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/* arch/arm/mach-sa1100/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. * */ #include <mach/hardware.h> .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