| /* linux/include/asm-arm/arch-sa1100/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 <asm/hardware.h> |
| |
| .macro addruart,rx |
| mrc p15, 0, \rx, c1, c0 |
| tst \rx, #1 @ MMU enabled? |
| moveq \rx, #0x80000000 @ physical base address |
| movne \rx, #0xf8000000 @ virtual address |
| |
| @ We probe for the active serial port here, coherently with |
| @ the comment in include/asm-arm/arch-sa1100/uncompress.h. |
| @ We assume r1 can be clobbered. |
| |
| @ see if Ser3 is active |
| add \rx, \rx, #0x00050000 |
| ldr r1, [\rx, #UTCR3] |
| tst r1, #UTCR3_TXE |
| |
| @ if Ser3 is inactive, then try Ser1 |
| addeq \rx, \rx, #(0x00010000 - 0x00050000) |
| ldreq r1, [\rx, #UTCR3] |
| tsteq r1, #UTCR3_TXE |
| |
| @ if Ser1 is inactive, then try Ser2 |
| addeq \rx, \rx, #(0x00030000 - 0x00010000) |
| ldreq r1, [\rx, #UTCR3] |
| tsteq r1, #UTCR3_TXE |
| |
| @ if all ports are inactive, then there is nothing we can do |
| moveq pc, lr |
| .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 |