mirror of https://gitee.com/openkylin/linux.git
40 lines
1.2 KiB
ArmAsm
40 lines
1.2 KiB
ArmAsm
/* linux/include/asm-arm/arch-lh7a40x/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.
|
|
*
|
|
*/
|
|
|
|
@ It is not known if this will be appropriate for every 40x
|
|
@ board.
|
|
|
|
.macro addruart,rx
|
|
mrc p15, 0, \rx, c1, c0
|
|
tst \rx, #1 @ MMU enabled?
|
|
mov \rx, #0x00000700 @ offset from base
|
|
orreq \rx, \rx, #0x80000000 @ physical base
|
|
orrne \rx, \rx, #0xf8000000 @ virtual base
|
|
.endm
|
|
|
|
.macro senduart,rd,rx
|
|
strb \rd, [\rx] @ DATA
|
|
.endm
|
|
|
|
.macro busyuart,rd,rx @ spin while busy
|
|
1001: ldr \rd, [\rx, #0x10] @ STATUS
|
|
tst \rd, #1 << 3 @ BUSY (TX FIFO not empty)
|
|
bne 1001b @ yes, spin
|
|
.endm
|
|
|
|
.macro waituart,rd,rx @ wait for Tx FIFO room
|
|
1001: ldrb \rd, [\rx, #0x10] @ STATUS
|
|
tst \rd, #1 << 5 @ TXFF (TX FIFO full)
|
|
bne 1001b @ yes, spin
|
|
.endm
|