arch/arm/mach-sa1100/include/mach/debug-macro.S

   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
  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
  53 1001:           ldr     \rd, [\rx, #UTSR1]
  54                 tst     \rd, #UTSR1_TNF
  55                 beq     1001b
  56                 .endm
  57
  58                 .macro  busyuart,rd,rx
  59 1001:           ldr     \rd, [\rx, #UTSR1]
  60                 tst     \rd, #UTSR1_TBY
  61                 bne     1001b
  62                 .endm