69 lines
1.7 KiB
ArmAsm
69 lines
1.7 KiB
ArmAsm
|
/* arch/arm/include/debug/sa1100.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.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define UTCR3 0x0c
|
||
|
|
#define UTDR 0x14
|
||
|
|
#define UTSR1 0x20
|
||
|
|
#define UTCR3_TXE 0x00000002 /* Transmit Enable */
|
||
|
|
#define UTSR1_TBY 0x00000001 /* Transmitter BusY (read) */
|
||
|
|
#define UTSR1_TNF 0x00000004 /* Transmit FIFO Not Full (read) */
|
||
|
|
|
||
|
|
.macro addruart, rp, rv, tmp
|
||
|
|
mrc p15, 0, \rp, c1, c0
|
||
|
|
tst \rp, #1 @ MMU enabled?
|
||
|
|
moveq \rp, #0x80000000 @ physical base address
|
||
|
|
movne \rp, #0xf8000000 @ virtual address
|
||
|
|
|
||
|
|
@ We probe for the active serial port here, coherently with
|
||
|
|
@ the comment in arch/arm/mach-sa1100/include/mach/uncompress.h.
|
||
|
|
@ We assume r1 can be clobbered.
|
||
|
|
|
||
|
|
@ see if Ser3 is active
|
||
|
|
add \rp, \rp, #0x00050000
|
||
|
|
ldr \rv, [\rp, #UTCR3]
|
||
|
|
tst \rv, #UTCR3_TXE
|
||
|
|
|
||
|
|
@ if Ser3 is inactive, then try Ser1
|
||
|
|
addeq \rp, \rp, #(0x00010000 - 0x00050000)
|
||
|
|
ldreq \rv, [\rp, #UTCR3]
|
||
|
|
tsteq \rv, #UTCR3_TXE
|
||
|
|
|
||
|
|
@ if Ser1 is inactive, then try Ser2
|
||
|
|
addeq \rp, \rp, #(0x00030000 - 0x00010000)
|
||
|
|
ldreq \rv, [\rp, #UTCR3]
|
||
|
|
tsteq \rv, #UTCR3_TXE
|
||
|
|
|
||
|
|
@ clear top bits, and generate both phys and virt addresses
|
||
|
|
lsl \rp, \rp, #8
|
||
|
|
lsr \rp, \rp, #8
|
||
|
|
orr \rv, \rp, #0xf8000000 @ virtual
|
||
|
|
orr \rp, \rp, #0x80000000 @ physical
|
||
|
|
|
||
|
|
.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
|