linux/arch/arm/mach-l7200/include/mach/debug-macro.S
Nicolas Pitre 639da5ee37 ARM: add an extra temp register to the low level debugging addruart macro
Some platforms (like OMAP not to name it) are doing rather complicated
hacks just to determine the base UART address to use.  Let's give their
addruart macro some slack by providing an extra work register which will
allow for much needed cleanups.

This is basically a no-op as this commit is only adding the extra argument
to the macro but no one is using it yet.

Signed-off-by: nicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: Kevin Hilman <khilman@ti.com>
2011-09-26 10:11:25 -04:00

39 lines
961 B
ArmAsm

/* arch/arm/mach-l7200/include/mach/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.
*
*/
.equ io_virt, IO_BASE
.equ io_phys, IO_START
.macro addruart, rp, rv, tmp
mov \rp, #0x00044000 @ UART1
@ mov \rp, #0x00045000 @ UART2
add \rv, \rp, #io_virt @ virtual address
add \rp, \rp, #io_phys @ physical base address
.endm
.macro senduart,rd,rx
str \rd, [\rx, #0x0] @ UARTDR
.endm
.macro waituart,rd,rx
1001: ldr \rd, [\rx, #0x18] @ UARTFLG
tst \rd, #1 << 5 @ UARTFLGUTXFF - 1 when full
bne 1001b
.endm
.macro busyuart,rd,rx
1001: ldr \rd, [\rx, #0x18] @ UARTFLG
tst \rd, #1 << 3 @ UARTFLGUBUSY - 1 when busy
bne 1001b
.endm