|
1001: ldr \rd, [\rx, #UTSR1]
|
|
tst \rd, #UTSR1_TBY
|
|
bne 1001b
|
|
.endm
|