arch/arm/include/debug/imx.S

   1 /* arch/arm/mach-imx/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 #ifdef CONFIG_DEBUG_IMX1_UART
  14 #define UART_PADDR      0x00206000
  15 #elif defined (CONFIG_DEBUG_IMX25_UART)
  16 #define UART_PADDR      0x43f90000
  17 #elif defined (CONFIG_DEBUG_IMX21_IMX27_UART)
  18 #define UART_PADDR      0x1000a000
  19 #elif defined (CONFIG_DEBUG_IMX31_IMX35_UART)
  20 #define UART_PADDR      0x43f90000
  21 #elif defined (CONFIG_DEBUG_IMX51_UART)
  22 #define UART_PADDR      0x73fbc000
  23 #elif defined (CONFIG_DEBUG_IMX50_IMX53_UART)
  24 #define UART_PADDR      0x53fbc000
  25 #elif defined (CONFIG_DEBUG_IMX6Q_UART2)
  26 #define UART_PADDR      0x021e8000
  27 #elif defined (CONFIG_DEBUG_IMX6Q_UART4)
  28 #define UART_PADDR      0x021f0000
  29 #endif
  30
  31 /*
  32  * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to
  33  * stay sync with that.  It's hard to maintain, and should be fixed
  34  * globally for multi-platform build to use a fixed virtual address
  35  * for low-level debug uart port across platforms.
  36  */
  37 #define IMX_IO_P2V(x)   (                                               \
  38                         (((x) & 0x80000000) >> 7) |                     \
  39                         (0xf4000000 +                                   \
  40                         (((x) & 0x50000000) >> 6) +                     \
  41                         (((x) & 0x0b000000) >> 4) +                     \
  42                         (((x) & 0x000fffff))))
  43
  44 #define UART_VADDR      IMX_IO_P2V(UART_PADDR)
  45
  46                 .macro  addruart, rp, rv, tmp
  47                 ldr     \rp, =UART_PADDR        @ physical
  48                 ldr     \rv, =UART_VADDR        @ virtual
  49                 .endm
  50
  51                 .macro  senduart,rd,rx
  52                 str     \rd, [\rx, #0x40]       @ TXDATA
  53                 .endm
  54
  55                 .macro  waituart,rd,rx
  56                 .endm
  57
  58                 .macro  busyuart,rd,rx
  59 1002:           ldr     \rd, [\rx, #0x98]       @ SR2
  60                 tst     \rd, #1 << 3            @ TXDC
  61                 beq     1002b                   @ wait until transmit done
  62                 .endm