1/* arch/arm/mach-sa1100/include/mach/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#include <mach/hardware.h> 14 15 .macro addruart, rp, rv, tmp 16 mrc p15, 0, \rp, c1, c0 17 tst \rp, #1 @ MMU enabled? 18 moveq \rp, #0x80000000 @ physical base address 19 movne \rp, #0xf8000000 @ virtual address 20 21 @ We probe for the active serial port here, coherently with 22 @ the comment in arch/arm/mach-sa1100/include/mach/uncompress.h. 23 @ We assume r1 can be clobbered. 24 25 @ see if Ser3 is active 26 add \rp, \rp, #0x00050000 27 ldr \rv, [\rp, #UTCR3] 28 tst \rv, #UTCR3_TXE 29 30 @ if Ser3 is inactive, then try Ser1 31 addeq \rp, \rp, #(0x00010000 - 0x00050000) 32 ldreq \rv, [\rp, #UTCR3] 33 tsteq \rv, #UTCR3_TXE 34 35 @ if Ser1 is inactive, then try Ser2 36 addeq \rp, \rp, #(0x00030000 - 0x00010000) 37 ldreq \rv, [\rp, #UTCR3] 38 tsteq \rv, #UTCR3_TXE 39 40 @ clear top bits, and generate both phys and virt addresses 41 lsl \rp, \rp, #8 42 lsr \rp, \rp, #8 43 orr \rv, \rp, #0xf8000000 @ virtual 44 orr \rp, \rp, #0x80000000 @ physical 45 46 .endm 47 48 .macro senduart,rd,rx 49 str \rd, [\rx, #UTDR] 50 .endm 51 52 .macro waituart,rd,rx 531001: ldr \rd, [\rx, #UTSR1] 54 tst \rd, #UTSR1_TNF 55 beq 1001b 56 .endm 57 58 .macro busyuart,rd,rx 591001: ldr \rd, [\rx, #UTSR1] 60 tst \rd, #UTSR1_TBY 61 bne 1001b 62 .endm 63