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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* linux/include/asm-arm/arch-lh7a40x/debug-macro.S
2 *
3 * Debugging macro include header
4 *
5 * Copyright (C) 1994-1999 Russell King
6 * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12*/
13
14 @ It is not known if this will be appropriate for every 40x
15 @ board.
16
17 .macro addruart,rx
18 mrc p15, 0, \rx, c1, c0
19 tst \rx, #1 @ MMU enabled?
20 mov \rx, #0x00000700 @ offset from base
21 orreq \rx, \rx, #0x80000000 @ physical base
22 orrne \rx, \rx, #0xf8000000 @ virtual base
23 .endm
24
25 .macro senduart,rd,rx
26 strb \rd, [\rx] @ DATA
27 .endm
28
29 .macro busyuart,rd,rx @ spin while busy
301001: ldr \rd, [\rx, #0x10] @ STATUS
31 tst \rd, #1 << 3 @ BUSY (TX FIFO not empty)
32 bne 1001b @ yes, spin
33 .endm
34
35 .macro waituart,rd,rx @ wait for Tx FIFO room
361001: ldrb \rd, [\rx, #0x10] @ STATUS
37 tst \rd, #1 << 5 @ TXFF (TX FIFO full)
38 bne 1001b @ yes, spin
39 .endm